{ "version": "2.2", "instance": { "bti-20241231.htm": { "nsprefix": "bti", "nsuri": "http://www.bat.com/20241231", "dts": { "inline": { "local": [ "bti-20241231.htm" ] }, "schema": { "local": [ "bti-20241231.xsd" ], "remote": [ "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd", "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd", "http://www.xbrl.org/2003/xl-2003-12-31.xsd", "http://www.xbrl.org/2003/xlink-2003-12-31.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd", "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd", "https://www.xbrl.org/dtr/type/2022-03-31/types.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-roles-2024.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-types-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-types-2024.xsd", "https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/dimensions/rol_full_ifrs-dim_2024-03-27.xsd", "https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd", "https://xbrl.org/2020/extensible-enumerations-2.0.xsd", "https://xbrl.sec.gov/country/2024/country-2024.xsd", "https://xbrl.sec.gov/currency/2024/currency-2024.xsd", "https://xbrl.sec.gov/cyd/2024/cyd-2024.xsd", "https://xbrl.sec.gov/cyd/2024/cyd-af-2024.xsd", "https://xbrl.sec.gov/cyd/2024/cyd-af-sub-2024.xsd", "https://xbrl.sec.gov/dei/2024/dei-2024.xsd", "https://xbrl.sec.gov/ecd/2024/ecd-2024.xsd", "https://xbrl.sec.gov/ecd/2024/ecd-sub-2024.xsd", "https://xbrl.sec.gov/stpr/2024/stpr-2024.xsd" ] }, "calculationLink": { "local": [ "bti-20241231_cal.xml" ] }, "definitionLink": { "local": [ "bti-20241231_def.xml" ], "remote": [ "https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/dimensions/dim_full_ifrs_2024-03-27_role-995000.xml" ] }, "labelLink": { "local": [ "bti-20241231_lab.xml" ] }, "presentationLink": { "local": [ "bti-20241231_pre.xml" ] } }, "keyStandard": 507, "keyCustom": 720, "axisStandard": 67, "axisCustom": 22, "memberStandard": 162, "memberCustom": 402, "hidden": { "total": 7, "http://xbrl.sec.gov/dei/2024": 4, "http://www.bat.com/20241231": 3 }, "contextCount": 2051, "entityCount": 1, "segmentCount": 612, "elementCount": 2330, "unitCount": 58, "baseTaxonomies": { "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full": 4202, "http://xbrl.sec.gov/dei/2024": 123, "http://xbrl.sec.gov/cyd/2024": 15, "http://xbrl.sec.gov/ecd/2024": 1, "http://fasb.org/srt/2024": 1 }, "report": { "R1": { "role": "http://www.bat.com/role/Cover", "longName": "0000001 - Document - Cover", "shortName": "Cover", "isDefault": "true", "groupType": "document", "subGroupType": "", "menuCat": "Cover", "order": "1", "firstAnchor": { "contextRef": "c-1", "name": "dei:DocumentType", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "dei:DocumentType", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R2": { "role": "http://www.bat.com/role/AuditInformation", "longName": "0000002 - Document - Audit Information", "shortName": "Audit Information", "isDefault": "false", "groupType": "document", "subGroupType": "", "menuCat": "Cover", "order": "2", "firstAnchor": { "contextRef": "c-1", "name": "dei:AuditorName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "dei:AuditorName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R3": { "role": "http://www.bat.com/role/GroupIncomeStatement", "longName": "9952151 - Statement - Group Income Statement", "shortName": "Group Income Statement", "isDefault": "false", "groupType": "statement", "subGroupType": "", "menuCat": "Statements", "order": "3", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:RawMaterialsAndConsumablesUsed", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R4": { "role": "http://www.bat.com/role/GroupIncomeStatementParenthetical", "longName": "9952153 - Statement - Group Income Statement (Parenthetical)", "shortName": "Group Income Statement (Parenthetical)", "isDefault": "false", "groupType": "statement", "subGroupType": "parenthetical", "menuCat": "Statements", "order": "4", "firstAnchor": { "contextRef": "c-1", "name": "bti:DutyExciseAndOtherTaxesLeviedOnTobaccoAndTobaccoRelatedProducts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "link:footnote", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DutyExciseAndOtherTaxesLeviedOnTobaccoAndTobaccoRelatedProducts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "link:footnote", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R5": { "role": "http://www.bat.com/role/GroupStatementofComprehensiveIncome", "longName": "9952154 - Statement - Group Statement of Comprehensive Income", "shortName": "Group Statement of Comprehensive Income", "isDefault": "false", "groupType": "statement", "subGroupType": "", "menuCat": "Statements", "order": "5", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R6": { "role": "http://www.bat.com/role/GroupStatementofChangesinEquity", "longName": "9952156 - Statement - Group Statement of Changes in Equity", "shortName": "Group Statement of Changes in Equity", "isDefault": "false", "groupType": "statement", "subGroupType": "", "menuCat": "Statements", "order": "6", "firstAnchor": { "contextRef": "c-78", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-75", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R7": { "role": "http://www.bat.com/role/GroupBalanceSheet", "longName": "9952157 - Statement - Group Balance Sheet", "shortName": "Group Balance Sheet", "isDefault": "false", "groupType": "statement", "subGroupType": "", "menuCat": "Statements", "order": "7", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:IntangibleAssetsAndGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:CurrentTaxAssetsCurrent", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R8": { "role": "http://www.bat.com/role/GroupCashFlowStatement", "longName": "9952158 - Statement - Group Cash Flow Statement", "shortName": "Group Cash Flow Statement", "isDefault": "false", "groupType": "statement", "subGroupType": "", "menuCat": "Statements", "order": "8", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R9": { "role": "http://www.bat.com/role/GroupCashFlowStatementParenthetical", "longName": "9952159 - Statement - Group Cash Flow Statement (Parenthetical)", "shortName": "Group Cash Flow Statement (Parenthetical)", "isDefault": "false", "groupType": "statement", "subGroupType": "parenthetical", "menuCat": "Statements", "order": "9", "firstAnchor": { "contextRef": "c-31", "name": "bti:IncreaseDecreaseInTransfersToHeldForSale", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-85", "name": "bti:IncreaseDecreaseInTransfersToHeldForSale", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "link:footnote", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R10": { "role": "http://www.bat.com/role/Accountingpolicies", "longName": "9952160 - Disclosure - Accounting policies", "shortName": "Accounting policies", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "10", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfMaterialAccountingPolicyInformationExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfMaterialAccountingPolicyInformationExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R11": { "role": "http://www.bat.com/role/Segmentalanalyses", "longName": "9952161 - Disclosure - Segmental analyses", "shortName": "Segmental analyses", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "11", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEntitysReportableSegmentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R12": { "role": "http://www.bat.com/role/Employeebenefitcosts", "longName": "9952162 - Disclosure - Employee benefit costs", "shortName": "Employee benefit costs", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "12", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInformationAboutEmployeeBenefitCostsExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInformationAboutEmployeeBenefitCostsExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R13": { "role": "http://www.bat.com/role/Depreciationamortisationandimpairmentcosts", "longName": "9952163 - Disclosure - Depreciation, amortisation and impairment costs", "shortName": "Depreciation, amortisation and impairment costs", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "13", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDepreciationAndAmortisationExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDepreciationAndAmortisationExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R14": { "role": "http://www.bat.com/role/Otheroperatingincome", "longName": "9952164 - Disclosure - Other operating income", "shortName": "Other operating income", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "14", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOtherOperatingIncomeExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R15": { "role": "http://www.bat.com/role/Otheroperatingexpenses", "longName": "9952165 - Disclosure - Other operating expenses", "shortName": "Other operating expenses", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "15", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfExpensesByNatureExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfExpensesByNatureExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R16": { "role": "http://www.bat.com/role/Restructuringandintegrationcosts", "longName": "9952166 - Disclosure - Restructuring and integration costs", "shortName": "Restructuring and integration costs", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "16", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfRestructuringAndIntegrationCostsExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfRestructuringAndIntegrationCostsExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R17": { "role": "http://www.bat.com/role/Netfinancecosts", "longName": "9952167 - Disclosure - Net finance costs", "shortName": "Net finance costs", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "17", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R18": { "role": "http://www.bat.com/role/Associatesandjointventures", "longName": "9952168 - Disclosure - Associates and joint ventures", "shortName": "Associates and joint ventures", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "18", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R19": { "role": "http://www.bat.com/role/Taxationonordinaryactivities", "longName": "9952169 - Disclosure - Taxation on ordinary activities", "shortName": "Taxation on ordinary activities", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "19", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfIncomeTaxExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfIncomeTaxExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R20": { "role": "http://www.bat.com/role/Earningspershare", "longName": "9952170 - Disclosure - Earnings per share", "shortName": "Earnings per share", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "20", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEarningsPerShareExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEarningsPerShareExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R21": { "role": "http://www.bat.com/role/Intangibleassets", "longName": "9952171 - Disclosure - Intangible assets", "shortName": "Intangible assets", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "21", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfIntangibleAssetsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfIntangibleAssetsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R22": { "role": "http://www.bat.com/role/Propertyplantandequipment", "longName": "9952172 - Disclosure - Property, plant and equipment", "shortName": "Property, plant and equipment", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "22", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R23": { "role": "http://www.bat.com/role/Investmentsinassociatesandjointventures", "longName": "9952173 - Disclosure - Investments in associates and joint ventures", "shortName": "Investments in associates and joint ventures", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "23", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentInAssociateExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentInAssociateExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R24": { "role": "http://www.bat.com/role/Retirementbenefitschemes", "longName": "9952174 - Disclosure - Retirement benefit schemes", "shortName": "Retirement benefit schemes", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "24", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEmployeeBenefitsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfEmployeeBenefitsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R25": { "role": "http://www.bat.com/role/Deferredtax", "longName": "9952175 - Disclosure - Deferred tax", "shortName": "Deferred tax", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "25", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDeferredTaxesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDeferredTaxesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R26": { "role": "http://www.bat.com/role/Tradeandotherreceivables", "longName": "9952176 - Disclosure - Trade and other receivables", "shortName": "Trade and other receivables", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "26", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R27": { "role": "http://www.bat.com/role/Investmentsheldatfairvalue", "longName": "9952177 - Disclosure - Investments held at fair value", "shortName": "Investments held at fair value", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "27", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsHeldAtFairValueExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsHeldAtFairValueExplanatoryTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R28": { "role": "http://www.bat.com/role/Derivativefinancialinstruments", "longName": "9952178 - Disclosure - Derivative financial instruments", "shortName": "Derivative financial instruments", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "28", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R29": { "role": "http://www.bat.com/role/Inventories", "longName": "9952179 - Disclosure - Inventories", "shortName": "Inventories", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "29", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInventoriesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInventoriesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R30": { "role": "http://www.bat.com/role/Cashandcashequivalents", "longName": "9952180 - Disclosure - Cash and cash equivalents", "shortName": "Cash and cash equivalents", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "30", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R31": { "role": "http://www.bat.com/role/Capitalandreserves", "longName": "9952181 - Disclosure - Capital and reserves", "shortName": "Capital and reserves", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "31", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R32": { "role": "http://www.bat.com/role/Borrowings", "longName": "9952182 - Disclosure - Borrowings", "shortName": "Borrowings", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "32", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfBorrowingsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfBorrowingsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R33": { "role": "http://www.bat.com/role/Provisionsforliabilities", "longName": "9952183 - Disclosure - Provisions for liabilities", "shortName": "Provisions for liabilities", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "33", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfProvisionsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfProvisionsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R34": { "role": "http://www.bat.com/role/Tradeandotherpayables", "longName": "9952184 - Disclosure - Trade and other payables", "shortName": "Trade and other payables", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "34", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R35": { "role": "http://www.bat.com/role/Financialinstrumentsandriskmanagement", "longName": "9952185 - Disclosure - Financial instruments and risk management", "shortName": "Financial instruments and risk management", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "35", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinancialRiskManagementExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinancialRiskManagementExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R36": { "role": "http://www.bat.com/role/ChangesintheGroup", "longName": "9952186 - Disclosure - Changes in the Group", "shortName": "Changes in the Group", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "36", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfBusinessCombinationsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfBusinessCombinationsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R37": { "role": "http://www.bat.com/role/Sharebasedpayments", "longName": "9952187 - Disclosure - Share-based payments", "shortName": "Share-based payments", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "37", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R38": { "role": "http://www.bat.com/role/Groupemployees", "longName": "9952188 - Disclosure - Group employees", "shortName": "Group employees", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "38", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInformationAboutEmployeesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInformationAboutEmployeesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R39": { "role": "http://www.bat.com/role/Relatedpartydisclosures", "longName": "9952189 - Disclosure - Related party disclosures", "shortName": "Related party disclosures", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "39", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfRelatedPartyExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfRelatedPartyExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R40": { "role": "http://www.bat.com/role/Contingentliabilitiesandfinancialcommitments", "longName": "9952190 - Disclosure - Contingent liabilities and financial commitments", "shortName": "Contingent liabilities and financial commitments", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "40", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R41": { "role": "http://www.bat.com/role/Interestsinsubsidiaries", "longName": "9952191 - Disclosure - Interests in subsidiaries", "shortName": "Interests in subsidiaries", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "41", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInterestsInSubsidiariesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R42": { "role": "http://www.bat.com/role/Sustainabilitycosts", "longName": "9952192 - Disclosure - Sustainability costs", "shortName": "Sustainability costs", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "42", "firstAnchor": { "contextRef": "c-1", "name": "bti:SustainabilityCostsTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:SustainabilityCostsTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R43": { "role": "http://www.bat.com/role/SummarisedfinancialInformation", "longName": "9952193 - Disclosure - Summarised financial Information", "shortName": "Summarised financial Information", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "43", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfConsolidatedAndSeparateFinancialStatementsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfConsolidatedAndSeparateFinancialStatementsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R44": { "role": "http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc", "longName": "995447 - Disclosure - Insider Trading Policies and Procedures", "shortName": "Insider Trading Policies and Procedures", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "44", "firstAnchor": { "contextRef": "c-1", "name": "ecd:InsiderTrdPoliciesProcAdoptedFlag", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ecd:InsiderTrdPoliciesProcAdoptedFlag", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R45": { "role": "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure", "longName": "995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure", "shortName": "Cybersecurity Risk Management and Strategy Disclosure", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "45", "firstAnchor": { "contextRef": "c-1", "name": "cyd:CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "cyd:CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R46": { "role": "http://www.bat.com/role/AccountingpoliciesPolicies", "longName": "9955511 - Disclosure - Accounting policies (Policies)", "shortName": "Accounting policies (Policies)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "policies", "menuCat": "Policies", "order": "46", "firstAnchor": { "contextRef": "c-1", "name": "bti:DescriptionOfAccountingPolicyForBasisOfPreparationExplanatoryPolicyTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DescriptionOfAccountingPolicyForBasisOfPreparationExplanatoryPolicyTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R47": { "role": "http://www.bat.com/role/SegmentalanalysesTables", "longName": "9955512 - Disclosure - Segmental analyses (Tables)", "shortName": "Segmental analyses (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "47", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOperatingSegmentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOperatingSegmentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R48": { "role": "http://www.bat.com/role/EmployeebenefitcostsTables", "longName": "9955513 - Disclosure - Employee benefit costs (Tables)", "shortName": "Employee benefit costs (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "48", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R49": { "role": "http://www.bat.com/role/DepreciationamortisationandimpairmentcostsTables", "longName": "9955514 - Disclosure - Depreciation, amortisation and impairment costs (Tables)", "shortName": "Depreciation, amortisation and impairment costs (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "49", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R50": { "role": "http://www.bat.com/role/OtheroperatingexpensesTables", "longName": "9955515 - Disclosure - Other operating expenses (Tables)", "shortName": "Other operating expenses (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "50", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfOtherOperatingExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R51": { "role": "http://www.bat.com/role/RestructuringandIntegrationCostsTables", "longName": "9955516 - Disclosure - Restructuring and Integration Costs (Tables)", "shortName": "Restructuring and Integration Costs (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "51", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfProfitLossFromOperatingActivitiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfProfitLossFromOperatingActivitiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R52": { "role": "http://www.bat.com/role/NetfinancecostsTables", "longName": "9955517 - Disclosure - Net finance costs (Tables)", "shortName": "Net finance costs (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "52", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInterestIncomeExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfInterestIncomeExpenseExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R53": { "role": "http://www.bat.com/role/AssociatesandjointventuresTables", "longName": "9955518 - Disclosure - Associates and joint ventures (Tables)", "shortName": "Associates and joint ventures (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "53", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R54": { "role": "http://www.bat.com/role/TaxationonordinaryactivitiesTables", "longName": "9955519 - Disclosure - Taxation on ordinary activities (Tables)", "shortName": "Taxation on ordinary activities (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "54", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDetailedSummaryOfTaxationOnOrdinaryActivitiesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDetailedSummaryOfTaxationOnOrdinaryActivitiesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R55": { "role": "http://www.bat.com/role/EarningspershareTables", "longName": "9955520 - Disclosure - Earnings per share (Tables)", "shortName": "Earnings per share (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "55", "firstAnchor": { "contextRef": "c-1", "name": "bti:SummaryOfReconciliationOfEarningsUsedToCalculateEarningsPerShareExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:SummaryOfReconciliationOfEarningsUsedToCalculateEarningsPerShareExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R56": { "role": "http://www.bat.com/role/IntangibleassetsTables", "longName": "9955521 - Disclosure - Intangible assets (Tables)", "shortName": "Intangible assets (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "56", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R57": { "role": "http://www.bat.com/role/PropertyplantandequipmentTables", "longName": "9955522 - Disclosure - Property, plant and equipment (Tables)", "shortName": "Property, plant and equipment (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "57", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R58": { "role": "http://www.bat.com/role/InvestmentsinassociatesandjointventuresTables", "longName": "9955523 - Disclosure - Investments in associates and joint ventures (Tables)", "shortName": "Investments in associates and joint ventures (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "58", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsInAssociatesAndJointVenturesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsInAssociatesAndJointVenturesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R59": { "role": "http://www.bat.com/role/RetirementBenefitSchemesTables", "longName": "9955524 - Disclosure - Retirement Benefit Schemes (Tables)", "shortName": "Retirement Benefit Schemes (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "59", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R60": { "role": "http://www.bat.com/role/DeferredtaxTables", "longName": "9955525 - Disclosure - Deferred tax (Tables)", "shortName": "Deferred tax (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "60", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfReconciliationOfNetDeferredTaxAssetLiabilityExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfReconciliationOfNetDeferredTaxAssetLiabilityExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R61": { "role": "http://www.bat.com/role/TradeandotherreceivablesTables", "longName": "9955526 - Disclosure - Trade and other receivables (Tables)", "shortName": "Trade and other receivables (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "61", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R62": { "role": "http://www.bat.com/role/InvestmentsheldatfairvalueTables", "longName": "9955527 - Disclosure - Investments held at fair value (Tables)", "shortName": "Investments held at fair value (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "62", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R63": { "role": "http://www.bat.com/role/DerivativefinancialinstrumentsTables", "longName": "9955528 - Disclosure - Derivative financial instruments (Tables)", "shortName": "Derivative financial instruments (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "63", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R64": { "role": "http://www.bat.com/role/InventoriesTables", "longName": "9955529 - Disclosure - Inventories (Tables)", "shortName": "Inventories (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "64", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R65": { "role": "http://www.bat.com/role/CashandcashequivalentsTables", "longName": "9955530 - Disclosure - Cash and cash equivalents (Tables)", "shortName": "Cash and cash equivalents (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "65", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R66": { "role": "http://www.bat.com/role/CapitalandreservesTables", "longName": "9955531 - Disclosure - Capital and reserves (Tables)", "shortName": "Capital and reserves (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "66", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R67": { "role": "http://www.bat.com/role/BorrowingsTables", "longName": "9955532 - Disclosure - Borrowings (Tables)", "shortName": "Borrowings (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "67", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R68": { "role": "http://www.bat.com/role/ProvisionsforliabilitiesTables", "longName": "9955533 - Disclosure - Provisions for liabilities (Tables)", "shortName": "Provisions for liabilities (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "68", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R69": { "role": "http://www.bat.com/role/TradeandotherpayablesTables", "longName": "9955534 - Disclosure - Trade and other payables (Tables)", "shortName": "Trade and other payables (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "69", "firstAnchor": { "contextRef": "c-1", "name": "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R70": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementTables", "longName": "9955535 - Disclosure - Financial instruments and risk management (Tables)", "shortName": "Financial instruments and risk management (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "70", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R71": { "role": "http://www.bat.com/role/SharebasedpaymentsTables", "longName": "9955536 - Disclosure - Share-based payments (Tables)", "shortName": "Share-based payments (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "71", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R72": { "role": "http://www.bat.com/role/GroupemployeesTables", "longName": "9955537 - Disclosure - Group employees (Tables)", "shortName": "Group employees (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "72", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDetailedInformationAboutAverageNumberOfEmployeesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfDetailedInformationAboutAverageNumberOfEmployeesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R73": { "role": "http://www.bat.com/role/RelatedpartydisclosuresTables", "longName": "9955538 - Disclosure - Related party disclosures (Tables)", "shortName": "Related party disclosures (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "73", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R74": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTables", "longName": "9955539 - Disclosure - Contingent liabilities and financial commitments (Tables)", "shortName": "Contingent liabilities and financial commitments (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "74", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCasesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCasesExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R75": { "role": "http://www.bat.com/role/InterestsinsubsidiariesTables", "longName": "9955540 - Disclosure - Interests in subsidiaries (Tables)", "shortName": "Interests in subsidiaries (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "75", "firstAnchor": { "contextRef": "c-1", "name": "bti:SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R76": { "role": "http://www.bat.com/role/SustainabilitycostsTables", "longName": "9955541 - Disclosure - Sustainability costs (Tables)", "shortName": "Sustainability costs (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "76", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfSustainabilityCostsTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfSustainabilityCostsTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R77": { "role": "http://www.bat.com/role/SummarisedfinancialinformationTables", "longName": "9955542 - Disclosure - Summarised financial information (Tables)", "shortName": "Summarised financial information (Tables)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "tables", "menuCat": "Tables", "order": "77", "firstAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCondensedConsolidatedIncomeStatementExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DisclosureOfCondensedConsolidatedIncomeStatementExplanatoryTableTextBlock", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R78": { "role": "http://www.bat.com/role/AccountingpoliciesDetails", "longName": "9955543 - Disclosure - Accounting policies (Details)", "shortName": "Accounting policies (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "78", "firstAnchor": { "contextRef": "c-99", "name": "ifrs-full:DepreciationRatePropertyPlantAndEquipment", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-99", "name": "ifrs-full:DepreciationRatePropertyPlantAndEquipment", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R79": { "role": "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "longName": "9955544 - Disclosure - Segmental analyses - Additional Information (Details)", "shortName": "Segmental analyses - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "79", "firstAnchor": { "contextRef": "c-30", "name": "bti:ReportableSegmentsNumber", "unitRef": "segment", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:ReportableSegmentsNumber", "unitRef": "segment", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R80": { "role": "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "longName": "9955545 - Disclosure - Segmental analyses - Disclosure of Operating Segment Information (Details)", "shortName": "Segmental analyses - Disclosure of Operating Segment Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "80", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-112", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R81": { "role": "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails", "longName": "9955546 - Disclosure - Segmental analyses - Summary of Depreciation Amortisation and Impairment Charges (Details)", "shortName": "Segmental analyses - Summary of Depreciation Amortisation and Impairment Charges (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "81", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-137", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R82": { "role": "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails", "longName": "9955547 - Disclosure - Segmental analyses - Disclosure of Additional Information by Product Category (Details)", "shortName": "Segmental analyses - Disclosure of Additional Information by Product Category (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "82", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-160", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R83": { "role": "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails", "longName": "9955548 - Disclosure - Segmental analyses - Disclosure of Geographical Information of External Revenue (Details)", "shortName": "Segmental analyses - Disclosure of Geographical Information of External Revenue (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "83", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-181", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R84": { "role": "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "longName": "9955549 - Disclosure - Employee Benefit Costs - Summary of Employee Benefit Costs (Details)", "shortName": "Employee Benefit Costs - Summary of Employee Benefit Costs (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "84", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:WagesAndSalaries", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R85": { "role": "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "longName": "9955550 - Disclosure - Employee Benefit Costs - Additional Information (Details)", "shortName": "Employee Benefit Costs - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "85", "firstAnchor": { "contextRef": "c-1", "name": "bti:RestructuringAndIntegrationCostsAssociatedWithEmployeeBenefitCostsCredit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R86": { "role": "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "longName": "9955551 - Disclosure - Depreciation, Amortisation and Impairment Costs - Summary of Depreciation Amortisation and Impairment Costs (Details)", "shortName": "Depreciation, Amortisation and Impairment Costs - Summary of Depreciation Amortisation and Impairment Costs (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "86", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-208", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R87": { "role": "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "longName": "9955552 - Disclosure - Depreciation, Amortisation and Impairment Costs - Additional Information (Details)", "shortName": "Depreciation, Amortisation and Impairment Costs - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "87", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-215", "name": "ifrs-full:ImpairmentLossRecognisedInProfitOrLossGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R88": { "role": "http://www.bat.com/role/OtherOperatingIncomeDetails", "longName": "9955553 - Disclosure - Other Operating Income (Details)", "shortName": "Other Operating Income (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "88", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:OtherIncome", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:GainsLossesArisingFromSaleAndLeasebackTransactions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R89": { "role": "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "longName": "9955554 - Disclosure - Other operating expenses - Summary of Other Operating Expenses (Details)", "shortName": "Other operating expenses - Summary of Other Operating Expenses (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "89", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:OtherExpenseByNature", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:ResearchAndDevelopmentExcludingEmployeeBenefitCostsAndDepreciation", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R90": { "role": "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "longName": "9955555 - Disclosure - Other operating expenses - Master Settlements Agreement - Additional Information (Details)", "shortName": "Other operating expenses - Master Settlements Agreement - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "90", "firstAnchor": { "contextRef": "c-266", "name": "bti:PaymentsInRespectOfLitigationClaimSettlements", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-266", "name": "bti:PaymentsInRespectOfLitigationClaimSettlements", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R91": { "role": "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "longName": "9955556 - Disclosure - Other operating expenses - MSA Liability (Details)", "shortName": "Other operating expenses - MSA Liability (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "91", "firstAnchor": { "contextRef": "c-40", "name": "bti:MasterSettlementAgreementLiability", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-238", "name": "ifrs-full:GainsLossesOnExchangeDifferencesOnTranslationNetOfTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ix:continuation", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R92": { "role": "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "longName": "9955557 - Disclosure - Other operating expenses - Canada Proposed Plans - Additional Information (Details)", "shortName": "Other operating expenses - Canada Proposed Plans - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "92", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Provisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R93": { "role": "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "longName": "9955558 - Disclosure - Other operating expenses - Litigation costs - Additional Information (Details)", "shortName": "Other operating expenses - Litigation costs - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "93", "firstAnchor": { "contextRef": "c-277", "name": "bti:CreditsReceived", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-277", "name": "bti:CreditsReceived", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R94": { "role": "http://www.bat.com/role/OtheroperatingexpensesResearchandDevelopmentAdditionalInformationDetails", "longName": "9955559 - Disclosure - Other operating expenses - Research and Development - Additional Information (Details)", "shortName": "Other operating expenses - Research and Development - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "94", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ResearchAndDevelopmentExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:ResearchAndDevelopmentExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R95": { "role": "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "longName": "9955560 - Disclosure - Other operating expenses - Loss on Disposal of Business - Additional Information (Details)", "shortName": "Other operating expenses - Loss on Disposal of Business - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "95", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProvisionUsedOtherProvisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-284", "name": "ifrs-full:GainsLossesRecognisedWhenControlInSubsidiaryIsLost", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R96": { "role": "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "longName": "9955561 - Disclosure - Other operating expenses - Partial disposal of shares in ITC - Additional Information (Details)", "shortName": "Other operating expenses - Partial disposal of shares in ITC - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "96", "firstAnchor": { "contextRef": "c-290", "name": "bti:ProportionOfOwnershipInterestDisposed", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R97": { "role": "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "longName": "9955562 - Disclosure - Other operating expenses - Charges in respect of DOJ and OFAC investigations - Additional Information (Details)", "shortName": "Other operating expenses - Charges in respect of DOJ and OFAC investigations - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "97", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:TradeAndOtherCurrentPayables", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1406", "name": "ifrs-full:AdditionalProvisionsOtherProvisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R98": { "role": "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "longName": "9955563 - Disclosure - Other operating expenses - Charges in Respect of Nigerian FCCPC Case - Additional Information (Details)", "shortName": "Other operating expenses - Charges in Respect of Nigerian FCCPC Case - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "98", "firstAnchor": { "contextRef": "c-296", "name": "bti:OtherAdjustingItemsWhichHaveBeenAdjustedWithinOtherOperatingExpenses", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-296", "name": "bti:OtherAdjustingItemsWhichHaveBeenAdjustedWithinOtherOperatingExpenses", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R99": { "role": "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "longName": "9955564 - Disclosure - Other operating expenses - Assets held for sale - Additional Information (Details)", "shortName": "Other operating expenses - Assets held for sale - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "99", "firstAnchor": { "contextRef": "c-1", "name": "bti:CostsReversalRelatingToAssetsHeldForSale", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R100": { "role": "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "longName": "9955565 - Disclosure - Other operating expenses - Romania and Brazil other taxes (Details)", "shortName": "Other operating expenses - Romania and Brazil other taxes (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "100", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:TaxExpenseOtherThanIncomeTaxExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-300", "name": "ifrs-full:MiscellaneousOtherOperatingExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R101": { "role": "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails", "longName": "9955566 - Disclosure - Other Operating Expenses - Summary of Auditor's Remuneration (Details)", "shortName": "Other Operating Expenses - Summary of Auditor's Remuneration (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "101", "firstAnchor": { "contextRef": "c-337", "name": "ifrs-full:AuditorsRemunerationForOtherServices", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfAuditorsRemunerationExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-337", "name": "ifrs-full:AuditorsRemunerationForOtherServices", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfAuditorsRemunerationExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R102": { "role": "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "longName": "9955567 - Disclosure - Other Operating Expenses - Auditor's Remuneration - Additional Information (Details)", "shortName": "Other Operating Expenses - Auditor's Remuneration - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "102", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:AuditorsRemuneration", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-340", "name": "ifrs-full:AuditorsRemuneration", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R103": { "role": "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails", "longName": "9955568 - Disclosure - Restructuring and Integration Costs - Summary of Cost of Initiatives in Profit from Operations (Details)", "shortName": "Restructuring and Integration Costs - Summary of Cost of Initiatives in Profit from Operations (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "103", "firstAnchor": { "contextRef": "c-1", "name": "bti:RestructuringAndIntegrationCostsAssociatedWithEmployeeBenefitCostsCredit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:RestructuringAndIntegrationCostsAssociatedWithOtherOperatingIncome", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R104": { "role": "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "longName": "9955569 - Disclosure - Restructuring and Integration Costs - Additional Information (Details)", "shortName": "Restructuring and Integration Costs - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "104", "firstAnchor": { "contextRef": "c-1", "name": "bti:RestructuringAndIntegrationCostsAssociatedWithEmployeeBenefitCostsCredit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-350", "name": "ifrs-full:ReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R105": { "role": "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails", "longName": "9955570 - Disclosure - Net finance costs - Summary of Net Finance Costs/(Income) (Details)", "shortName": "Net finance costs - Summary of Net Finance Costs/(Income) (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "105", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:InterestExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:InterestExpense", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R106": { "role": "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "longName": "9955571 - Disclosure - Net finance costs - Additional Information (Details)", "shortName": "Net finance costs - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "106", "firstAnchor": { "contextRef": "c-30", "name": "bti:TenderOffer", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:TenderOffer", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R107": { "role": "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "longName": "9955572 - Disclosure - Associates and Joint Ventures - Schedule of Profit Loss of Associates and Joint Ventures Accounted for Using Equity Method (Details)", "shortName": "Associates and Joint Ventures - Schedule of Profit Loss of Associates and Joint Ventures Accounted for Using Equity Method (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "107", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-373", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R108": { "role": "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "longName": "9955573 - Disclosure - Associates and Joint Ventures - Additional Information (Details)", "shortName": "Associates and Joint Ventures - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "108", "firstAnchor": { "contextRef": "c-1", "name": "bti:OtherComprehensiveIncomeAssociatesDifferencesOnExchangeThatWillBeReclassifiedToProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-229", "name": "ifrs-full:GainsLossesOnDisposalsOfInvestments", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R109": { "role": "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "longName": "9955574 - Disclosure - Associates and Joint Ventures - Summary of Group's Share of the Result of Associates and Joint Ventures (Details)", "shortName": "Associates and Joint Ventures - Summary of Group's Share of the Result of Associates and Joint Ventures (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "109", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-374", "name": "ifrs-full:ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R110": { "role": "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "longName": "9955575 - Disclosure - Associates and Joint Ventures - Summary of Financial Information of the Group's Associates and Joint Ventures (Details)", "shortName": "Associates and Joint Ventures - Summary of Financial Information of the Group's Associates and Joint Ventures (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "110", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-229", "name": "ifrs-full:ProfitLossBeforeTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R111": { "role": "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails", "longName": "9955576 - Disclosure - Taxation on Ordinary Activities - Summary of Taxation on Ordinary Activities (Details)", "shortName": "Taxation on Ordinary Activities - Summary of Taxation on Ordinary Activities (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "111", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R112": { "role": "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "longName": "9955577 - Disclosure - Taxation on Ordinary Activities - Additional Information (Details)", "shortName": "Taxation on Ordinary Activities - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "112", "firstAnchor": { "contextRef": "c-1", "name": "bti:InterestRelatedToAdjustingTaxPayables", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:AdjustingItemsIncludedInTaxation", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R113": { "role": "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails", "longName": "9955578 - Disclosure - Taxation on Ordinary Activities - Summary of Factors Affecting the Taxation Charge (Details)", "shortName": "Taxation on Ordinary Activities - Summary of Factors Affecting the Taxation Charge (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "113", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLossBeforeTax", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:AccountingProfit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R114": { "role": "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails", "longName": "9955579 - Disclosure - Taxation on Ordinary Activities - Summary of Tax on Items Recognised Directly in Other Comprehensive Income (Details)", "shortName": "Taxation on Ordinary Activities - Summary of Tax on Items Recognised Directly in Other Comprehensive Income (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "114", "firstAnchor": { "contextRef": "c-1", "name": "bti:CurrentTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:CurrentTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R115": { "role": "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails", "longName": "9955580 - Disclosure - Earnings Per Share - Summary of Reconciliation of Earnings Used To Calculate Earnings Per Share (Details)", "shortName": "Earnings Per Share - Summary of Reconciliation of Earnings Used To Calculate Earnings Per Share (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "115", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLossAttributableToOwnersOfParent", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:CouponOnPerpetualHybridBonds", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R116": { "role": "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails", "longName": "9955581 - Disclosure - Earnings Per Share - Summary of Reconciliation from Basic to Diluted Earnings Per Share (Details)", "shortName": "Earnings Per Share - Summary of Reconciliation from Basic to Diluted Earnings Per Share (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "116", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:ParValuePerShare", "unitRef": "gbpPerShare", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:WeightedAverageShares", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R117": { "role": "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "longName": "9955582 - Disclosure - Earnings Per Share - Summary of Adjusted Earnings Per Share (Details)", "shortName": "Earnings Per Share - Summary of Adjusted Earnings Per Share (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "117", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsBasic", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R118": { "role": "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "longName": "9955583 - Disclosure - Earnings Per Share - Summary of Headline Earnings Per Share (Details)", "shortName": "Earnings Per Share - Summary of Headline Earnings Per Share (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "118", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:HeadlineEarningsBasicEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R119": { "role": "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "longName": "9955584 - Disclosure - Intangible assets - Schedule of Movement In Intangible Assets (Details)", "shortName": "Intangible assets - Schedule of Movement In Intangible Assets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "119", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:IntangibleAssetsAndGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfGeographicalInformationOfNonCurrentAssetsExplanatoryTableTextBlock", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R120": { "role": "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "longName": "9955585 - Disclosure - Intangible assets - Additional Information (Details)", "shortName": "Intangible assets - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "120", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Goodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:ContractualCommitmentsForAcquisitionOfIntangibleAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R121": { "role": "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails", "longName": "9955586 - Disclosure - Intangible assets - Schedule of definite-lived intangible assets (Details)", "shortName": "Intangible assets - Schedule of definite-lived intangible assets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "121", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-202", "name": "ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R122": { "role": "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "longName": "9955587 - Disclosure - Intangible assets - Indefinite Lived Intangible Assets (Details)", "shortName": "Intangible assets - Indefinite Lived Intangible Assets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "122", "firstAnchor": { "contextRef": "c-1", "name": "bti:ValueInUseCalculationOnDetailedFinancialBudgetsExtrapolatedPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-512", "name": "bti:FiveYearVolumeCompoundAnnualGrowthRate", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R123": { "role": "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "longName": "9955588 - Disclosure - Intangible assets -Key assumptions used in assessing the definite-lived brands for impairment (Details)", "shortName": "Intangible assets -Key assumptions used in assessing the definite-lived brands for impairment (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "123", "firstAnchor": { "contextRef": "c-1", "name": "bti:ValueInUseCalculationOnDetailedFinancialBudgetsExtrapolatedPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-495", "name": "bti:FiveYearVolumeCompoundAnnualGrowthRate", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R124": { "role": "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "longName": "9955589 - Disclosure - Intangible assets - Schedule of Cash Generating Unit (Details)", "shortName": "Intangible assets - Schedule of Cash Generating Unit (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "124", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Goodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-524", "name": "ifrs-full:Goodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R125": { "role": "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "longName": "9955590 - Disclosure - Intangible assets - Schedule of Impairment Charge From Possible Change in Assumptions (Details)", "shortName": "Intangible assets - Schedule of Impairment Charge From Possible Change in Assumptions (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "125", "firstAnchor": { "contextRef": "c-551", "name": "bti:ImpairmentTestingCurrentHeadroom", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-551", "name": "bti:ImpairmentTestingCurrentHeadroom", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R126": { "role": "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails", "longName": "9955591 - Disclosure - Intangible assets (revised) - Canada Goodwill Impairment (Details)", "shortName": "Intangible assets (revised) - Canada Goodwill Impairment (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "126", "firstAnchor": { "contextRef": "c-574", "name": "bti:AssumptionsIncreaseInPreTaxDiscountRate", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-574", "name": "bti:AssumptionsIncreaseInPreTaxDiscountRate", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R127": { "role": "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "longName": "9955592 - Disclosure - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details)", "shortName": "Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "127", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:IncreaseDecreaseThroughTransfersPropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R128": { "role": "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "longName": "9955593 - Disclosure - Property, Plant and Equipment - Additional Information (Details)", "shortName": "Property, Plant and Equipment - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "128", "firstAnchor": { "contextRef": "c-1", "name": "bti:CashReceivedFromSaleAndLeasebackTransactions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:CashReceivedFromSaleAndLeasebackTransactions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R129": { "role": "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "longName": "9955594 - Disclosure - Property, Plant and Equipment - Schedule of Leasehold Land and Property Comprises (Details)", "shortName": "Property, Plant and Equipment - Schedule of Leasehold Land and Property Comprises (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "129", "firstAnchor": { "contextRef": "c-616", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-658", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDetailedInformationAboutLeaseholdLandAndPropertyComprisesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R130": { "role": "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "longName": "9955595 - Disclosure - Property, Plant And Equipment - Schedule of Leasehold Property Net Book Value Movements (Details)", "shortName": "Property, Plant And Equipment - Schedule of Leasehold Property Net Book Value Movements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "130", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-590", "name": "ifrs-full:DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDetailedInformationAboutLeaseholdPropertyNetBookValueMovementsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R131": { "role": "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "longName": "9955596 - Disclosure - Property, Plant and Equipment - Schedule of Cost of Freehold Land (Details)", "shortName": "Property, Plant and Equipment - Schedule of Cost of Freehold Land (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "131", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-670", "name": "ifrs-full:PropertyPlantAndEquipmentIncludingRightofuseAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDetailedInformationAboutFreeholdLandExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R132": { "role": "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "longName": "9955597 - Disclosure - Investments in Associates and Joint Ventures - Summary of Investments In Associates And Joint Ventures (Details)", "shortName": "Investments in Associates and Joint Ventures - Summary of Investments In Associates And Joint Ventures (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "132", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:InvestmentAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-373", "name": "bti:InvestmentsInAssociatesAndJointVenturesAdditions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfInvestmentsInAssociatesAndJointVenturesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R133": { "role": "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "longName": "9955598 - Disclosure - Investments in Associates and Joint Ventures - Additional Information (Details)", "shortName": "Investments in Associates and Joint Ventures - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "133", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:InvestmentAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfGeographicalInformationOfNonCurrentAssetsExplanatoryTableTextBlock", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-699", "name": "bti:InvestmentTerm", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R134": { "role": "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "longName": "9955599 - Disclosure - Investments in Associates and Joint Ventures - Summary of Principal Associate Undertakings (Details)", "shortName": "Investments in Associates and Joint Ventures - Summary of Principal Associate Undertakings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "134", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:NoncurrentAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-198", "name": "ifrs-full:NetAssetsLiabilities", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R135": { "role": "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "longName": "9955600 - Disclosure - Retirement Benefit Schemes - Additional Information (Details)", "shortName": "Retirement Benefit Schemes - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "135", "firstAnchor": { "contextRef": "c-1", "name": "bti:PercentageOfPrincipalSchemesToTotalDefinedBenefitSchemes", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:PercentageOfPrincipalSchemesToTotalDefinedBenefitSchemes", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R136": { "role": "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "longName": "9955601 - Disclosure - Retirement Benefit Schemes - Schedule of Defined Benefit Amounts Recognised in Balance Sheets (Details)", "shortName": "Retirement Benefit Schemes - Schedule of Defined Benefit Amounts Recognised in Balance Sheets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "136", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DefinedBenefitObligationAtPresentValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-744", "name": "bti:UnrecognisedFundedSchemeSurplusesDeficit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R137": { "role": "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "longName": "9955602 - Disclosure - Retirement Benefit Schemes - Schedule of Net Liabilities of Funded Pension Schemes by Territory (Details)", "shortName": "Retirement Benefit Schemes - Schedule of Net Liabilities of Funded Pension Schemes by Territory (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "137", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DefinedBenefitObligationAtPresentValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-756", "name": "ifrs-full:DefinedBenefitObligationAtPresentValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R138": { "role": "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "longName": "9955603 - Disclosure - Retirement Benefit Schemes - Schedule of Defined Benefit Amounts Recognised in Income Statement (Details)", "shortName": "Retirement Benefit Schemes - Schedule of Defined Benefit Amounts Recognised in Income Statement (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "138", "firstAnchor": { "contextRef": "c-1", "name": "bti:PostemploymentBenefitExpenseDefinedBenefitPlansCurrentServiceCost", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:PostemploymentBenefitExpenseDefinedBenefitPlansCurrentServiceCost", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R139": { "role": "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "longName": "9955604 - Disclosure - Retirement Benefit Schemes - Schedule of Movements in Scheme Liabilities (Details)", "shortName": "Retirement Benefit Schemes - Schedule of Movements in Scheme Liabilities (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "139", "firstAnchor": { "contextRef": "c-780", "name": "ifrs-full:LiabilityAssetOfDefinedBenefitPlans", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-781", "name": "ifrs-full:LiabilityAssetOfDefinedBenefitPlans", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R140": { "role": "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails", "longName": "9955605 - Disclosure - Retirement Benefit Schemes - Schedule of Scheme Liabilities by Scheme Membership (Details)", "shortName": "Retirement Benefit Schemes - Schedule of Scheme Liabilities by Scheme Membership (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "140", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DefinedBenefitObligationAtPresentValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-795", "name": "ifrs-full:DefinedBenefitObligationAtPresentValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R141": { "role": "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "longName": "9955606 - Disclosure - Retirement Benefit Schemes - Summary of Movements in Funded Scheme Assets (Details)", "shortName": "Retirement Benefit Schemes - Summary of Movements in Funded Scheme Assets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "141", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:PlanAssetsAtFairValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ix:continuation", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-828", "name": "ifrs-full:EquityInstrumentsAmountContributedToFairValueOfPlanAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ix:continuation", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R142": { "role": "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails", "longName": "9955607 - Disclosure - Retirement Benefit Schemes - Summary of Movements in the Unrecognised Scheme Surpluses Recognised in Other Comprehensive Income (Details)", "shortName": "Retirement Benefit Schemes - Summary of Movements in the Unrecognised Scheme Surpluses Recognised in Other Comprehensive Income (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "142", "firstAnchor": { "contextRef": "c-40", "name": "bti:UnrecognisedFundedSchemeSurplusesDeficit", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAssetUnrecognisedFundedSchemeSurpluses", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R143": { "role": "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "longName": "9955608 - Disclosure - Retirement Benefit Schemes - Summary of Actuarial Assumptions Rate for Valuations Plans (Details)", "shortName": "Retirement Benefit Schemes - Summary of Actuarial Assumptions Rate for Valuations Plans (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "143", "firstAnchor": { "contextRef": "c-842", "name": "ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-842", "name": "bti:ActuarialAssumptionOfExpectedRatesOfPensionPaymentIncreases", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R144": { "role": "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails", "longName": "9955609 - Disclosure - Retirement Benefit Schemes - Summary of Weighted Average Life Expectancy Used to Determine Benefit Obligations (Details)", "shortName": "Retirement Benefit Schemes - Summary of Weighted Average Life Expectancy Used to Determine Benefit Obligations (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "144", "firstAnchor": { "contextRef": "c-219", "name": "bti:WeightedAverageLifeExpectancyOfMaleAtAgeSixtyFive", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-219", "name": "bti:WeightedAverageLifeExpectancyOfMaleAtAgeSixtyFive", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R145": { "role": "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails", "longName": "9955610 - Disclosure - Retirement Benefit Schemes - Summary of Sensitivity Analysis (Details)", "shortName": "Retirement Benefit Schemes - Summary of Sensitivity Analysis (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "145", "firstAnchor": { "contextRef": "c-865", "name": "ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-865", "name": "ifrs-full:IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R146": { "role": "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails", "longName": "9955611 - Disclosure - Deferred tax - Summary of Reconciliation of Net Deferred Tax Assets/(Liabilities) (Details)", "shortName": "Deferred tax - Summary of Reconciliation of Net Deferred Tax Assets/(Liabilities) (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "146", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:DeferredTaxLiabilityAsset", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R147": { "role": "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "longName": "9955612 - Disclosure - Deferred tax - Additional Information (Details)", "shortName": "Deferred tax - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "147", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DeferredTaxAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R148": { "role": "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails", "longName": "9955613 - Disclosure - Trade and other receivables - Summary of trade and other receivables (Details)", "shortName": "Trade and other receivables - Summary of trade and other receivables (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "148", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:TradeReceivables", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:TradeReceivables", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R149": { "role": "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "longName": "9955614 - Disclosure - Trade and other receivables - Additional Information (Details)", "shortName": "Trade and other receivables - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "149", "firstAnchor": { "contextRef": "c-30", "name": "bti:LitigationDeposits", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:LitigationDeposits", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R150": { "role": "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails", "longName": "9955615 - Disclosure - Trade and other receivables - Summary of trade and other receivables reported in balance sheet net of allowances (Details)", "shortName": "Trade and other receivables - Summary of trade and other receivables reported in balance sheet net of allowances (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "150", "firstAnchor": { "contextRef": "c-30", "name": "bti:PrepaymentAndAccruedIncome", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-929", "name": "ifrs-full:FinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R151": { "role": "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "longName": "9955616 - Disclosure - Trade and other receivables - Summary of movements in allowance accounts (Details)", "shortName": "Trade and other receivables - Summary of movements in allowance accounts (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "151", "firstAnchor": { "contextRef": "c-937", "name": "ifrs-full:FinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-943", "name": "ifrs-full:IncreaseDecreaseThroughForeignExchangeFinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R152": { "role": "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails", "longName": "9955617 - Disclosure - Investments held at fair value - Schedule of Investments (Details)", "shortName": "Investments held at fair value - Schedule of Investments (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "152", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:DifferenceOnExchangeOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R153": { "role": "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "longName": "9955618 - Disclosure - Investments held at fair value - Additional Information (Details)", "shortName": "Investments held at fair value - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "153", "firstAnchor": { "contextRef": "c-30", "name": "bti:CurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:InvestmentsHeldAtFairValueThroughProfitAndLossDueToExchangeControlRestrictions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R154": { "role": "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails", "longName": "9955619 - Disclosure - Investments held at fair value - Schedule of Reconciliation of Fair Value Investments Cash Flows to Cash Flow Statements (Details)", "shortName": "Investments held at fair value - Schedule of Reconciliation of Fair Value Investments Cash Flows to Cash Flow Statements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "154", "firstAnchor": { "contextRef": "c-1", "name": "bti:CashOutflowFromInvestmentsHeldAtFairValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:CashOutflowFromInvestmentsHeldAtFairValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R155": { "role": "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "longName": "9955620 - Disclosure - Derivative Financial Instruments - Summary of Derivatives (Details)", "shortName": "Derivative Financial Instruments - Summary of Derivatives (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "155", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DerivativeFinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:DerivativeFinancialAssetsRelatedToNetDebt", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R156": { "role": "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "longName": "9955621 - Disclosure - Derivative Financial Instruments - Additional Information (Details)", "shortName": "Derivative Financial Instruments - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "156", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DerivativeFinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1052", "name": "bti:DerivativeFinancialAssetsGrossSettledInflows", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R157": { "role": "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "longName": "9955622 - Disclosure - Derivative Financial Instruments - Summary of Maturity Dates of Gross-settled Derivative Financial Instruments (Details)", "shortName": "Derivative Financial Instruments - Summary of Maturity Dates of Gross-settled Derivative Financial Instruments (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "157", "firstAnchor": { "contextRef": "c-1048", "name": "bti:DerivativeFinancialAssetsGrossSettledInflows", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1048", "name": "bti:DerivativeFinancialAssetsGrossSettledInflows", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R158": { "role": "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "longName": "9955623 - Disclosure - Derivative Financial Instruments - Summary of Items Designated As Hedging Instruments (Details)", "shortName": "Derivative Financial Instruments - Summary of Items Designated As Hedging Instruments (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "158", "firstAnchor": { "contextRef": "c-1056", "name": "ifrs-full:NominalAmountOfHedgingInstrument", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1056", "name": "ifrs-full:NominalAmountOfHedgingInstrument", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R159": { "role": "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails", "longName": "9955624 - Disclosure - Inventories - Summary of Inventories (Details)", "shortName": "Inventories - Summary of Inventories (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "159", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:CurrentRawMaterialsAndCurrentProductionSupplies", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R160": { "role": "http://www.bat.com/role/InventoriesAdditionalInformationDetails", "longName": "9955625 - Disclosure - Inventories - Additional Information (Details)", "shortName": "Inventories - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "160", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:InventoryWritedown2011", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R161": { "role": "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails", "longName": "9955626 - Disclosure - Cash and Cash Equivalents - Schedule Representing Cash and Cash Equivalents (Details)", "shortName": "Cash and Cash Equivalents - Schedule Representing Cash and Cash Equivalents (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "161", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Cash", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:Cash", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R162": { "role": "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "longName": "9955627 - Disclosure - Cash and Cash Equivalents - Summary of Cash and Cash Equivalents Denominated in the Functional Currency of the Subsidiary Undertaking or Other Currencies (Details)", "shortName": "Cash and Cash Equivalents - Summary of Cash and Cash Equivalents Denominated in the Functional Currency of the Subsidiary Undertaking or Other Currencies (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "162", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1080", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R163": { "role": "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails", "longName": "9955628 - Disclosure - Cash and Cash Equivalents - Summary of Net Cash and Cash Equivalents Shown After Deducting Bank Overdrafts and Accrued Interest (Details)", "shortName": "Cash and Cash Equivalents - Summary of Net Cash and Cash Equivalents Shown After Deducting Bank Overdrafts and Accrued Interest (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "163", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:OverdraftsAndAccruedInterest", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R164": { "role": "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "longName": "9955629 - Disclosure - Cash and Cash Equivalents - Additional Information (Details)", "shortName": "Cash and Cash Equivalents - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "164", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:CurrentAccruedIncomeOtherThanCurrentContractAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R165": { "role": "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "longName": "9955630 - Disclosure - Capital and reserves - Summary of Movements of Called Up Share Capital (Details)", "shortName": "Capital and reserves - Summary of Movements of Called Up Share Capital (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "165", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:IssuedCapital", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1088", "name": "ifrs-full:NumberOfSharesIssuedAndFullyPaid", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R166": { "role": "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "longName": "9955631 - Disclosure - Capital and reserves - Additional Information (Details)", "shortName": "Capital and reserves - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "166", "firstAnchor": { "contextRef": "c-30", "name": "bti:NumberOfVotesPerShareholder", "unitRef": "vote", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:CostOfTreasurySharesRepurchasedAndNotCancelled", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R167": { "role": "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails", "longName": "9955632 - Disclosure - Capital and reserves - Summary of Composition of Share Premium Account, Capital Redemption Reserves and Merger Reserves (Details)", "shortName": "Capital and reserves - Summary of Composition of Share Premium Account, Capital Redemption Reserves and Merger Reserves (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "167", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1091", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R168": { "role": "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "longName": "9955633 - Disclosure - Capital and reserves - Summary of Equity Attributed to Owners of The Parent - Movements in Other Reserves and Retained Earnings (Details)", "shortName": "Capital and reserves - Summary of Equity Attributed to Owners of The Parent - Movements in Other Reserves and Retained Earnings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "parenthetical", "menuCat": "Details", "order": "168", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1113", "name": "ifrs-full:ProfitLoss", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R169": { "role": "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "longName": "9955634 - Disclosure - Borrowings - Schedule of Detailed Information About Borrowings (Details)", "shortName": "Borrowings - Schedule of Detailed Information About Borrowings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "169", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:BondsIssued", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:LoansReceived", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R170": { "role": "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "longName": "9955635 - Disclosure - Borrowings - Additional Information (Details)", "shortName": "Borrowings - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "170", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:OtherBorrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:CurrentInterestPayable", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R171": { "role": "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "longName": "9955636 - Disclosure - Borrowings - Schedule of Detailed Information About Repayment of Borrowings (Details)", "shortName": "Borrowings - Schedule of Detailed Information About Repayment of Borrowings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "171", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Borrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1279", "name": "ifrs-full:Borrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R172": { "role": "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "longName": "9955637 - Disclosure - Borrowings - Schedule of Analysis of Borrowings by Currency (Details)", "shortName": "Borrowings - Schedule of Analysis of Borrowings by Currency (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "172", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Borrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:BorrowingsNetOfDerivativeInstrumentAdjustments", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R173": { "role": "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "longName": "9955638 - Disclosure - Borrowings - Schedule of Analysis of Borrowings by Interest Rate Changes (Details)", "shortName": "Borrowings - Schedule of Analysis of Borrowings by Interest Rate Changes (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "173", "firstAnchor": { "contextRef": "c-30", "name": "bti:RepricedBorrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:RepricedBorrowings", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R174": { "role": "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "longName": "9955639 - Disclosure - Borrowings - Schedule of Analysis of Net Debt Movements (Details)", "shortName": "Borrowings - Schedule of Analysis of Net Debt Movements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "174", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:NetDebt", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:NetDebtAdjustmentOnForeignExchange", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R175": { "role": "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "longName": "9955640 - Disclosure - Borrowings - Schedule of Analysis of Net Debt Movements Along with Reconciliation to the Financing Activities in the Group Cash Flow Statement (Details)", "shortName": "Borrowings - Schedule of Analysis of Net Debt Movements Along with Reconciliation to the Financing Activities in the Group Cash Flow Statement (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "175", "firstAnchor": { "contextRef": "c-1", "name": "bti:NetDebtAdjustmentOnCashFlow", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:NonFinancingCashFlowsIncludedInNetDebt", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R176": { "role": "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails", "longName": "9955641 - Disclosure - Provisions for liabilities - Summary of Provisions Excluding Post-Retirement Benefits (Details)", "shortName": "Provisions for liabilities - Summary of Provisions Excluding Post-Retirement Benefits (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "176", "firstAnchor": { "contextRef": "c-40", "name": "ifrs-full:Provisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R177": { "role": "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "longName": "9955642 - Disclosure - Provisions for liabilities - Additional Information (Details)", "shortName": "Provisions for liabilities - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "177", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:NoncurrentProvisions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:PreTaxDiscountRateProvisionCalculation", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R178": { "role": "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails", "longName": "9955643 - Disclosure - Trade and other payables - Summary of Trade and Other Payables (Details)", "shortName": "Trade and other payables - Summary of Trade and Other Payables (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "178", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:TradeAndOtherPayablesToTradeSuppliers", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:DutyExciseAndOtherTaxesPayable", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R179": { "role": "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails", "longName": "9955644 - Disclosure - Trade and other payables - Supplier Financing Arrangements (Details)", "shortName": "Trade and other payables - Supplier Financing Arrangements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "179", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:TradeAndOtherPayablesToTradeSuppliers", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1433", "name": "ifrs-full:TradeAndOtherPayablesToTradeSuppliers", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R180": { "role": "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails", "longName": "9955645 - Disclosure - Trade and other payables - Payment term (Details)", "shortName": "Trade and other payables - Payment term (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "180", "firstAnchor": { "contextRef": "c-1459", "name": "ifrs-full:NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForFinancialLiabilitiesThatArePartOfSupplierFinanceArrangements", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1453", "name": "ifrs-full:NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForFinancialLiabilitiesThatArePartOfSupplierFinanceArrangements", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfRangeOfPaymentDueDatesOfFinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R181": { "role": "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "longName": "9955646 - Disclosure - Trade and other payables - Additional Information (Details)", "shortName": "Trade and other payables - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "181", "firstAnchor": { "contextRef": "c-30", "name": "bti:DeferredIncomeExcludingFIIGLO", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:DeferredIncomeExcludingFIIGLO", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R182": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementManagementofFinancialRisksAdditionalInformationDetails", "longName": "9955647 - Disclosure - Financial instruments and risk management - Management of Financial Risks, Additional Information (Details)", "shortName": "Financial instruments and risk management - Management of Financial Risks, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "182", "firstAnchor": { "contextRef": "c-1", "name": "bti:ProportionOfAverageCostOfDebt", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:ProportionOfAverageCostOfDebt", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R183": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "longName": "9955648 - Disclosure - Financial instruments and risk management - Liquidity Risk, Additional Information (Details)", "shortName": "Financial instruments and risk management - Liquidity Risk, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "183", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1463", "name": "bti:TargetAverageCentrallyManagedDebtMaturity", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R184": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "longName": "9955649 - Disclosure - Financial instruments and risk management - Currency Risk, Additional Information (Details)", "shortName": "Financial instruments and risk management - Currency Risk, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "184", "firstAnchor": { "contextRef": "c-1508", "name": "bti:SensitivityFactorRateToCurrencyRiskExposure", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1508", "name": "bti:SensitivityFactorRateToCurrencyRiskExposure", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R185": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "longName": "9955650 - Disclosure - Financial instruments and risk management - Interest Rate Risk, Additional Information (Details)", "shortName": "Financial instruments and risk management - Interest Rate Risk, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "185", "firstAnchor": { "contextRef": "c-30", "name": "bti:RatioOfFloatingRateBorrowingsAfterImpactOfDerivatives", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "bti:RatioOfFloatingRateBorrowingsAfterImpactOfDerivatives", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R186": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "longName": "9955651 - Disclosure - Financial instruments and risk management - Credit Risk, Additional Information (Details)", "shortName": "Financial instruments and risk management - Credit Risk, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "186", "firstAnchor": { "contextRef": "c-1517", "name": "ifrs-full:MaximumExposureToCreditRisk", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1517", "name": "ifrs-full:MaximumExposureToCreditRisk", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R187": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "longName": "9955652 - Disclosure - Financial instruments and risk management - Summary of Assets and Liabilities Measured at Fair Value (Details)", "shortName": "Financial instruments and risk management - Summary of Assets and Liabilities Measured at Fair Value (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "187", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:FinancialAssetsAtFairValue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R188": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails", "longName": "9955653 - Disclosure - Financial instruments and risk management - Summary of Derivative Financial Asset and Liabilities Offsetting Arrangements (Details)", "shortName": "Financial instruments and risk management - Summary of Derivative Financial Asset and Liabilities Offsetting Arrangements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "188", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:DerivativeFinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfFinancialInstrumentsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R189": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails", "longName": "9955654 - Disclosure - Financial instruments and risk management - Schedule of Detailed Information About Hedged Items by Risk Category (Details)", "shortName": "Financial instruments and risk management - Schedule of Detailed Information About Hedged Items by Risk Category (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "189", "firstAnchor": { "contextRef": "c-1247", "name": "ifrs-full:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1247", "name": "ifrs-full:AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R190": { "role": "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "longName": "9955655 - Disclosure - Financial instruments and risk management - Fair Value Estimation, Additional Information (Details)", "shortName": "Financial instruments and risk management - Fair Value Estimation, Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "190", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1561", "name": "ifrs-full:ReserveOfCashFlowHedgesContinuingHedges", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R191": { "role": "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "longName": "9955656 - Disclosure - Changes in the Group - Acquisitions (Details)", "shortName": "Changes in the Group - Acquisitions (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "191", "firstAnchor": { "contextRef": "c-1426", "name": "ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1426", "name": "ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R192": { "role": "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "longName": "9955657 - Disclosure - Changes in the Group - Associated undertakings (Details)", "shortName": "Changes in the Group - Associated undertakings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "192", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1572", "name": "ifrs-full:PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R193": { "role": "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "longName": "9955658 - Disclosure - Changes in the Group- Non-controlling Interests (Details)", "shortName": "Changes in the Group- Non-controlling Interests (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "193", "firstAnchor": { "contextRef": "c-1577", "name": "bti:NonControllingInterestPercentageAcquired", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "4", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R194": { "role": "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "longName": "9955659 - Disclosure - Changes in the Group - Assets Held For Sale and Business Disposals (Details)", "shortName": "Changes in the Group - Assets Held For Sale and Business Disposals (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "194", "firstAnchor": { "contextRef": "c-1", "name": "bti:CostsReversalRelatingToAssetsHeldForSale", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-284", "name": "bti:CallOptionsTerm", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R195": { "role": "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "longName": "9955660 - Disclosure - Share-based payments - Additional Information (Details)", "shortName": "Share-based payments - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "195", "firstAnchor": { "contextRef": "c-1", "name": "bti:SharePriceVolatilityCalculationPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:SharePriceVolatilityCalculationPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R196": { "role": "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails", "longName": "9955661 - Disclosure - Share-based payments - Summary of Share-based Payment Expense (Details)", "shortName": "Share-based payments - Summary of Share-based Payment Expense (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "196", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1638", "name": "ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R197": { "role": "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "longName": "9955662 - Disclosure - Share-based payments - Summary of Share-based Payment Liability (Details)", "shortName": "Share-based payments - Summary of Share-based Payment Liability (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "197", "firstAnchor": { "contextRef": "c-1644", "name": "ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1644", "name": "ifrs-full:LiabilitiesFromSharebasedPaymentTransactions2011", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R198": { "role": "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "longName": "9955663 - Disclosure - Share-based payments - Summary of Movements for Equity and Cash-Settled LTIP Scheme (Details)", "shortName": "Share-based payments - Summary of Movements for Equity and Cash-Settled LTIP Scheme (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "198", "firstAnchor": { "contextRef": "c-1656", "name": "ifrs-full:NumberOfOutstandingShareOptions", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "-3", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1620", "name": "ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "-3", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R199": { "role": "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "longName": "9955664 - Disclosure - Share-based payments - Summary of Movements for Equity and Cash-Settled DSBS Scheme (Details)", "shortName": "Share-based payments - Summary of Movements for Equity and Cash-Settled DSBS Scheme (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "199", "firstAnchor": { "contextRef": "c-1667", "name": "ifrs-full:NumberOfOutstandingShareOptions", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "-3", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1626", "name": "ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement", "unitRef": "shares", "xsiNil": "false", "lang": "en-US", "decimals": "-3", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R200": { "role": "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails", "longName": "9955665 - Disclosure - Share-based payments - Valuation Assumptions (Details)", "shortName": "Share-based payments - Valuation Assumptions (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "200", "firstAnchor": { "contextRef": "c-1673", "name": "ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1673", "name": "ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "3", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R201": { "role": "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "longName": "9955666 - Disclosure - Share-based payments - Summary of Valuation Assumptions Used in Models (Details)", "shortName": "Share-based payments - Summary of Valuation Assumptions Used in Models (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "201", "firstAnchor": { "contextRef": "c-1689", "name": "bti:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate1", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1689", "name": "bti:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate1", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R202": { "role": "http://www.bat.com/role/GroupemployeesAdditionalInformationDetails", "longName": "9955667 - Disclosure - Group employees - Additional Information (Details)", "shortName": "Group employees - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "202", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:AverageNumberOfEmployees", "unitRef": "employee", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": null }, "R203": { "role": "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "longName": "9955668 - Disclosure - Group employees - Summary of Average Number of Persons Employed by Group and Associates (Details)", "shortName": "Group employees - Summary of Average Number of Persons Employed by Group and Associates (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "203", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:AverageNumberOfEmployees", "unitRef": "employee", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1699", "name": "ifrs-full:AverageNumberOfEmployees", "unitRef": "employee", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfDetailedInformationAboutAverageNumberOfEmployeesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R204": { "role": "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "longName": "9955669 - Disclosure - Related party disclosures - Additional information (Details)", "shortName": "Related party disclosures - Additional information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "204", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:ParValuePerShare", "unitRef": "gbpPerShare", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1702", "name": "ifrs-full:ParValuePerShare", "unitRef": "inrPerShare", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R205": { "role": "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails", "longName": "9955670 - Disclosure - Related party disclosures - Summary of Transactions Between Related Parties (Details)", "shortName": "Related party disclosures - Summary of Transactions Between Related Parties (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "205", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:RevenueFromSaleOfGoodsRelatedPartyTransactions", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R206": { "role": "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails", "longName": "9955671 - Disclosure - Related party disclosures - Summary of Amounts Incurred by Entity for Provision of Key Management Personnel Services (Details)", "shortName": "Related party disclosures - Summary of Amounts Incurred by Entity for Provision of Key Management Personnel Services (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "206", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R207": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "longName": "9955672 - Disclosure - Contingent liabilities and financial commitments - General Litigation Overview - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - General Litigation Overview - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "207", "firstAnchor": { "contextRef": "c-1", "name": "bti:ProvisionsUnderStateSettlementAgreements", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:ProvisionsUnderStateSettlementAgreements", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R208": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "longName": "9955673 - Disclosure - Contingent liabilities and financial commitments - General Litigation Overview - Schedule of Categories of Tobacco Related Actions Pending Against Group Companies (Details)", "shortName": "Contingent liabilities and financial commitments - General Litigation Overview - Schedule of Categories of Tobacco Related Actions Pending Against Group Companies (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "208", "firstAnchor": { "contextRef": "c-1722", "name": "bti:NumberOfActiveIndividualCases", "unitRef": "case", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCasesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1722", "name": "bti:NumberOfActiveIndividualCases", "unitRef": "case", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCasesExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R209": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "longName": "9955674 - Disclosure - Contingent liabilities and financial commitments - US Tobacco Litigation - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - US Tobacco Litigation - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "209", "firstAnchor": { "contextRef": "c-1782", "name": "bti:LossContingencyClaimForDisgorgement", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-9", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1782", "name": "bti:LossContingencyClaimForDisgorgement", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-9", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R210": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "longName": "9955675 - Disclosure - Contingent liabilities and financial commitments - Engle Class Action and Engle Progeny Cases (Florida) - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Engle Class Action and Engle Progeny Cases (Florida) - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "210", "firstAnchor": { "contextRef": "c-1", "name": "bti:LossContingencyNumberOfPaidJudgementsCases", "unitRef": "case", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1794", "name": "ifrs-full:LossesOnLitigationSettlements", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R211": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "longName": "9955676 - Disclosure - Contingent liabilities and financial commitments - Engle Class Action and Engle Progeny Cases (Florida) (Details)", "shortName": "Contingent liabilities and financial commitments - Engle Class Action and Engle Progeny Cases (Florida) (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "211", "firstAnchor": { "contextRef": "c-1", "name": "bti:LossContingencyNumberOfPaidJudgementsCases", "unitRef": "case", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1807", "name": "ifrs-full:LossesOnLitigationSettlements", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R212": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "longName": "9955677 - Disclosure - Contingent liabilities and financial commitments - Individual Cases - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Individual Cases - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "212", "firstAnchor": { "contextRef": "c-30", "name": "bti:NumberOfIndividualCasesIsBroughtByOrOnBehalfOfAnIndividualSurvivorsAllegingPersonalInjuryAsResultOfExposureToETS", "unitRef": "case", "xsiNil": "false", "lang": "en-US", "decimals": "INF", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1820", "name": "bti:NetAmountAgainstVerdicts", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-5", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R213": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "longName": "9955678 - Disclosure - Contingent liabilities and financial commitments - Summary of Individual Cases (Details)", "shortName": "Contingent liabilities and financial commitments - Summary of Individual Cases (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "213", "firstAnchor": { "contextRef": "c-1804", "name": "bti:LossContingencyNumberOfCasesPending", "unitRef": "case2", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1814", "name": "bti:LossContingencyNumberOfPlaintiffsInCases", "unitRef": "case2", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R214": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "longName": "9955679 - Disclosure - Contingent liabilities and financial commitments - State Settlement Agreements - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - State Settlement Agreements - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "214", "firstAnchor": { "contextRef": "c-1831", "name": "bti:TrustFundRaised", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1831", "name": "bti:TrustFundRaised", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R215": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "longName": "9955680 - Disclosure - Contingent liabilities and financial commitments - Operating Subsidiaries' Expenses and Payments under State Settlement Agreements (Details)", "shortName": "Contingent liabilities and financial commitments - Operating Subsidiaries' Expenses and Payments under State Settlement Agreements (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "215", "firstAnchor": { "contextRef": "c-1", "name": "bti:LitigationSettlementExpenses", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:LitigationSettlementExpenses", "unitRef": "usd", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R216": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "longName": "9955681 - Disclosure - Contingent liabilities and financial commitments - Tobacco-Related Litigation Outside the U.S. - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Tobacco-Related Litigation Outside the U.S. - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "216", "firstAnchor": { "contextRef": "c-569", "name": "bti:CashRetainedForWorkingCapitalNeeds", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1875", "name": "bti:LossContingencyDamagesSoughtByPlaintiffs", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-8", "ancestors": [ "span", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R217": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "longName": "9955682 - Disclosure - Contingent liabilities and financial commitments - Non-Tobacco-Related Litigation - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Non-Tobacco-Related Litigation - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "217", "firstAnchor": { "contextRef": "c-1937", "name": "bti:PercentageOfEnvironmentalCleanUpCostsObligationsCommitment", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1937", "name": "bti:PercentageOfEnvironmentalCleanUpCostsObligationsCommitment", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "2", "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R218": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "longName": "9955683 - Disclosure - Contingent liabilities and financial commitments - Other contingencies - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Other contingencies - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "218", "firstAnchor": { "contextRef": "c-1952", "name": "bti:MonitorshipPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1954", "name": "bti:LossContingencyNumberOfIndemnityCasesPending", "unitRef": "productliabilityaction", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R219": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "longName": "9955684 - Disclosure - Contingent liabilities and financial commitments - Tax Disputes - Additional Information (Details)", "shortName": "Contingent liabilities and financial commitments - Tax Disputes - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "219", "firstAnchor": { "contextRef": "c-1957", "name": "bti:ReassessmentStatuteOfLimitationPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-1957", "name": "bti:ReassessmentStatuteOfLimitationPeriod", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R220": { "role": "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "longName": "9955685 - Disclosure - Contingent liabilities and financial commitments - Schedule of Total Future Minimum Lease Payments under Non-cancellable Operating Leases (Details)", "shortName": "Contingent liabilities and financial commitments - Schedule of Total Future Minimum Lease Payments under Non-cancellable Operating Leases (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "220", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CapitalCommitments", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "c-30", "name": "ifrs-full:CapitalCommitments", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true, "unique": true } }, "R221": { "role": "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "longName": "9955686 - Disclosure - Interests in subsidiaries - Additional Information (Details)", "shortName": "Interests in subsidiaries - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "221", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Goodwill", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1983", "name": "ifrs-full:ProportionOfOwnershipInterestInSubsidiary", "unitRef": "number", "xsiNil": "false", "lang": "en-US", "decimals": "4", "ancestors": [ "ifrs-full:ProportionOfOwnershipInterestInSubsidiary", "ifrs-full:ProportionOfOwnershipInterestInSubsidiary", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R222": { "role": "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "longName": "9955687 - Disclosure - Interests in subsidiaries - Summary of Financial Information of Subsidiaries with Material Non-controlling Interests (Details)", "shortName": "Interests in subsidiaries - Summary of Financial Information of Subsidiaries with Material Non-controlling Interests (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "222", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1983", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R223": { "role": "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "longName": "9955688 - Disclosure - Interests in subsidiaries - Summary of Financial Information of Subsidiaries Subject to Significant Restrictions (Details)", "shortName": "Interests in subsidiaries - Summary of Financial Information of Subsidiaries Subject to Significant Restrictions (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "223", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:NoncurrentAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-965", "name": "ifrs-full:NoncurrentAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R224": { "role": "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "longName": "9955689 - Disclosure - Interests in subsidiaries - Summary of Breakdown of Current Assets (Details)", "shortName": "Interests in subsidiaries - Summary of Breakdown of Current Assets (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "224", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:CashAndCashEquivalents", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-965", "name": "ifrs-full:Inventories", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R225": { "role": "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails", "longName": "9955690 - Disclosure - Sustainability costs - Disclosure of Sustainability Costs (Details)", "shortName": "Sustainability costs - Disclosure of Sustainability Costs (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "225", "firstAnchor": { "contextRef": "c-1", "name": "bti:RecyclingAndWasteCosts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1", "name": "bti:SevereWeatherEventsAndOtherNaturalConditionsCosts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfSustainabilityCostsTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R226": { "role": "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails", "longName": "9955691 - Disclosure - Sustainability costs - Additional information (Details)", "shortName": "Sustainability costs - Additional information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "226", "firstAnchor": { "contextRef": "c-1", "name": "bti:RecyclingAndWasteCosts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-1990", "name": "bti:ImpairmentAndRepairCosts", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R227": { "role": "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "longName": "9955692 - Disclosure - Summarised financial information - Additional Information (Details)", "shortName": "Summarised financial information - Additional Information (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "227", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:BondsIssued", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-2049", "name": "bti:NumberOfPerpetualHybridBondsIssued", "unitRef": "bond", "xsiNil": "false", "lang": "en-US", "decimals": "0", "ancestors": [ "span", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R228": { "role": "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "longName": "9955693 - Disclosure - Summarised financial information - Summarised Financial Information of Income Statement (Details)", "shortName": "Summarised financial information - Summarised Financial Information of Income Statement (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "228", "firstAnchor": { "contextRef": "c-1", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-2001", "name": "ifrs-full:Revenue", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCondensedConsolidatedIncomeStatementExplanatoryTableTextBlock", "div", "div", "ix:continuation", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R229": { "role": "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "longName": "9955694 - Disclosure - Summarised financial information - Summarised Financial Information of Balance Sheet (Details)", "shortName": "Summarised financial information - Summarised Financial Information of Balance Sheet (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "229", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:NoncurrentAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-2025", "name": "ifrs-full:NoncurrentAssets", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "bti:DisclosureOfCondensedConsolidatedBalanceSheetExplanatoryTableTextBlock", "div", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } }, "R230": { "role": "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails", "longName": "9955695 - Disclosure - Summarised financial information - Summary of Unconsolidated Equity Results (Details)", "shortName": "Summarised financial information - Summary of Unconsolidated Equity Results (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "230", "firstAnchor": { "contextRef": "c-30", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "first": true }, "uniqueAnchor": { "contextRef": "c-2050", "name": "ifrs-full:Equity", "unitRef": "gbp", "xsiNil": "false", "lang": "en-US", "decimals": "-6", "ancestors": [ "span", "span", "div", "div", "div", "td", "tr", "tbody", "table", "div", "div", "div", "ix:continuation", "ix:continuation", "div", "div", "body", "html" ], "reportCount": 1, "baseRef": "bti-20241231.htm", "unique": true } } }, "tag": { "country_AO": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "AO", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Angola", "label": "ANGOLA" } } }, "auth_ref": [] }, "currency_AOA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "AOA", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Angola, Kwanza", "label": "Angola, Kwanza" } } }, "auth_ref": [] }, "country_AR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "AR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Argentina", "label": "ARGENTINA" } } }, "auth_ref": [] }, "currency_ARS": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "ARS", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Argentina, Pesos", "label": "Argentina, Pesos" } } }, "auth_ref": [] }, "country_AU": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "AU", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Australia", "label": "AUSTRALIA" } } }, "auth_ref": [] }, "bti_AccountingFirmsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AccountingFirmsMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Accounting firms", "label": "Accounting Firms [Member]", "documentation": "Accounting firms." } } }, "auth_ref": [] }, "ifrs-full_AccountingProfit": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AccountingProfit", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Profit before tax excluding associates and joint ventures", "label": "Accounting profit" } }, "en": { "role": { "documentation": "The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r65", "r66" ] }, "bti_AccrualAndDeferredIncomeExcludingFIIGLO": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AccrualAndDeferredIncomeExcludingFIIGLO", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Accrued charges and deferred income", "label": "Accrual And Deferred Income Excluding FII GLO", "documentation": "Accrual and deferred income, excluding FII GLO." } } }, "auth_ref": [] }, "bti_AccruedIncomeInRelationToRebates": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AccruedIncomeInRelationToRebates", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Prepayments and accrued income", "label": "Accrued Income In Relation To Rebates", "documentation": "Accrued income in relation to rebates." } } }, "auth_ref": [] }, "bti_AccumulatedAmountOfFairValueHedgeAdjustmentsIncludedInBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AccumulatedAmountOfFairValueHedgeAdjustmentsIncludedInBorrowings", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Accumulated amount of fair value hedge adjustments on the hedged item included in the carrying amount of the hedged item", "label": "Accumulated Amount Of Fair Value Hedge Adjustments Included In Borrowings", "documentation": "Accumulated amount of fair value hedge adjustments included in borrowings." } } }, "auth_ref": [] }, "bti_AccumulatedBalancePreferenceSharesConverted2004": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AccumulatedBalancePreferenceSharesConverted2004", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Accumulated balance preference shares converted 2004 relating to Rothmans transactions", "label": "Accumulated Balance Preference Shares Converted2004", "documentation": "Accumulated balance preference shares converted 2004." } } }, "auth_ref": [] }, "ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AccumulatedDepreciationAmortisationAndImpairmentMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Accumulated amortisation and impairment", "terseLabel": "Accumulated depreciation and impairment", "label": "Accumulated depreciation, amortisation and impairment [member]" } }, "en": { "role": { "documentation": "This member stands for accumulated depreciation, amortisation and impairment. [Refer: Impairment loss; Depreciation and amortisation expense]" } } }, "auth_ref": [ "r77", "r83", "r167", "r183", "r186" ] }, "ifrs-full_AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AccumulatedFairValueHedgeAdjustmentOnHedgedItemIncludedInCarryingAmountLiabilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Carrying amount of the hedged item", "label": "Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities" } }, "en": { "role": { "documentation": "The accumulated amount of fair value hedge adjustment on a hedged item that is included in the carrying amount of the hedged item, recognised in the statement of financial position as a liability. [Refer: Hedged items [domain]]" } } }, "auth_ref": [ "r297" ] }, "ifrs-full_AccumulatedImpairmentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AccumulatedImpairmentMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Allowance", "verboseLabel": "Accumulated impairment", "label": "Accumulated impairment [member]" } }, "en": { "role": { "documentation": "This member stands for accumulated impairment. [Refer: Impairment loss]" } } }, "auth_ref": [ "r283", "r310", "r447", "r592", "r609", "r615", "r616" ] }, "bti_AcquisitionOfBusiness1998": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AcquisitionOfBusiness1998", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BAT Plc acquisition of BAT Industries 1998", "label": "Acquisition Of Business1998", "documentation": "Acquisition of business 1998." } } }, "auth_ref": [] }, "ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AcquisitiondateFairValueOfTotalConsiderationTransferred", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value total", "label": "Consideration transferred, acquisition-date fair value" } }, "en": { "role": { "documentation": "The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Total for all business combinations [member]]" } } }, "auth_ref": [ "r275" ] }, "ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 separately acquired", "label": "Acquisitions through business combinations, intangible assets and goodwill" } }, "en": { "role": { "documentation": "The increase in intangible assets and goodwill resulting from acquisitions through business combinations. [Refer: Total for all business combinations [member]; Intangible assets and goodwill]" } } }, "auth_ref": [ "r610" ] }, "bti_ActiveMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ActiveMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Active members", "label": "Active [Member]", "documentation": "Active members." } } }, "auth_ref": [] }, "ifrs-full_ActuarialAssumptionOfDiscountRates": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfDiscountRates", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Discount rate (%)", "label": "Actuarial assumption of discount rates" } }, "en": { "role": { "documentation": "The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r598" ] }, "ifrs-full_ActuarialAssumptionOfDiscountRatesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfDiscountRatesMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Discount rate", "label": "Actuarial assumption of discount rates [member]" } }, "en": { "role": { "documentation": "This member stands for the discount rates used as actuarial assumptions. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r599" ] }, "ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfExpectedRatesOfInflation", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "General inflation (%)", "label": "Actuarial assumption of expected rates of inflation" } }, "en": { "role": { "documentation": "The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r598" ] }, "ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflationMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfExpectedRatesOfInflationMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rate of inflation", "label": "Actuarial assumption of expected rates of inflation [member]" } }, "en": { "role": { "documentation": "This member stands for the expected rates of inflation used as actuarial assumptions. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r599" ] }, "ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfExpectedRatesOfPensionIncreases", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rate of increase in deferred pensions (%)", "label": "Actuarial assumption of expected rates of pension increases" } }, "en": { "role": { "documentation": "The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r598" ] }, "bti_ActuarialAssumptionOfExpectedRatesOfPensionPaymentIncreases": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ActuarialAssumptionOfExpectedRatesOfPensionPaymentIncreases", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rate of increase in pensions in payment (%)", "label": "Actuarial Assumption Of Expected Rates Of Pension Payment Increases", "documentation": "Actuarial assumption of expected rates of pension payment increases." } } }, "auth_ref": [] }, "ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfExpectedRatesOfSalaryIncreases", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rate of increase in salaries (%)", "label": "Actuarial assumption of expected rates of salary increases" } }, "en": { "role": { "documentation": "The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r598" ] }, "ifrs-full_ActuarialAssumptionOfLifeExpectancyAfterRetirementMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfLifeExpectancyAfterRetirementMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Life expectancy", "label": "Actuarial assumption of life expectancy after retirement [member]" } }, "en": { "role": { "documentation": "This member stands for the life expectancy after retirement used as actuarial assumptions. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r599" ] }, "ifrs-full_ActuarialAssumptionOfMedicalCostTrendRatesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionOfMedicalCostTrendRatesMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Healthcare inflation", "label": "Actuarial assumption of medical cost trend rates [member]" } }, "en": { "role": { "documentation": "This member stands for the medical cost trend rates used as actuarial assumptions. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r599" ] }, "ifrs-full_ActuarialAssumptionsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionsAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Actuarial assumptions [axis]", "label": "Actuarial assumptions [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r99" ] }, "ifrs-full_ActuarialAssumptionsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialAssumptionsDomain", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Actuarial assumptions [domain]", "label": "Actuarial assumptions [domain]" } }, "en": { "role": { "documentation": "This member stands for all actuarial assumptions. Actuarial assumptions are the entity\u2019s unbiased and mutually compatible best estimates of the demographic and financial variables that will determine the ultimate cost of providing post-employment benefits. It also represents the standard value for the 'Actuarial assumptions' axis if no other member is used." } } }, "auth_ref": [ "r99" ] }, "ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Actuarial losses/(gains) arising from changes in demographic assumptions", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions" } }, "en": { "role": { "documentation": "The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r91" ] }, "ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Actuarial losses/(gains)arising from changes in financial assumptions", "terseLabel": "Actuarial (losses)/gains", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions" } }, "en": { "role": { "documentation": "The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r92" ] }, "ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Experience losses/(gains)", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments" } }, "en": { "role": { "documentation": "The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r596" ] }, "ecd_Additional402vDisclosureTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "Additional402vDisclosureTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Additional 402(v) Disclosure [Text Block]", "terseLabel": "Additional 402(v) Disclosure" } } }, "auth_ref": [ "r511" ] }, "bti_AdditionalProvisionsNetOfReversalOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdditionalProvisionsNetOfReversalOtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provided in respect of the year", "label": "Additional Provisions, Net of Reversal, Other Provisions", "documentation": "Additional Provisions, Net of Reversal, Other Provisions" } } }, "auth_ref": [] }, "ifrs-full_AdditionalProvisionsOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdditionalProvisionsOtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Other provisions", "terseLabel": "Additional provisions, other provisions", "label": "Additional provisions, other provisions" } }, "en": { "role": { "documentation": "The amount of additional other provisions made. [Refer: Other provisions]" } } }, "auth_ref": [ "r159" ] }, "bti_AdditionsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdditionsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additions", "label": "Additions Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Additions of investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 internal development", "label": "Additions other than through business combinations, intangible assets other than goodwill" } }, "en": { "role": { "documentation": "The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Intangible assets other than goodwill]" } } }, "auth_ref": [ "r168" ] }, "ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additions", "label": "Additions other than through business combinations, property, plant and equipment" } }, "en": { "role": { "documentation": "The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment]" } } }, "auth_ref": [ "r78" ] }, "ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additions", "label": "Additions other than through business combinations, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The amount of additions to property, plant and equipment including right-of-use assets other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "bti_AdditonToEstimatedFinancialEffectOfContingentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdditonToEstimatedFinancialEffectOfContingentLiabilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additon to estimated effect of contingent liabilities", "label": "Additon To Estimated Financial Effect Of Contingent Liabilities", "documentation": "Additon To Estimated Financial Effect Of Contingent Liabilities" } } }, "auth_ref": [] }, "dei_AddressTypeDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AddressTypeDomain", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Address Type [Domain]", "label": "Address Type [Domain]", "documentation": "An entity may have several addresses for different purposes and this domain represents all such types." } } }, "auth_ref": [] }, "ecd_AdjToCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AdjToCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Adjustment to Compensation Amount", "terseLabel": "Adjustment to Compensation, Amount" } } }, "auth_ref": [ "r524" ] }, "ecd_AdjToCompAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AdjToCompAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Adjustment to Compensation [Axis]", "terseLabel": "Adjustment to Compensation:" } } }, "auth_ref": [ "r524" ] }, "ecd_AdjToNonPeoNeoCompFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AdjToNonPeoNeoCompFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Adjustment to Non-PEO NEO Compensation Footnote [Text Block]", "terseLabel": "Adjustment to Non-PEO NEO Compensation Footnote" } } }, "auth_ref": [ "r524" ] }, "ecd_AdjToPeoCompFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AdjToPeoCompFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Adjustment To PEO Compensation, Footnote [Text Block]", "terseLabel": "Adjustment To PEO Compensation, Footnote" } } }, "auth_ref": [ "r524" ] }, "bti_AdjustedAtConstantRatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedAtConstantRatesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted at constant rates", "label": "Adjusted At Constant Rates [Member]", "documentation": "Adjusted at constant rates." } } }, "auth_ref": [] }, "bti_AdjustedAtCurrentRatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedAtCurrentRatesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted at current rates", "label": "Adjusted At Current Rates [Member]", "documentation": "Adjusted at current rates." } } }, "auth_ref": [] }, "bti_AdjustedBasicEarningsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedBasicEarningsAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted Basic Earnings [Abstract]", "label": "Adjusted Basic Earnings [Abstract]", "documentation": "Adjusted Basic Earnings" } } }, "auth_ref": [] }, "bti_AdjustedBasicEarningsPerShare": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedBasicEarningsPerShare", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Adjusted (loss)/earnings per share (basic) (GBP per share)", "label": "Adjusted Basic Earnings Per Share", "documentation": "Adjusted basic earnings per share." } } }, "auth_ref": [] }, "bti_AdjustedBasicEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedBasicEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted Basic Earnings Per Share [Abstract]", "label": "Adjusted Basic Earnings Per Share [Abstract]", "documentation": "Adjusted earnings per share." } } }, "auth_ref": [] }, "bti_AdjustedDilutedEarningsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedDilutedEarningsAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted Diluted Earnings [Abstract]", "label": "Adjusted Diluted Earnings [Abstract]", "documentation": "Adjusted Diluted Earnings" } } }, "auth_ref": [] }, "bti_AdjustedDilutedEarningsPerShare": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedDilutedEarningsPerShare", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Adjusted (loss)/earnings per share (diluted) (GBP per share)", "label": "Adjusted Diluted Earnings Per Share", "documentation": "Adjusted diluted earnings per share." } } }, "auth_ref": [] }, "bti_AdjustedDilutedEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedDilutedEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusted Diluted Earnings Per Share [Abstract]", "label": "Adjusted Diluted Earnings Per Share [Abstract]", "documentation": "Adjusted Diluted Earnings Per Share" } } }, "auth_ref": [] }, "bti_AdjustedEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Adjusted (loss)/earnings (basic)", "label": "Adjusted Earnings Basic", "documentation": "Adjusted earnings basic." } } }, "auth_ref": [] }, "bti_AdjustedEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Adjusted (loss)/earnings (diluted)", "label": "Adjusted Earnings Diluted", "documentation": "Adjusted earnings diluted." } } }, "auth_ref": [] }, "bti_AdjustedEarningsPerShareExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustedEarningsPerShareExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/EarningspershareTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Adjusted Earnings Per Share", "label": "Adjusted Earnings Per Share Explanatory [Table Text Block]", "documentation": "Adjusted earnings per share." } } }, "auth_ref": [] }, "ifrs-full_AdjustedWeightedAverageShares": { "xbrltype": "sharesItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustedWeightedAverageShares", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Diluted earnings/(loss) per share, Weighted average number of shares (in shares)", "label": "Weighted average number of ordinary shares used in calculating diluted earnings per share" } }, "en": { "role": { "documentation": "The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]" } } }, "auth_ref": [ "r138" ] }, "bti_AdjustingItemsIncludedInTaxation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustingItemsIncludedInTaxation", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusting items in tax", "label": "Adjusting Items Included In Taxation", "documentation": "Adjusting Items Included In Taxation" } } }, "auth_ref": [] }, "bti_AdjustingItemsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustingItemsMember", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusting items", "label": "Adjusting Items [Member]", "documentation": "Adjusting items." } } }, "auth_ref": [] }, "bti_AdjustingItemsWhichHaveBeenAdjustedWithinNetFinanceCostsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustingItemsWhichHaveBeenAdjustedWithinNetFinanceCostsMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusting items \u200bwhich \u200bhave \u200bbeen \u200badjusted \u200bwithin net finance costs", "label": "Adjusting Items Which Have Been Adjusted Within Net Finance Costs [Member]", "documentation": "Adjusting items which have been adjusted within net finance costs." } } }, "auth_ref": [] }, "ifrs-full_AdjustmentsForCurrentTaxOfPriorPeriod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForCurrentTaxOfPriorPeriod", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 adjustments in respect of prior periods", "verboseLabel": "Adjustments in respect of prior periods", "label": "Adjustments for current tax of prior periods" } }, "en": { "role": { "documentation": "Adjustments of tax expense (income) recognised in the period for current tax of prior periods." } } }, "auth_ref": [ "r390" ] }, "ifrs-full_AdjustmentsForDecreaseIncreaseInInventories": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForDecreaseIncreaseInInventories", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 decrease/(increase) in inventories", "label": "Adjustments for decrease (increase) in inventories" } }, "en": { "role": { "documentation": "Adjustments for decrease (increase) in inventories to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Inventories; Profit (loss)]" } } }, "auth_ref": [ "r619" ] }, "bti_AdjustmentsForDecreaseIncreaseInProvisionForMasterSettlementAgreement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustmentsForDecreaseIncreaseInProvisionForMasterSettlementAgreement", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 decrease in Master Settlement Agreement payable", "label": "Adjustments For Decrease (Increase) In Provision For Master Settlement Agreement", "documentation": "Adjustments for decrease increase in master settlement agreement." } } }, "auth_ref": [] }, "ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 increase in trade and other receivables", "label": "Adjustments for decrease (increase) in trade and other receivables" } }, "en": { "role": { "documentation": "Adjustments for decrease (increase) in trade and other receivables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other receivables; Profit (loss)]" } } }, "auth_ref": [ "r621" ] }, "ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 depreciation, amortisation and impairment costs", "label": "Adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss" } }, "en": { "role": { "documentation": "Adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Impairment loss; Depreciation and amortisation expense; Impairment loss (reversal of impairment loss) recognised in profit or loss; Profit (loss)]" } } }, "auth_ref": [ "r621" ] }, "ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementManagementofFinancialRisksAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjustments for gains (losses) on change in fair value of derivatives", "label": "Adjustments for gains (losses) on change in fair value of derivatives" } }, "en": { "role": { "documentation": "Adjustments for gains (losses) on changes in the fair value of derivatives to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: At fair value [member]; Derivatives [member]; Profit (loss)]" } } }, "auth_ref": [ "r621" ] }, "ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 decrease in net retirement benefit liabilities", "label": "Adjustments for increase (decrease) in employee benefit liabilities" } }, "en": { "role": { "documentation": "Adjustments for increase (decrease) in employee benefit liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r621" ] }, "bti_AdjustmentsForIncreaseDecreaseInOtherProvisionsForLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustmentsForIncreaseDecreaseInOtherProvisionsForLiabilities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 increase/(decrease) in other provisions for liabilities", "label": "Adjustments For Increase (Decrease) In Other Provisions For Liabilities", "documentation": "Adjustments For Increase (Decrease) In Other Provisions For Liabilities" } } }, "auth_ref": [] }, "ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 increase in trade and other payables", "verboseLabel": "Increase in trade and other payables", "negatedTerseLabel": "Adjustments for increase (decrease) in trade and other payables", "label": "Adjustments for increase (decrease) in trade and other payables" } }, "en": { "role": { "documentation": "Adjustments for increase (decrease) in trade and other payables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other payables; Profit (loss)]" } } }, "auth_ref": [ "r621" ] }, "ifrs-full_AdjustmentsForReconcileProfitLossAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsForReconcileProfitLossAbstract", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Adjustments for", "label": "Adjustments to reconcile profit (loss) [abstract]" } } }, "auth_ref": [] }, "ifrs-full_AdjustmentsToReconcileProfitLossToNumeratorUsedInCalculatingBasicEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AdjustmentsToReconcileProfitLossToNumeratorUsedInCalculatingBasicEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjustments to reconcile profit (loss) to numerator used in calculating basic earnings per share [abstract]", "label": "Adjustments to reconcile profit (loss) to numerator used in calculating basic earnings per share [abstract]" } } }, "auth_ref": [] }, "bti_AdjustmentsToReconcileProfitLossToNumeratorUsedInCalculatingDilutedEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AdjustmentsToReconcileProfitLossToNumeratorUsedInCalculatingDilutedEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjustments to reconcile profit (loss) to numerator used in calculating diluted earnings per share [Abstract]", "label": "Adjustments To Reconcile Profit (Loss) To Numerator Used In Calculating Diluted Earnings Per Share [Abstract]", "documentation": "Adjustments To Reconcile Profit (Loss) To Numerator Used In Calculating Diluted Earnings Per Share" } } }, "auth_ref": [] }, "bti_AggregateCompanyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AggregateCompanyMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total Company", "label": "Aggregate Company [Member]", "documentation": "Aggregate company." } } }, "auth_ref": [] }, "ecd_AggtChngPnsnValInSummryCompstnTblForAplblYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AggtChngPnsnValInSummryCompstnTblForAplblYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]", "terseLabel": "Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table" } } }, "auth_ref": [ "r569" ] }, "ecd_AggtErrCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AggtErrCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Aggregate Erroneous Compensation Amount", "terseLabel": "Aggregate Erroneous Compensation Amount" } } }, "auth_ref": [ "r482", "r493", "r503", "r536" ] }, "ecd_AggtErrCompNotYetDeterminedTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AggtErrCompNotYetDeterminedTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Aggregate Erroneous Compensation Not Yet Determined [Text Block]", "terseLabel": "Aggregate Erroneous Compensation Not Yet Determined" } } }, "auth_ref": [ "r485", "r496", "r506", "r539" ] }, "ecd_AggtPnsnAdjsSvcCstMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AggtPnsnAdjsSvcCstMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Aggregate Pension Adjustments Service Cost [Member]", "terseLabel": "Aggregate Pension Adjustments Service Cost" } } }, "auth_ref": [ "r570" ] }, "bti_AlNaghiMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AlNaghiMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Al Naghi", "label": "Al Naghi [Member]", "documentation": "Al Naghi." } } }, "auth_ref": [] }, "bti_AliBinAliEstablishmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AliBinAliEstablishmentMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ali Bin Ali establishment", "label": "Ali Bin Ali Establishment [Member]", "documentation": "Ali Bin Ali Establishment." } } }, "auth_ref": [] }, "ecd_AllAdjToCompMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AllAdjToCompMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "All Adjustments to Compensation [Member]", "terseLabel": "All Adjustments to Compensation" } } }, "auth_ref": [ "r524" ] }, "currency_AllCurrenciesDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "AllCurrenciesDomain", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "All Currencies [Domain]", "label": "All Currencies [Domain]" } } }, "auth_ref": [] }, "ecd_AllExecutiveCategoriesMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AllExecutiveCategoriesMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "All Executive Categories [Member]", "terseLabel": "All Executive Categories" } } }, "auth_ref": [ "r531" ] }, "ecd_AllIndividualsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AllIndividualsMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure", "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure", "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements", "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "All Individuals [Member]", "terseLabel": "All Individuals" } } }, "auth_ref": [ "r486", "r497", "r507", "r531", "r540", "r544", "r552" ] }, "bti_AllOtherCountriesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AllOtherCountriesMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "All other countries", "label": "All Other Countries [Member]", "documentation": "All other countries." } } }, "auth_ref": [] }, "ecd_AllTradingArrangementsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AllTradingArrangementsMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "All Trading Arrangements [Member]", "terseLabel": "All Trading Arrangements" } } }, "auth_ref": [ "r550" ] }, "bti_AllocatedPercentageOfFundToReturnSeekingAssets": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AllocatedPercentageOfFundToReturnSeekingAssets", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of return-seeking assets scheme", "label": "Allocated Percentage Of Fund To Return Seeking Assets", "documentation": "Allocated percentage of fund to return seeking assets." } } }, "auth_ref": [] }, "bti_AllocatedPercentageOfFundToRiskReducingAssets": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AllocatedPercentageOfFundToRiskReducingAssets", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of risk-reducing assets scheme", "label": "Allocated Percentage Of Fund To Risk Reducing Assets", "documentation": "Allocated percentage of fund to risk reducing assets." } } }, "auth_ref": [] }, "bti_AltriaClientServicesLLCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AltriaClientServicesLLCMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Altria Client Services LLC", "label": "Altria Client Services LLC [Member]", "documentation": "Altria Client Services LLC" } } }, "auth_ref": [] }, "dei_AmendmentFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AmendmentFlag", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Amendment Flag", "label": "Amendment Flag", "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission." } } }, "auth_ref": [] }, "bti_AmericanDepositarySharesEvidencedByAmericanDepositaryReceiptsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmericanDepositarySharesEvidencedByAmericanDepositaryReceiptsMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "American Depositary Shares (evidenced by American Depositary Receipts)", "label": "American Depositary Shares Evidenced By American Depositary Receipts [Member]", "documentation": "American depositary shares evidenced by american depositary receipts." } } }, "auth_ref": [] }, "bti_AmericasAndEuropeSegmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmericasAndEuropeSegmentMember", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "AME", "label": "Americas and Europe Segment [Member]", "documentation": "Americas and Europe Segment" } } }, "auth_ref": [] }, "ifrs-full_AmortisationExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AmortisationExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amortisation of acquired intangibles", "label": "Amortisation expense" } }, "en": { "role": { "documentation": "The amount of amortisation expense. Amortisation is the systematic allocation of depreciable amounts of intangible assets over their useful lives." } } }, "auth_ref": [ "r578" ] }, "ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AmortisationIntangibleAssetsOtherThanGoodwill", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Amortisation charge", "label": "Amortisation, intangible assets other than goodwill" } }, "en": { "role": { "documentation": "The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill]" } } }, "auth_ref": [ "r169" ] }, "bti_AmountClaimedByContractorOnContractualDispute": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountClaimedByContractorOnContractualDispute", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount claimed by contractor on contractual dispute", "label": "Amount Claimed By Contractor On Contractual Dispute", "documentation": "Amount claimed by contractor on contractual dispute." } } }, "auth_ref": [] }, "bti_AmountOfClaimAgainstDamagesRelatedToLitigation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountOfClaimAgainstDamagesRelatedToLitigation", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount of claim against damages related to litigation", "label": "Amount Of Claim Against Damages Related To Litigation", "documentation": "Amount of claim against damages related to litigation." } } }, "auth_ref": [] }, "bti_AmountOfDamagesClaimed": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountOfDamagesClaimed", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount of damages claimed", "label": "Amount Of Damages Claimed", "documentation": "Amount of damages claimed." } } }, "auth_ref": [] }, "bti_AmountOfDamagesRelatedToLitigation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountOfDamagesRelatedToLitigation", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount of damages related to litigation", "label": "Amount Of Damages Related To Litigation", "documentation": "Amount of damages related to litigation." } } }, "auth_ref": [] }, "bti_AmountOfDamagesRelatedToLitigationIncludingCourtSupplement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountOfDamagesRelatedToLitigationIncludingCourtSupplement", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount of damages related to litigation incl supplement", "label": "Amount Of Damages Related To Litigation Including Court Supplement", "documentation": "Amount Of Damages Related To Litigation Including Court Supplement" } } }, "auth_ref": [] }, "bti_AmountOfLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountOfLitigationSettlement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount ordered by court", "label": "Amount Of Litigation Settlement", "documentation": "Amount of litigation settlement." } } }, "auth_ref": [] }, "bti_AmountPaidForAttorneysFeesAndStatutoryInterest": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountPaidForAttorneysFeesAndStatutoryInterest", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount paid for attorneys fees and statutory interest", "label": "Amount Paid For Attorneys Fees And Statutory Interest", "documentation": "Amount paid for attorneys fees and statutory interest." } } }, "auth_ref": [] }, "bti_AmountPaidForCompensatoryAndPunitiveDamages": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountPaidForCompensatoryAndPunitiveDamages", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment for compensatory and punitive damages", "label": "Amount Paid For Compensatory And Punitive Damages", "documentation": "Amount paid for compensatory and punitive damages." } } }, "auth_ref": [] }, "bti_AmountRecognisedInIncomeStatementForPensionAndRetirementBenefitCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AmountRecognisedInIncomeStatementForPensionAndRetirementBenefitCosts", "crdr": "debit", "calculation": { "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails": { "parentTag": "ifrs-full_EmployeeBenefitsExpense", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other pension and retirement benefit costs", "totalLabel": "Total amount recognised in the income statement", "label": "Amount Recognised In Income Statement For Pension And Retirement Benefit Costs", "documentation": "Amount recognised in income statement for pension and retirement benefit costs." } } }, "auth_ref": [] }, "ifrs-full_AmountRemovedFromReserveOfCashFlowHedgesAndIncludedInInitialCostOrOtherCarryingAmountOfNonfinancialAssetLiabilityOrFirmCommitmentForWhichFairValueHedgeAccountingIsApplied": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AmountRemovedFromReserveOfCashFlowHedgesAndIncludedInInitialCostOrOtherCarryingAmountOfNonfinancialAssetLiabilityOrFirmCommitmentForWhichFairValueHedgeAccountingIsApplied", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Cash flow hedges reclassified and reported in total assets", "label": "Amount removed from reserve of cash flow hedges and included in initial cost or other carrying amount of non-financial asset (liability) or firm commitment for which fair value hedge accounting is applied" } }, "en": { "role": { "documentation": "The amount removed from reserve of cash flow hedges and included in the initial cost or other carrying amount of a non-financial asset (liability) or a firm commitment for which fair value hedge accounting is applied. [Refer: Reserve of cash flow hedges]" } } }, "auth_ref": [ "r305", "r346" ] }, "ifrs-full_AmountsPayableRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AmountsPayableRelatedPartyTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Amounts payable at 31 December", "label": "Amounts payable, related party transactions" } }, "en": { "role": { "documentation": "The amounts payable resulting from related party transactions. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r118", "r124" ] }, "ifrs-full_AmountsReceivableRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AmountsReceivableRelatedPartyTransactions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts receivable at 31 December", "label": "Amounts receivable, related party transactions" } }, "en": { "role": { "documentation": "The amounts receivable resulting from related party transactions. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r118", "r124" ] }, "ifrs-full_AnalysisOfIncomeAndExpenseAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AnalysisOfIncomeAndExpenseAbstract", "lang": { "en-us": { "role": { "label": "Analysis of income and expense [abstract]" } } }, "auth_ref": [] }, "bti_AnnualPaymentsPercentageOfNetIncomeAfterTaxes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AnnualPaymentsPercentageOfNetIncomeAfterTaxes", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Annual payments, percentage of net income after taxes", "label": "Annual Payments, Percentage Of Net Income After Taxes", "documentation": "Annual Payments, Percentage Of Net Income After Taxes" } } }, "auth_ref": [] }, "ifrs-full_ApplicableTaxRate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ApplicableTaxRate", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Tax at 25% (2023: 23.5%; 2022: 19%) on the above", "terseLabel": "Corporation tax rate", "label": "Applicable tax rate" } }, "en": { "role": { "documentation": "The applicable income tax rate." } } }, "auth_ref": [ "r66" ] }, "bti_AsbestosLitigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AsbestosLitigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Asbestos litigation", "label": "Asbestos Litigation [Member]", "documentation": "Asbestos Litigation" } } }, "auth_ref": [] }, "bti_AsiaPacificMiddleEastAndAfricaSegmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AsiaPacificMiddleEastAndAfricaSegmentMember", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "APMEA", "label": "Asia Pacific, Middle East And Africa Segment [Member]", "documentation": "Asia Pacific, Middle East And Africa Segment" } } }, "auth_ref": [] }, "ifrs-full_Assets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Assets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "totalLabel": "Total assets", "label": "Assets" } }, "en": { "role": { "documentation": "The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits." } } }, "auth_ref": [ "r23", "r230", "r231", "r233", "r333", "r337" ] }, "ifrs-full_AssetsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AssetsAbstract", "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Assets", "label": "Assets [abstract]" } } }, "auth_ref": [] }, "bti_AssetsAcquiredAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssetsAcquiredAtFairValue", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Fair value of net assets acquired", "label": "Assets Acquired, At Fair Value", "documentation": "Fair value of assets acquired." } } }, "auth_ref": [] }, "ifrs-full_AssetsOfBenefitPlan": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AssetsOfBenefitPlan", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets of benefit plan", "label": "Assets of benefit plan" } }, "en": { "role": { "documentation": "The amount of assets held by retirement benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r126" ] }, "bti_AssociatesAndJointVenturesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssociatesAndJointVenturesMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associates and JVs", "label": "Associates And Joint Ventures [Member]", "documentation": "Associates and joint ventures." } } }, "auth_ref": [] }, "ifrs-full_AssociatesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AssociatesMember", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associates", "label": "Total for all associates [member]" } }, "en": { "role": { "documentation": "This member stands for the entities over which the investor has significant influence." } } }, "auth_ref": [ "r122", "r131", "r133", "r228" ] }, "bti_AssumptionsDecreaseInLongTermGrowthRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssumptionsDecreaseInLongTermGrowthRate", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Assumptions decrease in long term growth rate", "label": "Assumptions Decrease In Long Term Growth Rate", "documentation": "Assumptions Decrease In Long Term Growth Rate" } } }, "auth_ref": [] }, "bti_AssumptionsDecreaseInVolumeYearOnYearInTheDiscretePeriodRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssumptionsDecreaseInVolumeYearOnYearInTheDiscretePeriodRate", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Assumptions decrease in volume year on year in the discrete period by an additional", "label": "Assumptions Decrease In Volume Year On Year In the Discrete Period, Rate", "documentation": "Assumptions Decrease In Volume Year On Year In the Discrete Period, Rate" } } }, "auth_ref": [] }, "bti_AssumptionsDecreaseInVolumeYearOnYearPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssumptionsDecreaseInVolumeYearOnYearPeriod", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assumptions decrease in volume year on year, period", "label": "Assumptions Decrease In Volume Year On Year, Period", "documentation": "Assumptions Decrease In Volume Year On Year, Period" } } }, "auth_ref": [] }, "bti_AssumptionsIncreaseInPreTaxDiscountRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AssumptionsIncreaseInPreTaxDiscountRate", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assumptions increase in pre-tax discount rate", "label": "Assumptions Increase In Pre Tax Discount Rate", "documentation": "Assumptions increase in pre-tax discount rate." } } }, "auth_ref": [] }, "ifrs-full_AtFairValueMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AtFairValueMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "At fair value", "label": "At fair value [member]" } }, "en": { "role": { "documentation": "This member stands for measurement based on fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date." } } }, "auth_ref": [ "r181", "r185", "r212", "r230" ] }, "bti_AttorneyFeePayment": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AttorneyFeePayment", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Attorney fee payment", "label": "Attorney Fee Payment", "documentation": "Attorney fee payment." } } }, "auth_ref": [] }, "ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AttributionOfExpensesByNatureToTheirFunctionAxis", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Attribution of expenses by nature to their function [axis]", "label": "Attribution of expenses by nature to their function [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r575", "r578" ] }, "ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AttributionOfExpensesByNatureToTheirFunctionDomain", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Attribution of expenses by nature to their function [domain]", "label": "Attribution of expenses by nature to their function [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value of the \u2018Attribution of expenses by nature to their function' axis if no other member is used." } } }, "auth_ref": [ "r575", "r578" ] }, "bti_AuditProviderMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditProviderMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Audit providers", "label": "Audit Provider [Member]", "documentation": "Audit provider." } } }, "auth_ref": [] }, "bti_AuditProvidersAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditProvidersAxis", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Audit Providers", "label": "Audit Providers [Axis]", "documentation": "Audit providers." } } }, "auth_ref": [] }, "bti_AuditProvidersMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditProvidersMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Audit Providers Member", "label": "Audit Providers [Member]", "documentation": "Audit providers." } } }, "auth_ref": [] }, "bti_AuditRelatedAssuranceServicesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditRelatedAssuranceServicesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "audit-related assurance services", "label": "Audit Related Assurance Services [Member]", "documentation": "Audit related assurance services." } } }, "auth_ref": [] }, "bti_AuditScopeAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditScopeAxis", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Audit Scope", "label": "Audit Scope [Axis]", "documentation": "Audit scope." } } }, "auth_ref": [] }, "bti_AuditScopeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditScopeMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Audit Scope Member", "label": "Audit Scope [Member]", "documentation": "Audit scope." } } }, "auth_ref": [] }, "dei_AuditorFirmId": { "xbrltype": "nonemptySequenceNumberItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AuditorFirmId", "presentation": [ "http://www.bat.com/role/AuditInformation" ], "lang": { "en-us": { "role": { "terseLabel": "Auditor Firm ID", "label": "Auditor Firm ID", "documentation": "PCAOB issued Audit Firm Identifier" } } }, "auth_ref": [ "r465", "r466", "r489" ] }, "bti_AuditorInformationAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditorInformationAbstract", "lang": { "en-us": { "role": { "label": "Auditor Information [Abstract]", "documentation": "Auditor Information" } } }, "auth_ref": [] }, "dei_AuditorLocation": { "xbrltype": "internationalNameItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AuditorLocation", "presentation": [ "http://www.bat.com/role/AuditInformation" ], "lang": { "en-us": { "role": { "terseLabel": "Auditor Location", "label": "Auditor Location" } } }, "auth_ref": [ "r465", "r466", "r489" ] }, "dei_AuditorName": { "xbrltype": "internationalNameItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AuditorName", "presentation": [ "http://www.bat.com/role/AuditInformation" ], "lang": { "en-us": { "role": { "terseLabel": "Auditor Name", "label": "Auditor Name" } } }, "auth_ref": [ "r465", "r466", "r489" ] }, "ifrs-full_AuditorsRemuneration": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AuditorsRemuneration", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Auditor\u2019s remuneration", "label": "Auditor's remuneration" } }, "en": { "role": { "documentation": "The amount of fees paid or payable to the entity's auditors." } } }, "auth_ref": [ "r578" ] }, "ifrs-full_AuditorsRemunerationForAuditServices": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AuditorsRemunerationForAuditServices", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total audit fees expense", "verboseLabel": "Remuneration of auditor, audit fees", "label": "Auditor's remuneration for audit services" } }, "en": { "role": { "documentation": "The amount of fees paid or payable to the entity's auditors for auditing services." } } }, "auth_ref": [ "r578" ] }, "bti_AuditorsRemunerationForOtherAuditorRelatedServices": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AuditorsRemunerationForOtherAuditorRelatedServices", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Remuneration of auditor, other audit-related fees", "label": "Auditors Remuneration For Other Auditor Related Services", "documentation": "Auditors remuneration for other auditor-related services.." } } }, "auth_ref": [] }, "ifrs-full_AuditorsRemunerationForOtherServices": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AuditorsRemunerationForOtherServices", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fees payable for other services", "verboseLabel": "Remuneration of auditor, all other fees", "label": "Auditor's remuneration for other services" } }, "en": { "role": { "documentation": "The amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r578" ] }, "ifrs-full_AuditorsRemunerationForTaxServices": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AuditorsRemunerationForTaxServices", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Remuneration of auditor, tax fees", "label": "Auditor's remuneration for tax services" } }, "en": { "role": { "documentation": "The amount of fees paid or payable to the entity's auditors for tax services." } } }, "auth_ref": [ "r578" ] }, "bti_AvailableForFinancingReportedWithinTradePayablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AvailableForFinancingReportedWithinTradePayablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts available for financing reported within trade payables", "label": "Available For Financing Reported Within Trade Payables [Member]", "documentation": "Available For Financing Reported Within Trade Payables" } } }, "auth_ref": [] }, "ifrs-full_AvailableforsaleFinancialAssetsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AvailableforsaleFinancialAssetsAbstract", "lang": { "en-us": { "role": { "label": "Available-for-sale financial assets [abstract]" } } }, "auth_ref": [] }, "bti_AverageCentrallyManagedDebtMaturity": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AverageCentrallyManagedDebtMaturity", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Average centrally managed debt maturity", "label": "Average Centrally Managed Debt Maturity", "documentation": "Average centrally managed debt maturity." } } }, "auth_ref": [] }, "ifrs-full_AverageEffectiveTaxRate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AverageEffectiveTaxRate", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total average effective tax rate", "label": "Average effective tax rate" } }, "en": { "role": { "documentation": "The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]" } } }, "auth_ref": [ "r66" ] }, "bti_AverageExpectedTermToExercises": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "AverageExpectedTermToExercises", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Average expected term to exercise (years)", "label": "Average Expected Term To Exercises", "documentation": "Average expected term to exercises." } } }, "auth_ref": [] }, "ifrs-full_AverageNumberOfEmployees": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "AverageNumberOfEmployees", "presentation": [ "http://www.bat.com/role/GroupemployeesAdditionalInformationDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Average number of employees", "label": "Average number of employees" } }, "en": { "role": { "documentation": "The average number of personnel employed by the entity during a period." } } }, "auth_ref": [ "r578" ] }, "ecd_AwardExrcPrice": { "xbrltype": "perShareItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardExrcPrice", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Exercise Price", "terseLabel": "Exercise Price" } } }, "auth_ref": [ "r547" ] }, "ecd_AwardGrantDateFairValue": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardGrantDateFairValue", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Grant Date Fair Value", "terseLabel": "Fair Value as of Grant Date" } } }, "auth_ref": [ "r548" ] }, "ecd_AwardTmgDiscLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgDiscLineItems", "lang": { "en-us": { "role": { "label": "Award Timing Disclosures [Line Items]", "terseLabel": "Award Timing Disclosures" } } }, "auth_ref": [ "r543" ] }, "ecd_AwardTmgHowMnpiCnsdrdTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgHowMnpiCnsdrdTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Timing, How MNPI Considered [Text Block]", "terseLabel": "Award Timing, How MNPI Considered" } } }, "auth_ref": [ "r543" ] }, "ecd_AwardTmgMethodTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgMethodTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Timing Method [Text Block]", "terseLabel": "Award Timing Method" } } }, "auth_ref": [ "r543" ] }, "ecd_AwardTmgMnpiCnsdrdFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgMnpiCnsdrdFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Timing MNPI Considered [Flag]", "terseLabel": "Award Timing MNPI Considered" } } }, "auth_ref": [ "r543" ] }, "ecd_AwardTmgMnpiDiscTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgMnpiDiscTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Timing MNPI Disclosure [Text Block]", "terseLabel": "Award Timing MNPI Disclosure" } } }, "auth_ref": [ "r543" ] }, "ecd_AwardTmgPredtrmndFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardTmgPredtrmndFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Timing Predetermined [Flag]", "terseLabel": "Award Timing Predetermined" } } }, "auth_ref": [ "r543" ] }, "us-gaap_AwardTypeAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "AwardTypeAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Type [Axis]", "terseLabel": "Award Type" } } }, "auth_ref": [] }, "ecd_AwardUndrlygSecuritiesAmt": { "xbrltype": "decimalItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardUndrlygSecuritiesAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Award Underlying Securities Amount", "terseLabel": "Underlying Securities" } } }, "auth_ref": [ "r546" ] }, "ecd_AwardsCloseToMnpiDiscIndName": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardsCloseToMnpiDiscIndName", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Awards Close in Time to MNPI Disclosures, Individual Name", "terseLabel": "Name" } } }, "auth_ref": [ "r545" ] }, "ecd_AwardsCloseToMnpiDiscTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardsCloseToMnpiDiscTable", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Awards Close in Time to MNPI Disclosures [Table]", "terseLabel": "Awards Close in Time to MNPI Disclosures" } } }, "auth_ref": [ "r544" ] }, "ecd_AwardsCloseToMnpiDiscTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "AwardsCloseToMnpiDiscTableTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Awards Close in Time to MNPI Disclosures [Table Text Block]", "terseLabel": "Awards Close in Time to MNPI Disclosures, Table" } } }, "auth_ref": [ "r544" ] }, "bti_BATBangladeshMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATBangladeshMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BAT Bangladesh", "label": "BAT Bangladesh [Member]", "documentation": "BAT Bangladesh" } } }, "auth_ref": [] }, "bti_BATCAPMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATCAPMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BATCAP", "label": "BATCAP [Member]", "documentation": "BATCAP." } } }, "auth_ref": [] }, "bti_BATHTNMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATHTNMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BATHTN", "label": "BATHTN [Member]", "documentation": "BATHTN." } } }, "auth_ref": [] }, "bti_BATIFMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATIFMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BATIF", "label": "BATIF [Member]", "documentation": "BATIF." } } }, "auth_ref": [] }, "bti_BATIndustriesPlcMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATIndustriesPlcMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "B A T Industries Plc", "label": "BAT Industries Plc [Member]", "documentation": "BAT Industries Plc." } } }, "auth_ref": [] }, "bti_BATKoreaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATKoreaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BAT Korea", "label": "BAT Korea [Member]", "documentation": "BAT Korea." } } }, "auth_ref": [] }, "bti_BATNFMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATNFMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BATNF", "label": "BATNF [Member]", "documentation": "BATNF." } } }, "auth_ref": [] }, "bti_BATRussiaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BATRussiaMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BAT Russia", "label": "BAT Russia [Member]", "documentation": "BAT Russia" } } }, "auth_ref": [] }, "country_BD": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "BD", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bangladesh", "label": "BANGLADESH" } } }, "auth_ref": [] }, "currency_BDT": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "BDT", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bangladesh, Taka", "label": "Bangladesh, Taka" } } }, "auth_ref": [] }, "country_BR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "BR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Brazil", "label": "BRAZIL" } } }, "auth_ref": [] }, "currency_BRL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "BRL", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Brazil, Brazil Real", "label": "Brazil, Brazil Real" } } }, "auth_ref": [] }, "country_BY": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "BY", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Belarus", "label": "BELARUS" } } }, "auth_ref": [] }, "bti_BalanceSheetLocationsAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BalanceSheetLocationsAxis", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Balance Sheet Location [Axis]", "label": "Balance Sheet, Locations [Axis]", "documentation": "Balance sheet location." } } }, "auth_ref": [] }, "bti_BalanceSheetLocationsDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BalanceSheetLocationsDomain", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Balance Sheet Location [Domain]", "label": "Balance Sheet Locations [Domain]", "documentation": "Balance Sheet Location [Domain]" } } }, "auth_ref": [] }, "ifrs-full_BankOverdraftsClassifiedAsCashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BankOverdraftsClassifiedAsCashEquivalents", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bank overdrafts", "label": "Bank overdrafts" } }, "en": { "role": { "documentation": "The amount that has been withdrawn from an account in excess of existing cash balances. This is considered a short-term extension of credit by the bank. [Refer: Cash and cash equivalents]" } } }, "auth_ref": [ "r623" ] }, "bti_BaseNetOperatingProfitNOPAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BaseNetOperatingProfitNOPAdjustments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Base net operating profit, NOP adjustments", "label": "Base Net Operating Profit, NOP Adjustments", "documentation": "Base Net Operating Profit, NOP Adjustments" } } }, "auth_ref": [] }, "ifrs-full_BasicEarningsLossPerShare": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BasicEarningsLossPerShare", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": "ifrs-full_DilutedEarningsLossPerShare", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails", "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Basic (loss)/earnings (in GBP per share)", "verboseLabel": "Basic earnings/(loss) per share (in GBP per share)", "label": "Basic earnings (loss) per share" } }, "en": { "role": { "documentation": "The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator)." } } }, "auth_ref": [ "r135", "r136" ] }, "ifrs-full_BasicEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BasicEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Basic earnings per share [abstract]", "label": "Basic earnings per share [abstract]" } } }, "auth_ref": [] }, "bti_BatParsCompanyPjscMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BatParsCompanyPjscMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "BAT Pars Company PJSC", "label": "BAT Pars Company PJSC [Member]", "documentation": "BAT Pars Company PJSC." } } }, "auth_ref": [] }, "bti_BenefitsRecognisedForClaimReversal": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BenefitsRecognisedForClaimReversal", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Benefits recognised for claim, reversal", "label": "Benefits Recognised for Claim, Reversal", "documentation": "Benefits Recognised for Claim, Reversal" } } }, "auth_ref": [] }, "bti_BeniOralNicotineLLCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BeniOralNicotineLLCMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Beni Oral Nicotine LLC", "label": "Beni Oral Nicotine LLC [Member]", "documentation": "Beni Oral Nicotine LLC" } } }, "auth_ref": [] }, "bti_BilateralFacilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BilateralFacilitiesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bilateral facilities", "label": "Bilateral Facilities [Member]", "documentation": "Bilateral facilities." } } }, "auth_ref": [] }, "bti_BilateralFacilityWithdrawnAndOutstanding": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BilateralFacilityWithdrawnAndOutstanding", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount withdrawn and outstanding", "label": "Bilateral Facility Withdrawn and Outstanding", "documentation": "Bilateral facility withdrawn and outstanding." } } }, "auth_ref": [] }, "bti_BondCap": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BondCap", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total bond cap", "label": "Bond Cap", "documentation": "Bond cap." } } }, "auth_ref": [] }, "bti_BondRepaidAugust2022OneMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BondRepaidAugust2022OneMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bond repaid, August 2022 one", "label": "Bond Repaid, August 2022 One [Member]", "documentation": "Bond Repaid, August 2022 One" } } }, "auth_ref": [] }, "bti_BondRepaidAugust2022TwoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BondRepaidAugust2022TwoMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bond repaid, August 2022 two", "label": "Bond Repaid, August 2022 Two [Member]", "documentation": "Bond Repaid, August 2022 Two" } } }, "auth_ref": [] }, "bti_BondRepaidJanuary2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BondRepaidJanuary2023Member", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bond repaid, January 2023", "label": "Bond Repaid, January 2023 [Member]", "documentation": "Bond Repaid, January 2023" } } }, "auth_ref": [] }, "ifrs-full_BondsIssued": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BondsIssued", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Bonds issued", "terseLabel": "Fair value of bonds", "label": "Bonds issued" } }, "en": { "role": { "documentation": "The amount of bonds issued by the entity." } } }, "auth_ref": [ "r578" ] }, "bti_BondsIssuedOneMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BondsIssuedOneMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bonds Issued One", "label": "Bonds Issued One [Member]", "documentation": "Bonds issued one." } } }, "auth_ref": [] }, "ifrs-full_Borrowings": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Borrowings", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Borrowings", "terseLabel": "Borrowings", "label": "Borrowings" } }, "en": { "role": { "documentation": "The amount of outstanding funds that the entity is obligated to repay." } } }, "auth_ref": [ "r581" ] }, "ifrs-full_BorrowingsAdjustmentToInterestRateBasis": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BorrowingsAdjustmentToInterestRateBasis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings, adjustment to interest rate basis", "label": "Borrowings, adjustment to interest rate basis" } }, "en": { "role": { "documentation": "The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r627" ] }, "ifrs-full_BorrowingsByNameAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BorrowingsByNameAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings by name [axis]", "label": "Borrowings by name [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r627" ] }, "ifrs-full_BorrowingsByNameDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BorrowingsByNameDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings by name [domain]", "label": "Borrowings by name [domain]" } }, "en": { "role": { "documentation": "This member stands for all borrowings when disaggregated by name. It also represents the standard value for the 'Borrowings by name' axis if no other member is used. [Refer: Borrowings]" } } }, "auth_ref": [ "r627" ] }, "bti_BorrowingsExcludingLeaseLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsExcludingLeaseLiabilitiesMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings (excluding lease liabilities)", "label": "Borrowings Excluding Lease Liabilities [Member]", "documentation": "Borrowings (excluding lease liabilities)." } } }, "auth_ref": [] }, "ifrs-full_BorrowingsInterestRate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BorrowingsInterestRate", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings, interest rate", "label": "Borrowings, interest rate" } }, "en": { "role": { "documentation": "The interest rate on borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r627" ] }, "bti_BorrowingsMaturityTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsMaturityTerm", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings maturity term", "label": "Borrowings Maturity, Term", "documentation": "Borrowings Maturity, Term" } } }, "auth_ref": [] }, "bti_BorrowingsNetOfDerivativeInstrumentAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsNetOfDerivativeInstrumentAdjustments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings net, derivative instruments adjustment", "label": "Borrowings Net Of Derivative Instrument Adjustments", "documentation": "Borrowings net of derivative instrument adjustments." } } }, "auth_ref": [] }, "bti_BorrowingsNetOfDerivativeInstrumentRePricedAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsNetOfDerivativeInstrumentRePricedAdjustments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings net, derivative instruments adjustment", "label": "Borrowings Net Of Derivative Instrument Re Priced Adjustments", "documentation": "Borrowings\u200b net\u200b of derivative \u200binstrument re-priced\u200b adjustments." } } }, "auth_ref": [] }, "bti_BorrowingsSubjectToFairValueHedgesIncreaseDecreaseAtAmortisedCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsSubjectToFairValueHedgesIncreaseDecreaseAtAmortisedCost", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Borrowings subject to fair value hedges, decrease in amortised cost", "label": "Borrowings Subject To Fair Value Hedges Increase (Decrease) At Amortised Cost", "documentation": "Borrowings subject to fair value hedges decrease at amortised cost." } } }, "auth_ref": [] }, "bti_BorrowingsTransferredFromTradeAndOtherPayables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BorrowingsTransferredFromTradeAndOtherPayables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings, transferred from trade and other payables", "label": "Borrowings, Transferred From Trade And Other Payables", "documentation": "Borrowings, Transferred From Trade And Other Payables" } } }, "auth_ref": [] }, "ifrs-full_BottomOfRangeMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BottomOfRangeMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bottom of range", "label": "Bottom of range [member]" } }, "en": { "role": { "documentation": "This member stands for the bottom of a range." } } }, "auth_ref": [ "r197", "r235", "r252", "r268", "r431", "r433", "r627" ] }, "ifrs-full_BrandNamesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BrandNamesMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Brand names", "verboseLabel": "Trademarks and similar intangibles", "label": "Brand names [member]" } }, "en": { "role": { "documentation": "This member stands for a class of intangible assets representing rights to a group of complementary assets such as a trademark (or service mark) and its related trade name, formulas, recipes and technological expertise. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r411" ] }, "bti_BritishAmericanTobaccoBangladeshCompanyLimitedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BritishAmericanTobaccoBangladeshCompanyLimitedMember", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "British American Tobacco Bangladesh Company Limited", "label": "British American Tobacco Bangladesh Company Limited [Member]", "documentation": "British American Tobacco Bangladesh Company Limited." } } }, "auth_ref": [] }, "bti_BritishAmericanTobaccoRomaniaInvestmentS.R.LBATRIMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BritishAmericanTobaccoRomaniaInvestmentS.R.LBATRIMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "British-American Tobacco (Romania) Investment S.R.L, BATRI", "label": "British-American Tobacco (Romania) Investment S.R.L, BATRI [Member]", "documentation": "British-American Tobacco (Romania) Investment S.R.L, BATRI" } } }, "auth_ref": [] }, "bti_BritishAmericanTobaccoUkPensionFundMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BritishAmericanTobaccoUkPensionFundMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "British American Tobacco UK Pension Fund", "label": "British American Tobacco UK Pension Fund [Member]", "documentation": "British american tobacco UK pension fund ." } } }, "auth_ref": [] }, "bti_BritishColumbiaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BritishColumbiaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "British Columbia", "label": "British Columbia [Member]", "documentation": "British Columbia." } } }, "auth_ref": [] }, "bti_BroinIICasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BroinIICasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Broin I I Cases", "label": "Broin II Cases [Member]", "documentation": "Broin II cases." } } }, "auth_ref": [] }, "bti_BroinIICasesUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BroinIICasesUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Broin II Cases", "label": "Broin I I Cases U S Tobacco Related [Member]", "documentation": "Broin II cases, US tobacco related." } } }, "auth_ref": [] }, "bti_BroinVPhilipMorrisIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BroinVPhilipMorrisIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Broin V Philip Morris Inc", "label": "Broin V Philip Morris Inc [Member]", "documentation": "Broin v Philip Morris, Inc." } } }, "auth_ref": [] }, "bti_BrownAndWilliamsonHoldingsIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BrownAndWilliamsonHoldingsIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Brown and Williamson Holdings Inc", "label": "Brown And Williamson Holdings Inc [Member]", "documentation": "Brown and Williamson Holdings Inc." } } }, "auth_ref": [] }, "bti_BtomorrowVenturesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BtomorrowVenturesMember", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Btomorrow Ventures", "label": "Btomorrow Ventures [Member]", "documentation": "Btomorrow Ventures" } } }, "auth_ref": [] }, "ifrs-full_BuildingsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BuildingsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property", "label": "Buildings [member]" } }, "en": { "role": { "documentation": "This member stands for a class of plant, property and equipment representing depreciable buildings and similar structures for use in operations. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r591" ] }, "bti_BusinessCombinationPurchasePriceAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BusinessCombinationPurchasePriceAdjustments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Purchase price adjustments relating to acquisition", "label": "Business Combination Purchase Price Adjustments", "documentation": "Business combination purchase price adjustments." } } }, "auth_ref": [] }, "bti_BusinessCombinationRestructuringAndIntegrationCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BusinessCombinationRestructuringAndIntegrationCosts", "crdr": "debit", "calculation": { "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Business combination integration cost", "label": "Business Combination Restructuring And Integration Costs", "documentation": "Business combination, restructuring and integration costs." } } }, "auth_ref": [] }, "ifrs-full_BusinessCombinationsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BusinessCombinationsAxis", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Business combinations [axis]", "label": "Business combinations [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r279" ] }, "ifrs-full_BusinessCombinationsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "BusinessCombinationsDomain", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Business combinations", "label": "Business combinations [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Business combinations' axis if no other member is used." } } }, "auth_ref": [ "r279", "r284" ] }, "dei_BusinessContactMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "BusinessContactMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Business Contact", "label": "Business Contact [Member]", "documentation": "Business contact for the entity" } } }, "auth_ref": [ "r466", "r489" ] }, "bti_BuyInContractMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "BuyInContractMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Buy-in contract", "label": "Buy In Contract [Member]", "documentation": "Buy-in contract." } } }, "auth_ref": [] }, "country_CA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "CA", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canada", "label": "CANADA" } } }, "auth_ref": [] }, "stpr_CA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "CA", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "California", "label": "CALIFORNIA" } } }, "auth_ref": [] }, "stpr_CA-AB": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "CA-AB", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Alberta", "label": "ALBERTA" } } }, "auth_ref": [] }, "stpr_CA-BC": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "CA-BC", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "British Columbia", "label": "BRITISH COLUMBIA" } } }, "auth_ref": [] }, "stpr_CA-ON": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "CA-ON", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ontario", "label": "ONTARIO" } } }, "auth_ref": [] }, "stpr_CA-QC": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "CA-QC", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Quebec", "label": "QUEBEC" } } }, "auth_ref": [] }, "currency_CAD": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "CAD", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canada, Dollars", "label": "Canada, Dollars" } } }, "auth_ref": [] }, "bti_CCAAProtectionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CCAAProtectionMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "CCAA Protection", "label": "CCAA Protection [Member]", "documentation": "CCAA Protection" } } }, "auth_ref": [] }, "country_CH": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "CH", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Switzerland", "label": "SWITZERLAND" } } }, "auth_ref": [] }, "country_CL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "CL", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Chile", "label": "CHILE" } } }, "auth_ref": [] }, "bti_CallOptionsTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CallOptionsTerm", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Call options, term", "label": "Call Options, Term", "documentation": "Call Options, Term" } } }, "auth_ref": [] }, "bti_CamelMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CamelMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Camel", "label": "Camel [Member]", "documentation": "Camel." } } }, "auth_ref": [] }, "bti_CamelSnusMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CamelSnusMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Camel Snus", "label": "Camel Snus [Member]", "documentation": "Camel Snus" } } }, "auth_ref": [] }, "bti_CamelliaChastainMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CamelliaChastainMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Camellia Chastain", "label": "Camellia Chastain [Member]", "documentation": "Camellia Chastain" } } }, "auth_ref": [] }, "bti_CanadaProposedPlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CanadaProposedPlanMember", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canada Proposed Plan", "label": "Canada Proposed Plan [Member]", "documentation": "Canada Proposed Plan" } } }, "auth_ref": [] }, "bti_CanadianProvinceMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CanadianProvinceMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canadian Province", "label": "Canadian Province [Member]", "documentation": "Canadian province." } } }, "auth_ref": [] }, "bti_CanadianTerritoriesWhereLegislationHasReceivedRoyalAssent": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CanadianTerritoriesWhereLegislationHasReceivedRoyalAssent", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canadian territories where legislation has Royal Assent", "label": "Canadian Territories Where Legislation Has Received Royal Assent", "documentation": "Canadian Territories Where Legislation Has Received Royal Assent" } } }, "auth_ref": [] }, "ifrs-full_CancellationOfTreasuryShares": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CancellationOfTreasuryShares", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Treasury shares cancelled", "negatedTerseLabel": "Changes during the year - treasury shares cancelled", "label": "Cancellation of treasury shares" } }, "en": { "role": { "documentation": "The amount of treasury stock cancelled during the period. [Refer: Treasury shares]" } } }, "auth_ref": [ "r576" ] }, "bti_CapablePeriodToBeParticipantsTaxFree": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapablePeriodToBeParticipantsTaxFree", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period taken to transfer to participants tax free", "label": "Capable Period To Be Participants Tax Free", "documentation": "Capable period to be participants tax free." } } }, "auth_ref": [] }, "ifrs-full_CapitalCommitments": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CapitalCommitments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total future minimum payments under non-cancellable service contracts", "label": "Capital commitments" } }, "en": { "role": { "documentation": "The amount of future capital expenditures that the entity is committed to make." } } }, "auth_ref": [ "r578" ] }, "bti_CapitalGainsTax": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalGainsTax", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital gains tax", "label": "Capital Gains Tax", "documentation": "Capital Gains Tax" } } }, "auth_ref": [] }, "bti_CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital gains tax and deferred tax associated with the partial divestment of shares held in ITC", "label": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In\u00a0ITC On Earnings Basic", "documentation": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In\u00a0ITC On Earnings Basic" } } }, "auth_ref": [] }, "bti_CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 30.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital gains tax and deferred tax associated with the partial divestment of shares held in\u00a0ITC", "label": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In ITC On Earnings Diluted", "documentation": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In ITC On Earnings Diluted" } } }, "auth_ref": [] }, "bti_CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital gains tax and deferred tax associated with the partial divestment of shares held in\u00a0ITC (in GBP per share)", "label": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In\u00a0ITC Per Share Basic", "documentation": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In\u00a0ITC Per Share Basic" } } }, "auth_ref": [] }, "bti_CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalGainsTaxAndDeferredTaxAssociatedWithThePartialDivestmentOfSharesHeldInITCPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital gains tax and deferred tax associated with the partial divestment of shares held in ITC (in GBP per share)", "label": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In ITC Per Share Diluted", "documentation": "Capital Gains Tax And Deferred Tax Associated With The Partial Divestment Of Shares Held In ITC Per Share Diluted" } } }, "auth_ref": [] }, "bti_CapitalInjectionFromPurchasesOfNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CapitalInjectionFromPurchasesOfNoncontrollingInterests", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Capital injection from and purchases of non-controlling interests", "label": "Capital Injection From Purchases Of Noncontrolling Interests", "documentation": "Capital Injection From Purchases Of Noncontrolling Interests" } } }, "auth_ref": [] }, "ifrs-full_CapitalRedemptionReserveMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CapitalRedemptionReserveMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Capital redemption reserve", "label": "Capital redemption reserve [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing the reserve for the redemption of the entity's own shares." } } }, "auth_ref": [ "r577" ] }, "ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]", "label": "Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r77", "r81", "r167", "r171", "r182", "r183", "r184", "r185", "r186", "r283", "r310", "r311" ] }, "ifrs-full_CarryingAmountMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CarryingAmountMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Carrying amount [member]", "label": "Carrying amount [member]" } }, "en": { "role": { "documentation": "This member stands for the amount at which an asset is recognised in the statement of financial position (after deducting any accumulated depreciation or amortisation and accumulated impairment losses). It also represents the standard value for the 'Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount' axis if no other member is used. [Refer: Depreciation and amortisation expense; Impairment loss]" } } }, "auth_ref": [ "r81", "r171", "r182", "r184", "r185", "r283", "r310", "r311" ] }, "bti_CaseOneMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CaseOneMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Case 1", "label": "Case One [Member]", "documentation": "Case One" } } }, "auth_ref": [] }, "bti_CaseThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CaseThreeMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Case 3", "label": "Case Three [Member]", "documentation": "Case Three" } } }, "auth_ref": [] }, "bti_CaseTwoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CaseTwoMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Case 2", "label": "Case Two [Member]", "documentation": "Case Two" } } }, "auth_ref": [] }, "ifrs-full_Cash": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Cash", "crdr": "debit", "calculation": { "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails": { "parentTag": "ifrs-full_CashAndCashEquivalents", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash and bank balances", "label": "Cash" } }, "en": { "role": { "documentation": "The amount of cash on hand and demand deposits. [Refer: Cash on hand]" } } }, "auth_ref": [ "r623" ] }, "bti_CashAndCashEquivalentLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashAndCashEquivalentLineItems", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash And Cash Equivalent [Line Items]", "label": "Cash And Cash Equivalent [Line Items]", "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_CashAndCashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashAndCashEquivalents", "crdr": "debit", "calculation": { "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails": { "parentTag": "ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 4.0 }, "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash and cash equivalents", "totalLabel": "Cash and cash equivalents", "label": "Cash and cash equivalents" } }, "en": { "role": { "documentation": "The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]" } } }, "auth_ref": [ "r15", "r198", "r223" ] }, "ifrs-full_CashAndCashEquivalentsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashAndCashEquivalentsAbstract", "lang": { "en-us": { "role": { "label": "Cash and cash equivalents [abstract]" } } }, "auth_ref": [] }, "ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition", "crdr": "debit", "calculation": { "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "periodStartLabel": "Net cash and cash equivalents at 1 January", "periodEndLabel": "Net cash and cash equivalents at 31 December", "totalLabel": "Net cash and cash equivalents", "label": "Cash and cash equivalents if different from statement of financial position" } }, "en": { "role": { "documentation": "The amount of cash and cash equivalents in the statement of cash flows when different from the amount of cash and cash equivalents in the statement of financial position. [Refer: Cash and cash equivalents]" } } }, "auth_ref": [ "r623" ] }, "bti_CashAndCashEquivalentsRelatedToNetDebtMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashAndCashEquivalentsRelatedToNetDebtMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash and cash equivalents", "label": "Cash And Cash Equivalents Related To Net Debt [Member]", "documentation": "Cash and cash equivalents related to net debt." } } }, "auth_ref": [] }, "bti_CashAndCashEquivalentsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashAndCashEquivalentsTable", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash And Cash Equivalents [Table]", "label": "Cash And Cash Equivalents [Table]", "documentation": "Cash and cash equivalents table." } } }, "auth_ref": [] }, "ifrs-full_CashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashEquivalents", "crdr": "debit", "calculation": { "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails": { "parentTag": "ifrs-full_CashAndCashEquivalents", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsScheduleRepresentingCashandCashEquivalentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash equivalents", "label": "Cash equivalents" } }, "en": { "role": { "documentation": "The amount of short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value." } } }, "auth_ref": [ "r623" ] }, "ifrs-full_CashFlowHedgesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowHedgesAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flow hedges", "label": "Cash flow hedges [abstract]" } } }, "auth_ref": [] }, "ifrs-full_CashFlowHedgesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowHedgesMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flow hedges", "label": "Cash flow hedges [member]" } }, "en": { "role": { "documentation": "This member stands for hedges of the exposure to variability in cash flows that (a) are attributable to a particular risk associated with a recognised asset or liability (such as all or some future interest payments on variable rate debt) or a highly probable forecast transaction; and (b) could affect profit or loss. [Refer: Types of hedges [domain]]" } } }, "auth_ref": [ "r179", "r296", "r301", "r304" ] }, "ifrs-full_CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Disposal of subsidiary, net of cash disposed of", "label": "Cash flows from losing control of subsidiaries or other businesses, classified as investing activities" } }, "en": { "role": { "documentation": "The aggregate cash flows arising from losing control of subsidiaries or other businesses, classified as investing activities. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r193" ] }, "ifrs-full_CashFlowsFromUsedInFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInFinancingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net cash used in financing activities", "terseLabel": "Net cash used in financing activities", "label": "Cash flows from (used in) financing activities" } }, "en": { "role": { "documentation": "The cash flows from (used in) financing activities, which are activities that result in changes in the size and composition of the contributed equity and borrowings of the entity, from continuing and discontinued operations." } } }, "auth_ref": [ "r187", "r199" ] }, "ifrs-full_CashFlowsFromUsedInFinancingActivitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInFinancingActivitiesAbstract", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flows from financing activities", "label": "Cash flows from (used in) financing activities [abstract]" } } }, "auth_ref": [] }, "ifrs-full_CashFlowsFromUsedInInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net cash generated from/(used in) investing activities", "terseLabel": "Net cash generated from/(used in) investing activities", "label": "Cash flows from (used in) investing activities" } }, "en": { "role": { "documentation": "The cash flows from (used in) investing activities, which are the acquisition and disposal of long-term assets and other investments not included in cash equivalents, from continuing and discontinued operations." } } }, "auth_ref": [ "r187", "r199" ] }, "ifrs-full_CashFlowsFromUsedInInvestingActivitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInInvestingActivitiesAbstract", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flows from investing activities", "label": "Cash flows from (used in) investing activities [abstract]" } } }, "auth_ref": [] }, "ifrs-full_CashFlowsFromUsedInOperatingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInOperatingActivities", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net cash generated from operating activities", "terseLabel": "Net cash generated from operating activities", "label": "Cash flows from (used in) operating activities" } }, "en": { "role": { "documentation": "The cash flows from (used in) operating activities, which are the principal revenue-producing activities of the entity and other activities that are not investing or financing activities, from continuing and discontinued operations. [Refer: Revenue]" } } }, "auth_ref": [ "r187", "r199" ] }, "ifrs-full_CashFlowsFromUsedInOperations": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CashFlowsFromUsedInOperations", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperatingActivities", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "totalLabel": "Cash generated from operating activities", "label": "Cash flows from (used in) operations" } }, "en": { "role": { "documentation": "The cash from (used in) the entity's operations." } } }, "auth_ref": [ "r419", "r423" ] }, "bti_CashInflowFromInvestmentsHeldAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashInflowFromInvestmentsHeldAtFairValue", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": "ifrs-full_InflowsOfCashFromInvestingActivities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Cash inflow from investments held at fair value", "label": "Cash Inflow From Investments Held At Fair Value", "documentation": "Cash inflow from investments held at fair value." } } }, "auth_ref": [] }, "bti_CashInflowFromLoansAndOtherReceivables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashInflowFromLoansAndOtherReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": "ifrs-full_InflowsOfCashFromInvestingActivities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Cash inflow from loans and other receivables", "label": "Cash Inflow From Loans And Other Receivables", "documentation": "Cash inflow from loans and other receivables." } } }, "auth_ref": [] }, "bti_CashMovementAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashMovementAxis", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash Movement", "label": "Cash Movement [Axis]", "documentation": "Cash movement." } } }, "auth_ref": [] }, "bti_CashMovementDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashMovementDomain", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash Movement [Domain]", "label": "Cash Movement [Domain]", "documentation": "Cash Movement [Domain]" } } }, "auth_ref": [] }, "bti_CashOutflowFromInvestmentsHeldAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashOutflowFromInvestmentsHeldAtFairValue", "crdr": "credit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": "ifrs-full_OutflowsOfCashFromInvestingActivities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash outflow from investments held at fair value", "label": "Cash Outflow From Investments Held At Fair Value", "documentation": "Cash outflow from investments held at fair value." } } }, "auth_ref": [] }, "bti_CashOutflowFromLoansAndOtherReceivables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashOutflowFromLoansAndOtherReceivables", "crdr": "credit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": "ifrs-full_OutflowsOfCashFromInvestingActivities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash outflow from loans and other receivables", "label": "Cash Outflow From Loans And Other Receivables", "documentation": "Cash outflow from loans and other receivables." } } }, "auth_ref": [] }, "bti_CashReceivedFromSaleAndLeasebackTransactions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashReceivedFromSaleAndLeasebackTransactions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash received from sale and leaseback transactions", "label": "Cash Received From Sale And Leaseback Transactions", "documentation": "Cash Received From Sale And Leaseback Transactions" } } }, "auth_ref": [] }, "bti_CashRetainedForWorkingCapitalNeeds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashRetainedForWorkingCapitalNeeds", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash retained for working capital needs", "label": "Cash Retained For Working Capital Needs", "documentation": "Cash Retained For Working Capital Needs" } } }, "auth_ref": [] }, "bti_CashSettledDeferredShareBonusSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashSettledDeferredShareBonusSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DSBS, Cash-settled", "label": "Cash Settled Deferred Share Bonus Scheme [Member]", "documentation": "This member stands for cash settled deferred share bonus scheme." } } }, "auth_ref": [] }, "bti_CashSettledLongTermIncentivePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashSettledLongTermIncentivePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "LTIP, Cash-settled", "label": "Cash Settled Long Term Incentive Plan [Member]", "documentation": "The member stands for cash settled long-term incentive plan." } } }, "auth_ref": [] }, "bti_CashSettledMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashSettledMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash-settled", "label": "Cash Settled [Member]", "documentation": "This member stands for cash settled share-based payment awards." } } }, "auth_ref": [] }, "bti_CashSettledOtherSchemesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CashSettledOtherSchemesMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other schemes, cash-settled", "label": "Cash Settled Other Schemes [Member]", "documentation": "Cash Settled Other Schemes" } } }, "auth_ref": [] }, "ifrs-full_CategoriesOfFinancialAssetsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CategoriesOfFinancialAssetsAxis", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Categories of financial assets [axis]", "label": "Categories of financial assets [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r324" ] }, "ifrs-full_CategoriesOfFinancialAssetsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CategoriesOfFinancialAssetsDomain", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Categories of financial assets [domain]", "label": "Categories of financial assets [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated categories of financial assets. It also represents the standard value for the 'Categories of financial assets' axis if no other member is used. [Refer: Financial assets]" } } }, "auth_ref": [ "r324" ] }, "ifrs-full_CategoriesOfRelatedPartiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CategoriesOfRelatedPartiesAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Categories of related parties [axis]", "label": "Categories of related parties [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r123" ] }, "ifrs-full_CategoriesOfRelatedPartiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CategoriesOfRelatedPartiesDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Categories of related parties [domain]", "label": "Categories of related parties [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Categories of related parties' axis if no other member is used." } } }, "auth_ref": [ "r123" ] }, "bti_CategoryOfCase": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CategoryOfCase", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Category of case", "label": "Category Of Case", "documentation": "Broad categories: medical reimbursement cases; class actions; individual cases and other claims." } } }, "auth_ref": [] }, "bti_ChairmanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ChairmanMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Chairman", "label": "Chairman [Member]", "documentation": "Chairman." } } }, "auth_ref": [] }, "ecd_ChangedPeerGroupFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ChangedPeerGroupFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Changed Peer Group, Footnote [Text Block]", "terseLabel": "Changed Peer Group, Footnote" } } }, "auth_ref": [ "r522" ] }, "ifrs-full_ChangesInEquityAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ChangesInEquityAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Other changes in equity", "label": "Changes in equity [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ChangesInInventoriesOfFinishedGoodsAndWorkInProgress", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": -1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Changes in inventories of finished goods and work in progress", "label": "Decrease (increase) in inventories of finished goods and work in progress" } }, "en": { "role": { "documentation": "The decrease (increase) in inventories of finished goods and work in progress. [Refer: Inventories; Current finished goods; Current work in progress]" } } }, "auth_ref": [ "r61", "r378" ] }, "ifrs-full_ChangesInNetDefinedBenefitLiabilityAssetAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ChangesInNetDefinedBenefitLiabilityAssetAbstract", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in net defined benefit liability (asset) [abstract]", "label": "Changes in net defined benefit liability (asset) [abstract]" } } }, "auth_ref": [] }, "bti_ChangesInPlanAssetsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ChangesInPlanAssetsAbstract", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in Plan Assets [Abstract]", "label": "Changes in Plan Assets [Abstract]", "documentation": "Changes in Plan Assets" } } }, "auth_ref": [] }, "bti_ChangesInUnrecognisedFundedSchemeSurplusesDeficitAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ChangesInUnrecognisedFundedSchemeSurplusesDeficitAbstract", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in Unrecognised Funded Scheme Surpluses Deficit [Abstract]", "label": "Changes in Unrecognised Funded Scheme Surpluses Deficit [Abstract]", "documentation": "Changes in Unrecognised Funded Scheme Surpluses Deficit" } } }, "auth_ref": [] }, "bti_CharlottesWebHoldingsIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CharlottesWebHoldingsIncMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Charlotte's Web Holdings, Inc.", "label": "Charlotte's Web Holdings, Inc. [Member]", "documentation": "Charlotte's Web Holdings, Inc." } } }, "auth_ref": [] }, "ecd_ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ChngInFrValAsOfVstngDtOfPrrYrEqtyAwrdsVstdInCvrdYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]", "terseLabel": "Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year" } } }, "auth_ref": [ "r519" ] }, "ecd_ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ChngInFrValOfOutsdngAndUnvstdEqtyAwrdsGrntdInPrrYrsMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]", "terseLabel": "Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested" } } }, "auth_ref": [ "r517" ] }, "dei_CityAreaCode": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "CityAreaCode", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "City Area Code", "label": "City Area Code", "documentation": "Area code of city" } } }, "auth_ref": [] }, "bti_ClassActionAllegedExcessAmountThatPlaintiffsSeeking": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ClassActionAllegedExcessAmountThatPlaintiffsSeeking", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Class action alleged excess amount that plaintiffs seeking", "label": "Class Action Alleged Excess Amount That Plaintiffs Seeking", "documentation": "Class action alleged Excess amount that plaintiffs seeking." } } }, "auth_ref": [] }, "bti_ClassActionAllegedMaximumAmountThatPlaintiffsSeeking": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ClassActionAllegedMaximumAmountThatPlaintiffsSeeking", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Class action alleged maximum amount that plaintiffs seeking", "label": "Class Action Alleged Maximum Amount That Plaintiffs Seeking", "documentation": "Class action alleged maximum amount that plaintiffs seeking." } } }, "auth_ref": [] }, "bti_ClassActionsNonUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ClassActionsNonUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Class actions, Non-US tobacco related", "label": "Class Actions Non U S Tobacco Related [Member]", "documentation": "Class actions, Non-US tobacco related." } } }, "auth_ref": [] }, "bti_ClassActionsUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ClassActionsUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Class actions", "label": "Class Actions U S Tobacco Related [Member]", "documentation": "Class actions, US tobacco related." } } }, "auth_ref": [] }, "ifrs-full_ClassesOfAssetsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfAssetsAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of assets [axis]", "label": "Classes of assets [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r143", "r146", "r234", "r245" ] }, "ifrs-full_ClassesOfAssetsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfAssetsDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of assets", "label": "Classes of assets [domain]" } }, "en": { "role": { "documentation": "This member stands for a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits. It also represents the standard value for the 'Classes of assets' axis if no other member is used." } } }, "auth_ref": [ "r143", "r234", "r245" ] }, "ifrs-full_ClassesOfContingentLiabilitiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfContingentLiabilitiesAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of contingent liabilities [axis]", "label": "Classes of contingent liabilities [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r164", "r281" ] }, "ifrs-full_ClassesOfContingentLiabilitiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfContingentLiabilitiesDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of contingent liabilities", "label": "Classes of contingent liabilities [domain]" } }, "en": { "role": { "documentation": "This member stands for possible obligations that arise from past events and whose existence will be confirmed only by the occurrence or non-occurrence of one or more uncertain future events not wholly within the control of the entity; or, present obligations that arise from past events but are not recognised because (a) it is probable that an outflow of resources embodying economic benefits will be required to settle the obligations; or (b) the amount of the obligations cannot be measured with sufficient reliability. It also represents the standard value for the 'Classes of contingent liabilities' axis if no other member is used." } } }, "auth_ref": [ "r165", "r281" ] }, "ifrs-full_ClassesOfFinancialAssetsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfFinancialAssetsAxis", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of financial assets [axis]", "label": "Classes of financial assets [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r260", "r319", "r320", "r349", "r350" ] }, "ifrs-full_ClassesOfFinancialAssetsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfFinancialAssetsDomain", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of financial assets [domain]", "label": "Classes of financial assets [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated classes of financial assets. It also represents the standard value for the 'Classes of financial assets' axis if no other member is used. [Refer: Financial assets]" } } }, "auth_ref": [ "r260", "r319", "r320", "r349", "r350" ] }, "ifrs-full_ClassesOfFinancialInstrumentsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfFinancialInstrumentsAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of financial instruments [axis]", "label": "Classes of financial instruments [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r310", "r313", "r315", "r316" ] }, "ifrs-full_ClassesOfFinancialInstrumentsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfFinancialInstrumentsDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of financial instruments", "label": "Classes of financial instruments [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated classes of financial instruments. Financial instruments are contracts that give rise to a financial asset of one entity and a financial liability or equity instrument of another entity. It also represents the standard value for the 'Classes of financial instruments' axis if no other member is used. [Refer: Financial assets; Financial liabilities]" } } }, "auth_ref": [ "r310", "r313", "r315", "r316" ] }, "ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfIntangibleAssetsAndGoodwillAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of intangible assets and goodwill [axis]", "label": "Classes of intangible assets and goodwill [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r614" ] }, "ifrs-full_ClassesOfIntangibleAssetsAndGoodwillDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfIntangibleAssetsAndGoodwillDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of intangible assets and goodwill [domain]", "label": "Classes of intangible assets and goodwill [domain]" } }, "en": { "role": { "documentation": "This member stands for intangible assets and goodwill. It also represents the standard value for the 'Classes of intangible assets and goodwill' axis if no other member is used. [Refer: Goodwill; Intangible assets other than goodwill]" } } }, "auth_ref": [ "r614" ] }, "ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfIntangibleAssetsOtherThanGoodwillAxis", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of intangible assets other than goodwill [axis]", "label": "Classes of intangible assets other than goodwill [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r172" ] }, "ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfIntangibleAssetsOtherThanGoodwillDomain", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of intangible assets other than goodwill [domain]", "label": "Classes of intangible assets other than goodwill [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Classes of intangible assets other than goodwill' axis if no other member is used." } } }, "auth_ref": [ "r172" ] }, "ifrs-full_ClassesOfInventoriesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfInventoriesAbstract", "lang": { "en-us": { "role": { "label": "Classes of current inventories [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ClassesOfOtherProvisionsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfOtherProvisionsDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of other provisions [domain]", "label": "Classes of other provisions [domain]" } }, "en": { "role": { "documentation": "This member stands for provisions other than provisions for employee benefits. It also represents the standard value for the 'Classes of other provisions' axis if no other member is used. [Refer: Provisions]" } } }, "auth_ref": [ "r162" ] }, "ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfPropertyPlantAndEquipmentAxis", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of property, plant and equipment [axis]", "label": "Classes of property, plant and equipment [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r82" ] }, "ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfPropertyPlantAndEquipmentDomain", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of property, plant and equipment [domain]", "label": "Classes of property, plant and equipment [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Classes of property, plant and equipment' axis if no other member is used." } } }, "auth_ref": [ "r82" ] }, "ifrs-full_ClassesOfProvisionsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfProvisionsAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of other provisions [axis]", "label": "Classes of other provisions [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r162" ] }, "ifrs-full_ClassesOfShareCapitalAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfShareCapitalAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/Cover", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of share capital [axis]", "label": "Classes of share capital [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r36" ] }, "ifrs-full_ClassesOfShareCapitalDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClassesOfShareCapitalDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/Cover", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Classes of share capital [domain]", "label": "Classes of share capital [domain]" } }, "en": { "role": { "documentation": "This member stands for share capital of the entity. It also represents the standard value for the 'Classes of share capital' axis if no other member is used." } } }, "auth_ref": [ "r36" ] }, "bti_ClosedLitigationMattersExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ClosedLitigationMattersExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Closed Litigation Matters Explanatory", "label": "Closed Litigation Matters Explanatory [Table Text Block]", "documentation": "Closed litigation matters explanatory." } } }, "auth_ref": [] }, "ifrs-full_ClosingForeignExchangeRate": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ClosingForeignExchangeRate", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Closing foreign exchange rate of GBP 1", "label": "Closing foreign exchange rate" } }, "en": { "role": { "documentation": "The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery." } } }, "auth_ref": [ "r578" ] }, "ecd_CoSelectedMeasureAmt": { "xbrltype": "decimalItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CoSelectedMeasureAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Company Selected Measure Amount", "terseLabel": "Company Selected Measure Amount" } } }, "auth_ref": [ "r523" ] }, "ecd_CoSelectedMeasureName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CoSelectedMeasureName", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Company Selected Measure Name", "terseLabel": "Company Selected Measure Name" } } }, "auth_ref": [ "r523" ] }, "bti_CollectionAgentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CollectionAgentMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Collection agent", "label": "Collection Agent [Member]", "documentation": "Collection agent." } } }, "auth_ref": [] }, "bti_CombustiblesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CombustiblesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Combustibles", "label": "Combustibles [Member]", "documentation": "Combustibles." } } }, "auth_ref": [] }, "bti_CommercialPaperIssuanceFacility": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CommercialPaperIssuanceFacility", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Commercial paper issuance facility amount", "label": "Commercial Paper Issuance Facility", "documentation": "The amount of commercial paper is not drawn down but have the ability to drawn down." } } }, "auth_ref": [] }, "ifrs-full_CommercialPapersIssued": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CommercialPapersIssued", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Commercial paper", "label": "Commercial papers issued" } }, "en": { "role": { "documentation": "The amount of commercial paper issued by the entity." } } }, "auth_ref": [ "r578" ] }, "bti_CommitmentChargePercentage": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CommitmentChargePercentage", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Commitment charge percentage", "label": "Commitment Charge Percentage", "documentation": "Commitment Charge Percentage" } } }, "auth_ref": [] }, "ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CompActuallyPaidVsCoSelectedMeasureTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Compensation Actually Paid vs. Company Selected Measure [Text Block]", "terseLabel": "Compensation Actually Paid vs. Company Selected Measure" } } }, "auth_ref": [ "r528" ] }, "ecd_CompActuallyPaidVsNetIncomeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CompActuallyPaidVsNetIncomeTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Compensation Actually Paid vs. Net Income [Text Block]", "terseLabel": "Compensation Actually Paid vs. Net Income" } } }, "auth_ref": [ "r527" ] }, "ecd_CompActuallyPaidVsOtherMeasureTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CompActuallyPaidVsOtherMeasureTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Compensation Actually Paid vs. Other Measure [Text Block]", "terseLabel": "Compensation Actually Paid vs. Other Measure" } } }, "auth_ref": [ "r529" ] }, "ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "CompActuallyPaidVsTotalShareholderRtnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Compensation Actually Paid vs. Total Shareholder Return [Text Block]", "terseLabel": "Compensation Actually Paid vs. Total Shareholder Return" } } }, "auth_ref": [ "r526" ] }, "bti_CompensationPercentageOfCostsIncurred": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CompensationPercentageOfCostsIncurred", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Compensation, percentage of costs incurred", "label": "Compensation, Percentage Of Costs Incurred", "documentation": "Compensation, Percentage Of Costs Incurred" } } }, "auth_ref": [] }, "bti_CompensatoryDamagesAwardedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CompensatoryDamagesAwardedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Compensatory damages", "label": "Compensatory Damages Awarded [Member]", "documentation": "Compensatory Damages Awarded" } } }, "auth_ref": [] }, "bti_CompetitionInvestigationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CompetitionInvestigationsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Competition investigations", "label": "Competition Investigations [Member]", "documentation": "Competition Investigations" } } }, "auth_ref": [] }, "ifrs-full_ComponentsOfEquityAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComponentsOfEquityAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Components of equity [axis]", "label": "Components of equity [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_ComponentsOfEquityDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComponentsOfEquityDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Components of equity [domain]", "label": "Components of equity [domain]" } }, "en": { "role": { "documentation": "This member stands for the residual interest in the assets of the entity after deducting all its liabilities. It also represents the standard value for the 'Components of equity' axis if no other member is used." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_ComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComprehensiveIncome", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/GroupStatementofComprehensiveIncomeAlternativeCalculationDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/GroupStatementofComprehensiveIncome", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total comprehensive income/(expense) for the year, net of tax", "verboseLabel": "Total comprehensive income", "label": "Comprehensive income" } }, "en": { "role": { "documentation": "The amount of change in equity resulting from transactions and other events, other than those changes resulting from transactions with owners in their capacity as owners." } } }, "auth_ref": [ "r1", "r41", "r201", "r203", "r220", "r426" ] }, "ifrs-full_ComprehensiveIncomeAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComprehensiveIncomeAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Comprehensive income and expense", "label": "Comprehensive income [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ComprehensiveIncomeAttributableToAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComprehensiveIncomeAttributableToAbstract", "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Attributable to:", "label": "Comprehensive income attributable to [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComprehensiveIncomeAttributableToNoncontrollingInterests", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncomeAlternativeCalculationDetails": { "parentTag": "ifrs-full_ComprehensiveIncome", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-controlling interests", "verboseLabel": "\u2013 Attributable to non-controlling interests", "label": "Comprehensive income, attributable to non-controlling interests" } }, "en": { "role": { "documentation": "The amount of comprehensive income attributable to non-controlling interests. [Refer: Comprehensive income; Non-controlling interests]" } } }, "auth_ref": [ "r1", "r44" ] }, "ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComprehensiveIncomeAttributableToOwnersOfParent", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncomeAlternativeCalculationDetails": { "parentTag": "ifrs-full_ComprehensiveIncome", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Owners of the parent", "label": "Comprehensive income, attributable to owners of parent" } }, "en": { "role": { "documentation": "The amount of comprehensive income attributable to owners of the parent. [Refer: Comprehensive income]" } } }, "auth_ref": [ "r1", "r45" ] }, "bti_ComputerSoftwareAndIntangibleAssetsUnderDevelopmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ComputerSoftwareAndIntangibleAssetsUnderDevelopmentMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Computer software and assets in the course of development", "label": "Computer Software And Intangible Assets Under Development [Member]", "documentation": "Computer software and intangible assets under development." } } }, "auth_ref": [] }, "ifrs-full_ComputerSoftwareMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ComputerSoftwareMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Computer software", "label": "Computer software [member]" } }, "en": { "role": { "documentation": "This member stands for a class of intangible assets representing computer software. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r412" ] }, "ifrs-full_ConsiderationPaidReceived": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ConsiderationPaidReceived", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Consideration paid", "verboseLabel": "Consideration paid (received)", "label": "Consideration paid (received)" } }, "en": { "role": { "documentation": "The amount of consideration paid or received in respect of both obtaining and losing control of subsidiaries or other businesses. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r194" ] }, "srt_ConsolidatedEntitiesAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ConsolidatedEntitiesAxis", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Consolidated Entities", "label": "Consolidated Entities [Axis]", "documentation": "Information by consolidated entity or group of entities." } } }, "auth_ref": [ "r351", "r365", "r633", "r634", "r635" ] }, "srt_ConsolidatedEntitiesDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ConsolidatedEntitiesDomain", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Consolidated Entities", "label": "Consolidated Entities [Domain]", "documentation": "Entity or group of entities consolidated into reporting entity." } } }, "auth_ref": [ "r351", "r365", "r633", "r634", "r635" ] }, "ifrs-full_ConstructionInProgressMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ConstructionInProgressMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets in the course of construction", "label": "Construction in progress [member]" } }, "en": { "role": { "documentation": "This member stands for expenditure capitalised during the construction of items of property, plant and equipment that are not yet available for use (ie not yet in the location and condition necessary for it to be capable of operating in the manner intended by the management). [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r591" ] }, "dei_ContactPersonnelFaxNumber": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "ContactPersonnelFaxNumber", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Contact Personnel Fax Number", "label": "Contact Personnel Fax Number", "documentation": "Fax Number of contact personnel." } } }, "auth_ref": [ "r466" ] }, "dei_ContactPersonnelName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "ContactPersonnelName", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Contact Personnel Name", "label": "Contact Personnel Name", "documentation": "Name of contact personnel" } } }, "auth_ref": [] }, "ifrs-full_ContingentConsiderationRecognisedAsOfAcquisitionDate": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContingentConsiderationRecognisedAsOfAcquisitionDate", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contingent consideration recognised as of acquisition date", "label": "Contingent consideration recognised as of acquisition date" } }, "en": { "role": { "documentation": "The amount, at acquisition date, of contingent consideration arrangements recognised as consideration transferred in a business combination. [Refer: Total for all business combinations [member]]" } } }, "auth_ref": [ "r276" ] }, "bti_ContingentConsiderationSubjectToMilestonesTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ContingentConsiderationSubjectToMilestonesTerm", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contingent consideration subject to milestones, term", "label": "Contingent Consideration Subject To Milestones, Term", "documentation": "Contingent Consideration Subject To Milestones, Term" } } }, "auth_ref": [] }, "bti_ContingentConsiderationTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ContingentConsiderationTerm", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contingent consideration, term", "label": "Contingent Consideration, Term", "documentation": "Contingent Consideration, Term" } } }, "auth_ref": [] }, "ifrs-full_ContinuingAndDiscontinuedOperationsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContinuingAndDiscontinuedOperationsAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Continuing and discontinued operations [axis]", "label": "Continuing and discontinued operations [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r287" ] }, "ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferAxis", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Continuing involvement in derecognised financial assets by type of transfer [axis]", "label": "Continuing involvement in derecognised financial assets by type of transfer [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r451" ] }, "ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfTransferDomain", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Continuing involvement in derecognised financial assets by type of transfer", "label": "Continuing involvement in derecognised financial assets by type of transfer [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of transfers of financial instruments. It also represents the standard value for the 'Continuing involvement in derecognised financial assets by type of transfer' axis if no other member is used." } } }, "auth_ref": [ "r451" ] }, "ifrs-full_ContinuingOperationsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContinuingOperationsMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Continuing operations, unless line item indicates otherwise [member]", "label": "Continuing operations, unless line item indicates otherwise [member]" } }, "en": { "role": { "documentation": "This member stands for components of the entity that are not discontinued operations. A component of an entity comprises operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of the entity. This meaning may be overridden for line items which are either intrinsically related to discontinued operations (or disposal groups held for sale), or which are typically reported for the aggregate of continuing and discontinued. This member also represents the standard value for the 'Continuing and discontinued operations' axis if no other member is used. [Refer: Discontinued operations [member]; Aggregate continuing and discontinued operations [member]]" } } }, "auth_ref": [ "r287" ] }, "ifrs-full_ContractualCapitalCommitments": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContractualCapitalCommitments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contractual obligation", "label": "Contractual capital commitments" } }, "en": { "role": { "documentation": "The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_ContractualCommitmentsForAcquisitionOfIntangibleAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContractualCommitmentsForAcquisitionOfIntangibleAssets", "crdr": "credit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Future contractual commitments", "label": "Contractual commitments for acquisition of intangible assets" } }, "en": { "role": { "documentation": "The amount of contractual commitments for the acquisition of intangible assets." } } }, "auth_ref": [ "r174" ] }, "bti_ContractualGrossMaturityAmountMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ContractualGrossMaturityAmountMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contractual gross maturities", "label": "Contractual Gross Maturity Amount [Member]", "documentation": "Contractual gross maturity amount." } } }, "auth_ref": [] }, "bti_ContributionsToPlanByEmployer": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ContributionsToPlanByEmployer", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net defined benefit liability (asset)", "label": "Contributions to Plan by Employer", "documentation": "Contributions to plan by employer." } } }, "auth_ref": [] }, "ifrs-full_ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from resulting from contributions to plan by employer" } }, "en": { "role": { "documentation": "The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]]" } } }, "auth_ref": [ "r95" ] }, "ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Contributions by scheme members", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from contributions to plan by plan participants" } }, "en": { "role": { "documentation": "The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]]" } } }, "auth_ref": [ "r95" ] }, "bti_ConversionRatioNewSharesForEveryExistingShare": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ConversionRatioNewSharesForEveryExistingShare", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Conversion ratio, new shares for every existing share (in shares)", "label": "Conversion Ratio, New Shares For Every Existing Share", "documentation": "Conversion Ratio, New Shares For Every Existing Share" } } }, "auth_ref": [] }, "bti_CostOfTreasurySharesRepurchasedAndNotCancelled": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CostOfTreasurySharesRepurchasedAndNotCancelled", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cost of treasury shares repurchased and not cancelled", "label": "Cost Of Treasury Shares Repurchased And Not Cancelled", "documentation": "Cost of treasury shares repurchased and not cancelled." } } }, "auth_ref": [] }, "bti_CostsReversalRelatingToAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CostsReversalRelatingToAssetsHeldForSale", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "(Reversals)/charges in respect of assets held-for-sale", "label": "Costs (Reversal) Relating To Assets Held-For-Sale", "documentation": "Costs (Reversal) Relating To Assets Held-For-Sale" } } }, "auth_ref": [] }, "ifrs-full_CounterpartiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CounterpartiesAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Counterparties [axis]", "label": "Counterparties [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r326" ] }, "ifrs-full_CounterpartiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CounterpartiesDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Counterparties [domain]", "label": "Counterparties [domain]" } }, "en": { "role": { "documentation": "This member stands for the parties to the transaction other than the entity. It also represents the standard value for the 'Counterparties' axis if no other member is used." } } }, "auth_ref": [ "r326" ] }, "srt_CounterpartyNameAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "CounterpartyNameAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Counterparty Name [Axis]", "label": "Counterparty Name [Axis]", "documentation": "Information by name of counterparty. A counterparty is the other party that participates in a financial transaction. Examples include, but not limited to, the name of the financial institution." } } }, "auth_ref": [ "r372", "r373" ] }, "ifrs-full_CountryOfDomicileMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CountryOfDomicileMember", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United Kingdom", "label": "Country of domicile [member]" } }, "en": { "role": { "documentation": "This member stands for the country in which the entity is registered and where it has its legal address or registered office." } } }, "auth_ref": [ "r341", "r342" ] }, "bti_CouponOnPerpetualHybridBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CouponOnPerpetualHybridBonds", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails": { "parentTag": "bti_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityUsedInCalculatingEarningsPerShare", "weight": -1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Coupon on perpetual hybrid bonds", "label": "Coupon On Perpetual Hybrid Bonds", "documentation": "Coupon on perpetual hybrid bonds." } } }, "auth_ref": [] }, "dei_CoverAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "CoverAbstract", "lang": { "en-us": { "role": { "label": "Cover [Abstract]", "documentation": "Cover page." } } }, "auth_ref": [] }, "bti_CreditRecognised": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CreditRecognised", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additional credit recognised", "label": "Credit Recognised", "documentation": "Credit recognised." } } }, "auth_ref": [] }, "bti_CreditsReceived": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CreditsReceived", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additional credit received", "label": "Credits Received", "documentation": "Credits received." } } }, "auth_ref": [] }, "bti_CroatiaKunaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CroatiaKunaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Croatia, Kuna", "label": "Croatia, Kuna [Member]", "documentation": "Croatia, Kuna" } } }, "auth_ref": [] }, "bti_CrowCreekSiouxTribeAndAmericanTobaccoCoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CrowCreekSiouxTribeAndAmericanTobaccoCoMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Crow Creek Sioux Tribe and American Tobacco Co", "label": "Crow Creek Sioux Tribe And American Tobacco Co [Member]", "documentation": "Crow Creek Sioux Tribe and American Tobacco Co." } } }, "auth_ref": [] }, "bti_CrownsRightOfRecoveryAct2009Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CrownsRightOfRecoveryAct2009Member", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Crown's Right Of Recovery Act 2009", "label": "Crown's Right Of Recovery Act 2009 [Member]", "documentation": "Crown's Right Of Recovery Act 2009" } } }, "auth_ref": [] }, "srt_CurrencyAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "CurrencyAxis", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Currency [Axis]", "label": "Currency [Axis]", "documentation": "Information by currency." } } }, "auth_ref": [] }, "ifrs-full_CurrencyRiskMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrencyRiskMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Currency Risk", "label": "Currency risk [member]" } }, "en": { "role": { "documentation": "This member stands for a type of market risk representing the risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in foreign exchange rates. [Refer: Classes of financial instruments [domain]]" } } }, "auth_ref": [ "r253", "r254", "r255", "r256", "r327" ] }, "ifrs-full_CurrencySwapContractMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrencySwapContractMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 cross-currency swaps", "verboseLabel": "Cross-currency swaps", "label": "Currency swap contract [member]" } }, "en": { "role": { "documentation": "This member stands for a currency swap contract. [Refer: Swap contract [member]]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_CurrentAccruedIncomeOtherThanCurrentContractAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentAccruedIncomeOtherThanCurrentContractAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Accrued interest", "label": "Current accrued income other than current contract assets" } }, "en": { "role": { "documentation": "The amount of current accrued income other than current contract assets. [Refer: Accrued income other than contract assets]" } } }, "auth_ref": [ "r581", "r583" ] }, "bti_CurrentAndDeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentAndDeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedTotalLabel": "(Charged)/credited to other comprehensive income", "label": "Current And Deferred Tax Relating To Items Recognised Directly In Other Comprehensive Income", "documentation": "Current and deferred tax relating to items recognised directly in other comprehensive income." } } }, "auth_ref": [] }, "ifrs-full_CurrentAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_Assets", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails": { "parentTag": "ifrs-full_NetAssetsLiabilities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total current assets", "terseLabel": "Current assets", "label": "Current assets" } }, "en": { "role": { "documentation": "The amount of assets that the entity (a) expects to realise or intends to sell or consume in its normal operating cycle; (b) holds primarily for the purpose of trading; (c) expects to realise within twelve months after the reporting period; or (d) classifies as cash or cash equivalents (as defined in IAS 7) unless the asset is restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period. [Refer: Assets]" } } }, "auth_ref": [ "r28", "r216", "r426" ] }, "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssets", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "totalLabel": "Total current assets other than non-current assets classified as held for sale", "label": "Current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners" } }, "en": { "role": { "documentation": "The amount of current assets other than non-current assets or disposal groups classified as held for sale or as held for distribution to owners. [Refer: Current assets; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale; Non-current assets or disposal groups classified as held for distribution to owners]" } } }, "auth_ref": [ "r28" ] }, "ifrs-full_CurrentDerivativeFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentDerivativeFinancialAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": "ifrs-full_DerivativeFinancialAssets", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative financial instruments", "verboseLabel": "Derivative financial assets, Current", "label": "Current derivative financial assets" } }, "en": { "role": { "documentation": "The amount of current derivative financial assets. [Refer: Derivative financial assets]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_CurrentDerivativeFinancialLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentDerivativeFinancialLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": "ifrs-full_DerivativeFinancialLiabilities", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentLiabilities", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative financial instruments", "verboseLabel": "Derivative financial liabilities, Current", "label": "Current derivative financial liabilities" } }, "en": { "role": { "documentation": "The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]" } } }, "auth_ref": [ "r581" ] }, "bti_CurrentFinancialAssetsRelatedToNetDebtMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentFinancialAssetsRelatedToNetDebtMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Current investments held at fair value", "label": "Current Financial Assets Related To Net Debt [Member]", "documentation": "Current financial assets related to net debt." } } }, "auth_ref": [] }, "dei_CurrentFiscalYearEndDate": { "xbrltype": "gMonthDayItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "CurrentFiscalYearEndDate", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Current Fiscal Year End Date", "label": "Current Fiscal Year End Date", "documentation": "End date of current fiscal year in the format --MM-DD." } } }, "auth_ref": [] }, "ifrs-full_CurrentInterestPayable": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentInterestPayable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest payable", "label": "Current interest payable" } }, "en": { "role": { "documentation": "The amount of current interest payable. [Refer: Interest payable]" } } }, "auth_ref": [ "r578" ] }, "bti_CurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails": { "parentTag": "ifrs-full_InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "verboseLabel": "Current", "label": "Current Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Current investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "ifrs-full_CurrentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails": { "parentTag": "ifrs-full_NetAssetsLiabilities", "weight": -1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAndLiabilities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total current liabilities", "negatedLabel": "Current liabilities", "terseLabel": "Current liabilities", "label": "Current liabilities" } }, "en": { "role": { "documentation": "The amount of liabilities that: (a) the entity expects to settle in its normal operating cycle; (b) the entity holds primarily for the purpose of trading; (c) are due to be settled within twelve months after the reporting period; or (d) the entity does not have the right at the end of the reporting period to defer settlement for at least twelve months after the reporting period." } } }, "auth_ref": [ "r29", "r218", "r426" ] }, "ifrs-full_CurrentProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentProvisions", "crdr": "credit", "calculation": { "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails": { "parentTag": "ifrs-full_Provisions", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentLiabilities", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other provisions for liabilities", "verboseLabel": "\u2013 current", "label": "Current provisions" } }, "en": { "role": { "documentation": "The amount of current provisions, including provisions for employee benefits. [Refer: Provisions]" } } }, "auth_ref": [ "r18" ] }, "ifrs-full_CurrentRawMaterialsAndCurrentProductionSupplies": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentRawMaterialsAndCurrentProductionSupplies", "crdr": "debit", "calculation": { "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails": { "parentTag": "ifrs-full_Inventories", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Raw materials and consumables", "label": "Current raw materials and current production supplies" } }, "en": { "role": { "documentation": "A classification of current inventory representing the amount of current raw materials and current production supplies. [Refer: Current production supplies; Current raw materials]" } } }, "auth_ref": [ "r604" ] }, "ifrs-full_CurrentReceivablesFromTaxesOtherThanIncomeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentReceivablesFromTaxesOtherThanIncomeTax", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Current receivables from taxes other than income tax", "label": "Current receivables from taxes other than income tax" } }, "en": { "role": { "documentation": "The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax]" } } }, "auth_ref": [ "r582" ] }, "ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentServiceCostNetDefinedBenefitLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Current service cost", "label": "Increase in net defined benefit liability (asset) resulting from current service cost" } }, "en": { "role": { "documentation": "The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r89" ] }, "bti_CurrentServiceCostRelatingToAdministrativeCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentServiceCostRelatingToAdministrativeCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Current service costs", "label": "Current Service Cost Relating To Administrative Costs", "documentation": "Current service cost relating to administrative costs." } } }, "auth_ref": [] }, "ifrs-full_CurrentTaxAssetsCurrent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentTaxAssetsCurrent", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Income tax receivable", "label": "Current tax assets, current" } }, "en": { "role": { "documentation": "The current amount of current tax assets. [Refer: Current tax assets]" } } }, "auth_ref": [ "r19" ] }, "ifrs-full_CurrentTaxExpenseIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentTaxExpenseIncome", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 current year tax expense", "label": "Current tax expense (income)" } }, "en": { "role": { "documentation": "The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period." } } }, "auth_ref": [ "r389" ] }, "ifrs-full_CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total current tax", "label": "Current tax expense (income) and adjustments for current tax of prior periods" } }, "en": { "role": { "documentation": "The amount of current tax expense (income) and adjustments for the current tax of prior periods. [Refer: Current tax expense (income); Adjustments for current tax of prior periods]" } } }, "auth_ref": [ "r586" ] }, "bti_CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsIncludingPillarTwoIncomeTaxes": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsIncludingPillarTwoIncomeTaxes", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total current tax", "label": "Current Tax Expense (Income) and Adjustments for Current Tax of Prior Periods, Including Pillar Two Income Taxes", "documentation": "Current Tax Expense (Income) and Adjustments for Current Tax of Prior Periods, Including Pillar Two Income Taxes" } } }, "auth_ref": [] }, "ifrs-full_CurrentTaxExpenseIncomeRelatedToPillarTwoIncomeTaxes": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentTaxExpenseIncomeRelatedToPillarTwoIncomeTaxes", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": "bti_CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriodsIncludingPillarTwoIncomeTaxes", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Pillar Two income taxes", "label": "Current tax expense (income), related to Pillar Two income taxes" } }, "en": { "role": { "documentation": "The amount of current tax expense (income) related to Pillar Two income taxes." } } }, "auth_ref": [ "r73" ] }, "ifrs-full_CurrentTaxLiabilitiesCurrent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "CurrentTaxLiabilitiesCurrent", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentLiabilities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Income tax payable", "label": "Current tax liabilities, current" } }, "en": { "role": { "documentation": "The current amount of current tax liabilities. [Refer: Current tax liabilities]" } } }, "auth_ref": [ "r19" ] }, "bti_CurrentTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CurrentTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails": { "parentTag": "bti_CurrentAndDeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Current tax", "label": "Current Tax Relating To Items Recognised Directly In Other Comprehensive Income", "documentation": "Current tax relating to items recognised directly in other comprehensive income." } } }, "auth_ref": [] }, "bti_CustomerSupplyAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CustomerSupplyAgreementMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Customer supply agreement", "label": "Customer Supply Agreement [Member]", "documentation": "Customer Supply Agreement" } } }, "auth_ref": [] }, "bti_CustomerSupplyAgreementWithEarlyPaymentOptionAtDiscountMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CustomerSupplyAgreementWithEarlyPaymentOptionAtDiscountMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Customer supply agreement with early payment option, at discount", "label": "Customer Supply Agreement With Early Payment Option, At Discount [Member]", "documentation": "Customer Supply Agreement With Early Payment Option, At Discount" } } }, "auth_ref": [] }, "bti_CustomersAndDistributorsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CustomersAndDistributorsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Customers and distributors", "label": "Customers And Distributors [Member]", "documentation": "Customers And Distributors" } } }, "auth_ref": [] }, "bti_CustomsDutyAndPenalty": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "CustomsDutyAndPenalty", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Customs duties and penalties", "label": "Customs Duty And Penalty", "documentation": "Customs duty and penalty." } } }, "auth_ref": [] }, "cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]" } } }, "auth_ref": [ "r474", "r563" ] }, "cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskBoardOfDirectorsOversightTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Board of Directors Oversight [Text Block]" } } }, "auth_ref": [ "r474", "r563" ] }, "cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Expertise of Management Responsible [Text Block]" } } }, "auth_ref": [ "r476", "r565" ] }, "cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Positions or Committees Responsible [Flag]" } } }, "auth_ref": [ "r476", "r565" ] }, "cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]" } } }, "auth_ref": [ "r478", "r567" ] }, "cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Positions or Committees Responsible [Text Block]" } } }, "auth_ref": [ "r476", "r565" ] }, "cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]" } } }, "auth_ref": [ "r469", "r558" ] }, "cyd_CybersecurityRiskManagementProcessesIntegratedFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementProcessesIntegratedFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Processes Integrated [Flag]" } } }, "auth_ref": [ "r470", "r559" ] }, "cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementProcessesIntegratedTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Processes Integrated [Text Block]" } } }, "auth_ref": [ "r470", "r559" ] }, "cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementStrategyAndGovernanceAbstract", "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management, Strategy, and Governance [Abstract]" } } }, "auth_ref": [ "r468", "r557" ] }, "cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementStrategyAndGovernanceLineItems", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management, Strategy, and Governance [Line Items]" } } }, "auth_ref": [ "r468", "r557" ] }, "cyd_CybersecurityRiskManagementStrategyAndGovernanceTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementStrategyAndGovernanceTable", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management, Strategy, and Governance [Table]" } } }, "auth_ref": [ "r468", "r557" ] }, "cyd_CybersecurityRiskManagementThirdPartyEngagedFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskManagementThirdPartyEngagedFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Management Third Party Engaged [Flag]" } } }, "auth_ref": [ "r471", "r560" ] }, "cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]" } } }, "auth_ref": [ "r473", "r562" ] }, "cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]" } } }, "auth_ref": [ "r473", "r562" ] }, "cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]" } } }, "auth_ref": [ "r474", "r563" ] }, "cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]" } } }, "auth_ref": [ "r477", "r566" ] }, "cyd_CybersecurityRiskRoleOfManagementTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskRoleOfManagementTextBlock", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Role of Management [Text Block]" } } }, "auth_ref": [ "r475", "r564" ] }, "cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/cyd/2024", "localname": "CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag", "presentation": [ "http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure" ], "lang": { "en-us": { "role": { "label": "Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]" } } }, "auth_ref": [ "r472", "r561" ] }, "country_DE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "DE", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Germany", "label": "GERMANY" } } }, "auth_ref": [] }, "bti_DOJAndOFACInvestigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DOJAndOFACInvestigationMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DOJ and OFAC investigation", "label": "DOJ and OFAC Investigation [Member]", "documentation": "DOJ and OFAC Investigation" } } }, "auth_ref": [] }, "bti_DOJOFACInvestigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DOJOFACInvestigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DOJ & OFAC investigation", "label": "DOJ & OFAC Investigation [Member]", "documentation": "DOJ & OFAC Investigation" } } }, "auth_ref": [] }, "bti_DeFloriaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeFloriaMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DeFloria", "label": "DeFloria [Member]", "documentation": "DeFloria" } } }, "auth_ref": [] }, "bti_DebtFacilityDrawdownMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DebtFacilityDrawdownMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Debt facility drawdown", "label": "Debt Facility Drawdown [Member]", "documentation": "Debt Facility Drawdown" } } }, "auth_ref": [] }, "ifrs-full_DebtInstrumentsAmountContributedToFairValueOfPlanAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DebtInstrumentsAmountContributedToFairValueOfPlanAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails": { "parentTag": "ifrs-full_PlanAssetsAtFairValue", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bonds", "label": "Debt instruments, amount contributed to fair value of plan assets" } }, "en": { "role": { "documentation": "The amount instruments representing debt (rather than equity) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]]" } } }, "auth_ref": [ "r401" ] }, "bti_DecreaseInLongTermGrowthRatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseInLongTermGrowthRatesMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in long term growth rates", "label": "Decrease in Long Term Growth Rates [Member]", "documentation": "Decrease in Long Term Growth Rates" } } }, "auth_ref": [] }, "bti_DecreaseInPreTaxProfitBasedOnIncreaseInInterestRates": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseInPreTaxProfitBasedOnIncreaseInInterestRates", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in pre-tax profit based on 100 basis point increase in interest rates", "label": "Decrease In Pre Tax Profit Based On Increase In Interest Rates", "documentation": "Decrease in pre-tax profit based on increase in interest rates." } } }, "auth_ref": [] }, "bti_DecreaseInRevenueMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseInRevenueMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in revenue", "label": "Decrease In Revenue [Member]", "documentation": "Decrease in revenue." } } }, "auth_ref": [] }, "bti_DecreaseInThreePercentTobaccoCompaniesNetIncomeAfterTaxesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseInThreePercentTobaccoCompaniesNetIncomeAfterTaxesMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in three percent, tobacco companies net income after taxes", "label": "Decrease In Three Percent, Tobacco Companies Net Income After Taxes [Member]", "documentation": "Decrease In Three Percent, Tobacco Companies Net Income After Taxes" } } }, "auth_ref": [] }, "bti_DecreaseInVolumeYearOnYearInTheDiscretePeriodRateMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseInVolumeYearOnYearInTheDiscretePeriodRateMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in volume year on year in the discrete period, rate", "label": "Decrease in Volume Year On Year In the Discrete Period, Rate [Member]", "documentation": "Decrease in Volume Year On Year In the Discrete Period, Rate" } } }, "auth_ref": [] }, "bti_DecreaseIncreaseThroughCashFlowHedgesReclassifiedAndReportedInTotalAssetsEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseIncreaseThroughCashFlowHedgesReclassifiedAndReportedInTotalAssetsEquity", "crdr": "debit", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Cash flow hedges reclassified and reported in total assets", "label": "Decrease (Increase) Through Cash Flow Hedges Reclassified and Reported in Total Assets, Equity", "documentation": "Decrease (Increase) Through Cash Flow Hedges Reclassified and Reported in Total Assets, Equity" } } }, "auth_ref": [] }, "bti_DecreaseLessThanThreePercentTobaccoCompaniesNetIncomeAfterTaxesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DecreaseLessThanThreePercentTobaccoCompaniesNetIncomeAfterTaxesMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease less than three percent, tobacco companies net income after taxes", "label": "Decrease Less Than Three Percent, Tobacco Companies Net Income After Taxes [Member]", "documentation": "Decrease Less Than Three Percent, Tobacco Companies Net Income After Taxes" } } }, "auth_ref": [] }, "ifrs-full_DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DecreaseThroughClassifiedAsHeldForSalePropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "credit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Net reclassifications as held-for-sale", "label": "Decrease through classified as held for sale, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The decrease in property, plant and equipment including right-of-use assets through classification as held for sale or inclusion in a disposal group classified as held for sale. [Refer: Disposal groups classified as held for sale [member]; Property, plant and equipment including right-of-use assets; Disposal groups classified as held for sale [member]]" } } }, "auth_ref": [ "r593" ] }, "ifrs-full_DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deductible temporary differences for which no deferred tax asset is recognised", "label": "Deductible temporary differences for which no deferred tax asset is recognised" } }, "en": { "role": { "documentation": "The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]]" } } }, "auth_ref": [ "r67" ] }, "bti_DeferredIncomeExcludingFIIGLO": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredIncomeExcludingFIIGLO", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred income", "label": "Deferred Income Excluding FII GLO", "documentation": "Deferred income excluding FII GLO." } } }, "auth_ref": [] }, "bti_DeferredIncomeSubjectToLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredIncomeSubjectToLitigationSettlement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "FII GLO (note 10(b))", "label": "Deferred Income Subject To Litigation Settlement", "documentation": "Deferred income subject to litigation settlement." } } }, "auth_ref": [] }, "bti_DeferredIncomeSubjectToLitigationSettlementAndAssociatedInterests": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredIncomeSubjectToLitigationSettlementAndAssociatedInterests", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "FII GLO (note 10(b))", "label": "Deferred Income Subject To Litigation Settlement And Associated Interests", "documentation": "Deferred Income Subject To Litigation Settlement And Associated Interests" } } }, "auth_ref": [] }, "bti_DeferredMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred members", "label": "Deferred [Member]", "documentation": "Deferred members." } } }, "auth_ref": [] }, "bti_DeferredProsecutionAgreementTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredProsecutionAgreementTerm", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Agreement term", "label": "Deferred Prosecution Agreement, Term", "documentation": "Deferred Prosecution Agreement, Term" } } }, "auth_ref": [] }, "bti_DeferredShareBonusSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredShareBonusSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred Share Bonus Scheme (DSBS)", "label": "Deferred Share Bonus Scheme [Member]", "documentation": "Deferred share bonus scheme (DSBS)." } } }, "auth_ref": [] }, "ifrs-full_DeferredTaxAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax assets", "label": "Deferred tax assets" } }, "en": { "role": { "documentation": "The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]" } } }, "auth_ref": [ "r20", "r24", "r69" ] }, "ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxExpenseIncomeRecognisedInProfitOrLoss", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Deferred tax", "label": "Deferred tax expense (income) recognised in profit or loss" } }, "en": { "role": { "documentation": "The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities]" } } }, "auth_ref": [ "r70" ] }, "ifrs-full_DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": "ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 deferred tax relating to origination and reversal of temporary differences", "label": "Deferred tax expense (income) relating to origination and reversal of temporary differences" } }, "en": { "role": { "documentation": "The amount of deferred tax expense or income relating to the creation or reversal of temporary differences. [Refer: Temporary differences [member]; Deferred tax expense (income)]" } } }, "auth_ref": [ "r391" ] }, "ifrs-full_DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxExpenseIncomeRelatingToTaxRateChangesOrImpositionOfNewTaxes", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": "ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 deferred tax relating to changes in tax rates", "verboseLabel": "Deferred tax relating to changes in tax rates", "negatedNetLabel": "Credited/(charged) relating \u2028to changes in tax rates", "label": "Deferred tax expense (income) relating to tax rate changes or imposition of new taxes" } }, "en": { "role": { "documentation": "The amount of deferred tax expense or income relating to tax rate changes or the imposition of new taxes. [Refer: Deferred tax expense (income)]" } } }, "auth_ref": [ "r392" ] }, "bti_DeferredTaxExpensesIncomeRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxExpensesIncomeRecognisedInProfitOrLoss", "crdr": "debit", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "(Charged)/credited to the \u2028income statement", "label": "Deferred Tax Expenses Income Recognised In Profit Or Loss", "documentation": "Deferred Tax Expenses (Income) Recognised In Profit Or Loss" } } }, "auth_ref": [] }, "ifrs-full_DeferredTaxLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax liabilities", "label": "Deferred tax liabilities" } }, "en": { "role": { "documentation": "The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]]" } } }, "auth_ref": [ "r20", "r24", "r69" ] }, "ifrs-full_DeferredTaxLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DeferredTaxLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "negatedPeriodStartLabel": "Beginning balance at 1 January", "negatedPeriodEndLabel": "Ending balance at 31 December", "terseLabel": "Net deferred tax liability", "label": "Deferred tax liability (asset)" } }, "en": { "role": { "documentation": "The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets]" } } }, "auth_ref": [ "r69" ] }, "bti_DeferredTaxNetReclassificationToAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxNetReclassificationToAssetsHeldForSale", "crdr": "debit", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net reclassifications as held-for-sale", "label": "Deferred Tax Net Reclassification To Assets Held-For-Sale", "documentation": "Deferred Tax Net Reclassification To Assets Held-For-Sale" } } }, "auth_ref": [] }, "bti_DeferredTaxRelatingToChangesInTaxRatesEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxRelatingToChangesInTaxRatesEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 19.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax relating to changes in tax rates (in GBP per share)", "label": "Deferred Tax Relating To Changes In Tax Rates Earnings Per Share Basic", "documentation": "Deferred tax relating to changes in tax rates earnings per share basic." } } }, "auth_ref": [] }, "bti_DeferredTaxRelatingToChangesInTaxRatesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxRelatingToChangesInTaxRatesOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 27.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Deferred tax relating to changes in tax rates", "label": "Deferred Tax Relating To Changes In Tax Rates On Earnings Basic", "documentation": "Deferred tax relating to changes in tax rates on earnings basic." } } }, "auth_ref": [] }, "bti_DeferredTaxRelatingToChangesInTaxRatesOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxRelatingToChangesInTaxRatesOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Deferred tax relating to changes in tax rates", "label": "Deferred Tax Relating To Changes In Tax Rates On Earnings Diluted", "documentation": "Deferred tax relating to changes in tax rates on earnings diluted." } } }, "auth_ref": [] }, "bti_DeferredTaxRelatingToChangesInTaxRatesOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxRelatingToChangesInTaxRatesOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 14.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax relating to changes in tax rates (in GBP per share)", "label": "Deferred Tax Relating To Changes In Tax Rates On Earnings Per Share Diluted", "documentation": "Deferred tax relating to changes in tax rates on earnings per share diluted." } } }, "auth_ref": [] }, "bti_DeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails": { "parentTag": "bti_CurrentAndDeferredTaxRelatingToItemsRecognisedDirectlyInOtherComprehensiveIncome", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxonItemsRecognisedDirectlyinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Credited/(charged) to other \u2028comprehensive income", "label": "Deferred Tax Relating To Items Recognised Directly In Other Comprehensive Income", "documentation": "Deferred Tax Relating To Items Recognised Directly In Other Comprehensive Income" } } }, "auth_ref": [] }, "ifrs-full_DefinedBenefitObligationAtPresentValue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DefinedBenefitObligationAtPresentValue", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Present value of funded/unfunded scheme liabilities", "verboseLabel": "Defined benefit obligation, at present value", "label": "Defined benefit obligation, at present value" } }, "en": { "role": { "documentation": "The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]" } } }, "auth_ref": [ "r601" ] }, "bti_DefinedBenefitPlanAssetsQuotedAndUnquotedAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DefinedBenefitPlanAssetsQuotedAndUnquotedAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined Benefit Plan Assets Quoted And Unquoted", "label": "Defined Benefit Plan Assets Quoted And Unquoted [Axis]", "documentation": "Defined benefit plan assets quoted and unquoted." } } }, "auth_ref": [] }, "bti_DefinedBenefitPlanAssetsQuotedAndUnquotedDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DefinedBenefitPlanAssetsQuotedAndUnquotedDomain", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined Benefit Plan Assets Quoted And Unquoted", "label": "Defined Benefit Plan Assets Quoted And Unquoted [Domain]", "documentation": "Defined benefit plan assets quoted and unquoted domain." } } }, "auth_ref": [] }, "bti_DefinedBenefitPlanTransferOfAssets": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DefinedBenefitPlanTransferOfAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Defined benefit plan, transfer of assets", "label": "Defined Benefit Plan Transfer Of Assets", "documentation": "Defined benefit plan ,transfer of assets." } } }, "auth_ref": [] }, "bti_DefinedBenefitPlanTransfersDeferredPremium": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DefinedBenefitPlanTransfersDeferredPremium", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined benefit plan, deferred premium", "label": "Defined Benefit Plan, Transfers, Deferred Premium", "documentation": "Defined Benefit Plan, Transfers, Deferred Premium" } } }, "auth_ref": [] }, "ifrs-full_DefinedBenefitPlansAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DefinedBenefitPlansAxis", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined benefit plans [axis]", "label": "Defined benefit plans [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r85" ] }, "ifrs-full_DefinedBenefitPlansDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DefinedBenefitPlansDomain", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined benefit plans [domain]", "label": "Defined benefit plans [domain]" } }, "en": { "role": { "documentation": "This member stands for post-employment benefit plans other than defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. It also represents the standard value for the 'Defined benefit plans' axis if no other member is used." } } }, "auth_ref": [ "r85" ] }, "bti_DefinedBenefitSchemesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DefinedBenefitSchemesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "audit of defined benefit schemes of the Company", "label": "Defined Benefit Schemes [Member]", "documentation": "Defined benefit schemes." } } }, "auth_ref": [] }, "bti_DepreciationAmortisationAndImpairmentCostsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DepreciationAmortisationAndImpairmentCostsAbstract", "lang": { "en-us": { "role": { "label": "Depreciation Amortisation And Impairment Costs [Abstract]", "documentation": "Depreciation amortisation and impairment costs." } } }, "auth_ref": [] }, "bti_DepreciationAmortisationAndImpairmentCostsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DepreciationAmortisationAndImpairmentCostsLineItems", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Depreciation Amortisation And Impairment Costs [Line Items]", "label": "Depreciation Amortisation And Impairment Costs [Line Items]", "documentation": "Depreciation amortisation and impairment costs." } } }, "auth_ref": [] }, "bti_DepreciationAmortisationAndImpairmentCostsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DepreciationAmortisationAndImpairmentCostsTable", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Depreciation Amortisation And Impairment Costs [Table]", "label": "Depreciation Amortisation And Impairment Costs [Table]", "documentation": "Depreciation amortisation and impairment costs." } } }, "auth_ref": [] }, "ifrs-full_DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DepreciationAmortisationAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": -1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Depreciation, amortisation and impairment costs", "terseLabel": "Depreciation, amortisation and impairment", "label": "Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss" } }, "en": { "role": { "documentation": "The amount of depreciation expense, amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss. [Refer: Depreciation and amortisation expense; Impairment loss (reversal of impairment loss) recognised in profit or loss]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_DepreciationPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DepreciationPropertyPlantAndEquipmentIncludingRightofuseAssets", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Depreciation", "label": "Depreciation, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The amount of depreciation of property, plant and equipment including right-of-use assets. [Refer: Depreciation and amortisation expense; Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "ifrs-full_DepreciationRatePropertyPlantAndEquipment": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DepreciationRatePropertyPlantAndEquipment", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property plant and equipment depreciation rates", "label": "Depreciation rate, property, plant and equipment" } }, "en": { "role": { "documentation": "The depreciation rate used for property, plant and equipment. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r76" ] }, "bti_DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsAbstract", "lang": { "en-us": { "role": { "label": "Derivative Financial Asset And Liabilities Offsetting Arrangements [Abstract]", "documentation": "Derivative financial asset and liabilities offsetting arrangements." } } }, "auth_ref": [] }, "bti_DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsLineItems", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]", "label": "Derivative Financial Asset And Liabilities Offsetting Arrangements [Line Items]", "documentation": "Derivative financial asset and liabilities offsetting arrangements." } } }, "auth_ref": [] }, "bti_DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsTable", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative Financial Asset And Liabilities Offsetting Arrangements [Table]", "label": "Derivative Financial Asset And Liabilities Offsetting Arrangements [Table]", "documentation": "Derivative financial asset and liabilities offsetting arrangements." } } }, "auth_ref": [] }, "ifrs-full_DerivativeFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DerivativeFinancialAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Assets", "terseLabel": "Assets", "verboseLabel": "Amount presented in the Group balance sheet, assets", "label": "Derivative financial assets" } }, "en": { "role": { "documentation": "The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]" } } }, "auth_ref": [ "r581" ] }, "bti_DerivativeFinancialAssetsGrossSettledInflows": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetsGrossSettledInflows", "crdr": "debit", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets inflow", "label": "Derivative Financial Assets Gross Settled Inflows", "documentation": "Derivative financial assets gross settled inflows." } } }, "auth_ref": [] }, "bti_DerivativeFinancialAssetsGrossSettledOutflows": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetsGrossSettledOutflows", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Assets outflow", "label": "Derivative Financial Assets Gross Settled Outflows", "documentation": "Derivative financial assets gross settled outflows." } } }, "auth_ref": [] }, "bti_DerivativeFinancialAssetsRelatedToNetDebt": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialAssetsRelatedToNetDebt", "crdr": "debit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": "ifrs-full_DerivativeFinancialAssets", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets, Derivatives - in respect of net debt", "label": "Derivative Financial Assets Related To Net Debt", "documentation": "Derivative financial assets related to net debt." } } }, "auth_ref": [] }, "ifrs-full_DerivativeFinancialLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DerivativeFinancialLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Liabilities", "terseLabel": "Liabilities", "negatedLabel": "Amount presented in the Group balance sheet, liabilities", "label": "Derivative financial liabilities" } }, "en": { "role": { "documentation": "The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]" } } }, "auth_ref": [ "r581" ] }, "bti_DerivativeFinancialLiabilitiesGrossSettledInflows": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialLiabilitiesGrossSettledInflows", "crdr": "debit", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities inflow", "label": "Derivative Financial Liabilities Gross Settled Inflows", "documentation": "Derivative financial liabilities gross settled inflows." } } }, "auth_ref": [] }, "bti_DerivativeFinancialLiabilitiesGrossSettledOutflows": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialLiabilitiesGrossSettledOutflows", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities outflow", "negatedTerseLabel": "Liabilities outflow", "label": "Derivative Financial Liabilities Gross Settled Outflows", "documentation": "Derivative financial liabilities gross settled outflows." } } }, "auth_ref": [] }, "bti_DerivativeFinancialLiabilitiesRelatedToNetDebt": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeFinancialLiabilitiesRelatedToNetDebt", "crdr": "credit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": "ifrs-full_DerivativeFinancialLiabilities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities, Derivatives - in respect of net debt", "label": "Derivative Financial Liabilities Related To Net Debt", "documentation": "Derivative financial liabilities related to net debt." } } }, "auth_ref": [] }, "bti_DerivativeInstrumentAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeInstrumentAdjustments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of derivative financial instruments", "label": "Derivative Instrument Adjustments", "documentation": "Derivative instrument adjustments." } } }, "auth_ref": [] }, "bti_DerivativeRelatedNetInvestmentHedgesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeRelatedNetInvestmentHedgesMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net investment hedges (derivative related)", "label": "Derivative Related Net Investment Hedges [Member]", "documentation": "Derivative related net investment hedges." } } }, "auth_ref": [] }, "bti_DerivativeRelatedToNetDebtMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DerivativeRelatedToNetDebtMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Derivatives in respect of net debt", "label": "Derivative Related To Net Debt [Member]", "documentation": "Derivative related to net debt." } } }, "auth_ref": [] }, "ifrs-full_DerivativesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DerivativesMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Derivatives", "label": "Derivatives [member]" } }, "en": { "role": { "documentation": "This member stands for financial instruments or other contracts within the scope of IFRS 9 with all three of the following characteristics: (a) Their value changes in response to the change in a specified interest rate, financial instrument price, commodity price, foreign exchange rate, index of prices or rates, credit rating or credit index, or other variable, provided in the case of a non-financial variable that the variable is not specific to a party to the contract (sometimes called the \u2018underlying\u2019); (b) They require no initial net investment or an initial net investment that is smaller than would be required for other types of contracts that would be expected to have a similar response to changes in market factors; (c) They are settled at a future date. [Refer: Classes of financial instruments [domain]]" } } }, "auth_ref": [ "r427", "r432", "r448", "r456" ] }, "bti_DescriptionOfAccountingPolicyForAdjustingItemsExplanatoryPolicyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DescriptionOfAccountingPolicyForAdjustingItemsExplanatoryPolicyTextBlock", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusting items", "label": "Description Of Accounting Policy For Adjusting Items Explanatory [Policy Text Block]", "documentation": "Description of accounting policy for adjusting items." } } }, "auth_ref": [] }, "bti_DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatoryPolicyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatoryPolicyTextBlock", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Basis of consolidation", "label": "Description Of Accounting Policy For Basis Of Consolidation Explanatory [Policy Text Block]", "documentation": "Description of accounting policy for basis of consolidation." } } }, "auth_ref": [] }, "bti_DescriptionOfAccountingPolicyForBasisOfPreparationExplanatoryPolicyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DescriptionOfAccountingPolicyForBasisOfPreparationExplanatoryPolicyTextBlock", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Basis of preparation", "label": "Description Of Accounting Policy For Basis Of Preparation Explanatory [Policy Text Block]", "documentation": "Description Of Accounting Policy For Basis Of Preparation." } } }, "auth_ref": [] }, "ifrs-full_DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Biological assets", "label": "Description of accounting policy for biological assets [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for biological assets. [Refer: Biological assets]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForBorrowingCostsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForBorrowingCostsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Capitalised interest", "label": "Description of accounting policy for borrowing costs [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for interest and other costs that the entity incurs in connection with the borrowing of funds." } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForContingentLiabilitiesAndContingentAssetsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Contingent liabilities and contingent assets", "label": "Description of accounting policy for contingent liabilities and contingent assets [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for contingent liabilities and contingent assets. [Refer: Classes of contingent liabilities [domain]; Description of nature of contingent assets]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForDeferredIncomeTaxExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred taxation", "label": "Description of accounting policy for deferred income tax [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for deferred income tax. [Refer: Deferred tax expense (income)]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForDividendsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForDividendsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Dividends", "label": "Description of accounting policy for dividends [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for dividends. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital." } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForEmployeeBenefitsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefit schemes", "label": "Description of accounting policy for employee benefits [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for employee benefits. Employee benefits are all forms of consideration given by an entity in exchange for services rendered by employees or for the termination of employment." } } }, "auth_ref": [ "r579" ] }, "bti_DescriptionOfAccountingPolicyForEquityInstrumentsExplanatoryPolicyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DescriptionOfAccountingPolicyForEquityInstrumentsExplanatoryPolicyTextBlock", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Equity instruments", "label": "Description Of Accounting Policy For Equity Instruments Explanatory [Policy Text Block]", "documentation": "Description of accounting policy for equity instruments." } } }, "auth_ref": [] }, "ifrs-full_DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Financial instruments", "label": "Description of accounting policy for financial instruments [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for financial instruments. [Refer: Classes of financial instruments [domain]]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign currencies", "label": "Description of accounting policy for foreign currency translation [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for foreign currency translation." } } }, "auth_ref": [ "r579" ] }, "bti_DescriptionOfAccountingPolicyForFutureChangesToAccountingPoliciesExplanatoryPolicyTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DescriptionOfAccountingPolicyForFutureChangesToAccountingPoliciesExplanatoryPolicyTextBlock", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Future changes to accounting policies", "label": "Description Of Accounting Policy For Future Changes To Accounting Policies Explanatory [Policy Text Block]", "documentation": "Description of accounting policy for future changes to accounting policies explanatory." } } }, "auth_ref": [] }, "ifrs-full_DescriptionOfAccountingPolicyForGoodwillExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForGoodwillExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Goodwill", "label": "Description of accounting policy for goodwill [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for goodwill. [Refer: Goodwill]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForImpairmentOfFinancialAssetsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment of financial assets held at amortized cost", "label": "Description of accounting policy for impairment of financial assets [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for the impairment of financial assets. [Refer: Financial assets]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForImpairmentOfNonfinancialAssetsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment of non-financial assets", "label": "Description of accounting policy for impairment of non-financial assets [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for the impairment of non-financial assets. [Refer: Financial assets]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForIncomeTaxExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForIncomeTaxExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Taxation", "label": "Description of accounting policy for income tax [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for income tax." } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForIntangibleAssetsOtherThanGoodwillExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets other than goodwill", "label": "Description of accounting policy for intangible assets other than goodwill [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForLeasesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForLeasesExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Leased assets and lease liabilities", "label": "Description of accounting policy for leases [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for leases. A lease is an agreement whereby the lessor conveys to the lessee in return for a payment or series of payments the right to use an asset for an agreed period of time." } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForMeasuringInventories": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForMeasuringInventories", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Inventories", "label": "Description of accounting policy for measuring inventories [text block]" } }, "en": { "role": { "documentation": "The description of the entity's accounting policy for measuring inventories. [Refer: Inventories]" } } }, "auth_ref": [ "r105" ] }, "ifrs-full_DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment", "label": "Description of accounting policy for property, plant and equipment [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for property, plant and equipment. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForProvisionsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForProvisionsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Provisions", "label": "Description of accounting policy for provisions [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for provisions. [Refer: Provisions]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForRecognitionOfRevenue": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForRecognitionOfRevenue", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Revenue", "label": "Description of accounting policy for recognition of revenue [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for recognising revenue. [Refer: Revenue]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Research and development", "label": "Description of accounting policy for research and development expense [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for research and development expense. [Refer: Research and development expense]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForSegmentReportingExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForSegmentReportingExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Segmental analysis", "label": "Description of accounting policy for segment reporting [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for segment reporting." } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Share-based payments", "label": "Description of accounting policy for share-based payment transactions [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Types of share-based payment arrangements [domain]]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfAccountingPolicyForTreasurySharesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfAccountingPolicyForTreasurySharesExplanatory", "presentation": [ "http://www.bat.com/role/AccountingpoliciesPolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Repurchase of share capital", "label": "Description of accounting policy for treasury shares [text block]" } }, "en": { "role": { "documentation": "The description of the entity's material accounting policy information for treasury shares. [Refer: Treasury shares]" } } }, "auth_ref": [ "r579" ] }, "ifrs-full_DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfDiscountRatesUsedInCurrentEstimateOfValueInUse", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pre-tax discount rates", "label": "Discount rate used in current estimate of value in use" } }, "en": { "role": { "documentation": "The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit." } } }, "auth_ref": [ "r148" ] }, "ifrs-full_DescriptionOfExpectedVolatilityShareOptionsGranted": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfExpectedVolatilityShareOptionsGranted", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expected volatility (%)", "label": "Expected volatility, share options granted" } }, "en": { "role": { "documentation": "The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time." } } }, "auth_ref": [ "r270" ] }, "ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Long-term growth rates", "label": "Growth rate used to extrapolate cash flow projections" } }, "en": { "role": { "documentation": "The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Total for all cash-generating units [member]]" } } }, "auth_ref": [ "r151", "r153" ] }, "ifrs-full_DescriptionOfLineItemInStatementOfFinancialPositionThatIncludesHedgingInstrument": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfLineItemInStatementOfFinancialPositionThatIncludesHedgingInstrument", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Line item in the statement of financial position where the hedged item is included", "label": "Description of line item in statement of financial position that includes hedging instrument" } }, "en": { "role": { "documentation": "The description of the line item in the statement of financial position that includes the hedging instrument. [Refer: Hedging instruments [domain]]" } } }, "auth_ref": [ "r293" ] }, "ifrs-full_DescriptionOfRiskFreeInterestRateShareOptionsGranted": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DescriptionOfRiskFreeInterestRateShareOptionsGranted", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Risk-free rate (%)", "label": "Risk free interest rate, share options granted" } }, "en": { "role": { "documentation": "The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]" } } }, "auth_ref": [ "r270" ] }, "bti_DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DetailedDisclosureOfTradeAndOtherPayablesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Trade and Other Payables", "label": "Detailed Disclosure Of Trade And Other Payables Explanatory [Table Text Block]", "documentation": "Detailed disclosure of trade and other payables." } } }, "auth_ref": [] }, "bti_DetailsOfTheEntityBeingDisposedOffAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DetailsOfTheEntityBeingDisposedOffAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Details of the Entity Being Disposed Off [Axis]", "label": "Details of the Entity Being Disposed Off [Axis]", "documentation": "Details of the entity being disposed off." } } }, "auth_ref": [] }, "bti_DetailsOfTheEntityBeingDisposedOffDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DetailsOfTheEntityBeingDisposedOffDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Details of the Entity Being Disposed Off [Domain]", "label": "Details of the Entity Being Disposed Off [Domain]", "documentation": "Details Of The Entity Being Disposed Off [Domain]" } } }, "auth_ref": [] }, "bti_DifferenceOnExchangeOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DifferenceOnExchangeOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Difference on exchange", "label": "Difference On Exchange Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Difference on exchange of investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "bti_DifferenceOnExchangeRelatingToEgyptMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DifferenceOnExchangeRelatingToEgyptMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Exchange difference relating to Egypt", "label": "Difference On Exchange Relating To Egypt [Member]", "documentation": "Difference On Exchange Relating To Egypt" } } }, "auth_ref": [] }, "bti_DifferenceOnExchangeRelatingToOtherEntitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DifferenceOnExchangeRelatingToOtherEntitiesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Difference on exchange relating to other entities", "label": "Difference On Exchange Relating To Other Entities [Member]", "documentation": "Difference on exchange relating to other entities." } } }, "auth_ref": [] }, "ifrs-full_DilutedEarningsLossPerShare": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DilutedEarningsLossPerShare", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 8.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 25.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails", "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Diluted (loss)/earnings per share (in GBP per share)", "totalLabel": "Diluted earnings/(loss) per share (in GBP per share)", "label": "Diluted earnings (loss) per share" } }, "en": { "role": { "documentation": "The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]" } } }, "auth_ref": [ "r135", "r136" ] }, "ifrs-full_DilutedEarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DilutedEarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Diluted earnings per share [abstract]", "label": "Diluted earnings per share [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares": { "xbrltype": "sharesItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": "ifrs-full_AdjustedWeightedAverageShares", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share options, Weighted average number of shares (in shares)", "label": "Dilutive effect of share options on weighted average number of ordinary shares" } }, "en": { "role": { "documentation": "The potential dilutive effect on the weighted average number of ordinary shares that relate to the assumed exercise of the entity's share options." } } }, "auth_ref": [ "r605" ] }, "bti_DisclosureOfAccountingPoliciesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAccountingPoliciesAbstract", "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Accounting Policies [Abstract]", "label": "Disclosure Of Accounting Policies [Abstract]", "documentation": "Disclosure Of Accounting Policies [Abstract]" } } }, "auth_ref": [] }, "bti_DisclosureOfAccountingPoliciesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAccountingPoliciesLineItems", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Accounting Policies [Line Items]", "label": "Disclosure Of Accounting Policies [Line Items]", "documentation": "Disclosure Of Accounting Policies" } } }, "auth_ref": [] }, "bti_DisclosureOfAccountingPoliciesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAccountingPoliciesTable", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Accounting Policies [Table]", "label": "Disclosure Of Accounting Policies [Table]", "documentation": "Disclosure Of Accounting Policies" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesExplanatory", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Amounts Incurred by Entity for Provision of Key Management Personnel Services", "label": "Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [text block]" } }, "en": { "role": { "documentation": "The disclosure of amounts incurred by the entity for provision of key management personnel services that are provided by separate management entities. [Refer: Key management personnel of entity or parent [member]; Separate management entities [domain]]" } } }, "auth_ref": [ "r120" ] }, "ifrs-full_DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesLineItems", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Amounts Incurred By Entity For Provision Of Key Management Personnel Services Provided By Separate Management Entities [Line Items]", "label": "Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAmountsIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntitiesTable", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Amounts Incurred By Entity For Provision Of Key Management Personnel Services Provided By Separate Management Entities [Table]", "label": "Disclosure of amounts incurred by entity for provision of key management personnel services provided by separate management entities [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the amounts incurred by the entity for provision of key management personnel services that are provided by separate management entities." } } }, "auth_ref": [ "r120" ] }, "bti_DisclosureOfAnalysisOfBorrowingsByCurrencyExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAnalysisOfBorrowingsByCurrencyExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Analysis of Borrowings by Currency", "label": "Disclosure Of Analysis Of Borrowings By Currency Explanatory [Table Text Block]", "documentation": "The disclosure of analysis of borrowings by currency." } } }, "auth_ref": [] }, "bti_DisclosureOfAnalysisOfBorrowingsByInterestRateChangesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAnalysisOfBorrowingsByInterestRateChangesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Analysis of Borrowings by Interest Rate Changes", "label": "Disclosure Of Analysis Of Borrowings By Interest Rate Changes Explanatory [Table Text Block]", "documentation": "Disclosure of analysis of borrowings by interest rate changes." } } }, "auth_ref": [] }, "bti_DisclosureOfAnalysisOfMovementsNetDebtExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAnalysisOfMovementsNetDebtExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Analysis of Net Debt Movements Along with Reconciliation to the Financing Activities in the Group Cash Flow Statement", "label": "Disclosure Of Analysis Of Movements Net Debt Explanatory [Table Text Block]", "documentation": "The disclosure of analysis of net debt movements." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of analysis of other comprehensive income by item [line items]", "label": "Disclosure of analysis of other comprehensive income by item [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of analysis of other comprehensive income by item [table]", "label": "Disclosure of analysis of other comprehensive income by item [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the analysis of other comprehensive income by item." } } }, "auth_ref": [ "r7" ] }, "bti_DisclosureOfAssociateAndJointVentureResultsAndOtherComprehensiveIncomeLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAssociateAndJointVentureResultsAndOtherComprehensiveIncomeLineItems", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Associate and Joint Venture Results and Other Comprehensive Income [Line Items]", "label": "Disclosure Of Associate And Joint Venture Results And Other Comprehensive Income [Line Items]", "documentation": "Disclosure of associate and joint venture results and other comprehensive income." } } }, "auth_ref": [] }, "bti_DisclosureOfAssociateAndJointVentureResultsAndOtherComprehensiveIncomeTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAssociateAndJointVentureResultsAndOtherComprehensiveIncomeTable", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Associate And Joint Venture Results And Other Comprehensive Income [Table]", "label": "Disclosure Of Associate And Joint Venture Results And Other Comprehensive Income [Table]", "documentation": "Schedule disclosing information related to associate and joint venture results and other comprehensive income." } } }, "auth_ref": [] }, "bti_DisclosureOfAssociatesAndJointVenturesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfAssociatesAndJointVenturesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Associates And Joint Ventures [Abstract]", "documentation": "Disclosure of associates and joint ventures." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of attribution of expenses by nature to their function [line items]", "label": "Disclosure of attribution of expenses by nature to their function [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of attribution of expenses by nature to their function [table]", "label": "Disclosure of attribution of expenses by nature to their function [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to attribution of expenses by nature to analysis of expenses by function in the statement of profit or loss." } } }, "auth_ref": [ "r575", "r578" ] }, "ifrs-full_DisclosureOfAuditorsRemunerationExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfAuditorsRemunerationExplanatory", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Auditor\"s Remuneration", "label": "Disclosure of auditors' remuneration [text block]" } }, "en": { "role": { "documentation": "The disclosure of compensation to the entity's auditors." } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfBorrowingsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfBorrowingsExplanatory", "presentation": [ "http://www.bat.com/role/Borrowings" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowings", "label": "Disclosure of borrowings [text block]" } }, "en": { "role": { "documentation": "The disclosure of borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfBusinessCombinationsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfBusinessCombinationsAbstract", "lang": { "en-us": { "role": { "terseLabel": "Disclosure of detailed information about business combination [abstract]", "label": "Disclosure of detailed information about business combination [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfBusinessCombinationsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfBusinessCombinationsExplanatory", "presentation": [ "http://www.bat.com/role/ChangesintheGroup" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in the Group", "label": "Disclosure of business combinations [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for business combinations." } } }, "auth_ref": [ "r285" ] }, "ifrs-full_DisclosureOfBusinessCombinationsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfBusinessCombinationsLineItems", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Business Combinations [Line Items]", "label": "Disclosure of detailed information about business combination [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfBusinessCombinationsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfBusinessCombinationsTable", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAcquisitionsDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Business Combinations [Table]", "label": "Disclosure of detailed information about business combination [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to details of business combinations." } } }, "auth_ref": [ "r279" ] }, "bti_DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/CapitalandreservesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Capital and Reserves - Reconciliation of Movement in Total Equity", "label": "Disclosure Of Capital And Reserve Reconciliation Of Movement In Equity Explanatory [Table Text Block]", "documentation": "Disclosure of capital and reserve reconciliation of movement in total equity." } } }, "auth_ref": [] }, "bti_DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityLineItems", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Capital And Reserve Reconciliation Of Movement In Equity [Line Items]", "label": "Disclosure Of Capital And Reserve Reconciliation Of Movement In Equity [Line Items]", "documentation": "Disclosure of capital and reserve reconciliation of movement in total equity." } } }, "auth_ref": [] }, "bti_DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCapitalAndReserveReconciliationOfMovementInEquityTable", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Capital And Reserve Reconciliation Of Movement In Equity [Table]", "label": "Disclosure Of Capital And Reserve Reconciliation Of Movement In Equity [Table]", "documentation": "Disclosure of capital and reserve reconciliation of movement in total equity." } } }, "auth_ref": [] }, "bti_DisclosureOfCasesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCasesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Cases", "label": "Disclosure Of Cases Explanatory [Table Text Block]", "documentation": "The disclosure of cases." } } }, "auth_ref": [] }, "bti_DisclosureOfCashAndCashEquivalentsDenominatedCurrencyExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCashAndCashEquivalentsDenominatedCurrencyExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/CashandcashequivalentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Cash and Cash Equivalents Denominated in the Functional Currency of the Subsidiary Undertaking or Other Currencies", "label": "Disclosure Of Cash And Cash Equivalents Denominated Currency Explanatory [Table Text Block]", "documentation": "Disclosure of cash and cash equivalents denominated currency." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfCashAndCashEquivalentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfCashAndCashEquivalentsExplanatory", "presentation": [ "http://www.bat.com/role/Cashandcashequivalents" ], "lang": { "en-us": { "role": { "terseLabel": "Cash and cash equivalents", "label": "Disclosure of cash and cash equivalents [text block]" } }, "en": { "role": { "documentation": "The disclosure of cash and cash equivalents. [Refer: Cash and cash equivalents]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCashBankBalancesAndCashEquivalentsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/CashandcashequivalentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule Representing Cash and Cash Equivalents", "label": "Disclosure Of Cash Bank Balances And Cash Equivalents Explanatory [Table Text Block]", "documentation": "The disclosure of cash, bank balances and cash equivalents." } } }, "auth_ref": [] }, "bti_DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfClassesOfInventoriesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InventoriesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Inventories", "label": "Disclosure Of Classes Of Inventories Explanatory [Table Text Block]", "documentation": "Disclosure of classes of inventories explanatory." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfClassesOfShareCapitalLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfClassesOfShareCapitalLineItems", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of classes of share capital [line items]", "label": "Disclosure of classes of share capital [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfClassesOfShareCapitalTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfClassesOfShareCapitalTable", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of classes of share capital [table]", "label": "Disclosure of classes of share capital [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to classes of share capital." } } }, "auth_ref": [ "r36" ] }, "bti_DisclosureOfCommitmentsAndContingenciesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCommitmentsAndContingenciesAbstract", "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Commitments And Contingencies [Abstract]", "label": "Disclosure Of Commitments And Contingencies [Abstract]", "documentation": "Disclosure of commitments and contingencies." } } }, "auth_ref": [] }, "bti_DisclosureOfCommitmentsAndContingenciesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCommitmentsAndContingenciesLineItems", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Commitments And Contingencies [Line Items]", "label": "Disclosure Of Commitments And Contingencies [Line Items]", "documentation": "Disclosure of commitments and contingencies." } } }, "auth_ref": [] }, "bti_DisclosureOfCommitmentsAndContingenciesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCommitmentsAndContingenciesTable", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Commitments And Contingencies [Table]", "label": "Disclosure Of Commitments And Contingencies [Table]", "documentation": "Disclosure of commitments and contingencies." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfCommitmentsAndContingentLiabilitiesExplanatory", "presentation": [ "http://www.bat.com/role/Contingentliabilitiesandfinancialcommitments" ], "lang": { "en-us": { "role": { "terseLabel": "Contingent liabilities and financial commitments", "label": "Disclosure of commitments and contingent liabilities [text block]" } }, "en": { "role": { "documentation": "The disclosure of commitments and contingent liabilities. [Refer: Classes of contingent liabilities [domain]]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfCondensedConsolidatedBalanceSheetExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCondensedConsolidatedBalanceSheetExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information of Balance Sheet", "label": "Disclosure Of Condensed Consolidated Balance Sheet Explanatory [Table Text Block]", "documentation": "Disclosure of Condensed Consolidated Balance Sheet." } } }, "auth_ref": [] }, "bti_DisclosureOfCondensedConsolidatedIncomeStatementExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCondensedConsolidatedIncomeStatementExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information of Income Statement", "label": "Disclosure Of Condensed Consolidated Income Statement Explanatory [Table Text Block]", "documentation": "Disclosure of Condensed Consolidated Income Statement." } } }, "auth_ref": [] }, "bti_DisclosureOfCondensedConsolidatingFinancialInformationAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCondensedConsolidatingFinancialInformationAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Condensed Consolidating Financial Information [Abstract]", "documentation": "Disclosure of condensed consolidating financial information." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfConsolidatedAndSeparateFinancialStatementsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfConsolidatedAndSeparateFinancialStatementsExplanatory", "presentation": [ "http://www.bat.com/role/SummarisedfinancialInformation" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised financial information", "label": "Disclosure of information about separate financial statements [text block]" } }, "en": { "role": { "documentation": "The disclosure of information about separate financial statements." } } }, "auth_ref": [ "r134", "r229" ] }, "ifrs-full_DisclosureOfContingentLiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfContingentLiabilitiesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of contingent liabilities [abstract]" } } }, "auth_ref": [] }, "bti_DisclosureOfCurrentAssetsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfCurrentAssetsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Breakdown of Current Assets", "label": "Disclosure Of Current Assets Explanatory [Table Text Block]", "documentation": "Disclosure of current assets." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDeferredTaxesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDeferredTaxesExplanatory", "presentation": [ "http://www.bat.com/role/Deferredtax" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax", "label": "Disclosure of deferred taxes [text block]" } }, "en": { "role": { "documentation": "The disclosure of deferred taxes. [Refer: Deferred tax liabilities; Deferred tax assets]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfDefinedBenefitPlansAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDefinedBenefitPlansAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of defined benefit plans [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDefinedBenefitPlansExplanatory", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Defined Benefit Amounts Recognised in Income Statement", "label": "Disclosure of defined benefit plans [text block]" } }, "en": { "role": { "documentation": "The disclosure of defined benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r85" ] }, "ifrs-full_DisclosureOfDefinedBenefitPlansLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDefinedBenefitPlansLineItems", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Defined Benefit Plans [Line Items]", "label": "Disclosure of defined benefit plans [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDefinedBenefitPlansTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDefinedBenefitPlansTable", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Defined Benefit Plans [Table]", "label": "Disclosure of defined benefit plans [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to defined benefit plans." } } }, "auth_ref": [ "r85" ] }, "bti_DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDepreciationAmortisationAndImpairmentExpenseExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/DepreciationamortisationandimpairmentcostsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Depreciation Amortisation and Impairment Costs", "label": "Disclosure Of Depreciation Amortisation And Impairment Expense Explanatory [Table Text Block]", "documentation": "The disclosure of depreciation amortisation and impairment expense." } } }, "auth_ref": [] }, "bti_DisclosureOfDepreciationAmortizationAndImpairmentAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDepreciationAmortizationAndImpairmentAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Depreciation Amortization And Impairment [Abstract]", "documentation": "Disclosure of depreciation amortization and impairment." } } }, "auth_ref": [] }, "bti_DisclosureOfDepreciationAmortizationAndImpairmentLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDepreciationAmortizationAndImpairmentLineItems", "presentation": [ "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Depreciation Amortization And Impairment [Line Items]", "label": "Disclosure Of Depreciation Amortization And Impairment [Line Items]", "documentation": "Disclosure of depreciation amortization and impairment line items." } } }, "auth_ref": [] }, "bti_DisclosureOfDepreciationAmortizationAndImpairmentTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDepreciationAmortizationAndImpairmentTable", "presentation": [ "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Depreciation Amortization And Impairment [Table]", "label": "Disclosure Of Depreciation Amortization And Impairment [Table]", "documentation": "Disclosure of depreciation amortization and impairment" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDepreciationAndAmortisationExpenseExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDepreciationAndAmortisationExpenseExplanatory", "presentation": [ "http://www.bat.com/role/Depreciationamortisationandimpairmentcosts" ], "lang": { "en-us": { "role": { "terseLabel": "Depreciation, amortisation and impairment costs", "label": "Disclosure of depreciation and amortisation expense [text block]" } }, "en": { "role": { "documentation": "The disclosure of depreciation and amortisation expense. [Refer: Depreciation and amortisation expense]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfDerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDerivativeFinancialAssetAndLiabilitiesOffsettingArrangementsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Derivative Financial Asset and Liabilities Offsetting Arrangements", "label": "Disclosure Of Derivative Financial Asset And Liabilities Offsetting Arrangements Explanatory [Table Text Block]", "documentation": "Disclosure of derivative financial asset and liabilities offsetting arrangements." } } }, "auth_ref": [] }, "bti_DisclosureOfDerivativeFinancialInstrumentsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDerivativeFinancialInstrumentsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Derivative Financial Instruments [Abstract]", "documentation": "Disclosure Of Derivative Financial Instruments [Abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDerivativeFinancialInstrumentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDerivativeFinancialInstrumentsExplanatory", "presentation": [ "http://www.bat.com/role/Derivativefinancialinstruments" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative financial instruments", "label": "Disclosure of derivative financial instruments [text block]" } }, "en": { "role": { "documentation": "The disclosure of derivative financial instruments. [Refer: Derivatives [member]]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfDerivativeFinancialInstrumentsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDerivativeFinancialInstrumentsLineItems", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Derivative Financial Instruments [Line Items]", "label": "Disclosure Of Derivative Financial Instruments [Line Items]", "documentation": "Disclosure of derivative financial instruments." } } }, "auth_ref": [] }, "bti_DisclosureOfDerivativeFinancialInstrumentsMaturityAnalysisExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDerivativeFinancialInstrumentsMaturityAnalysisExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/DerivativefinancialinstrumentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of maturity dates of derivative financial instruments", "label": "Disclosure Of Derivative Financial Instruments Maturity Analysis Explanatory [Table Text Block]", "documentation": "Disclosure of derivative financial instruments maturity analysis." } } }, "auth_ref": [] }, "bti_DisclosureOfDerivativeFinancialInstrumentsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDerivativeFinancialInstrumentsTable", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Derivative Financial Instruments [Table]", "label": "Disclosure Of Derivative Financial Instruments [Table]", "documentation": "Disclosure of derivative financial instruments." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutAverageNumberOfEmployeesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutAverageNumberOfEmployeesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/GroupemployeesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Average Number of Persons Employed by Group and Associates", "label": "Disclosure Of Detailed Information About Average Number Of Employees Explanatory [Table Text Block]", "documentation": "The disclosure of detailed information about average number of employees." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutBorrowingsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of detailed information about borrowings [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutBorrowingsExplanatory", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Detailed Information About Borrowings", "label": "Disclosure of detailed information about borrowings [text block]" } }, "en": { "role": { "documentation": "The disclosure of detailed information about borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r627" ] }, "ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutBorrowingsLineItems", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Detailed Information About Borrowings [Line Items]", "label": "Disclosure of detailed information about borrowings [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutBorrowingsTable", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Detailed Information About Borrowings [Table]", "label": "Disclosure of detailed information about borrowings [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to details of borrowings." } } }, "auth_ref": [ "r627" ] }, "bti_DisclosureOfDetailedInformationAboutDepreciationAmortizationAndImpairmentExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutDepreciationAmortizationAndImpairmentExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SegmentalanalysesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Depreciation Amortisation and Impairment Charges", "label": "Disclosure Of Detailed Information About Depreciation Amortization And Impairment Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about depreciation amortization and impairment explanatory." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutFreeholdLandExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutFreeholdLandExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/PropertyplantandequipmentTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Cost of Freehold Land", "label": "Disclosure Of Detailed Information About Freehold Land Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about freehold land." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutHedgedItemsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of detailed information about hedged items [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutHedgedItemsExplanatory", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Detailed Information About Hedged Items by Risk Category", "label": "Disclosure of detailed information about hedged items [text block]" } }, "en": { "role": { "documentation": "The disclosure of detailed information about hedged items. [Refer: Hedged items [domain]]" } } }, "auth_ref": [ "r301" ] }, "ifrs-full_DisclosureOfDetailedInformationAboutHedgedItemsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutHedgedItemsTable", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Detailed Information About Hedged Items [Table]", "label": "Disclosure of detailed information about hedged items [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to details of hedged items." } } }, "auth_ref": [ "r301" ] }, "ifrs-full_DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutHedgingInstrumentsExplanatory", "presentation": [ "http://www.bat.com/role/DerivativefinancialinstrumentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of items designated as hedging instruments", "label": "Disclosure of detailed information about hedging instruments [text block]" } }, "en": { "role": { "documentation": "The disclosure of detailed information about hedging instruments. [Refer: Hedging instruments [domain]]" } } }, "auth_ref": [ "r296" ] }, "bti_DisclosureOfDetailedInformationAboutImpairmentChargeFromPossibleChangeInAssumptionsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutImpairmentChargeFromPossibleChangeInAssumptionsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/IntangibleassetsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Impairment Charge From Possible Change in Assumptions", "label": "Disclosure Of Detailed Information About Impairment Charge From Possible Change In Assumptions Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about impairment charge from possible change in assumptions." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutLeaseholdLandAndPropertyComprisesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutLeaseholdLandAndPropertyComprisesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/PropertyplantandequipmentTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Leasehold Land and Property Comprises", "label": "Disclosure Of Detailed Information About Leasehold Land And Property Comprises Explanatory [Table Text Block]", "documentation": "The disclosure of leasehold land and property comprises." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutLeaseholdPropertyNetBookValueMovementsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutLeaseholdPropertyNetBookValueMovementsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/PropertyplantandequipmentTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Leasehold Property Net Book Value Movements", "label": "Disclosure Of Detailed Information About Leasehold Property Net Book Value Movements Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about leasehold property net book value movements." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory", "presentation": [ "http://www.bat.com/role/PropertyplantandequipmentTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Property, Plant and Equipment", "label": "Disclosure of detailed information about property, plant and equipment [text block]" } }, "en": { "role": { "documentation": "The disclosure of detailed information about property, plant and equipment. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r82" ] }, "bti_DisclosureOfDetailedInformationAboutRepaymentOfBorrowingsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutRepaymentOfBorrowingsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Detailed Information About Repayment of Borrowings", "label": "Disclosure Of Detailed Information About Repayment Of Borrowings Explanatory [Table Text Block]", "documentation": "The disclosure of detailed information about repayment of borrowings." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutRepaymentOfLeaseLiabilitiesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutRepaymentOfLeaseLiabilitiesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/BorrowingsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Detailed Information About Repayment of Lease Liabilities", "label": "Disclosure Of Detailed Information About Repayment Of Lease Liabilities Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about repayment of lease liabilities explanatory." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedInformationAboutSharePremiumAccountCapitalRedemptionReservesAndMergerReservesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedInformationAboutSharePremiumAccountCapitalRedemptionReservesAndMergerReservesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/CapitalandreservesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Composition of Share Premium Account, Capital Redemption Reserves and Merger Reserves", "label": "Disclosure Of Detailed Information About Share Premium Account Capital Redemption Reserves And Merger Reserves Explanatory [Table Text Block]", "documentation": "Disclosure of detailed information about share premium account, capital redemption reserves and merger reserves." } } }, "auth_ref": [] }, "bti_DisclosureOfDetailedSummaryOfTaxationOnOrdinaryActivitiesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfDetailedSummaryOfTaxationOnOrdinaryActivitiesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TaxationonordinaryactivitiesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Taxation on Ordinary Activities", "label": "Disclosure Of Detailed Summary Of Taxation On Ordinary Activities Explanatory [Table Text Block]", "documentation": "Disclosure of detailed summary of taxation on ordinary activities." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfEarningsPerShareExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfEarningsPerShareExplanatory", "presentation": [ "http://www.bat.com/role/Earningspershare" ], "lang": { "en-us": { "role": { "terseLabel": "Earnings per share", "label": "Disclosure of earnings per share [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for earnings per share." } } }, "auth_ref": [ "r140" ] }, "bti_DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfEmployeeBenefitCostsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/EmployeebenefitcostsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Employee Benefit Costs", "label": "Disclosure Of Employee Benefit Costs Explanatory [Table Text Block]", "documentation": "Disclosure of employee benefit costs." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfEmployeeBenefitsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfEmployeeBenefitsExplanatory", "presentation": [ "http://www.bat.com/role/Retirementbenefitschemes" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefit schemes", "label": "Disclosure of employee benefits [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for employee benefits." } } }, "auth_ref": [ "r104" ] }, "ifrs-full_DisclosureOfEntitysReportableSegmentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfEntitysReportableSegmentsExplanatory", "presentation": [ "http://www.bat.com/role/Segmentalanalyses" ], "lang": { "en-us": { "role": { "terseLabel": "Segmental analyses", "label": "Disclosure of entity's operating segments [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for operating segments." } } }, "auth_ref": [ "r345" ] }, "ifrs-full_DisclosureOfExpensesByNatureExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfExpensesByNatureExplanatory", "presentation": [ "http://www.bat.com/role/Otheroperatingexpenses" ], "lang": { "en-us": { "role": { "terseLabel": "Other operating expenses", "label": "Disclosure of expenses by nature [text block]" } }, "en": { "role": { "documentation": "The disclosure of expenses by nature. [Refer: Expenses, by nature]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesAbstract", "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Abstract]", "label": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Abstract]", "documentation": "Disclosure of fair value measurement of assets and liabilities." } } }, "auth_ref": [] }, "bti_DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Assets and Liabilities Measured at Fair Value", "label": "Disclosure Of Fair Value Measurement Of Assets And Liabilities Explanatory [Table Text Block]", "documentation": "The disclosure of the fair value measurement of assets and liabilities." } } }, "auth_ref": [] }, "bti_DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesLineItems", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]", "label": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]", "documentation": "Disclosure of fair value measurement of assets and liabilities." } } }, "auth_ref": [] }, "bti_DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFairValueMeasurementOfAssetsAndLiabilitiesTable", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table]", "label": "Disclosure Of Fair Value Measurement Of Assets And Liabilities [Table]", "documentation": "Schedule disclosing information related to the fair value measurement of assets and liabilities." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFairValueMeasurementOfLiabilitiesLineItems", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Fair Value Measurement Of Liabilities [Line Items]", "label": "Disclosure of fair value measurement of liabilities [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFairValueMeasurementOfLiabilitiesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFairValueMeasurementOfLiabilitiesTable", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Fair Value Measurement Of Liabilities [Table]", "label": "Disclosure of fair value measurement of liabilities [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the fair value measurement of liabilities." } } }, "auth_ref": [ "r234" ] }, "bti_DisclosureOfFinanceIncomeAndCostsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinanceIncomeAndCostsLineItems", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Finance Income And Costs [Line Items]", "label": "Disclosure Of Finance Income And Costs [Line Items]", "documentation": "Disclosure of finance income costs." } } }, "auth_ref": [] }, "bti_DisclosureOfFinanceIncomeCostsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinanceIncomeCostsTable", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Finance Income Costs [Table]", "label": "Disclosure Of Finance Income Costs [Table]", "documentation": "Disclosure of finance income costs." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFinanceIncomeExpenseExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinanceIncomeExpenseExplanatory", "presentation": [ "http://www.bat.com/role/Netfinancecosts" ], "lang": { "en-us": { "role": { "terseLabel": "Net finance costs", "label": "Disclosure of finance income (cost) [text block]" } }, "en": { "role": { "documentation": "The disclosure of finance income (cost). [Refer: Finance income (cost)]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1Abstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1Abstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Finance Lease And Operating Lease By Lessee1 [Abstract]", "documentation": "Disclosure of finance lease and operating lease by lessee one." } } }, "auth_ref": [] }, "bti_DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1LineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1LineItems", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Finance Lease And Operating Lease By Lessee1 [Line Items]", "label": "Disclosure Of Finance Lease And Operating Lease By Lessee1 [Line Items]", "documentation": "Disclosure of finance lease and operating lease by lessee one." } } }, "auth_ref": [] }, "bti_DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1Table": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinanceLeaseAndOperatingLeaseByLessee1Table", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Finance Lease And Operating Lease By Lessee1 [Table]", "label": "Disclosure Of Finance Lease And Operating Lease By Lessee1 [Table]", "documentation": "Disclosure of finance lease and operating lease by lessee one." } } }, "auth_ref": [] }, "bti_DisclosureOfFinancialAssetsAndLiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinancialAssetsAndLiabilitiesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Financial Assets And Liabilities [Abstract]", "documentation": "Disclosure of financial assets and liabilities." } } }, "auth_ref": [] }, "bti_DisclosureOfFinancialAssetsAndLiabilitiesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinancialAssetsAndLiabilitiesLineItems", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of derivative financial instruments", "label": "Disclosure Of Financial Assets And Liabilities [Line Items]", "documentation": "Disclosure of financial assets and liabilities." } } }, "auth_ref": [] }, "bti_DisclosureOfFinancialAssetsAndLiabilitiesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinancialAssetsAndLiabilitiesTable", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Financial Assets And Liabilities [Table]", "label": "Disclosure Of Financial Assets And Liabilities [Table]", "documentation": "Disclosure of financial assets and liabilities." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFinancialAssetsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinancialAssetsLineItems", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of financial assets [line items]", "label": "Disclosure of financial assets [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFinancialAssetsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinancialAssetsTable", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of financial assets [table]", "label": "Disclosure of financial assets [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to financial assets." } } }, "auth_ref": [ "r321" ] }, "bti_DisclosureOfFinancialInformationOfSubsidiariesSubjectToSignificantRestrictionsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFinancialInformationOfSubsidiariesSubjectToSignificantRestrictionsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Financial Information of Subsidiaries Subject to Significant Restrictions", "label": "Disclosure Of Financial Information Of Subsidiaries Subject To Significant Restrictions Explanatory [Table Text Block]", "documentation": "Disclosure of financial information of subsidiaries subject to significant restrictions explanatory." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfFinancialInstrumentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinancialInstrumentsExplanatory", "presentation": [ "http://www.bat.com/role/DerivativefinancialinstrumentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of derivatives", "label": "Disclosure of financial instruments [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for financial instruments." } } }, "auth_ref": [ "r328" ] }, "ifrs-full_DisclosureOfFinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsExplanatory", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Supplier Financing Arrangements", "label": "Disclosure of financial liabilities that are part of supplier finance arrangements [text block]" } }, "en": { "role": { "documentation": "The disclosure of carrying amounts, and the associated line items presented in the entity\u2019s statement of financial position of financial liabilities that are part of a supplier finance arrangement." } } }, "auth_ref": [ "r195", "r196" ] }, "ifrs-full_DisclosureOfFinancialRiskManagementExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfFinancialRiskManagementExplanatory", "presentation": [ "http://www.bat.com/role/Financialinstrumentsandriskmanagement" ], "lang": { "en-us": { "role": { "terseLabel": "Financial instruments and risk management", "label": "Disclosure of financial risk management [text block]" } }, "en": { "role": { "documentation": "The disclosure of the entity's financial risk management practices and policies." } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfFutureMinimumPaymentUnderNonCancellableOperatingLeasesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfFutureMinimumPaymentUnderNonCancellableOperatingLeasesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Total Future Minimum Lease Payment under Non-cancellable Operating Leases", "label": "Disclosure Of Future Minimum Payment Under Non Cancellable Operating Leases Explanatory [Table Text Block]", "documentation": "The disclosure of future minimum payment under non-cancellable operating leases." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfGeographicalAreasAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfGeographicalAreasAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of geographical areas [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfGeographicalAreasLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfGeographicalAreasLineItems", "presentation": [ "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Geographical Areas [Line Items]", "verboseLabel": "Disclosure Of Geographical Information Of External Revenue Non Current Assets [Line Items]", "label": "Disclosure of geographical areas [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfGeographicalAreasTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfGeographicalAreasTable", "presentation": [ "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Geographical Areas [Table]", "label": "Disclosure of geographical areas [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to geographical areas." } } }, "auth_ref": [ "r343" ] }, "bti_DisclosureOfGeographicalInformationOfExternalRevenueAndNonCurrentAssetsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfGeographicalInformationOfExternalRevenueAndNonCurrentAssetsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SegmentalanalysesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Geographical Information of External Revenue", "label": "Disclosure Of Geographical Information Of External Revenue And Non Current Assets Explanatory [Table Text Block]", "documentation": "Disclosure of geographical information of external revenue and non-current assets." } } }, "auth_ref": [] }, "bti_DisclosureOfGeographicalInformationOfExternalRevenueNonCurrentAssetsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfGeographicalInformationOfExternalRevenueNonCurrentAssetsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Geographical Information Of External Revenue Non Current Assets [Abstract]", "documentation": "Disclosure of geographical information of external revenue non current assets." } } }, "auth_ref": [] }, "bti_DisclosureOfGeographicalInformationOfExternalRevenueNonCurrentAssetsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfGeographicalInformationOfExternalRevenueNonCurrentAssetsTable", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Geographical Information Of External Revenue Non Current Assets [Table]", "label": "Disclosure Of Geographical Information Of External Revenue Non Current Assets [Table]", "documentation": "Disclosure of geographical information of external revenue non current assets." } } }, "auth_ref": [] }, "bti_DisclosureOfGeographicalInformationOfNonCurrentAssetsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfGeographicalInformationOfNonCurrentAssetsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SegmentalanalysesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Geographical Information of Non-Current Assets", "label": "Disclosure Of Geographical Information Of Non Current Assets Explanatory [Table Text Block]", "documentation": "Disclosure of geographical information of non-current assets." } } }, "auth_ref": [] }, "bti_DisclosureOfHeadlineEarningsLossExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfHeadlineEarningsLossExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/EarningspershareTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Headline Earnings Per Share", "label": "Disclosure Of Headline Earnings Loss Explanatory [Table Text Block]", "documentation": "Headline Earnings Per Share." } } }, "auth_ref": [] }, "bti_DisclosureOfHeadlineEarningsLossLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfHeadlineEarningsLossLineItems", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Headline Earnings Loss [Line Items]", "label": "Disclosure Of Headline Earnings Loss [Line Items]", "documentation": "Disclosure of headline earnings loss." } } }, "auth_ref": [] }, "bti_DisclosureOfHeadlineEarningsLossTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfHeadlineEarningsLossTable", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Headline Earnings Loss [Table]", "label": "Disclosure Of Headline Earnings Loss [Table]", "documentation": "Disclosure of headline earnings loss." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Impairment Loss And Reversal Of Impairment Loss [Line Items]", "label": "Disclosure of impairment loss and reversal of impairment loss [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Impairment Loss And Reversal Of Impairment Loss [Table]", "label": "Disclosure of impairment loss and reversal of impairment loss [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to impairment loss and the reversal of impairment loss." } } }, "auth_ref": [ "r143" ] }, "ifrs-full_DisclosureOfIncomeTaxExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIncomeTaxExplanatory", "presentation": [ "http://www.bat.com/role/Taxationonordinaryactivities" ], "lang": { "en-us": { "role": { "terseLabel": "Taxation on ordinary activities", "label": "Disclosure of income tax [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for income taxes." } } }, "auth_ref": [ "r74" ] }, "ifrs-full_DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedShareOptionsGrantedDuringPeriodExplanatory", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Valuation Assumptions Used to Determine Fair Value of Share Options", "label": "Disclosure of indirect measurement of fair value of goods or services received, share options granted during period [text block]" } }, "en": { "role": { "documentation": "The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's share options." } } }, "auth_ref": [ "r271" ] }, "bti_DisclosureOfInformationAboutEmployeeBenefitCostsExplanatoryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInformationAboutEmployeeBenefitCostsExplanatoryTextBlock", "presentation": [ "http://www.bat.com/role/Employeebenefitcosts" ], "lang": { "en-us": { "role": { "terseLabel": "Employee benefit costs", "label": "Disclosure Of Information About Employee Benefit Costs Explanatory [Text Block]", "documentation": "Disclosure of information about employee benefit costs." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfInformationAboutEmployeesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInformationAboutEmployeesExplanatory", "presentation": [ "http://www.bat.com/role/Groupemployees" ], "lang": { "en-us": { "role": { "terseLabel": "Group employees", "label": "Disclosure of information about employees [text block]" } }, "en": { "role": { "documentation": "The disclosure of information about employees." } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesExplanatory", "presentation": [ "http://www.bat.com/role/IntangibleassetsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Cash Generating Unit", "label": "Disclosure of information for cash-generating units [text block]" } }, "en": { "role": { "documentation": "The disclosure of information for cash-generating units. [Refer: Total for all cash-generating units [member]]" } } }, "auth_ref": [ "r154" ] }, "ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesLineItems", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of information for cash-generating units [line items]", "label": "Disclosure of information for cash-generating units [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInformationForIndividualAssetOrCashgeneratingUnitWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesTable", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of information for cash-generating units [table]", "label": "Disclosure of information for cash-generating units [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to cash-generating units." } } }, "auth_ref": [ "r154" ] }, "ifrs-full_DisclosureOfIntangibleAssetsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsAbstract", "lang": { "en-us": { "role": { "terseLabel": "Disclosure of detailed information about intangible assets [abstract]", "label": "Disclosure of detailed information about intangible assets [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfIntangibleAssetsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsExplanatory", "presentation": [ "http://www.bat.com/role/Intangibleassets" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets", "label": "Disclosure of intangible assets [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for intangible assets." } } }, "auth_ref": [ "r176" ] }, "ifrs-full_DisclosureOfIntangibleAssetsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsLineItems", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Intangible Assets [Line Items]", "label": "Disclosure of detailed information about intangible assets [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfIntangibleAssetsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsTable", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Intangible Assets [Table]", "label": "Disclosure of detailed information about intangible assets [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to details of intangible assets." } } }, "auth_ref": [ "r172" ] }, "bti_DisclosureOfIntangibleAssetsWithDefiniteUsefulLifeTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfIntangibleAssetsWithDefiniteUsefulLifeTableTextBlock", "presentation": [ "http://www.bat.com/role/IntangibleassetsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of intangible assets with definite useful life", "label": "Disclosure Of Intangible Assets With Definite Useful Life [Table Text Block]", "documentation": "Disclosure Of Intangible Assets With Definite Useful Life" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeExplanatory", "presentation": [ "http://www.bat.com/role/IntangibleassetsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of impairment of intangible assets with indefinite useful life", "label": "Disclosure of intangible assets with indefinite useful life [text block]" } }, "en": { "role": { "documentation": "The disclosure of intangible assets with an indefinite useful life. [Refer: Intangible assets with indefinite useful life]" } } }, "auth_ref": [ "r173" ] }, "ifrs-full_DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeLineItems", "presentation": [ "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of intangible assets with indefinite useful life [line items]", "label": "Disclosure of intangible assets with indefinite useful life [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfIntangibleAssetsWithIndefiniteUsefulLifeTable", "presentation": [ "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of intangible assets with indefinite useful life [table]", "label": "Disclosure of intangible assets with indefinite useful life [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to intangible assets with an indefinite useful life." } } }, "auth_ref": [ "r173" ] }, "ifrs-full_DisclosureOfInterestIncomeExpenseExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInterestIncomeExpenseExplanatory", "presentation": [ "http://www.bat.com/role/NetfinancecostsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Net Finance Costs/(Income)", "label": "Disclosure of interest income (expense) [text block]" } }, "en": { "role": { "documentation": "The disclosure of interest income and expense. [Refer: Interest income (expense)]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfInterestsInSubsidiariesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInterestsInSubsidiariesExplanatory", "presentation": [ "http://www.bat.com/role/Interestsinsubsidiaries" ], "lang": { "en-us": { "role": { "terseLabel": "Interests in subsidiaries", "label": "Disclosure of interests in subsidiaries [text block]" } }, "en": { "role": { "documentation": "The disclosure of interests in subsidiaries. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r210" ] }, "ifrs-full_DisclosureOfInventoriesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInventoriesExplanatory", "presentation": [ "http://www.bat.com/role/Inventories" ], "lang": { "en-us": { "role": { "terseLabel": "Inventories", "label": "Disclosure of inventories [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for inventories." } } }, "auth_ref": [ "r109" ] }, "bti_DisclosureOfInvestmentInAssociateExplanatoryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInvestmentInAssociateExplanatoryTextBlock", "presentation": [ "http://www.bat.com/role/Investmentsinassociatesandjointventures" ], "lang": { "en-us": { "role": { "terseLabel": "Investments in associates and joint ventures", "label": "Disclosure Of Investment In Associate Explanatory [Text Block]", "documentation": "The entire disclosure for investment in associate." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory", "presentation": [ "http://www.bat.com/role/Associatesandjointventures" ], "lang": { "en-us": { "role": { "terseLabel": "Associates and joint ventures", "label": "Disclosure of investments accounted for using equity method [text block]" } }, "en": { "role": { "documentation": "The disclosure of investments accounted for using the equity method. [Refer: Investments accounted for using equity method]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfInvestmentsHeldAtFairValueAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInvestmentsHeldAtFairValueAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Investments Held At Fair Value [Abstract]", "documentation": "Disclosure of investments held at fair value." } } }, "auth_ref": [] }, "bti_DisclosureOfInvestmentsHeldAtFairValueExplanatoryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInvestmentsHeldAtFairValueExplanatoryTextBlock", "presentation": [ "http://www.bat.com/role/Investmentsheldatfairvalue" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "label": "Disclosure Of Investments Held At Fair Value Explanatory [Text Block]", "documentation": "Disclosure of investments held at fair value." } } }, "auth_ref": [] }, "bti_DisclosureOfInvestmentsHeldAtFairValueTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInvestmentsHeldAtFairValueTableTextBlock", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueTables" ], "lang": { "en-us": { "role": { "terseLabel": "Investments Held at Fair Value", "label": "Disclosure Of Investments Held At Fair Value [Table Text Block]", "documentation": "Disclosure Of Investments Held At Fair Value." } } }, "auth_ref": [] }, "bti_DisclosureOfInvestmentsInAssociatesAndJointVenturesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfInvestmentsInAssociatesAndJointVenturesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InvestmentsinassociatesandjointventuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Investments In Associates And Joint Ventures", "label": "Disclosure Of Investments In Associates And Joint Ventures Explanatory [Table Text Block]", "documentation": "The disclosure of investments in associates and joint ventures." } } }, "auth_ref": [] }, "bti_DisclosureOfJointVenturesAndAssociatesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfJointVenturesAndAssociatesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Joint Ventures And Associates [Abstract]", "documentation": "Disclosure of joint ventures and associates." } } }, "auth_ref": [] }, "bti_DisclosureOfLifeExpectancyLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfLifeExpectancyLineItems", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Life Expectancy [Line Items]", "label": "Disclosure Of Life Expectancy [Line Items]", "documentation": "Disclosure of life expectancy." } } }, "auth_ref": [] }, "bti_DisclosureOfLifeExpectancyTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfLifeExpectancyTable", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Life Expectancy [Table]", "label": "Disclosure Of Life Expectancy [Table]", "documentation": "Disclosure of life expectancy." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfMaterialAccountingPolicyInformationExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfMaterialAccountingPolicyInformationExplanatory", "presentation": [ "http://www.bat.com/role/Accountingpolicies" ], "lang": { "en-us": { "role": { "terseLabel": "Accounting policies", "label": "Disclosure of material accounting policy information [text block]" } }, "en": { "role": { "documentation": "The entire disclosure of material accounting policy information applied by the entity." } } }, "auth_ref": [ "r9" ] }, "bti_DisclosureOfMovementInAllowanceForTradeAndOtherReceivablesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfMovementInAllowanceForTradeAndOtherReceivablesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of movements in allowance account", "label": "Disclosure Of Movement In Allowance For Trade And Other Receivables Explanatory [Table Text Block]", "documentation": "Disclosure Of Movement In Allowance For Trade And Other Receivables Explanatory" } } }, "auth_ref": [] }, "bti_DisclosureOfMovementsInUnrecognisedSchemeSurplusesRecognisedInOtherComprehensiveIncomeExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfMovementsInUnrecognisedSchemeSurplusesRecognisedInOtherComprehensiveIncomeExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure - Retirement Benefit Schemes - Summary of Movements in the Unrecognised Scheme Surpluses Recognised in Other Comprehensive Income", "label": "Disclosure Of Movements In Unrecognised Scheme Surpluses Recognised In Other Comprehensive Income Explanatory [Table Text Block]", "documentation": "Disclosure of movements in unrecognised scheme surpluses recognised in other comprehensive income." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfNetDefinedBenefitLiabilityAssetAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of net defined benefit liability (asset) [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Defined Benefit Amounts Recognised in Balance Sheets", "label": "Disclosure of net defined benefit liability (asset) [text block]" } }, "en": { "role": { "documentation": "The disclosure of a net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r88" ] }, "ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfNetDefinedBenefitLiabilityAssetLineItems", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Net Defined Benefit Liability Asset [Line Items]", "label": "Disclosure of net defined benefit liability (asset) [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfNetDefinedBenefitLiabilityAssetTable", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Net Defined Benefit Liability Asset [Table]", "label": "Disclosure of net defined benefit liability (asset) [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the net defined benefit liability (asset)." } } }, "auth_ref": [ "r88" ] }, "bti_DisclosureOfNetDetailsOfCashAndCashEquivalentsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfNetDetailsOfCashAndCashEquivalentsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/CashandcashequivalentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Net Cash and Cash Equivalents Shown After Deducting Bank Overdrafts and Accrued Interest", "label": "Disclosure Of Net Details Of Cash And Cash Equivalents Explanatory [Table Text Block]", "documentation": "Disclosure of net details of cash and cash equivalents." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfOperatingSegmentsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOperatingSegmentsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of operating segments [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfOperatingSegmentsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOperatingSegmentsExplanatory", "presentation": [ "http://www.bat.com/role/SegmentalanalysesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Operating Segment Information", "label": "Disclosure of operating segments [text block]" } }, "en": { "role": { "documentation": "The disclosure of operating segments. [Refer: Operating segments [member]]" } } }, "auth_ref": [ "r333" ] }, "ifrs-full_DisclosureOfOperatingSegmentsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOperatingSegmentsLineItems", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Operating Segments [Line Items]", "label": "Disclosure of operating segments [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfOperatingSegmentsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOperatingSegmentsTable", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Operating Segments [Table]", "label": "Disclosure of operating segments [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to operating segments." } } }, "auth_ref": [ "r333" ] }, "ifrs-full_DisclosureOfOtherOperatingExpenseExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOtherOperatingExpenseExplanatory", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Other Operating Expenses", "label": "Disclosure of other operating expense [text block]" } }, "en": { "role": { "documentation": "The disclosure of other operating expense. [Refer: Other operating income (expense)]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfOtherOperatingIncomeExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOtherOperatingIncomeExplanatory", "presentation": [ "http://www.bat.com/role/Otheroperatingincome" ], "lang": { "en-us": { "role": { "terseLabel": "Other operating income", "label": "Disclosure of other operating income [text block]" } }, "en": { "role": { "documentation": "The disclosure of other operating income. [Refer: Other operating income (expense)]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfOtherProvisionsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOtherProvisionsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of other provisions [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfOtherProvisionsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOtherProvisionsLineItems", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Other Provisions [Line Items]", "label": "Disclosure of other provisions [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfOtherProvisionsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfOtherProvisionsTable", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Other Provisions [Table]", "label": "Disclosure of other provisions [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to other provisions." } } }, "auth_ref": [ "r162" ] }, "ifrs-full_DisclosureOfProductsAndServicesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProductsAndServicesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of products and services [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfProductsAndServicesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProductsAndServicesExplanatory", "presentation": [ "http://www.bat.com/role/SegmentalanalysesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Additional Information by Product Category", "label": "Disclosure of products and services [text block]" } }, "en": { "role": { "documentation": "The disclosure of the entity's products and services. [Refer: Products and services [domain]]" } } }, "auth_ref": [ "r340" ] }, "ifrs-full_DisclosureOfProductsAndServicesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProductsAndServicesLineItems", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Products And Services [Line Items]", "label": "Disclosure of products and services [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfProductsAndServicesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProductsAndServicesTable", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Products And Services [Table]", "label": "Disclosure of products and services [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the entity's products and services." } } }, "auth_ref": [ "r340" ] }, "ifrs-full_DisclosureOfProfitLossFromOperatingActivitiesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProfitLossFromOperatingActivitiesExplanatory", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Cost of Initiatives in Profit from Operations", "label": "Disclosure of profit (loss) from operating activities [text block]" } }, "en": { "role": { "documentation": "The disclosure of profit (loss) from operating activities. [Refer: Profit (loss) from operating activities]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/AssociatesandjointventuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Profit (Loss) of Associates and Joint Ventures Accounted for Using Equity Method", "label": "Disclosure Of Profit Loss Of Associates And Joint Ventures Accounted For Using Equity Method Explanatory [Table Text Block]", "documentation": "Disclosure of profit loss of associates and joint ventures accounted for using equity method." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfPropertyPlantAndEquipmentAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfPropertyPlantAndEquipmentAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of detailed information about property, plant and equipment [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfPropertyPlantAndEquipmentExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfPropertyPlantAndEquipmentExplanatory", "presentation": [ "http://www.bat.com/role/Propertyplantandequipment" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment", "label": "Disclosure of property, plant and equipment [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for property, plant and equipment." } } }, "auth_ref": [ "r84" ] }, "ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfPropertyPlantAndEquipmentLineItems", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of detailed information about property, plant and equipment [line items]", "label": "Disclosure of detailed information about property, plant and equipment [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfPropertyPlantAndEquipmentTable", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of detailed information about property, plant and equipment [table]", "label": "Disclosure of detailed information about property, plant and equipment [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to details of property, plant and equipment." } } }, "auth_ref": [ "r82" ] }, "bti_DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfProvisionsExcludingPostRetirementBenefitsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Provisions Excluding Post-Retirement Benefits", "label": "Disclosure Of Provisions Excluding Post Retirement Benefits Explanatory [Table Text Block]", "documentation": "The disclosure of provisions excluding post retirement benefits." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfProvisionsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfProvisionsExplanatory", "presentation": [ "http://www.bat.com/role/Provisionsforliabilities" ], "lang": { "en-us": { "role": { "terseLabel": "Provisions for liabilities", "label": "Disclosure of provisions [text block]" } }, "en": { "role": { "documentation": "The disclosure of provisions. [Refer: Provisions]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfRangeOfPaymentDueDatesOfFinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfRangeOfPaymentDueDatesOfFinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsExplanatory", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Trade Payables, Payment Terms", "label": "Disclosure of range of payment due dates of financial liabilities that are part of supplier finance arrangements [text block]" } }, "en": { "role": { "documentation": "The disclosure of the range of payment due dates of financial liabilities that are part of a supplier finance arrangement." } } }, "auth_ref": [ "r197" ] }, "ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillExplanatory", "presentation": [ "http://www.bat.com/role/IntangibleassetsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Movement in Intangible Assets", "label": "Disclosure of reconciliation of changes in intangible assets and goodwill [text block]" } }, "en": { "role": { "documentation": "The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill]" } } }, "auth_ref": [ "r614" ] }, "ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems", "presentation": [ "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of reconciliation of changes in intangible assets and goodwill [line items]", "label": "Disclosure of reconciliation of changes in intangible assets and goodwill [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable", "presentation": [ "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of reconciliation of changes in intangible assets and goodwill [table]", "label": "Disclosure of reconciliation of changes in intangible assets and goodwill [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the reconciliation of changes in intangible assets and goodwill." } } }, "auth_ref": [ "r614" ] }, "bti_DisclosureOfReconciliationOfEffectiveTaxRateExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfReconciliationOfEffectiveTaxRateExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TaxationonordinaryactivitiesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Factors Affecting Taxation Charge", "label": "Disclosure Of Reconciliation Of Effective Tax Rate Explanatory [Table Text Block]", "documentation": "Disclosure of reconciliation of effective tax rate." } } }, "auth_ref": [] }, "bti_DisclosureOfReconciliationOfFairValueInvestmentsCashFlowsToCashFlowStatementExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfReconciliationOfFairValueInvestmentsCashFlowsToCashFlowStatementExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueTables" ], "lang": { "en-us": { "role": { "terseLabel": "Schedule of Reconciliation of Fair Value Investments Cash Flows to Cash Flow Statements", "label": "Disclosure Of Reconciliation Of Fair Value Investments Cash Flows To Cash Flow Statement Explanatory [Table Text Block]", "documentation": "The disclosure of detailed information about reconciliation of the fair value investments cash flows to the cash flow statement." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of reconciliation of liabilities arising from financing activities [abstract]" } } }, "auth_ref": [] }, "bti_DisclosureOfReconciliationOfNetDeferredTaxAssetLiabilityExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfReconciliationOfNetDeferredTaxAssetLiabilityExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/DeferredtaxTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Reconciliation of Net Deferred Tax Assets/(Liabilities)", "label": "Disclosure Of Reconciliation Of Net Deferred Tax Asset Liability Explanatory [Table Text Block]", "documentation": "Disclosure Of Reconciliation Of Net Deferred Tax Asset Liability Explanatory" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfRelatedPartyExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfRelatedPartyExplanatory", "presentation": [ "http://www.bat.com/role/Relatedpartydisclosures" ], "lang": { "en-us": { "role": { "terseLabel": "Related party disclosures", "label": "Disclosure of related party [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for related parties." } } }, "auth_ref": [ "r125" ] }, "ifrs-full_DisclosureOfReservesAndOtherEquityInterestExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReservesAndOtherEquityInterestExplanatory", "presentation": [ "http://www.bat.com/role/CapitalandreservesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Movements in Other Reserves and Retained Earnings", "label": "Disclosure of reserves within equity [text block]" } }, "en": { "role": { "documentation": "The disclosure of reserves within equity. [Refer: Other reserves [member]]" } } }, "auth_ref": [ "r37" ] }, "ifrs-full_DisclosureOfReservesWithinEquityLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReservesWithinEquityLineItems", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of reserves within equity [line items]", "label": "Disclosure of reserves within equity [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfReservesWithinEquityTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfReservesWithinEquityTable", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of reserves within equity [table]", "label": "Disclosure of reserves within equity [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to reserves within equity." } } }, "auth_ref": [ "r37" ] }, "bti_DisclosureOfRestructuringAndIntegrationCostsExplanatoryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfRestructuringAndIntegrationCostsExplanatoryTextBlock", "presentation": [ "http://www.bat.com/role/Restructuringandintegrationcosts" ], "lang": { "en-us": { "role": { "terseLabel": "Restructuring and integration costs", "label": "Disclosure Of Restructuring And Integration Costs Explanatory [Text Block]", "documentation": "The entire disclosure for restructuring and integration costs." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSensitivityAnalysisForActuarialAssumptionsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of sensitivity analysis for actuarial assumptions [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure - Retirement Benefit Schemes - Summary of Actuarial Assumptions Rate for Valuations Plans", "label": "Disclosure of sensitivity analysis for actuarial assumptions [text block]" } }, "en": { "role": { "documentation": "The disclosure of a sensitivity analysis for significant actuarial assumptions used to determine the present value of a defined benefit obligation. [Refer: Actuarial assumptions [domain]; Defined benefit obligation, at present value]" } } }, "auth_ref": [ "r99" ] }, "ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items]", "label": "Disclosure of sensitivity analysis for actuarial assumptions [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Table]", "label": "Disclosure of sensitivity analysis for actuarial assumptions [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to the sensitivity analysis for actuarial assumptions." } } }, "auth_ref": [ "r99" ] }, "ifrs-full_DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory", "presentation": [ "http://www.bat.com/role/Capitalandreserves" ], "lang": { "en-us": { "role": { "terseLabel": "Capital and reserves", "label": "Disclosure of share capital, reserves and other equity interest [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for share capital, reserves and other equity interest." } } }, "auth_ref": [ "r38" ] }, "bti_DisclosureOfShareCapitalReservesAndOtherEquityInterestLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfShareCapitalReservesAndOtherEquityInterestLineItems", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Share Capital Reserves And Other Equity Interest [Line Items]", "label": "Disclosure Of Share Capital Reserves And Other Equity Interest [Line Items]", "documentation": "Disclosure of share capital reserves and other equity interest." } } }, "auth_ref": [] }, "bti_DisclosureOfShareCapitalReservesAndOtherEquityInterestTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfShareCapitalReservesAndOtherEquityInterestTable", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Share Capital Reserves And Other Equity Interest [Table]", "label": "Disclosure Of Share Capital Reserves And Other Equity Interest [Table]", "documentation": "Disclosure of share capital reserves and other equity interest." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSharebasedPaymentArrangementsExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSharebasedPaymentArrangementsExplanatory", "presentation": [ "http://www.bat.com/role/Sharebasedpayments" ], "lang": { "en-us": { "role": { "terseLabel": "Share-based payments", "label": "Disclosure of share-based payment arrangements [text block]" } }, "en": { "role": { "documentation": "The entire disclosure for share-based payment arrangements." } } }, "auth_ref": [ "r261" ] }, "bti_DisclosureOfSharebasedPaymentAssumptionsUsedInModelsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSharebasedPaymentAssumptionsUsedInModelsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Valuation Assumptions Used in Monte-Carlo Models", "label": "Disclosure Of Sharebased Payment Assumptions Used In Models Explanatory [Table Text Block]", "documentation": "Disclosure of share-based payment assumptions used in models." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInAssociatesAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Associates", "label": "Disclosure of associates [abstract]" } } }, "auth_ref": [] }, "bti_DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesLineItems", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items]", "label": "Disclosure Of Significant Investments In Associates And Joint Ventures [Line Items]", "documentation": "Disclosure of significant investments in associates and joint ventures." } } }, "auth_ref": [] }, "bti_DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSignificantInvestmentsInAssociatesAndJointVenturesTable", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Significant Investments In Associates And Joint Ventures [Table]", "label": "Disclosure Of Significant Investments In Associates And Joint Ventures [Table]", "documentation": "Disclosure of significant investments in associates and joint ventures." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInAssociatesExplanatory", "presentation": [ "http://www.bat.com/role/InvestmentsinassociatesandjointventuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Latest Published Information", "label": "Disclosure of associates [text block]" } }, "en": { "role": { "documentation": "The disclosure of associates. [Refer: Total for all associates [member]]" } } }, "auth_ref": [ "r131", "r133", "r228" ] }, "ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInAssociatesLineItems", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of associates [line items]", "label": "Disclosure of associates [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInAssociatesTable", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of associates [table]", "label": "Disclosure of associates [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to associates." } } }, "auth_ref": [ "r131", "r133", "r228" ] }, "ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInSubsidiariesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of subsidiaries [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInSubsidiariesLineItems", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Significant Investments in Subsidiaries [Line Items]", "label": "Disclosure of subsidiaries [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfSignificantInvestmentsInSubsidiariesTable", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Significant Investments In Subsidiaries [Table]", "label": "Disclosure of subsidiaries [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to subsidiaries." } } }, "auth_ref": [ "r131", "r133", "r227" ] }, "bti_DisclosureOfSummarisedFinancialInformationAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummarisedFinancialInformationAbstract", "lang": { "en-us": { "role": { "label": "Disclosure Of Summarised Financial Information [Abstract]", "documentation": "Disclosure of summarised financial information." } } }, "auth_ref": [] }, "bti_DisclosureOfSummarisedFinancialInformationLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummarisedFinancialInformationLineItems", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Summarised Financial Information [Line Items]", "label": "Disclosure Of Summarised Financial Information [Line Items]", "documentation": "Disclosure of summarised financial information." } } }, "auth_ref": [] }, "bti_DisclosureOfSummarisedFinancialInformationOfAssociatesAndJointVenturesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummarisedFinancialInformationOfAssociatesAndJointVenturesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/AssociatesandjointventuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Financial Information of the Group's Associates and Joint Ventures", "label": "Disclosure Of Summarised Financial Information Of Associates And Joint Ventures Explanatory [Table Text Block]", "documentation": "Disclosure of summarised financial information of associates and joint ventures." } } }, "auth_ref": [] }, "bti_DisclosureOfSummarisedFinancialInformationTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummarisedFinancialInformationTable", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Summarised Financial Information [Table]", "label": "Disclosure Of Summarised Financial Information [Table]", "documentation": "Disclosure of summarised financial information." } } }, "auth_ref": [] }, "bti_DisclosureOfSummaryOfShareOfGroupInResultsOfAssociatesAndJointVenturesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummaryOfShareOfGroupInResultsOfAssociatesAndJointVenturesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/AssociatesandjointventuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Group's Share of the Result of Associates and Joint Ventures", "label": "Disclosure Of Summary Of Share Of Group In Results Of Associates And Joint Ventures Explanatory [Table Text Block]", "documentation": "The detailed disclosure of summary of the group's share in the results of associates and joint ventures." } } }, "auth_ref": [] }, "bti_DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSummaryOfTradeAndOtherReceivablesExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of trade and other receivables", "label": "Disclosure Of Summary Of Trade And Other Receivables Explanatory [Table Text Block]", "documentation": "Disclosure Of Summary Of Trade And Other Receivables Explanatory" } } }, "auth_ref": [] }, "bti_DisclosureOfSustainabilityCostsTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfSustainabilityCostsTableTextBlock", "presentation": [ "http://www.bat.com/role/SustainabilitycostsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Sustainability Costs", "label": "Disclosure of Sustainability Costs [Table Text Block]", "documentation": "Disclosure of Sustainability Costs" } } }, "auth_ref": [] }, "bti_DisclosureOfTaxChargeCreditRelatingToComponentsOfOtherComprehensiveIncomeExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfTaxChargeCreditRelatingToComponentsOfOtherComprehensiveIncomeExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TaxationonordinaryactivitiesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Tax on Items Recognised Directly in Other Comprehensive Income", "label": "Disclosure Of Tax Charge Credit Relating To Components Of Other Comprehensive Income Explanatory [Table Text Block]", "documentation": "Disclosure of tax charge credit relating to components of other comprehensive income." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of temporary difference, unused tax losses and unused tax credits [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of Temporary Difference Unused Tax Losses and Unused Tax Credits", "label": "Disclosure of temporary difference, unused tax losses and unused tax credits [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Table]", "label": "Disclosure of temporary difference, unused tax losses and unused tax credits [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to temporary differences, unused tax losses and unused tax credits." } } }, "auth_ref": [ "r71" ] }, "ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of terms and conditions of share-based payment arrangement [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]", "label": "Disclosure of terms and conditions of share-based payment arrangement [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Table]", "label": "Disclosure of terms and conditions of share-based payment arrangement [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to terms and conditions of share-based payment arrangements." } } }, "auth_ref": [ "r269" ] }, "ifrs-full_DisclosureOfTradeAndOtherPayablesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTradeAndOtherPayablesExplanatory", "presentation": [ "http://www.bat.com/role/Tradeandotherpayables" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other payables", "label": "Disclosure of trade and other payables [text block]" } }, "en": { "role": { "documentation": "The disclosure of trade and other payables. [Refer: Trade and other payables]" } } }, "auth_ref": [ "r574" ] }, "ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTradeAndOtherReceivablesExplanatory", "presentation": [ "http://www.bat.com/role/Tradeandotherreceivables" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other receivables", "label": "Disclosure of trade and other receivables [text block]" } }, "en": { "role": { "documentation": "The disclosure of trade and other receivables. [Refer: Trade and other receivables]" } } }, "auth_ref": [ "r574" ] }, "bti_DisclosureOfTradeAndOtherReceivablesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfTradeAndOtherReceivablesLineItems", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Trade And Other Receivables [Line Items]", "label": "Disclosure Of Trade And Other Receivables [Line Items]", "documentation": "Disclosure Of Trade And Other Receivables [Line Items]" } } }, "auth_ref": [] }, "bti_DisclosureOfTradeAndOtherReceivablesReportedInBalanceSheetNetOfAllowanceExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfTradeAndOtherReceivablesReportedInBalanceSheetNetOfAllowanceExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of trade and other receivables reported in balance sheet net of allowances", "label": "Disclosure Of Trade And Other Receivables Reported In Balance Sheet Net Of Allowance Explanatory [Table Text Block]", "documentation": "Disclosure Of Trade And Other Receivables Reported In Balance Sheet Net Of Allowance Explanatory" } } }, "auth_ref": [] }, "bti_DisclosureOfTradeAndOtherReceivablesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfTradeAndOtherReceivablesTable", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure Of Trade And Other Receivables [Table]", "label": "Disclosure Of Trade And Other Receivables [Table]", "documentation": "Disclosure Of Trade And Other Receivables [Table]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTransactionsBetweenRelatedPartiesAbstract", "lang": { "en-us": { "role": { "label": "Disclosure of transactions between related parties [abstract]" } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTransactionsBetweenRelatedPartiesExplanatory", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Transactions Between Related Parties", "label": "Disclosure of transactions between related parties [text block]" } }, "en": { "role": { "documentation": "The disclosure of transactions between the entity and its related parties. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r119" ] }, "ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTransactionsBetweenRelatedPartiesLineItems", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of transactions between related parties [line items]", "label": "Disclosure of transactions between related parties [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisclosureOfTransactionsBetweenRelatedPartiesTable", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disclosure of transactions between related parties [table]", "label": "Disclosure of transactions between related parties [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to transactions between related parties." } } }, "auth_ref": [ "r123" ] }, "bti_DisclosureOfUnconsolidatedContributionToConsolidatedEquityResultsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisclosureOfUnconsolidatedContributionToConsolidatedEquityResultsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Unconsolidated Equity Results", "label": "Disclosure Of Unconsolidated Contribution To Consolidated Equity Results Explanatory [Table Text Block]", "documentation": "Disclosure of unconsolidated contribution to consolidated equity results." } } }, "auth_ref": [] }, "ifrs-full_DiscontinuedOperationsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DiscontinuedOperationsMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Discontinued operations", "label": "Discontinued operations [member]" } }, "en": { "role": { "documentation": "This member stands for a component of an entity that either has been disposed of or is classified as held for sale, and that: (a) represents a separate major line of business or geographical area of operations; (b) is part of a single co-ordinated plan to dispose of a separate major line of business or geographical area of operations; or (c) is a subsidiary acquired exclusively with a view to resale. A component of an entity comprises operations and cash flows that can be clearly distinguished, operationally and for financial reporting purposes, from the rest of the entity. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r287" ] }, "bti_DiscountPercentageOnMarketPricePercentage": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DiscountPercentageOnMarketPricePercentage", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Discount percentage on market price", "label": "Discount Percentage On Market Price Percentage", "documentation": "Discount percentage on market price percentage." } } }, "auth_ref": [] }, "ifrs-full_DiscountedCashFlowMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DiscountedCashFlowMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Discounted Cash Flow", "label": "Discounted cash flow [member]" } }, "en": { "role": { "documentation": "This member stands for a specific valuation technique consistent with the income approach that involves analysing future cash flow amounts through the application of present value techniques and inputs (for example, weighted average cost of capital, long-term revenue growth rate, long-term pre-tax operating margin, discount for lack of marketability, control premium). [Refer: Income approach [member]; Weighted average [member]]" } } }, "auth_ref": [ "r428", "r433" ] }, "bti_DisposalGroupDiscountedConsiderationReceivable": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisposalGroupDiscountedConsiderationReceivable", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Disposal group discounted consideration receivable", "label": "Disposal Group Discounted Consideration Receivable", "documentation": "Disposal group discontinued operation discounted consideration receivable." } } }, "auth_ref": [] }, "bti_DisposalGroupTransactionCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisposalGroupTransactionCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associated costs", "label": "Disposal Group, Transaction Costs", "documentation": "Disposal Group, Transaction Costs" } } }, "auth_ref": [] }, "bti_DisposalsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DisposalsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Disposals", "terseLabel": "Disposals", "label": "Disposals Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Disposals of investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "ifrs-full_DisposalsPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DisposalsPropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "credit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Disposals", "label": "Disposals, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The decrease in property, plant and equipment including right-of-use assets resulting from disposals. [Refer: Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "bti_DividendPayablePerOrdinaryShare": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DividendPayablePerOrdinaryShare", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend payable per ordinary share", "label": "Dividend Payable Per Ordinary Share", "documentation": "Dividend payable per ordinary share." } } }, "auth_ref": [] }, "ifrs-full_DividendPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendPayables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend payables", "label": "Dividend payables" } }, "en": { "role": { "documentation": "The amount of dividends that the company has declared but not yet paid." } } }, "auth_ref": [ "r581" ] }, "bti_DividendsAndOtherAppropriationsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DividendsAndOtherAppropriationsAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Dividends and other appropriations", "label": "Dividends And Other Appropriations [Abstract]", "documentation": "Dividends And Other Appropriations" } } }, "auth_ref": [] }, "ifrs-full_DividendsPaid": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsPaid", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend paid by Windward to Sequana", "label": "Dividends recognised as distributions to owners" } }, "en": { "role": { "documentation": "The amount of dividends recognised as distributions to owners." } } }, "auth_ref": [ "r8" ] }, "ifrs-full_DividendsPaidClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsPaidClassifiedAsFinancingActivities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend payable", "label": "Dividends paid, classified as financing activities" } }, "en": { "role": { "documentation": "The cash outflow for dividends paid by the entity, classified as financing activities." } } }, "auth_ref": [ "r192" ] }, "ifrs-full_DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsPaidToEquityHoldersOfParentClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 3.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Dividends paid to owners of the parent", "label": "Dividends paid to equity holders of parent, classified as financing activities" } }, "en": { "role": { "documentation": "The cash outflow for dividends paid to equity holders of the parent, classified as financing activities." } } }, "auth_ref": [ "r618" ] }, "ifrs-full_DividendsPaidToNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsPaidToNoncontrollingInterests", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Dividends paid and other appropriations made to non-controlling interests", "label": "Dividends paid to non-controlling interests" } }, "en": { "role": { "documentation": "The amount of dividends paid to non-controlling interests. [Refer: Non-controlling interests]" } } }, "auth_ref": [ "r214" ] }, "ifrs-full_DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsPaidToNoncontrollingInterestsClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 4.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Dividends paid to non-controlling interests", "negatedLabel": "Dividends paid to non-controlling interests", "label": "Dividends paid to non-controlling interests, classified as financing activities" } }, "en": { "role": { "documentation": "The cash outflow for dividends paid to non-controlling interests, classified as financing activities. [Refer: Non-controlling interests; Dividends paid to non-controlling interests]" } } }, "auth_ref": [ "r618" ] }, "bti_DividendsPayableNumberOfInstallments": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DividendsPayableNumberOfInstallments", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividends payable number of installments", "label": "Dividends Payable Number Of Installments", "documentation": "Dividends payable number of installments." } } }, "auth_ref": [] }, "ifrs-full_DividendsReceived": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsReceived", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Dividends", "terseLabel": "Dividends paid by the associate", "label": "Dividends received" } }, "en": { "role": { "documentation": "The amount of dividends received." } } }, "auth_ref": [ "r215" ] }, "ifrs-full_DividendsReceivedClassifiedAsOperatingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsReceivedClassifiedAsOperatingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperatingActivities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Dividends received from associates", "label": "Dividends received, classified as operating activities" } }, "en": { "role": { "documentation": "The cash inflow from dividends received, classified as operating activities. [Refer: Dividends received]" } } }, "auth_ref": [ "r192" ] }, "ifrs-full_DividendsRecognisedAsDistributionsToNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsRecognisedAsDistributionsToNoncontrollingInterests", "crdr": "debit", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "to non-controlling interests", "label": "Dividends recognised as distributions to non-controlling interests" } }, "en": { "role": { "documentation": "The amount of dividends recognised as distributions to non-controlling interests. [Refer: Non-controlling interests]" } } }, "auth_ref": [ "r576" ] }, "ifrs-full_DividendsRecognisedAsDistributionsToOwnersOfParent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsRecognisedAsDistributionsToOwnersOfParent", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "ordinary shares", "terseLabel": "Dividends recognised as distributions to owners of parent", "negatedLabel": "\u2013 ordinary shares", "label": "Dividends recognised as distributions to owners of parent" } }, "en": { "role": { "documentation": "The amount of dividends recognised as distributions to owners of the parent. [Refer: Parent [member]]" } } }, "auth_ref": [ "r576" ] }, "ifrs-full_DividendsRecognisedAsDistributionsToOwnersPerShare": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "DividendsRecognisedAsDistributionsToOwnersPerShare", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interim quarterly Dividend declared per share", "label": "Dividends recognised as distributions to owners per share" } }, "en": { "role": { "documentation": "The amount, per share, of dividends recognised as distributions to owners." } } }, "auth_ref": [ "r8" ] }, "dei_DocumentAccountingStandard": { "xbrltype": "accountingStandardItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentAccountingStandard", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Accounting Standard", "label": "Document Accounting Standard", "documentation": "The basis of accounting the registrant has used to prepare the financial statements included in this filing This can either be 'U.S. GAAP', 'International Financial Reporting Standards', or 'Other'." } } }, "auth_ref": [ "r466" ] }, "dei_DocumentAnnualReport": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentAnnualReport", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Annual Report", "label": "Document Annual Report", "documentation": "Boolean flag that is true only for a form used as an annual report." } } }, "auth_ref": [ "r465", "r466", "r489" ] }, "dei_DocumentFinStmtErrorCorrectionFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentFinStmtErrorCorrectionFlag", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Financial Statement Error Correction", "label": "Document Financial Statement Error Correction [Flag]", "documentation": "Indicates whether any of the financial statement period in the filing include a restatement due to error correction." } } }, "auth_ref": [ "r465", "r466", "r489", "r532" ] }, "dei_DocumentFiscalPeriodFocus": { "xbrltype": "fiscalPeriodItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentFiscalPeriodFocus", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Fiscal Period Focus", "label": "Document Fiscal Period Focus", "documentation": "Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY." } } }, "auth_ref": [] }, "dei_DocumentFiscalYearFocus": { "xbrltype": "gYearItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentFiscalYearFocus", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Fiscal Year Focus", "label": "Document Fiscal Year Focus", "documentation": "This is focus fiscal year of the document report in YYYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006." } } }, "auth_ref": [] }, "dei_DocumentInformationLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentInformationLineItems", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Information [Line Items]", "label": "Document Information [Line Items]", "documentation": "Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table." } } }, "auth_ref": [] }, "dei_DocumentInformationTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentInformationTable", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Information [Table]", "label": "Document Information [Table]", "documentation": "Container to support the formal attachment of each official or unofficial, public or private document as part of a submission package." } } }, "auth_ref": [] }, "dei_DocumentPeriodEndDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentPeriodEndDate", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Period End Date", "label": "Document Period End Date", "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD." } } }, "auth_ref": [] }, "dei_DocumentRegistrationStatement": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentRegistrationStatement", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Registration Statement", "label": "Document Registration Statement", "documentation": "Boolean flag that is true only for a form used as a registration statement." } } }, "auth_ref": [ "r461" ] }, "dei_DocumentShellCompanyReport": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentShellCompanyReport", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Shell Company Report", "label": "Document Shell Company Report", "documentation": "Boolean flag that is true for a Shell Company Report pursuant to section 13 or 15(d) of the Exchange Act." } } }, "auth_ref": [ "r466" ] }, "dei_DocumentTransitionReport": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentTransitionReport", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Transition Report", "label": "Document Transition Report", "documentation": "Boolean flag that is true only for a form used as a transition report." } } }, "auth_ref": [ "r510" ] }, "dei_DocumentType": { "xbrltype": "submissionTypeItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentType", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Document Type", "label": "Document Type", "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'." } } }, "auth_ref": [] }, "bti_DoubleTaxationReliefOnUKProfits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DoubleTaxationReliefOnUKProfits", "crdr": "credit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": -1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Double taxation relief on UK profits", "label": "Double Taxation Relief On U K Profits", "documentation": "Double taxation relief on UK profits." } } }, "auth_ref": [] }, "bti_DutyExciseAndOtherTaxesLeviedOnTobaccoAndTobaccoRelatedProducts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DutyExciseAndOtherTaxesLeviedOnTobaccoAndTobaccoRelatedProducts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/GroupIncomeStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Duty excise and other taxes levied on tobacco and tobacco related products", "label": "Duty Excise And Other Taxes Levied On Tobacco And Tobacco Related Products", "documentation": "Duty excise and other taxes levied on tobacco and tobacco related products." } } }, "auth_ref": [] }, "bti_DutyExciseAndOtherTaxesPayable": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "DutyExciseAndOtherTaxesPayable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Duty, excise and other taxes", "label": "Duty Excise And Other Taxes Payable", "documentation": "Duty excise and other taxes payable." } } }, "auth_ref": [] }, "ecd_DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "DvddsOrOthrErngsPdOnEqtyAwrdsNtOthrwsRflctdInTtlCompForCvrdYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member]", "terseLabel": "Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year" } } }, "auth_ref": [ "r521" ] }, "currency_EGP": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "EGP", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Egypt, Pounds", "label": "Egypt, Pounds" } } }, "auth_ref": [] }, "bti_ESGInvestmentEquipmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ESGInvestmentEquipmentMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "ESG investment equipment", "label": "ESG Investment Equipment [Member]", "documentation": "ESG Investment Equipment" } } }, "auth_ref": [] }, "bti_ETIMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ETIMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "ETI", "label": "ETI [Member]", "documentation": "ETI." } } }, "auth_ref": [] }, "currency_EUR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "EUR", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Euro", "label": "Euro Member Countries, Euro" } } }, "auth_ref": [] }, "ifrs-full_EarningsPerShareAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EarningsPerShareAbstract", "presentation": [ "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Earnings/(loss) per share", "label": "Earnings per share [abstract]" } } }, "auth_ref": [] }, "ifrs-full_EarningsPerShareExplanatory": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EarningsPerShareExplanatory", "presentation": [ "http://www.bat.com/role/EarningspershareTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Reconciliation from Basic to Diluted Earnings Per Share", "label": "Earnings per share [text block]" } }, "en": { "role": { "documentation": "The disclosure of earnings per share." } } }, "auth_ref": [ "r135" ] }, "ifrs-full_EarningsPerShareLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EarningsPerShareLineItems", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Earnings per share [line items]", "label": "Earnings per share [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "bti_EarningsPerShareMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EarningsPerShareMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Earnings Per Share", "label": "Earnings Per Share [Member]", "documentation": "Earnings per share." } } }, "auth_ref": [] }, "ifrs-full_EarningsPerShareTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EarningsPerShareTable", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Earnings per share [table]", "label": "Earnings per share [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to earnings per share." } } }, "auth_ref": [ "r135" ] }, "bti_EffectOfAdjustingTaxItemsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAdjustingTaxItemsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjusting items in tax", "label": "Effect Of Adjusting Tax Items On Earnings Basic", "documentation": "" } } }, "auth_ref": [] }, "bti_EffectOfAdjustingTaxItemsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAdjustingTaxItemsOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Adjusting items in tax", "label": "Effect Of Adjusting Tax Items On Earnings Diluted", "documentation": "Effect of retrospective guidance on WHT on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfAdjustingTaxItemsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAdjustingTaxItemsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of adjusting items in tax (in GBP per share)", "label": "Effect Of Adjusting Tax Items On Earnings Per Share Basic", "documentation": "Effect of retrospective guidance on WHT on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfAdjustingTaxItemsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAdjustingTaxItemsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of adjusting items in tax (in GBP per share)", "label": "Effect Of Adjusting Tax Items On Earnings Per Share Diluted", "documentation": "Effect of retrospective guidance on WHT on earnings per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of amortisation and impairment of goodwill, trademarks and similar intangibles", "label": "Effect Of Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Basic", "documentation": "Effect of amortisation and impairment of trademarks and similar intangibles on earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 21.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of amortisation and impairment of goodwill, trademarks and similar intangibles", "label": "Effect Of Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Diluted", "documentation": "Effect of amortisation and impairment of trademarks and similar intangibles on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 24.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of amortisation and impairment of goodwill, trademarks and similar intangibles (in GBP per share)", "label": "Effect Of Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Per Share Basic", "documentation": "Effect of amortisation and impairment of trademarks and similar intangibles on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 22.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of amortisation and impairment of goodwill, trademarks and similar intangibles per share (in GBP per share)", "label": "Effect Of Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Per Share Diluted", "documentation": "Effect of amortisation and impairment of trademarks and similar intangibles on earnings per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Effect of associates' adjusting items net of tax", "label": "Effect Of Associates Adjusting Items Net Of Tax On Earnings Basic", "documentation": "Effect of associates adjusting items net of tax on earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 15.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Effect of associates' adjusting items net of tax", "label": "Effect Of Associates Adjusting Items Net Of Tax On Earnings Diluted", "documentation": "Effect of associates adjusting items net of tax on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of associates' adjusting items net of tax (in GBP per share)", "label": "Effect Of Associates Adjusting Items Net Of Tax On Earnings Per Share Basic", "documentation": "Effect of associates adjusting items net of tax on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfAssociatesAdjustingItemsNetOfTaxOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 17.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of associates' adjusting items net of tax (in GBP per share)", "label": "Effect Of Associates Adjusting Items Net Of Tax On Earnings Per Share Diluted", "documentation": "Effect of associates adjusting items net of tax on earnings per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfBrazilAndRomaniaOtherTaxesDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfBrazilAndRomaniaOtherTaxesDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 28.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of Romania and Brazil other taxes", "label": "Effect Of Brazil And Romania Other Taxes Diluted", "documentation": "Effect of excise and VAT disputes diluted." } } }, "auth_ref": [] }, "bti_EffectOfBrazilAndRomaniaOtherTaxesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfBrazilAndRomaniaOtherTaxesOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 22.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of Romania and Brazil other taxes", "label": "Effect Of Brazil And Romania Other Taxes On Earnings Basic", "documentation": "Effect of excise and VAT disputes basic." } } }, "auth_ref": [] }, "bti_EffectOfBrazilAndRomaniaOtherTaxesPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfBrazilAndRomaniaOtherTaxesPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 26.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of excise and VAT disputes (in GBP per share)", "label": "Effect Of Brazil And Romania Other Taxes Per Share Basic", "documentation": "Effect of excise and VAT disputes per share basic." } } }, "auth_ref": [] }, "bti_EffectOfBrazilAndRomaniaOtherTaxesPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfBrazilAndRomaniaOtherTaxesPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 23.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of Romania and Brazil other taxes (in GBP per share)", "label": "Effect Of Brazil And Romania Other Taxes Per Share Diluted", "documentation": "Effect of excise and VAT disputes per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfDOJAndOFACChargesEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDOJAndOFACChargesEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 13.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of charges in respect of DOJ and OFAC investigations", "label": "Effect Of DOJ And OFAC Charges Earnings Diluted", "documentation": "Effect Of DOJ And OFAC Charges Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfDOJAndOFACChargesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDOJAndOFACChargesOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of charges in respect of DOJ and OFAC investigations", "label": "Effect Of DOJ And OFAC Charges On Earnings Basic", "documentation": "Effect Of DOJ And OFAC Charges On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfDOJAndOFACChargesPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDOJAndOFACChargesPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 18.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of charges in respect of DOJ and OFAC investigations (in GBP per share)", "label": "Effect Of DOJ And OFAC Charges Per Share Basic", "documentation": "Effect Of DOJ And OFAC Charges Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfDOJAndOFACChargesPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDOJAndOFACChargesPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of charges in respect of DOJ and OFAC investigations (in GBP per share)", "label": "Effect Of DOJ And OFAC Charges Per Share Diluted", "documentation": "Effect Of DOJ And OFAC Charges Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfDisposalOfSubsidiariesEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDisposalOfSubsidiariesEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 29.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of disposal of subsidiaries", "label": "Effect Of Disposal Of Subsidiaries Earnings Diluted", "documentation": "Effect of disposal of BAT pars earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfDisposalOfSubsidiariesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDisposalOfSubsidiariesOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 12.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of disposal of subsidiaries", "label": "Effect Of Disposal Of Subsidiaries On Earnings Basic", "documentation": "Effect of disposal of BAT pars earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfDisposalOfSubsidiariesPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDisposalOfSubsidiariesPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 21.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of disposal of subsidiaries (in GBP per share)", "label": "Effect Of Disposal Of Subsidiaries Per Share Basic", "documentation": "Effect of disposal of BAT pars per share basic." } } }, "auth_ref": [] }, "bti_EffectOfDisposalOfSubsidiariesPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfDisposalOfSubsidiariesPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 21.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of disposal of subsidiaries (in GBP per share)", "label": "Effect Of Disposal Of Subsidiaries Per Share Diluted", "documentation": "Effect of disposal of BAT pars per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfEarlyRepurchaseOfBondsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfEarlyRepurchaseOfBondsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 24.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of early repurchase of bonds", "label": "Effect Of Early Repurchase Of Bonds On Earnings Basic", "documentation": "Effect of early repurchase of bonds on earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfEarlyRepurchaseOfBondsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfEarlyRepurchaseOfBondsOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of early repurchase of bonds", "label": "Effect Of Early Repurchase Of Bonds On Earnings Diluted", "documentation": "Effect of early repurchase of bonds on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfEarlyRepurchaseOfBondsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfEarlyRepurchaseOfBondsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of early repurchase of bonds (in GBP per share)", "label": "Effect Of Early Repurchase Of Bonds On Earnings Per Share Basic", "documentation": "Effect of early repurchase of bonds on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfEarlyRepurchaseOfBondsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfEarlyRepurchaseOfBondsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of early repurchase of bonds (in GBP per share)", "label": "Effect Of Early Repurchase Of Bonds On Earnings Per Share Diluted", "documentation": "Effect of early repurchase of bonds on earnings per share diluted." } } }, "auth_ref": [] }, "ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EffectOfExchangeRateChangesOnCashAndCashEquivalents", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "label": "Effect of exchange rate changes on cash and cash equivalents" } }, "en": { "role": { "documentation": "The effect of exchange rate changes on cash and cash equivalents held or due in a foreign currency. [Refer: Cash and cash equivalents]" } } }, "auth_ref": [ "r190", "r191" ] }, "bti_EffectOfExciseAndVATCaseOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfExciseAndVATCaseOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 15.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Net effect of excise and VAT cases", "label": "Effect Of Excise And VAT Case On Earnings Basic", "documentation": "Effect Of Excise And VAT Case On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfExciseAndVATCasePerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfExciseAndVATCasePerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of Brazil excise & VAT case (in GBP per share)", "label": "Effect Of Excise And VAT Case Per Share Basic", "documentation": "Effect Of Excise And VAT Case Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfExciseVATCaseEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfExciseVATCaseEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Net effect of excise and VAT cases", "label": "Effect Of Excise & VAT Case Earnings Diluted", "documentation": "Effect Of Excise & VAT Case Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfExciseVATCasePerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfExciseVATCasePerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of Brazil excise & VAT case per share (in GBP per share)", "label": "Effect Of Excise & VAT Case Per Share Diluted", "documentation": "Effect Of Excise & VAT Case Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCOnEarningBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCOnEarningBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 25.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Effect of gains related to the partial divestment of shares held in ITC", "label": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC On Earning Basic", "documentation": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC On Earning Basic" } } }, "auth_ref": [] }, "bti_EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCOnEarningDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCOnEarningDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 12.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Effect of gains related to the partial divestment of shares held in\u00a0ITC", "label": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC On Earning Diluted", "documentation": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC On Earning Diluted" } } }, "auth_ref": [] }, "bti_EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of gains related to the partial divestment of shares held in ITC (in GBP per share)", "label": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC Per Share Basic", "documentation": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfGainsRelatedToThePartialDivestmentOfSharesHeldInITCPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 31.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of gains related to the partial divestment of shares held in ITC (in GBP per share)", "label": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC Per Share Diluted", "documentation": "Effect Of Gains Related To The Partial Divestment Of Shares Held In ITC Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentChargesInRespectOfFixedAssetsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentChargesInRespectOfFixedAssetsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment charges in respect of\u00a0property, plant and equipment", "label": "Effect Of Impairment Charges In Respect Of Fixed Assets On Earnings Basic", "documentation": "Effect Of Impairment Charges In Respect Of Fixed Assets On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentChargesInRespectOfFixedAssetsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentChargesInRespectOfFixedAssetsOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment charges in respect of\u00a0property, plant and equipment", "label": "Effect Of Impairment Charges In Respect Of Fixed Assets On Earnings Diluted", "documentation": "Effect Of Impairment Charges In Respect Of Fixed Assets On Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentChargesInRespectOfFixedAssetsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentChargesInRespectOfFixedAssetsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment charges in respect of fixed assets, including the Group's head office in London (in GBP per share)", "label": "Effect Of Impairment Charges In Respect Of Fixed Assets Per Share Basic", "documentation": "Effect Of Impairment Charges In Respect Of Fixed Assets Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentChargesInRespectOfFixedAssetsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentChargesInRespectOfFixedAssetsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment charges in respect of fixed assets, including the Group's head office in London (in GBP per share)", "label": "Effect Of Impairment Charges In Respect Of Fixed Assets Per Share Diluted", "documentation": "Effect Of Impairment Charges In Respect Of Fixed Assets Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 29.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of planned disposal of subsidiaries", "label": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Basic", "documentation": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of planned disposal of subsidiaries", "label": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Diluted", "documentation": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 22.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment on held-for-sale assets and associated costs (in GBP per share)", "label": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Basic", "documentation": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfImpairmentReversalOfImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 15.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment on held-for-sale assets and associated costs (in GBP per share)", "label": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Diluted", "documentation": "Effect Of Impairment (Reversal Of Impairment) Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfInterestClaimsOnSettlementAndOtherOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfInterestClaimsOnSettlementAndOtherOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 18.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of interest on FII GLO settlement and\u00a0other", "label": "Effect Of Interest Claims On Settlement And Other On Earnings Basic", "documentation": "Effect of interest claims on settlement and other on earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfInterestClaimsOnSettlementAndOtherOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfInterestClaimsOnSettlementAndOtherOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 26.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of interest on FII GLO settlement and\u00a0other", "label": "Effect Of Interest Claims On Settlement And Other On Earnings Diluted", "documentation": "Effect of interest claims on settlement and other on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfInterestClaimsOnSettlementAndOtherOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfInterestClaimsOnSettlementAndOtherOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of interest on FII GLO settlement and other (in GBP per share)", "label": "Effect Of Interest Claims On Settlement And Other On Earnings Per Share Basic", "documentation": "Effect of interest claims on settlement and other on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfInterestClaimsOnSettlementAndOtherOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfInterestClaimsOnSettlementAndOtherOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of interest on FII GLO settlement and other (in GBP per share)", "label": "Effect Of Interest Claims On Settlement And Other On Earnings Per Share Diluted", "documentation": "Effect of interest claims on settlement and other on earnings per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfRestructuringAndIntegrationCostsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfRestructuringAndIntegrationCostsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of restructuring and integration costs", "label": "Effect Of Restructuring And Integration Costs On Earnings Basic", "documentation": "Effect of restructuring and integration costs on earnings basic." } } }, "auth_ref": [] }, "bti_EffectOfRestructuringAndIntegrationCostsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfRestructuringAndIntegrationCostsOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 18.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of restructuring and integration costs", "label": "Effect Of Restructuring And Integration Costs On Earnings Diluted", "documentation": "Effect of restructuring and integration costs on earnings diluted." } } }, "auth_ref": [] }, "bti_EffectOfRestructuringAndIntegrationCostsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfRestructuringAndIntegrationCostsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 17.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of restructuring and integration costs (in GBP per share)", "label": "Effect Of Restructuring And Integration Costs On Earnings Per Share Basic", "documentation": "Effect of restructuring and integration costs on earnings per share basic." } } }, "auth_ref": [] }, "bti_EffectOfRestructuringAndIntegrationCostsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfRestructuringAndIntegrationCostsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of restructuring and integration costs per share (in GBP per share)", "label": "Effect Of Restructuring And Integration Costs On Earnings Per Share Diluted", "documentation": "Effect of restructuring and integration costs on earnings per share diluted." } } }, "auth_ref": [] }, "bti_EffectOfSettlementOfHistoricalLitigationOnEarningBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfSettlementOfHistoricalLitigationOnEarningBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Effect of settlement of historical litigation in\u00a0relation to the Fox River", "label": "Effect Of Settlement Of Historical Litigation On Earning Basic", "documentation": "Effect Of Settlement Of Historical Litigation On Earning Basic" } } }, "auth_ref": [] }, "bti_EffectOfSettlementOfHistoricalLitigationOnEarningDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfSettlementOfHistoricalLitigationOnEarningDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 16.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Effect of settlement of historical litigation in\u00a0relation to the Fox River", "label": "Effect Of Settlement Of Historical Litigation On Earning Diluted", "documentation": "Effect Of Settlement Of Historical Litigation On Earning Diluted" } } }, "auth_ref": [] }, "bti_EffectOfSettlementOfHistoricalLitigationPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfSettlementOfHistoricalLitigationPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 29.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of settlement of historical litigation in\u00a0relation to the Fox River (in GBP per share)", "label": "Effect Of Settlement Of Historical Litigation Per Share Basic", "documentation": "Effect Of Settlement Of Historical Litigation Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfSettlementOfHistoricalLitigationPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfSettlementOfHistoricalLitigationPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 19.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of settlement of historical litigation in relation to the Fox River (in GBP per share)", "label": "Effect Of Settlement Of Historical Litigation Per Share Diluted", "documentation": "Effect Of Settlement Of Historical Litigation Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfTaxOnExciseVATCaseEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTaxOnExciseVATCaseEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 25.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on excise and VAT cases", "label": "Effect Of Tax On Excise & VAT Case Earnings Diluted", "documentation": "Effect Of Tax On Excise & VAT Case Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfTaxOnExciseVATCaseOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTaxOnExciseVATCaseOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 19.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on excise and VAT cases", "label": "Effect Of Tax On Excise & VAT Case On Earnings Basic", "documentation": "Effect Of Tax On Excise & VAT Case On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfTaxOnExciseVATCasePerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTaxOnExciseVATCasePerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 14.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on Brazil excise & VAT case (in GBP per share)", "label": "Effect Of Tax On Excise & VAT Case Per Share Basic", "documentation": "Effect Of Tax On Excise & VAT Case Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfTaxOnExciseVATCasePerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTaxOnExciseVATCasePerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 18.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on Brazil excise & VAT case per share (in GBP per share)", "label": "Effect Of Tax On Excise & VAT Case Per Share Diluted", "documentation": "Effect Of Tax On Excise & VAT Case Per Share Diluted" } } }, "auth_ref": [] }, "bti_EffectOfTheOngoingLitigationInCanadaOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTheOngoingLitigationInCanadaOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 28.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of the ongoing litigation in Canada", "label": "Effect Of The Ongoing Litigation in Canada On Earnings Basic", "documentation": "Effect Of The Ongoing Litigation in Canada On Earnings Basic" } } }, "auth_ref": [] }, "bti_EffectOfTheOngoingLitigationInCanadaOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTheOngoingLitigationInCanadaOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 27.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of the ongoing litigation in Canada", "label": "Effect Of The Ongoing Litigation in Canada On Earnings Diluted", "documentation": "Effect Of The Ongoing Litigation in Canada On Earnings Diluted" } } }, "auth_ref": [] }, "bti_EffectOfTheOngoingLitigationInCanadaPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTheOngoingLitigationInCanadaPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 12.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of the ongoing litigation in Canada (in GBP per share)", "label": "Effect Of The Ongoing Litigation in Canada Per Share Basic", "documentation": "Effect Of The Ongoing Litigation in Canada Per Share Basic" } } }, "auth_ref": [] }, "bti_EffectOfTheOngoingLitigationInCanadaPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EffectOfTheOngoingLitigationInCanadaPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 27.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of the ongoing litigation in Canada (in GPB per share)", "label": "Effect Of The Ongoing Litigation In Canada Per Share Diluted", "documentation": "Effect Of The Ongoing Litigation In Canada Per Share Diluted" } } }, "auth_ref": [] }, "bti_EightYearTranchesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EightYearTranchesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Eight year tranches", "label": "Eight Year Tranches [Member]", "documentation": "Eight year tranches." } } }, "auth_ref": [] }, "bti_EmbeddedDerivativeRelatingToAssociatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EmbeddedDerivativeRelatingToAssociatesMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "\u2013 embedded derivative relating to associates", "label": "Embedded Derivative Relating To Associates [Member]", "documentation": "Embedded Derivative Relating To Associates" } } }, "auth_ref": [] }, "ifrs-full_EmployeeBenefitsExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EmployeeBenefitsExpense", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": -1.0, "order": 1.0 }, "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Employee benefit costs", "totalLabel": "Employee benefit costs", "label": "Employee benefits expense" } }, "en": { "role": { "documentation": "The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment." } } }, "auth_ref": [ "r0", "r61", "r378" ] }, "bti_EmployeeRelatedBenefitsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EmployeeRelatedBenefitsMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Employee-related benefits", "label": "Employee Related Benefits [Member]", "documentation": "Employee related benefits." } } }, "auth_ref": [] }, "bti_EmployeeShareOptionsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EmployeeShareOptionsAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Employee share options", "label": "Employee Share Options [Abstract]", "documentation": "Employee Share Options" } } }, "auth_ref": [] }, "us-gaap_EmployeeStockOptionMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "EmployeeStockOptionMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Employee Stock Option [Member]", "terseLabel": "Employee Stock Option" } } }, "auth_ref": [] }, "bti_EngleAndOtherLitigationsCostsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EngleAndOtherLitigationsCostsMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Engle and Other Litigations Costs", "label": "Engle And Other Litigations Costs [Member]", "documentation": "Engle and other litigations costs." } } }, "auth_ref": [] }, "bti_EngleAndOtherLitigationsCostsNPMAdjustmentCreditMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EngleAndOtherLitigationsCostsNPMAdjustmentCreditMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Engle and Other Litigations Costs, NPM adjustment credit", "label": "Engle And Other Litigations Costs, NPM Adjustment Credit [Member]", "documentation": "Engle And Other Litigations Costs, NPM Adjustment Credit" } } }, "auth_ref": [] }, "bti_EngleClassActionAndEngleProgenyCasesFloridaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EngleClassActionAndEngleProgenyCasesFloridaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Engle class action and Engle Progeny cases Florida", "label": "Engle Class Action And Engle Progeny Cases Florida [Member]", "documentation": "Engle Class Action and Engle Progeny Cases (Florida)." } } }, "auth_ref": [] }, "bti_EngleProgenyCasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EngleProgenyCasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Engle Progeny cases", "label": "Engle Progeny Cases [Member]", "documentation": "Engle progeny cases." } } }, "auth_ref": [] }, "bti_EngleProgenyCasesUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EngleProgenyCasesUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Engle Progeny Cases", "label": "Engle Progeny Cases U S Tobacco Related [Member]", "documentation": "Engle Progeny cases, US tobacco related." } } }, "auth_ref": [] }, "dei_EntityAddressAddressLine1": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressAddressLine1", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Address, Address Line One", "label": "Entity Address, Address Line One", "documentation": "Address Line 1 such as Attn, Building Name, Street Name" } } }, "auth_ref": [] }, "dei_EntityAddressAddressLine2": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressAddressLine2", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Address, Address Line Two", "label": "Entity Address, Address Line Two", "documentation": "Address Line 2 such as Street or Suite number" } } }, "auth_ref": [] }, "dei_EntityAddressCityOrTown": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressCityOrTown", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Address, City or Town", "label": "Entity Address, City or Town", "documentation": "Name of the City or Town" } } }, "auth_ref": [] }, "dei_EntityAddressCountry": { "xbrltype": "countryCodeItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressCountry", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Address, Country", "label": "Entity Address, Country", "documentation": "ISO 3166-1 alpha-2 country code." } } }, "auth_ref": [] }, "dei_EntityAddressPostalZipCode": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressPostalZipCode", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Address, Postal Zip Code", "label": "Entity Address, Postal Zip Code", "documentation": "Code for the postal or zip code" } } }, "auth_ref": [] }, "dei_EntityAddressesAddressTypeAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityAddressesAddressTypeAxis", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Addresses, Address Type [Axis]", "label": "Entity Addresses, Address Type [Axis]", "documentation": "The axis of a table defines the relationship between the domain members or categories in the table and the line items or concepts that complete the table." } } }, "auth_ref": [] }, "dei_EntityCentralIndexKey": { "xbrltype": "centralIndexKeyItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityCentralIndexKey", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Central Index Key", "label": "Entity Central Index Key", "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK." } } }, "auth_ref": [ "r463" ] }, "dei_EntityCommonStockSharesOutstanding": { "xbrltype": "sharesItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityCommonStockSharesOutstanding", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Common Stock Shares Outstanding", "label": "Entity Common Stock, Shares Outstanding", "documentation": "Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument." } } }, "auth_ref": [] }, "dei_EntityCurrentReportingStatus": { "xbrltype": "yesNoItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityCurrentReportingStatus", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Current Reporting Status", "label": "Entity Current Reporting Status", "documentation": "Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure." } } }, "auth_ref": [] }, "dei_EntityDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Entity [Domain]", "label": "Entity [Domain]", "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains." } } }, "auth_ref": [] }, "dei_EntityEmergingGrowthCompany": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityEmergingGrowthCompany", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Emerging Growth Company", "label": "Entity Emerging Growth Company", "documentation": "Indicate if registrant meets the emerging growth company criteria." } } }, "auth_ref": [ "r463" ] }, "dei_EntityFileNumber": { "xbrltype": "fileNumberItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityFileNumber", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity File Number", "label": "Entity File Number", "documentation": "Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen." } } }, "auth_ref": [] }, "dei_EntityFilerCategory": { "xbrltype": "filerCategoryItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityFilerCategory", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Filer Category", "label": "Entity Filer Category", "documentation": "Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure." } } }, "auth_ref": [ "r463" ] }, "dei_EntityIncorporationStateCountryCode": { "xbrltype": "edgarStateCountryItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityIncorporationStateCountryCode", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Incorporation, State or Country Code", "label": "Entity Incorporation, State or Country Code", "documentation": "Two-character EDGAR code representing the state or country of incorporation." } } }, "auth_ref": [] }, "dei_EntityInteractiveDataCurrent": { "xbrltype": "yesNoItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityInteractiveDataCurrent", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Interactive Data Current", "label": "Entity Interactive Data Current", "documentation": "Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files)." } } }, "auth_ref": [ "r572" ] }, "dei_EntityRegistrantName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityRegistrantName", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Registrant Name", "label": "Entity Registrant Name", "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC." } } }, "auth_ref": [ "r463" ] }, "dei_EntityShellCompany": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityShellCompany", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Shell Company", "label": "Entity Shell Company", "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act." } } }, "auth_ref": [ "r463" ] }, "dei_EntityVoluntaryFilers": { "xbrltype": "yesNoItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityVoluntaryFilers", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Voluntary Filers", "label": "Entity Voluntary Filers", "documentation": "Indicate 'Yes' or 'No' if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act." } } }, "auth_ref": [] }, "dei_EntityWellKnownSeasonedIssuer": { "xbrltype": "yesNoItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityWellKnownSeasonedIssuer", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Entity Well-known Seasoned Issuer", "label": "Entity Well-known Seasoned Issuer", "documentation": "Indicate 'Yes' or 'No' if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Is used on Form Type: 10-K, 10-Q, 8-K, 20-F, 6-K, 10-K/A, 10-Q/A, 20-F/A, 6-K/A, N-CSR, N-Q, N-1A." } } }, "auth_ref": [ "r573" ] }, "bti_EnvironmentalCleanUpCostsPaid": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EnvironmentalCleanUpCostsPaid", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payments for funding agreement", "label": "Environmental Clean Up Costs Paid", "documentation": "Environmental clean up costs paid." } } }, "auth_ref": [] }, "bti_EnvironmentalCleanUpCostsPaidByRelatedParty": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EnvironmentalCleanUpCostsPaidByRelatedParty", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Environmental clean-up costs paid by related party", "label": "Environmental Clean Up Costs Paid By Related Party", "documentation": "Environmental clean up costs paid by related party." } } }, "auth_ref": [] }, "bti_EnvironmentalSocialAndGovernanceCapitalExpenditures": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EnvironmentalSocialAndGovernanceCapitalExpenditures", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": "bti_SustainabilityCostsCapitalExpenditures", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sustainability costs expenditures", "label": "Environmental, Social and Governance Capital Expenditures", "documentation": "Environmental, Social and Governance Capital Expenditures" } } }, "auth_ref": [] }, "ecd_EqtyAwrdsAdjFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "EqtyAwrdsAdjFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Equity Awards Adjustments, Footnote [Text Block]", "terseLabel": "Equity Awards Adjustments, Footnote" } } }, "auth_ref": [ "r515" ] }, "ecd_EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "EqtyAwrdsAdjsExclgValRprtdInSummryCompstnTblMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]", "terseLabel": "Equity Awards Adjustments, Excluding Value Reported in Compensation Table" } } }, "auth_ref": [ "r568" ] }, "ecd_EqtyAwrdsAdjsMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "EqtyAwrdsAdjsMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Equity Awards Adjustments [Member]", "terseLabel": "Equity Awards Adjustments" } } }, "auth_ref": [ "r568" ] }, "ecd_EqtyAwrdsInSummryCompstnTblForAplblYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "EqtyAwrdsInSummryCompstnTblForAplblYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]", "terseLabel": "Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table" } } }, "auth_ref": [ "r568" ] }, "ifrs-full_Equity": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Equity", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAndLiabilities", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "periodStartLabel": "Balance, beginning", "periodEndLabel": "Balance, ending", "totalLabel": "Total equity", "terseLabel": "Total equity", "label": "Equity" } }, "en": { "role": { "documentation": "The amount of residual interest in the assets of the entity after deducting all its liabilities." } } }, "auth_ref": [ "r23", "r33", "r200", "r202", "r230", "r231", "r233" ] }, "ifrs-full_EquityAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityAbstract", "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Equity \u2013 capital and reserves", "label": "Equity [abstract]" } } }, "auth_ref": [] }, "ifrs-full_EquityAndLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityAndLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "totalLabel": "Total equity and liabilities", "label": "Equity and liabilities" } }, "en": { "role": { "documentation": "The amount of the entity's equity and liabilities. [Refer: Equity; Liabilities]" } } }, "auth_ref": [ "r23" ] }, "ifrs-full_EquityAndLiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityAndLiabilitiesAbstract", "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Equity and Liabilities", "label": "Equity and liabilities [abstract]" } } }, "auth_ref": [] }, "bti_EquityAttributableToNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EquityAttributableToNoncontrollingInterests", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "\u2013 Attributable to non-controlling interests", "label": "Equity Attributable To Noncontrolling Interests", "documentation": "Equity attributable to non-controlling interests." } } }, "auth_ref": [] }, "ifrs-full_EquityAttributableToOwnersOfParent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityAttributableToOwnersOfParent", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "totalLabel": "Owners of the parent", "label": "Equity attributable to owners of parent" } }, "en": { "role": { "documentation": "The amount of equity attributable to the owners of the parent. This specifically excludes non-controlling interest." } } }, "auth_ref": [ "r22" ] }, "ifrs-full_EquityAttributableToOwnersOfParentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityAttributableToOwnersOfParentMember", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Total attributable to owners of parent", "label": "Equity attributable to owners of parent [member]" } }, "en": { "role": { "documentation": "This member stands for equity attributable to the owners of the parent." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EquityInstrumentsAmountContributedToFairValueOfPlanAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails": { "parentTag": "ifrs-full_PlanAssetsAtFairValue", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Equities", "label": "Equity instruments, amount contributed to fair value of plan assets" } }, "en": { "role": { "documentation": "The amount instruments representing equity (rather than debt) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]]" } } }, "auth_ref": [ "r400" ] }, "srt_EquityMethodInvesteeNameDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "EquityMethodInvesteeNameDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investment, Name [Domain]", "label": "Investment, Name [Domain]", "documentation": "Name of investment including named security. Excludes entity that is consolidated." } } }, "auth_ref": [] }, "bti_EquitySettledDeferredShareBonusSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EquitySettledDeferredShareBonusSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DSBS, Equity-settled", "label": "Equity Settled Deferred Share Bonus Scheme [Member]", "documentation": "This member stands for equity settled deferred shared bonus scheme." } } }, "auth_ref": [] }, "bti_EquitySettledLongTermIncentivePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EquitySettledLongTermIncentivePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Equity Settled Long Term Incentive Plan", "label": "Equity Settled Long Term Incentive Plan [Member]", "documentation": "The member stands for equity settled long-term incentive plan." } } }, "auth_ref": [] }, "bti_EquitySettledMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EquitySettledMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Equity-settled", "label": "Equity Settled [Member]", "documentation": "This member stands for equity settled share-based payment awards." } } }, "auth_ref": [] }, "bti_EquitySettledOtherSchemesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EquitySettledOtherSchemesMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other schemes, Equity-settled", "label": "Equity Settled Other Schemes [Member]", "documentation": "The member stands for equity settled other schemes." } } }, "auth_ref": [] }, "ecd_EquityValuationAssumptionDifferenceFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "EquityValuationAssumptionDifferenceFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Equity Valuation Assumption Difference, Footnote [Text Block]", "terseLabel": "Equity Valuation Assumption Difference, Footnote" } } }, "auth_ref": [ "r525" ] }, "ecd_ErrCompAnalysisTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ErrCompAnalysisTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Erroneous Compensation Analysis [Text Block]", "terseLabel": "Erroneous Compensation Analysis" } } }, "auth_ref": [ "r482", "r493", "r503", "r536" ] }, "ecd_ErrCompRecoveryTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ErrCompRecoveryTable", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Erroneously Awarded Compensation Recovery [Table]", "terseLabel": "Erroneously Awarded Compensation Recovery" } } }, "auth_ref": [ "r479", "r490", "r500", "r533" ] }, "ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EstimateOfContributionsExpectedToBePaidToPlan", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions to pension schemes, next fiscal year", "label": "Estimate of contributions expected to be paid to plan for next annual reporting period" } }, "en": { "role": { "documentation": "The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r100", "r102" ] }, "bti_EstimatedAnnualLossesOfClaims": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EstimatedAnnualLossesOfClaims", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Future annual losses", "label": "Estimated Annual Losses Of Claims", "documentation": "Estimated annual losses of claims." } } }, "auth_ref": [] }, "bti_EstimatedCleanUpCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EstimatedCleanUpCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total estimated clean-up costs", "label": "Estimated Clean Up Costs", "documentation": "Estimated clean up costs." } } }, "auth_ref": [] }, "ifrs-full_EstimatedFinancialEffectOfContingentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "EstimatedFinancialEffectOfContingentLiabilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Estimated financial effect of contingent liabilities", "terseLabel": "Tax assessment amount", "label": "Estimated financial effect of contingent liabilities" } }, "en": { "role": { "documentation": "The amount of the estimated financial effect of contingent liabilities. [Refer: Classes of contingent liabilities [domain]]" } } }, "auth_ref": [ "r163" ] }, "bti_EstimatedUnwindPercentageOfNoncurrentProvisions": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EstimatedUnwindPercentageOfNoncurrentProvisions", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Estimated unwind percentage of noncurrent provisions", "label": "Estimated Unwind Percentage Of Noncurrent Provisions", "documentation": "Estimated unwind percentage of noncurrent provisions." } } }, "auth_ref": [] }, "bti_EstimatedUnwindPercentageOfNoncurrentProvisionsRelatesToTerminationPayments": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EstimatedUnwindPercentageOfNoncurrentProvisionsRelatesToTerminationPayments", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Estimated unwind percentage of noncurrent provisions relates to termination payments", "label": "Estimated Unwind Percentage Of Noncurrent Provisions Relates To Termination Payments", "documentation": "Estimated unwind percentage of noncurrent provisions relates to termination payments." } } }, "auth_ref": [] }, "bti_EurobondsFourMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EurobondsFourMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Eurobonds Four", "label": "Eurobonds Four [Member]", "documentation": "Eurobonds four." } } }, "auth_ref": [] }, "bti_EurobondsOneMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EurobondsOneMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Eurobonds One", "label": "Eurobonds One [Member]", "documentation": "Eurobonds one." } } }, "auth_ref": [] }, "bti_EurobondsThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "EurobondsThreeMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Eurobonds Three", "label": "Eurobonds Three [Member]", "documentation": "Eurobonds three." } } }, "auth_ref": [] }, "srt_EuropeMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "EuropeMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Europe", "label": "Europe [Member]", "documentation": "Continent of Europe." } } }, "auth_ref": [ "r629", "r630", "r631", "r632" ] }, "bti_ExcessCapitalAllowancesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExcessCapitalAllowancesMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Excess of capital allowances over depreciation", "label": "Excess Capital Allowances [Member]", "documentation": "Excess Capital Allowances" } } }, "auth_ref": [] }, "bti_ExchangeDifferences": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExchangeDifferences", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Exchange differences", "label": "Exchange Differences", "documentation": "Exchange differences." } } }, "auth_ref": [] }, "ifrs-full_ExchangeDifferencesOnTranslationAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExchangeDifferencesOnTranslationAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign currency translation and hedges of net investments in foreign operations", "label": "Exchange differences on translation [abstract]" } } }, "auth_ref": [] }, "bti_ExciseAuditAmountPaidBeingAppealed": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExciseAuditAmountPaidBeingAppealed", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Excise paid", "label": "Excise Audit, Amount Paid Being Appealed", "documentation": "Excise Audit, Amount Paid Being Appealed" } } }, "auth_ref": [] }, "bti_ExciseIncomeOnSocialContributions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExciseIncomeOnSocialContributions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Excise income on social contributions", "label": "Excise Income on Social Contributions", "documentation": "Excise Income on Social Contributions" } } }, "auth_ref": [] }, "ecd_ExecutiveCategoryAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ExecutiveCategoryAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Executive Category [Axis]", "terseLabel": "Executive Category:" } } }, "auth_ref": [ "r531" ] }, "bti_ExecutiveDirectorsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExecutiveDirectorsMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Executive Directors", "label": "Executive Directors [Member]", "documentation": "Executive directors." } } }, "auth_ref": [] }, "srt_ExecutiveOfficerMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ExecutiveOfficerMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Executive director", "label": "Executive Officer [Member]", "documentation": "Person with designation of executive officer." } } }, "auth_ref": [] }, "bti_ExpectedContributionsToPlanByEmployerInYearFive": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpectedContributionsToPlanByEmployerInYearFive", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions to pension schemes, 2027", "label": "Expected Contributions To Plan By Employer In Year Five", "documentation": "Expected contributions to plan by employer in year five." } } }, "auth_ref": [] }, "bti_ExpectedContributionsToPlanByEmployerInYearFour": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpectedContributionsToPlanByEmployerInYearFour", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions to pension schemes, 2026", "label": "Expected Contributions To Plan By Employer In Year Four", "documentation": "Expected contributions to plan by employer in year four." } } }, "auth_ref": [] }, "bti_ExpectedContributionsToPlanByEmployerInYearThree": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpectedContributionsToPlanByEmployerInYearThree", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions to pension schemes. 2025", "label": "Expected Contributions To Plan By Employer In Year Three", "documentation": "Expected contributions to plan by employer in year three." } } }, "auth_ref": [] }, "bti_ExpectedContributionsToPlanByEmployerInYearTwo": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpectedContributionsToPlanByEmployerInYearTwo", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Company contributions to pension schemes, 2024", "label": "Expected Contributions To Plan By Employer In Year Two", "documentation": "Expected contributions to plan by employer in year two." } } }, "auth_ref": [] }, "ifrs-full_ExpectedDividendAsPercentageShareOptionsGranted": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExpectedDividendAsPercentageShareOptionsGranted", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expected dividend yield (%)", "label": "Expected dividend as percentage, share options granted" } }, "en": { "role": { "documentation": "The percentage of an expected dividend used to calculate the fair value of share options granted." } } }, "auth_ref": [ "r270" ] }, "bti_ExpectedUnwindPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpectedUnwindPeriod", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expected unwind period", "label": "Expected Unwind Period", "documentation": "Expected unwind period." } } }, "auth_ref": [] }, "ifrs-full_ExpenseByNatureAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExpenseByNatureAbstract", "lang": { "en-us": { "role": { "label": "Expenses by nature [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExpenseFromSharebasedPaymentTransactionsWithEmployees", "crdr": "debit", "calculation": { "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails": { "parentTag": "ifrs-full_EmployeeBenefitsExpense", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share-based payments - equity and cash-settled", "verboseLabel": "Total recognised in the income statement", "label": "Expense from share-based payment transactions with employees" } }, "en": { "role": { "documentation": "The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]" } } }, "auth_ref": [ "r578" ] }, "bti_ExpenseOfRestructuringActivitiesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpenseOfRestructuringActivitiesLineItems", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expense Of Restructuring Activities [Line Items]", "label": "Expense Of Restructuring Activities [Line Items]", "documentation": "Expense of restructuring activities." } } }, "auth_ref": [] }, "bti_ExpenseOfRestructuringActivitiesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExpenseOfRestructuringActivitiesTable", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expense Of Restructuring Activities [Table]", "label": "Expense Of Restructuring Activities [Table]", "documentation": "Schedule disclosing information related to expense of restructuring activities." } } }, "auth_ref": [] }, "ifrs-full_ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExpenseRelatingToLeasesOfLowvalueAssetsForWhichRecognitionExemptionHasBeenUsed", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expenses relating to leases of low-value assets", "label": "Expense relating to leases of low-value assets for which recognition exemption has been used" } }, "en": { "role": { "documentation": "The amount of the expense relating to leases of low-value assets accounted for applying paragraph 6 of IFRS 16. This expense shall not include the expense relating to short-term leases of low-value assets." } } }, "auth_ref": [ "r243" ] }, "ifrs-full_ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExpenseRelatingToShorttermLeasesForWhichRecognitionExemptionHasBeenUsed", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expenses relating to short-term leases", "label": "Expense relating to short-term leases for which recognition exemption has been used" } }, "en": { "role": { "documentation": "The amount of the expense relating to short-term leases accounted for applying paragraph 6 of IFRS 16. This expense need not include the expense relating to leases with a lease term of one month or less. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease." } } }, "auth_ref": [ "r242" ] }, "ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnFinancialPositions": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExplanationOfEffectOfSharebasedPaymentsOnFinancialPositions", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Share-based Payment Liability", "label": "Explanation of effect of share-based payments on entity's financial position [text block]" } }, "en": { "role": { "documentation": "The explanation that enables users of financial statements to understand the effect of share-based payment transactions on the entity's financial position." } } }, "auth_ref": [ "r272" ] }, "ifrs-full_ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss": { "xbrltype": "textBlockItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ExplanationOfEffectOfSharebasedPaymentsOnProfitOrLoss", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Share-based Payment Expense", "label": "Explanation of effect of share-based payments on entity's profit or loss [text block]" } }, "en": { "role": { "documentation": "The explanation that enables users of financial statements to understand the effect of share-based payment transactions on the entity's profit (loss)." } } }, "auth_ref": [ "r272" ] }, "bti_ExtensionPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExtensionPeriod", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Extension period", "label": "Extension Period", "documentation": "Extension Period" } } }, "auth_ref": [] }, "bti_ExtraPaymentOrderedByCourtAsBaseToCalculatePayment": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ExtraPaymentOrderedByCourtAsBaseToCalculatePayment", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Extra payment ordered by court as base to calculate payment", "label": "Extra Payment Ordered By Court As Base To Calculate Payment", "documentation": "Extra payment ordered by court as base to calculate payment." } } }, "auth_ref": [] }, "stpr_FL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "FL", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Florida", "label": "FLORIDA" } } }, "auth_ref": [] }, "bti_FacilityFees": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FacilityFees", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Facility fees", "label": "Facility Fees", "documentation": "Facility fees." } } }, "auth_ref": [] }, "ifrs-full_FactoringOfReceivablesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FactoringOfReceivablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Factoring of receivables", "label": "Factoring of receivables [member]" } }, "en": { "role": { "documentation": "This member stands for transactions in which an entity transfers its receivables to another party (the factor)." } } }, "auth_ref": [ "r451" ] }, "bti_FactoryClosureInSwitzerlandMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FactoryClosureInSwitzerlandMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Factory closure in switzerland", "label": "Factory Closure In Switzerland [Member]", "documentation": "Factory Closure In Switzerland" } } }, "auth_ref": [] }, "bti_FairValueChangeOnOtherFinancialItems": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FairValueChangeOnOtherFinancialItems", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value change on other financial items", "label": "Fair Value Change On Other Financial Items", "documentation": "Fair value change on other financial items." } } }, "auth_ref": [] }, "ifrs-full_FairValueHedgesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FairValueHedgesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value hedges", "label": "Fair value hedges [member]" } }, "en": { "role": { "documentation": "This member stands for hedges of the exposure to changes in fair value of a recognised asset or liability or an unrecognised firm commitment, or an identified portion of such an asset, liability or firm commitment, that is attributable to a particular risk and could affect profit or loss. [Refer: Types of hedges [domain]]" } } }, "auth_ref": [ "r178", "r296", "r301", "r304" ] }, "bti_FairValueMovementsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FairValueMovementsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other fair value movements", "verboseLabel": "Other fair value gains (losses)", "label": "Fair Value Movements Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Fair value movements of investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "ifrs-full_FairValueOfAssetsRepresentingContinuingInvolvementInDerecognisedFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FairValueOfAssetsRepresentingContinuingInvolvementInDerecognisedFinancialAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade receivables derecognised", "label": "Fair value of assets representing continuing involvement in derecognised financial assets" } }, "en": { "role": { "documentation": "The fair value of assets representing the entity's continuing involvement in derecognised financial assets. [Refer: Financial assets]" } } }, "auth_ref": [ "r317" ] }, "ifrs-full_FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FairValueOfInvestmentsInAssociatesWherePriceQuotationsPublished", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Market value of investments in associates", "label": "Fair value of investments in associates for which there are quoted market prices" } }, "en": { "role": { "documentation": "The fair value of investments in associates if there are quoted market prices for the investment. [Refer: Total for all associates [member]; Investments in associates reported in separate financial statements]" } } }, "auth_ref": [ "r213" ] }, "bti_FebruaryTwoThousandAndTwentyFiveMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FebruaryTwoThousandAndTwentyFiveMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "February 2025", "label": "February Two Thousand And Twenty Five [Member]", "documentation": "February Two Thousand And Twenty Five" } } }, "auth_ref": [] }, "bti_FederalAttorneysOfficeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FederalAttorneysOfficeMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Federal Attorney's office", "label": "Federal Attorneys Office [Member]", "documentation": "Federal Attorney's Office." } } }, "auth_ref": [] }, "bti_FilterCasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FilterCasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Filter cases", "label": "Filter Cases [Member]", "documentation": "Filter cases." } } }, "auth_ref": [] }, "bti_FilterCasesUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FilterCasesUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Filter Cases", "label": "Filter Cases U S Tobacco Related [Member]", "documentation": "Filter cases, US tobacco related." } } }, "auth_ref": [] }, "bti_FinalResolutionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FinalResolutionMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Final resolution", "label": "Final Resolution [Member]", "documentation": "Final resolution." } } }, "auth_ref": [] }, "ifrs-full_FinanceCosts": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinanceCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Finance costs", "label": "Finance costs" } }, "en": { "role": { "documentation": "The amount of costs associated with financing activities of the entity." } } }, "auth_ref": [ "r48" ] }, "ifrs-full_FinanceIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinanceIncome", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "negatedTotalLabel": "Finance income", "label": "Finance income" } }, "en": { "role": { "documentation": "The amount of income associated with interest and other financing activities of the entity." } } }, "auth_ref": [ "r585" ] }, "ifrs-full_FinanceIncomeCost": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinanceIncomeCost", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net finance costs", "negatedTerseLabel": "Net finance costs", "negatedTotalLabel": "Net finance costs", "verboseLabel": "Net finance income", "label": "Finance income (cost)" } }, "en": { "role": { "documentation": "The amount of income or cost associated with interest and other financing activities of the entity." } } }, "auth_ref": [ "r585" ] }, "ifrs-full_FinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Financial assets", "negatedPeriodStartLabel": "Allowance account for credit losses of financial assets at beginning of period", "negatedPeriodEndLabel": "Allowance account for credit losses of financial assets at end of period", "label": "Financial assets" } }, "en": { "role": { "documentation": "The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity\u2019s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity\u2019s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity\u2019s own equity instruments. For this purpose the entity\u2019s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity\u2019s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]" } } }, "auth_ref": [ "r306", "r310", "r311", "r315", "r447" ] }, "ifrs-full_FinancialAssetsAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialAssetsAtFairValue", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Assets at fair value", "label": "Financial assets, at fair value" } }, "en": { "role": { "documentation": "The fair value of financial assets. [Refer: At fair value [member]; Financial assets]" } } }, "auth_ref": [ "r306" ] }, "ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value through OCI", "label": "Financial assets at fair value through other comprehensive income, category [member]" } }, "en": { "role": { "documentation": "This member stands for the financial assets at fair value through other comprehensive income category. [Refer: Financial assets at fair value through other comprehensive income]" } } }, "auth_ref": [ "r323" ] }, "ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value through P&L", "label": "Financial assets at fair value through profit or loss, category [member]" } }, "en": { "role": { "documentation": "This member stands for the financial assets at fair value through profit or loss category. [Refer: Financial assets at fair value through profit or loss]" } } }, "auth_ref": [ "r322" ] }, "bti_FinancialDerivativeAssetsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FinancialDerivativeAssetsMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Financial assets", "label": "Financial Derivative Assets [Member]", "documentation": "Financial derivative assets." } } }, "auth_ref": [] }, "bti_FinancialDerivativeLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FinancialDerivativeLiabilitiesMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Financial liabilities", "label": "Financial Derivative Liabilities [Member]", "documentation": "Financial derivative liabilities." } } }, "auth_ref": [] }, "ifrs-full_FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialAssets", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Related amounts not offset in the Group balance sheet", "label": "Financial instruments subject to enforceable master netting arrangement or similar agreement not set off against financial assets" } }, "en": { "role": { "documentation": "The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial assets. [Refer: Financial assets]" } } }, "auth_ref": [ "r444", "r457" ] }, "ifrs-full_FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialInstrumentsSubjectToEnforceableMasterNettingArrangementOrSimilarAgreementNotSetOffAgainstFinancialLiabilities", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Related amounts not offset in the Group balance sheet", "label": "Financial instruments subject to enforceable master netting arrangement or similar agreement not set off against financial liabilities" } }, "en": { "role": { "documentation": "The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial liabilities. [Refer: Financial liabilities]" } } }, "auth_ref": [ "r444", "r457" ] }, "ifrs-full_FinancialLiabilitiesAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialLiabilitiesAtFairValue", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Liabilities at fair value", "label": "Financial liabilities, at fair value" } }, "en": { "role": { "documentation": "The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]" } } }, "auth_ref": [ "r306" ] }, "ifrs-full_FinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsForWhichSuppliersHaveReceivedPaymentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsForWhichSuppliersHaveReceivedPaymentMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts for which suppliers have received payment", "label": "Financial liabilities that are part of supplier finance arrangements for which suppliers have received payment [member]" } }, "en": { "role": { "documentation": "This member stands for financial liabilities that are part of a supplier finance arrangement for which suppliers have already received payment from the finance providers." } } }, "auth_ref": [ "r196" ] }, "ifrs-full_FinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FinancialLiabilitiesThatArePartOfSupplierFinanceArrangementsMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts accepted by financial institutions for early financing", "label": "Financial liabilities that are part of supplier finance arrangements [member]" } }, "en": { "role": { "documentation": "This member stands for financial liabilities that are part of a supplier finance arrangement." } } }, "auth_ref": [ "r195" ] }, "bti_FinishedGoodsAndWorkInProgress": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FinishedGoodsAndWorkInProgress", "crdr": "debit", "calculation": { "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails": { "parentTag": "ifrs-full_Inventories", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Finished goods and work in progress", "label": "Finished Goods And Work In Progress", "documentation": "Finished goods and work in progress." } } }, "auth_ref": [] }, "bti_FivePointNineThreeOnePercentageNotesDueTwoThousandAndTwentyNineMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FivePointNineThreeOnePercentageNotesDueTwoThousandAndTwentyNineMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "5.931% Notes due 2029", "label": "Five Point Nine Three One Percentage Notes Due Two Thousand And Twenty Nine [Member]", "documentation": "Five Point Nine Three One Percentage Notes Due Two Thousand And Twenty Nine" } } }, "auth_ref": [] }, "bti_FivePointSixFiveZeroPercentageNotesDueTwoThousandAndFiftyTwoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FivePointSixFiveZeroPercentageNotesDueTwoThousandAndFiftyTwoMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "5.650% Notes due 2052", "label": "Five Point Six Five Zero Percentage Notes Due Two Thousand And Fifty Two [Member]", "documentation": "Five Point Six Five Zero Percentage Notes Due Two Thousand And Fifty Two" } } }, "auth_ref": [] }, "bti_FivePointTwoEightTwoPercentageNotesDueTwoThousandAndFiftyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FivePointTwoEightTwoPercentageNotesDueTwoThousandAndFiftyMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "5.282% Notes due 2050", "label": "Five Point Two Eight Two Percentage Notes Due Two Thousand And Fifty [Member]", "documentation": "Five point two eight two percentage notes due two thousand and fifty." } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2016Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2016Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2016", "label": "Five Year Period From2016 [Member]", "documentation": "Five Year Period From 2016." } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2017Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2017", "label": "Five Year Period From2017 [Member]", "documentation": "Five Year Period From 2017." } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2018Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2018", "label": "Five Year Period From2018 [Member]", "documentation": "Five-year period from 2018." } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2019Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2019", "label": "Five Year Period From2019 [Member]", "documentation": "Five-year period from 2019." } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2024Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2024", "label": "Five Year Period From 2024 [Member]", "documentation": "Five Year Period From 2024" } } }, "auth_ref": [] }, "bti_FiveYearPeriodFrom2026Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearPeriodFrom2026Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five-year period from 2026", "label": "Five Year Period From 2026 [Member]", "documentation": "Five Year Period From 2026" } } }, "auth_ref": [] }, "bti_FiveYearTranchesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearTranchesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Five year tranches", "label": "Five Year Tranches [Member]", "documentation": "Five-year tranches." } } }, "auth_ref": [] }, "bti_FiveYearVolumeCompoundAnnualGrowthRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FiveYearVolumeCompoundAnnualGrowthRate", "presentation": [ "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Volume 5 Year CAGR", "label": "Five Year Volume Compound Annual Growth Rate", "documentation": "Five Year Volume Compound Annual Growth Rate" } } }, "auth_ref": [] }, "ifrs-full_FixedInterestRateMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FixedInterestRateMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fixed rate", "label": "Fixed interest rate [member]" } }, "en": { "role": { "documentation": "This member stands for a fixed interest rate. [Refer: Interest rate risk [member]]" } } }, "auth_ref": [ "r626" ] }, "bti_FlorenceProceedingsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FlorenceProceedingsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Florence Proceedings", "label": "Florence Proceedings [Member]", "documentation": "Florence Proceedings" } } }, "auth_ref": [] }, "bti_FloridaStateSettlementAgreementRegardingFourBrandsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FloridaStateSettlementAgreementRegardingFourBrandsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Florida State settlement agreement wrt 4 brands", "label": "Florida State Settlement Agreement Regarding Four Brands [Member]", "documentation": "Florida state settlement agreement." } } }, "auth_ref": [] }, "bti_ForecastAssumptionsAmendedPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForecastAssumptionsAmendedPeriod", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Forecast assumptions amended period", "label": "Forecast Assumptions Amended Period", "documentation": "Forecast assumptions amended period." } } }, "auth_ref": [] }, "ifrs-full_ForeignCountriesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ForeignCountriesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "All foreign countries", "label": "Foreign countries [member]" } }, "en": { "role": { "documentation": "This member stands for countries outside the entity's country of domicile. [Refer: Country of domicile [member]]" } } }, "auth_ref": [ "r341", "r342" ] }, "bti_ForeignCurrencyRiskExposureMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForeignCurrencyRiskExposureMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign currency risk exposure", "label": "Foreign Currency Risk Exposure [Member]", "documentation": "Foreign currency risk exposure." } } }, "auth_ref": [] }, "bti_ForeignCurrencyTranslationAndHedgesOfNetInvestmentsInForeignOperationsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForeignCurrencyTranslationAndHedgesOfNetInvestmentsInForeignOperationsAbstract", "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign currency translation and hedges of net investments in foreign operations", "label": "Foreign Currency Translation And Hedges Of Net Investments In Foreign Operations [Abstract]", "documentation": "Foreign Currency Translation And Hedges Of Net Investments In Foreign Operations" } } }, "auth_ref": [] }, "bti_ForeignExchangeBasisSpreadGainLossForCostOfHedging": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForeignExchangeBasisSpreadGainLossForCostOfHedging", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign exchange basis spread gain (loss) in respect of cost of hedging", "label": "Foreign Exchange Basis Spread Gain (Loss) For Cost Of Hedging", "documentation": "Foreign exchange basis spread gain for cost of hedging." } } }, "auth_ref": [] }, "ifrs-full_ForeignExchangeGain": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ForeignExchangeGain", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign exchange gain", "negatedTerseLabel": "Foreign exchange gain", "label": "Foreign exchange gain" } }, "en": { "role": { "documentation": "The gross gain arising from exchange differences recognised in profit or loss, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Foreign exchange gain (loss)]" } } }, "auth_ref": [ "r10", "r111" ] }, "bti_ForeignExchangeLossDisposalOfInterest": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForeignExchangeLossDisposalOfInterest", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Partial disposal of shares in ITC", "verboseLabel": "Foreign exchange losses on disposal of interest", "label": "Foreign Exchange Loss, Disposal of Interest", "documentation": "Foreign Exchange Loss, Disposal of Interest" } } }, "auth_ref": [] }, "bti_ForeignExchangeLossMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ForeignExchangeLossMember", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign exchange loss", "label": "Foreign Exchange Loss [Member]", "documentation": "Foreign Exchange Loss" } } }, "auth_ref": [] }, "ecd_ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ForgoneRecoveryDueToDisqualificationOfTaxBenefitsAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Forgone Recovery due to Disqualification of Tax Benefits, Amount", "terseLabel": "Forgone Recovery due to Disqualification of Tax Benefits, Amount" } } }, "auth_ref": [ "r486", "r497", "r507", "r540" ] }, "ecd_ForgoneRecoveryDueToExpenseOfEnforcementAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ForgoneRecoveryDueToExpenseOfEnforcementAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Forgone Recovery due to Expense of Enforcement, Amount", "terseLabel": "Forgone Recovery due to Expense of Enforcement, Amount" } } }, "auth_ref": [ "r486", "r497", "r507", "r540" ] }, "ecd_ForgoneRecoveryDueToViolationOfHomeCountryLawAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ForgoneRecoveryDueToViolationOfHomeCountryLawAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Forgone Recovery due to Violation of Home Country Law, Amount", "terseLabel": "Forgone Recovery due to Violation of Home Country Law, Amount" } } }, "auth_ref": [ "r486", "r497", "r507", "r540" ] }, "ecd_ForgoneRecoveryExplanationOfImpracticabilityTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ForgoneRecoveryExplanationOfImpracticabilityTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Forgone Recovery, Explanation of Impracticability [Text Block]", "terseLabel": "Forgone Recovery, Explanation of Impracticability" } } }, "auth_ref": [ "r486", "r497", "r507", "r540" ] }, "ecd_ForgoneRecoveryIndName": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "ForgoneRecoveryIndName", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Forgone Recovery, Individual Name", "terseLabel": "Name" } } }, "auth_ref": [ "r486", "r497", "r507", "r540" ] }, "ifrs-full_ForwardContractMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ForwardContractMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 forward foreign currency contracts", "label": "Forward contract [member]" } }, "en": { "role": { "documentation": "This member stands for a contract between two parties for the purchase or sale of an underlying asset at a specified future date for a settlement price determined in advance." } } }, "auth_ref": [ "r578" ] }, "bti_FourPointFiveFourZeroPercentageNotesDueTwoThousandAndFortySevenMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointFiveFourZeroPercentageNotesDueTwoThousandAndFortySevenMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.540% Notes due 2047", "label": "Four Point Five Four Zero Percentage Notes Due Two Thousand And Forty Seven [Member]", "documentation": "Four point five four zero percentage notes due two thousand and forty seven." } } }, "auth_ref": [] }, "bti_FourPointFourFourEightPercentageNotesDueTwoThousandAndTwentyEightMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointFourFourEightPercentageNotesDueTwoThousandAndTwentyEightMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.448% Notes due 2028", "label": "Four Point Four Four Eight Percentage Notes Due Two Thousand And Twenty Eight [Member]", "documentation": "Four Point Four Four Eight Percentage Notes Due Two Thousand And Twenty Eight" } } }, "auth_ref": [] }, "bti_FourPointNineZeroSixPercentageNotesDueTwoThousandAndThirtyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointNineZeroSixPercentageNotesDueTwoThousandAndThirtyMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.906% Notes due 2030", "label": "Four Point Nine Zero Six Percentage Notes Due Two Thousand And Thirty [Member]", "documentation": "Four point nine zero six percentage notes due two thousand and thirty." } } }, "auth_ref": [] }, "bti_FourPointSevenFiveEightPercentageNotesDueTwoThousandAndFortyNineMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointSevenFiveEightPercentageNotesDueTwoThousandAndFortyNineMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.758% Notes due 2049", "label": "Four Point Seven Five Eight Percentage Notes Due Two Thousand And Forty Nine [Member]", "documentation": "Four point seven five eight percentage notes due two thousand and forty nine." } } }, "auth_ref": [] }, "bti_FourPointSevenFourTwoPercentageNotesDueTwoThousandAndThirtyTwoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointSevenFourTwoPercentageNotesDueTwoThousandAndThirtyTwoMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.742% Notes due 2032", "label": "Four Point Seven Four Two Percentage Notes Due Two Thousand And Thirty Two [Member]", "documentation": "Four Point Seven Four Two Percentage Notes Due Two Thousand And Thirty Two" } } }, "auth_ref": [] }, "bti_FourPointSevenZeroZeroPercentageNotesDueTwoThousandAndTwentySevenMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointSevenZeroZeroPercentageNotesDueTwoThousandAndTwentySevenMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.700% Notes due 2027", "label": "Four Point Seven Zero Zero Percentage Notes Due Two Thousand And Twenty Seven [Member]", "documentation": "Four point seven zero zero percentage notes due two thousand and twenty seven." } } }, "auth_ref": [] }, "bti_FourPointThreeNineZeroPercentageNotesDueTwoThousandAndThirtySevenMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FourPointThreeNineZeroPercentageNotesDueTwoThousandAndThirtySevenMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "4.390% Notes due 2037", "label": "Four Point Three Nine Zero Percentage Notes Due Two Thousand And Thirty Seven [Member]", "documentation": "Four point three nine zero percentage notes due two thousand and thirty seven." } } }, "auth_ref": [] }, "bti_FoxRiverMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FoxRiverMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fox River", "label": "Fox River [Member]", "documentation": "Fox River." } } }, "auth_ref": [] }, "ecd_FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "FrValAsOfPrrYrEndOfEqtyAwrdsGrntdInPrrYrsFldVstngCondsDrngCvrdYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]", "terseLabel": "Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year" } } }, "auth_ref": [ "r520" ] }, "bti_FrankedInvestmentIncomeGroupLitigationOrderMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FrankedInvestmentIncomeGroupLitigationOrderMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest on tax payables including FIIGLO", "label": "Franked Investment Income Group Litigation Order [Member]", "documentation": "Franked Investment Income Group Litigation Order." } } }, "auth_ref": [] }, "bti_FreeholdAndLeaseholdPropertyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FreeholdAndLeaseholdPropertyMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Freehold and leasehold property", "label": "Freehold and Leasehold Property [Member]", "documentation": "Freehold and Leasehold Property" } } }, "auth_ref": [] }, "bti_FreeholdLandOrAssetsClassifiedAsHeldForSaleMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FreeholdLandOrAssetsClassifiedAsHeldForSaleMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Freehold land or assets classified as held for sale", "label": "Freehold Land Or Assets Classified As Held For Sale [Member]", "documentation": "Freehold land or assets classified as held-for-sale." } } }, "auth_ref": [] }, "bti_FreeholdPropertyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FreeholdPropertyMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Freehold property", "label": "Freehold Property [Member]", "documentation": "Freehold property." } } }, "auth_ref": [] }, "bti_FunctionalCurrencyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FunctionalCurrencyMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Functional currency", "label": "Functional Currency [Member]", "documentation": "Functional currency." } } }, "auth_ref": [] }, "bti_FundedDefinedBenefitMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FundedDefinedBenefitMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Funded Defined Benefit", "label": "Funded Defined Benefit [Member]", "documentation": "Funded defined benefit." } } }, "auth_ref": [] }, "ifrs-full_FundingArrangementsOfDefinedBenefitPlansAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FundingArrangementsOfDefinedBenefitPlansAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Funding arrangements of defined benefit plans [axis]", "label": "Funding arrangements of defined benefit plans [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r399" ] }, "ifrs-full_FundingArrangementsOfDefinedBenefitPlansDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "FundingArrangementsOfDefinedBenefitPlansDomain", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Funding arrangements of defined benefit plans [domain]", "label": "Funding arrangements of defined benefit plans [domain]" } }, "en": { "role": { "documentation": "This member stands for all defined benefit plans when disaggregated by funding arrangements of defined benefits plans. It also represents the standard value for the 'Funding arrangements of defined benefit plans' axis if no other member is used." } } }, "auth_ref": [ "r399" ] }, "bti_FurtherTwoJurisdictionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "FurtherTwoJurisdictionsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Further two jurisdictions", "label": "Further Two Jurisdictions [Member]", "documentation": "Further Two Jurisdictions" } } }, "auth_ref": [] }, "country_GB": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "GB", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United Kingdom", "verboseLabel": "United Kingdom", "label": "UNITED KINGDOM" } } }, "auth_ref": [] }, "currency_GBP": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "GBP", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "UK sterling", "terseLabel": "UK Sterling", "label": "United Kingdom, Pounds" } } }, "auth_ref": [] }, "ifrs-full_GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainLossOnChangeInFairValueOfHedgedItemUsedAsBasisForRecognisingHedgeIneffectiveness", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in fair value used for calculating hedge ineffectiveness", "label": "Gain (loss) on change in fair value of hedged item used as basis for recognising hedge ineffectiveness" } }, "en": { "role": { "documentation": "The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item." } } }, "auth_ref": [ "r298", "r299" ] }, "ifrs-full_GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainLossOnChangeInFairValueOfHedgingInstrumentUsedAsBasisForRecognisingHedgeIneffectiveness", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes in fair value used for calculating hedge ineffectiveness", "label": "Gain (loss) on change in fair value of hedging instrument used as basis for recognising hedge ineffectiveness" } }, "en": { "role": { "documentation": "The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item." } } }, "auth_ref": [ "r294" ] }, "ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Hedge ineffectiveness within operating profit", "label": "Gain (loss) on hedge ineffectiveness recognised in profit or loss" } }, "en": { "role": { "documentation": "The gain (loss) recognised in profit or loss on hedge ineffectiveness. [Refer: Gain (loss) on hedge ineffectiveness]" } } }, "auth_ref": [ "r302", "r303" ] }, "bti_GainLossOnRepurchaseOfBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GainLossOnRepurchaseOfBonds", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain (loss) on repurchase of bonds", "label": "Gain (Loss) on Repurchase of Bonds", "documentation": "Gain (Loss) on Repurchase of Bonds" } } }, "auth_ref": [] }, "bti_GainLossOnSettlementOfPlanAssetsAndLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GainLossOnSettlementOfPlanAssetsAndLiabilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain (loss) on settlement of plan assets and liabilities", "label": "Gain (Loss) On Settlement Of Plan Assets And Liabilities", "documentation": "Gain (loss) on settlement of plan assets and liabilities." } } }, "auth_ref": [] }, "ifrs-full_GainsLossesArisingFromDifferenceBetweenPreviousCarryingAmountAndFairValueOfFinancialAssetsReclassifiedAsMeasuredAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesArisingFromDifferenceBetweenPreviousCarryingAmountAndFairValueOfFinancialAssetsReclassifiedAsMeasuredAtFairValue", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Loss on reclassification from amortised cost to fair value", "label": "Gains (losses) arising from difference between previous amortised cost and fair value of financial assets reclassified out of amortised cost into fair value through profit or loss measurement category" } }, "en": { "role": { "documentation": "The gains (losses) arising from the difference between the previous amortised cost and the fair value of financial assets reclassified out of the amortised cost into the fair value through profit or loss measurement category. [Refer: At fair value [member]; Financial assets at amortised cost]" } } }, "auth_ref": [ "r50" ] }, "ifrs-full_GainsLossesArisingFromSaleAndLeasebackTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesArisingFromSaleAndLeasebackTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gains arising from sale and leaseback transactions", "label": "Gains (losses) arising from sale and leaseback transactions" } }, "en": { "role": { "documentation": "The gains (losses) arising from sale and leaseback transactions." } } }, "auth_ref": [ "r244" ] }, "ifrs-full_GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlements", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements" } }, "en": { "role": { "documentation": "The decrease (increase) in the net defined benefit liability (asset) resulting from settlements. Settlements are transactions that eliminate all further legal or constructive obligations for part or all of the benefits provided under a defined benefit plan, other than a payment of benefits to, or on behalf of, employees that is set out in the terms of the plan and included in the actuarial assumptions. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]; Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r93" ] }, "ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnCashFlowHedgesBeforeTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net fair value gains", "verboseLabel": "\u2013 net fair value gains/(losses)", "label": "Gains (losses) on cash flow hedges, before tax" } }, "en": { "role": { "documentation": "The gains (losses) recognised in other comprehensive income on cash flow hedges, before tax, before reclassification adjustments. [Refer: Cash flow hedges [member]]" } } }, "auth_ref": [ "r55" ] }, "ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnChangeInFairValueOfDerivatives", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Fair value changes on derivative financial instruments, hedged items and investments", "terseLabel": "Gains (losses) on change in fair value of derivatives", "label": "Gains (losses) on change in fair value of derivatives" } }, "en": { "role": { "documentation": "The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]" } } }, "auth_ref": [ "r585" ] }, "ifrs-full_GainsLossesOnDisposalsOfInvestments": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnDisposalsOfInvestments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Gains (losses) on disposals of investments", "label": "Gains (losses) on disposals of investments" } }, "en": { "role": { "documentation": "The gains (losses) on disposals of investments." } } }, "auth_ref": [ "r59" ] }, "ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnExchangeDifferencesOnTranslationNetOfTax", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Difference on exchange", "label": "Gains (losses) on exchange differences on translation of foreign operations, net of tax" } }, "en": { "role": { "documentation": "The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, net of tax, before reclassification adjustments. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r54" ] }, "ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Exchange differences", "label": "Foreign exchange gain (loss)" } }, "en": { "role": { "documentation": "The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Classes of financial instruments [domain]]" } } }, "auth_ref": [ "r10", "r111" ] }, "ifrs-full_GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeNetOfTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net fair value (losses)/gains", "label": "Gains (losses) on financial assets measured at fair value through other comprehensive income, net of tax" } }, "en": { "role": { "documentation": "The gains (losses) recognised in other comprehensive income on financial assets measured at fair value through other comprehensive income applying paragraph 4.1.2A of IFRS 9, net of tax, before reclassification adjustments. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income]" } } }, "auth_ref": [ "r54" ] }, "ifrs-full_GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesOnHedgesOfNetInvestmentsInForeignOperationsBeforeTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net investment hedges - net fair value gains/(losses) on derivatives", "label": "Gains (losses) on hedges of net investments in foreign operations, before tax" } }, "en": { "role": { "documentation": "The gains (losses) recognised in other comprehensive income on hedges of net investments in foreign operations, before tax, before reclassification adjustments. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r55", "r177", "r348" ] }, "ifrs-full_GainsLossesRecognisedWhenControlInSubsidiaryIsLost": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsLossesRecognisedWhenControlInSubsidiaryIsLost", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Loss/(gain) on disposal of businesses", "negatedTerseLabel": "Loss recognised when control of subsidiary is lost", "label": "Gains (losses) recognised when control of subsidiary is lost" } }, "en": { "role": { "documentation": "The gains (losses) recognised in association with the loss of control over a subsidiary, which are attributable to the former controlling interest." } } }, "auth_ref": [ "r208" ] }, "bti_GainsLossesRecognizedWhenControlOfSubsidiaryIsLostNetOfReversalOfImpairmentLossRecognizedInProfitOrLossPropertyPlantAndEquipment": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GainsLossesRecognizedWhenControlOfSubsidiaryIsLostNetOfReversalOfImpairmentLossRecognizedInProfitOrLossPropertyPlantAndEquipment", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Loss on disposal, net of impairment reversal", "negatedTerseLabel": "Gain (loss) on disposal, net of impairment reversal", "label": "Gains (Losses) Recognized When Control of Subsidiary is Lost, Net of Reversal of Impairment Loss Recognized in Profit or Loss, Property, Plant and Equipment", "documentation": "Gains (Losses) Recognized When Control of Subsidiary is Lost, Net of Reversal of Impairment Loss Recognized in Profit or Loss, Property, Plant and Equipment" } } }, "auth_ref": [] }, "ifrs-full_GainsOnDisposalsOfInvestments": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsOnDisposalsOfInvestments", "crdr": "credit", "calculation": { "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails": { "parentTag": "ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain from partial divestment of shares in ITC", "verboseLabel": "Gains on disposals of investments", "label": "Gains on disposals of investments" } }, "en": { "role": { "documentation": "The gain on the disposal of investments." } } }, "auth_ref": [ "r59" ] }, "ifrs-full_GainsOnDisposalsOfNoncurrentAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsOnDisposalsOfNoncurrentAssets", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gains on disposals of non-current assets", "label": "Gains on disposals of non-current assets" } }, "en": { "role": { "documentation": "The gain on disposals of non-current assets. [Refer: Non-current assets]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_GainsOnLitigationSettlements": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GainsOnLitigationSettlements", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gains on litigation settlements", "label": "Gains on litigation settlements" } }, "en": { "role": { "documentation": "The gain on settlements of litigation." } } }, "auth_ref": [ "r60" ] }, "ifrs-full_GeographicalAreasAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GeographicalAreasAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Geographical areas [axis]", "label": "Geographical areas [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r343", "r395", "r435", "r440" ] }, "ifrs-full_GeographicalAreasDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GeographicalAreasDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Geographical areas [domain]", "terseLabel": "Geographical areas [domain]", "label": "Geographical areas [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated geographical areas. It also represents the standard value for the 'Geographical areas' axis if no other member is used." } } }, "auth_ref": [ "r343", "r395", "r435", "r440" ] }, "bti_GloLitigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GloLitigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Glo litigation", "label": "Glo Litigation [Member]", "documentation": "Glo litigation." } } }, "auth_ref": [] }, "bti_GlobalSoftwareSolutionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GlobalSoftwareSolutionsMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Global Software Solutions", "label": "Global Software Solutions [Member]", "documentation": "Global software solutions." } } }, "auth_ref": [] }, "bti_GlobalTravelRetailMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GlobalTravelRetailMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "GTR", "label": "Global Travel Retail [Member]", "documentation": "Global travel retail." } } }, "auth_ref": [] }, "ifrs-full_Goodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Goodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Goodwill", "verboseLabel": "Carrying amount", "label": "Goodwill" } }, "en": { "role": { "documentation": "The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Total for all business combinations [member]]" } } }, "auth_ref": [ "r11", "r149", "r155", "r283" ] }, "ifrs-full_GoodwillMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GoodwillMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Goodwill", "label": "Goodwill [member]" } }, "en": { "role": { "documentation": "This member stands for goodwill. [Refer: Goodwill]" } } }, "auth_ref": [ "r405" ] }, "ifrs-full_GoodwillRecognisedAsOfAcquisitionDate": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GoodwillRecognisedAsOfAcquisitionDate", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Goodwill", "label": "Goodwill recognised as of acquisition date" } }, "en": { "role": { "documentation": "The amount recognised as of the business combination's acquisition date for goodwill. [Refer: Goodwill; Total for all business combinations [member]]" } } }, "auth_ref": [ "r442", "r443" ] }, "bti_GrizzlyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GrizzlyMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Grizzly", "label": "Grizzly [Member]", "documentation": "Grizzly" } } }, "auth_ref": [] }, "ifrs-full_GrossCarryingAmountMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "GrossCarryingAmountMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cost", "verboseLabel": "Gross carrying amount", "label": "Gross carrying amount [member]" } }, "en": { "role": { "documentation": "This member stands for the amount at which an asset is recognised before deducting any accumulated depreciation (amortisation) and accumulated impairment losses thereon. [Refer: Depreciation and amortisation expense; Impairment loss]" } } }, "auth_ref": [ "r77", "r167", "r183", "r186", "r283", "r311", "r315", "r447" ] }, "bti_GrossSettledMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GrossSettledMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gross Settled", "label": "Gross Settled [Member]", "documentation": "Gross settled." } } }, "auth_ref": [] }, "bti_GroupOfCountriesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GroupOfCountriesMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canada, the Netherlands and Switzerland", "label": "Group Of Countries [Member]", "documentation": "Canada, the Netherlands and Switzerland." } } }, "auth_ref": [] }, "bti_GroupsAssociatesAndJointVenturesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GroupsAssociatesAndJointVenturesMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associates and Joint Ventures", "label": "Groups Associates and Joint Ventures [Member]", "documentation": "Group's Associates and Joint Ventures" } } }, "auth_ref": [] }, "bti_GroupsGroningenFactoryPlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GroupsGroningenFactoryPlanMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Group\u2019s Groningen Factory Plan", "label": "Group\u2019s Groningen Factory Plan [Member]", "documentation": "Group\u2019s Groningen Factory Plan" } } }, "auth_ref": [] }, "bti_GroupsShareInAssociatesAndJointVenturesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GroupsShareInAssociatesAndJointVenturesMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Groups Share in Associates and Joint Ventures", "label": "Groups Share In Associates And Joint Ventures [Member]", "documentation": "Groups share in associates and joint ventures." } } }, "auth_ref": [] }, "bti_GrowersClassActionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "GrowersClassActionMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Growers class action", "label": "Growers Class Action [Member]", "documentation": "Growers class action." } } }, "auth_ref": [] }, "bti_HeadlineEarningBasicGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningBasicGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Gain on partial disposal of an associate and associated capital gains tax, including foreign exchange recycled", "label": "Headline Earning Basic, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled", "documentation": "Headline Earning Basic, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled" } } }, "auth_ref": [] }, "bti_HeadlineEarningDilutedGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningDilutedGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": -1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Gain on partial disposal of an associate and associated capital gains tax, including foreign exchange recycled", "label": "Headline Earning Diluted, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled", "documentation": "Headline Earning Diluted, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled" } } }, "auth_ref": [] }, "bti_HeadlineEarningPerShareBasicGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningPerShareBasicGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain on partial disposal of an associate and associated capital gains tax, including foreign exchange recycled (in GBP per share)", "label": "Headline Earning Per Share Basic, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled", "documentation": "Headline Earning Per Share Basic, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled" } } }, "auth_ref": [] }, "bti_HeadlineEarningPerShareDilutedGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningPerShareDilutedGainOnPartialDisposalOfAssociatesAndAssociatedCapitalGainsTaxIncludingForeignExchangeRecycled", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain on partial disposal of an associate and associated capital gains tax, including foreign exchange recycled (in GBP per share)", "label": "Headline Earning Per Share Diluted, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled", "documentation": "Headline Earning Per Share Diluted, Gain On Partial Disposal Of Associates And Associated Capital Gains Tax, Including Foreign Exchange Recycled" } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Headline earnings per share (basic)", "label": "Headline Earnings Basic", "documentation": "Headline earnings basic." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of foreign exchange reclassification from reserves to the income statement", "label": "Headline Earnings Basic Effect Of Foreign Exchange Reclassification From Reserves To Income Statement", "documentation": "Headline earnings basic effect of foreign exchange reclassification from reserves to income statement." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of intangibles, property, plant and equipment, associates and assets held-for-sale", "label": "Headline Earnings Basic Effect Of Impairment Of Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline earnings basic effect of impairment of intangibles property plant and equipment and assets held for sale." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicEffectOfImpairmentOfSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicEffectOfImpairmentOfSubsidiaries", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of subsidiaries transferred to held-for-sale and associated costs", "label": "Headline Earnings Basic Effect Of Impairment Of Subsidiaries", "documentation": "Headline earnings basic effect of impairment of subsidiaries." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": -1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Effect of gains on disposal of property, plant and equipment, trademarks, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback", "label": "Headline Earnings Basic Effect Of Losses Gains On Disposal Of Property Plant And Equipment Trademarks Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings basic effect of losses/(gains) on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicIssueOfSharesAndChangeInShareholdingInAssociate": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicIssueOfSharesAndChangeInShareholdingInAssociate", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": -1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Issue of shares and change in shareholding of an associate", "label": "Headline Earnings Basic Issue Of Shares And Change In Shareholding In Associate", "documentation": "Headline earnings basic issue of shares and change in shareholding in associate." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback", "label": "Headline Earnings Basic Tax And Non Controlling Interests On Disposal Of Property Plant And Equipment Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings basic tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": -1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax and non-controlling interests on intangibles, property, plant and equipment, associates and assets held-for-sale", "label": "Headline Earnings Basic Tax And Noncontrolling Interests On Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline\u200b earnings \u200bbasic tax\u200b and\u200b noncontrolling \u200binterests\u200b on impairment\u200b of intangibles\u200b and \u200bproperty \u200bplant and \u200bequipment." } } }, "auth_ref": [] }, "bti_HeadlineEarningsBasicTaxEffectOnImpairmentOfSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsBasicTaxEffectOnImpairmentOfSubsidiaries", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax on impairment of subsidiaries and associated costs", "label": "Headline Earnings Basic Tax Effect On Impairment Of Subsidiaries", "documentation": "Headline Earnings Basic Tax Effect On Impairment Of Subsidiaries" } } }, "auth_ref": [] }, "bti_HeadlineEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Headline earnings per share (diluted)", "label": "Headline Earnings Diluted", "documentation": "Headline\u200b earnings \u200bdiluted." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of foreign exchange reclassification from reserves to the income statement", "label": "Headline Earnings Diluted Effect Of Foreign Exchange Reclassification From Reserves To Income Statement", "documentation": "Headline earnings diluted effect of foreign exchange reclassification from reserves to income statement." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAndAssociatesAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAndAssociatesAssetsHeldForSale", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of intangibles, property, plant and equipment, associates and assets held-for-sale", "label": "Headline Earnings Diluted Effect Of Impairment Of Intangibles Property Plant And Equipment And Associates Assets Held For Sale", "documentation": "Headline earnings diluted effect of impairment of intangibles property plant and equipment and assets held for sale." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedEffectOfImpairmentOfSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedEffectOfImpairmentOfSubsidiaries", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of subsidiaries transferred to held-for-sale and associated costs", "label": "Headline Earnings Diluted Effect Of Impairment Of Subsidiaries", "documentation": "Headline earnings diluted effect of impairment of subsidiaries." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": -1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Effect of gains on disposal of property, plant and equipment, trademarks, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback", "label": "Headline Earnings Diluted Effect Of Losses Gains On Disposal Of Property Plant And Equipment Trademarks Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings diluted Effect of losses/(gains) on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedIssueOfSharesAndChangeInShareHoldingInAssociate": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedIssueOfSharesAndChangeInShareHoldingInAssociate", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": -1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Issue of shares and change in shareholding of an associate", "label": "Headline Earnings Diluted Issue Of Shares And Change In Share Holding In Associate", "documentation": "Headline earnings diluted issue of shares and change in share holding in associate." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback", "label": "Headline Earnings Diluted Tax And Non Controlling Interests On Disposal Of Property Plant And Equipment Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings diluted tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax and non-controlling interests on intangibles, property, plant and equipment, associates and assets held-for-sale", "label": "Headline Earnings Diluted Tax And Noncontrolling Interests On Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline\u200b earnings \u200bdiluted tax\u200b and\u200b noncontrolling\u200b interests\u200b on impairment \u200bof intangibles\u200b and\u200b property \u200bplant\u200b and\u200b equipment." } } }, "auth_ref": [] }, "bti_HeadlineEarningsDilutedTaxEffectOnImpairmentOfSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsDilutedTaxEffectOnImpairmentOfSubsidiaries", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": -1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax on impairment of subsidiaries and associated costs", "label": "Headline Earnings Diluted Tax Effect On Impairment Of Subsidiaries", "documentation": "Headline Earnings Diluted Tax Effect On Impairment Of Subsidiaries" } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Headline earnings per share (basic) (in GBP per share)", "label": "Headline Earnings Per Share Basic", "documentation": "Headline earnings per share basic." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of foreign exchange reclassification from reserves to the income statement (in GBP per share)", "label": "Headline Earnings Per Share Basic Effect Of Foreign Exchange Reclassification From Reserves To Income Statement", "documentation": "Headline earnings per share basic effect of foreign exchange reclassification from reserves to income statement." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of intangibles, property, plant and equipment, and assets held for sale (in GBP per share)", "label": "Headline Earnings Per Share Basic Effect Of Impairment Of Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline earnings per share basic effect of impairment of intangibles property plant and equipment and assets held for sale." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicEffectOfImpairmentOfSubsidiaries": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicEffectOfImpairmentOfSubsidiaries", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of subsidiaries (in GBP per share)", "label": "Headline Earnings Per Share Basic Effect Of Impairment Of Subsidiaries", "documentation": "Headline earnings per share basic effect of impairment of subsidiaries." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicEffectOfLossesGainsOnDisposalOfPropertyPlantAndEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of (gains)/losses on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback (in GBP per share)", "label": "Headline Earnings Per Share Basic Effect Of Losses Gains On Disposal Of Property Plant And Equipment Trademarks Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings per share basic effect of losses/(gains) on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicIssueOfSharesAndChangeInShareholdingInAssociate": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicIssueOfSharesAndChangeInShareholdingInAssociate", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Issue of shares and change in shareholding in associate per share (in GBP per share)", "label": "Headline Earnings Per Share Basic Issue Of Shares And Change In Shareholding In Associate", "documentation": "Headline earnings per share basic issue of shares and change in shareholding in associate." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicTaxAndNonControllingInterestsOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback (in GBP per share)", "label": "Headline Earnings Per Share Basic Tax And Non Controlling Interests On Disposal Of Property Plant And Equipment Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings per share basic tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicTaxAndNoncontrollingInterestsOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicTaxAndNoncontrollingInterestsOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on impairment of intangibles, and property, plant and equipment per share (in GBP per share)", "label": "Headline Earnings Per Share Basic Tax And Noncontrolling Interests Of Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline\u200b earnings\u200b per \u200bshare \u200bbasic\u200b tax\u200b and\u200b noncontrolling\u200b interests\u200b on impairment\u200b of intangibles\u200b and \u200bproperty\u200b plant\u200b and\u200b equipment." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareBasicTaxEffectOnImpairmentOfSubsidiaries": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareBasicTaxEffectOnImpairmentOfSubsidiaries", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareBasic", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on impairment of subsidiaries (in GBP per share)", "label": "Headline Earnings Per Share Basic Tax Effect On Impairment Of Subsidiaries", "documentation": "Headline Earnings Per Share Basic Tax Effect On Impairment Of Subsidiaries" } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Headline earnings per share (diluted) (in GBP per share)", "label": "Headline Earnings Per Share Diluted", "documentation": "Headline earnings per share diluted." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedEffectOfForeignExchangeReclassificationFromReservesToIncomeStatement", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of foreign exchange reclassification from reserves to the income statement (in GBP per share)", "label": "Headline Earnings Per Share Diluted Effect Of Foreign Exchange Reclassification From Reserves To Income Statement", "documentation": "Headline \u200bearnings per share diluted effect\u200b of foreign \u200bexchange\u200b reclassification\u200b from\u200b reserves \u200bto income statement." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedEffectOfImpairmentOfIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment of intangibles, property, plant and equipment, and assets held for sale per share (in GBP per share)", "label": "Headline Earnings Per Share Diluted Effect Of Impairment Of Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline earnings per share diluted effect of impairment of intangibles property plant and equipment and assets held for sale." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedEffectOfImpairmentOfSubsidiaries": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedEffectOfImpairmentOfSubsidiaries", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Effect of impairment in subsidiaries (in GBP per share)", "label": "Headline Earnings Per Share Diluted Effect Of Impairment Of Subsidiaries", "documentation": "Headline earnings per share diluted effect of impairment of subsidiaries." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedEffectOfLossesGainsOnDisposalOfPropertyPlantEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedEffectOfLossesGainsOnDisposalOfPropertyPlantEquipmentTrademarksHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Effect of (gains)/losses on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback (in GBP per share)", "label": "Headline Earnings Per Share Diluted Effect Of Losses Gains On Disposal Of Property Plant & Equipment Trademarks Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings per share diluted effect of losses/(gains) on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedIssueOfSharesAndChangeInShareholdingInAssociate": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedIssueOfSharesAndChangeInShareholdingInAssociate", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Issue of shares and change in shareholding in associate (in GBP per share)", "label": "Headline Earnings Per Share Diluted Issue Of Shares And Change In Shareholding In Associate", "documentation": "Headline earnings per share diluted issue of shares and change in shareholding in associate." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedTaxAndNCIOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedTaxAndNCIOnDisposalOfPropertyPlantAndEquipmentHeldForSaleAssetsPartialFullTerminationOfIFRS16LeasesAndSaleAndLeaseback", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback (in GBP per share)", "label": "Headline Earnings Per Share Diluted Tax And N C I On Disposal Of Property Plant And Equipment Held For Sale Assets Partial Full Termination Of I F R S16 Leases And Sale And Leaseback", "documentation": "Headline earnings per share diluted tax and non-controlling interests on disposal of property, plant and equipment, held-for-sale assets, partial/full termination of IFRS 16 leases, and sale and leaseback." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedTaxAndNoncontrollingInterestsOnIntangiblesPropertyPlantAndEquipmentAssociatesAndAssetsHeldForSale", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Tax and non-controlling interests on impairment of intangibles, and property, plant and equipment per share (in GBP per share)", "label": "Headline Earnings Per Share Diluted Tax And Noncontrolling Interests On Intangibles Property Plant And Equipment Associates And Assets Held For Sale", "documentation": "Headline\u200b earnings\u200b per\u200b share\u200b diluted tax\u200b and\u200b noncontrolling\u200b interests\u200b on impairment\u200b of intangibles\u200b and\u200b property\u200b plant \u200band\u200b equipment." } } }, "auth_ref": [] }, "bti_HeadlineEarningsPerShareDilutedTaxEffectOnImpairmentOfSubsidiaries": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeadlineEarningsPerShareDilutedTaxEffectOnImpairmentOfSubsidiaries", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsPerShareDiluted", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on impairment of subsidiaries (in GBP per share)", "label": "Headline Earnings Per Share Diluted Tax Effect On Impairment Of Subsidiaries", "documentation": "Headline Earnings Per Share Diluted Tax Effect On Impairment Of Subsidiaries" } } }, "auth_ref": [] }, "bti_HearingPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HearingPeriod", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hearing period", "label": "Hearing Period", "documentation": "Hearing period." } } }, "auth_ref": [] }, "ifrs-full_HedgesOfNetInvestmentInForeignOperationsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "HedgesOfNetInvestmentInForeignOperationsMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net investment hedges", "label": "Hedges of net investment in foreign operations [member]" } }, "en": { "role": { "documentation": "This member stands for hedges of the entity's monetary items that are receivable from or payable to a foreign operation, for which settlement is neither planned nor likely to occur in the foreseeable future. A foreign operation is an entity that is a subsidiary, associate, joint venture or branch of a reporting entity, the activities of which are based or conducted in a country or currency other than those of the reporting entity." } } }, "auth_ref": [ "r180", "r296", "r301", "r304" ] }, "ifrs-full_HedgesOfNetInvestmentsInForeignOperationsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "HedgesOfNetInvestmentsInForeignOperationsAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "label": "Hedges of net investment in foreign operations [abstract]" } } }, "auth_ref": [] }, "ifrs-full_HedgingInstrumentsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "HedgingInstrumentsDomain", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hedging Instrument", "label": "Hedging instruments [domain]" } }, "en": { "role": { "documentation": "This member stands for hedging instruments. A hedging instrument can be a designated: (a) derivative measured at fair value through profit or loss, except for some written options (see paragraph B6.2.4 of IFRS 9); (b) non-derivative financial asset or non-derivative financial liability measured at fair value through profit or loss, unless it is a financial liability designated as at fair value through profit or loss for which the amount of its change in fair value that is attributable to changes in the credit risk of that liability is presented in other comprehensive income in accordance with paragraph 5.7.7 of IFRS 9. For a hedge of foreign currency risk, the foreign currency risk component of a non-derivative financial asset or a non-derivative financial liability may be designated as a hedging instrument provided that it is not an investment in an equity instrument for which an entity has elected to present changes in fair value in other comprehensive income in accordance with paragraph 5.7.5 of IFRS 9. This member also represents the standard value for the 'Hedging instruments' axis if no other member is used." } } }, "auth_ref": [ "r291", "r296" ] }, "bti_HedgingReserveReleaseGainLossRecognizedInFinanceIncomeCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HedgingReserveReleaseGainLossRecognizedInFinanceIncomeCost", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain (loss) reported in net finance costs", "label": "Hedging Reserve Release Gain (Loss) Recognized In Finance Income Cost", "documentation": "Hedging reserve release gain loss recognized in finance income cost." } } }, "auth_ref": [] }, "bti_HedgingReserveReleaseGainLossRecognizedInOtherOperatingIncomeExpense": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HedgingReserveReleaseGainLossRecognizedInOtherOperatingIncomeExpense", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain (loss) reported in operating expenses", "label": "Hedging Reserve Release Gain (Loss) Recognized In Other Operating Income Expense", "documentation": "Hedging \u200breserve\u200b release \u200bgain\u200b loss\u200b recognized \u200bin other operating income expense." } } }, "auth_ref": [] }, "bti_HedgingReserveReleaseGainLossRecognizedInRawMaterialsAndConsumables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HedgingReserveReleaseGainLossRecognizedInRawMaterialsAndConsumables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Gain (loss) reported in raw materials and consumables", "label": "Hedging Reserve Release Gain (Loss) Recognized In Raw Materials And Consumables", "documentation": "Hedging reserve release gain (loss) recognized in raw materials and consumables." } } }, "auth_ref": [] }, "bti_HedgingReserveReleaseGainLossRecognizedWithinRevenueChargedToIncomeStatement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HedgingReserveReleaseGainLossRecognizedWithinRevenueChargedToIncomeStatement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Hedging reserve release gain (loss) recognized within revenue charged to income statement", "label": "Hedging Reserve Release Gain (Loss) Recognized Within Revenue Charged To Income Statement", "documentation": "Hedging reserve release gain (loss) recognized within revenue charged to income statement." } } }, "auth_ref": [] }, "bti_HeldForTradingMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeldForTradingMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Held-for-trading", "label": "Held For Trading [Member]", "documentation": "Held for trading." } } }, "auth_ref": [] }, "bti_HeldInEmployeeShareOwnershipTrustsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeldInEmployeeShareOwnershipTrustsMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "held in employee share \u2028ownership trusts", "label": "Held In Employee Share Ownership Trusts [Member]", "documentation": "Held in employee share ownership trusts." } } }, "auth_ref": [] }, "bti_HeldInTreasuryMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HeldInTreasuryMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Held in treasury", "label": "Held In Treasury [Member]", "documentation": "Held In Treasury" } } }, "auth_ref": [] }, "bti_HighestProportionOfCentrallyManagedDebtMaturingInASingleRollingYear": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HighestProportionOfCentrallyManagedDebtMaturingInASingleRollingYear", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Peak maturity of centrally managed debt maturing in a rolling 12-month period", "label": "Highest Proportion Of Centrally Managed Debt Maturing In A Single Rolling Year", "documentation": "Highest proportion of centrally managed debt maturing in a single rolling year." } } }, "auth_ref": [] }, "bti_HrvatskiDuhaniDDTobaccoLeafProcessingMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HrvatskiDuhaniDDTobaccoLeafProcessingMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hrvatski Duhani D D Tobacco Leaf Processing", "label": "Hrvatski Duhani D D Tobacco Leaf Processing [Member]", "documentation": "Hrvatski Duhani d.d. Tobacco Leaf Processing." } } }, "auth_ref": [] }, "bti_HybridBondAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HybridBondAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hybrid Bond [Axis]", "label": "Hybrid Bond [Axis]", "documentation": "Hybrid bond." } } }, "auth_ref": [] }, "bti_HybridBondDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "HybridBondDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hybrid Bond [Domain]", "label": "Hybrid Bond [Domain]", "documentation": "Hybrid Bond [Domain]" } } }, "auth_ref": [] }, "stpr_IA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "IA", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Iowa", "label": "IOWA" } } }, "auth_ref": [] }, "country_ID": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "ID", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Indonesia", "label": "INDONESIA" } } }, "auth_ref": [] }, "stpr_ID": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "ID", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Idaho", "label": "IDAHO" } } }, "auth_ref": [] }, "country_IE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "IE", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ireland", "label": "IRELAND" } } }, "auth_ref": [] }, "stpr_IL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "IL", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Illinois", "label": "ILLINOIS" } } }, "auth_ref": [] }, "currency_IRR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "IRR", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Iran", "label": "Iran, Rials" } } }, "auth_ref": [] }, "country_IT": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "IT", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Italy", "label": "ITALY" } } }, "auth_ref": [] }, "bti_ITCHotelsLimitedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ITCHotelsLimitedMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "ITC Hotels Limited", "label": "ITC Hotels Limited [Member]", "documentation": "ITC Hotels Limited" } } }, "auth_ref": [] }, "bti_ITCLtdMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ITCLtdMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "ITC Ltd.", "label": "ITC Ltd [Member]", "documentation": "ITC Ltd." } } }, "auth_ref": [] }, "dei_IcfrAuditorAttestationFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "IcfrAuditorAttestationFlag", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "ICFR Auditor Attestation Flag", "label": "ICFR Auditor Attestation Flag" } } }, "auth_ref": [ "r465", "r466", "r489" ] }, "bti_ImascoPensionFundSocietyPlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImascoPensionFundSocietyPlanMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Imasco Pension Fund Society Plan", "label": "Imasco Pension Fund Society Plan [Member]", "documentation": "Imasco Pension Fund Society Plan." } } }, "auth_ref": [] }, "bti_ImpactOfDilutionPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImpactOfDilutionPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 28.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impact of dilution (in GBP pence per share)", "label": "Impact Of Dilution Per Share Diluted", "documentation": "Impact Of Dilution Per Share Diluted" } } }, "auth_ref": [] }, "bti_ImpairmentAndRepairCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImpairmentAndRepairCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment and repair costs", "label": "Impairment and Repair Costs", "documentation": "Impairment and Repair Costs" } } }, "auth_ref": [] }, "bti_ImpairmentChargesAndAssociatedCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImpairmentChargesAndAssociatedCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment charges and associated costs", "label": "Impairment Charges And Associated Costs", "documentation": "Impairment charges and associated costs." } } }, "auth_ref": [] }, "ifrs-full_ImpairmentLossRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ImpairmentLossRecognisedInProfitOrLoss", "crdr": "debit", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Impairment loss recognised in profit or loss", "terseLabel": "Provided in the year", "label": "Impairment loss recognised in profit or loss" } }, "en": { "role": { "documentation": "The amount of impairment loss recognised in profit or loss. [Refer: Impairment loss; Profit (loss)]" } } }, "auth_ref": [ "r141", "r144" ] }, "ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ImpairmentLossRecognisedInProfitOrLossGoodwill", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment of goodwill", "label": "Impairment loss recognised in profit or loss, goodwill" } }, "en": { "role": { "documentation": "The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]" } } }, "auth_ref": [ "r282" ] }, "ifrs-full_ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ImpairmentLossRecognisedInProfitOrLossIntangibleAssetsAndGoodwill", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Impairment", "terseLabel": "Impairment", "label": "Impairment loss recognised in profit or loss, intangible assets and goodwill" } }, "en": { "role": { "documentation": "The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]" } } }, "auth_ref": [ "r611" ] }, "bti_ImpairmentLossRecognisedInProfitOrLossNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImpairmentLossRecognisedInProfitOrLossNetOfTax", "crdr": "credit", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment loss, net of tax", "label": "Impairment Loss Recognised In Profit Or Loss, Net Of Tax", "documentation": "Impairment Loss Recognised In Profit Or Loss, Net Of Tax" } } }, "auth_ref": [] }, "ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impairment of property, plant and equipment", "label": "Impairment loss recognised in profit or loss, property, plant and equipment" } }, "en": { "role": { "documentation": "The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]" } } }, "auth_ref": [ "r58", "r79" ] }, "ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipmentIncludingRightofuseAssets", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Impairment", "label": "Impairment loss recognised in profit or loss, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The amount of impairment loss recognised in profit or loss for property, plant and equipment including right-of-use assets. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "bti_ImpairmentTestingCurrentHeadroom": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImpairmentTestingCurrentHeadroom", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Current headroom", "label": "Impairment Testing, Current Headroom", "documentation": "Impairment Testing, Current Headroom" } } }, "auth_ref": [] }, "bti_ImperialTobaccoCanadaLimitedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImperialTobaccoCanadaLimitedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Imperial Tobacco Canada Limited", "label": "Imperial Tobacco Canada Limited [Member]", "documentation": "Imperial Tobacco Canada Limited." } } }, "auth_ref": [] }, "bti_ImperialTobaccoCanadaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImperialTobaccoCanadaMember", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Imperial Tobacco Canada", "label": "Imperial Tobacco Canada [Member]", "documentation": "Imperial Tobacco Canada." } } }, "auth_ref": [] }, "bti_ImperialTobaccoCorporatePensionPlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImperialTobaccoCorporatePensionPlanMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Imperial Tobacco Corporate Pension Plan", "label": "Imperial Tobacco Corporate Pension Plan [Member]", "documentation": "Imperial Tobacco Corporate Pension Plan" } } }, "auth_ref": [] }, "bti_ImperialTobaccoGroupPLCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ImperialTobaccoGroupPLCMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Imperial Tobacco Group PLC", "label": "Imperial Tobacco Group P L C [Member]", "documentation": "Imperial Tobacco Group PLC." } } }, "auth_ref": [] }, "ifrs-full_IncomeStatementAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeStatementAbstract", "lang": { "en-us": { "role": { "label": "Profit or loss [abstract]" } } }, "auth_ref": [] }, "bti_IncomeTaxDisclosureLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncomeTaxDisclosureLineItems", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Income Tax Disclosure [Line Items]", "label": "Income Tax Disclosure [Line Items]", "documentation": "Income tax disclosure [Line Items]." } } }, "auth_ref": [] }, "bti_IncomeTaxDisclosureTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncomeTaxDisclosureTable", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Income Tax Disclosure [Table]", "label": "Income Tax Disclosure [Table]", "documentation": "Income tax disclosure [Table]." } } }, "auth_ref": [] }, "ifrs-full_IncomeTaxExpenseContinuingOperations": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxExpenseContinuingOperations", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": -1.0, "order": 2.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": -1.0, "order": 3.0 }, "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Taxation on ordinary activities", "terseLabel": "Taxation on ordinary activities", "negatedLabel": "Taxation on ordinary activities", "totalLabel": "Taxation on ordinary activities", "label": "Tax expense (income)" } }, "en": { "role": { "documentation": "The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]" } } }, "auth_ref": [ "r51", "r63", "r65", "r66", "r128", "r225", "r332" ] }, "ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": -1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "\u2013 tax on net fair value gains in respect of cash flow hedges", "label": "Income tax relating to cash flow hedges included in other comprehensive income" } }, "en": { "role": { "documentation": "The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]" } } }, "auth_ref": [ "r53", "r64" ] }, "ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "\u2013 tax on net fair value (gains)/losses in respect of cash flow hedges", "label": "Income tax relating to components of other comprehensive income that will be reclassified to profit or loss" } }, "en": { "role": { "documentation": "The amount of income tax relating to amounts recognised in other comprehensive income that will be reclassified to profit or loss. [Refer: Income tax relating to components of other comprehensive income]" } } }, "auth_ref": [ "r56" ] }, "ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "\u2013 tax on actuarial gains (losses) in respect of subsidiaries", "label": "Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss" } }, "en": { "role": { "documentation": "The amount of income tax relating to amounts recognised in other comprehensive income that will not be reclassified to profit or loss. [Refer: Income tax relating to components of other comprehensive income]" } } }, "auth_ref": [ "r56" ] }, "ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "\u2013 tax on actuarial losses/(gains) in respect of subsidiaries", "label": "Income tax relating to remeasurements of defined benefit plans included in other comprehensive income" } }, "en": { "role": { "documentation": "The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [domain]]" } } }, "auth_ref": [ "r53", "r64" ] }, "ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncomeTaxesPaidClassifiedAsOperatingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperatingActivities", "weight": -1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Tax paid", "label": "Income taxes paid, classified as operating activities" } }, "en": { "role": { "documentation": "The cash outflow for income taxes paid, classified as operating activities." } } }, "auth_ref": [ "r622" ] }, "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseInCashAndCashEquivalents", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Increase in net cash and cash equivalents in the year", "label": "Increase (decrease) in cash and cash equivalents after effect of exchange rate changes" } }, "en": { "role": { "documentation": "The increase (decrease) in cash and cash equivalents after the effect of exchange rate changes on cash and cash equivalents held in foreign currencies. [Refer: Cash and cash equivalents; Effect of exchange rate changes on cash and cash equivalents]" } } }, "auth_ref": [ "r198" ] }, "ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "totalLabel": "Net cash flows generated from operating, investing and financing activities", "label": "Increase (decrease) in cash and cash equivalents before effect of exchange rate changes" } }, "en": { "role": { "documentation": "The increase (decrease) in cash and cash equivalents before the effect of exchange rate changes on cash and cash equivalents held in foreign currencies. [Refer: Cash and cash equivalents; Effect of exchange rate changes on cash and cash equivalents]" } } }, "auth_ref": [ "r198" ] }, "ifrs-full_IncreaseDecreaseInContingentConsiderationAssetLiability": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseInContingentConsiderationAssetLiability", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Decrease in contingent consideration asset (liability)", "label": "Increase (decrease) in contingent consideration asset (liability)" } }, "en": { "role": { "documentation": "The increase (decrease) in a contingent consideration asset (liability) relating to a business combination." } } }, "auth_ref": [ "r280" ] }, "ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumption", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Decrease of actuarial assumption", "terseLabel": "1 year decrease", "label": "Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption" } }, "en": { "role": { "documentation": "The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r98" ] }, "ifrs-full_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumption", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Increase of actuarial assumption", "terseLabel": "1 year increase", "label": "Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption" } }, "en": { "role": { "documentation": "The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r98" ] }, "bti_IncreaseDecreaseInNumberOfCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInNumberOfCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Change in Number Increase/(decrease)", "label": "Increase Decrease In Number Of Cases", "documentation": "Increase (decrease) in number of cases." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInNumberOfPlaintiffsInCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInNumberOfPlaintiffsInCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Change in Number Increase / (Decrease)", "label": "Increase Decrease In Number Of Plaintiffs In Cases", "documentation": "Increase decrease in number of plaintiffs in cases." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInOtherComprehensiveIncomeOnBasisOfStrengtheningOfFunctionalCurrenciesAgainstNonFunctionalCurrency": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInOtherComprehensiveIncomeOnBasisOfStrengtheningOfFunctionalCurrenciesAgainstNonFunctionalCurrency", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impact of 10% strengthening of functional currencies against non-functional currencies on items recognised directly in other comprehensive income", "label": "Increase Decrease In Other Comprehensive Income On Basis Of Strengthening Of Functional Currencies Against Non Functional Currency", "documentation": "Increase decrease in other comprehensive income on basis of strengthening of functional currencies against non functional currency." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInOtherComprehensiveIncomeOnBasisOfWeakeningOfFunctionalCurrenciesAgainstNonFunctionalCurrency": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInOtherComprehensiveIncomeOnBasisOfWeakeningOfFunctionalCurrenciesAgainstNonFunctionalCurrency", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Impact of 10% weakening of functional currencies against non-functional currencies on items recognised directly in other comprehensive incomee", "label": "Increase Decrease In Other Comprehensive Income On Basis Of Weakening Of Functional Currencies Against Non Functional Currency", "documentation": "Increase decrease in other comprehensive income on basis of weakening of functional currencies against non functional currency." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInProfitLossBeforeTaxOnBasisOfStrengtheningOfFunctionalCurrenciesAgainstNonFunctionalCurrency": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInProfitLossBeforeTaxOnBasisOfStrengtheningOfFunctionalCurrenciesAgainstNonFunctionalCurrency", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Impact of 10% strengthening of functional currencies against non-functional currencies on pre-tax profit", "label": "Increase Decrease In Profit Loss Before Tax On Basis Of Strengthening Of Functional Currencies Against Non Functional Currency", "documentation": "Increase decrease in profit loss before tax on basis of strengthening of functional currencies against non functional currency." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInProfitLossBeforeTaxOnBasisOfWeakeningOfFunctionalCurrenciesAgainstNonFunctionalCurrency": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInProfitLossBeforeTaxOnBasisOfWeakeningOfFunctionalCurrenciesAgainstNonFunctionalCurrency", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impact of 10% weakening of functional currencies against non-functional currencies on pre-tax profit", "label": "Increase Decrease In Profit Loss Before Tax On Basis Of Weakening Of Functional Currencies Against Non Functional Currency", "documentation": "Increase decrease in profit loss before tax on basis of weakening of functional currencies against non functional currency." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInProvisionIfPricingPlansChangeProvisionCalculation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInProvisionIfPricingPlansChangeProvisionCalculation", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase (decrease) in provision if pricing plans change, provision calculation", "label": "Increase (Decrease) In Provision If Pricing Plans Change, Provision Calculation", "documentation": "Increase (Decrease) In Provision If Pricing Plans Change, Provision Calculation" } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInProvisionIfVolumeDecreasesProvisionCalculation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInProvisionIfVolumeDecreasesProvisionCalculation", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase (decrease) in provision if volume decreases, provision calculation", "label": "Increase (Decrease) In Provision If Volume Decreases, Provision Calculation", "documentation": "Increase (Decrease) In Provision If Volume Decreases, Provision Calculation" } } }, "auth_ref": [] }, "bti_IncreaseDecreaseInTransfersToHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseInTransfersToHeldForSale", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_IncreaseDecreaseInCashAndCashEquivalents", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Transferred from/(to) held-for-sale", "label": "Increase (Decrease) In Transfers To Held For Sale", "documentation": "Increase (Decrease) In Transfers To Held For Sale" } } }, "auth_ref": [] }, "bti_IncreaseDecreaseReclassificationOfEquityRelatedToAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseReclassificationOfEquityRelatedToAssetsHeldForSale", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reclassification of equity related to assets held-for-sale", "label": "Increase (Decrease) Reclassification Of Equity Related To Assets Held-For-Sale", "documentation": "Increase (Decrease) Reclassification Of Equity Related To Assets Held-For-Sale" } } }, "auth_ref": [] }, "ifrs-full_IncreaseDecreaseThroughChangeInEquityOfSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughChangeInEquityOfSubsidiaries", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Non-controlling interests \u2013 acquisitions", "label": "Increase (decrease) through change in equity of subsidiaries, equity" } }, "en": { "role": { "documentation": "The increase (decrease) in the entity's equity resulting from the change in the equity of subsidiaries. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r576" ] }, "ifrs-full_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "negatedLabel": "Differences on exchange", "label": "Increase (decrease) in net defined benefit liability (asset) resulting from changes in foreign exchange rates, net defined benefit liability (asset)" } }, "en": { "role": { "documentation": "The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r94" ] }, "bti_IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAssetUnrecognisedFundedSchemeSurpluses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughChangesInForeignExchangeRatesNetDefinedBenefitLiabilityAssetUnrecognisedFundedSchemeSurpluses", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Differences \u2028on exchange", "label": "Increase (Decrease) Through Changes In Foreign Exchange Rates Net Defined Benefit Liability Asset Unrecognised Funded Scheme Surpluses", "documentation": "Increase decrease through changes in foreign exchange rates net defined benefit liability asset unrecognised funded scheme surpluses." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseThroughCouponPaidOnPerpetualHybridBondsEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughCouponPaidOnPerpetualHybridBondsEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "coupons paid", "label": "Increase (Decrease) Through Coupon Paid On Perpetual Hybrid Bonds, Equity", "documentation": "Increase (decrease) through coupon paid on perpetual hybrid bonds." } } }, "auth_ref": [] }, "ifrs-full_IncreaseDecreaseThroughExerciseOfOptions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughExerciseOfOptions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "proceeds from new \u2028shares issued", "verboseLabel": "Changes during the year - share option schemes", "label": "Increase (decrease) through exercise of options, equity" } }, "en": { "role": { "documentation": "The increase (decrease) in equity resulting from the exercise of options." } } }, "auth_ref": [ "r576" ] }, "ifrs-full_IncreaseDecreaseThroughForeignExchangeFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughForeignExchangeFinancialAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Differences on exchange", "label": "Increase (decrease) through foreign exchange, financial assets" } }, "en": { "role": { "documentation": "The increase (decrease) in financial assets resulting from foreign exchange. [Refer: Financial assets]" } } }, "auth_ref": [ "r446", "r454" ] }, "bti_IncreaseDecreaseThroughMovementsInUnrecognisedSchemeSurpluses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughMovementsInUnrecognisedSchemeSurpluses", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Movement in year", "label": "Increase (Decrease) Through Movements In Unrecognised Scheme Surpluses", "documentation": "Increase decrease through movements in unrecognised scheme surpluses." } } }, "auth_ref": [] }, "ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Differences on exchange", "label": "Increase (decrease) through net exchange differences, deferred tax liability (asset)" } }, "en": { "role": { "documentation": "The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)]" } } }, "auth_ref": [ "r590" ] }, "ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "label": "Increase (decrease) through net exchange differences, intangible assets and goodwill" } }, "en": { "role": { "documentation": "The increase (decrease) in intangible assets and goodwill resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets and goodwill]" } } }, "auth_ref": [ "r612" ] }, "ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsOtherThanGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "label": "Increase (decrease) through net exchange differences, intangible assets other than goodwill" } }, "en": { "role": { "documentation": "The increase (decrease) in intangible assets other than goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r170" ] }, "ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "label": "Increase (decrease) through net exchange differences, other provisions" } }, "en": { "role": { "documentation": "The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]" } } }, "auth_ref": [ "r608" ] }, "ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Differences on exchange", "label": "Increase (decrease) through net exchange differences, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The increase (decrease) in property, plant and equipment including right-of-use assets resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "ifrs-full_IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughOtherChangesPropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other net movements", "label": "Increase (decrease) through other changes, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The increase (decrease) in property, plant and equipment including right-of-use assets resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "bti_IncreaseDecreaseThroughShareBuyBackProgrammeEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughShareBuyBackProgrammeEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "verboseLabel": "share buy-back programme", "terseLabel": "Increase (decrease) in equity, share buy-back programme", "label": "Increase (Decrease) Through Share Buy-Back Programme, Equity", "documentation": "Increase (Decrease) Through Share Buy-Back Programme, Equity" } } }, "auth_ref": [] }, "ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughSharebasedPaymentTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "value of employee services", "label": "Increase (decrease) through share-based payment transactions, equity" } }, "en": { "role": { "documentation": "The increase (decrease) in equity resulting from share-based payment transactions. [Refer: Equity]" } } }, "auth_ref": [ "r4" ] }, "bti_IncreaseDecreaseThroughSharesBoughtBackAndCancelledEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughSharesBoughtBackAndCancelledEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 shares bought back and cancelled", "verboseLabel": "Changes during the year - shares bought back and cancelled", "label": "Increase (Decrease) Through Shares Bought Back And Cancelled, Equity", "documentation": "Increase (Decrease) Through Shares Bought Back And Cancelled, Equity" } } }, "auth_ref": [] }, "bti_IncreaseDecreaseThroughTaxOnPerpetualHybridBondsCouponsPaidEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughTaxOnPerpetualHybridBondsCouponsPaidEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "tax on coupons paid", "label": "Increase (Decrease) Through Tax On Perpetual Hybrid Bonds Coupons Paid, Equity", "documentation": "Increase (decrease) through tax on perpetual hybrid bonds coupons paid." } } }, "auth_ref": [] }, "bti_IncreaseDecreaseThroughTransferBetweenOtherReserveAndHeldForSaleReserveEquity": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseDecreaseThroughTransferBetweenOtherReserveAndHeldForSaleReserveEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Reclassification of equity in respect of assets classified as held-for-sale", "label": "Increase (Decrease) Through Transfer Between Other Reserve And Held-For-Sale Reserve, Equity", "documentation": "Increase (Decrease) Through Transfer Between Other Reserve And Held-For-Sale Reserve, Equity" } } }, "auth_ref": [] }, "ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughTransfersAndOtherChangesEquity", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Other movements", "label": "Increase (decrease) through other changes, equity" } }, "en": { "role": { "documentation": "The increase (decrease) in equity resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Equity]" } } }, "auth_ref": [ "r5" ] }, "ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughTransfersAndOtherChangesIntangibleAssetsAndGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reallocations", "label": "Increase (decrease) through transfers and other changes, intangible assets and goodwill" } }, "en": { "role": { "documentation": "The increase (decrease) in intangible assets and goodwill resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Intangible assets and goodwill]" } } }, "auth_ref": [ "r613" ] }, "ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughTransfersAndOtherChangesOtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reversals of unused provisions", "label": "Increase (decrease) through transfers and other changes, other provisions" } }, "en": { "role": { "documentation": "The increase (decrease) in other provisions resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Other provisions]" } } }, "auth_ref": [ "r608" ] }, "ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughTransfersPropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reallocations", "label": "Increase (decrease) through transfers, property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The increase (decrease) in property, plant and equipment including right-of-use assets resulting from transfers. [Refer: Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IncreaseDecreaseThroughTreasuryShareTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "treasury shares used for share option schemes", "label": "Increase (decrease) through treasury share transactions, equity" } }, "en": { "role": { "documentation": "The increase (decrease) in equity resulting from treasury share transactions. [Refer: Equity; Treasury shares]" } } }, "auth_ref": [ "r5" ] }, "bti_IncreaseInAmortisationIntangibleAssetsOtherThanGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseInAmortisationIntangibleAssetsOtherThanGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase in amortisation intangible assets other than goodwill", "label": "Increase In Amortisation Intangible Assets Other Than Goodwill", "documentation": "Increase In Amortisation Intangible Assets Other Than Goodwill" } } }, "auth_ref": [] }, "bti_IncreaseInPreTaxDiscountRateMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseInPreTaxDiscountRateMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase in pre tax discount rate", "label": "Increase in Pre Tax Discount Rate [Member]", "documentation": "Increase in Pre Tax Discount Rate" } } }, "auth_ref": [] }, "bti_IncreaseInPreTaxProfitBasedOnIncreaseInInterestRates": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseInPreTaxProfitBasedOnIncreaseInInterestRates", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase in pre-tax profit based on 100 basis point decrease in interest rates, or less", "label": "Increase In Pre Tax Profit Based On Increase In Interest Rates", "documentation": "Increase in pre-tax profit based on increase in interest rates." } } }, "auth_ref": [] }, "bti_IncreaseOfIncomeRelatedToPaymentObligation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IncreaseOfIncomeRelatedToPaymentObligation", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Increase of income related to payment obligation", "label": "Increase Of Income Related To Payment Obligation", "documentation": "Increase of income related to payment obligation." } } }, "auth_ref": [] }, "ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash-generating units [axis]", "label": "Cash-generating units [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r154" ] }, "ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesDomain", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash-generating units [domain]", "label": "Cash-generating units [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Cash-generating units' axis if no other member is used." } } }, "auth_ref": [ "r154", "r157" ] }, "ecd_IndividualAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "IndividualAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure", "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure", "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements", "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Individual [Axis]", "terseLabel": "Individual:" } } }, "auth_ref": [ "r486", "r497", "r507", "r531", "r540", "r544", "r552" ] }, "bti_IndividualLawsuitsExtendedDate": { "xbrltype": "dateItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IndividualLawsuitsExtendedDate", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Individual lawsuits extended date", "label": "Individual Lawsuits Extended Date", "documentation": "Individual lawsuits extended date." } } }, "auth_ref": [] }, "bti_IndividualSmokingAndHealthCasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IndividualSmokingAndHealthCasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Individual smoking and health cases", "label": "Individual Smoking And Health Cases [Member]", "documentation": "Individual smoking and health cases." } } }, "auth_ref": [] }, "bti_IndividualSmokingAndHealthCasesNonUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IndividualSmokingAndHealthCasesNonUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Individual smoking and health cases, Non-US tobacco related", "label": "Individual Smoking And Health Cases Non U S Tobacco Related [Member]", "documentation": "Individual smoking and health cases, Non-US tobacco related." } } }, "auth_ref": [] }, "bti_IndividualSmokingAndHealthCasesUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IndividualSmokingAndHealthCasesUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Individual smoking and health cases", "label": "Individual Smoking And Health Cases U S Tobacco Related [Member]", "documentation": "Individual smoking and health cases, US tobacco related." } } }, "auth_ref": [] }, "bti_InflowMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InflowMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Inflow", "label": "Inflow [Member]", "documentation": "Inflow." } } }, "auth_ref": [] }, "ifrs-full_InflowsOfCashFromInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InflowsOfCashFromInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "negatedTotalLabel": "Cash inflows from investments per cash flow statement", "label": "Inflows of cash from investing activities" } }, "en": { "role": { "documentation": "The cash inflow from investing activities." } } }, "auth_ref": [ "r617" ] }, "bti_InflowsOutflowsRelatingToDerivativeFinancialInstruments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InflowsOutflowsRelatingToDerivativeFinancialInstruments", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Outflows relating to derivative financial instruments", "label": "Inflows (Outflows) Relating To Derivative Financial Instruments", "documentation": "Inflows (outflows) of cash relating to derivative financial instruments." } } }, "auth_ref": [] }, "bti_InitialDocketNumberOfCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InitialDocketNumberOfCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Initial number of cases", "label": "Initial Docket Number Of Cases", "documentation": "Initial docket number of cases." } } }, "auth_ref": [] }, "ecd_InsiderTradingArrLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "InsiderTradingArrLineItems", "lang": { "en-us": { "role": { "label": "Insider Trading Arrangements [Line Items]", "terseLabel": "Insider Trading Arrangements:" } } }, "auth_ref": [ "r550" ] }, "ecd_InsiderTradingPoliciesProcLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "InsiderTradingPoliciesProcLineItems", "lang": { "en-us": { "role": { "label": "Insider Trading Policies and Procedures [Line Items]", "terseLabel": "Insider Trading Policies and Procedures:" } } }, "auth_ref": [ "r467", "r556" ] }, "ecd_InsiderTrdPoliciesProcAdoptedFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "InsiderTrdPoliciesProcAdoptedFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc" ], "lang": { "en-us": { "role": { "label": "Insider Trading Policies and Procedures Adopted [Flag]", "terseLabel": "Insider Trading Policies and Procedures Adopted" } } }, "auth_ref": [ "r467", "r556" ] }, "ecd_InsiderTrdPoliciesProcNotAdoptedTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "InsiderTrdPoliciesProcNotAdoptedTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc" ], "lang": { "en-us": { "role": { "label": "Insider Trading Policies and Procedures Not Adopted [Text Block]", "terseLabel": "Insider Trading Policies and Procedures Not Adopted" } } }, "auth_ref": [ "r467", "r556" ] }, "ifrs-full_IntangibleAssetsAndGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsAndGoodwill", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets", "periodStartLabel": "Net book value at 1 January", "periodEndLabel": "Net book value at 31 December", "label": "Intangible assets and goodwill" } }, "en": { "role": { "documentation": "The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill]" } } }, "auth_ref": [ "r581" ] }, "bti_IntangibleAssetsBrandAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IntangibleAssetsBrandAxis", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible Assets, Brand [Axis]", "label": "Intangible Assets, Brand [Axis]", "documentation": "Intangible Assets, Brand" } } }, "auth_ref": [] }, "bti_IntangibleAssetsBrandDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IntangibleAssetsBrandDomain", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible Assets, Brand [Domain]", "label": "Intangible Assets, Brand [Domain]", "documentation": "Intangible assets, brand [Domain]" } } }, "auth_ref": [] }, "bti_IntangibleAssetsImpairmentUponReasonablePossibleChangeEffect": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IntangibleAssetsImpairmentUponReasonablePossibleChangeEffect", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Possible impairment", "label": "Intangible Assets Impairment Upon Reasonable Possible Change Effect", "documentation": "Intangible Assets Impairment Upon Reasonable Possible Change Effect" } } }, "auth_ref": [] }, "ifrs-full_IntangibleAssetsOtherThanGoodwill": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsOtherThanGoodwill", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets", "periodStartLabel": "Opening balance, intangible assets other than goodwill", "periodEndLabel": "Closing balance, intangible assets other than goodwill", "label": "Intangible assets other than goodwill" } }, "en": { "role": { "documentation": "The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]" } } }, "auth_ref": [ "r11", "r171" ] }, "ifrs-full_IntangibleAssetsOtherThanGoodwillMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsOtherThanGoodwillMember", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets other than goodwill", "label": "Intangible assets other than goodwill [member]" } }, "en": { "role": { "documentation": "This member stands for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r405", "r437" ] }, "ifrs-full_IntangibleAssetsUnderDevelopmentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsUnderDevelopmentMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets in the course of development", "label": "Intangible assets under development [member]" } }, "en": { "role": { "documentation": "This member stands for a class of intangible assets representing such assets under development. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r413" ] }, "ifrs-full_IntangibleAssetsWithIndefiniteUsefulLife": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsWithIndefiniteUsefulLife", "crdr": "debit", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Carrying amount", "label": "Intangible assets with indefinite useful life" } }, "en": { "role": { "documentation": "The amount of intangible assets assessed as having an indefinite useful life. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r150", "r156", "r173" ] }, "ifrs-full_IntangibleAssetsWithIndefiniteUsefulLifeAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsWithIndefiniteUsefulLifeAxis", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets with indefinite useful life [axis]", "label": "Intangible assets with indefinite useful life [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r173" ] }, "ifrs-full_IntangibleAssetsWithIndefiniteUsefulLifeDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IntangibleAssetsWithIndefiniteUsefulLifeDomain", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets with indefinite useful life [domain]", "label": "Intangible assets with indefinite useful life [domain]" } }, "en": { "role": { "documentation": "This member stands for intangible assets with an indefinite useful life. It also represents the standard value for the 'Intangible assets with indefinite useful life' axis if no other member is used. [Refer: Intangible assets with indefinite useful life]" } } }, "auth_ref": [ "r173" ] }, "bti_InterestAndFairValueRelatedToRepurchaseOfBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestAndFairValueRelatedToRepurchaseOfBonds", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Impact of the early repurchase of bonds (note 8(b))", "label": "Interest And Fair Value Related To Repurchase Of Bonds", "documentation": "Interest and fair value related to repurchase of bonds." } } }, "auth_ref": [] }, "ifrs-full_InterestExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest expense", "label": "Interest expense" } }, "en": { "role": { "documentation": "The amount of expense arising from interest." } } }, "auth_ref": [ "r224", "r330", "r338" ] }, "ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestExpenseIncomeNetDefinedBenefitLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest on scheme liabilities", "negatedLabel": "Interest on scheme assets", "label": "Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)" } }, "en": { "role": { "documentation": "The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r90" ] }, "bti_InterestExpenseNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestExpenseNetDefinedBenefitLiabilityAsset", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 interest on scheme liabilities", "label": "Interest Expense Net Defined Benefit Liability Asset", "documentation": "Interest expense net defined benefit liability asset." } } }, "auth_ref": [] }, "bti_InterestExpenseNetDefinedBenefitLiabilityAssetUnrecognisedFundedSchemeSurpluses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestExpenseNetDefinedBenefitLiabilityAssetUnrecognisedFundedSchemeSurpluses", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 interest on unrecognised funded scheme surpluses", "negatedLabel": "Interest on unrecognised funded scheme surpluses", "label": "Interest (Expense) Net Defined Benefit Liability Asset Unrecognised Funded Scheme Surpluses", "documentation": "Interest expense net defined benefit liability asset unrecognised funded scheme surpluses." } } }, "auth_ref": [] }, "ifrs-full_InterestExpenseOnLeaseLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestExpenseOnLeaseLiabilities", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest expense on lease liabilities", "label": "Interest expense on lease liabilities" } }, "en": { "role": { "documentation": "The amount of interest expense on lease liabilities. [Refer: Lease liabilities]" } } }, "auth_ref": [ "r241" ] }, "bti_InterestIncomeNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestIncomeNetDefinedBenefitLiabilityAsset", "crdr": "credit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "\u2013 interest on scheme assets", "label": "Interest Income Net Defined Benefit Liability Asset", "documentation": "Interest income net defined benefit liability asset." } } }, "auth_ref": [] }, "ifrs-full_InterestIncomeOnDeposits": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestIncomeOnDeposits", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Income on cash and cash equivalents", "label": "Interest income on deposits" } }, "en": { "role": { "documentation": "The amount of interest income on deposits. [Refer: Interest income]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_InterestPaidClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestPaidClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 7.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedLabel": "Interest paid on borrowings and financing related activities", "negatedTerseLabel": "Interest paid", "label": "Interest paid, classified as financing activities" } }, "en": { "role": { "documentation": "The cash outflow for interest paid, classified as financing activities." } } }, "auth_ref": [ "r192" ] }, "ifrs-full_InterestPayable": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestPayable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest payable", "label": "Interest payable" } }, "en": { "role": { "documentation": "The amount of interest recognised as a liability." } } }, "auth_ref": [ "r578" ] }, "bti_InterestPayableInterestRateBasis": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestPayableInterestRateBasis", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of base rate charged to net finance costs", "label": "Interest Payable, Interest Rate Basis", "documentation": "Percentage of base rate charged to net finance costs." } } }, "auth_ref": [] }, "bti_InterestRateLessThanOnePercentMeasurementInputMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestRateLessThanOnePercentMeasurementInputMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest rate lower than 1%", "label": "Interest Rate Less Than One Percent, Measurement Input [Member]", "documentation": "Interest Rate Less Than One Percent, Measurement Input" } } }, "auth_ref": [] }, "ifrs-full_InterestRateMeasurementInputMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestRateMeasurementInputMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest rate", "label": "Interest rate, measurement input [member]" } }, "en": { "role": { "documentation": "This member stands for an interest rate used as a measurement input." } } }, "auth_ref": [ "r429" ] }, "bti_InterestRateRiskExposureMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestRateRiskExposureMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest rate risk exposure", "label": "Interest Rate Risk Exposure [Member]", "documentation": "Interest rate risk exposure." } } }, "auth_ref": [] }, "ifrs-full_InterestRateRiskMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestRateRiskMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest rate risk", "label": "Interest rate risk [member]" } }, "en": { "role": { "documentation": "This member stands for the type of risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in market interest rates. [Refer: Classes of financial instruments [domain]]" } } }, "auth_ref": [ "r253", "r254", "r255", "r256", "r327" ] }, "ifrs-full_InterestRateSwapContractMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestRateSwapContractMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "interest rate swaps", "label": "Interest rate swap contract [member]" } }, "en": { "role": { "documentation": "This member stands for an interest rate swap contract. [Refer: Swap contract [member]]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_InterestReceivedClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestReceivedClassifiedAsInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Interest received", "label": "Interest received, classified as investing activities" } }, "en": { "role": { "documentation": "The cash inflow from interest received, classified as investing activities." } } }, "auth_ref": [ "r192" ] }, "bti_InterestRelatedToAdjustingTaxPayables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterestRelatedToAdjustingTaxPayables", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interest related to adjusting tax payables", "label": "Interest Related To Adjusting Tax Payables", "documentation": "Interest related to adjusting tax payables." } } }, "auth_ref": [] }, "ifrs-full_InterestRevenueCalculatedUsingEffectiveInterestMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InterestRevenueCalculatedUsingEffectiveInterestMethod", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsSummaryofNetFinanceCostsIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Interest income under the effective interest method", "label": "Interest revenue calculated using effective interest method" } }, "en": { "role": { "documentation": "The amount of interest revenue calculated using the effective interest method. Effective interest method is the method that is used in the calculation of the amortised cost of a financial asset or a financial liability and in the allocation and recognition of the interest revenue or interest expense in profit or loss over the relevant period. [Refer: Revenue]" } } }, "auth_ref": [ "r46", "r47" ] }, "bti_InterimPaymentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterimPaymentMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interim payment", "label": "Interim Payment [Member]", "documentation": "Interim Payment" } } }, "auth_ref": [] }, "bti_InterimRepaymentMadeOnLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InterimRepaymentMadeOnLitigationSettlement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Interim repayment made on litigation settlement", "label": "Interim Repayment Made On Litigation Settlement", "documentation": "Minimum annual interim repayments expected to be paid on litigation settlement." } } }, "auth_ref": [] }, "ifrs-full_InternallyGeneratedMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InternallyGeneratedMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 internal development", "label": "Internally generated [member]" } }, "en": { "role": { "documentation": "This member stands for items that have been internally generated by the entity." } } }, "auth_ref": [ "r172" ] }, "bti_InternationalShareRewardSchemeISRSMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InternationalShareRewardSchemeISRSMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "International Share Reward Scheme (ISRS)", "label": "International Share Reward Scheme I S R S [Member]", "documentation": "International Share Reward Scheme I S R S" } } }, "auth_ref": [] }, "ifrs-full_Inventories": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Inventories", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 5.0 }, "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Inventories", "totalLabel": "Inventories", "label": "Current inventories" } }, "en": { "role": { "documentation": "The amount of current inventories. [Refer: Inventories]" } } }, "auth_ref": [ "r13", "r106", "r381" ] }, "ifrs-full_InventoryWritedown2011": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InventoryWritedown2011", "presentation": [ "http://www.bat.com/role/InventoriesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Inventory write-offs", "verboseLabel": "Inventory write-offs", "label": "Inventory write-down" } }, "en": { "role": { "documentation": "The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories]" } } }, "auth_ref": [ "r58", "r107" ] }, "ifrs-full_InvestmentAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InvestmentAccountedForUsingEquityMethod", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 7.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments in associates and joint ventures", "periodStartLabel": "1 January", "periodEndLabel": "31 December", "label": "Investments accounted for using equity method" } }, "en": { "role": { "documentation": "The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]" } } }, "auth_ref": [ "r12", "r226", "r334" ] }, "bti_InvestmentHoldingPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentHoldingPeriod", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investment holding period", "label": "Investment Holding Period", "documentation": "Investment holding period." } } }, "auth_ref": [] }, "bti_InvestmentInAssociatesAndAcquisitionsOfOtherSubsidiariesNetOfCashAcquired": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentInAssociatesAndAcquisitionsOfOtherSubsidiariesNetOfCashAcquired", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": -1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Investment in associates and acquisitions of other subsidiaries net of cash acquired", "label": "Investment In Associates And Acquisitions Of Other Subsidiaries, Net Of Cash Acquired", "documentation": "Acquisition of subsidiaries and purchase of interests in investments accounted for using equity method." } } }, "auth_ref": [] }, "bti_InvestmentNumberOfSharesHeldDisposed": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentNumberOfSharesHeldDisposed", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of shares held disposed (in shares)", "label": "Investment, Number of Shares Held Disposed", "documentation": "Investment, Number of Shares Held Disposed" } } }, "auth_ref": [] }, "bti_InvestmentTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentTerm", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investment term", "label": "Investment Term", "documentation": "Investment Term" } } }, "auth_ref": [] }, "bti_InvestmentsHeldAtFairValueItemsThatMayBeReclassifiedSubsequentlyToProfitOrLossAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsHeldAtFairValueItemsThatMayBeReclassifiedSubsequentlyToProfitOrLossAbstract", "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "label": "Investments Held At Fair Value, Items That May Be Reclassified Subsequently To Profit Or Loss [Abstract]", "documentation": "Investments Held At Fair Value, Items That May Be Reclassified Subsequently To Profit Or Loss" } } }, "auth_ref": [] }, "bti_InvestmentsHeldAtFairValueItemsThatWillNotBeReclassifiedSubsequentlyToProfitOrLossAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsHeldAtFairValueItemsThatWillNotBeReclassifiedSubsequentlyToProfitOrLossAbstract", "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "label": "Investments Held At Fair Value, Items That Will Not Be Reclassified Subsequently To Profit Or Loss [Abstract]", "documentation": "Investments Held At Fair Value, Items That Will Not Be Reclassified Subsequently To Profit Or Loss" } } }, "auth_ref": [] }, "bti_InvestmentsHeldAtFairValueThroughProfitAndLossDueToExchangeControlRestrictions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsHeldAtFairValueThroughProfitAndLossDueToExchangeControlRestrictions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value through profit and loss due to exchange control restrictions", "label": "Investments Held At Fair Value Through Profit And Loss Due To Exchange Control Restrictions", "documentation": "Investments held at fair value through profit and loss due to exchange control restrictions." } } }, "auth_ref": [] }, "ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InvestmentsInAssociatesAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments in associates and joint ventures", "label": "Investments in associates accounted for using equity method" } }, "en": { "role": { "documentation": "The amount of investments in associates accounted for using the equity method. [Refer: Total for all associates [member]; Investments accounted for using equity method]" } } }, "auth_ref": [ "r581" ] }, "bti_InvestmentsInAssociatesAndJointVenturesAdditions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsInAssociatesAndJointVenturesAdditions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additional", "label": "Investments In Associates And Joint Ventures, Additions", "documentation": "Additional investments in associates and joint ventures." } } }, "auth_ref": [] }, "bti_InvestmentsInAssociatesAndJointVenturesDisposals": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsInAssociatesAndJointVenturesDisposals", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Disposals", "label": "Investments In Associates And Joint Ventures, Disposals", "documentation": "Investments In Associates And Joint Ventures, Disposals" } } }, "auth_ref": [] }, "bti_InvestmentsInAssociatesAndJointVenturesOtherEquityMovements": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "InvestmentsInAssociatesAndJointVenturesOtherEquityMovements", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other equity movements", "label": "Investments In Associates And Joint Ventures, Other Equity Movements", "documentation": "Other equity movements in investments in associates and joint ventures." } } }, "auth_ref": [] }, "ifrs-full_InvestmentsInSubsidiaries": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InvestmentsInSubsidiaries", "crdr": "debit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investment in subsidiaries (that are not issuers \u2028or guarantors)", "label": "Investments in subsidiaries reported in separate financial statements" } }, "en": { "role": { "documentation": "The amount of investments in subsidiaries in an entity's separate financial statements. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r129" ] }, "ifrs-full_InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract", "lang": { "en-us": { "role": { "label": "Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract]" } } }, "auth_ref": [] }, "ifrs-full_InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "periodStartLabel": "Beginning balance", "periodEndLabel": "Ending balance", "terseLabel": "Investments other than investments accounted for using equity method", "verboseLabel": "Investment held at fair value", "label": "Investments other than investments accounted for using equity method" } }, "en": { "role": { "documentation": "The amount of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method]" } } }, "auth_ref": [ "r581" ] }, "bti_IssuanceCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IssuanceCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total issuance cost", "label": "Issuance Costs", "documentation": "Issuance costs." } } }, "auth_ref": [] }, "bti_IssuanceCostsTax": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "IssuanceCostsTax", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on issuance costs", "label": "Issuance Costs, Tax", "documentation": "Issuance Costs, Tax" } } }, "auth_ref": [] }, "ifrs-full_IssuedCapital": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IssuedCapital", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAttributableToOwnersOfParent", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share capital", "periodStartLabel": "Allotted and fully paid beginning balance", "periodEndLabel": "Allotted and fully paid ending balance", "label": "Issued capital" } }, "en": { "role": { "documentation": "The nominal value of capital issued." } } }, "auth_ref": [ "r384" ] }, "ifrs-full_IssuedCapitalMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "IssuedCapitalMember", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Share capital", "label": "Issued capital [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing issued capital." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_ItemsOfContingentLiabilitiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ItemsOfContingentLiabilitiesAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Items of contingent liabilities [axis]", "label": "Items of contingent liabilities [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r277" ] }, "ifrs-full_ItemsOfContingentLiabilitiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ItemsOfContingentLiabilitiesDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Items of contingent liabilities [domain]", "label": "Items of contingent liabilities [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated individual items of contingent liabilities. It also represents the standard value for the 'Items of contingent liabilities' axis if no other member is used. [Refer: Classes of contingent liabilities [domain]]" } } }, "auth_ref": [ "r277" ] }, "currency_JPY": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "JPY", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Japan, Yen", "label": "Japan, Yen" } } }, "auth_ref": [] }, "bti_JonesVAmericanTobaccoCoIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "JonesVAmericanTobaccoCoIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Jones v. American Tobacco Co.", "label": "Jones V American Tobacco Co Inc [Member]", "documentation": "Jones v American Tobacco Co., Inc." } } }, "auth_ref": [] }, "bti_KPMGLLPFirmsAndAssociatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KPMGLLPFirmsAndAssociatesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "KPMG LLP Firms and Associates", "label": "KPMG LLP Firms And Associates [Member]", "documentation": "KPMG LLP firms and associates." } } }, "auth_ref": [] }, "country_KR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "KR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "South Korea", "label": "KOREA, REPUBLIC OF" } } }, "auth_ref": [] }, "currency_KRW": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "KRW", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Korea (South), Won", "label": "Korea (South), Won" } } }, "auth_ref": [] }, "bti_KalamazooRiverMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KalamazooRiverMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Kalamazoo River", "label": "Kalamazoo River [Member]", "documentation": "Kalamazoo River." } } }, "auth_ref": [] }, "bti_KamaranIndustryAndInvestmentCompanyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KamaranIndustryAndInvestmentCompanyMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Kamaran Industry & Investment Company", "label": "Kamaran Industry And Investment Company [Member]", "documentation": "Kamaran Industry and Investment Company." } } }, "auth_ref": [] }, "bti_KeyAssumptionsForImpairmentTestingAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyAssumptionsForImpairmentTestingAxis", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Key Assumptions For Impairment Testing [Axis]", "label": "Key Assumptions For Impairment Testing [Axis]", "documentation": "Key assumptions for Impairment testing." } } }, "auth_ref": [] }, "bti_KeyAssumptionsForImpairmentTestingDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyAssumptionsForImpairmentTestingDomain", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Key Assumptions For Impairment Testing [Domain]", "label": "Key Assumptions For Impairment Testing [Domain]", "documentation": "Key Assumptions For Impairment Testing [Domain]" } } }, "auth_ref": [] }, "ifrs-full_KeyManagementPersonnelCompensation": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "KeyManagementPersonnelCompensation", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Key management personnel compensation - total", "label": "Key management personnel compensation" } }, "en": { "role": { "documentation": "The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]" } } }, "auth_ref": [ "r117" ] }, "bti_KeyManagementPersonnelCompensationBuyOut": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationBuyOut", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 buy-out", "label": "Key Management Personnel Compensation, Buy Out", "documentation": "Key Management Personnel Compensation, Buy Out" } } }, "auth_ref": [] }, "bti_KeyManagementPersonnelCompensationFees": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationFees", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 fees", "label": "Key Management Personnel Compensation Fees", "documentation": "Key management personnel compensation fees." } } }, "auth_ref": [] }, "bti_KeyManagementPersonnelCompensationOtherEmoluments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationOtherEmoluments", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationPensionAndOtherEmoluments", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 other emoluments", "label": "Key Management Personnel Compensation Other Emoluments", "documentation": "Key management personnel compensation other emoluments." } } }, "auth_ref": [] }, "ifrs-full_KeyManagementPersonnelCompensationOtherLongtermBenefits": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "KeyManagementPersonnelCompensationOtherLongtermBenefits", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 long-term incentives", "label": "Key management personnel compensation, other long-term employee benefits" } }, "en": { "role": { "documentation": "The amount of compensation to key management personnel in the form of other long-term employee benefits. [Refer: Other long-term employee benefits; Key management personnel of entity or parent [member]]" } } }, "auth_ref": [ "r115" ] }, "bti_KeyManagementPersonnelCompensationPensionAndOtherEmoluments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationPensionAndOtherEmoluments", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Sub-total", "label": "Key Management Personnel Compensation Pension And Other Emoluments", "documentation": "Key management personnel compensation pension and other emoluments." } } }, "auth_ref": [] }, "ifrs-full_KeyManagementPersonnelCompensationPostemploymentBenefits": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "KeyManagementPersonnelCompensationPostemploymentBenefits", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationPensionAndOtherEmoluments", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 post-employment benefits", "label": "Key management personnel compensation, post-employment benefits" } }, "en": { "role": { "documentation": "The amount of compensation to key management personnel in the form of post-employment benefits. [Refer: Key management personnel of entity or parent [member]]" } } }, "auth_ref": [ "r114" ] }, "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Sub-total", "label": "Key Management Personnel Compensation Salary Fees Benefits And Incentives", "documentation": "Key management personnel compensation salary, fees, benefits and incentives." } } }, "auth_ref": [] }, "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsIncentivesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationSalaryFeesBenefitsIncentivesAbstract", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Salary; fees; benefits; incentives", "label": "Key Management Personnel Compensation Salary Fees Benefits Incentives [Abstract]", "documentation": "Key management personnel compensation salary fees benefits incentives." } } }, "auth_ref": [] }, "ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "KeyManagementPersonnelCompensationSharebasedPayment", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 share-based payments", "label": "Key management personnel compensation, share-based payment" } }, "en": { "role": { "documentation": "The amount of compensation to key management personnel in the form of share-based payments. [Refer: Key management personnel of entity or parent [member]]" } } }, "auth_ref": [ "r116" ] }, "bti_KeyManagementPersonnelCompensationShortTermIncentives": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationShortTermIncentives", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 short-term incentives", "label": "Key Management Personnel Compensation, Short Term Incentives", "documentation": "Key management personnel compensation short-term incentives." } } }, "auth_ref": [] }, "ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "KeyManagementPersonnelCompensationShorttermEmployeeBenefits", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 salaries and other short-term employee benefits", "totalLabel": "Total emoluments", "label": "Key management personnel compensation, short-term employee benefits" } }, "en": { "role": { "documentation": "The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]" } } }, "auth_ref": [ "r113" ] }, "bti_KeyManagementPersonnelCompensationTaxableBenefits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelCompensationTaxableBenefits", "crdr": "debit", "calculation": { "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 taxable benefits", "label": "Key Management Personnel Compensation, Taxable Benefits", "documentation": "Key management personnel compensation taxable benefits." } } }, "auth_ref": [] }, "bti_KeyManagementPersonnelPensionAndOtherEmolumentsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KeyManagementPersonnelPensionAndOtherEmolumentsAbstract", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pension; other emoluments", "label": "Key Management Personnel Pension And Other Emoluments [Abstract]", "documentation": "Key management personnel pension and other emoluments." } } }, "auth_ref": [] }, "bti_KnightClassActionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "KnightClassActionMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Knight class action", "label": "Knight Class Action [Member]", "documentation": "Knight Class Action." } } }, "auth_ref": [] }, "ifrs-full_LandMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LandMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Land", "label": "Land [member]" } }, "en": { "role": { "documentation": "This member stands for a class of property, plant and equipment representing land held by the entity for use in operations. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r393" ] }, "bti_LargeTaxpayersUnitLTUMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LargeTaxpayersUnitLTUMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Large Taxpayers Unit (LTU)", "label": "Large Taxpayers Unit (LTU) [Member]", "documentation": "Large Taxpayers Unit (LTU)" } } }, "auth_ref": [] }, "bti_LaterThanFiftyYearsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LaterThanFiftyYearsMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Beyond 50 years", "label": "Later Than Fifty Years [Member]", "documentation": "Later Than Fifty Years" } } }, "auth_ref": [] }, "ifrs-full_LaterThanFiveYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanFiveYearsMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Beyond five years", "verboseLabel": "Beyond 5 years", "label": "Later than five years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than five years." } } }, "auth_ref": [ "r247", "r249", "r259", "r450", "r452", "r455" ] }, "ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanFourYearsAndNotLaterThanFiveYearsMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Between four and five years", "verboseLabel": "Between 4-5 years", "label": "Later than four years and not later than five years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than four years and not later than five years." } } }, "auth_ref": [ "r247", "r249", "r259", "r450", "r455", "r578" ] }, "ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanOneYearAndNotLaterThanFiveYearsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Between one and five years", "label": "Later than one year and not later than five years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than one year and not later than five years." } } }, "auth_ref": [ "r449", "r455" ] }, "ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanOneYearAndNotLaterThanTwoYearsMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Later than one year and not later than two years", "verboseLabel": "Between 1-2 years", "label": "Later than one year and not later than two years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than one year and not later than two years." } } }, "auth_ref": [ "r247", "r249", "r259", "r450", "r455", "r578" ] }, "ifrs-full_LaterThanOneYearMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanOneYearMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "2025", "label": "Later than one year [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than one year." } } }, "auth_ref": [ "r26" ] }, "ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanThreeYearsAndNotLaterThanFourYearsMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Between three and four years", "verboseLabel": "Between 3-4 years", "label": "Later than three years and not later than four years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than three years and not later than four years." } } }, "auth_ref": [ "r247", "r249", "r259", "r450", "r455", "r578" ] }, "ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LaterThanTwoYearsAndNotLaterThanThreeYearsMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "2026 and thereafter", "verboseLabel": "Between two and three years", "label": "Later than two years and not later than three years [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of later than two years and not later than three years." } } }, "auth_ref": [ "r247", "r249", "r259", "r450", "r455", "r578" ] }, "bti_LawsuitSeekDamagesAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LawsuitSeekDamagesAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lawsuit seek damage amount", "label": "Lawsuit Seek Damages Amount", "documentation": "Lawsuit seek damages amount." } } }, "auth_ref": [] }, "bti_LeafPayablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LeafPayablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Leaf payables", "label": "Leaf Payables [Member]", "documentation": "Leaf Payables" } } }, "auth_ref": [] }, "bti_LeafSuppliersMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LeafSuppliersMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Leaf suppliers", "label": "Leaf Suppliers [Member]", "documentation": "Leaf Suppliers" } } }, "auth_ref": [] }, "bti_LeafSupplyArrangementsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LeafSupplyArrangementsMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Leaf Supply Arrangements", "label": "Leaf Supply Arrangements [Member]", "documentation": "Leaf supply arrangements." } } }, "auth_ref": [] }, "ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lease commitments for short-term leases for which recognition exemption has been used", "label": "Lease commitments for short-term leases for which recognition exemption has been used" } }, "en": { "role": { "documentation": "The amount of the lease commitments for short-term leases accounted for applying paragraph 6 of IFRS 16. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease." } } }, "auth_ref": [ "r246" ] }, "ifrs-full_LeaseLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LeaseLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lease liabilities", "label": "Lease liabilities" } }, "en": { "role": { "documentation": "The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration." } } }, "auth_ref": [ "r240" ] }, "ifrs-full_LeaseLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LeaseLiabilitiesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lease liabilities", "label": "Lease liabilities [member]" } }, "en": { "role": { "documentation": "This member stands for lease liabilities. [Refer: Lease liabilities]" } } }, "auth_ref": [ "r420", "r424" ] }, "bti_LeaseTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LeaseTerm", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lease term", "label": "Lease Term", "documentation": "Lease term." } } }, "auth_ref": [] }, "bti_LeaseholdPropertyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LeaseholdPropertyMember", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Leasehold property", "label": "Leasehold Property [Member]", "documentation": "Leasehold property." } } }, "auth_ref": [] }, "bti_LegalCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LegalCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend paid by Sequana", "label": "Legal Costs", "documentation": "Legal costs." } } }, "auth_ref": [] }, "bti_LegalCostsIncurred": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LegalCostsIncurred", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Legal costs incurred", "label": "Legal Costs Incurred", "documentation": "Legal costs incurred." } } }, "auth_ref": [] }, "dei_LegalEntityAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "LegalEntityAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Legal Entity [Axis]", "label": "Legal Entity [Axis]", "documentation": "The set of legal entities associated with a report." } } }, "auth_ref": [] }, "ifrs-full_LegalProceedingsContingentLiabilityMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LegalProceedingsContingentLiabilityMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Legal proceedings contingent liability [member]", "label": "Legal proceedings contingent liability [member]" } }, "en": { "role": { "documentation": "This member stands for a contingent liability for legal proceedings. [Refer: Classes of contingent liabilities [domain]]" } } }, "auth_ref": [ "r408" ] }, "ifrs-full_LegalProceedingsProvisionMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LegalProceedingsProvisionMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation related deposits", "verboseLabel": "Legal proceedings provision", "label": "Legal proceedings provision [member]" } }, "en": { "role": { "documentation": "This member stands for a provision for legal proceedings. [Refer: Classes of other provisions [domain]]" } } }, "auth_ref": [ "r407", "r409" ] }, "ifrs-full_Level1OfFairValueHierarchyMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Level1OfFairValueHierarchyMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Level 1", "label": "Level 1 of fair value hierarchy [member]" } }, "en": { "role": { "documentation": "This member stands for a category of the fair value hierarchy where inputs to the valuation techniques are quoted prices (unadjusted) in active markets for identical assets or liabilities that the entity can access at the measurement date." } } }, "auth_ref": [ "r97", "r147", "r152", "r231" ] }, "ifrs-full_Level2OfFairValueHierarchyMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Level2OfFairValueHierarchyMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Level 2", "label": "Level 2 of fair value hierarchy [member]" } }, "en": { "role": { "documentation": "This member stands for a category of the fair value hierarchy where inputs to the valuation techniques are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly." } } }, "auth_ref": [ "r147", "r152", "r231" ] }, "ifrs-full_Level3OfFairValueHierarchyMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Level3OfFairValueHierarchyMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Level 3", "label": "Level 3 of fair value hierarchy [member]" } }, "en": { "role": { "documentation": "This member stands for a category of the fair value hierarchy where inputs to the valuation techniques are unobservable inputs for the asset or liability. Unobservable inputs are inputs for which market data are not available and that are developed using the best information available about the assumptions that the market participants would use when pricing the asset or liability." } } }, "auth_ref": [ "r147", "r152", "r231" ] }, "ifrs-full_LevelsOfFairValueHierarchyAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LevelsOfFairValueHierarchyAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Levels of fair value hierarchy [axis]", "label": "Levels of fair value hierarchy [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r97", "r231" ] }, "ifrs-full_LevelsOfFairValueHierarchyDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LevelsOfFairValueHierarchyDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofAssetsandLiabilitiesMeasuredatFairValueDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Levels of fair value hierarchy [domain]", "label": "Levels of fair value hierarchy [domain]" } }, "en": { "role": { "documentation": "This member stands for all levels of the fair value hierarchy. It also represents the standard value for the 'Levels of fair value hierarchy' axis if no other member is used." } } }, "auth_ref": [ "r97", "r231" ] }, "ifrs-full_LiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiabilitiesAbstract", "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities", "label": "Liabilities [abstract]" } } }, "auth_ref": [] }, "ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiabilitiesArisingFromFinancingActivitiesAxis", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities arising from financing activities [axis]", "label": "Liabilities arising from financing activities [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r421" ] }, "ifrs-full_LiabilitiesArisingFromFinancingActivitiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiabilitiesArisingFromFinancingActivitiesDomain", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities arising from financing activities", "label": "Liabilities arising from financing activities [domain]" } }, "en": { "role": { "documentation": "This member stands for liabilities arising from financing activities. It also represents the standard value for the 'Liabilities arising from financing activities' axis if no other member is used. [Refer: Liabilities arising from financing activities]" } } }, "auth_ref": [ "r421" ] }, "ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiabilitiesFromSharebasedPaymentTransactions2011", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total liability", "label": "Liabilities from share-based payment transactions" } }, "en": { "role": { "documentation": "The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Types of share-based payment arrangements [domain]]" } } }, "auth_ref": [ "r273" ] }, "ifrs-full_LiabilityAssetOfDefinedBenefitPlans": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiabilityAssetOfDefinedBenefitPlans", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Net retirement benefit asset", "periodStartLabel": "Present value beginning balance", "periodEndLabel": "Present value ending balance", "label": "Net defined benefit liability (asset)" } }, "en": { "role": { "documentation": "The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r88" ] }, "ifrs-full_LiquidityRiskMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LiquidityRiskMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liquidity Risk", "label": "Liquidity risk [member]" } }, "en": { "role": { "documentation": "This member stands for the risk that an entity will encounter difficulty in meeting obligations associated with financial liabilities that are settled by delivering cash or another financial asset. [Refer: Financial assets; Financial liabilities]" } } }, "auth_ref": [ "r253", "r254", "r255", "r445" ] }, "bti_ListedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ListedMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Listed", "label": "Listed [Member]", "documentation": "Listed." } } }, "auth_ref": [] }, "bti_LitigationAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationAxis", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation", "label": "Litigation [Axis]", "documentation": "Litigation." } } }, "auth_ref": [] }, "srt_LitigationCaseAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "LitigationCaseAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation Case [Axis]", "label": "Litigation Case [Axis]", "documentation": "Information by type of judicial proceeding, alternative dispute resolution or claim." } } }, "auth_ref": [] }, "srt_LitigationCaseTypeDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "LitigationCaseTypeDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation Case [Domain]", "label": "Litigation Case [Domain]", "documentation": "Judicial proceeding, alternative dispute resolution or claim. For example, but not limited to, name of case, category of litigation, or other differentiating information." } } }, "auth_ref": [] }, "bti_LitigationDeposits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationDeposits", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation deposits", "label": "Litigation Deposits", "documentation": "Litigation deposits." } } }, "auth_ref": [] }, "bti_LitigationDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationDomain", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation [Domain]", "label": "Litigation [Domain]", "documentation": "Litigation [Domain]" } } }, "auth_ref": [] }, "bti_LitigationExpensesAndPaymentsUnderAgreementsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationExpensesAndPaymentsUnderAgreementsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTables" ], "lang": { "en-us": { "role": { "terseLabel": "Operating Subsidiaries' Expenses and Payments under State Settlement Agreements", "label": "Litigation Expenses And Payments Under Agreements Explanatory [Table Text Block]", "documentation": "Litigation expenses and payments under agreements explanatory." } } }, "auth_ref": [] }, "bti_LitigationProjectedSettlementCashPayments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationProjectedSettlementCashPayments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Projected settlement cash payments", "label": "Litigation Projected Settlement Cash Payments", "documentation": "Litigation projected settlement cash payments." } } }, "auth_ref": [] }, "bti_LitigationProjectedSettlementExpenses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationProjectedSettlementExpenses", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Projected settlement expenses", "label": "Litigation Projected Settlement Expenses", "documentation": "Litigation projected settlement expenses." } } }, "auth_ref": [] }, "bti_LitigationRelatedDepositsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationRelatedDepositsMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation Related Deposits", "label": "Litigation Related Deposits [Member]", "documentation": "Litigation Related Deposits" } } }, "auth_ref": [] }, "bti_LitigationSecurityGuaranteeAmountToBePaid": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSecurityGuaranteeAmountToBePaid", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Security amount to be posted by parties", "label": "Litigation Security Guarantee Amount To Be Paid", "documentation": "Litigation security guarantee amount to be paid." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Final judgment litigation settlement amount", "label": "Litigation Settlement Amount", "documentation": "Litigation settlement amount." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmountApplyingPrudentialJudgement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmountApplyingPrudentialJudgement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount, applying judgement", "label": "Litigation Settlement Amount Applying Prudential Judgement", "documentation": "Litigation settlement amount, applying Prudential judgement." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmountAwardedToPlaintiff": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmountAwardedToPlaintiff", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount", "label": "Litigation Settlement Amount Awarded To Plaintiff", "documentation": "Litigation settlement amount awarded to plaintiff." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmountAwardedToPlaintiffAnnualInstallmentAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmountAwardedToPlaintiffAnnualInstallmentAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement, annual installment amount", "label": "Litigation Settlement Amount Awarded To Plaintiff Annual Installment Amount", "documentation": "Litigation settlement amount awarded to plaintiff annual installment amount." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmountAwardedToPlaintiffIncludingFeesAndExpenses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmountAwardedToPlaintiffIncludingFeesAndExpenses", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loss contingency, right to re-file plaintiffs, period", "label": "Litigation Settlement Amount Awarded To Plaintiff Including Fees And Expenses", "documentation": "Litigation settlement amount awarded to plaintiff including fees and expenses." } } }, "auth_ref": [] }, "bti_LitigationSettlementAmountReceivable": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementAmountReceivable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount liable to pay due to calculation change", "label": "Litigation Settlement Amount Receivable", "documentation": "Litigation settlement amount receivable." } } }, "auth_ref": [] }, "bti_LitigationSettlementCashPayments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementCashPayments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement cash payments", "label": "Litigation Settlement Cash Payments", "documentation": "Litigation settlement cash payments." } } }, "auth_ref": [] }, "bti_LitigationSettlementExpenses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementExpenses", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement expenses", "label": "Litigation Settlement Expenses", "documentation": "Litigation settlement expenses." } } }, "auth_ref": [] }, "bti_LitigationSettlementFeesAndExpensesAwardedToCounsel": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementFeesAndExpensesAwardedToCounsel", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount of plaintiff's counsel fees payable", "label": "Litigation Settlement Fees And Expenses Awarded To Counsel", "documentation": "Litigation settlement fees and expenses awarded to counsel." } } }, "auth_ref": [] }, "bti_LitigationSettlementNumberOfInstallmentOfPayment": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementNumberOfInstallmentOfPayment", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of annual installment for payment", "label": "Litigation Settlement Number Of Installment Of Payment", "documentation": "Litigation settlement number of installment of payment." } } }, "auth_ref": [] }, "bti_LitigationSettlementProvisionalExecutionAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementProvisionalExecutionAmount", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement provisional execution amount", "label": "Litigation Settlement Provisional Execution Amount", "documentation": "Litigation settlement provisional execution amount." } } }, "auth_ref": [] }, "bti_LitigationSettlementReductionOfTotalMaximumAdjustments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementReductionOfTotalMaximumAdjustments", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement reduction of total maximum adjustments", "label": "Litigation Settlement Reduction Of Total Maximum Adjustments", "documentation": "Litigation settlement reduction of total maximum adjustments." } } }, "auth_ref": [] }, "bti_LitigationSettlementSecurityGuaranteeAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementSecurityGuaranteeAmount", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement guarantee amount", "label": "Litigation Settlement Security Guarantee Amount", "documentation": "Litigation settlement security guarantee amount." } } }, "auth_ref": [] }, "bti_LitigationSettlementsAttorneysFees": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementsAttorneysFees", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Attorneys fees", "label": "Litigation Settlements, Attorneys Fees", "documentation": "Litigation Settlements, Attorneys Fees" } } }, "auth_ref": [] }, "bti_LitigationSettlementsAttorneysFeesAwardedToTheState": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementsAttorneysFeesAwardedToTheState", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Attorneys fees awarded to the state", "label": "Litigation Settlements, Attorneys Fees Awarded To The State", "documentation": "Litigation Settlements, Attorneys Fees Awarded To The State" } } }, "auth_ref": [] }, "bti_LitigationSettlementsCompensatoryDamagesAwardedToTheState": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LitigationSettlementsCompensatoryDamagesAwardedToTheState", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Compensatory damages awarded to the state", "label": "Litigation Settlements, Compensatory Damages Awarded To The State", "documentation": "Litigation Settlements, Compensatory Damages Awarded To The State" } } }, "auth_ref": [] }, "bti_LoansAndOtherReceivables": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LoansAndOtherReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails_1": { "parentTag": "ifrs-full_TradeAndOtherReceivables", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loans and other receivables", "label": "Loans And Other Receivables", "documentation": "Loans And Other Receivables" } } }, "auth_ref": [] }, "bti_LoansAndOtherReceivablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LoansAndOtherReceivablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loans and other receivables", "label": "Loans And Other Receivables [Member]", "documentation": "Loans And Other Receivables" } } }, "auth_ref": [] }, "ifrs-full_LoansReceived": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LoansReceived", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bank loans", "label": "Loans received" } }, "en": { "role": { "documentation": "The amount of loans received." } } }, "auth_ref": [ "r578" ] }, "dei_LocalPhoneNumber": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "LocalPhoneNumber", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Local Phone Number", "label": "Local Phone Number", "documentation": "Local phone number for entity." } } }, "auth_ref": [] }, "bti_LocalStatutoryAndGroupReportingAuditsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LocalStatutoryAndGroupReportingAuditsMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Local Statutory and Group Reporting Audits", "label": "Local Statutory And Group Reporting Audits [Member]", "documentation": "Local statutory and Group reporting audits." } } }, "auth_ref": [] }, "bti_LoewsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LoewsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loews", "label": "Loews [Member]", "documentation": "Loews" } } }, "auth_ref": [] }, "bti_LogisticsSuppliersMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LogisticsSuppliersMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Logistics suppliers", "label": "Logistics Suppliers [Member]", "documentation": "Logistics Suppliers" } } }, "auth_ref": [] }, "bti_LongTermIncentivePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LongTermIncentivePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Long Term Incentive Plan", "label": "Long Term Incentive Plan [Member]", "documentation": "Long-term incentive plan (LTIP)" } } }, "auth_ref": [] }, "ifrs-full_LongtermBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LongtermBorrowings", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Borrowings", "terseLabel": "Non-current borrowings", "label": "Non-current portion of non-current borrowings" } }, "en": { "role": { "documentation": "The non-current portion of non-current borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_LongtermBorrowingsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LongtermBorrowingsMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Long-term Borrowings", "label": "Long-term borrowings [member]" } }, "en": { "role": { "documentation": "This member stands for long-term borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r420", "r424" ] }, "bti_LorillardIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LorillardIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lorillard Inc", "label": "Lorillard Inc [Member]", "documentation": "Lorillard Inc." } } }, "auth_ref": [] }, "bti_LorillardTobaccoAndRJRTMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LorillardTobaccoAndRJRTMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lorillard Tobacco and RJRT", "label": "Lorillard Tobacco And RJRT [Member]", "documentation": "Lorillard Tobacco and RJRT." } } }, "auth_ref": [] }, "bti_LorillardTobaccoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LorillardTobaccoMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Lorillard Tobacco", "label": "Lorillard Tobacco [Member]", "documentation": "Lorillard Tobacco." } } }, "auth_ref": [] }, "bti_LossContingencyAdditionalNumberOfCasesPending": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyAdditionalNumberOfCasesPending", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases", "label": "Loss Contingency Additional Number Of Cases Pending", "documentation": "Loss contingency additional number of cases pending." } } }, "auth_ref": [] }, "bti_LossContingencyAmountOfOverallDamagesComprisingCompensatoryDamages": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyAmountOfOverallDamagesComprisingCompensatoryDamages", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loss contingency amount of overall damages comprising compensatory damages", "label": "Loss Contingency Amount Of Overall Damages Comprising Compensatory Damages", "documentation": "Loss contingency, amount of overall damages comprising compensatory damages." } } }, "auth_ref": [] }, "bti_LossContingencyClaimForDisgorgement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyClaimForDisgorgement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Industry claim for disgorgement", "label": "Loss Contingency Claim For Disgorgement", "documentation": "Loss contingency claim for disgorgement." } } }, "auth_ref": [] }, "bti_LossContingencyDamagesSoughtByPlaintiffs": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyDamagesSoughtByPlaintiffs", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation damages sought value", "label": "Loss Contingency Damages Sought By Plaintiffs", "documentation": "Loss contingency damages sought by plaintiffs." } } }, "auth_ref": [] }, "bti_LossContingencyNewNumberOfCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNewNumberOfCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New number of cases", "label": "Loss Contingency New Number Of Cases", "documentation": "Loss Contingency New Number Of Cases" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases", "label": "Loss Contingency Number Of Cases", "documentation": "Loss contingency, number of cases." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesAffirmedInFavourOfDefendants": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesAffirmedInFavourOfDefendants", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total number of cases affirmed in favour of defendants", "label": "Loss Contingency Number Of Cases Affirmed In Favour Of Defendants", "documentation": "Loss contingency number of cases affirmed in favour of defendants." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesAffirmedInFavourOfPlaintiffs": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesAffirmedInFavourOfPlaintiffs", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total number of cases affirmed in favour of plaintiffs", "label": "Loss Contingency Number Of Cases Affirmed In Favour Of Plaintiffs", "documentation": "Loss contingency number of cases affirmed in favour of plaintiffs." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesDefendants": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesDefendants", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases defendants", "label": "Loss Contingency Number Of Cases Defendants", "documentation": "Loss contingency number of cases defendants." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesDismissedDuringTrial": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesDismissedDuringTrial", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases dismissed during trial", "verboseLabel": "Number of cases dismissed", "label": "Loss Contingency Number Of Cases Dismissed During Trial", "documentation": "Loss contingency number of cases dismissed during trial." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesForWhichDamagesPaid": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesForWhichDamagesPaid", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases for which damages paid to plaintiffs", "label": "Loss Contingency Number Of Cases For Which Damages Paid", "documentation": "Loss contingency, number of cases for which damages paid." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesForWhichNewTrialIsOrdered": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesForWhichNewTrialIsOrdered", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases for which new trial is ordered", "label": "Loss Contingency Number Of Cases For Which New Trial Is Ordered", "documentation": "Loss Contingency Number Of Cases For Which New Trial Is Ordered" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesMistrialsDeclared": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesMistrialsDeclared", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases, mistrials declared", "label": "Loss Contingency Number Of Cases Mistrials Declared", "documentation": "Loss contingency number of cases mistrials declared." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesPending": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesPending", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total number of cases", "label": "Loss Contingency, Number Of Cases Pending", "documentation": "Loss contingency number of cases pending." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesTried": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesTried", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total number of trials", "label": "Loss Contingency Number Of Cases Tried", "documentation": "Loss contingency number of cases tried." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesTriedResultingInPlaintiffsVerdict": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesTriedResultingInPlaintiffsVerdict", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of trials resulting in plaintiffs\u2019 verdicts", "label": "Loss Contingency Number Of Cases Tried Resulting In Plaintiff's Verdict", "documentation": "Loss Contingency Number Of Cases Tried Resulting In Plaintiff's Verdict" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesTriedTwice": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesTriedTwice", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases tried twice", "label": "Loss Contingency Number Of Cases Tried Twice", "documentation": "Loss Contingency Number Of Cases Tried Twice" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfCasesWithTiedDecisions": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfCasesWithTiedDecisions", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cases with tied decisions", "label": "Loss Contingency Number Of Cases With Tied Decisions", "documentation": "Loss Contingency Number Of Cases With Tied Decisions" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfIndemnityCasesPending": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfIndemnityCasesPending", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loss contingency number of indemnity cases pending", "label": "Loss Contingency Number Of Indemnity Cases Pending", "documentation": "Loss contingency number of indemnity cases pending." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfJudgementsAffirmed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfJudgementsAffirmed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of judgements affirmed", "label": "Loss Contingency Number Of Judgements Affirmed", "documentation": "Loss Contingency Number Of Judgements Affirmed" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfPaidJudgementsCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfPaidJudgementsCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of paid judgements cases", "label": "Loss Contingency Number Of Paid Judgements Cases", "documentation": "Loss contingency number of paid judgements cases." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfPlaintiffsInCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfPlaintiffsInCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of plaintiffs, loss contingency", "label": "Loss Contingency Number Of Plaintiffs In Cases", "documentation": "Loss contingency number of plaintiffs in cases." } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfPunitiveDamagesRetrials": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfPunitiveDamagesRetrials", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of retrials", "label": "Loss Contingency Number Of Punitive Damages Retrials", "documentation": "Loss Contingency Number Of Punitive Damages Retrials" } } }, "auth_ref": [] }, "bti_LossContingencyNumberOfTrials": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossContingencyNumberOfTrials", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Loss contingency, number of trials", "label": "Loss Contingency Number Of Trials", "documentation": "Loss contingency number of trials." } } }, "auth_ref": [] }, "ifrs-full_LossesOnChangeInFairValueOfDerivatives": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LossesOnChangeInFairValueOfDerivatives", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Losses on change in fair value of derivatives", "label": "Losses on change in fair value of derivatives" } }, "en": { "role": { "documentation": "The losses resulting from changes in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]" } } }, "auth_ref": [ "r585" ] }, "ifrs-full_LossesOnLitigationSettlements": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "LossesOnLitigationSettlements", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Losses on litigation settlements", "verboseLabel": "Settlement expense", "label": "Losses on litigation settlements" } }, "en": { "role": { "documentation": "The losses on settlements of litigation." } } }, "auth_ref": [ "r60" ] }, "bti_LossesOnLitigationSettlementsAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossesOnLitigationSettlementsAxis", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Losses On Litigation Settlements", "label": "Losses On Litigation Settlements [Axis]", "documentation": "Losses on litigation settlements." } } }, "auth_ref": [] }, "bti_LossesOnLitigationSettlementsDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "LossesOnLitigationSettlementsDomain", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Losses On Litigation Settlements [Domain]", "label": "Losses On Litigation Settlements [Domain]", "documentation": "Losses On Litigation Settlements [Domain]" } } }, "auth_ref": [] }, "stpr_MA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "MA", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Massachusetts", "label": "MASSACHUSETTS" } } }, "auth_ref": [] }, "stpr_MN": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "MN", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "MINNESOTA", "label": "MINNESOTA" } } }, "auth_ref": [] }, "bti_MSAAndStateSettlementAgreementsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MSAAndStateSettlementAgreementsMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Master settlement agreement and state settlement agreements", "label": "MSA And State Settlement Agreements [Member]", "documentation": "Master Settlement Agreement and State Settlement Agreements." } } }, "auth_ref": [] }, "country_MY": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "MY", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Malaysia", "label": "MALAYSIA" } } }, "auth_ref": [] }, "currency_MZN": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "MZN", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Mozambique, Meticais", "label": "Mozambique, Meticais" } } }, "auth_ref": [] }, "ifrs-full_MachineryMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MachineryMember", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Machinery", "label": "Machinery [member]" } }, "en": { "role": { "documentation": "This member stands for a class of property, plant and equipment representing long-lived, depreciable machinery used in operations. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r394" ] }, "bti_MacroEconomicFactorsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MacroEconomicFactorsMember", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Macro-economic", "label": "Macro-Economic Factors [Member]", "documentation": "Macro-Economic Factors" } } }, "auth_ref": [] }, "ifrs-full_MajorComponentsOfTaxExpenseIncomeAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MajorComponentsOfTaxExpenseIncomeAbstract", "lang": { "en-us": { "role": { "label": "Major components of tax expense (income) [abstract]" } } }, "auth_ref": [] }, "bti_MajorComponentsOfTaxExpenseIncomeLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MajorComponentsOfTaxExpenseIncomeLineItems", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofTaxationonOrdinaryActivitiesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Major Components Of Tax Expense Income [Line Items]", "label": "Major Components Of Tax Expense Income [Line Items]", "documentation": "Major components of tax expense income." } } }, "auth_ref": [] }, "ifrs-full_MajorOrdinaryShareTransactionsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MajorOrdinaryShareTransactionsMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ordinary share", "label": "Major ordinary share transactions [member]" } }, "en": { "role": { "documentation": "This member stands for major ordinary share transactions. [Refer: Ordinary shares [member]]" } } }, "auth_ref": [ "r388" ] }, "ifrs-full_MajorPurchasesOfAssetsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MajorPurchasesOfAssetsMember", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Major purchases of assets [member]", "label": "Major purchases of assets [member]" } }, "en": { "role": { "documentation": "This member stands for major purchases of assets." } } }, "auth_ref": [ "r387" ] }, "bti_MalawiGroupMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MalawiGroupMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Malawi group", "label": "Malawi Group [Member]", "documentation": "Malawi group." } } }, "auth_ref": [] }, "bti_ManagementBoardMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ManagementBoardMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Management Board", "label": "Management Board [Member]", "documentation": "Management board." } } }, "auth_ref": [] }, "bti_MarchTwoThousandAndTwentyFiveToMarchTwoThousandAndTwentySixMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MarchTwoThousandAndTwentyFiveToMarchTwoThousandAndTwentySixMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "March 2025 - March 2026", "label": "March Two Thousand And Twenty Five To March Two Thousand And Twenty Six [Member]", "documentation": "March 2025 to March 2026." } } }, "auth_ref": [] }, "bti_MarchTwoThousandAndTwentyFourMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MarchTwoThousandAndTwentyFourMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "March 2024", "label": "March Two Thousand And Twenty Four [Member]", "documentation": "March Two Thousand And Twenty Four" } } }, "auth_ref": [] }, "bti_MarchTwoThousandAndTwentySixToMarchTwoThousandAndTwentySevenMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MarchTwoThousandAndTwentySixToMarchTwoThousandAndTwentySevenMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "March 2026 - March 2027", "label": "March Two Thousand And Twenty Six To March Two Thousand And Twenty Seven [Member]", "documentation": "March 2026 to March 2027." } } }, "auth_ref": [] }, "bti_MarchTwoThousandAndTwentyThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MarchTwoThousandAndTwentyThreeMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "March 2023", "label": "March Two Thousand And Twenty Three [Member]", "documentation": "March Two Thousand And Twenty Three" } } }, "auth_ref": [] }, "ifrs-full_MarketComparablePricesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MarketComparablePricesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Quoted Market Prices", "label": "Market comparable prices [member]" } }, "en": { "role": { "documentation": "This member stands for a specific valuation technique consistent with the market approach that involves analysing inputs from comparable prices (for example, price per square metre) in the current market. [Refer: Market approach [member]]" } } }, "auth_ref": [ "r430", "r433" ] }, "bti_MarvinManiousV.R.J.ReynoldsTobaccoCo.CaseMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MarvinManiousV.R.J.ReynoldsTobaccoCo.CaseMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Marvin Manious v. R. J. Reynolds Tobacco Co. case", "label": "Marvin Manious v. R. J. Reynolds Tobacco Co. case [Member]", "documentation": "Marvin Manious v. R. J. Reynolds Tobacco Co. case" } } }, "auth_ref": [] }, "bti_MasterSettlementAgreementLiability": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MasterSettlementAgreementLiability", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "periodStartLabel": "Opening MSA liability", "periodEndLabel": "Closing MSA liability", "terseLabel": "Master settlement agreement (U.S.)", "label": "Master Settlement Agreement Liability", "documentation": "Master Settlement Agreement Liability" } } }, "auth_ref": [] }, "bti_MasterSettlementAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MasterSettlementAgreementMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Master settlement agreement", "label": "Master Settlement Agreement [Member]", "documentation": "Master settlement agreement." } } }, "auth_ref": [] }, "ifrs-full_MaturityAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MaturityAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maturity [axis]", "label": "Maturity [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r27", "r237", "r247", "r249", "r250", "r251", "r252", "r259", "r292", "r318", "r402", "r450" ] }, "ifrs-full_MaturityDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MaturityDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maturity [domain]", "label": "Maturity [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated time bands. It also represents the standard value for the 'Maturity' axis if no other member is used." } } }, "auth_ref": [ "r27", "r237", "r247", "r249", "r250", "r251", "r252", "r259", "r292", "r402", "r450", "r453" ] }, "bti_MaximumAllocatedIndividualPretaxSalary": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumAllocatedIndividualPretaxSalary", "crdr": "debit", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maximum amount allocated to purchase shares", "label": "Maximum Allocated Individual Pretax Salary", "documentation": "Maximum allocated individual pretax salary." } } }, "auth_ref": [] }, "bti_MaximumAmountOfFreeSharesThatCanBeGranted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumAmountOfFreeSharesThatCanBeGranted", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maximum amount of free shares that can be granted", "label": "Maximum Amount Of Free Shares That Can Be Granted", "documentation": "Maximum amount of free shares that can be granted." } } }, "auth_ref": [] }, "ifrs-full_MaximumExposureToCreditRisk": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MaximumExposureToCreditRisk", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maximum exposure to credit risk", "label": "Maximum exposure to credit risk" } }, "en": { "role": { "documentation": "The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]" } } }, "auth_ref": [ "r312" ] }, "srt_MaximumMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "MaximumMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maximum", "label": "Maximum [Member]", "documentation": "Upper limit of the provided range." } } }, "auth_ref": [ "r352", "r354", "r356", "r357", "r359", "r375", "r376" ] }, "bti_MaximumPercentageOfInvestmentsHeldAtFairValueDenominatedInOtherThanFunctionalCurrenciesOfSubsidiary": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumPercentageOfInvestmentsHeldAtFairValueDenominatedInOtherThanFunctionalCurrenciesOfSubsidiary", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of investments held at fair value denominated in other than the functional currency of the subsidiary", "label": "Maximum Percentage Of Investments Held At Fair Value Denominated In Other Than Functional Currencies Of Subsidiary", "documentation": "Maximum percentage of investments held at fair value denominated in other than functional currencies of subsidiary." } } }, "auth_ref": [] }, "bti_MaximumPercentageOfTradeAndOtherPayablesDenominatedInOtherThanFunctionalCurrencyOfSubsidiary": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumPercentageOfTradeAndOtherPayablesDenominatedInOtherThanFunctionalCurrencyOfSubsidiary", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of trade and other payables denominated in other than the functional currency of the subsidiary", "label": "Maximum Percentage Of Trade And Other Payables Denominated In Other Than Functional Currency Of Subsidiary", "documentation": "Maximum percentage of trade and other payables denominated in other than the functional currency of the subsidiary." } } }, "auth_ref": [] }, "bti_MaximumSavingsByPlanParticipantInAnyTaxYear": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumSavingsByPlanParticipantInAnyTaxYear", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Maximum savings by participant to buy shares in any tax year", "label": "Maximum Savings By Plan Participant In Any Tax Year", "documentation": "Maximum savings by plan participant in any tax year." } } }, "auth_ref": [] }, "bti_MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MaximumTermOfOptionsGrantedForShareBasedPaymentArrangement", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Expiration period", "label": "Maximum Term Of Options Granted For Share-Based Payment Arrangement", "documentation": "Maximum Term Of Options Granted For Share-Based Payment Arrangement" } } }, "auth_ref": [] }, "ecd_MeasureAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "MeasureAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Measure [Axis]", "terseLabel": "Measure:" } } }, "auth_ref": [ "r523" ] }, "ecd_MeasureName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "MeasureName", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Measure Name", "terseLabel": "Name" } } }, "auth_ref": [ "r523" ] }, "ifrs-full_MeasurementAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MeasurementAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Measurement [axis]", "label": "Measurement [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r181", "r185", "r230" ] }, "ifrs-full_MeasurementDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MeasurementDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Measurement", "label": "Measurement [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of measurement. It also represents the standard value for the 'Measurement' axis if no other member is used." } } }, "auth_ref": [ "r181", "r185", "r230" ] }, "bti_MeasurementOfFairValueAsPercentageShareOptionsGranted": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MeasurementOfFairValueAsPercentageShareOptionsGranted", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of grant", "label": "Measurement Of Fair Value As Percentage Share Options Granted", "documentation": "Measurement of fair value as percentage share options granted." } } }, "auth_ref": [] }, "bti_MedicalReimbursementCasesNonUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MedicalReimbursementCasesNonUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Medical reimbursement cases, Non-US tobacco related", "label": "Medical Reimbursement Cases Non U S Tobacco Related [Member]", "documentation": "Medical reimbursement cases, Non-US tobacco related." } } }, "auth_ref": [] }, "bti_MedicalReimbursementCasesUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MedicalReimbursementCasesUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Medical reimbursement cases", "label": "Medical Reimbursement Cases U S Tobacco Related [Member]", "documentation": "Medical reimbursement cases US tobacco related." } } }, "auth_ref": [] }, "bti_MediumTermFacilityMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MediumTermFacilityMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Medium-Term Facility", "label": "Medium-Term Facility [Member]", "documentation": "Medium-Term Facility" } } }, "auth_ref": [] }, "ifrs-full_Merchandise": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Merchandise", "crdr": "debit", "calculation": { "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails": { "parentTag": "ifrs-full_Inventories", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/InventoriesSummaryofInventoriesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Goods purchased for resale", "label": "Current merchandise" } }, "en": { "role": { "documentation": "A classification of current inventory representing the amount of goods acquired for resale. [Refer: Inventories]" } } }, "auth_ref": [ "r383", "r604" ] }, "ifrs-full_MergerReserveMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MergerReserveMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Merger reserves", "label": "Merger reserve [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity that may result in relation to a business combination outside the scope of IFRS 3." } } }, "auth_ref": [ "r577" ] }, "ifrs-full_MethodsOfGenerationAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MethodsOfGenerationAxis", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Methods of generation [axis]", "label": "Methods of generation [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r172" ] }, "ifrs-full_MethodsOfGenerationDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MethodsOfGenerationDomain", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Methods of generation [domain]", "label": "Methods of generation [domain]" } }, "en": { "role": { "documentation": "This member stands for all methods of generation. It also represents the standard value for the 'Methods of generation' axis if no other member is used." } } }, "auth_ref": [ "r172" ] }, "srt_MinimumMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "MinimumMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Minimum", "label": "Minimum [Member]", "documentation": "Lower limit of the provided range." } } }, "auth_ref": [ "r352", "r354", "r356", "r357", "r359", "r375", "r376" ] }, "bti_MinnesotaTobaccoSettlementAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MinnesotaTobaccoSettlementAgreementMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Minnesota tobacco settlement agreement", "label": "Minnesota Tobacco Settlement Agreement [Member]", "documentation": "Minnesota Tobacco Settlement Agreement" } } }, "auth_ref": [] }, "ifrs-full_MiscellaneousOtherOperatingExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MiscellaneousOtherOperatingExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Miscellaneous other operating expense", "label": "Miscellaneous other operating expense" } }, "en": { "role": { "documentation": "The amount of miscellaneous other operating expenses. [Refer: Other operating income (expense)]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_MiscellaneousOtherProvisionsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MiscellaneousOtherProvisionsMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other provisions", "label": "Miscellaneous other provisions [member]" } }, "en": { "role": { "documentation": "This member stands for miscellaneous other provisions. [Refer: Classes of other provisions [domain]]" } } }, "auth_ref": [ "r162" ] }, "bti_MiscellaneousOtherProvisionsNettingMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MiscellaneousOtherProvisionsNettingMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net other provisions", "label": "Miscellaneous Other Provisions, Netting [Member]", "documentation": "Miscellaneous Other Provisions, Netting" } } }, "auth_ref": [] }, "ifrs-full_MiscellaneousOtherReservesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "MiscellaneousOtherReservesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Miscellaneous other reserves [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing miscellaneous reserves that the entity does not separately disclose in the same statement or note. [Refer: Other reserves [member]]" } } }, "auth_ref": [ "r577" ] }, "bti_MississippiSettlementAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MississippiSettlementAgreementMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Mississippi settlement agreement", "label": "Mississippi Settlement Agreement [Member]", "documentation": "Mississippi settlement agreement." } } }, "auth_ref": [] }, "ecd_MnpiDiscTimedForCompValFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "MnpiDiscTimedForCompValFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "MNPI Disclosure Timed for Compensation Value [Flag]", "terseLabel": "MNPI Disclosure Timed for Compensation Value" } } }, "auth_ref": [ "r543" ] }, "bti_ModernOralMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ModernOralMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Modern Oral", "label": "Modern Oral [Member]", "documentation": "Modern oral." } } }, "auth_ref": [] }, "bti_MoneyMarketFundMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MoneyMarketFundMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Money Market fund", "label": "Money Market Fund [Member]", "documentation": "Money market fund." } } }, "auth_ref": [] }, "bti_MonitorshipPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MonitorshipPeriod", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOthercontingenciesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Monitorship period", "label": "Monitorship Period", "documentation": "Monitorship Period" } } }, "auth_ref": [] }, "bti_MotifLabsLtdMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MotifLabsLtdMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Motif Labs Ltd", "label": "Motif Labs Ltd [Member]", "documentation": "Motif Labs Ltd" } } }, "auth_ref": [] }, "bti_MozambicanIPLitigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "MozambicanIPLitigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Mozambican IP litigation", "label": "Mozambican I P Litigation [Member]", "documentation": "Mozambican IP litigation." } } }, "auth_ref": [] }, "ecd_MtrlTermsOfTrdArrTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "MtrlTermsOfTrdArrTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Material Terms of Trading Arrangement [Text Block]", "terseLabel": "Material Terms of Trading Arrangement" } } }, "auth_ref": [ "r551" ] }, "stpr_NC": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "NC", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "NORTH CAROLINA", "label": "NORTH CAROLINA" } } }, "auth_ref": [] }, "bti_NCRAndAppvionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NCRAndAppvionMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "NCR and Appvion", "label": "N C R And Appvion [Member]", "documentation": "NCR and Appvion." } } }, "auth_ref": [] }, "bti_NCRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NCRMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "N C R", "label": "NCR [Member]", "documentation": "NCR." } } }, "auth_ref": [] }, "currency_NGN": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "NGN", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nigeria, Nairas", "label": "Nigeria, Nairas" } } }, "auth_ref": [] }, "country_NL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "NL", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Netherlands", "label": "NETHERLANDS" } } }, "auth_ref": [] }, "stpr_NM": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "NM", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New Mexico", "label": "NEW MEXICO" } } }, "auth_ref": [] }, "bti_NPMAdjustmentSettlementAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NPMAdjustmentSettlementAgreementMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "N P M adjustment settlement agreement", "label": "N P M Adjustment Settlement Agreement [Member]", "documentation": "NPM adjustment settlement agreement." } } }, "auth_ref": [] }, "stpr_NY": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "NY", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New York", "label": "NEW YORK" } } }, "auth_ref": [] }, "ecd_NamedExecutiveOfficersFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NamedExecutiveOfficersFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Named Executive Officers, Footnote [Text Block]", "terseLabel": "Named Executive Officers, Footnote" } } }, "auth_ref": [ "r524" ] }, "bti_NationalBoardOfRevenueNBRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NationalBoardOfRevenueNBRMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "National Board Of Revenue (NBR)", "label": "National Board Of Revenue (NBR) [Member]", "documentation": "National Board Of Revenue (NBR)" } } }, "auth_ref": [] }, "bti_NationalHealthInsuranceServiceMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NationalHealthInsuranceServiceMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "National Health Insurance Service", "label": "National Health Insurance Service [Member]", "documentation": "National Health Insurance Service." } } }, "auth_ref": [] }, "bti_NaturalAmericanSpiritMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NaturalAmericanSpiritMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Natural American Spirit", "label": "Natural American Spirit [Member]", "documentation": "Natural American Spirit" } } }, "auth_ref": [] }, "bti_NatureOfWriteDownAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NatureOfWriteDownAxis", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nature Of Write Down [Axis]", "label": "Nature Of Write Down [Axis]", "documentation": "Nature Of Write Down" } } }, "auth_ref": [] }, "bti_NatureOfWriteDownDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NatureOfWriteDownDomain", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nature Of Write Down [Domain]", "label": "Nature Of Write Down [Domain]", "documentation": "Nature Of Write Down [Domain]" } } }, "auth_ref": [] }, "bti_NetAmountAgainstVerdicts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetAmountAgainstVerdicts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net amount against verdicts", "label": "Net Amount Against Verdicts", "documentation": "Net amount against verdicts." } } }, "auth_ref": [] }, "bti_NetAmountAssetsLiabilitiesAfterOffset": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetAmountAssetsLiabilitiesAfterOffset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net amount", "label": "Net Amount Assets Liabilities After Offset", "documentation": "Net amount assets liabilities after offset." } } }, "auth_ref": [] }, "ifrs-full_NetAssetsLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetAssetsLiabilities", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net assets (liabilities)", "label": "Assets (liabilities)" } }, "en": { "role": { "documentation": "The amount of assets less the amount of liabilities." } } }, "auth_ref": [ "r425", "r578" ] }, "ifrs-full_NetAssetsLiabilitiesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetAssetsLiabilitiesAbstract", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Summary net assets:", "label": "Net assets (liabilities) [abstract]" } } }, "auth_ref": [] }, "bti_NetAssetsLiabilitiesClassifiedAsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetAssetsLiabilitiesClassifiedAsHeldForSale", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net assets classified as held for sale", "label": "Net Assets (Liabilities) Classified As Held For Sale", "documentation": "Net Assets (Liabilities) Classified As Held For Sale" } } }, "auth_ref": [] }, "ifrs-full_NetDebt": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetDebt", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net debt", "periodStartLabel": "Net debt, Opening balance", "periodEndLabel": "Net debt, Closing balance", "label": "Net debt" } }, "en": { "role": { "documentation": "The amount of net debt of the entity." } } }, "auth_ref": [ "r578" ] }, "bti_NetDebtAdjustmentOnAssetsHeldForSale": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetDebtAdjustmentOnAssetsHeldForSale", "crdr": "debit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Held for Sale", "label": "Net Debt Adjustment On Assets Held For Sale", "documentation": "Net Debt Adjustment On Assets Held For Sale" } } }, "auth_ref": [] }, "bti_NetDebtAdjustmentOnCashFlow": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetDebtAdjustmentOnCashFlow", "crdr": "debit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flows per net debt statement", "label": "Net Debt Adjustment On Cash Flow", "documentation": "Net debt, adjustment on cash flow." } } }, "auth_ref": [] }, "bti_NetDebtAdjustmentOnFairValueAccruedInterestAndOther": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetDebtAdjustmentOnFairValueAccruedInterestAndOther", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value, accrued interest and other", "label": "Net Debt Adjustment On Fair Value Accrued Interest And Other", "documentation": "Net debt adjustment on fair value, accrued interest and other." } } }, "auth_ref": [] }, "bti_NetDebtAdjustmentOnForeignExchange": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetDebtAdjustmentOnForeignExchange", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Foreign exchange", "label": "Net Debt Adjustment On Foreign Exchange", "documentation": "Net debt adjustment on foreign exchange." } } }, "auth_ref": [] }, "ifrs-full_NetDeferredTaxAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetDeferredTaxAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net deferred tax assets", "label": "Net deferred tax assets" } }, "en": { "role": { "documentation": "The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities]" } } }, "auth_ref": [ "r588" ] }, "ifrs-full_NetDefinedBenefitLiabilityAssetAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetDefinedBenefitLiabilityAssetAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net defined benefit liability (asset) [axis]", "label": "Net defined benefit liability (asset) [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r88" ] }, "ifrs-full_NetDefinedBenefitLiabilityAssetDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetDefinedBenefitLiabilityAssetDomain", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net defined benefit liability (asset)", "label": "Net defined benefit liability (asset) [domain]" } }, "en": { "role": { "documentation": "This member stands for the net defined benefit liability (asset). It also represents the standard value for the 'Net defined benefit liability (asset)' axis if no other member is used. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r88" ] }, "bti_NetFinanceCostsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetFinanceCostsAbstract", "lang": { "en-us": { "role": { "label": "Net Finance Costs [Abstract]", "documentation": "Net finance costs." } } }, "auth_ref": [] }, "ifrs-full_NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Net amount", "label": "Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements" } }, "en": { "role": { "documentation": "The amount remaining after deducting the amounts subject to an enforceable master netting arrangement or similar agreement that were not set off against financial assets, from the net amount of financial assets subject to offsetting or subject to an enforceable master netting arrangement or similar agreement presented in the statement of financial position." } } }, "auth_ref": [ "r289" ] }, "ifrs-full_NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NetFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementSummaryofDerivativeFinancialAssetandLiabilitiesOffsettingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount presented in the Group balance sheet", "label": "Net financial assets subject to offsetting, enforceable master netting arrangements or similar agreements in statement of financial position" } }, "en": { "role": { "documentation": "The net amount of financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial assets]" } } }, "auth_ref": [ "r288" ] }, "us-gaap_NetIncomeLoss": { "xbrltype": "monetaryItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "NetIncomeLoss", "crdr": "credit", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Net Income (Loss)", "terseLabel": "Net Income (Loss)" } } }, "auth_ref": [] }, "bti_NetOperatingProfitsClaimingDamages": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetOperatingProfitsClaimingDamages", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net operating profits claiming damages", "label": "Net Operating Profits Claiming Damages", "documentation": "Net operating profits claiming damages." } } }, "auth_ref": [] }, "bti_NetSettledMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetSettledMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net settled", "label": "Net Settled [Member]", "documentation": "Net settled." } } }, "auth_ref": [] }, "bti_NetTurnoverMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NetTurnoverMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net Turnover", "label": "Net Turnover [Member]", "documentation": "Net turnover." } } }, "auth_ref": [] }, "bti_NewCategoriesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NewCategoriesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New Categories", "label": "New Categories [Member]", "documentation": "New categories." } } }, "auth_ref": [] }, "bti_NewCategoriesRevenueGrowthMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NewCategoriesRevenueGrowthMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New Categories Revenue Growth", "label": "New Categories Revenue Growth [Member]", "documentation": "New Categories Revenue Growth" } } }, "auth_ref": [] }, "bti_NewLeaseLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NewLeaseLiabilitiesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "New Lease Liabilities", "label": "New Lease Liabilities [Member]", "documentation": "New Lease Liabilities" } } }, "auth_ref": [] }, "ifrs-full_NewProvisionsOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NewProvisionsOtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Charges in respect of DOJ and OFAC investigation*", "label": "New provisions, other provisions" } }, "en": { "role": { "documentation": "The amount recognised for new other provisions. [Refer: Other provisions]" } } }, "auth_ref": [ "r607" ] }, "bti_NewportCamelNaturalAmericanSpiritPallMallMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NewportCamelNaturalAmericanSpiritPallMallMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total", "label": "Newport, Camel, Natural American Spirit & Pall Mall [Member]", "documentation": "Newport, Camel, Natural American Spirit & Pall Mall" } } }, "auth_ref": [] }, "bti_NewportMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NewportMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Newport", "label": "Newport [Member]", "documentation": "Newport." } } }, "auth_ref": [] }, "bti_NigerianCourtMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NigerianCourtMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nigerian court", "label": "Nigerian Court [Member]", "documentation": "Nigerian court." } } }, "auth_ref": [] }, "bti_NoExpiryPeriodMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NoExpiryPeriodMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "No expiry date", "label": "No Expiry Period [Member]", "documentation": "No expiry period." } } }, "auth_ref": [] }, "ifrs-full_NominalAmountOfHedgingInstrument": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NominalAmountOfHedgingInstrument", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nominal amount of hedging instrument", "label": "Nominal amount of hedging instrument" } }, "en": { "role": { "documentation": "The nominal amount of a hedging instrument. [Refer: Hedging instruments [domain]]" } } }, "auth_ref": [ "r292", "r295" ] }, "bti_NonCollectionAgentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonCollectionAgentMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non collection agent", "label": "Non Collection Agent [Member]", "documentation": "Non collection agent." } } }, "auth_ref": [] }, "bti_NonControllingInterestPercentageAcquired": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonControllingInterestPercentageAcquired", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "NCI percentage acquired", "label": "Non Controlling Interest Percentage Acquired", "documentation": "Non controlling interest percentage acquired." } } }, "auth_ref": [] }, "bti_NonDerivativeRelatedNetInvestmentHedgesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonDerivativeRelatedNetInvestmentHedgesMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Net investment hedges (non-derivative related)", "label": "Non Derivative Related Net Investment Hedges [Member]", "documentation": "Non derivative related net investment hedges." } } }, "auth_ref": [] }, "bti_NonExecutiveDirectorsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonExecutiveDirectorsMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-Executive Directors", "label": "Non Executive Directors [Member]", "documentation": "Non-Executive directors." } } }, "auth_ref": [] }, "bti_NonFinancingCashFlowsIncludedInNetDebt": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonFinancingCashFlowsIncludedInNetDebt", "crdr": "debit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Non-financing cash flows included in net debt", "label": "Non Financing Cash Flows Included In Net Debt", "documentation": "Non financing cash flows included in net debt." } } }, "auth_ref": [] }, "ecd_NonGaapMeasureDescriptionTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonGaapMeasureDescriptionTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Non-GAAP Measure Description [Text Block]", "terseLabel": "Non-GAAP Measure Description" } } }, "auth_ref": [ "r523" ] }, "ecd_NonNeosMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonNeosMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Non-NEOs [Member]", "terseLabel": "Non-NEOs" } } }, "auth_ref": [ "r486", "r497", "r507", "r531", "r540" ] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2003To2012Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2003To2012Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Claims related to period 2003 to 2012", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From2003 To2012 [Member]", "documentation": "Non-Participating Manufacturer (NPM) Adjustment claims related to Period from 2003 to 2012." } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2014Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2014Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Claims related to period 2004 to 2014", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From2004 To2014 [Member]", "documentation": "Non-Participating Manufacturer (NPM) Adjustment claims related to Period from 2004 to 2014." } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2017Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Claims related to period 2004 to 2017", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From2004 To2017 [Member]", "documentation": "Non participating manufacturer adjustment claims related to period from 2004 to 2017." } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2019Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Claims related to period 2004 To 2019", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From 2004 To 2019 [Member]", "documentation": "Non Participating Manufacturer Adjustment Claims Related To Period From 2004 To 2019" } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2004To2024Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Claims related to period 2004 To 2024", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From 2004 To 2024 [Member]", "documentation": "Non Participating Manufacturer Adjustment Claims Related To Period From 2004 To 2024" } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2011Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2011Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non participating manufacturer adjustment claims related to period from 2005 to 2011", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2011 [Member]", "documentation": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2011" } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2028Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2028Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non participating manufacturer adjustment claims related to period from 2005 to 2028", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2028 [Member]", "documentation": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2028" } } }, "auth_ref": [] }, "bti_NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2029Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonParticipatingManufacturerAdjustmentClaimsRelatedToPeriodFrom2005To2029Member", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non participating manufacturer adjustment claims related to period from 2005 to 2029", "label": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2029 [Member]", "documentation": "Non Participating Manufacturer Adjustment Claims Related To Period From 2005 To 2029" } } }, "auth_ref": [] }, "ecd_NonPeoNeoAvgCompActuallyPaidAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonPeoNeoAvgCompActuallyPaidAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Non-PEO NEO Average Compensation Actually Paid Amount", "terseLabel": "Non-PEO NEO Average Compensation Actually Paid Amount" } } }, "auth_ref": [ "r514" ] }, "ecd_NonPeoNeoAvgTotalCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonPeoNeoAvgTotalCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Non-PEO NEO Average Total Compensation Amount", "terseLabel": "Non-PEO NEO Average Total Compensation Amount" } } }, "auth_ref": [ "r513" ] }, "ecd_NonPeoNeoMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonPeoNeoMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Non-PEO NEO [Member]", "terseLabel": "Non-PEO NEO" } } }, "auth_ref": [ "r531" ] }, "ecd_NonRule10b51ArrAdoptedFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonRule10b51ArrAdoptedFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Non-Rule 10b5-1 Arrangement Adopted [Flag]", "terseLabel": "Non-Rule 10b5-1 Arrangement Adopted" } } }, "auth_ref": [ "r551" ] }, "ecd_NonRule10b51ArrTrmntdFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "NonRule10b51ArrTrmntdFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Non-Rule 10b5-1 Arrangement Terminated [Flag]", "terseLabel": "Non-Rule 10b5-1 Arrangement Terminated" } } }, "auth_ref": [ "r551" ] }, "bti_NonTobaccoRelatedLitigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NonTobaccoRelatedLitigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Croatian distributor dispute", "label": "Non Tobacco Related Litigation [Member]", "documentation": "Non-tobacco related litigation." } } }, "auth_ref": [] }, "ifrs-full_NonadjustingEventsAfterReportingPeriodAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NonadjustingEventsAfterReportingPeriodAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-adjusting events after reporting period [axis]", "label": "Non-adjusting events after reporting period [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r62" ] }, "ifrs-full_NonadjustingEventsAfterReportingPeriodDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NonadjustingEventsAfterReportingPeriodDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-adjusting events after reporting period [domain]", "label": "Non-adjusting events after reporting period [domain]" } }, "en": { "role": { "documentation": "This member stands for events that occur between the end of the reporting period and the date when the financial statements are authorised for issue and are indicative of conditions that arose after the reporting period. It also represents the standard value for the 'Non-adjusting events after reporting period' axis if no other member is used." } } }, "auth_ref": [ "r62" ] }, "ifrs-full_NoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncontrollingInterests", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Non-controlling interests", "label": "Non-controlling interests" } }, "en": { "role": { "documentation": "The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r21", "r205", "r207" ] }, "ifrs-full_NoncontrollingInterestsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncontrollingInterestsMember", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Non- controlling interests", "label": "Non-controlling interests [member]" } }, "en": { "role": { "documentation": "This member stands for equity in a subsidiary not attributable, directly or indirectly, to the parent." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_NoncurrentAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_Assets", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails": { "parentTag": "ifrs-full_NetAssetsLiabilities", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total non-current assets", "terseLabel": "Non-current assets", "label": "Non-current assets" } }, "en": { "role": { "documentation": "The amount of assets that do not meet the definition of current assets. [Refer: Current assets]" } } }, "auth_ref": [ "r28", "r217", "r426" ] }, "ifrs-full_NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Assets classified as held-for-sale", "label": "Non-current assets or disposal groups classified as held for sale or as held for distribution to owners" } }, "en": { "role": { "documentation": "The amount of non-current assets or disposal groups classified as held for sale or as held for distribution to owners. [Refer: Non-current assets or disposal groups classified as held for distribution to owners; Non-current assets or disposal groups classified as held for sale]" } } }, "auth_ref": [ "r16" ] }, "ifrs-full_NoncurrentDerivativeFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentDerivativeFinancialAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": "ifrs-full_DerivativeFinancialAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative financial instruments", "verboseLabel": "Derivative financial assets, Non-current", "label": "Non-current derivative financial assets" } }, "en": { "role": { "documentation": "The amount of non-current derivative financial assets. [Refer: Derivative financial assets]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_NoncurrentDerivativeFinancialLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentDerivativeFinancialLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": "ifrs-full_DerivativeFinancialLiabilities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Derivative financial instruments", "verboseLabel": "Derivative financial liabilities, Non-current", "label": "Non-current derivative financial liabilities" } }, "en": { "role": { "documentation": "The amount of non-current derivative financial liabilities. [Refer: Derivative financial liabilities]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_NoncurrentInterestPayable": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentInterestPayable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-current interest payable", "label": "Non-current interest payable" } }, "en": { "role": { "documentation": "The amount of non-current interest payable. [Refer: Interest payable]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails": { "parentTag": "ifrs-full_InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investments held at fair value", "verboseLabel": "Non-current", "label": "Non-current investments other than investments accounted for using equity method" } }, "en": { "role": { "documentation": "The amount of non-current investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method; Non-current assets; Investments other than investments accounted for using equity method]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_NoncurrentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAndLiabilities", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails": { "parentTag": "ifrs-full_NetAssetsLiabilities", "weight": -1.0, "order": 4.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total non-current liabilities", "negatedLabel": "Non-current liabilities", "terseLabel": "Non-current liabilities", "label": "Non-current liabilities" } }, "en": { "role": { "documentation": "The amount of liabilities that do not meet the definition of current liabilities. [Refer: Current liabilities]" } } }, "auth_ref": [ "r29", "r219", "r426" ] }, "ifrs-full_NoncurrentPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentPayables", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other payables", "verboseLabel": "Non-current", "label": "Trade and other non-current payables" } }, "en": { "role": { "documentation": "The amount of non-current trade payables and non-current other payables. [Refer: Other non-current payables; Non-current trade payables]" } } }, "auth_ref": [ "r17" ] }, "ifrs-full_NoncurrentProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentProvisions", "crdr": "credit", "calculation": { "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails": { "parentTag": "ifrs-full_Provisions", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other provisions for liabilities", "verboseLabel": "\u2013 non-current", "label": "Non-current provisions" } }, "en": { "role": { "documentation": "The amount of non-current provisions, including provisions for employee benefits. [Refer: Provisions]" } } }, "auth_ref": [ "r18" ] }, "ifrs-full_NoncurrentReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails": { "parentTag": "ifrs-full_TradeAndOtherReceivables", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other receivables", "verboseLabel": "Trade and other receivables, non-current", "label": "Trade and other non-current receivables" } }, "en": { "role": { "documentation": "The amount of non-current trade receivables and non-current other receivables. [Refer: Non-current trade receivables; Other non-current receivables]" } } }, "auth_ref": [ "r14", "r31" ] }, "ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentRecognisedAssetsDefinedBenefitPlan", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails": { "parentTag": "ifrs-full_SurplusDeficitInPlan", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefit assets", "label": "Non-current net defined benefit asset" } }, "en": { "role": { "documentation": "The amount of non-current net defined benefit asset. [Refer: Net defined benefit asset]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NoncurrentRecognisedLiabilitiesDefinedBenefitPlan", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails": { "parentTag": "ifrs-full_SurplusDeficitInPlan", "weight": -1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefit liabilities", "negatedTerseLabel": "Non-current net defined benefit liability", "label": "Non-current net defined benefit liability" } }, "en": { "role": { "documentation": "The amount of non-current net defined benefit liability. [Refer: Net defined benefit liability]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_NotInternallyGeneratedMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NotInternallyGeneratedMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofMovementInIntangibleAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 separately acquired", "label": "Not internally generated [member]" } }, "en": { "role": { "documentation": "This member stands for items that have not been internally generated by the entity." } } }, "auth_ref": [ "r172" ] }, "bti_NotLaterThanFiftyYearsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NotLaterThanFiftyYearsMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Not later than 50 years", "label": "Not Later Than Fifty Years [Member]", "documentation": "Not Later Than Fifty Years" } } }, "auth_ref": [] }, "ifrs-full_NotLaterThanOneYearMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NotLaterThanOneYearMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutRepaymentofBorrowingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Within one year", "verboseLabel": "Within 1 year", "label": "Not later than one year [member]" } }, "en": { "role": { "documentation": "This member stands for a time band of not later than one year." } } }, "auth_ref": [ "r25", "r247", "r249", "r259", "r450", "r455" ] }, "bti_NotLaterThanTenYearsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NotLaterThanTenYearsMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Within next 10 years", "label": "Not Later Than Ten Years [Member]", "documentation": "This member stands for a time band of not later than ten years." } } }, "auth_ref": [] }, "bti_NotLaterThanTwentyYearsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NotLaterThanTwentyYearsMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Within next 20 years", "label": "Not Later Than Twenty Years [Member]", "documentation": "Not later than twenty years." } } }, "auth_ref": [] }, "ifrs-full_NotionalAmount": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NotionalAmount", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Nominal value", "label": "Notional amount" } }, "en": { "role": { "documentation": "The nominal or face amount of a financial instrument, used to calculate payments made on that instrument." } } }, "auth_ref": [ "r578" ] }, "ifrs-full_NumberAndAverageNumberOfEmployeesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberAndAverageNumberOfEmployeesAbstract", "lang": { "en-us": { "role": { "label": "Number and average number of employees [abstract]" } } }, "auth_ref": [] }, "bti_NumberAndAverageNumberOfEmployeesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberAndAverageNumberOfEmployeesLineItems", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number and Average Number of Employees [Line Items]", "label": "Number And Average Number Of Employees [Line Items]", "documentation": "Number and average number of employees." } } }, "auth_ref": [] }, "bti_NumberAndAverageNumberOfEmployeesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberAndAverageNumberOfEmployeesTable", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number And Average Number Of Employees [Table]", "label": "Number And Average Number Of Employees [Table]", "documentation": "Number and average number of employees." } } }, "auth_ref": [] }, "bti_NumberOfActionsForRecoveryOfHealthCareCosts": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfActionsForRecoveryOfHealthCareCosts", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of actions for recovery of health care costs", "label": "Number Of Actions For Recovery Of Health Care Costs", "documentation": "Number of actions for recovery of health care costs." } } }, "auth_ref": [] }, "bti_NumberOfActiveIndividualCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfActiveIndividualCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of active individual cases", "verboseLabel": "Case numbers", "label": "Number Of Active Individual Cases", "documentation": "Number of active individual cases." } } }, "auth_ref": [] }, "bti_NumberOfAdditionalJudgementsAppealed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfAdditionalJudgementsAppealed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of additional judgments appealed", "label": "Number Of Additional Judgements Appealed", "documentation": "Number Of Additional Judgements Appealed" } } }, "auth_ref": [] }, "bti_NumberOfAffiliateEntityClaimants": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfAffiliateEntityClaimants", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of affiliate claimants", "label": "Number Of Affiliate Entity Claimants", "documentation": "Number Of Affiliate Entity Claimants" } } }, "auth_ref": [] }, "bti_NumberOfAffirmativeDefences": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfAffirmativeDefences", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of affirmative defences", "label": "Number Of Affirmative Defences", "documentation": "Number Of Affirmative Defences" } } }, "auth_ref": [] }, "bti_NumberOfAffirmativeDefencesStriking": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfAffirmativeDefencesStriking", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of affirmative defences, stiking out", "label": "Number Of Affirmative Defences, Striking", "documentation": "Number Of Affirmative Defences, Striking" } } }, "auth_ref": [] }, "bti_NumberOfBrandDescriptorsDirectedByCourtForCorrectiveCommunications": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfBrandDescriptorsDirectedByCourtForCorrectiveCommunications", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of brand descriptors directed by court for corrective communications", "label": "Number Of Brand Descriptors Directed By Court For Corrective Communications", "documentation": "Number of brand descriptors directed by court for corrective communications." } } }, "auth_ref": [] }, "bti_NumberOfCaseResolutionsPriorToTrial": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCaseResolutionsPriorToTrial", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of resolutions prior to trial", "label": "Number Of Case Resolutions Prior To Trial", "documentation": "Number Of Case Resolutions Prior To Trial" } } }, "auth_ref": [] }, "bti_NumberOfCasesCoveredBySettlement": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesCoveredBySettlement", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases covered by settlement", "label": "Number Of Cases Covered By Settlement", "documentation": "Number of cases covered by settlement." } } }, "auth_ref": [] }, "bti_NumberOfCasesForAttorneysFeesAndStatutoryInterest": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesForAttorneysFeesAndStatutoryInterest", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases for attorneys fees and statutory interest", "label": "Number Of Cases For Attorneys Fees And Statutory Interest", "documentation": "Number of cases for attorneys fees and statutory interest." } } }, "auth_ref": [] }, "bti_NumberOfCasesHaveReceivedAdverseVerdictsOrJudgments": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesHaveReceivedAdverseVerdictsOrJudgments", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases have received adverse verdicts or judgments", "label": "Number Of Cases Have Received Adverse Verdicts Or Judgments", "documentation": "Number of cases have received adverse verdicts or judgments." } } }, "auth_ref": [] }, "bti_NumberOfCasesNotCoveredBySettlement": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesNotCoveredBySettlement", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases not covered by settlement", "label": "Number Of Cases Not Covered By Settlement", "documentation": "Number of cases not covered by settlement." } } }, "auth_ref": [] }, "bti_NumberOfCasesNotCoveredBySettlementFiledByDifferentLawyer": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesNotCoveredBySettlementFiledByDifferentLawyer", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases not covered by settlement, filed by different lawyer", "label": "Number Of Cases Not Covered By Settlement Filed By Different Lawyer", "documentation": "Number of cases not covered by settlement, filed by different lawyer." } } }, "auth_ref": [] }, "bti_NumberOfCasesRemainingAfterReductionOfInitalDocket": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesRemainingAfterReductionOfInitalDocket", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases after reduction", "label": "Number Of Cases Remaining After Reduction Of Inital Docket", "documentation": "Number of cases remaining after reduction of inital docket." } } }, "auth_ref": [] }, "bti_NumberOfCasesScheduledForTrial": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCasesScheduledForTrial", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cases scheduled for trial", "label": "Number Of Cases Scheduled For Trial", "documentation": "Number of cases scheduled for trial." } } }, "auth_ref": [] }, "bti_NumberOfCashGeneratingUnitsAssessedForImpairment": { "xbrltype": "decimalItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCashGeneratingUnitsAssessedForImpairment", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cash-generating units assessed for impairment", "label": "Number Of Cash Generating Units Assessed For Impairment", "documentation": "Number of cash generating units assessed for impairment." } } }, "auth_ref": [] }, "bti_NumberOfCigaretteConsignments": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCigaretteConsignments", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of cigarette consignments", "label": "Number Of Cigarette Consignments", "documentation": "Number Of Cigarette Consignments" } } }, "auth_ref": [] }, "bti_NumberOfClaimsReceivedUnfavourableVerdicts": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfClaimsReceivedUnfavourableVerdicts", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of claims received unfavourable verdicts", "label": "Number Of Claims Received Unfavourable Verdicts", "documentation": "Number of claims received unfavourable verdicts." } } }, "auth_ref": [] }, "bti_NumberOfClassActionRaisedAllegationAgainstPlaintiffsSeekingExcessOfFiveMillionUSDollars": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfClassActionRaisedAllegationAgainstPlaintiffsSeekingExcessOfFiveMillionUSDollars", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of class action raised against plaintiffs seeking more than 5m", "label": "Number Of Class Action Raised Allegation Against Plaintiffs Seeking Excess Of Five Million U S Dollars", "documentation": "Number of class action raised allegation against plaintiffs seeking excess of US$5 million." } } }, "auth_ref": [] }, "bti_NumberOfClassActionRaisedAllegationAgainstPlaintiffsSeekingLessThanSeventyFiveThousandUSDollars": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfClassActionRaisedAllegationAgainstPlaintiffsSeekingLessThanSeventyFiveThousandUSDollars", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of class action raised against plaintiffs seeking less than 75k", "label": "Number Of Class Action Raised Allegation Against Plaintiffs Seeking Less Than Seventy Five Thousand U S Dollars", "documentation": "Number of class action raised allegation against plaintiffs seeking less than US$75,000." } } }, "auth_ref": [] }, "bti_NumberOfClassActions": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfClassActions", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of class actions", "label": "Number Of Class Actions", "documentation": "Number of class actions." } } }, "auth_ref": [] }, "bti_NumberOfClassActionsInLawsuit": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfClassActionsInLawsuit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of class actions in lawsuit", "label": "Number Of Class Actions In Lawsuit", "documentation": "Number of actions in lawsuit." } } }, "auth_ref": [] }, "bti_NumberOfConsumerLiabilityCasePending": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfConsumerLiabilityCasePending", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total number of tobacco product liability case", "label": "Number Of Consumer Liability Case Pending", "documentation": "Number of consumer liability case pending." } } }, "auth_ref": [] }, "bti_NumberOfCounterclaims": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCounterclaims", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of counterclaims", "label": "Number Of Counterclaims", "documentation": "Number Of Counterclaims" } } }, "auth_ref": [] }, "bti_NumberOfCounterclaimsDismissed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfCounterclaimsDismissed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of counterclaims, dismissed", "label": "Number Of Counterclaims, Dismissed", "documentation": "Number Of Counterclaims, Dismissed" } } }, "auth_ref": [] }, "ifrs-full_NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForFinancialLiabilitiesThatArePartOfSupplierFinanceArrangements": { "xbrltype": "durationItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForFinancialLiabilitiesThatArePartOfSupplierFinanceArrangements", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade payables part of the arrangement", "label": "Number of days between invoice date and payment due date for financial liabilities that are part of supplier finance arrangements" } }, "en": { "role": { "documentation": "The number of days between invoice date and payment due date for financial liabilities that are part of a supplier finance arrangement." } } }, "auth_ref": [ "r197" ] }, "ifrs-full_NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForTradePayablesThatAreNotPartOfSupplierFinanceArrangements": { "xbrltype": "durationItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfDaysBetweenInvoiceDateAndPaymentDueDateForTradePayablesThatAreNotPartOfSupplierFinanceArrangements", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade payables that are not part of the arrangement", "label": "Number of days between invoice date and payment due date for trade payables that are not part of supplier finance arrangements" } }, "en": { "role": { "documentation": "The number of days between invoice date and payment due date for comparable trade payables that are not part of a supplier finance arrangement." } } }, "auth_ref": [ "r197" ] }, "bti_NumberOfDirectorsEntitledToBeAppointedInTheAcquireeCompany": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfDirectorsEntitledToBeAppointedInTheAcquireeCompany", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of directors entitled to be appointed in the acquiree", "label": "Number Of Directors Entitled To Be Appointed In The Acquiree Company", "documentation": "Number of directors entitled to be appointed in the acquiree company." } } }, "auth_ref": [] }, "bti_NumberOfDistrictCourtsFiledClassActionsCases": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfDistrictCourtsFiledClassActionsCases", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of district courts filed class actions cases", "label": "Number Of District Courts Filed Class Actions Cases", "documentation": "Number of district courts fled class actions cases." } } }, "auth_ref": [] }, "bti_NumberOfDomesticManufacturersPartyToLitigation": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfDomesticManufacturersPartyToLitigation", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Domestic manufacturers party to litigation", "label": "Number Of Domestic Manufacturers Party To Litigation", "documentation": "Number Of Domestic Manufacturers Party To Litigation" } } }, "auth_ref": [] }, "bti_NumberOfExtensionOptions": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfExtensionOptions", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of extension options", "label": "Number Of Extension Options", "documentation": "Number Of Extension Options" } } }, "auth_ref": [] }, "bti_NumberOfFarmerClaimants": { "xbrltype": "decimalItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfFarmerClaimants", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of farmer claimants", "label": "Number Of Farmer Claimants", "documentation": "Number of farmer claimants." } } }, "auth_ref": [] }, "bti_NumberOfFormerEmployeesChargedWithCorruption": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfFormerEmployeesChargedWithCorruption", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of employees", "label": "Number Of Former Employees Charged With Corruption", "documentation": "Number Of Former Employees Charged With Corruption" } } }, "auth_ref": [] }, "bti_NumberOfIndividualCasesIsBroughtByOrOnBehalfOfAnIndividualSurvivorsAllegingPersonalInjuryAsResultOfExposureToETS": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfIndividualCasesIsBroughtByOrOnBehalfOfAnIndividualSurvivorsAllegingPersonalInjuryAsResultOfExposureToETS", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of individual cases is brought by or on behalf of an individual survivors alleging personal injury as result of exposure to ETS", "label": "Number Of Individual Cases Is Brought By Or On Behalf Of An Individual Survivors Alleging Personal Injury As Result Of Exposure To E T S", "documentation": "Number of individual cases is brought by or on behalf of an individual survivors alleging personal injury as result of exposure to ETS." } } }, "auth_ref": [] }, "ifrs-full_NumberOfInstrumentsThatAreAntidilutiveInPeriodPresented": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfInstrumentsThatAreAntidilutiveInPeriodPresented", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of shares that are antidilutive in period presented (in shares)", "label": "Number of instruments that are antidilutive in period presented" } }, "en": { "role": { "documentation": "Number of (units of) instruments that are antidilutive in the period presented." } } }, "auth_ref": [ "r139" ] }, "bti_NumberOfInsurersPartyToBuyInAgreement": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfInsurersPartyToBuyInAgreement", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Insurers party to agreement", "label": "Number Of Insurers Party To Buy-In Agreement", "documentation": "Number Of Insurers Party To Buy-In Agreement" } } }, "auth_ref": [] }, "bti_NumberOfInvestmentsCompleted": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfInvestmentsCompleted", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of investments completed", "label": "Number Of Investments Completed", "documentation": "Number Of Investments Completed" } } }, "auth_ref": [] }, "bti_NumberOfJudgementsAppealed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfJudgementsAppealed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of adverse judgments appealed", "label": "Number Of Judgements Appealed", "documentation": "Number Of Judgements Appealed" } } }, "auth_ref": [] }, "bti_NumberOfJudgementsStillHavingTimeForAppeal": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfJudgementsStillHavingTimeForAppeal", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of adverse judgments, still has time to file an appeal", "label": "Number Of Judgements Still Having Time For Appeal", "documentation": "Number Of Judgements Still Having Time For Appeal" } } }, "auth_ref": [] }, "bti_NumberOfJudgementsThatCannotBeAppealed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfJudgementsThatCannotBeAppealed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of adverse judgments in which an appeal was not, and can no longer be, sought", "label": "Number Of Judgements That Cannot Be Appealed", "documentation": "Number Of Judgements That Cannot Be Appealed" } } }, "auth_ref": [] }, "bti_NumberOfJudges": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfJudges", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of judges", "label": "Number Of Judges", "documentation": "Number Of Judges" } } }, "auth_ref": [] }, "bti_NumberOfMarkets": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfMarkets", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of markets outside US", "label": "Number Of Markets", "documentation": "Number of markets." } } }, "auth_ref": [] }, "ifrs-full_NumberOfOutstandingShareOptions": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfOutstandingShareOptions", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Number of options outstanding (in shares)", "periodStartLabel": "Number of options, Outstanding at start of year (in shares)", "periodEndLabel": "Number of options, Outstanding at end of year (in shares)", "label": "Number of share options outstanding in share-based payment arrangement" } }, "en": { "role": { "documentation": "The number of share options outstanding in a share-based payment arrangement." } } }, "auth_ref": [ "r262", "r266", "r268" ] }, "bti_NumberOfParticipantsInLitigation": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfParticipantsInLitigation", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of corporate groups in FII GLO", "label": "Number Of Participants In Litigation", "documentation": "Number of participants in litigation." } } }, "auth_ref": [] }, "bti_NumberOfPatentClaimsAsserted": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPatentClaimsAsserted", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of patents asserted", "label": "Number Of Patent Claims Asserted", "documentation": "Number Of Patent Claims Asserted" } } }, "auth_ref": [] }, "bti_NumberOfPatentClaimsAssertedDropped": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPatentClaimsAssertedDropped", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of patents asserted dropped", "label": "Number Of Patent Claims Asserted Dropped", "documentation": "Number Of Patent Claims Asserted Dropped" } } }, "auth_ref": [] }, "bti_NumberOfPatentsInfringed": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPatentsInfringed", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of patents infringed", "label": "Number Of Patents Infringed", "documentation": "Number Of Patents Infringed" } } }, "auth_ref": [] }, "bti_NumberOfPayments": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPayments", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of payments", "label": "Number Of Payments", "documentation": "Number Of Payments" } } }, "auth_ref": [] }, "bti_NumberOfPerpetualHybridBondsIssued": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPerpetualHybridBondsIssued", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of perpetual hybrid bonds issued", "label": "Number Of Perpetual Hybrid Bonds Issued", "documentation": "Number of perpetual hybrid bonds issued." } } }, "auth_ref": [] }, "bti_NumberOfPersonalInjuryClaims": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPersonalInjuryClaims", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of personal injury claims", "label": "Number Of Personal Injury Claims", "documentation": "Number of personal injury claims." } } }, "auth_ref": [] }, "bti_NumberOfPlaintiffs": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPlaintiffs", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsSummaryofIndividualCasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of plaintiffs", "label": "Number Of Plaintiffs", "documentation": "Number of plaintiff." } } }, "auth_ref": [] }, "bti_NumberOfPreTrialCaseResolutionsForAttorneysFeesAndStatutoryInterest": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPreTrialCaseResolutionsForAttorneysFeesAndStatutoryInterest", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of pre-trial case resolutions for attorneys fees and statutory interest", "label": "Number Of Pre-Trial Case Resolutions For Attorneys Fees And Statutory Interest", "documentation": "Number Of Pre-Trial Case Resolutions For Attorneys Fees And Statutory Interest" } } }, "auth_ref": [] }, "bti_NumberOfPreviouslySettledCasesBroughtForward": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfPreviouslySettledCasesBroughtForward", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of previously settled cases brought forward", "label": "Number Of Previously Settled Cases Brought Forward", "documentation": "Number of previously settled cases brought forward." } } }, "auth_ref": [] }, "bti_NumberOfProvincesInCanada": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfProvincesInCanada", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canadian provinces", "label": "Number Of Provinces In Canada", "documentation": "Number Of Provinces In Canada" } } }, "auth_ref": [] }, "bti_NumberOfRepresentativesAllowedToStandAsidePunitiveDamagesAward": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfRepresentativesAllowedToStandAsidePunitiveDamagesAward", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Number of representatives allowed by judgment to stand aside punitive damages award", "label": "Number Of Representatives Allowed To Stand Aside Punitive Damages Award", "documentation": "Number of representatives allowed to stand aside punitive damages award." } } }, "auth_ref": [] }, "bti_NumberOfRepresentativesAwarded": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfRepresentativesAwarded", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of representative in Engle class action awarded", "label": "Number Of Representatives Awarded", "documentation": "Number of representatives awarded." } } }, "auth_ref": [] }, "bti_NumberOfResolutionBundlesForAttorneysFeesAndStatutoryInterest": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfResolutionBundlesForAttorneysFeesAndStatutoryInterest", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of resolution bundles for attorneys fees and statutory interest", "label": "Number Of Resolution Bundles For Attorneys Fees And Statutory Interest", "documentation": "Number Of Resolution Bundles For Attorneys Fees And Statutory Interest" } } }, "auth_ref": [] }, "ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfShareOptionsExercisableInSharebasedPaymentArrangement", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Number of share options exercisable (in shares)", "terseLabel": "Number of options, Exercisable at end of year (in shares)", "label": "Number of share options exercisable in share-based payment arrangement" } }, "en": { "role": { "documentation": "The number of share options exercisable in a share-based payment arrangement." } } }, "auth_ref": [ "r267" ] }, "ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfShareOptionsExercisedInSharebasedPaymentArrangement", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Changes during the year - share option schemes (in shares)", "negatedLabel": "Number of options, Exercised during the period (in shares)", "label": "Number of share options exercised in share-based payment arrangement" } }, "en": { "role": { "documentation": "The number of share options exercised in a share-based payment arrangement." } } }, "auth_ref": [ "r265" ] }, "ifrs-full_NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Number of options, Forfeited during the period (in shares)", "label": "Number of share options forfeited in share-based payment arrangement" } }, "en": { "role": { "documentation": "The number of share options forfeited in a share-based payment arrangement." } } }, "auth_ref": [ "r264" ] }, "ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement": { "xbrltype": "decimalItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfShareOptionsGrantedInSharebasedPaymentArrangement", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of options granted (in shares)", "label": "Number of share options granted in share-based payment arrangement" } }, "en": { "role": { "documentation": "The number of share options granted in a share-based payment arrangement." } } }, "auth_ref": [ "r263" ] }, "bti_NumberOfSharesAcquired": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfSharesAcquired", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Shares acquired (in shares)", "label": "Number Of Shares Acquired", "documentation": "Number Of Shares Acquired" } } }, "auth_ref": [] }, "bti_NumberOfSharesBroughtBackAndCancelledInShareBuyBackProgramme": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfSharesBroughtBackAndCancelledInShareBuyBackProgramme", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Changes during the year - shares bought back and cancelled (in shares)", "terseLabel": "Number of shares broght back and cancelled in share buy-back programme (in shares)", "label": "Number Of Shares Brought Back And Cancelled in Share Buy-Back Programme", "documentation": "Number Of Shares Brought Back And Cancelled in Share Buy-Back Programme" } } }, "auth_ref": [] }, "ifrs-full_NumberOfSharesIssued": { "xbrltype": "sharesItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfSharesIssued", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of shares issued", "label": "Number of shares issued" } }, "en": { "role": { "documentation": "The number of shares issued by the entity." } } }, "auth_ref": [ "r576" ] }, "ifrs-full_NumberOfSharesIssuedAndFullyPaid": { "xbrltype": "sharesItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "NumberOfSharesIssuedAndFullyPaid", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "periodStartLabel": "Allotted and fully paid beginning balance (in shares)", "periodEndLabel": "Allotted and fully paid ending balance (in shares)", "label": "Number of shares issued and fully paid" } }, "en": { "role": { "documentation": "The number of shares issued by the entity, for which full payment has been received." } } }, "auth_ref": [ "r34" ] }, "bti_NumberOfStates": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfStates", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of states", "label": "Number Of States", "documentation": "Number of states." } } }, "auth_ref": [] }, "bti_NumberOfStatesAdditionallyJoined": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfStatesAdditionallyJoined", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of states additionally joined", "label": "Number Of States Additionally Joined", "documentation": "Number of states additionally joined." } } }, "auth_ref": [] }, "bti_NumberOfStatesCoveredUnderAgreement": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfStatesCoveredUnderAgreement", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of states representing master settlement agreement", "label": "Number Of States Covered Under Agreement", "documentation": "Number of States covered under agreement" } } }, "auth_ref": [] }, "bti_NumberOfStatesNotDiligentlyEnforcedQualifyingStatuses": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfStatesNotDiligentlyEnforcedQualifyingStatuses", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of states bot diligently enforced qualifying statuses", "label": "Number Of States Not Diligently Enforced Qualifying Statuses", "documentation": "Number of states not diligently enforced qualifying statuses." } } }, "auth_ref": [] }, "bti_NumberOfSubsidiaries": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfSubsidiaries", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of subsidiaries", "label": "Number Of Subsidiaries", "documentation": "Number Of Subsidiaries" } } }, "auth_ref": [] }, "bti_NumberOfTerritoriesInCanada": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfTerritoriesInCanada", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Canadian territories", "label": "Number Of Territories In Canada", "documentation": "Number Of Territories In Canada" } } }, "auth_ref": [] }, "bti_NumberOfTobaccoRelatedDiseasesAllegedlyExpendedAsPublicHealthCareExpenses": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfTobaccoRelatedDiseasesAllegedlyExpendedAsPublicHealthCareExpenses", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of tobacco-related diseases allegedly expended as public health care expenses", "label": "Number Of Tobacco Related Diseases Allegedly Expended As Public Health Care Expenses", "documentation": "Number of tobacco-related diseases allegedly expended as public health care expenses." } } }, "auth_ref": [] }, "bti_NumberOfTranches": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfTranches", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of tranches", "label": "Number Of Tranches", "documentation": "Number Of Tranches" } } }, "auth_ref": [] }, "bti_NumberOfTreasurySharesCancelled": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfTreasurySharesCancelled", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Changes during the year - treasury shares cancelled (in shares)", "terseLabel": "Changes during the year - treasury shares cancelled (in shares)", "label": "Number Of Treasury Shares Cancelled", "documentation": "Number Of Treasury Shares Cancelled" } } }, "auth_ref": [] }, "bti_NumberOfTreasurySharesRepurchasedDuringThePeriod": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfTreasurySharesRepurchasedDuringThePeriod", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of treasury shares repurchased during the period (in shares)", "label": "Number Of Treasury Shares Repurchased During The Period", "documentation": "Number Of Treasury Shares Repurchased During The Period" } } }, "auth_ref": [] }, "bti_NumberOfUSReimbursementSuitPending": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfUSReimbursementSuitPending", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number reimbursement pending", "label": "Number Of U S Reimbursement Suit Pending", "documentation": "Number of US reimbursement suit pending." } } }, "auth_ref": [] }, "bti_NumberOfVotesPerShareholder": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "NumberOfVotesPerShareholder", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of votes per shareholder", "label": "Number Of Votes Per Shareholder", "documentation": "Number Of Votes Per Shareholder" } } }, "auth_ref": [] }, "stpr_OR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "OR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Oregon", "label": "OREGON" } } }, "auth_ref": [] }, "bti_OnePointSixSixEightPercentageNotesDueTwoThousandAndTwentySixMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OnePointSixSixEightPercentageNotesDueTwoThousandAndTwentySixMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "1.668% Notes due 2026", "label": "One Point Six Six Eight Percentage Notes Due Two Thousand And Twenty Six [Member]", "documentation": "One Point Six Six Eight Percentage Notes Due Two Thousand And Twenty Six ." } } }, "auth_ref": [] }, "bti_OneYearDecreaseMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OneYearDecreaseMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "1 Year Decrease", "label": "One Year Decrease [Member]", "documentation": "One year decrease." } } }, "auth_ref": [] }, "bti_OneYearIncreaseMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OneYearIncreaseMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "1 Year Increase", "label": "One Year Increase [Member]", "documentation": "One year increase." } } }, "auth_ref": [] }, "bti_OperatingCashFlowMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OperatingCashFlowMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Operating Cash Flow", "label": "Operating Cash Flow [Member]", "documentation": "Operating cash flow." } } }, "auth_ref": [] }, "bti_OperatingSegmentBreakdownAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OperatingSegmentBreakdownAxis", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Operating Segment Breakdown", "label": "Operating Segment Breakdown [Axis]", "documentation": "Operating Segment Breakdown." } } }, "auth_ref": [] }, "bti_OperatingSegmentBreakdownDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OperatingSegmentBreakdownDomain", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Operating Segment Breakdown [Domain]", "label": "Operating Segment Breakdown [Domain]", "documentation": "Operating Segment Breakdown [Domain]" } } }, "auth_ref": [] }, "bti_OptionsExercisablePeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OptionsExercisablePeriod", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Options exercisable period", "label": "Options Exercisable Period", "documentation": "Options exercisable period." } } }, "auth_ref": [] }, "bti_OrdinarySharesIssuedUnderShareOptionSchemesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OrdinarySharesIssuedUnderShareOptionSchemesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ordinary shares issued under share option schemes", "label": "Ordinary Shares Issued Under Share Option Schemes [Member]", "documentation": "Ordinary shares issued under share option schemes." } } }, "auth_ref": [] }, "ifrs-full_OrdinarySharesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OrdinarySharesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/Cover", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Ordinary shares, nominal value 25 pence per share", "terseLabel": "Ordinary shares", "label": "Ordinary shares [member]" } }, "en": { "role": { "documentation": "This member stands for equity instruments that are subordinate to all other classes of equity instruments." } } }, "auth_ref": [ "r584" ] }, "bti_OrganigramIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OrganigramIncMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Organigram Inc.", "label": "Organigram Inc [Member]", "documentation": "Organigram Inc. member." } } }, "auth_ref": [] }, "bti_OtherAdjustingItemsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAdjustingItemsOnEarningsBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 17.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other adjusting items", "label": "Other Adjusting Items On Earnings Basic", "documentation": "Other adjusting items on earnings basic." } } }, "auth_ref": [] }, "bti_OtherAdjustingItemsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAdjustingItemsOnEarningsDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 20.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other adjusting items", "label": "Other Adjusting Items On Earnings Diluted", "documentation": "Other adjusting items on earnings diluted." } } }, "auth_ref": [] }, "bti_OtherAdjustingItemsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAdjustingItemsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 28.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other adjusting items (in GBP per share)", "label": "Other Adjusting Items On Earnings Per Share Basic", "documentation": "Other adjusting items on earnings per share basic." } } }, "auth_ref": [] }, "bti_OtherAdjustingItemsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAdjustingItemsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 20.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other adjusting items per share (in GBP per share)", "label": "Other Adjusting Items On Earnings Per Share Diluted", "documentation": "Other adjusting items on earnings per share diluted." } } }, "auth_ref": [] }, "bti_OtherAdjustingItemsWhichHaveBeenAdjustedWithinOtherOperatingExpenses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAdjustingItemsWhichHaveBeenAdjustedWithinOtherOperatingExpenses", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Charges in respect of Nigerian FCCPC case", "terseLabel": "Other adjusting items in other operating expenses", "label": "Other Adjusting Items Which Have Been Adjusted Within Other Operating Expenses", "documentation": "Other adjusting items which have been adjusted within other operating expenses." } } }, "auth_ref": [] }, "ifrs-full_OtherAdjustmentsForNoncashItems": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherAdjustmentsForNoncashItems", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInOperations", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 other non-cash items", "label": "Other adjustments for non-cash items" } }, "en": { "role": { "documentation": "Adjustments for non-cash items to reconcile profit (loss) to net cash flow from (used in) operating activities that the entity does not separately disclose in the same statement or note. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r620" ] }, "ifrs-full_OtherAssetsAmountContributedToFairValueOfPlanAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherAssetsAmountContributedToFairValueOfPlanAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails": { "parentTag": "ifrs-full_PlanAssetsAtFairValue", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other assets", "label": "Other assets, amount contributed to fair value of plan assets" } }, "en": { "role": { "documentation": "The amount other types of assets not separately disclosed contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]]" } } }, "auth_ref": [ "r597" ] }, "bti_OtherAssociatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAssociatesMember", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other associates", "label": "Other Associates [Member]", "documentation": "Other associates." } } }, "auth_ref": [] }, "bti_OtherAssuranceServicesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherAssuranceServicesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "other assurance services", "label": "Other Assurance Services [Member]", "documentation": "Other assurance services." } } }, "auth_ref": [] }, "ifrs-full_OtherBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherBorrowings", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails": { "parentTag": "ifrs-full_Borrowings", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other loans", "label": "Other borrowings" } }, "en": { "role": { "documentation": "The amount of borrowings that the entity does not separately disclose in the same statement or note. [Refer: Borrowings]" } } }, "auth_ref": [ "r578" ] }, "bti_OtherBrandsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherBrandsMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Other Brands [Member]", "documentation": "Other Brands" } } }, "auth_ref": [] }, "bti_OtherCanadianSmokingAndHealthClassActionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherCanadianSmokingAndHealthClassActionsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Canadian smoking and health class actions", "label": "Other Canadian Smoking And Health Class Actions [Member]", "documentation": "Other Canadian smoking and health class actions." } } }, "auth_ref": [] }, "ifrs-full_OtherComprehensiveIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncome", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_ComprehensiveIncome", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "totalLabel": "Other comprehensive income for the year", "terseLabel": "Other comprehensive (expense) income for the year", "verboseLabel": "Other comprehensive income (loss)", "label": "Other comprehensive income" } }, "en": { "role": { "documentation": "The amount of income and expense (including reclassification adjustments) that is not recognised in profit or loss as required or permitted by IFRSs. [Refer: IFRSs [member]]" } } }, "auth_ref": [ "r3", "r40", "r54", "r222" ] }, "ifrs-full_OtherComprehensiveIncomeAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeAbstract", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Other comprehensive (expense)/income", "verboseLabel": "Other comprehensive income:", "label": "Other comprehensive income [abstract]" } } }, "auth_ref": [] }, "bti_OtherComprehensiveIncomeAssociatesDifferencesOnExchangeThatWillBeReclassifiedToProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherComprehensiveIncomeAssociatesDifferencesOnExchangeThatWillBeReclassifiedToProfitOrLoss", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "differences on exchange reclassified to profit or loss", "verboseLabel": "Foreign exchange reclassified reclassified to income statement", "label": "Other Comprehensive Income, Associates Differences On Exchange That Will Be Reclassified To Profit Or Loss", "documentation": "Other Comprehensive Income, Associates Differences On Exchange That Will Be Reclassified To Profit Or Loss" } } }, "auth_ref": [] }, "ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 differences on exchange from translation of foreign operations", "label": "Other comprehensive income, before tax, exchange differences on translation of foreign operations" } }, "en": { "role": { "documentation": "The amount of other comprehensive income, before tax, after reclassification adjustments, related to exchange differences on translation of financial statements of foreign operations. [Refer: Other comprehensive income, before tax]" } } }, "auth_ref": [ "r30", "r55" ] }, "ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net actuarial (losses)/gains", "label": "Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans" } }, "en": { "role": { "documentation": "The amount of other comprehensive income, before tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [domain]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]" } } }, "auth_ref": [ "r30", "r55", "r594" ] }, "bti_OtherComprehensiveIncomeBeforeTaxHedgesOfNetInvestmentsDifferencesOnExchangeOnBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherComprehensiveIncomeBeforeTaxHedgesOfNetInvestmentsDifferencesOnExchangeOnBorrowings", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net investment hedges - differences on exchange on borrowings", "label": "Other Comprehensive Income, Before Tax, Hedges Of Net Investments Differences On Exchange On Borrowings", "documentation": "Other comprehensive income before tax hedges of net investments differences on exchange on borrowings." } } }, "auth_ref": [] }, "bti_OtherComprehensiveIncomeBeforeTaxMovementInSurplusRestrictions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherComprehensiveIncomeBeforeTaxMovementInSurplusRestrictions", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 movements in surplus restrictions", "verboseLabel": "\u2013 surplus recognition", "label": "Other Comprehensive Income, Before Tax, Movement in Surplus Restrictions", "documentation": "Other comprehensive income before tax surplus recognition." } } }, "auth_ref": [] }, "bti_OtherComprehensiveIncomeBeforeTaxNetActuarialGainsLosses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherComprehensiveIncomeBeforeTaxNetActuarialGainsLosses", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "\u2013 net actuarial losses", "label": "Other Comprehensive Income Before Tax Net Actuarial Gains Losses", "documentation": "Other comprehensive income before tax net actuarial gains losses." } } }, "auth_ref": [] }, "ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeNetOfTaxGainsLossesFromInvestmentsInEquityInstruments", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 net fair value losses", "label": "Other comprehensive income, net of tax, gains (losses) from investments in equity instruments" } }, "en": { "role": { "documentation": "The amount of other comprehensive income, net of tax, related to gains (losses) from changes in the fair value of investments in equity instruments that the entity has designated at fair value through other comprehensive income applying paragraph 5.7.5 of IFRS 9. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r30", "r54" ] }, "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncome", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "totalLabel": "Items that may be reclassified subsequently to profit or loss:", "label": "Other comprehensive income that will be reclassified to profit or loss, net of tax" } }, "en": { "role": { "documentation": "The amount of other comprehensive income that will be reclassified to profit or loss, net of tax. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r385", "r386" ] }, "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncome", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "totalLabel": "Items that will not be reclassified subsequently to profit or loss:", "label": "Other comprehensive income that will not be reclassified to profit or loss, net of tax" } }, "en": { "role": { "documentation": "The amount of other comprehensive income that will not be reclassified to profit or loss, net of tax. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r385", "r386" ] }, "bti_OtherCountriesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherCountriesMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Other Countries [Member]", "documentation": "Other countries." } } }, "auth_ref": [] }, "srt_OtherCurrencyMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "OtherCurrencyMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other currencies", "label": "Other Currency [Member]", "documentation": "Currency classified as other." } } }, "auth_ref": [] }, "ifrs-full_OtherCurrentAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherCurrentAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Other current assets" } }, "en": { "role": { "documentation": "The amount of current assets that the entity does not separately disclose in the same statement or note. [Refer: Current assets]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_OtherCurrentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherCurrentLiabilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other current liabilities", "label": "Other current liabilities" } }, "en": { "role": { "documentation": "The amount of current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Current liabilities]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_OtherCurrentPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherCurrentPayables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other current payables", "label": "Other current payables" } }, "en": { "role": { "documentation": "The amount of current payables that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r581" ] }, "ifrs-full_OtherCurrentReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherCurrentReceivables", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other current receivables", "label": "Other current receivables" } }, "en": { "role": { "documentation": "The amount of current other receivables. [Refer: Other receivables]" } } }, "auth_ref": [ "r382" ] }, "bti_OtherDerivativeFinancialAssets": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherDerivativeFinancialAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails": { "parentTag": "ifrs-full_DerivativeFinancialAssets", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Assets, Derivatives - other", "label": "Other Derivative Financial Assets", "documentation": "Other derivative financial assets." } } }, "auth_ref": [] }, "bti_OtherDerivativeFinancialLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherDerivativeFinancialLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails_1": { "parentTag": "ifrs-full_DerivativeFinancialLiabilities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities, Derivatives - other", "label": "Other Derivative Financial Liabilities", "documentation": "Other derivative financial liabilities." } } }, "auth_ref": [] }, "ifrs-full_OtherEquityInterest": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherEquityInterest", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other equity", "label": "Other equity interest" } }, "en": { "role": { "documentation": "The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r384" ] }, "ifrs-full_OtherExpenseByNature": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherExpenseByNature", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": -1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Other operating expenses", "terseLabel": "Other operating expenses", "label": "Other expenses, by nature" } }, "en": { "role": { "documentation": "The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature]" } } }, "auth_ref": [ "r61", "r378" ] }, "bti_OtherExpenseByNatureAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherExpenseByNatureAbstract", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "The following items are included within other operating expenses:", "label": "Other Expense By Nature [Abstract]", "documentation": "Other Expense By Nature." } } }, "auth_ref": [] }, "bti_OtherExpensesFromRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherExpensesFromRelatedPartyTransactions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "\u2013 other expenses", "label": "Other Expenses From Related Party Transactions", "documentation": "Other Expenses From Related Party Transactions" } } }, "auth_ref": [] }, "bti_OtherFirmsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherFirmsMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other firms", "label": "Other Firms [Member]", "documentation": "Other firms." } } }, "auth_ref": [] }, "ifrs-full_OtherIncome": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherIncome", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other operating income", "label": "Other income" } }, "en": { "role": { "documentation": "The amount of operating income that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r127", "r378", "r379" ] }, "bti_OtherIncomeFromRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherIncomeFromRelatedPartyTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 other income", "label": "Other Income From Related Party Transactions", "documentation": "Other income from related party transactions." } } }, "auth_ref": [] }, "ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 7.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Other inflows (outflows) of cash, classified as financing activities" } }, "en": { "role": { "documentation": "Inflows (outflows) of cash, classified as financing activities, that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r189" ] }, "bti_OtherInvestmentsInFormOfConvertibleLoanNoteMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherInvestmentsInFormOfConvertibleLoanNoteMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Investments, In Form Of Convertible Loan Note", "label": "Other Investments, In Form Of Convertible Loan Note [Member]", "documentation": "Other Investments, In Form Of Convertible Loan Note" } } }, "auth_ref": [] }, "bti_OtherListedAssociatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherListedAssociatesMember", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Listed Associates", "label": "Other Listed Associates [Member]", "documentation": "Other listed associates." } } }, "auth_ref": [] }, "bti_OtherNonAuditServicesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherNonAuditServicesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "other non-audit services", "label": "Other Non-Audit Services [Member]", "documentation": "Other Non-Audit Services" } } }, "auth_ref": [] }, "bti_OtherNonSmokingAndHealthCasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherNonSmokingAndHealthCasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other non smoking and health cases", "label": "Other Non Smoking And Health Cases [Member]", "documentation": "Other non-smoking and health cases." } } }, "auth_ref": [] }, "ifrs-full_OtherNoncurrentLiabilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherNoncurrentLiabilities", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails": { "parentTag": "ifrs-full_NoncurrentLiabilities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other non-current liabilities", "label": "Other non-current liabilities" } }, "en": { "role": { "documentation": "The amount of non-current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Non-current liabilities]" } } }, "auth_ref": [ "r581" ] }, "bti_OtherOperatingExpensesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherOperatingExpensesLineItems", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Operating Expenses [Line Items]", "label": "Other Operating Expenses [Line Items]", "documentation": "Other operating expenses." } } }, "auth_ref": [] }, "bti_OtherOperatingExpensesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherOperatingExpensesTable", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinRespectofNigerianFCCPCCaseAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Operating Expenses [Table]", "label": "Other Operating Expenses [Table]", "documentation": "Schedule disclosing information related to other operating expenses." } } }, "auth_ref": [] }, "bti_OtherOperatingIncomeAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherOperatingIncomeAbstract", "lang": { "en-us": { "role": { "label": "Other Operating Income [Abstract]", "documentation": "Other operating income." } } }, "auth_ref": [] }, "ifrs-full_OtherOperatingIncomeExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherOperatingIncomeExpense", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Transactions with non-issuer/non-guarantor subsidiaries (expense)/income", "label": "Other operating income (expense)" } }, "en": { "role": { "documentation": "The amount of operating income (expense) that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r585" ] }, "bti_OtherOperatingIncomeLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherOperatingIncomeLineItems", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Operating Income [Line Items]", "label": "Other Operating Income [Line Items]", "documentation": "Other operating income." } } }, "auth_ref": [] }, "bti_OtherOperatingIncomeTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherOperatingIncomeTable", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other Operating Income [Table]", "label": "Other Operating Income [Table]", "documentation": "Other operating income." } } }, "auth_ref": [] }, "ifrs-full_OtherPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherPayables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sundry payables", "label": "Other payables" } }, "en": { "role": { "documentation": "Amounts payable that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [ "r581" ] }, "bti_OtherPayablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherPayablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other payables", "label": "Other Payables [Member]", "documentation": "Other Payables" } } }, "auth_ref": [] }, "ecd_OtherPerfMeasureAmt": { "xbrltype": "decimalItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "OtherPerfMeasureAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Other Performance Measure, Amount", "terseLabel": "Other Performance Measure, Amount" } } }, "auth_ref": [ "r523" ] }, "ifrs-full_OtherPropertyPlantAndEquipmentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherPropertyPlantAndEquipmentMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Plant, equipment and other", "label": "Other property, plant and equipment [member]" } }, "en": { "role": { "documentation": "This member stands for a class of property, plant and equipment representing property, plant and equipment that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r591" ] }, "ifrs-full_OtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherProvisions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other provisions", "label": "Other provisions" } }, "en": { "role": { "documentation": "The amount of provisions other than provisions for employee benefits. [Refer: Provisions]" } } }, "auth_ref": [ "r32", "r158" ] }, "bti_OtherPutativeClassActionCaseActivitiesCurrent": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherPutativeClassActionCaseActivitiesCurrent", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other putative class action case activities current", "label": "Other Putative Class Action Case Activities Current", "documentation": "Other putative class action case activities current." } } }, "auth_ref": [] }, "bti_OtherPutativeClassActionCaseFiledDate": { "xbrltype": "gYearMonthItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherPutativeClassActionCaseFiledDate", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other putative class action case filed date", "label": "Other Putative Class Action Case Filed Date", "documentation": "Other Putative Class Action Case Filed Date" } } }, "auth_ref": [] }, "ifrs-full_OtherReserves": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherReserves", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAttributableToOwnersOfParent", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Other reserves", "label": "Other reserves" } }, "en": { "role": { "documentation": "A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]" } } }, "auth_ref": [ "r384" ] }, "ifrs-full_OtherReservesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherReservesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Other reserves", "verboseLabel": "Total other reserves", "label": "Other reserves [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]" } } }, "auth_ref": [ "r6" ] }, "bti_OtherSuppliersMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OtherSuppliersMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other suppliers", "label": "Other Suppliers [Member]", "documentation": "Other Suppliers" } } }, "auth_ref": [] }, "ifrs-full_OtherTemporaryDifferencesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OtherTemporaryDifferencesMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other temporary differences", "label": "Other temporary differences [member]" } }, "en": { "role": { "documentation": "This member stands for temporary differences that the entity does not separately disclose in the same statement or note. [Refer: Temporary differences [member]]" } } }, "auth_ref": [ "r589" ] }, "bti_OthersMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OthersMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other", "label": "Others [Member]", "documentation": "Others." } } }, "auth_ref": [] }, "bti_OutflowMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OutflowMember", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Outflow", "label": "Outflow [Member]", "documentation": "Outflow." } } }, "auth_ref": [] }, "ifrs-full_OutflowsOfCashFromInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "OutflowsOfCashFromInvestingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofReconciliationofFairValueInvestmentsCashFlowstoCashFlowStatementsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Cash outflows from investments per cash flow statement", "label": "Outflows of cash from investing activities" } }, "en": { "role": { "documentation": "The cash outflow for investing activities." } } }, "auth_ref": [ "r617" ] }, "bti_OutsideUnitedStatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OutsideUnitedStatesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Outside United States", "label": "Outside United States [Member]", "documentation": "Outside United States." } } }, "auth_ref": [] }, "ecd_OutstandingAggtErrCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "OutstandingAggtErrCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Outstanding Aggregate Erroneous Compensation Amount", "terseLabel": "Outstanding Aggregate Erroneous Compensation Amount" } } }, "auth_ref": [ "r484", "r495", "r505", "r538" ] }, "ecd_OutstandingRecoveryCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "OutstandingRecoveryCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Outstanding Recovery Compensation Amount", "terseLabel": "Compensation Amount" } } }, "auth_ref": [ "r487", "r498", "r508", "r541" ] }, "ecd_OutstandingRecoveryIndName": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "OutstandingRecoveryIndName", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Outstanding Recovery, Individual Name", "terseLabel": "Name" } } }, "auth_ref": [ "r487", "r498", "r508", "r541" ] }, "bti_OverdraftsAndAccruedInterest": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OverdraftsAndAccruedInterest", "crdr": "credit", "calculation": { "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails": { "parentTag": "ifrs-full_CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition", "weight": -1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsSummaryofNetCashandCashEquivalentsShownAfterDeductingBankOverdraftsandAccruedInterestDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Less overdrafts and accrued interest", "label": "Overdrafts And Accrued Interest", "documentation": "Overdrafts and accrued interest." } } }, "auth_ref": [] }, "srt_OwnershipAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "OwnershipAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ownership [Axis]", "label": "Ownership [Axis]", "documentation": "Information by name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment." } } }, "auth_ref": [] }, "srt_OwnershipDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "OwnershipDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ownership [Domain]", "label": "Ownership [Domain]", "documentation": "Name of entity in which ownership interest is disclosed. Excludes equity method investee and named security investment." } } }, "auth_ref": [] }, "bti_OwnershipInterestAcquired": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "OwnershipInterestAcquired", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ownership interest acquired", "label": "Ownership Interest Acquired", "documentation": "Ownership interest acquired." } } }, "auth_ref": [] }, "country_PE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "PE", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Peru", "label": "PERU" } } }, "auth_ref": [] }, "bti_PallMallMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PallMallMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/IntangibleassetsScheduleofdefinitelivedintangibleassetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pall Mall", "label": "Pall Mall [Member]", "documentation": "Pall Mall" } } }, "auth_ref": [] }, "ifrs-full_ParValuePerShare": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ParValuePerShare", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Price per ordinary shares (in GBP pence per share)", "label": "Par value per share" } }, "en": { "role": { "documentation": "The nominal value per share." } } }, "auth_ref": [ "r35" ] }, "bti_ParentCompanyAndGroupAuditMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ParentCompanyAndGroupAuditMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Parent Company and Group Audit", "label": "Parent Company And Group Audit [Member]", "documentation": "Parent company and group audit." } } }, "auth_ref": [] }, "bti_ParentCompanyLocalStatutoryAndGroupAuditsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ParentCompanyLocalStatutoryAndGroupAuditsMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Parent Company Local Statutory And Group Audits", "label": "Parent Company Local Statutory And Group Audits [Member]", "documentation": "Parent company local statutory and group audits." } } }, "auth_ref": [] }, "srt_ParentCompanyMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ParentCompanyMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Parent Company", "label": "Parent Company [Member]", "documentation": "Registrant with controlling financial interest in one or more subsidiaries. Controlling interest in subsidiary includes, but is not limited to, primary beneficiary of variable interest entity (VIE). Controlling interest in subsidiary excludes broker-dealer with controlling financial interest in subsidiary but control is likely to be temporary." } } }, "auth_ref": [ "r351" ] }, "bti_PartnershipShareSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PartnershipShareSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Partnership Share Scheme", "label": "Partnership Share Scheme [Member]", "documentation": "Partnership share scheme." } } }, "auth_ref": [] }, "ifrs-full_PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PastServiceCostAndGainsLossesArisingFromSettlementsNetDefinedBenefitLiabilityAsset", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Past service (credit)/cost and settlements", "label": "Increase (decrease) in net defined benefit liability (asset) resulting from past service cost and losses (gains) arising from settlements" } }, "en": { "role": { "documentation": "The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost and losses (gains) arising from settlements. [Refer: Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements; Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r93" ] }, "ecd_PayVsPerformanceDisclosureLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PayVsPerformanceDisclosureLineItems", "lang": { "en-us": { "role": { "label": "Pay vs Performance Disclosure [Line Items]", "terseLabel": "Pay vs Performance Disclosure" } } }, "auth_ref": [ "r512" ] }, "bti_PaymentBreakdownAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentBreakdownAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment Breakdown [Axis]", "label": "Payment Breakdown [Axis]", "documentation": "Payment Breakdown" } } }, "auth_ref": [] }, "bti_PaymentBreakdownDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentBreakdownDomain", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment Breakdown [Domain]", "label": "Payment Breakdown [Domain]", "documentation": "Payment Breakdown [Domain]" } } }, "auth_ref": [] }, "bti_PaymentObligationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentObligationMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment obligation", "label": "Payment Obligation [Member]", "documentation": "Payment obligation." } } }, "auth_ref": [] }, "bti_PaymentOfCoupons": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentOfCoupons", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 2.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Coupon paid on perpetual hybrid bonds", "terseLabel": "Payment of coupons", "label": "Payment Of Coupons", "documentation": "Payment of coupons." } } }, "auth_ref": [] }, "bti_PaymentOfLitigationInitialDeposits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentOfLitigationInitialDeposits", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment of litigation initial deposits", "label": "Payment Of Litigation Initial Deposits", "documentation": "Payment of litigation initial deposits." } } }, "auth_ref": [] }, "bti_PaymentOfLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentOfLitigationSettlement", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement cash payments", "negatedTerseLabel": "Cash paid", "label": "Payment Of Litigation Settlement", "documentation": "Payment of litigation settlement." } } }, "auth_ref": [] }, "bti_PaymentOfOutstandingJudgmentByRelatedPartyToRelatedParty": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentOfOutstandingJudgmentByRelatedPartyToRelatedParty", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment of outstanding judgment by a related party to related party", "label": "Payment Of Outstanding Judgment By Related Party To Related Party", "documentation": "Payment of outstanding judgment by a related party to related party." } } }, "auth_ref": [] }, "bti_PaymentToAcquireNonControllingInterests": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentToAcquireNonControllingInterests", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payment to acquire NCI", "label": "Payment To Acquire Non Controlling Interests", "documentation": "Payment to acquire non controlling interests." } } }, "auth_ref": [] }, "bti_PaymentsForLitigationSettlements": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsForLitigationSettlements", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement payments", "label": "Payments for Litigation Settlements", "documentation": "Payments for litigation settlements." } } }, "auth_ref": [] }, "ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PaymentsFromPlanNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Benefits paid", "terseLabel": "Benefits paid", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from payments from plan" } }, "en": { "role": { "documentation": "The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)]" } } }, "auth_ref": [ "r96" ] }, "bti_PaymentsInRespectOfLitigationClaimSettlements": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsInRespectOfLitigationClaimSettlements", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payments of litigation claim settlements", "label": "Payments In Respect Of Litigation Claim Settlements", "documentation": "Payments in respect of litigation claim settlements." } } }, "auth_ref": [] }, "ifrs-full_PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease (increase) in net defined benefit liability (asset) resulting from payments in respect of settlements", "label": "Decrease (increase) in net defined benefit liability (asset) resulting from payments in respect of settlements" } }, "en": { "role": { "documentation": "The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan in respect of settlements. [Refer: Decrease (increase) in net defined benefit liability (asset) resulting from gains (losses) arising from settlements; Net defined benefit liability (asset); Defined benefit plans [domain]]" } } }, "auth_ref": [ "r96" ] }, "bti_PaymentsOfCapitalLeaseLiabilitiesClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsOfCapitalLeaseLiabilitiesClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 13.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Capital element of lease liabilities", "label": "Payments Of Capital Lease Liabilities, Classified As Financing Activities", "documentation": "Payments of capital lease liabilities classified as financing activities." } } }, "auth_ref": [] }, "bti_PaymentsOfInterestLeaseLiabilitiesClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsOfInterestLeaseLiabilitiesClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 10.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Interest element of lease liabilities", "negatedLabel": "Interest element of lease liabilities", "label": "Payments Of Interest Lease Liabilities, Classified As Financing Activities", "documentation": "Payments of interest lease liabilities classified as financing activities." } } }, "auth_ref": [] }, "ifrs-full_PaymentsToAcquireOrRedeemEntitysShares": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PaymentsToAcquireOrRedeemEntitysShares", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 1.0 }, "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedLabel": "Purchases of own shares - share buy-back programme", "negatedTerseLabel": "Purchase of own shares", "label": "Payments to acquire or redeem entity's shares" } }, "en": { "role": { "documentation": "The cash outflow to acquire or redeem entity's shares." } } }, "auth_ref": [ "r416" ] }, "bti_PaymentsToAcquireOrRedeemEntitysSharesHeldInEmployeeShareOwnershipTrusts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsToAcquireOrRedeemEntitysSharesHeldInEmployeeShareOwnershipTrusts", "crdr": "credit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 2.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedLabel": "Purchases of own shares held in employee share ownership trusts", "negatedTerseLabel": "Purchases of own shares held in employee share ownership trusts", "label": "Payments To Acquire Or Redeem Entity's Shares Held In Employee Share Ownership Trusts", "documentation": "Payments To Acquire Or Redeem Entity's Shares Held In Employee Share Ownership Trusts" } } }, "auth_ref": [] }, "bti_PaymentsToMadeOnRemediationWork": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PaymentsToMadeOnRemediationWork", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Payments to made on remediation work", "label": "Payments To Made On Remediation Work", "documentation": "Payments to made on remediation work." } } }, "auth_ref": [] }, "ecd_PeerGroupIssuersFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeerGroupIssuersFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Peer Group Issuers, Footnote [Text Block]", "terseLabel": "Peer Group Issuers, Footnote" } } }, "auth_ref": [ "r522" ] }, "ecd_PeerGroupTotalShareholderRtnAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeerGroupTotalShareholderRtnAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Peer Group Total Shareholder Return Amount", "terseLabel": "Peer Group Total Shareholder Return Amount" } } }, "auth_ref": [ "r522" ] }, "ifrs-full_PensionDefinedBenefitPlansMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PensionDefinedBenefitPlansMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pension schemes", "label": "Pension defined benefit plans [member]" } }, "en": { "role": { "documentation": "This member stands for pension defined benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r595" ] }, "ecd_PeoActuallyPaidCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeoActuallyPaidCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "PEO Actually Paid Compensation Amount", "terseLabel": "PEO Actually Paid Compensation Amount" } } }, "auth_ref": [ "r514" ] }, "ecd_PeoMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeoMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "PEO [Member]", "terseLabel": "PEO" } } }, "auth_ref": [ "r531" ] }, "ecd_PeoName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeoName", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "PEO Name", "terseLabel": "PEO Name" } } }, "auth_ref": [ "r524" ] }, "ecd_PeoTotalCompAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PeoTotalCompAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "PEO Total Compensation Amount", "terseLabel": "PEO Total Compensation Amount" } } }, "auth_ref": [ "r513" ] }, "bti_PercentageByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmount": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageByWhichValueAssignedToKeyAssumptionMustChangeInOrderForUnitsRecoverableAmountToBeEqualToCarryingAmount", "presentation": [ "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Decrease in revenue/long-term growth rate", "label": "Percentage By Which Value Assigned To Key Assumption Must Change In Order For Units Recoverable Amount To Be Equal To Carrying Amount", "documentation": "Percentage by which value assigned to key assumption must change in order for units recoverable amount to be equal to carrying amount." } } }, "auth_ref": [] }, "bti_PercentageOfAdditiveFreeInNaturalAmericanSpiritBrandCigarettes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfAdditiveFreeInNaturalAmericanSpiritBrandCigarettes", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of additive-free cigarettes", "label": "Percentage Of Additive Free In Natural American Spirit Brand Cigarettes", "documentation": "Percentage of additive-free in natural American spirit brand cigarettes." } } }, "auth_ref": [] }, "bti_PercentageOfBondsExchanged": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfBondsExchanged", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of coupon associated with perpetual bonds", "label": "Percentage Of Bonds Exchanged", "documentation": "Percentage of bonds exchanged." } } }, "auth_ref": [] }, "bti_PercentageOfCashTaxRefundsReceivedFromUpfrontPayments": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfCashTaxRefundsReceivedFromUpfrontPayments", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of cash tax refunds received from upfront payments", "label": "Percentage Of Cash Tax Refunds Received From Upfront Payments", "documentation": "Percentage Of Cash Tax Refunds Received From Upfront Payments" } } }, "auth_ref": [] }, "bti_PercentageOfDefinedBenefitCurrentServiceCost": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfDefinedBenefitCurrentServiceCost", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of defined benefit net costs charged to the adjusted profit", "label": "Percentage Of Defined Benefit Current Service Cost", "documentation": "Percentage of defined benefit net costs charged to adjusted profit ." } } }, "auth_ref": [] }, "bti_PercentageOfDefinedBenefitObligationUnfunded": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfDefinedBenefitObligationUnfunded", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of unfunded benefit schemes", "label": "Percentage Of Defined Benefit Obligation Unfunded", "documentation": "Percentage of defined benefit obligation unfunded." } } }, "auth_ref": [] }, "bti_PercentageOfEnvironmentalCleanUpCostsCommitment": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfEnvironmentalCleanUpCostsCommitment", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of environmental clean-up costs commitment with NCR", "label": "Percentage Of Environmental Clean Up Costs Commitment", "documentation": "Percentage of environmental clean up costs commitment." } } }, "auth_ref": [] }, "bti_PercentageOfEnvironmentalCleanUpCostsCommitmentAllocatedToLaterPeriod": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfEnvironmentalCleanUpCostsCommitmentAllocatedToLaterPeriod", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of environmental clean-up costs commitment allocated to later period", "label": "Percentage Of Environmental Clean Up Costs Commitment Allocated To Later Period", "documentation": "Percentage of environmental clean-up costs commitment allocated to later period." } } }, "auth_ref": [] }, "bti_PercentageOfEnvironmentalCleanUpCostsDemanded": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfEnvironmentalCleanUpCostsDemanded", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of environmental clean-up costs demanded", "label": "Percentage Of Environmental Clean Up Costs Demanded", "documentation": "Percentage of environmental clean up costs demanded." } } }, "auth_ref": [] }, "bti_PercentageOfEnvironmentalCleanUpCostsObligationsCommitment": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfEnvironmentalCleanUpCostsObligationsCommitment", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of environmental clean-up costs obligation commitment with NCR", "label": "Percentage Of Environmental Clean Up Costs Obligations Commitment", "documentation": "Percentage of environmental clean up costs obligations commitment." } } }, "auth_ref": [] }, "bti_PercentageOfFundingStatusRemainingFullyFundedLongTerm": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfFundingStatusRemainingFullyFundedLongTerm", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of funding status remaining fully funded long-term", "label": "Percentage Of Funding Status Remaining Fully Funded Long Term", "documentation": "Percentage of funding status remaining fully funded long term." } } }, "auth_ref": [] }, "bti_PercentageOfGrossDebt": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfGrossDebt", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of gross debt after taking into account derivative contracts", "label": "Percentage Of Gross Debt", "documentation": "Percentage of gross debt." } } }, "auth_ref": [] }, "bti_PercentageOfGrowthOfOperatingUnitsInFinancialBudgetAfterYearFive": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfGrowthOfOperatingUnitsInFinancialBudgetAfterYearFive", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of growth of operating units in financial budget after year 5 per annum", "label": "Percentage Of Growth Of Operating Units In Financial Budget After Year Five", "documentation": "Percentage Of Growth Of Operating Units In Financial Budget After Year Five" } } }, "auth_ref": [] }, "bti_PercentageOfGrowthOfOperatingUnitsInFinancialBudgetAfterYearTen": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfGrowthOfOperatingUnitsInFinancialBudgetAfterYearTen", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of growth of operating units in financial budget after year 10 per annum", "label": "Percentage Of Growth Of Operating Units In Financial Budget After Year Ten", "documentation": "Percentage Of Growth Of Operating Units In Financial Budget After Year Ten" } } }, "auth_ref": [] }, "bti_PercentageOfGrowthOfOperatingUnitsInFinancialBudgetInYearTwoToYearTen": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfGrowthOfOperatingUnitsInFinancialBudgetInYearTwoToYearTen", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of growth of operating units in financial budget in year 2 to 10 per annum", "label": "Percentage Of Growth Of Operating Units In Financial Budget In Year Two To Year Ten", "documentation": "Percentage of growth of operating units In financial budget in year two to year ten." } } }, "auth_ref": [] }, "bti_PercentageOfIndebtednessOfBorrowedMoneyComparedToLongTermDebtBeforeGuaranteeIsReleased": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfIndebtednessOfBorrowedMoneyComparedToLongTermDebtBeforeGuaranteeIsReleased", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Outstanding long-term debt", "label": "Percentage Of Indebtedness Of Borrowed Money Compared To Long Term Debt Before Guarantee Is Released", "documentation": "Percentage of indebtedness of borrowed money compared to long-term debt before guarantee is released." } } }, "auth_ref": [] }, "bti_PercentageOfLiabilitiesHeldByUkpf": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfLiabilitiesHeldByUkpf", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Proportion of scheme liabilities represented by buy-in contracts", "label": "Percentage of Liabilities Held By UKPF", "documentation": "Percentage of liabilities held by UKPF." } } }, "auth_ref": [] }, "bti_PercentageOfPrincipalSchemesToTotalDefinedBenefitSchemes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfPrincipalSchemesToTotalDefinedBenefitSchemes", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of principal schemes to total defined benefit schemes", "label": "Percentage Of Principal Schemes To Total Defined Benefit Schemes", "documentation": "Percentage of principal schemes to total defined benefit schemes." } } }, "auth_ref": [] }, "ifrs-full_PercentageOfReasonablyPossibleDecreaseInActuarialAssumption": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleDecreaseInActuarialAssumption", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible decrease in actuarial assumption", "label": "Percentage of reasonably possible decrease in actuarial assumption" } }, "en": { "role": { "documentation": "The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r98" ] }, "ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputAssets": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleDecreaseInUnobservableInputAssets", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible decrease in unobservable input, assets", "label": "Percentage of reasonably possible decrease in unobservable input, assets" } }, "en": { "role": { "documentation": "The percentage of a reasonably possible decrease in an unobservable input used in fair value measurement of assets." } } }, "auth_ref": [ "r624" ] }, "ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible decrease in unobservable input, liabilities", "label": "Percentage of reasonably possible decrease in unobservable input, liabilities" } }, "en": { "role": { "documentation": "The percentage of a reasonably possible decrease in an unobservable input used in fair value measurement of liabilities." } } }, "auth_ref": [ "r624" ] }, "ifrs-full_PercentageOfReasonablyPossibleIncreaseInActuarialAssumption": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleIncreaseInActuarialAssumption", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible increase in actuarial assumption", "label": "Percentage of reasonably possible increase in actuarial assumption" } }, "en": { "role": { "documentation": "The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [domain]]" } } }, "auth_ref": [ "r98" ] }, "ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleIncreaseInUnobservableInputAssets", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible increase in unobservable input, assets", "label": "Percentage of reasonably possible increase in unobservable input, assets" } }, "en": { "role": { "documentation": "The percentage of a reasonably possible increase in an unobservable input used in fair value measurement of assets." } } }, "auth_ref": [ "r624" ] }, "ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of reasonably possible increase in unobservable input, liabilities", "label": "Percentage of reasonably possible increase in unobservable input, liabilities" } }, "en": { "role": { "documentation": "The percentage of a reasonably possible increase in an unobservable input used in fair value measurement of liabilities." } } }, "auth_ref": [ "r624" ] }, "bti_PercentageOfSchemeLiabilitiesGuaranteedBenefits": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfSchemeLiabilitiesGuaranteedBenefits", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of scheme liabilities relate to guaranteed benefits", "label": "Percentage Of Scheme Liabilities Guaranteed Benefits", "documentation": "Percentage of scheme liabilities guaranteed benefits." } } }, "auth_ref": [] }, "bti_PercentageOfTradeAndOtherReceivablesDenominatedInOtherCurrencies": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfTradeAndOtherReceivablesDenominatedInOtherCurrencies", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of trade and other receivables denominated in other currencies", "label": "Percentage Of Trade And Other Receivables Denominated In Other Currencies", "documentation": "Percentage of trade and other receivables denominated in other currencies." } } }, "auth_ref": [] }, "bti_PercentageOfVotingEquityInterestDisposed": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PercentageOfVotingEquityInterestDisposed", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of voting equity interest disposed (in percentage)", "label": "Percentage Of Voting Equity Interest Disposed", "documentation": "Percentage Of Voting Equity Interests Disposed" } } }, "auth_ref": [] }, "ifrs-full_PercentageOfVotingEquityInterestsAcquired": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PercentageOfVotingEquityInterestsAcquired", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ChangesintheGroupNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Acquisition percentage", "label": "Percentage of voting equity interests acquired" } }, "en": { "role": { "documentation": "The percentage of voting equity interests acquired in a business combination. [Refer: Total for all business combinations [member]]" } } }, "auth_ref": [ "r274" ] }, "bti_PerformanceConditionsAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerformanceConditionsAxis", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Performance Conditions", "label": "Performance Conditions [Axis]", "documentation": "Performance conditions." } } }, "auth_ref": [] }, "bti_PerformanceConditionsDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerformanceConditionsDomain", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Performance Conditions [Domain]", "label": "Performance Conditions [Domain]", "documentation": "Performance Conditions [Domain]" } } }, "auth_ref": [] }, "bti_PerformanceSharePlansMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerformanceSharePlansMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Performance Share Plan (PSP)", "label": "Performance Share Plans [Member]", "documentation": "Performance share plans." } } }, "auth_ref": [] }, "bti_PeriodForPresentingAMemorandumOnDamagesAndInterest": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodForPresentingAMemorandumOnDamagesAndInterest", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period for presenting a memorandum on damages and interest", "label": "Period For Presenting a Memorandum On Damages And Interest", "documentation": "Period For Presenting a Memorandum On Damages And Interest" } } }, "auth_ref": [] }, "bti_PeriodOfPermissionToFileIndividualLawsuitsFromSupremeCourtSDecision": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodOfPermissionToFileIndividualLawsuitsFromSupremeCourtSDecision", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period of permission to file individual lawsuits", "label": "Period Of Permission To File Individual Lawsuits From Supreme Court S Decision", "documentation": "Period of permission to file individual lawsuits from supreme court's decision." } } }, "auth_ref": [] }, "bti_PeriodOfValueInUseCalculationOnBasisOfCashFlowForecast": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodOfValueInUseCalculationOnBasisOfCashFlowForecast", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period of value in use calculation on basis of cash flow forecast", "label": "Period Of Value In Use Calculation On Basis Of Cash Flow Forecast", "documentation": "Period of value in use calculation on basis of cash flow forecast." } } }, "auth_ref": [] }, "bti_PeriodOverWhichCreditsAreApplied": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodOverWhichCreditsAreApplied", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Credit period", "label": "Period Over Which Credits Are Applied", "documentation": "Period Over Which Credits Are Applied" } } }, "auth_ref": [] }, "bti_PeriodToCalculateNOPAdjustments": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodToCalculateNOPAdjustments", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period to calculate NOP adjustments", "label": "Period To Calculate NOP Adjustments", "documentation": "Period To Calculate NOP Adjustments" } } }, "auth_ref": [] }, "bti_PeriodToMeetAndConferOnIssueOfDamages": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PeriodToMeetAndConferOnIssueOfDamages", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period to meet and confer on issue of damages", "label": "Period To Meet And Confer On Issue Of Damages", "documentation": "Period To Meet And Confer On Issue Of Damages" } } }, "auth_ref": [] }, "bti_PerpetualHybridBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerpetualHybridBonds", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Perpetual hybrid bonds", "label": "Perpetual Hybrid Bonds", "documentation": "Perpetual hybrid bonds." } } }, "auth_ref": [] }, "bti_PerpetualHybridBondsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerpetualHybridBondsAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Perpetual hybrid bonds", "label": "Perpetual Hybrid Bonds [Abstract]", "documentation": "Perpetual Hybrid Bonds" } } }, "auth_ref": [] }, "bti_PerpetualHybridBondsIssued": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerpetualHybridBondsIssued", "crdr": "credit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Perpetual hybrid bonds", "verboseLabel": "Perpetual hybrid bonds", "label": "Perpetual Hybrid Bonds Issued", "documentation": "Perpetual hybrid bonds issued." } } }, "auth_ref": [] }, "bti_PerpetualHybridBondsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PerpetualHybridBondsMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Perpetual hybrid bonds", "label": "Perpetual Hybrid Bonds [Member]", "documentation": "Perpetual hybrid bonds." } } }, "auth_ref": [] }, "bti_PhaseIIMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PhaseIIMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Phase II", "label": "Phase I I [Member]", "documentation": "Phase II" } } }, "auth_ref": [] }, "bti_PhilipMorrisMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PhilipMorrisMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Philip Morris", "label": "Philip Morris [Member]", "documentation": "Philip Morris" } } }, "auth_ref": [] }, "bti_PhilipMorrisUSAIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PhilipMorrisUSAIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "PM USA", "label": "Philip Morris U S A Inc [Member]", "documentation": "Philip Morris USA Inc." } } }, "auth_ref": [] }, "ifrs-full_PlanAssetsAtFairValue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PlanAssetsAtFairValue", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value of funded scheme assets", "periodStartLabel": "Fair value of scheme assets at 1 January", "periodEndLabel": "Fair value of scheme assets at 31 December", "totalLabel": "Fair value of scheme assets \u2028at 31 December", "label": "Plan assets, at fair value" } }, "en": { "role": { "documentation": "The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]" } } }, "auth_ref": [ "r601" ] }, "ifrs-full_PlanAssetsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PlanAssetsMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Plan assets", "label": "Plan assets [member]" } }, "en": { "role": { "documentation": "This member stands for defined benefit plan assets. Plan assets comprise: (a) assets held by a long-term employee benefit fund; and (b) qualifying insurance policies." } } }, "auth_ref": [ "r86" ] }, "bti_PlantAndEquipmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PlantAndEquipmentMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Plant and Equipment", "label": "Plant And Equipment [Member]", "documentation": "Plant and equipment." } } }, "auth_ref": [] }, "bti_PlantEquipmentAndOtherMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PlantEquipmentAndOtherMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsScheduleofTotalFutureMinimumLeasePaymentsunderNoncancellableOperatingLeasesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment", "label": "Plant Equipment And Other [Member]", "documentation": "Plant equipment and other." } } }, "auth_ref": [] }, "ecd_PnsnAdjsPrrSvcCstMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PnsnAdjsPrrSvcCstMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Pension Adjustments Prior Service Cost [Member]", "terseLabel": "Pension Adjustments Prior Service Cost" } } }, "auth_ref": [ "r515" ] }, "ecd_PnsnAdjsSvcCstMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PnsnAdjsSvcCstMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Pension Adjustments Service Cost [Member]", "terseLabel": "Pension Adjustments Service Cost" } } }, "auth_ref": [ "r571" ] }, "ecd_PnsnBnftsAdjFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PnsnBnftsAdjFnTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Pension Benefits Adjustments, Footnote [Text Block]", "terseLabel": "Pension Benefits Adjustments, Footnote" } } }, "auth_ref": [ "r514" ] }, "bti_PossibleAssumptionsDecreaseInVolumeYearOnYearInTheDiscretePeriodRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PossibleAssumptionsDecreaseInVolumeYearOnYearInTheDiscretePeriodRate", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Possible assumptions decrease In volume year on year in the discrete period, rate", "label": "Possible Assumptions Decrease In Volume Year On Year In the Discrete Period, Rate", "documentation": "Possible Assumptions Decrease In Volume Year On Year In the Discrete Period, Rate" } } }, "auth_ref": [] }, "bti_PostJudgmentInterest": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PostJudgmentInterest", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Post-judgment interest", "label": "Post Judgment Interest", "documentation": "Post Judgment Interest" } } }, "auth_ref": [] }, "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PostemploymentBenefitExpenseDefinedBenefitPlans", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "bti_AmountRecognisedInIncomeStatementForPensionAndRetirementBenefitCosts", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Defined benefit schemes", "label": "Post-employment benefit expense in profit or loss, defined benefit plans" } }, "en": { "role": { "documentation": "The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [domain]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss]" } } }, "auth_ref": [ "r594", "r600" ] }, "bti_PostemploymentBenefitExpenseDefinedBenefitPlansCurrentServiceCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PostemploymentBenefitExpenseDefinedBenefitPlansCurrentServiceCost", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 current service cost", "label": "Postemployment Benefit Expense Defined Benefit Plans Current Service Cost", "documentation": "Postemployment benefit expense defined benefit plans current service cost." } } }, "auth_ref": [] }, "bti_PostemploymentBenefitExpenseDefinedBenefitPlansPastServiceCostCreditCurtailmentAndSettlements": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PostemploymentBenefitExpenseDefinedBenefitPlansPastServiceCostCreditCurtailmentAndSettlements", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "ifrs-full_PostemploymentBenefitExpenseDefinedBenefitPlans", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Past service credit", "terseLabel": "\u2013 past service credit, curtailments and settlements", "label": "Postemployment Benefit Expense Defined Benefit Plans Past Service Cost (Credit) Curtailment And Settlements", "documentation": "Post employment benefit expense defined benefit plans past service cost curtailment and settlements." } } }, "auth_ref": [] }, "ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PostemploymentBenefitExpenseDefinedContributionPlans", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails": { "parentTag": "bti_AmountRecognisedInIncomeStatementForPensionAndRetirementBenefitCosts", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Defined contribution schemes", "label": "Post-employment benefit expense, defined contribution plans" } }, "en": { "role": { "documentation": "The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods." } } }, "auth_ref": [ "r103" ] }, "ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PostemploymentMedicalDefinedBenefitPlansMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinIncomeStatementDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Healthcare schemes", "label": "Post-employment medical defined benefit plans [member]" } }, "en": { "role": { "documentation": "This member stands for post-employment medical defined benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r396" ] }, "bti_PotentialProportionOfOwnershipInterestInEntity": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PotentialProportionOfOwnershipInterestInEntity", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Potential proportion ownership interest", "label": "Potential Proportion Of Ownership Interest In Entity", "documentation": "Potential Proportion Of Ownership Interest In Entity" } } }, "auth_ref": [] }, "bti_PreTaxDiscountRateProvisionCalculation": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PreTaxDiscountRateProvisionCalculation", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pre-tax discount rate, provision calculation", "label": "Pre-Tax Discount Rate, Provision Calculation", "documentation": "Pre-Tax Discount Rate, Provision Calculation" } } }, "auth_ref": [] }, "ifrs-full_PreferenceSharesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PreferenceSharesMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Preference shares", "label": "Preference shares [member]" } }, "en": { "role": { "documentation": "This member stands for equity instruments that are senior in some aspects to ordinary shares, but subordinate to debt instruments in terms of claim. [Refer: Ordinary shares [member]]" } } }, "auth_ref": [ "r584" ] }, "bti_PrejudgmentInterestCompensatoryDamagesAwardedToTheStatePercentage": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PrejudgmentInterestCompensatoryDamagesAwardedToTheStatePercentage", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Prejudgment interest, compensatory damages awarded to the state (in percentage)", "label": "Prejudgment Interest, Compensatory Damages Awarded To The State, Percentage", "documentation": "Prejudgment Interest, Compensatory Damages Awarded To The State, Percentage" } } }, "auth_ref": [] }, "bti_PrepaymentAndAccruedIncome": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PrepaymentAndAccruedIncome", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails_1": { "parentTag": "ifrs-full_TradeAndOtherReceivables", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Prepayments and accrued income", "label": "Prepayment And Accrued Income", "documentation": "Prepayment And Accrued Income" } } }, "auth_ref": [] }, "ifrs-full_PresentValueOfDefinedBenefitObligationMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PresentValueOfDefinedBenefitObligationMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofMovementsinSchemeLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Liabilities", "label": "Present value of defined benefit obligation [member]" } }, "en": { "role": { "documentation": "This member stands for the present value of a defined benefit obligation. The present value of a defined benefit obligation is the present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods." } } }, "auth_ref": [ "r87" ] }, "bti_PricePerShare": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PricePerShare", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Price per share (CAD per share)", "label": "Price Per Share", "documentation": "Price Per Share" } } }, "auth_ref": [] }, "ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromBorrowingsClassifiedAsFinancingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 12.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds from increases in and new borrowings", "label": "Proceeds from borrowings, classified as financing activities" } }, "en": { "role": { "documentation": "The cash inflow from borrowings obtained. [Refer: Borrowings]" } } }, "auth_ref": [ "r417" ] }, "ifrs-full_ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds from disposal", "label": "Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations" } }, "en": { "role": { "documentation": "The cash inflow from the disposal of non-current assets or disposal groups classified as held for sale and discontinued operations. [Refer: Discontinued operations [member]; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale]" } } }, "auth_ref": [ "r617" ] }, "ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromIssueOfBondsNotesAndDebentures", "crdr": "debit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds from the issue of perpetual hybrid bonds, net of issuance costs", "label": "Proceeds from issue of bonds, notes and debentures" } }, "en": { "role": { "documentation": "The cash inflow from the issuing of bonds, notes and debentures." } } }, "auth_ref": [ "r618" ] }, "bti_ProceedsFromLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProceedsFromLitigationSettlement", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount received", "label": "Proceeds From Litigation Settlement", "documentation": "Proceeds from litigation settlement." } } }, "auth_ref": [] }, "ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds on disposals of intangibles", "label": "Proceeds from sales of intangible assets, classified as investing activities" } }, "en": { "role": { "documentation": "The cash inflow from sales of intangible assets, classified as investing activities. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r415" ] }, "ifrs-full_ProceedsFromSalesOfInterestsInAssociates": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromSalesOfInterestsInAssociates", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds from disposal of shares in associate, net of tax", "label": "Proceeds from sales of interests in associates" } }, "en": { "role": { "documentation": "The cash inflow from sales of interests in associates. [Refer: Total for all associates [member]]" } } }, "auth_ref": [ "r617" ] }, "ifrs-full_ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromSalesOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds on disposals of investments", "label": "Proceeds from sales of investments other than investments accounted for using equity method" } }, "en": { "role": { "documentation": "The cash inflow from sales of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method; Investments other than investments accounted for using equity method]" } } }, "auth_ref": [ "r617" ] }, "ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Proceeds on disposal of property, plant and equipment", "label": "Proceeds from sales of property, plant and equipment, classified as investing activities" } }, "en": { "role": { "documentation": "The cash inflow from sales of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r415" ] }, "bti_ProceedsSubjectToReimbursementFromLitigationPreSettlementAfterTax": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProceedsSubjectToReimbursementFromLitigationPreSettlementAfterTax", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Litigation settlement amount received after tax", "label": "Proceeds Subject To Reimbursement From Litigation Pre Settlement After Tax", "documentation": "Proceeds subject to reimbursement from litigation pre settlement after tax." } } }, "auth_ref": [] }, "ifrs-full_ProductsAndServicesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProductsAndServicesAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Products and services [axis]", "label": "Products and services [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r340", "r434" ] }, "ifrs-full_ProductsAndServicesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProductsAndServicesDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Products and services [domain]", "label": "Products and services [domain]" } }, "en": { "role": { "documentation": "This member stands for the entity's products and services. It also represents the standard value for the 'Products and services' axis if no other member is used." } } }, "auth_ref": [ "r340", "r434" ] }, "bti_ProfitGrowthRateMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProfitGrowthRateMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Profit growth rate", "label": "Profit Growth Rate [Member]", "documentation": "Profit Growth Rate" } } }, "auth_ref": [] }, "ifrs-full_ProfitLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLoss", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_ComprehensiveIncome", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/GroupIncomeStatementAlternativeCalc": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/GroupStatementofChangesinEquity", "http://www.bat.com/role/GroupStatementofComprehensiveIncome", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Profit/(loss) for the year", "terseLabel": "Profit/(loss) for the year", "label": "Profit (loss)" } }, "en": { "role": { "documentation": "The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r2", "r39", "r188", "r201", "r203", "r333", "r336", "r426", "r438" ] }, "ifrs-full_ProfitLossAttributableToAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossAttributableToAbstract", "presentation": [ "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Attributable to:", "label": "Profit (loss), attributable to [abstract]" } } }, "auth_ref": [] }, "ifrs-full_ProfitLossAttributableToNoncontrollingInterests": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossAttributableToNoncontrollingInterests", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatementAlternativeCalc": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-controlling interests", "negatedLabel": "Non-controlling interests", "verboseLabel": "\u2013 Attributable to non-controlling interests", "label": "Profit (loss), attributable to non-controlling interests" } }, "en": { "role": { "documentation": "The profit (loss) from continuing and discontinued operations attributable to non-controlling interests. [Refer: Profit (loss); Non-controlling interests]" } } }, "auth_ref": [ "r42", "r206" ] }, "ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": "ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsBasic", "weight": 1.0, "order": 10.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 20.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Basic earnings/(loss) per share (ordinary shares of 25p each), Earnings", "terseLabel": "Basic earnings/(loss) per share", "label": "Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating basic earnings per share" } }, "en": { "role": { "documentation": "The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r137" ] }, "ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityIncludingDilutiveEffects", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails": { "parentTag": "bti_HeadlineEarningsDiluted", "weight": 1.0, "order": 9.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 14.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails", "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Diluted earnings/(loss) per share, Earnings", "terseLabel": "Diluted earnings/(loss) per share", "label": "Profit (loss), attributable to ordinary equity holders of parent entity, used in calculating diluted earnings per share" } }, "en": { "role": { "documentation": "The profit (loss) attributable to ordinary equity holders of the parent entity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r137" ] }, "bti_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityUsedInCalculatingEarningsPerShare": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityUsedInCalculatingEarningsPerShare", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Earnings/(loss)", "label": "Profit (Loss), Attributable To Ordinary Equity Holders Of Parent Entity, Used In Calculating Earnings Per Share", "documentation": "Reconciliation of earnings." } } }, "auth_ref": [] }, "ifrs-full_ProfitLossAttributableToOwnersOfParent": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossAttributableToOwnersOfParent", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatementAlternativeCalc": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails": { "parentTag": "bti_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityUsedInCalculatingEarningsPerShare", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails", "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "terseLabel": "Owners of the parent", "verboseLabel": "Earnings/(loss) attributable to owners of the parent", "label": "Profit (loss), attributable to owners of parent" } }, "en": { "role": { "documentation": "The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r43" ] }, "ifrs-full_ProfitLossBeforeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossBeforeTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Profit/(loss) before taxation", "verboseLabel": "Profit on ordinary activities \u2028before taxation", "terseLabel": "Profit before taxation", "label": "Profit (loss) before tax" } }, "en": { "role": { "documentation": "The profit (loss) before tax expense or income. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r286", "r378", "r379", "r458", "r459" ] }, "ifrs-full_ProfitLossFromOperatingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProfitLossFromOperatingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Profit/(loss) from operations", "terseLabel": "Profit from operations", "verboseLabel": "Profit from operations", "label": "Profit (loss) from operating activities" } }, "en": { "role": { "documentation": "The profit (loss) from operating activities of the entity. [Refer: Profit (loss)]" } } }, "auth_ref": [ "r404", "r585" ] }, "ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentByOperatingLeaseStatusAxis", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment by operating lease status [axis]", "label": "Property, plant and equipment by operating lease status [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r248" ] }, "ifrs-full_PropertyPlantAndEquipmentByOperatingLeaseStatusDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentByOperatingLeaseStatusDomain", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment by operating lease status [domain]", "label": "Property, plant and equipment by operating lease status [domain]" } }, "en": { "role": { "documentation": "This member stands for all property, plant and equipment when disaggregated by the operating lease status by a lessor. It also represents the standard value for the 'Property, plant and equipment by operating lease status' axis if no other member is used. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r248" ] }, "bti_PropertyPlantAndEquipmentDepreciationRates": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PropertyPlantAndEquipmentDepreciationRates", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property plant and equipment depreciation rates", "label": "Property Plant And Equipment Depreciation Rates", "documentation": "Property plant and equipment depreciation rates." } } }, "auth_ref": [] }, "ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentIncludingRightofuseAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_NoncurrentAssets", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofCostofFreeholdLandDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment", "periodStartLabel": "Property, plant and equipment including right-of-use assets opening balance", "periodEndLabel": "Property, plant and equipment including right-of-use assets closing balance", "label": "Property, plant and equipment including right-of-use assets" } }, "en": { "role": { "documentation": "The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets]" } } }, "auth_ref": [ "r239", "r580", "r593" ] }, "ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssetsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentIncludingRightofuseAssetsAxis", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment including right-of-use assets [axis]", "label": "Property, plant and equipment including right-of-use assets [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r593" ] }, "ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssetsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentIncludingRightofuseAssetsDomain", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment including right-of-use assets [domain]", "label": "Property, plant and equipment including right-of-use assets [domain]" } }, "en": { "role": { "documentation": "This member stands for a class of asset representing property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment including right-of-use assets]" } } }, "auth_ref": [ "r593" ] }, "bti_PropertyPlantAndEquipmentInventoryAndReceivablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PropertyPlantAndEquipmentInventoryAndReceivablesMember", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, Plant and Equipment, Inventory and Receivables", "label": "Property Plant And Equipment Inventory And Receivables [Member]", "documentation": "Property plant and equipment inventory and receivables." } } }, "auth_ref": [] }, "ifrs-full_PropertyPlantAndEquipmentMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentMember", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsSummaryofDepreciationAmortisationandImpairmentCostsDetails", "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Property, plant and equipment", "label": "Property, plant and equipment [member]" } }, "en": { "role": { "documentation": "This member stands for property, plant and equipment. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r82", "r405", "r437" ] }, "ifrs-full_PropertyPlantAndEquipmentNotSubjectToOperatingLeasesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentNotSubjectToOperatingLeasesMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 separately acquired", "label": "Property, plant and equipment not subject to operating leases [member]" } }, "en": { "role": { "documentation": "This member stands for property, plant and equipment that is not subject to operating leases. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r248" ] }, "bti_PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PropertyPlantAndEquipmentRelatedTemporaryDifferencesMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Excess of capital allowances over depreciation", "label": "Property, Plant And Equipment Related Temporary Differences [Member]", "documentation": "Property, Plant And Equipment Related Temporary Differences" } } }, "auth_ref": [] }, "ifrs-full_PropertyPlantAndEquipmentSubjectToOperatingLeasesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PropertyPlantAndEquipmentSubjectToOperatingLeasesMember", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofLeaseholdLandandPropertyComprisesDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 right-of-use assets", "verboseLabel": "Property, plant and equipment subject to operating leases", "label": "Property, plant and equipment subject to operating leases [member]" } }, "en": { "role": { "documentation": "This member stands for property, plant and equipment that is subject to operating leases. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r248" ] }, "bti_ProportionOfAverageCostOfDebt": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProportionOfAverageCostOfDebt", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementManagementofFinancialRisksAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proportion of average cost of debt", "label": "Proportion Of Average Cost Of Debt", "documentation": "Proportion of average cost of debt." } } }, "auth_ref": [] }, "bti_ProportionOfAverageCostOfDebtExcludingAdjustingItems": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProportionOfAverageCostOfDebtExcludingAdjustingItems", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementManagementofFinancialRisksAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proportion of average cost of debt, excluding adjusting items", "label": "Proportion Of Average Cost Of Debt, Excluding Adjusting Items", "documentation": "Proportion Of Average Cost Of Debt, Excluding Adjusting Items" } } }, "auth_ref": [] }, "bti_ProportionOfOwnershipInterestDisposed": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProportionOfOwnershipInterestDisposed", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proportion of ownership interest in associate disposed (in percentage)", "label": "Proportion Of Ownership Interest Disposed", "documentation": "Proportion Of Ownership Interest Disposed" } } }, "auth_ref": [] }, "ifrs-full_ProportionOfOwnershipInterestInAssociate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProportionOfOwnershipInterestInAssociate", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ownership interest in associates", "label": "Proportion of ownership interest in associate" } }, "en": { "role": { "documentation": "The proportion of ownership interest in an associate attributable to the entity. [Refer: Total for all associates [member]]" } } }, "auth_ref": [ "r130", "r132", "r211" ] }, "ifrs-full_ProportionOfOwnershipInterestInSubsidiary": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProportionOfOwnershipInterestInSubsidiary", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Percentage of voting", "label": "Proportion of ownership interest in subsidiary" } }, "en": { "role": { "documentation": "The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Total for all subsidiaries [member]]" } } }, "auth_ref": [ "r130", "r132", "r209" ] }, "bti_ProportionOfSchemeAssetsRepresentedByBuyInContracts": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProportionOfSchemeAssetsRepresentedByBuyInContracts", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proportion of scheme assets represented by buy-in contracts", "label": "Proportion Of Scheme Assets Represented By Buy In Contracts", "documentation": "Proportion of scheme assets represented by buy-in contracts." } } }, "auth_ref": [] }, "ifrs-full_ProportionOfVotingPowerHeldInAssociate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProportionOfVotingPowerHeldInAssociate", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proportion of voting rights held in associate", "label": "Proportion of voting rights held in associate" } }, "en": { "role": { "documentation": "The proportion of the voting rights in an associate held by the entity. [Refer: Total for all associates [member]]" } } }, "auth_ref": [ "r130", "r132", "r211" ] }, "bti_ProposedTreasurySharesRepurchaseAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProposedTreasurySharesRepurchaseAmount", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Proposed treasury shares repurchase amount", "label": "Proposed Treasury Shares Repurchase Amount", "documentation": "Proposed treasury shares repurchase amount." } } }, "auth_ref": [] }, "bti_ProvisionChargedToNetFinanceCostsAgainstNonCurrentInvestments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionChargedToNetFinanceCostsAgainstNonCurrentInvestments", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision charged to net finance costs against non-current investments", "label": "Provision Charged To Net Finance Costs Against Non Current Investments", "documentation": "Provision charged to net finance costs against non-current investments." } } }, "auth_ref": [] }, "bti_ProvisionFinancialAssetsAtFairValueThroughProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionFinancialAssetsAtFairValueThroughProfitOrLoss", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reversal of provision", "label": "Provision Financial Assets At Fair Value Through Profit Or Loss", "documentation": "Provision financial assets at fair value through profit or loss." } } }, "auth_ref": [] }, "bti_ProvisionForEnvironmentalCleanUpCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionForEnvironmentalCleanUpCosts", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision for environmental clean-up costs", "label": "Provision For Environmental Clean Up Costs", "documentation": "Provision for environmental clean up costs." } } }, "auth_ref": [] }, "bti_ProvisionForInterestMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionForInterestMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision For Interest", "label": "Provision For Interest [Member]", "documentation": "Provision For Interest" } } }, "auth_ref": [] }, "ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProvisionForTaxesOtherThanIncomeTaxMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision for taxes other than income tax", "label": "Provision for taxes other than income tax [member]" } }, "en": { "role": { "documentation": "This member stands for a provision for taxes other than income tax. Income taxes include all domestic and foreign taxes which are based on taxable profits. Income taxes also include taxes, such as withholding taxes, which are payable by a subsidiary, associate or joint arrangement on distributions to the reporting entity. [Refer: Classes of other provisions [domain]]" } } }, "auth_ref": [ "r608" ] }, "bti_ProvisionReversalToNetFinanceCostsAgainstNonCurrentInvestments": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionReversalToNetFinanceCostsAgainstNonCurrentInvestments", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision reversal", "label": "Provision Reversal To Net Finance Costs Against Non Current Investments", "documentation": "Provision Reversal To Net Finance Costs Against Non Current Investments" } } }, "auth_ref": [] }, "bti_ProvisionTerm": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionTerm", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision term", "label": "Provision Term", "documentation": "Provision Term" } } }, "auth_ref": [] }, "ifrs-full_ProvisionUsedOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ProvisionUsedOtherProvisions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provisions utilised", "negatedLabel": "Utilised during the year", "label": "Provision used, other provisions" } }, "en": { "role": { "documentation": "The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions]" } } }, "auth_ref": [ "r160" ] }, "ifrs-full_Provisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Provisions", "crdr": "credit", "calculation": { "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provision for expected liability", "periodStartLabel": "Beginning balance", "periodEndLabel": "Ending balance", "totalLabel": "Provisions for liabilities", "label": "Provisions" } }, "en": { "role": { "documentation": "The amount of liabilities of uncertain timing or amount, including provisions for employee benefits." } } }, "auth_ref": [ "r18" ] }, "bti_ProvisionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionsMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provisions", "label": "Provisions [Member]", "documentation": "Provisions" } } }, "auth_ref": [] }, "bti_ProvisionsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Provisions", "label": "Provisions Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Provisions of investments other than investments accounted for using equity method." } } }, "auth_ref": [] }, "bti_ProvisionsUnderStateSettlementAgreements": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ProvisionsUnderStateSettlementAgreements", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Provisions under state settlement agreements", "label": "Provisions Under State Settlement Agreements", "documentation": "Provisions under state settlement agreements." } } }, "auth_ref": [] }, "bti_PunitiveDamagesAwardedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PunitiveDamagesAwardedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Punitive damages", "label": "Punitive Damages Awarded [Member]", "documentation": "Punitive Damages Awarded" } } }, "auth_ref": [] }, "ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Purchases of intangibles", "label": "Purchase of intangible assets, classified as investing activities" } }, "en": { "role": { "documentation": "The cash outflow for the purchases of intangible assets, classified as investing activities. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r414" ] }, "ifrs-full_PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Purchase of interests in investments accounted for using equity method", "label": "Purchase of interests in investments accounted for using equity method" } }, "en": { "role": { "documentation": "The cash outflow for the purchase of interests in investments accounted for using the equity method. [Refer: Investments accounted for using equity method]" } } }, "auth_ref": [ "r617" ] }, "ifrs-full_PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchaseOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": -1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Purchases of investments", "terseLabel": "Purchase of investments other than investments accounted for using equity method", "label": "Purchase of investments other than investments accounted for using equity method" } }, "en": { "role": { "documentation": "The cash outflow for the purchase of investments other than investments accounted for using equity method. [Refer: Investments accounted for using equity method; Investments other than investments accounted for using equity method]" } } }, "auth_ref": [ "r617" ] }, "bti_PurchaseOfOwnSharesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PurchaseOfOwnSharesAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Purchase of own shares", "label": "Purchase Of Own Shares [Abstract]", "documentation": "Purchase Of Own Shares" } } }, "auth_ref": [] }, "ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInInvestingActivities", "weight": -1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Purchases of property, plant and equipment", "label": "Purchase of property, plant and equipment, classified as investing activities" } }, "en": { "role": { "documentation": "The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]" } } }, "auth_ref": [ "r414" ] }, "ifrs-full_PurchaseOfTreasuryShares": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchaseOfTreasuryShares", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "held in employee share ownership trusts", "terseLabel": "held in employee share ownership trusts", "negatedLabel": "\u2013 held in employee share ownership trusts", "label": "Purchase of treasury shares" } }, "en": { "role": { "documentation": "The decrease in equity resulting from the purchase of treasury shares. [Refer: Treasury shares]" } } }, "auth_ref": [ "r576" ] }, "ifrs-full_PurchasesOfGoodsRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "PurchasesOfGoodsRelatedPartyTransactions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "\u2013 purchases", "label": "Purchases of goods, related party transactions" } }, "en": { "role": { "documentation": "The amount of goods purchased by the entity in related party transactions. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r403" ] }, "bti_PutativeEngleClassMembersPermittedToFileDescription": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "PutativeEngleClassMembersPermittedToFileDescription", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Members permitted to file description", "label": "Putative Engle Class Members Permitted To File Description", "documentation": "Putative engle class members permitted to file description." } } }, "auth_ref": [] }, "ecd_PvpTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PvpTable", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Pay vs Performance Disclosure [Table]", "terseLabel": "Pay vs Performance Disclosure" } } }, "auth_ref": [ "r512" ] }, "ecd_PvpTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "PvpTableTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Pay vs Performance [Table Text Block]", "terseLabel": "Pay vs Performance Disclosure, Table" } } }, "auth_ref": [ "r512" ] }, "ifrs-full_QualifyingInsurancePoliciesAmountContributedToFairValueOfPlanAssets": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "QualifyingInsurancePoliciesAmountContributedToFairValueOfPlanAssets", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails": { "parentTag": "ifrs-full_PlanAssetsAtFairValue", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Buy-in insurance policies", "label": "Qualifying insurance policies, amount contributed to fair value of plan assets" } }, "en": { "role": { "documentation": "The amount qualifying insurance policies contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]]" } } }, "auth_ref": [ "r597", "r602" ] }, "bti_QuantumProvisionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "QuantumProvisionMember", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Quantum provision", "label": "Quantum Provision [Member]", "documentation": "Quantum Provision" } } }, "auth_ref": [] }, "bti_QuebecClassActionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "QuebecClassActionsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Quebec class actions", "label": "Quebec Class Actions [Member]", "documentation": "Quebec class actions." } } }, "auth_ref": [] }, "bti_RAIMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RAIMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "RAI", "label": "RAI [Member]", "documentation": "RAI." } } }, "auth_ref": [] }, "bti_RICOJudgmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RICOJudgmentMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "RICO judgment", "label": "RICO Judgment [Member]", "documentation": "RICO Judgment" } } }, "auth_ref": [] }, "bti_RJRTAndITGMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RJRTAndITGMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "RJRT and ITG", "label": "RJRT And ITG [Member]", "documentation": "RJRT and ITG." } } }, "auth_ref": [] }, "bti_RJRTBWAndLorillardTobaccoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RJRTBWAndLorillardTobaccoMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "R J R T B and W and Lorillard Tobacco", "label": "RJRT B&W And Lorillard Tobacco [Member]", "documentation": "RJRT, B&W and Lorillard Tobacco." } } }, "auth_ref": [] }, "bti_RJRTMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RJRTMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "RJRT", "label": "RJRT [Member]", "documentation": "RJRT." } } }, "auth_ref": [] }, "bti_RJReynoldsTobaccoCompanyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RJReynoldsTobaccoCompanyMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMSALiabilityDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "R J Reynolds Tobacco Company", "label": "R J Reynolds Tobacco Company [Member]", "documentation": "RJ Reynolds Tobacco Company." } } }, "auth_ref": [] }, "country_RO": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "RO", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Romania", "label": "ROMANIA" } } }, "auth_ref": [] }, "country_RU": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "RU", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Russia", "label": "RUSSIAN FEDERATION" } } }, "auth_ref": [] }, "ifrs-full_RangeAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RangeAxis", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Range [axis]", "label": "Range [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r197", "r235", "r252", "r268", "r431", "r433", "r627" ] }, "srt_RangeAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "RangeAxis", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Statistical Measurement [Axis]", "label": "Statistical Measurement [Axis]", "documentation": "Information by statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median." } } }, "auth_ref": [ "r352", "r354", "r356", "r357", "r359", "r375", "r376" ] }, "ifrs-full_RangeDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RangeDomain", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Range [domain]", "label": "Range [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregate ranges. It also represents the standard value for the 'Range' axis if no other member is used." } } }, "auth_ref": [ "r197", "r235", "r252", "r268", "r431", "r433", "r627" ] }, "srt_RangeMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "RangeMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofDetailedInformationAboutBorrowingsDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Statistical Measurement [Domain]", "label": "Statistical Measurement [Domain]", "documentation": "Statistical measurement. Includes, but is not limited to, minimum, maximum, weighted average, arithmetic average, and median." } } }, "auth_ref": [ "r352", "r354", "r356", "r357", "r359", "r375", "r376" ] }, "bti_RangeOfChangeInAssumptionAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RangeOfChangeInAssumptionAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Range Of Change In Assumption", "label": "Range Of Change In Assumption [Axis]", "documentation": "Range of change in assumption." } } }, "auth_ref": [] }, "bti_RangeOfChangeInAssumptionMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RangeOfChangeInAssumptionMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofSensitivityAnalysisDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Range Of Change In Assumption Member", "label": "Range Of Change In Assumption [Member]", "documentation": "Range of change in assumption." } } }, "auth_ref": [] }, "bti_RatioOfFixedRateBorrowingsAfterImpactOfDerivatives": { "xbrltype": "pureItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RatioOfFixedRateBorrowingsAfterImpactOfDerivatives", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ratio of fixed rate borrowings after impact of derivatives", "label": "Ratio Of Fixed Rate Borrowings After Impact Of Derivatives", "documentation": "Ratio Of Fixed Rate Borrowings After Impact Of Derivatives" } } }, "auth_ref": [] }, "bti_RatioOfFixedRateBorrowingsExcludingCashAndOtherLiquidAssetsInCanada": { "xbrltype": "pureItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RatioOfFixedRateBorrowingsExcludingCashAndOtherLiquidAssetsInCanada", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ratio of fixed rate borrowings, excluding cash and other liquid assets in Canada", "label": "Ratio Of Fixed Rate Borrowings, Excluding Cash And Other Liquid Assets In Canada", "documentation": "Ratio Of Fixed Rate Borrowings, Excluding Cash And Other Liquid Assets In Canada" } } }, "auth_ref": [] }, "bti_RatioOfFloatingRateBorrowingsAfterImpactOfDerivatives": { "xbrltype": "pureItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RatioOfFloatingRateBorrowingsAfterImpactOfDerivatives", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ratio of floating rate borrowings after impact of derivatives", "label": "Ratio Of Floating Rate Borrowings After Impact Of Derivatives", "documentation": "Ratio Of Floating Rate Borrowings After Impact Of Derivatives" } } }, "auth_ref": [] }, "bti_RatioOfFloatingRateBorrowingsExcludingCashAndOtherLiquidAssetsInCanada": { "xbrltype": "pureItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RatioOfFloatingRateBorrowingsExcludingCashAndOtherLiquidAssetsInCanada", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Ratio of floating rate borrowings, excluding cash and other liquid assets in Canada", "label": "Ratio Of Floating Rate Borrowings, Excluding Cash And Other Liquid Assets In Canada", "documentation": "Ratio Of Floating Rate Borrowings, Excluding Cash And Other Liquid Assets In Canada" } } }, "auth_ref": [] }, "bti_RawMaterialsAndConsumablesSuppliersExcludingLeafMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RawMaterialsAndConsumablesSuppliersExcludingLeafMember", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Raw materials and consumables suppliers (excl. leaf)", "label": "Raw Materials And Consumables Suppliers, Excluding Leaf [Member]", "documentation": "Raw Materials And Consumables Suppliers, Excluding Leaf" } } }, "auth_ref": [] }, "ifrs-full_RawMaterialsAndConsumablesUsed": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RawMaterialsAndConsumablesUsed", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": -1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/GroupIncomeStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Raw materials and consumables used", "label": "Raw materials and consumables used" } }, "en": { "role": { "documentation": "The amount of raw materials and consumables used in the production process or in the rendering of services. [Refer: Current raw materials]" } } }, "auth_ref": [ "r61", "r378" ] }, "bti_ReassessmentStatuteOfLimitationPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReassessmentStatuteOfLimitationPeriod", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reassessment, statute of limitation period", "label": "Reassessment Statute Of Limitation Period", "documentation": "Reassessment statute of limitation period." } } }, "auth_ref": [] }, "bti_ReceiptFromEscrowFunds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReceiptFromEscrowFunds", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Receipt from escrow funds", "label": "Receipt From Escrow Funds", "documentation": "Receipt from escrow funds." } } }, "auth_ref": [] }, "ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReclassificationAdjustmentsOnCashFlowHedgesBeforeTax", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": -1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "\u2013 reclassified and reported in profit for the year", "negatedLabel": "\u2013 reclassified and reported in profit for the year", "label": "Reclassification adjustments on cash flow hedges, before tax" } }, "en": { "role": { "documentation": "The amount of reclassification adjustments related to cash flow hedges, before tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income]" } } }, "auth_ref": [ "r57" ] }, "ifrs-full_ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationBeforeTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReclassificationAdjustmentsOnExchangeDifferencesOnTranslationBeforeTax", "crdr": "debit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": -1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "\u2013 reclassified and reported in profit for the year", "terseLabel": "Foreign exchange gain (loss) reclassified from other comprehensive income on disposal of business", "negatedLabel": "\u2013 reclassified and reported in profit for the year", "label": "Reclassification adjustments on exchange differences on translation of foreign operations, before tax" } }, "en": { "role": { "documentation": "The amount of reclassification adjustments related to exchange differences when the financial statements of foreign operations are translated, before tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r57", "r110" ] }, "bti_ReclassificationsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReclassificationsOfInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod", "crdr": "debit", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueScheduleofInvestmentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reclassifications", "label": "Reclassifications Of Investments Other Than Investments Accounted For Using Equity Method", "documentation": "Reclassifications Of Investments Other Than Investments Accounted For Using Equity Method" } } }, "auth_ref": [] }, "ecd_RecoveryOfErrCompDisclosureLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "RecoveryOfErrCompDisclosureLineItems", "lang": { "en-us": { "role": { "label": "Recovery of Erroneously Awarded Compensation Disclosure [Line Items]", "terseLabel": "Recovery of Erroneously Awarded Compensation Disclosure" } } }, "auth_ref": [ "r479", "r490", "r500", "r533" ] }, "bti_RecyclingAndWasteCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RecyclingAndWasteCosts", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": "bti_SustainabilityCostsRecognisedInProfitOrLoss", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails", "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Recycling/waste costs", "label": "Recycling and Waste Costs", "documentation": "Recycling and Waste Costs" } } }, "auth_ref": [] }, "ifrs-full_RefundsProvisionMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RefundsProvisionMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sales return provision", "label": "Refunds provision [member]" } }, "en": { "role": { "documentation": "This member stands for a provision for refunds to be made by the entity to its customers. [Refer: Classes of other provisions [domain]]" } } }, "auth_ref": [ "r407", "r410" ] }, "bti_RegisteredBATCAPBondsInConnectionWithTheAcquisitionOfRAIMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RegisteredBATCAPBondsInConnectionWithTheAcquisitionOfRAIMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Registered BATCAP Bonds in Connection with the Acquisition of RAI", "label": "Registered B A T C A P Bonds In Connection With The Acquisition Of R A I [Member]", "documentation": "Registered BATCAP bonds in connection with the acquisition of RAI." } } }, "auth_ref": [] }, "bti_RegisteredBATCAPBondsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RegisteredBATCAPBondsMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Registered BATCAP bonds", "label": "Registered BATCAP Bonds [Member]", "documentation": "Registered BATCAP bonds." } } }, "auth_ref": [] }, "bti_RegisteredBATIFBondsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RegisteredBATIFBondsMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Registered BATIF Bonds", "label": "Registered BATIF Bonds [Member]", "documentation": "Registered BATIF Bonds [member]" } } }, "auth_ref": [] }, "bti_RegisteredPortionOfBondsIssued": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RegisteredPortionOfBondsIssued", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Bonds issued, registered portion", "label": "Registered Portion Of Bonds Issued", "documentation": "Registered portion of bonds issued." } } }, "auth_ref": [] }, "ifrs-full_RegulatoryEnvironmentsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RegulatoryEnvironmentsAxis", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Regulatory environments [axis]", "label": "Regulatory environments [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r397" ] }, "ifrs-full_RegulatoryEnvironmentsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RegulatoryEnvironmentsDomain", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Regulatory environments [domain]", "label": "Regulatory environments [domain]" } }, "en": { "role": { "documentation": "This member stands for all regulatory environments. It also represents the standard value for the 'Regulatory environments' axis if no other member is used." } } }, "auth_ref": [ "r397" ] }, "bti_ReimbursementOfDueUnderContract": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReimbursementOfDueUnderContract", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reimbursement of funds allegedly due under contract", "label": "Reimbursement Of Due Under Contract", "documentation": "Reimbursement of due under contract." } } }, "auth_ref": [] }, "ifrs-full_RelatedPartyTransactionsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RelatedPartyTransactionsAbstract", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails", "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Transactions", "verboseLabel": "The total compensation for key management personnel, including Directors, was:", "label": "Related party transactions [abstract]" } } }, "auth_ref": [] }, "bti_RemainingCashFlowsRelatingToDerivatives": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RemainingCashFlowsRelatingToDerivatives", "crdr": "debit", "calculation": { "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsAlongwithReconciliationtotheFinancingActivitiesintheGroupCashFlowStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Remaining cash flows relating to derivative financial instruments", "label": "Remaining Cash Flows Relating To Derivatives", "documentation": "Remaining Cash Flows Relating To Derivatives" } } }, "auth_ref": [] }, "bti_RenewableEnergyCertificateCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RenewableEnergyCertificateCosts", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": "bti_SustainabilityCostsRecognisedInProfitOrLoss", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails", "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Renewable energy attribute certificates", "label": "Renewable Energy Certificate Costs", "documentation": "Renewable Energy Certificate Costs" } } }, "auth_ref": [] }, "ifrs-full_RepaymentsOfBondsNotesAndDebentures": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RepaymentsOfBondsNotesAndDebentures", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amount repaid", "label": "Repayments of bonds, notes and debentures" } }, "en": { "role": { "documentation": "The cash outflow for repayments of bonds, notes and debentures." } } }, "auth_ref": [ "r618" ] }, "ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RepaymentsOfBorrowingsClassifiedAsFinancingActivities", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_CashFlowsFromUsedInFinancingActivities", "weight": -1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/GroupCashFlowStatement" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Reductions in and repayments of borrowings", "label": "Repayments of borrowings, classified as financing activities" } }, "en": { "role": { "documentation": "The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]" } } }, "auth_ref": [ "r418" ] }, "bti_ReportableSegmentsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReportableSegmentsAbstract", "lang": { "en-us": { "role": { "terseLabel": "Reportable Segments [Abstract]", "label": "Reportable Segments [Abstract]", "documentation": "Reportable segments." } } }, "auth_ref": [] }, "bti_ReportableSegmentsNumber": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReportableSegmentsNumber", "presentation": [ "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reportable segments", "label": "Reportable Segments, Number", "documentation": "Reportable Segments, Number" } } }, "auth_ref": [] }, "bti_ReportedAtConstantRatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReportedAtConstantRatesMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reported at constant rates", "label": "Reported At Constant Rates [Member]", "documentation": "Reported At Constant Rates" } } }, "auth_ref": [] }, "bti_ReportedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReportedMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reported", "label": "Reported [Member]", "documentation": "Reported." } } }, "auth_ref": [] }, "bti_RepricedBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RepricedBorrowings", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Repriced borrowings", "label": "Repriced Borrowings", "documentation": "Repriced borrowings." } } }, "auth_ref": [] }, "srt_RepurchaseAgreementCounterpartyNameDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "RepurchaseAgreementCounterpartyNameDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Counterparty Name [Domain]", "label": "Counterparty Name [Domain]", "documentation": "Named other party that participates in a financial transaction. Examples include, but not limited to, the name of the financial institution." } } }, "auth_ref": [ "r372", "r373" ] }, "bti_ResearchAndDevelopmentExcludingEmployeeBenefitCostsAndDepreciation": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ResearchAndDevelopmentExcludingEmployeeBenefitCostsAndDepreciation", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Research and development expenses (excluding employee benefit costs and depreciation)", "label": "Research And Development Excluding Employee Benefit Costs And Depreciation", "documentation": "Research and development excluding employee benefit costs and depreciation." } } }, "auth_ref": [] }, "ifrs-full_ResearchAndDevelopmentExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ResearchAndDevelopmentExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesResearchandDevelopmentAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Research and development costs including employee benefit costs and depreciation", "label": "Research and development expense" } }, "en": { "role": { "documentation": "The amount of expenditure directly attributable to research or development activities, recognised in profit or loss." } } }, "auth_ref": [ "r175" ] }, "bti_ReserveForAssetsHeldForSaleMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReserveForAssetsHeldForSaleMember", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "In respect of assets held-for-sale", "label": "Reserve For Assets Held-For-Sale [Member]", "documentation": "Reserve For Assets Held-For-Sale" } } }, "auth_ref": [] }, "ifrs-full_ReserveOfCashFlowHedgesContinuingHedges": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReserveOfCashFlowHedgesContinuingHedges", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cash flow hedge reserve", "label": "Reserve of cash flow hedges, continuing hedges" } }, "en": { "role": { "documentation": "A component of equity representing the reserve of cash flow hedges in relation to continuing hedges. [Refer: Reserve of cash flow hedges]" } } }, "auth_ref": [ "r300" ] }, "ifrs-full_ReserveOfCashFlowHedgesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReserveOfCashFlowHedgesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Hedging reserve", "label": "Reserve of cash flow hedges [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]" } } }, "auth_ref": [ "r347", "r380" ] }, "ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReserveOfExchangeDifferencesOnTranslationMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Translation reserve", "label": "Reserve of exchange differences on translation [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing accumulated exchange differences on the translation of financial statements recognised in other comprehensive income. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r112", "r380" ] }, "ifrs-full_ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReserveOfGainsAndLossesOnRemeasuringAvailableforsaleFinancialAssetsMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value reserve", "label": "Reserve of gains and losses on remeasuring available-for-sale financial assets [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing accumulated gains and losses on remeasuring available-for-sale financial assets. [Refer: Financial assets available-for-sale]" } } }, "auth_ref": [ "r460" ] }, "bti_ResolutionOfClaimsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ResolutionOfClaimsMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Resolution of claims", "label": "Resolution Of Claims [Member]", "documentation": "Resolution of claims." } } }, "auth_ref": [] }, "bti_RestOfGroupMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestOfGroupMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rest of Group", "label": "Rest Of Group [Member]", "documentation": "Rest of group." } } }, "auth_ref": [] }, "ecd_RestatementDateAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "RestatementDateAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Restatement Determination Date [Axis]", "terseLabel": "Restatement Determination Date:" } } }, "auth_ref": [ "r480", "r491", "r501", "r534" ] }, "ecd_RestatementDeterminationDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "RestatementDeterminationDate", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Restatement Determination Date", "terseLabel": "Restatement Determination Date" } } }, "auth_ref": [ "r481", "r492", "r502", "r535" ] }, "ecd_RestatementDoesNotRequireRecoveryTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "RestatementDoesNotRequireRecoveryTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Restatement Does Not Require Recovery [Text Block]", "terseLabel": "Restatement does not require Recovery" } } }, "auth_ref": [ "r488", "r499", "r509", "r542" ] }, "ifrs-full_RestrictedCashAndCashEquivalents": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RestrictedCashAndCashEquivalents", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Restricted cash and cash equivalents", "verboseLabel": "Restricted cash and cash equivalents", "label": "Restricted cash and cash equivalents" } }, "en": { "role": { "documentation": "The amount of cash and cash equivalents whose use or withdrawal is restricted. [Refer: Cash and cash equivalents]" } } }, "auth_ref": [ "r581" ] }, "bti_RestrictedCashAndCashEquivalentsPrincipallyDueToExchangeControlRestrictions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestrictedCashAndCashEquivalentsPrincipallyDueToExchangeControlRestrictions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Restricted cash and cash equivalents principally due to exchange control restrictions", "label": "Restricted Cash And Cash Equivalents Principally Due To Exchange Control Restrictions", "documentation": "Restricted cash and cash equivalents principally due to exchange control restrictions." } } }, "auth_ref": [] }, "bti_RestrictedCashMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestrictedCashMember", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Restricted cash", "label": "Restricted Cash [Member]", "documentation": "Restricted Cash" } } }, "auth_ref": [] }, "bti_RestrictedSharePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestrictedSharePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Restricted Share Plan (RSP)", "label": "Restricted Share Plan [Member]", "documentation": "Restricted share plan." } } }, "auth_ref": [] }, "bti_RestructuringAndIntegrationCostsAssociatedWithEmployeeBenefitCostsCredit": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestructuringAndIntegrationCostsAssociatedWithEmployeeBenefitCostsCredit", "crdr": "debit", "calculation": { "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails": { "parentTag": "bti_BusinessCombinationRestructuringAndIntegrationCosts", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Employee benefit costs (credits)", "terseLabel": "Employee benefit costs", "label": "Restructuring And Integration Costs Associated With Employee Benefit Costs (Credit)", "documentation": "Restructuring and integration costs associated with all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment." } } }, "auth_ref": [] }, "bti_RestructuringAndIntegrationCostsAssociatedWithOtherOperatingIncome": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestructuringAndIntegrationCostsAssociatedWithOtherOperatingIncome", "crdr": "credit", "calculation": { "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails": { "parentTag": "bti_BusinessCombinationRestructuringAndIntegrationCosts", "weight": -1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Other operating income", "label": "Restructuring And Integration Costs Associated With Other Operating Income", "documentation": "Restructuring and integration costs associated with operating income that the entity does not separately disclose in the same statement or note." } } }, "auth_ref": [] }, "bti_RestructuringAndIntegrationCostsIncomesAssociatedWithOtherOperatingExpenses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestructuringAndIntegrationCostsIncomesAssociatedWithOtherOperatingExpenses", "crdr": "debit", "calculation": { "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails": { "parentTag": "bti_BusinessCombinationRestructuringAndIntegrationCosts", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other operating expenses", "verboseLabel": "Restructuring and integration costs (reversal) associated with other operating expenses", "label": "Restructuring And Integration Costs (Incomes) Associated With Other Operating Expenses", "documentation": "Restructuring and integration costs associated with expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses." } } }, "auth_ref": [] }, "bti_RestructuringAndIntegrationRelatedDepreciationAndImpairmentIncomeCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RestructuringAndIntegrationRelatedDepreciationAndImpairmentIncomeCost", "crdr": "debit", "calculation": { "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails": { "parentTag": "bti_BusinessCombinationRestructuringAndIntegrationCosts", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails", "http://www.bat.com/role/RestructuringandIntegrationCostsSummaryofCostofInitiativesinProfitfromOperationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Depreciation, amortisation and impairment costs", "verboseLabel": "Restructuring and integration related depreciation and impairment (credit) cost", "label": "Restructuring And Integration Related Depreciation And Impairment (Income) Cost", "documentation": "Restructuring and integration related depreciation and impairment income (cost)." } } }, "auth_ref": [] }, "ifrs-full_RestructuringProvisionMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RestructuringProvisionMember", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Restructuring of existing businesses", "label": "Restructuring provision [member]" } }, "en": { "role": { "documentation": "This member stands for a provision for restructuring, such as the sale or termination of a line of business; closure of business locations in a country or region or relocation of activities from one country or region to another; changes in management structure; and fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. [Refer: Classes of other provisions [domain]]" } } }, "auth_ref": [ "r406" ] }, "ifrs-full_RetainedEarnings": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RetainedEarnings", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAttributableToOwnersOfParent", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Retained earnings", "label": "Retained earnings" } }, "en": { "role": { "documentation": "A component of equity representing the entity's cumulative undistributed earnings or deficit." } } }, "auth_ref": [ "r384", "r386" ] }, "ifrs-full_RetainedEarningsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RetainedEarningsMember", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Retained earnings", "label": "Retained earnings [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing an entity's cumulative undistributed earnings or deficit." } } }, "auth_ref": [ "r6", "r380" ] }, "bti_RetainedEarningsOtherMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetainedEarningsOtherMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retained earnings - Other", "label": "Retained Earnings Other [Member]", "documentation": "Retained earnings other." } } }, "auth_ref": [] }, "bti_RetainedEarningsTreasurySharesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetainedEarningsTreasurySharesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retained earnings - Treasury shares", "label": "Retained Earnings Treasury Shares [Member]", "documentation": "Retained earnings treasury shares." } } }, "auth_ref": [] }, "bti_RetiredMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetiredMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retired members", "label": "Retired [Member]", "documentation": "Retired members." } } }, "auth_ref": [] }, "bti_RetirementBenefitSchemesAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetirementBenefitSchemesAbstract", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefit schemes", "label": "Retirement Benefit Schemes [Abstract]", "documentation": "Retirement Benefit Schemes" } } }, "auth_ref": [] }, "bti_RetirementBenefitSchemesValuationFrequency": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetirementBenefitSchemesValuationFrequency", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Valuation frequency", "label": "Retirement Benefit Schemes Valuation Frequency", "documentation": "Retirement Benefit Schemes Valuation Frequency" } } }, "auth_ref": [] }, "bti_RetirementBenefitsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RetirementBenefitsMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Retirement benefits", "label": "Retirement Benefits [Member]", "documentation": "Retirement Benefits" } } }, "auth_ref": [] }, "ifrs-full_RevaluationSurplusMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RevaluationSurplusMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Revaluation reserve", "label": "Revaluation surplus [member]" } }, "en": { "role": { "documentation": "This member stands for a component of equity representing accumulated revaluation surplus on the revaluation of assets recognised in other comprehensive income. [Refer: Other comprehensive income]" } } }, "auth_ref": [ "r75", "r204", "r380" ] }, "ifrs-full_Revenue": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "Revenue", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossFromOperatingActivities", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofGeographicalInformationofExternalRevenueDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Revenue", "label": "Revenue" } }, "en": { "role": { "documentation": "The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims." } } }, "auth_ref": [ "r47", "r221", "r286", "r329", "r335", "r340", "r341", "r344", "r378", "r379", "r426" ] }, "ifrs-full_RevenueAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RevenueAbstract", "lang": { "en-us": { "role": { "label": "Revenue [abstract]" } } }, "auth_ref": [] }, "ifrs-full_RevenueFromDividends": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RevenueFromDividends", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Dividend income", "label": "Dividend income" } }, "en": { "role": { "documentation": "The amount of dividends recognised as income. Dividends are distributions of profits to holders of equity investments in proportion to their holdings of a particular class of capital." } } }, "auth_ref": [ "r578" ] }, "ifrs-full_RevenueFromSaleOfGoodsRelatedPartyTransactions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RevenueFromSaleOfGoodsRelatedPartyTransactions", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofTransactionsBetweenRelatedPartiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 revenue", "label": "Revenue from sale of goods, related party transactions" } }, "en": { "role": { "documentation": "The amount of revenue arising from the sale of goods in related party transactions. [Refer: Revenue; Total for all related parties [member]]" } } }, "auth_ref": [ "r403" ] }, "ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReversalOfImpairmentLossRecognisedInProfitOrLoss", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Released", "label": "Reversal of impairment loss recognised in profit or loss" } }, "en": { "role": { "documentation": "The amount of reversal of impairment loss recognised in profit or loss. [Refer: Reversal of impairment loss; Profit (loss)]" } } }, "auth_ref": [ "r142", "r145" ] }, "ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReversalOfImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reversal of impairment loss", "label": "Reversal of impairment loss recognised in profit or loss, property, plant and equipment" } }, "en": { "role": { "documentation": "The amount of reversal of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Reversal of impairment loss recognised in profit or loss; Property, plant and equipment]" } } }, "auth_ref": [ "r58", "r80" ] }, "ifrs-full_ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReversalOfImpairmentLossRecognisedInProfitOrLossTradeReceivables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reversal of impairment loss recognised in profit or loss, trade receivables", "label": "Reversal of impairment loss recognised in profit or loss, trade receivables" } }, "en": { "role": { "documentation": "The amount of reversal of impairment loss recognised in profit or loss for trade receivables. [Refer: Reversal of impairment loss recognised in profit or loss; Trade receivables]" } } }, "auth_ref": [ "r578" ] }, "ifrs-full_ReversalOfInventoryWritedown": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ReversalOfInventoryWritedown", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reversal of inventory write-down", "label": "Reversal of inventory write-down" } }, "en": { "role": { "documentation": "The amount recognised as a reduction in the amount of inventories recognised as an expense due to the reversal of any write-down of inventories resulting from an increase in net realisable value. [Refer: Inventories; Inventory write-down]" } } }, "auth_ref": [ "r58", "r108" ] }, "bti_RevolvingCreditFacility": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RevolvingCreditFacility", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Revolving credit facility", "label": "Revolving Credit Facility", "documentation": "Revolving credit facility." } } }, "auth_ref": [] }, "bti_RevolvingCreditFacilityAmountAvailable": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RevolvingCreditFacilityAmountAvailable", "crdr": "credit", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Remaining amount available", "label": "Revolving Credit Facility, Amount Available", "documentation": "Revolving Credit Facility, Amount Available" } } }, "auth_ref": [] }, "bti_ReynoldsAmericanFundedRetirementPlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReynoldsAmericanFundedRetirementPlanMember", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reynolds american funded retirement plan (PEP and Affiliates)", "label": "Reynolds American Funded Retirement Plan [Member]", "documentation": "Reynolds american funded retirement plan." } } }, "auth_ref": [] }, "bti_ReynoldsAmericanIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReynoldsAmericanIncMember", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofNetDebtMovementsDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails", "http://www.bat.com/role/IntangibleassetsScheduleofImpairmentChargeFromPossibleChangeinAssumptionsDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reynolds American", "label": "Reynolds American Inc [Member]", "documentation": "Reynolds American Inc." } } }, "auth_ref": [] }, "bti_ReynoldsDefendantsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ReynoldsDefendantsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Reynolds defendants", "label": "Reynolds Defendants [Member]", "documentation": "Reynolds Defendants." } } }, "auth_ref": [] }, "bti_RightOfUseAssetsReassessmentsModificationsAndTerminationsPropertyPlantAndEquipmentIncludingRightOfUseAssets": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RightOfUseAssetsReassessmentsModificationsAndTerminationsPropertyPlantAndEquipmentIncludingRightOfUseAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Right-of-use assets \u2212 reassessments, modifications and terminations", "label": "Right-Of-Use Assets Reassessments, Modifications And Terminations, Property, Plant And Equipment Including Right-Of-Use Assets", "documentation": "Right-of-use assets reassessments, modifications and terminations property plant and equipment." } } }, "auth_ref": [] }, "ifrs-full_RightofuseAssetsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RightofuseAssetsMember", "presentation": [ "http://www.bat.com/role/PropertyPlantAndEquipmentScheduleofLeaseholdPropertyNetBookValueMovementsDetails", "http://www.bat.com/role/PropertyPlantandEquipmentAdditionalInformationDetails", "http://www.bat.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Right-of-use assets", "label": "Right-of-use assets [member]" } }, "en": { "role": { "documentation": "This member stands for right-of-use assets. [Refer: Right-of-use assets]" } } }, "auth_ref": [ "r238" ] }, "bti_RisingSunPartnersLPMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RisingSunPartnersLPMember", "presentation": [ "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rising Sun Partners LP", "label": "Rising Sun Partners LP [Member]", "documentation": "Rising Sun Partners LP" } } }, "auth_ref": [] }, "ifrs-full_RiskExposuresAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RiskExposuresAxis", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Risk variables [axis]", "label": "Risk variables [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r257" ] }, "ifrs-full_RiskExposuresDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "RiskExposuresDomain", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Risk variables", "label": "Risk variables [domain]" } }, "en": { "role": { "documentation": "This member stands for the risk variables. It also represents the standard value for the 'Risk variables' axis if no other member is used." } } }, "auth_ref": [ "r257" ] }, "bti_RothmansGroupMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RothmansGroupMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rothmans Group", "label": "Rothmans Group [Member]", "documentation": "Rothmans Group." } } }, "auth_ref": [] }, "bti_RothmansMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RothmansMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Rothmans", "label": "Rothmans [Member]", "documentation": "Rothmans." } } }, "auth_ref": [] }, "bti_RoyaltyRateAwardedAsPercentageOfSales": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RoyaltyRateAwardedAsPercentageOfSales", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Royalty rate awarded", "label": "Royalty Rate Awarded As Percentage Of Sales", "documentation": "Royalty Rate Awarded As Percentage Of Sales" } } }, "auth_ref": [] }, "ecd_Rule10b51ArrAdoptedFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "Rule10b51ArrAdoptedFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Rule 10b5-1 Arrangement Adopted [Flag]", "terseLabel": "Rule 10b5-1 Arrangement Adopted" } } }, "auth_ref": [ "r551" ] }, "ecd_Rule10b51ArrTrmntdFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "Rule10b51ArrTrmntdFlag", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Rule 10b5-1 Arrangement Terminated [Flag]", "terseLabel": "Rule 10b5-1 Arrangement Terminated" } } }, "auth_ref": [ "r551" ] }, "bti_RussianAndBelarusianBusinessesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "RussianAndBelarusianBusinessesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Russian and Belarusian Businesses", "label": "Russian and Belarusian Businesses [Member]", "documentation": "Russian and Belarusian Businesses" } } }, "auth_ref": [] }, "currency_SAR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "SAR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Saudi Arabia, Riyals", "label": "Saudi Arabia, Riyals" } } }, "auth_ref": [] }, "bti_SECRegulationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SECRegulationsMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesAuditorsRemunerationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "SEC Regulations", "label": "SEC Regulations [Member]", "documentation": "SEC Regulations." } } }, "auth_ref": [] }, "bti_SFNTCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SFNTCMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "SFNTC", "label": "SFNTC [Member]", "documentation": "Santa Fe Natural Tobacco Company." } } }, "auth_ref": [] }, "country_SG": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "SG", "presentation": [ "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Singapore", "label": "SINGAPORE" } } }, "auth_ref": [] }, "bti_SONIAMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SONIAMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "SONIA", "label": "SONIA [Member]", "documentation": "SONIA" } } }, "auth_ref": [] }, "bti_STMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "STMember", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "ST", "label": "ST [Member]", "documentation": "ST" } } }, "auth_ref": [] }, "ifrs-full_SalesAndMarketingExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SalesAndMarketingExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Marketing costs in operating expenses", "label": "Sales and marketing expense" } }, "en": { "role": { "documentation": "The amount of expense relating to the marketing and selling of goods or services." } } }, "auth_ref": [ "r585" ] }, "bti_SamfruitMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SamfruitMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Samfruit", "label": "Samfruit [Member]", "documentation": "Samfruit." } } }, "auth_ref": [] }, "bti_SanityGroupGmbHMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SanityGroupGmbHMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sanity Group GmbH", "label": "Sanity Group GmbH [Member]", "documentation": "Sanity Group GmbH" } } }, "auth_ref": [] }, "srt_ScenarioForecastMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ScenarioForecastMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Forecast", "label": "Forecast [Member]", "documentation": "Information reported for future period. Excludes information expected to be reported in future period for effect on historical fact." } } }, "auth_ref": [ "r628" ] }, "srt_ScenarioUnspecifiedDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ScenarioUnspecifiedDomain", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Scenario [Domain]", "label": "Scenario [Domain]", "documentation": "Scenario reported, distinguishing information from actual fact. Includes, but is not limited to, pro forma and forecast. Excludes actual facts." } } }, "auth_ref": [ "r374" ] }, "srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Investment, Name [Axis]", "label": "Investment, Name [Axis]", "documentation": "Information by name of investment including named security. Excludes entity that is consolidated." } } }, "auth_ref": [] }, "bti_SchemeLiabilitiesIncludedInBuyOutContract": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SchemeLiabilitiesIncludedInBuyOutContract", "crdr": "credit", "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Retirement plan liabilities", "label": "Scheme Liabilities Included in Buy Out Contract", "documentation": "Scheme liabilities included in buy-out contract." } } }, "auth_ref": [] }, "bti_SchemeMembershipAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SchemeMembershipAxis", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Scheme Membership", "label": "Scheme Membership [Axis]", "documentation": "Scheme membership axis." } } }, "auth_ref": [] }, "bti_SchemeMembershipMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SchemeMembershipMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofSchemeLiabilitiesbySchemeMembershipDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Scheme Membership Member", "label": "Scheme Membership [Member]", "documentation": "Scheme membership." } } }, "auth_ref": [] }, "bti_SchemesInSurplusOnlyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SchemesInSurplusOnlyMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Schemes in surplus only", "label": "Schemes In Surplus Only [Member]", "documentation": "Schemes in surplus only." } } }, "auth_ref": [] }, "bti_SecuredBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SecuredBorrowings", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Borrowing amounts secured on group assets", "label": "Secured Borrowings", "documentation": "Secured borrowings." } } }, "auth_ref": [] }, "dei_Security12bTitle": { "xbrltype": "securityTitleItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "Security12bTitle", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Title of 12(b) Security", "label": "Title of 12(b) Security", "documentation": "Title of a 12(b) registered security." } } }, "auth_ref": [ "r462" ] }, "dei_SecurityExchangeName": { "xbrltype": "edgarExchangeCodeItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "SecurityExchangeName", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Security Exchange Name", "label": "Security Exchange Name", "documentation": "Name of the Exchange on which a security is registered." } } }, "auth_ref": [ "r464" ] }, "srt_SegmentGeographicalDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "SegmentGeographicalDomain", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Geographical [Domain]", "label": "Geographical [Domain]", "documentation": "Geographical area." } } }, "auth_ref": [ "r353", "r355", "r358", "r360", "r361", "r362", "r363", "r364", "r366", "r367", "r368", "r369", "r370", "r371" ] }, "ifrs-full_SegmentsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SegmentsAxis", "presentation": [ "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Segments [axis]", "label": "Segments [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r146", "r236", "r333", "r398", "r441" ] }, "ifrs-full_SegmentsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SegmentsDomain", "presentation": [ "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Segments [domain]", "label": "Segments [domain]" } }, "en": { "role": { "documentation": "This member stands for all segments of an entity. It also represents the standard value for the 'Segments' axis if no other member is used." } } }, "auth_ref": [ "r146", "r236", "r339", "r398", "r441" ] }, "bti_SensitivityAdditionalVolumeDeclineHypothesisProvisionCalculation": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SensitivityAdditionalVolumeDeclineHypothesisProvisionCalculation", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sensitivity additional volume decline, hypothesis, provision calculation", "label": "Sensitivity Additional Volume Decline, Hypothesis, Provision Calculation", "documentation": "Sensitivity Additional Volume Decline, Hypothesis, Provision Calculation" } } }, "auth_ref": [] }, "bti_SensitivityFactorRateToCurrencyRiskExposure": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SensitivityFactorRateToCurrencyRiskExposure", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Currency risk sensitivity factor", "label": "Sensitivity Factor Rate To Currency Risk Exposure", "documentation": "Sensitivity factor rate to currency risk exposure." } } }, "auth_ref": [] }, "bti_SensitivityOnChangesInPricingPlansHypothesisProvisionCalculation": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SensitivityOnChangesInPricingPlansHypothesisProvisionCalculation", "presentation": [ "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sensitivity on changes in pricing plans, hypothesis, provision calculation", "label": "Sensitivity On Changes In Pricing Plans, Hypothesis, Provision Calculation", "documentation": "Sensitivity On Changes In Pricing Plans, Hypothesis, Provision Calculation" } } }, "auth_ref": [] }, "bti_SeptemberTwoThousandAndTwentyOneEquityClassifiedBondsOneAndTwoMemberMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SeptemberTwoThousandAndTwentyOneEquityClassifiedBondsOneAndTwoMemberMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "September 2021 equity classified bonds 1&2", "label": "September Two Thousand And Twenty One Equity Classified Bonds One And Two Member [Member]", "documentation": "September two thousand and twenty one equity classified bonds one and two member." } } }, "auth_ref": [] }, "bti_SequanaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SequanaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sequana", "label": "Sequana [Member]", "documentation": "Sequana." } } }, "auth_ref": [] }, "bti_SettlementOfTobaccoLitigationInCanadaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementOfTobaccoLitigationInCanadaMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesCanadaProposedPlansAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement of tobacco litigation in Canada", "label": "Settlement Of Tobacco Litigation in Canada [Member]", "documentation": "Settlement Of Tobacco Litigation in Canada" } } }, "auth_ref": [] }, "bti_SettlementOfTobaccoLitigationInCanadaUpfrontPaymentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementOfTobaccoLitigationInCanadaUpfrontPaymentMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement of tobacco litigation in Canada, upfront payment", "label": "Settlement Of Tobacco Litigation in Canada, Upfront Payment [Member]", "documentation": "Settlement Of Tobacco Litigation in Canada, Upfront Payment" } } }, "auth_ref": [] }, "bti_SettlementProceeds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementProceeds", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement proceeds from judgement", "label": "Settlement Proceeds", "documentation": "Settlement proceeds." } } }, "auth_ref": [] }, "bti_SettlementReceived": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementReceived", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement received", "label": "Settlement Received", "documentation": "Settlement received." } } }, "auth_ref": [] }, "bti_SettlementTypeAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementTypeAxis", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement Type", "label": "Settlement Type [Axis]", "documentation": "Settlement type." } } }, "auth_ref": [] }, "bti_SettlementTypeDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementTypeDomain", "presentation": [ "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofMaturityDatesofGrosssettledDerivativeFinancialInstrumentsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Settlement Type [Domain]", "label": "Settlement Type [Domain]", "documentation": "Settlement Type [Domain]" } } }, "auth_ref": [] }, "bti_SettlementsPastServiceCostsAndDefinedContributionCostsReportedAsPartOfRestructuringCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SettlementsPastServiceCostsAndDefinedContributionCostsReportedAsPartOfRestructuringCosts", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Employee benefit costs, in respect of settlements, past service costs and defined contribution costs reported as part of restructuring costs", "label": "Settlements Past Service Costs And Defined Contribution Costs Reported As Part Of Restructuring Costs", "documentation": "Settlements, past service costs and defined contribution costs reported as part of the restructuring costs." } } }, "auth_ref": [] }, "bti_SevenPointSevenFiveZeroPercentageNotesDueTwoThousandAndThirtyTwoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SevenPointSevenFiveZeroPercentageNotesDueTwoThousandAndThirtyTwoMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "7.750% Notes due 2032", "label": "Seven Point Seven Five Zero Percentage Notes Due Two Thousand And Thirty Two [Member]", "documentation": "Seven Point Seven Five Zero Percentage Notes Due Two Thousand And Thirty Two" } } }, "auth_ref": [] }, "bti_SevenPointZeroEightOnePercentageNotesDueTwoThousandAndFiftyThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SevenPointZeroEightOnePercentageNotesDueTwoThousandAndFiftyThreeMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "7.081% Notes due 2053", "label": "Seven Point Zero Eight One Percentage Notes Due Two Thousand And Fifty Three [Member]", "documentation": "Seven Point Zero Eight One Percentage Notes Due Two Thousand And Fifty Three" } } }, "auth_ref": [] }, "bti_SevenPointZeroSevenNinePercentageNotesDueTwoThousandAndFortyThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SevenPointZeroSevenNinePercentageNotesDueTwoThousandAndFortyThreeMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "7.079% Notes due 2043", "label": "Seven Point Zero Seven Nine Percentage Notes Due Two Thousand And Forty Three [Member]", "documentation": "Seven Point Zero Seven Nine Percentage Notes Due Two Thousand And Forty Three" } } }, "auth_ref": [] }, "bti_SevereWeatherEventsAndOtherNaturalConditionsCosts": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SevereWeatherEventsAndOtherNaturalConditionsCosts", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": "bti_SustainabilityCostsRecognisedInProfitOrLoss", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Severe weather events and other natural conditions", "label": "Severe Weather Events and Other Natural Conditions Costs", "documentation": "Severe Weather Events and Other Natural Conditions Costs" } } }, "auth_ref": [] }, "bti_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate1": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate1", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Average share price volatility FMCG comparator group (%)", "label": "Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate1", "documentation": "Share based compensation arrangement by share based payment award fair value assumptions expected volatility rate 1." } } }, "auth_ref": [] }, "bti_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageIndexCorrelationRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageIndexCorrelationRate", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Average correlation FMCG comparator group (%)", "label": "Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Index Correlation Rate", "documentation": "Share based compensation arrangement by share based payment award fair value assumptions weighted average index correlation rate." } } }, "auth_ref": [] }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "All Award Types", "terseLabel": "All Award Types" } } }, "auth_ref": [] }, "bti_ShareBuyBackProgrammeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareBuyBackProgrammeMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share Buy-Back Programme", "label": "Share Buy-Back Programme [Member]", "documentation": "Share Buy-Back Programme" } } }, "auth_ref": [] }, "bti_ShareBuyBackProgrammeTransactionCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareBuyBackProgrammeTransactionCost", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share buy-back programme, transaction cost", "label": "Share Buy-Back Programme, Transaction Cost", "documentation": "Cancellation Of" } } }, "auth_ref": [] }, "bti_ShareOfComprehensiveIncomeLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareOfComprehensiveIncomeLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "crdr": "credit", "calculation": { "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total comprehensive income (note 9)", "terseLabel": "Total comprehensive income", "label": "Share Of Comprehensive Income Loss Of Associates And Joint Ventures Accounted For Using Equity Method", "documentation": "The entity's share of the comprehensive income (loss) of associates and joint ventures accounted for using the equity method." } } }, "auth_ref": [] }, "bti_ShareOfNCRCosts": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareOfNCRCosts", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share of NCR costs", "label": "Share Of N C R Costs", "documentation": "Share of NCR costs." } } }, "auth_ref": [] }, "ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillBeReclassifiedToProfitOrLossNetOfTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails": { "parentTag": "bti_ShareOfComprehensiveIncomeLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "weight": 1.0, "order": 3.0 }, "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "\u2013 share of OCI, net of tax", "verboseLabel": "Items that may be reclassified to profit and loss", "label": "Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax" } }, "en": { "role": { "documentation": "Share of the other comprehensive income of associates and joint ventures accounted for using the equity method that will be reclassified to profit or loss, net of tax." } } }, "auth_ref": [ "r52" ] }, "ifrs-full_ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShareOfOtherComprehensiveIncomeOfAssociatesAndJointVenturesAccountedForUsingEquityMethodThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupStatementofComprehensiveIncome": { "parentTag": "ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails": { "parentTag": "bti_ShareOfComprehensiveIncomeLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/CapitalandreservesSummaryofEquityAttributedtoOwnersofTheParentMovementsinOtherReservesandRetainedEarningsDetails", "http://www.bat.com/role/GroupStatementofComprehensiveIncome" ], "lang": { "en-us": { "role": { "terseLabel": "Associates \u2013 share of OCI, net of tax", "verboseLabel": "Items that will not be reclassified to profit and loss", "label": "Share of other comprehensive income of associates and joint ventures accounted for using equity method that will not be reclassified to profit or loss, net of tax" } }, "en": { "role": { "documentation": "Share of the other comprehensive income of associates and joint ventures accounted for using the equity method that will not be reclassified to profit or loss, net of tax." } } }, "auth_ref": [ "r52" ] }, "ifrs-full_ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod", "crdr": "credit", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share of loss of associates", "label": "Share of profit (loss) of associates accounted for using equity method" } }, "en": { "role": { "documentation": "The entity's share of the profit (loss) of associates accounted for using the equity method. [Refer: Total for all associates [member]; Investments accounted for using equity method; Profit (loss)]" } } }, "auth_ref": [ "r585" ] }, "ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupCashFlowStatement": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails": { "parentTag": "ifrs-full_ProfitLoss", "weight": 1.0, "order": 2.0 }, "http://www.bat.com/role/GroupIncomeStatement": { "parentTag": "ifrs-full_ProfitLossBeforeTax", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/GroupCashFlowStatement", "http://www.bat.com/role/GroupIncomeStatement", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share of post-tax results of associates and joint ventures", "negatedTerseLabel": "Share of post-tax results of associates and joint ventures", "totalLabel": "Total post-tax results of associates and joint ventures", "verboseLabel": "Post-tax results of associates and joint ventures", "label": "Share of profit (loss) of associates and joint ventures accounted for using equity method" } }, "en": { "role": { "documentation": "The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Total for all associates [member]; Investments accounted for using equity method; Total for all joint ventures [member]; Profit (loss)]" } } }, "auth_ref": [ "r49", "r331", "r338" ] }, "bti_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeDisposalOfInvestment": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethodBeforeDisposalOfInvestment", "crdr": "credit", "calculation": { "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails": { "parentTag": "bti_ShareOfComprehensiveIncomeLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails": { "parentTag": "ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Post-tax results of associates and joint ventures", "label": "Share Of Profit Loss Of Associates And Joint Ventures Accounted For Using Equity Method, Before Disposal Of Investment", "documentation": "Share Of Profit Loss Of Associates And Joint Ventures Accounted For Using Equity Method, Before Disposal Of Investment" } } }, "auth_ref": [] }, "bti_ShareOptionsEarningsLossPerShare": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareOptionsEarningsLossPerShare", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": "ifrs-full_DilutedEarningsLossPerShare", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Share options (in GBP pence per share)", "label": "Share Options Earnings Loss Per Share", "documentation": "Share options earnings (loss) per share." } } }, "auth_ref": [] }, "ifrs-full_ShareOptionsMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShareOptionsMember", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share options", "label": "Share options [member]" } }, "en": { "role": { "documentation": "This member stands for share options." } } }, "auth_ref": [ "r606" ] }, "ifrs-full_SharePremium": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SharePremium", "crdr": "credit", "calculation": { "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails": { "parentTag": "ifrs-full_Equity", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummaryofUnconsolidatedEquityResultsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share premium", "label": "Share premium" } }, "en": { "role": { "documentation": "The amount received or receivable from the issuance of the entity's shares in excess of nominal value." } } }, "auth_ref": [ "r384" ] }, "bti_SharePremiumCapitalRedemptionAndMergerReserves": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharePremiumCapitalRedemptionAndMergerReserves", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_EquityAttributableToOwnersOfParent", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet" ], "lang": { "en-us": { "role": { "terseLabel": "Share premium, capital redemption and merger reserves", "label": "Share Premium Capital Redemption And Merger Reserves", "documentation": "Share premium capital redemption and merger reserves." } } }, "auth_ref": [] }, "bti_SharePremiumCapitalRedemptionAndMergerReservesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharePremiumCapitalRedemptionAndMergerReservesMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails", "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Share premium, capital redemption and merger reserves", "label": "Share Premium Capital Redemption And Merger Reserves [Member]", "documentation": "Share premium capital redemption and merger reserves." } } }, "auth_ref": [] }, "ifrs-full_SharePremiumMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SharePremiumMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofCompositionofSharePremiumAccountCapitalRedemptionReservesandMergerReservesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share premium account", "label": "Share premium [member]" } }, "en": { "role": { "documentation": "This member stands for the amount received or receivable from issuance of the entity's shares in excess of nominal value." } } }, "auth_ref": [ "r6" ] }, "bti_SharePriceVolatilityCalculationPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharePriceVolatilityCalculationPeriod", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share price volatility calculation period", "label": "Share Price Volatility Calculation Period", "documentation": "Share price volatility calculation period." } } }, "auth_ref": [] }, "srt_ShareRepurchaseProgramAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ShareRepurchaseProgramAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share Repurchase Program [Axis]", "label": "Share Repurchase Program [Axis]", "documentation": "Information by share repurchase program." } } }, "auth_ref": [] }, "srt_ShareRepurchaseProgramDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "ShareRepurchaseProgramDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CapitalandreservesSummaryofMovementsofCalledUpShareCapitalDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share Repurchase Program [Domain]", "label": "Share Repurchase Program [Domain]", "documentation": "Name of share repurchase program." } } }, "auth_ref": [] }, "bti_ShareRewardSchemeSRSMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareRewardSchemeSRSMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share Reward Scheme (SRS)", "label": "Share Reward Scheme S R S [Member]", "documentation": "Share reward scheme SRS and international share reward scheme ISRS." } } }, "auth_ref": [] }, "bti_ShareholderReturnMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShareholderReturnMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total Shareholder Return", "label": "Shareholder Return [Member]", "documentation": "Shareholder return." } } }, "auth_ref": [] }, "bti_SharesHeldInEmployeeShareOwnershipTrustsRelatedCost": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharesHeldInEmployeeShareOwnershipTrustsRelatedCost", "crdr": "debit", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cost of own shares held in employee share ownership trusts", "label": "Shares Held In Employee Share Ownership Trusts Related Cost", "documentation": "Shares held in employee share ownership trusts related cost." } } }, "auth_ref": [] }, "bti_SharesRepurchasedAndNotCancelledMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharesRepurchasedAndNotCancelledMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Shares repurchased and not cancelled", "label": "Shares Repurchased And Not Cancelled [Member]", "documentation": "Shares repurchased and not cancelled." } } }, "auth_ref": [] }, "bti_SharesaveSchemeSAYEMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SharesaveSchemeSAYEMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Sharesave Scheme (SAYE)", "label": "Sharesave Scheme S A Y E [Member]", "documentation": "Sharesave scheme (SAYE)." } } }, "auth_ref": [] }, "bti_ShortTermCreditFacilityMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ShortTermCreditFacilityMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCreditRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Short Term Credit Facility", "label": "Short Term Credit Facility [Member]", "documentation": "Short term credit facility." } } }, "auth_ref": [] }, "ifrs-full_ShorttermBorrowings": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ShorttermBorrowings", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentLiabilities", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Borrowings", "terseLabel": "Current borrowings", "label": "Current borrowings" } }, "en": { "role": { "documentation": "The amount of current borrowings. [Refer: Borrowings]" } } }, "auth_ref": [ "r581" ] }, "ifrs-full_SignificantInvestmentsInAssociatesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SignificantInvestmentsInAssociatesAxis", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associates [axis]", "label": "Associates [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r131", "r133", "r228" ] }, "ifrs-full_SignificantInvestmentsInAssociatesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SignificantInvestmentsInAssociatesDomain", "presentation": [ "http://www.bat.com/role/AssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/AssociatesandJointVenturesScheduleofProfitLossofAssociatesandJointVenturesAccountedforUsingEquityMethodDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofFinancialInformationoftheGroupsAssociatesandJointVenturesDetails", "http://www.bat.com/role/AssociatesandJointVenturesSummaryofGroupsShareoftheResultofAssociatesandJointVenturesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofPrincipalAssociateUndertakingsDetails", "http://www.bat.com/role/OtheroperatingexpensesPartialdisposalofsharesinITCAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Associates [domain]", "label": "Associates [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Associates' axis if no other member is used." } } }, "auth_ref": [ "r131", "r133", "r228" ] }, "ifrs-full_SignificantInvestmentsInSubsidiariesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SignificantInvestmentsInSubsidiariesAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Subsidiaries [axis]", "label": "Subsidiaries [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r131", "r133", "r227" ] }, "ifrs-full_SignificantInvestmentsInSubsidiariesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SignificantInvestmentsInSubsidiariesDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/IntangibleassetsrevisedCanadaGoodwillImpairmentDetails", "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Subsidiaries [domain]", "label": "Subsidiaries [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value for the 'Subsidiaries' axis if no other member is used." } } }, "auth_ref": [ "r131", "r133", "r227" ] }, "bti_SiteCleanUpCostsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SiteCleanUpCostsMember", "presentation": [ "http://www.bat.com/role/RestructuringandIntegrationCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Site clean up costs", "label": "Site Clean Up Costs [Member]", "documentation": "Site Clean Up Costs" } } }, "auth_ref": [] }, "bti_SixPointFourTwoOnePercentageNotesDueTwoThousandAndThirtyThreeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SixPointFourTwoOnePercentageNotesDueTwoThousandAndThirtyThreeMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "6.421% Notes due 2033", "label": "Six Point Four Two One Percentage Notes Due Two Thousand And Thirty Three [Member]", "documentation": "Six Point Four Two One Percentage Notes Due Two Thousand And Thirty Three" } } }, "auth_ref": [] }, "bti_SixPointThreeFourThreePercentageNotesDueTwoThousandAndThirtyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SixPointThreeFourThreePercentageNotesDueTwoThousandAndThirtyMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "6.343% Notes due 2030", "label": "Six Point Three Four Three Percentage Notes Due Two Thousand And Thirty [Member]", "documentation": "Six Point Three Four Three Percentage Notes Due Two Thousand And Thirty" } } }, "auth_ref": [] }, "bti_SocialContributionClaimsSoldToFinancialInstitutions": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SocialContributionClaimsSoldToFinancialInstitutions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Social contribution claims sold to financial institutions", "label": "Social Contribution Claims Sold To Financial Institutions", "documentation": "Social contribution claims sold to financial institutions." } } }, "auth_ref": [] }, "bti_SocialSecurityAndOtherTaxationExcludingValueAddedTaxDutyAndExcise": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SocialSecurityAndOtherTaxationExcludingValueAddedTaxDutyAndExcise", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Social security and other taxation", "label": "Social Security And Other Taxation Excluding Value Added Tax Duty And Excise", "documentation": "Social security and other taxation, excluding value added tax, duty and excise." } } }, "auth_ref": [] }, "ifrs-full_SocialSecurityContributions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SocialSecurityContributions", "crdr": "debit", "calculation": { "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails": { "parentTag": "ifrs-full_EmployeeBenefitsExpense", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Social security costs", "label": "Social security contributions" } }, "en": { "role": { "documentation": "A class of employee benefits expense that represents social security contributions. [Refer: Employee benefits expense]" } } }, "auth_ref": [ "r603" ] }, "bti_SoloMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SoloMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Solo", "label": "Solo [Member]", "documentation": "Solo" } } }, "auth_ref": [] }, "bti_SolvencyLiabilitiesBasisMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SolvencyLiabilitiesBasisMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Solvency liabilities basis", "label": "Solvency Liabilities Basis [Member]", "documentation": "Solvency liabilities basis." } } }, "auth_ref": [] }, "bti_SouzaCruzMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SouzaCruzMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Souza Cruz", "label": "Souza Cruz [Member]", "documentation": "Souza Cruz." } } }, "auth_ref": [] }, "bti_StateSettlementAgreementsAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StateSettlementAgreementsAmount", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "State settlement agreement", "label": "State Settlement Agreements Amount", "documentation": "State settlement agreements expense." } } }, "auth_ref": [] }, "bti_StateSettlementAgreementsEnforcementAndValidityUSTobaccoRelatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StateSettlementAgreementsEnforcementAndValidityUSTobaccoRelatedMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewScheduleofCategoriesofTobaccoRelatedActionsPendingAgainstGroupCompaniesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "State Settlement Agreements \u2013 Enforcement and Validity", "label": "State Settlement Agreements Enforcement And Validity U S Tobacco Related [Member]", "documentation": "State settlement agreements enforcement and validity, US tobacco related." } } }, "auth_ref": [] }, "srt_StatementGeographicalAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "StatementGeographicalAxis", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsheldatfairvalueAdditionalInformationDetails", "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Geographical [Axis]", "label": "Geographical [Axis]", "documentation": "Information by geographical components." } } }, "auth_ref": [ "r353", "r355", "r358", "r360", "r361", "r362", "r363", "r364", "r366", "r367", "r368", "r369", "r370", "r371" ] }, "ifrs-full_StatementOfCashFlowsAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfCashFlowsAbstract", "lang": { "en-us": { "role": { "label": "Statement of cash flows [abstract]" } } }, "auth_ref": [] }, "bti_StatementOfCashFlowsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StatementOfCashFlowsLineItems", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Statement [Line Items]", "label": "Statement Of Cash Flows [Line Items]", "documentation": "Statement [Line Items]" } } }, "auth_ref": [] }, "bti_StatementOfCashFlowsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StatementOfCashFlowsTable", "presentation": [ "http://www.bat.com/role/GroupCashFlowStatementParenthetical" ], "lang": { "en-us": { "role": { "terseLabel": "Statement [Table]", "label": "Statement of Cash Flows [Table]", "documentation": "Statement [Table]" } } }, "auth_ref": [] }, "ifrs-full_StatementOfChangesInEquityAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfChangesInEquityAbstract", "lang": { "en-us": { "role": { "label": "Statement of changes in equity [abstract]" } } }, "auth_ref": [] }, "ifrs-full_StatementOfChangesInEquityLineItems": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfChangesInEquityLineItems", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Statement of changes in equity [line items]", "label": "Statement of changes in equity [line items]" } }, "en": { "role": { "documentation": "Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table." } } }, "auth_ref": [] }, "ifrs-full_StatementOfChangesInEquityTable": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfChangesInEquityTable", "presentation": [ "http://www.bat.com/role/GroupStatementofChangesinEquity" ], "lang": { "en-us": { "role": { "terseLabel": "Statement of changes in equity [table]", "label": "Statement of changes in equity [table]" } }, "en": { "role": { "documentation": "Schedule disclosing information related to changes in equity." } } }, "auth_ref": [ "r6" ] }, "ifrs-full_StatementOfComprehensiveIncomeAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfComprehensiveIncomeAbstract", "lang": { "en-us": { "role": { "label": "Statement of comprehensive income [abstract]" } } }, "auth_ref": [] }, "ifrs-full_StatementOfFinancialPositionAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementOfFinancialPositionAbstract", "lang": { "en-us": { "role": { "label": "Statement of financial position [abstract]" } } }, "auth_ref": [] }, "srt_StatementScenarioAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "StatementScenarioAxis", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails", "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Scenario [Axis]", "label": "Scenario [Axis]", "documentation": "Information by scenario reported, distinguishing information from actual fact. Includes, but is not limited to, pro forma and forecast. Excludes actual facts." } } }, "auth_ref": [ "r374" ] }, "ifrs-full_StatementThatEntityHasAppliedExceptionToDeferredTaxAccountingRelatedToPillarTwoIncomeTaxes": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "StatementThatEntityHasAppliedExceptionToDeferredTaxAccountingRelatedToPillarTwoIncomeTaxes", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Statement that entity has applied exception to deferred tax accounting related to Pillar Two income taxes", "label": "Statement that entity has applied exception to deferred tax accounting related to Pillar Two income taxes" } }, "en": { "role": { "documentation": "The statement that the entity has applied the exception to recognising and disclosing information about deferred tax assets and liabilities related to Pillar Two income taxes." } } }, "auth_ref": [ "r72" ] }, "bti_SteadyStateLLCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SteadyStateLLCMember", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssociatedundertakingsDetails", "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Steady State LLC", "label": "Steady State LLC [Member]", "documentation": "Steady State LLC" } } }, "auth_ref": [] }, "ecd_StkPrcOrTsrEstimationMethodTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "StkPrcOrTsrEstimationMethodTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" ], "lang": { "en-us": { "role": { "label": "Stock Price or TSR Estimation Method [Text Block]", "terseLabel": "Stock Price or TSR Estimation Method" } } }, "auth_ref": [ "r483", "r494", "r504", "r537" ] }, "us-gaap_StockAppreciationRightsSARSMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "StockAppreciationRightsSARSMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Stock Appreciation Rights (SARs) [Member]", "terseLabel": "Stock Appreciation Rights (SARs)" } } }, "auth_ref": [] }, "bti_StockReliefMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StockReliefMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Stock relief", "label": "Stock Relief [Member]", "documentation": "Stock Relief" } } }, "auth_ref": [] }, "srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased": { "xbrltype": "sharesItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share repurchase program, authorized, number of shares (in shares)", "label": "Share Repurchase Program, Authorized, Number of Shares", "documentation": "Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership." } } }, "auth_ref": [] }, "bti_StructureOfCompanyAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StructureOfCompanyAxis", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Structure Of Company", "label": "Structure Of Company [Axis]", "documentation": "Structure of company." } } }, "auth_ref": [] }, "bti_StructureOfCompanyDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "StructureOfCompanyDomain", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Structure Of Company [Domain]", "label": "Structure Of Company [Domain]", "documentation": "Structure Of Company [Domain]" } } }, "auth_ref": [] }, "srt_SubsidiariesMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "SubsidiariesMember", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Subsidiaries", "label": "Subsidiaries [Member]", "documentation": "Entity in which controlling financial interest is held. Includes, but is not limited to, variable interest entity (VIE) consolidated by primary beneficiary. Excludes entity in which broker-dealer holds controlling financial interest but control is likely to be temporary." } } }, "auth_ref": [] }, "ifrs-full_SubsidiariesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SubsidiariesMember", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofHeadlineEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Subsidiaries", "label": "Total for all subsidiaries [member]" } }, "en": { "role": { "documentation": "This member stands for entities that are controlled by another entity." } } }, "auth_ref": [ "r121", "r131", "r133", "r227" ] }, "bti_SummarisedFinancialInformationOfSubsidiariesSubjectToRestrictionsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummarisedFinancialInformationOfSubsidiariesSubjectToRestrictionsLineItems", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information Of Subsidiaries Subject To Restrictions [Line Items]", "label": "Summarised Financial Information Of Subsidiaries Subject To Restrictions [Line Items]", "documentation": "Summarised Financial Information Of Subsidiaries Subject To Restrictions" } } }, "auth_ref": [] }, "bti_SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsAbstract", "lang": { "en-us": { "role": { "label": "Summarised Financial Information Of Subsidiaries With Material Noncontrolling Interests [Abstract]", "documentation": "Summarised financial information of subsidiaries with material non-controlling interests." } } }, "auth_ref": [] }, "bti_SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information of Subsidiaries With Material Noncontrolling Interests Explanatory", "label": "Summarised Financial Information Of Subsidiaries With Material Noncontrolling Interests Explanatory [Table Text Block]", "documentation": "Summarised financial information of subsidiaries with material non-controlling interests." } } }, "auth_ref": [] }, "bti_SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsLineItems", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information of Subsidiaries with Material Non-controlling Interests [Line Items]", "label": "Summarised Financial Information Of Subsidiaries With Material Noncontrolling Interests [Line Items]", "documentation": "Summarised financial information of subsidiaries with material non-controlling interests." } } }, "auth_ref": [] }, "bti_SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummarisedFinancialInformationOfSubsidiariesWithMaterialNoncontrollingInterestsTable", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesSummaryofBreakdownofCurrentAssetsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiariesSubjecttoSignificantRestrictionsDetails", "http://www.bat.com/role/InterestsinsubsidiariesSummaryofFinancialInformationofSubsidiarieswithMaterialNoncontrollingInterestsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Summarised Financial Information Of Subsidiaries With Material Noncontrolling Interests [Table]", "label": "Summarised Financial Information Of Subsidiaries With Material Noncontrolling Interests [Table]", "documentation": "Summarised Financial Information Of Subsidiaries With Material Non-controlling Interests Table" } } }, "auth_ref": [] }, "bti_SummaryOfReconciliationOfEarningsUsedToCalculateEarningsPerShareExplanatoryTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SummaryOfReconciliationOfEarningsUsedToCalculateEarningsPerShareExplanatoryTableTextBlock", "presentation": [ "http://www.bat.com/role/EarningspershareTables" ], "lang": { "en-us": { "role": { "terseLabel": "Summary of Reconciliation of Earnings Used To Calculate Earnings Per Share", "label": "Summary Of Reconciliation Of Earnings Used To Calculate Earnings Per Share Explanatory [Table Text Block]", "documentation": "Summary of reconciliation of earnings used to calculate earnings per share." } } }, "auth_ref": [] }, "ifrs-full_SupplierFinanceArrangementsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SupplierFinanceArrangementsAxis", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Supplier finance arrangements [axis]", "label": "Supplier finance arrangements [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table. This axis represents the financial liabilities that are part of a supplier finance arrangement." } } }, "auth_ref": [ "r195", "r196" ] }, "ifrs-full_SupplierFinanceArrangementsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SupplierFinanceArrangementsDomain", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Supplier finance arrangements [domain]", "label": "Supplier finance arrangements [domain]" } }, "en": { "role": { "documentation": "This member stands for the standard value of the \u2018Supplier finance arrangements\u2019 axis if no other member is used." } } }, "auth_ref": [ "r195", "r196" ] }, "bti_SupplyChainFinancingArrangementsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SupplyChainFinancingArrangementsMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Supply chain financing arrangements", "label": "Supply Chain Financing Arrangements [Member]", "documentation": "Supply chain financing arrangements." } } }, "auth_ref": [] }, "bti_SurplusDeficitInFundedPlansExcludingUnrecognisedSchemeSurpluses": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SurplusDeficitInFundedPlansExcludingUnrecognisedSchemeSurpluses", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Surplus (deficit) in funded plans excluding unrecognised scheme surpluses", "label": "Surplus (Deficit) In Funded Plans Excluding Unrecognised Scheme Surpluses", "documentation": "Surplus (deficit) in funded plans excluding unrecognised scheme surpluses." } } }, "auth_ref": [] }, "ifrs-full_SurplusDeficitInPlan": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "SurplusDeficitInPlan", "crdr": "debit", "calculation": { "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails" ], "lang": { "en-us": { "role": { "verboseLabel": "Surplus (deficit) in plan", "totalLabel": "Surplus (deficit) in plan", "label": "Surplus (deficit) in plan" } }, "en": { "role": { "documentation": "The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]]" } } }, "auth_ref": [ "r601" ] }, "bti_SurplusRestrictionPlanAssets": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SurplusRestrictionPlanAssets", "crdr": "debit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Surplus restriction, plan assets", "label": "Surplus Restriction, Plan Assets", "documentation": "Surplus Restriction, Plan Assets" } } }, "auth_ref": [] }, "bti_SustainabilityCostsCapitalExpenditures": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SustainabilityCostsCapitalExpenditures", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Sustainability costs - capital expenditures", "label": "Sustainability Costs, Capital Expenditures", "documentation": "Sustainability Costs, Capital Expenditures" } } }, "auth_ref": [] }, "bti_SustainabilityCostsRecognisedInProfitOrLoss": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SustainabilityCostsRecognisedInProfitOrLoss", "crdr": "debit", "calculation": { "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/SustainabilitycostsDisclosureofSustainabilityCostsDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Sustainability costs - expenses to the income statement", "label": "Sustainability Costs, Recognised in Profit or Loss", "documentation": "Sustainability Costs, Recognised in Profit or Loss" } } }, "auth_ref": [] }, "bti_SustainabilityCostsTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://www.bat.com/20241231", "localname": "SustainabilityCostsTextBlock", "presentation": [ "http://www.bat.com/role/Sustainabilitycosts" ], "lang": { "en-us": { "role": { "terseLabel": "Sustainability costs", "label": "Sustainability Costs [Text Block]", "documentation": "Sustainability Costs" } } }, "auth_ref": [] }, "bti_THPMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "THPMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "HP", "label": "T H P [Member]", "documentation": "THP." } } }, "auth_ref": [] }, "country_TR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "TR", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Turkey", "label": "T\u00dcRKIYE" } } }, "auth_ref": [] }, "currency_TRY": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "TRY", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Turkey, New Lira", "label": "Turkey, New Lira" } } }, "auth_ref": [] }, "stpr_TX": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "TX", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Texas", "label": "TEXAS" } } }, "auth_ref": [] }, "ecd_TabularListTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TabularListTableTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Tabular List [Table Text Block]", "terseLabel": "Tabular List, Table" } } }, "auth_ref": [ "r530" ] }, "bti_TargetAverageCentrallyManagedDebtMaturity": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TargetAverageCentrallyManagedDebtMaturity", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Target average centrally managed debt maturity", "label": "Target Average Centrally Managed Debt Maturity", "documentation": "Target average centrally managed debt maturity." } } }, "auth_ref": [] }, "bti_TargetCentrallyManagedDebtInterestRate": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TargetCentrallyManagedDebtInterestRate", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Target centrally managed debt maturing in a rolling 12-month period", "label": "Target Centrally Managed Debt Interest Rate", "documentation": "Target centrally managed debt interest rate." } } }, "auth_ref": [] }, "bti_TargetPercentageForFloatingToFixedRateDebt": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TargetPercentageForFloatingToFixedRateDebt", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Target for floating to fixed rate debt", "label": "Target Percentage For Floating To Fixed Rate Debt", "documentation": "Target percentage for floating to fixed rate debt." } } }, "auth_ref": [] }, "bti_TaxAdvisoryServicesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAdvisoryServicesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "tax advisory services", "label": "Tax Advisory Services [Member]", "documentation": "Tax Advisory Services" } } }, "auth_ref": [] }, "bti_TaxAmountOnLitigationSettlement": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAmountOnLitigationSettlement", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on litigation settlement", "label": "Tax Amount On Litigation Settlement", "documentation": "Tax amount on litigation settlement." } } }, "auth_ref": [] }, "bti_TaxAndNonControllingInterestsOnAmortisationAndImpairmentOfGoodwillTrademarksAndSimilarIntangiblesBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNonControllingInterestsOnAmortisationAndImpairmentOfGoodwillTrademarksAndSimilarIntangiblesBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax and non-controlling interests on amortisation and impairment of goodwill, trademarks and similar intangibles", "label": "Tax And Non Controlling Interests On Amortisation And Impairment Of Goodwill Trademarks And Similar Intangibles Basic", "documentation": "Tax and non-controlling interests on amortisation and impairment of goodwill, trademarks and similar intangibles basic." } } }, "auth_ref": [] }, "bti_TaxAndNonControllingInterestsOnAmortisationAndImpairmentOfGoodwillTrademarksAndSimilarIntangiblesPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNonControllingInterestsOnAmortisationAndImpairmentOfGoodwillTrademarksAndSimilarIntangiblesPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 20.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on amortisation and impairment of goodwill, trademarks and similar intangibles per share (in GBP per share)", "label": "Tax And Non Controlling Interests On Amortisation And Impairment Of Goodwill Trademarks And Similar Intangibles Per Share Basic", "documentation": "Tax And Non Controlling Interests On Amortisation And Impairment Of Goodwill Trademarks And Similar Intangibles Per Share Basic" } } }, "auth_ref": [] }, "bti_TaxAndNonControllingInterestsOnImpairmentChargesInRespectOfPropertyPlantAndEquipmentBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNonControllingInterestsOnImpairmentChargesInRespectOfPropertyPlantAndEquipmentBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 9.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on impairment charges in respect of property, plant and equipment", "label": "Tax And Non Controlling Interests On Impairment Charges In Respect Of Property, Plant And Equipment Basic", "documentation": "Tax And Non Controlling Interests On Impairment Charges In Respect Of Property, Plant And Equipment Basic" } } }, "auth_ref": [] }, "bti_TaxAndNonControllingInterestsOnImpairmentChargesInRespectOfPropertyPlantAndEquipmentPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNonControllingInterestsOnImpairmentChargesInRespectOfPropertyPlantAndEquipmentPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 15.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on impairment charges in respect of fixed assets, including the Group's head office in London (in GBP per share)", "label": "Tax And Non Controlling Interests On Impairment Charges In Respect Of Property, Plant And Equipment Per Share Basic", "documentation": "Tax And Non Controlling Interests On Impairment Charges In Respect Of Property, Plant And Equipment Per Share Basic" } } }, "auth_ref": [] }, "bti_TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 23.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Tax and non-controlling interests on restructuring and integration costs", "label": "Tax And Noncontrolling Interests On Restructuring And Integration Costs On Earnings Basic", "documentation": "Tax and noncontrolling interests on restructuring and integration costs on earnings basic." } } }, "auth_ref": [] }, "bti_TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 23.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax and non-controlling interests on restructuring and integration costs", "label": "Tax And Noncontrolling Interests On Restructuring And Integration Costs On Earnings Diluted", "documentation": "Tax and noncontrolling interests on restructuring and integration costs on earnings diluted." } } }, "auth_ref": [] }, "bti_TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 25.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on restructuring and integration costs (in GBP per share)", "label": "Tax And Noncontrolling Interests On Restructuring And Integration Costs On Earnings Per Share Basic", "documentation": "Tax and noncontrolling interests on restructuring and integration costs on earnings per share basic." } } }, "auth_ref": [] }, "bti_TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAndNoncontrollingInterestsOnRestructuringAndIntegrationCostsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on restructuring and integration costs (in GBP per share)", "label": "Tax And Noncontrolling Interests On Restructuring And Integration Costs On Earnings Per Share Diluted", "documentation": "Tax and noncontrolling interests on restructuring and integration costs on earnings per share diluted." } } }, "auth_ref": [] }, "bti_TaxAssessmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxAssessmentMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax assessment", "label": "Tax Assessment [Member]", "documentation": "Tax assessment." } } }, "auth_ref": [] }, "bti_TaxComplianceServicesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxComplianceServicesMember", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "tax compliance", "label": "Tax Compliance Services [Member]", "documentation": "Tax Compliance Services" } } }, "auth_ref": [] }, "bti_TaxCreditOtherThanIncomeTaxCredits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxCreditOtherThanIncomeTaxCredits", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtherOperatingIncomeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax credit other than income tax credits", "label": "Tax Credit Other Than Income Tax Credits", "documentation": "Tax Credit Other Than Income Tax Credits" } } }, "auth_ref": [] }, "bti_TaxEffectFromOtherTaxes": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectFromOtherTaxes", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other national tax charges", "label": "Tax Effect From Other Taxes", "documentation": "Tax effect from other taxes." } } }, "auth_ref": [] }, "bti_TaxEffectOfAdditionalNetDeferredTaxChargesCredits": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfAdditionalNetDeferredTaxChargesCredits", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additional net deferred tax (credits)/charges", "label": "Tax Effect Of Additional Net Deferred Tax Charges Credits", "documentation": "Tax effect of additional net deferred tax charges credits." } } }, "auth_ref": [] }, "bti_TaxEffectOfEarlyRepurchaseOfBondsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfEarlyRepurchaseOfBondsOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 26.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect of early repurchase of bonds", "label": "Tax Effect Of Early Repurchase Of Bonds On Earnings Basic", "documentation": "Tax effect of early repurchase of bonds on earnings basic." } } }, "auth_ref": [] }, "bti_TaxEffectOfEarlyRepurchaseOfBondsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfEarlyRepurchaseOfBondsOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 17.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect of early repurchase of bonds", "label": "Tax Effect Of Early Repurchase Of Bonds On Earnings Diluted", "documentation": "Tax effect of early repurchase of bonds on earnings diluted." } } }, "auth_ref": [] }, "bti_TaxEffectOfEarlyRepurchaseOfBondsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfEarlyRepurchaseOfBondsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 16.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect of early repurchase of bonds (in GBP per share)", "label": "Tax Effect Of Early Repurchase Of Bonds On Earnings Per Share Basic", "documentation": "Tax effect of early repurchase of bonds on earnings per share basic." } } }, "auth_ref": [] }, "bti_TaxEffectOfEarlyRepurchaseOfBondsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfEarlyRepurchaseOfBondsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 24.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect of early repurchase of bonds (in GBP per share)", "label": "Tax Effect Of Early Repurchase Of Bonds On Earnings Per Share Diluted", "documentation": "Tax effect of early repurchase of bonds on earnings per share diluted." } } }, "auth_ref": [] }, "ifrs-full_TaxEffectOfForeignTaxRates": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxEffectOfForeignTaxRates", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 11.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax at standard rates other than UK corporation tax rate", "label": "Tax effect of foreign tax rates" } }, "en": { "role": { "documentation": "The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit]" } } }, "auth_ref": [ "r65" ] }, "bti_TaxEffectOfInterestOnSettlementAndOtherOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfInterestOnSettlementAndOtherOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 21.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect of interest on FII GLO settlement and other", "label": "Tax Effect Of Interest On Settlement And Other On Earnings Basic", "documentation": "Tax effect of interest on settlement and other on earnings basic." } } }, "auth_ref": [] }, "bti_TaxEffectOfInterestOnSettlementAndOtherOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfInterestOnSettlementAndOtherOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect of interest on FII GLO settlement and\u00a0other", "label": "Tax Effect Of Interest On Settlement And Other On Earnings Diluted", "documentation": "Tax effect of interest on settlement and other on earnings diluted." } } }, "auth_ref": [] }, "bti_TaxEffectOfInterestOnSettlementAndOtherOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfInterestOnSettlementAndOtherOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 30.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect of interest on FII GLO settlement and other (in GBP per share)", "label": "Tax Effect Of Interest On Settlement And Other On Earnings Per Share Basic", "documentation": "Tax effect of interest on settlement and other on earnings per share basic." } } }, "auth_ref": [] }, "bti_TaxEffectOfInterestOnSettlementAndOtherOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfInterestOnSettlementAndOtherOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 29.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect of interest on FII GLO settlement and other (in GBP per share)", "label": "Tax Effect Of Interest On Settlement And Other On Earnings Per Share Diluted", "documentation": "Tax effect of interest on settlement and other on earnings per share diluted." } } }, "auth_ref": [] }, "bti_TaxEffectOfNoncontrollingInterestsShareOfAdjustingItems": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfNoncontrollingInterestsShareOfAdjustingItems", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Non-controlling interests' share of the adjusting items net of tax", "label": "Tax Effect Of Noncontrolling Interests Share Of Adjusting Items", "documentation": "Tax effect of non-controlling interests share of adjusting items." } } }, "auth_ref": [] }, "bti_TaxEffectOfOverseasWithholdingTaxes": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfOverseasWithholdingTaxes", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Overseas withholding taxes", "label": "Tax Effect Of Overseas Withholding Taxes", "documentation": "Tax effect of overseas withholding taxes." } } }, "auth_ref": [] }, "bti_TaxEffectOfPermanentDifferences": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOfPermanentDifferences", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Permanent differences", "label": "Tax Effect Of Permanent Differences", "documentation": "Tax effect of permanent differences." } } }, "auth_ref": [] }, "ifrs-full_TaxEffectOfTaxLosses": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxEffectOfTaxLosses", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unutilised/(utilised) tax losses", "label": "Tax effect of tax losses" } }, "en": { "role": { "documentation": "The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to tax losses. [Refer: Accounting profit]" } } }, "auth_ref": [ "r65" ] }, "bti_TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 14.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax on planned disposal of subsidiaries", "label": "Tax Effect On Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Basic", "documentation": "Tax Effect On Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Basic" } } }, "auth_ref": [] }, "bti_TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Tax on planned disposal of subsidiaries", "label": "Tax Effect on Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Diluted", "documentation": "Tax Effect on Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Diluted" } } }, "auth_ref": [] }, "bti_TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 10.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect of impairment of assets held-for-sale and associated costs (in GBP per share)", "label": "Tax Effect On Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Basic", "documentation": "Tax Effect On Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Basic" } } }, "auth_ref": [] }, "bti_TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnImpairmentOfAssetsHeldForSaleAndAssociatedCostsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on effect of disposal of subsidiaries Tax effect of impairment of assets held-for-sale and associated costs (in GBP per share)", "label": "Tax Effect on Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Diluted", "documentation": "Tax Effect on Impairment Of Assets Held-For-Sale And Associated Costs On Earnings Per Share Diluted" } } }, "auth_ref": [] }, "bti_TaxEffectOnOtherAdjustingItemsOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnOtherAdjustingItemsOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect on other adjusting items", "label": "Tax Effect On Other Adjusting Items On Earnings Basic", "documentation": "Tax effect on other adjusting items on earnings basic." } } }, "auth_ref": [] }, "bti_TaxEffectOnOtherAdjustingItemsOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnOtherAdjustingItemsOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 22.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax effect on other adjusting items", "label": "Tax Effect On Other Adjusting Items On Earnings Diluted", "documentation": "Tax effect on other adjusting items on earnings diluted." } } }, "auth_ref": [] }, "bti_TaxEffectOnOtherAdjustingItemsOnEarningsPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnOtherAdjustingItemsOnEarningsPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect on other adjusting items (in GBP per share)", "label": "Tax Effect On Other Adjusting Items On Earnings Per Share Basic", "documentation": "Tax effect on other adjusting items on earnings per share basic." } } }, "auth_ref": [] }, "bti_TaxEffectOnOtherAdjustingItemsOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxEffectOnOtherAdjustingItemsOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 30.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax effect on other adjusting items (in GBP per share)", "label": "Tax Effect On Other Adjusting Items On Earnings Per Share Diluted", "documentation": "Tax effect on other adjusting items on earnings per share diluted." } } }, "auth_ref": [] }, "ifrs-full_TaxExpenseIncomeAtApplicableTaxRate": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxExpenseIncomeAtApplicableTaxRate", "crdr": "debit", "calculation": { "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails": { "parentTag": "ifrs-full_IncomeTaxExpenseContinuingOperations", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax at 25% (2023: 23.5%; 2022: 19%) on the above", "label": "Tax expense (income) at applicable tax rate" } }, "en": { "role": { "documentation": "The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate]" } } }, "auth_ref": [ "r65" ] }, "ifrs-full_TaxExpenseOtherThanIncomeTaxExpense": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxExpenseOtherThanIncomeTaxExpense", "crdr": "debit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "http://www.bat.com/role/OtheroperatingexpensesSummaryofOtherOperatingExpensesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Romania and Brazil other taxes", "verboseLabel": "Tax expense other than income tax expense", "label": "Tax expense other than income tax expense" } }, "en": { "role": { "documentation": "The amount of tax expense exclusive of income tax expense." } } }, "auth_ref": [ "r585" ] }, "bti_TaxLossesUtilisationPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxLossesUtilisationPeriod", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Utilisation period", "label": "Tax Losses Utilisation Period", "documentation": "Tax Losses Utilisation Period" } } }, "auth_ref": [] }, "bti_TaxOnAdjustingItems": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnAdjustingItems", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on adjusting items", "label": "Tax On Adjusting Items", "documentation": "Tax on adjusting items." } } }, "auth_ref": [] }, "bti_TaxOnAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 24.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax and non-controlling interests on amortisation and impairment of goodwill, trademarks and similar intangibles", "label": "Tax On Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Diluted", "documentation": "Tax on amortisation and impairment of trademarks and similar intangibles on earnings diluted." } } }, "auth_ref": [] }, "bti_TaxOnAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnAmortisationAndImpairmentOfTrademarksAndSimilarIntangiblesOnEarningsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 26.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on amortisation and impairment of goodwill, trademarks and similar intangibles per share (in GBP per share)", "label": "Tax On Amortisation And Impairment Of Trademarks And Similar Intangibles On Earnings Per Share Diluted", "documentation": "Tax on amortisation and impairment of trademarks and similar intangibles on earnings per share diluted." } } }, "auth_ref": [] }, "bti_TaxOnBrazilAndRomaniaOtherTaxesDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnBrazilAndRomaniaOtherTaxesDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax on Romania and Brazil other taxes", "label": "Tax On Brazil And Romania Other Taxes Diluted", "documentation": "Tax on Excise and VAT disputes diluted." } } }, "auth_ref": [] }, "bti_TaxOnBrazilAndRomaniaOtherTaxesOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnBrazilAndRomaniaOtherTaxesOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 30.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Tax on Romania and Brazil other taxes", "label": "Tax On Brazil And Romania Other Taxes On Earnings Basic", "documentation": "Tax on excise and VAT disputes basic." } } }, "auth_ref": [] }, "bti_TaxOnBrazilAndRomaniaOtherTaxesPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnBrazilAndRomaniaOtherTaxesPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 27.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on excise and VAT disputes (in GBP per share)", "label": "Tax On Brazil And Romania Other Taxes Per Share Basic", "documentation": "Tax on excise and VAT disputes per share basic." } } }, "auth_ref": [] }, "bti_TaxOnBrazilAndRomaniaOtherTaxesPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnBrazilAndRomaniaOtherTaxesPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 16.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on Romania and Brazil other taxes (in GBP per share)", "label": "Tax On Brazil And Romania Other Taxes Per Share Diluted", "documentation": "Tax on excise and VAT disputes per share diluted." } } }, "auth_ref": [] }, "bti_TaxOnCouponOnPerpetualHybridBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnCouponOnPerpetualHybridBonds", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails": { "parentTag": "bti_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntityUsedInCalculatingEarningsPerShare", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationofEarningsUsedToCalculateEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on coupon on perpetual hybrid bonds", "label": "Tax On Coupon On Perpetual Hybrid Bonds", "documentation": "Tax on coupon on perpetual hybrid bonds." } } }, "auth_ref": [] }, "bti_TaxOnImpairmentChargesInRespectOfFixedAssetsOnEarningDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnImpairmentChargesInRespectOfFixedAssetsOnEarningDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 6.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax and non-controlling interests on impairment charges in respect of property, plant and equipment", "label": "Tax On Impairment Charges In Respect Of Fixed Assets On Earning Diluted", "documentation": "Tax On Impairment Charges In Respect Of Fixed Assets On Earning Diluted" } } }, "auth_ref": [] }, "bti_TaxOnImpairmentChargesInRespectOfFixedAssetsPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnImpairmentChargesInRespectOfFixedAssetsPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 13.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on impairment charges in respect of fixed assets, including the Group's head office in London (in GBP per share)", "label": "Tax On Impairment Charges In Respect Of Fixed Assets Per Share Diluted", "documentation": "Tax On Impairment Charges In Respect Of Fixed Assets Per Share Diluted" } } }, "auth_ref": [] }, "bti_TaxOnSettlementOfHistoricalLitigationOnEarningBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnSettlementOfHistoricalLitigationOnEarningBasic", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": 1.0, "order": 13.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on settlement of historical litigation in\u00a0relation to the Fox River", "label": "Tax On Settlement Of Historical Litigation On Earning Basic", "documentation": "Tax On Settlement Of Historical Litigation On Earning Basic" } } }, "auth_ref": [] }, "bti_TaxOnSettlementOfHistoricalLitigationOnEarningDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnSettlementOfHistoricalLitigationOnEarningDiluted", "crdr": "credit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": 1.0, "order": 5.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on settlement of historical litigation in\u00a0relation to the Fox River", "label": "Tax On Settlement Of Historical Litigation On Earning Diluted", "documentation": "Tax On Settlement Of Historical Litigation On Earning Diluted" } } }, "auth_ref": [] }, "bti_TaxOnSettlementOfHistoricalLitigationPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnSettlementOfHistoricalLitigationPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 23.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on settlement of historical litigation in\u00a0relation to the Fox River (in GBP per share)", "label": "Tax On Settlement Of Historical Litigation Per Share Basic", "documentation": "Tax On Settlement Of Historical Litigation Per Share Basic" } } }, "auth_ref": [] }, "bti_TaxOnSettlementOfHistoricalLitigationPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnSettlementOfHistoricalLitigationPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 12.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on settlement of historical litigation in relation to the Fox River (in GPB per share)", "label": "Tax On Settlement Of Historical Litigation Per Share Diluted", "documentation": "Tax On Settlement Of Historical Litigation Per Share Diluted" } } }, "auth_ref": [] }, "bti_TaxOnTheOngoingLitigationInCanadaOnEarningsBasic": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnTheOngoingLitigationInCanadaOnEarningsBasic", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsBasic", "weight": -1.0, "order": 16.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Tax on the ongoing litigation in Canada", "label": "Tax On The Ongoing Litigation in Canada On Earnings Basic", "documentation": "Tax On The Ongoing Litigation in Canada On Earnings Basic" } } }, "auth_ref": [] }, "bti_TaxOnTheOngoingLitigationInCanadaOnEarningsDiluted": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnTheOngoingLitigationInCanadaOnEarningsDiluted", "crdr": "debit", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedEarningsDiluted", "weight": -1.0, "order": 19.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "negatedTerseLabel": "Tax on the ongoing litigation in Canada", "label": "Tax On The Ongoing Litigation in Canada On Earnings Diluted", "documentation": "Tax On The Ongoing Litigation in Canada On Earnings Diluted" } } }, "auth_ref": [] }, "bti_TaxOnTheOngoingLitigationInCanadaPerShareBasic": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnTheOngoingLitigationInCanadaPerShareBasic", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedBasicEarningsPerShare", "weight": 1.0, "order": 13.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on the ongoing litigation in Canada (in GBP per share)", "label": "Tax On The Ongoing Litigation In Canada Per Share Basic", "documentation": "Tax On The Ongoing Litigation In Canada Per Share Basic" } } }, "auth_ref": [] }, "bti_TaxOnTheOngoingLitigationInCanadaPerShareDiluted": { "xbrltype": "perShareItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxOnTheOngoingLitigationInCanadaPerShareDiluted", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails": { "parentTag": "bti_AdjustedDilutedEarningsPerShare", "weight": 1.0, "order": 8.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofAdjustedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax on the ongoing litigation in Canada (in GBP per share)", "label": "Tax On The Ongoing Litigation in Canada Per Share Diluted", "documentation": "Tax On The Ongoing Litigation in Canada Per Share Diluted" } } }, "auth_ref": [] }, "bti_TaxRateEffectDueToPermanentDifferences": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectDueToPermanentDifferences", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Permanent differences, percentage", "label": "Tax Rate Effect Due To Permanent Differences", "documentation": "Tax rate effect due to permanent differences." } } }, "auth_ref": [] }, "ifrs-full_TaxRateEffectFromChangeInTaxRate": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxRateEffectFromChangeInTaxRate", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Deferred tax relating to changes in tax rates, percentage", "label": "Tax rate effect from change in tax rate" } }, "en": { "role": { "documentation": "The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate]" } } }, "auth_ref": [ "r66" ] }, "bti_TaxRateEffectFromOtherTaxes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectFromOtherTaxes", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Other national tax charges, percentage", "label": "Tax Rate Effect From Other Taxes", "documentation": "Tax rate effect from other taxes." } } }, "auth_ref": [] }, "bti_TaxRateEffectFromPillarTwoIncomeTaxes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectFromPillarTwoIncomeTaxes", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Pillar Two income taxes, percentage", "label": "Tax Rate Effect From Pillar Two Income Taxes", "documentation": "Tax Rate Effect From Pillar Two Income Taxes" } } }, "auth_ref": [] }, "bti_TaxRateEffectOfAdditionalNetDeferredTaxCharges": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectOfAdditionalNetDeferredTaxCharges", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Additional net deferred tax (credits)/charges, percentage", "label": "Tax Rate Effect Of Additional Net Deferred Tax Charges", "documentation": "Tax rate effect of additional net deferred tax charges." } } }, "auth_ref": [] }, "ifrs-full_TaxRateEffectOfAdjustmentsForCurrentTaxOfPriorPeriods": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxRateEffectOfAdjustmentsForCurrentTaxOfPriorPeriods", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Adjustments in respect of prior periods, percentage", "label": "Tax rate effect of adjustments for current tax of prior periods" } }, "en": { "role": { "documentation": "Tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from adjustments for the current tax of prior periods. [Refer: Average effective tax rate; Applicable tax rate; Adjustments for current tax of prior periods]" } } }, "auth_ref": [ "r587" ] }, "bti_TaxRateEffectOfDoubleTaxationReliefOnUKProfits": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectOfDoubleTaxationReliefOnUKProfits", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Double taxation relief on UK profits, percentage", "label": "Tax Rate Effect Of Double Taxation Relief On U K Profits", "documentation": "Tax rate effect of double taxation relief on UK profits." } } }, "auth_ref": [] }, "ifrs-full_TaxRateEffectOfForeignTaxRates": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxRateEffectOfForeignTaxRates", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax at standard rates other than UK corporation tax rate, percentage", "label": "Tax rate effect of foreign tax rates" } }, "en": { "role": { "documentation": "The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the application of foreign tax rates. [Refer: Average effective tax rate; Applicable tax rate]" } } }, "auth_ref": [ "r66" ] }, "bti_TaxRateEffectOfOverseasWithholdingTaxes": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateEffectOfOverseasWithholdingTaxes", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Overseas withholding taxes, percentage", "label": "Tax Rate Effect Of Overseas Withholding Taxes", "documentation": "Tax rate effect of overseas withholding taxes." } } }, "auth_ref": [] }, "ifrs-full_TaxRateEffectOfTaxLosses": { "xbrltype": "percentItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TaxRateEffectOfTaxLosses", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesSummaryofFactorsAffectingtheTaxationChargeDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unutilised/(utilised) tax losses, percentage", "label": "Tax rate effect of tax losses" } }, "en": { "role": { "documentation": "The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from tax losses. [Refer: Average effective tax rate; Applicable tax rate]" } } }, "auth_ref": [ "r66" ] }, "bti_TaxRateOnLitigationSettlement": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxRateOnLitigationSettlement", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax rate on litigation settlement", "label": "Tax Rate On Litigation Settlement", "documentation": "Tax rate on litigation settlement." } } }, "auth_ref": [] }, "bti_TaxReassessmentFineMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxReassessmentFineMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax reassessment, fine", "label": "Tax Reassessment, Fine [Member]", "documentation": "Tax Reassessment, Fine" } } }, "auth_ref": [] }, "bti_TaxReassessmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxReassessmentMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax reassessment", "label": "Tax Reassessment [Member]", "documentation": "Member stands for tax reassessment." } } }, "auth_ref": [] }, "bti_TaxReassessmentReducedFineMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxReassessmentReducedFineMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax reassessment, reduced fine", "label": "Tax Reassessment, Reduced Fine [Member]", "documentation": "Tax Reassessment, Reduced Fine" } } }, "auth_ref": [] }, "bti_TaxReliefOnIssuanceCostAndCouponIncurred": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TaxReliefOnIssuanceCostAndCouponIncurred", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TaxationonOrdinaryActivitiesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax relief on issuance cost and coupon incurred", "label": "Tax Relief On Issuance Cost And Coupon Incurred", "documentation": "Tax relief on issuance cost and coupon incurred." } } }, "auth_ref": [] }, "ifrs-full_TemporaryDifferenceMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TemporaryDifferenceMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Temporary differences [member]", "label": "Temporary differences [member]" } }, "en": { "role": { "documentation": "This member stands for differences between the carrying amount of an asset or liability in the statement of financial position and its tax base. Temporary differences may be either: (a) taxable temporary differences; or (b) deductible temporary differences. [Refer: Carrying amount [member]]" } } }, "auth_ref": [ "r71" ] }, "ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Temporary difference, unused tax losses and unused tax credits [axis]", "label": "Temporary difference, unused tax losses and unused tax credits [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r71" ] }, "ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Temporary difference, unused tax losses and unused tax credits", "label": "Temporary difference, unused tax losses and unused tax credits [domain]" } }, "en": { "role": { "documentation": "This member stands for temporary differences, unused tax losses and unused tax credits. It also represents the standard value for the 'Temporary difference, unused tax losses and unused tax credits' axis if no other member is used. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]" } } }, "auth_ref": [ "r71" ] }, "ifrs-full_TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TemporaryDifferencesAssociatedWithInvestmentsInSubsidiariesBranchesAndAssociatesAndInterestsInJointVentures", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Undistributed earnings of subsidiaries for which deferred tax liabilities have not been recognised", "label": "Temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements for which deferred tax liabilities have not been recognised" } }, "en": { "role": { "documentation": "The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Total for all associates [member]; Total for all subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries reported in separate financial statements]" } } }, "auth_ref": [ "r68" ] }, "bti_TemporaryLiquidityFacilityMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TemporaryLiquidityFacilityMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Temporary liquidity facility", "label": "Temporary Liquidity Facility [Member]", "documentation": "Temporary Liquidity Facility" } } }, "auth_ref": [] }, "bti_TenderOffer": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TenderOffer", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tender offer", "label": "Tender Offer", "documentation": "Tender offer." } } }, "auth_ref": [] }, "bti_TenderOfferAccruedInterest": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TenderOfferAccruedInterest", "crdr": "credit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tender offer accrued interest", "label": "Tender Offer Accrued Interest", "documentation": "Tender offer accrued interest." } } }, "auth_ref": [] }, "bti_TermOutPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TermOutPeriod", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Term out period", "label": "Term Out Period", "documentation": "Term Out Period" } } }, "auth_ref": [] }, "bti_TexasAndMinnesotaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TexasAndMinnesotaMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Texas and Minnesota", "label": "Texas And Minnesota [Member]", "documentation": "Texas and Minnesota." } } }, "auth_ref": [] }, "bti_TexasMinnesotaAndMississippiMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TexasMinnesotaAndMississippiMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Texas, Minnesota and Mississippi", "label": "Texas Minnesota And Mississippi [Member]", "documentation": "Texas, Minnesota and Mississippi." } } }, "auth_ref": [] }, "bti_TexasTobaccoSettlementAgreementMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TexasTobaccoSettlementAgreementMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Texas Tobacco settlement agreement", "label": "Texas Tobacco Settlement Agreement [Member]", "documentation": "Texas Tobacco Settlement Agreement" } } }, "auth_ref": [] }, "bti_ThirdPartySettlementAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThirdPartySettlementAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Cost order amount", "label": "Third Party Settlement Amount", "documentation": "Third party settlement amount" } } }, "auth_ref": [] }, "bti_ThreeHundredSixtyFourDayTranchesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreeHundredSixtyFourDayTranchesMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "364-day Tranche", "label": "Three Hundred Sixty Four Day Tranches [Member]", "documentation": "365 day tranches." } } }, "auth_ref": [] }, "bti_ThreePercentPerpetualHybridBondMemberMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePercentPerpetualHybridBondMemberMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "3% Perpetual hybrid bond", "label": "Three Percent Perpetual Hybrid Bond Member [Member]", "documentation": "Three percent perpetual hybrid bond member." } } }, "auth_ref": [] }, "bti_ThreePointFiveFiveSevenPercentageNotesDueTwoThousandAndTwentySevenMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointFiveFiveSevenPercentageNotesDueTwoThousandAndTwentySevenMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.557% Notes due 2027", "label": "Three Point Five Five Seven Percentage Notes Due Two Thousand And Twenty Seven [Member]", "documentation": "Three point five five seven percentage notes due two thousand and twenty seven." } } }, "auth_ref": [] }, "bti_ThreePointFourSixTwoPercentageNotesDueTwoThousandAndTwentyNineMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointFourSixTwoPercentageNotesDueTwoThousandAndTwentyNineMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.462% Notes due 2029", "label": "Three Point Four Six Two Percentage Notes Due Two Thousand And Twenty Nine [Member]", "documentation": "Three point four six two percentage notes due two thousand and twenty nine." } } }, "auth_ref": [] }, "bti_ThreePointNineEightFourPercentageNotesDueTwoThousandAndFiftyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointNineEightFourPercentageNotesDueTwoThousandAndFiftyMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.984% Notes due 2050", "label": "Three Point Nine Eight Four Percentage Notes Due Two Thousand And Fifty [Member]", "documentation": "Three point nine eight four percentage notes due two thousand and fifty." } } }, "auth_ref": [] }, "bti_ThreePointSevenFivePercentPerpetualHybridBondMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointSevenFivePercentPerpetualHybridBondMember", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "3.75% Perpetual hybrid bond", "label": "Three Point Seven Five Percent Perpetual Hybrid Bond [Member]", "documentation": "Three point seven five percent perpetual hybrid bond." } } }, "auth_ref": [] }, "bti_ThreePointSevenThreeFourPercentageNotesDueTwoThousandAndFortyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointSevenThreeFourPercentageNotesDueTwoThousandAndFortyMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.734% Notes due 2040", "label": "Three Point Seven Three Four Percentage Notes Due Two Thousand And Forty [Member]", "documentation": "Three point seven three four percentage notes due two thousand and forty." } } }, "auth_ref": [] }, "bti_ThreePointTwoOneFivePercentageNotesDueTwoThousandAndTwentySixMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointTwoOneFivePercentageNotesDueTwoThousandAndTwentySixMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.215% Notes due 2026", "label": "Three Point Two One Five Percentage Notes Due Two Thousand And Twenty Six [Member]", "documentation": "Three point two one five percentage notes due two thousand and twenty six." } } }, "auth_ref": [] }, "bti_ThreePointTwoTwoTwoPercentageNotesDueTwoThousandAndTwentyFourMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ThreePointTwoTwoTwoPercentageNotesDueTwoThousandAndTwentyFourMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "3.222% Notes due 2024", "label": "Three Point Two Two Two Percentage Notes Due Two Thousand And Twenty Four [Member]", "documentation": "Three point two two two percentage notes due two thousand and twenty four." } } }, "auth_ref": [] }, "ifrs-full_ThreeYearsBeforeReportingYearMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ThreeYearsBeforeReportingYearMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsEngleClassActionandEngleProgenyCasesFloridaDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Judgements arising three years before reporting year", "label": "Three years before reporting year [member]" } }, "en": { "role": { "documentation": "This member stands for a year that ended three years before the end of the reporting year." } } }, "auth_ref": [ "r258" ] }, "srt_TitleOfIndividualAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "TitleOfIndividualAxis", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Title and Position [Axis]", "label": "Title and Position [Axis]", "documentation": "Information by title and position of individual or group within organization." } } }, "auth_ref": [] }, "srt_TitleOfIndividualWithRelationshipToEntityDomain": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/srt/2024", "localname": "TitleOfIndividualWithRelationshipToEntityDomain", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Title and Position [Domain]", "label": "Title and Position [Domain]", "documentation": "Title and position of individual or group within organization." } } }, "auth_ref": [] }, "bti_TitleOfIndividualsAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TitleOfIndividualsAxis", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Title Of Individuals [Axis]", "label": "Title Of Individuals [Axis]", "documentation": "Title of Iidividuals." } } }, "auth_ref": [] }, "bti_TitleOfIndividualsDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TitleOfIndividualsDomain", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Title Of Individuals [Domain]", "label": "Title Of Individuals [Domain]", "documentation": "Title Of Individuals [Domain]" } } }, "auth_ref": [] }, "bti_TobaccoDamagesAndHealthCareCostsRecoveryAct2000Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TobaccoDamagesAndHealthCareCostsRecoveryAct2000Member", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tobacco Damages and Health Care Costs Recovery Act 2000", "label": "Tobacco Damages And Health Care Costs Recovery Act 2000 [Member]", "documentation": "Tobacco Damages And Health Care Costs Recovery Act 2000" } } }, "auth_ref": [] }, "bti_TobaccoDamagesAndHealthCareCostsRecoveryAct2009Member": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TobaccoDamagesAndHealthCareCostsRecoveryAct2009Member", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tobacco Damages And Health Care Costs Recovery Act 2009", "label": "Tobacco Damages And Health Care Costs Recovery Act 2009 [Member]", "documentation": "Tobacco Damages And Health Care Costs Recovery Act 2009" } } }, "auth_ref": [] }, "bti_TobaccoProductLiabilityClaimsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TobaccoProductLiabilityClaimsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tobacco product liability claims", "label": "Tobacco Product Liability Claims [Member]", "documentation": "Tobacco Product Liability Claims [member]" } } }, "auth_ref": [] }, "ifrs-full_TopOfRangeMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TopOfRangeMember", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails", "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Top of range", "label": "Top of range [member]" } }, "en": { "role": { "documentation": "This member stands for top of a range." } } }, "auth_ref": [ "r197", "r235", "r252", "r268", "r431", "r433", "r627" ] }, "bti_TotalDirectorsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TotalDirectorsMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total Directors", "label": "Total Directors [Member]", "documentation": "Total directors." } } }, "auth_ref": [] }, "bti_TotalNumberOfPutativeClassActionsFiled": { "xbrltype": "integerItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TotalNumberOfPutativeClassActionsFiled", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Number of putative class actions filed", "label": "Total Number Of Putative Class Actions Filed", "documentation": "Total number of putative class actions filed." } } }, "auth_ref": [] }, "bti_TotalShareholderReturnMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TotalShareholderReturnMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Total Shareholder Return", "label": "Total Shareholder Return [Member]", "documentation": "Total Shareholder Return" } } }, "auth_ref": [] }, "ecd_TotalShareholderRtnAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TotalShareholderRtnAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Total Shareholder Return Amount", "terseLabel": "Total Shareholder Return Amount" } } }, "auth_ref": [ "r522" ] }, "ecd_TotalShareholderRtnVsPeerGroupTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TotalShareholderRtnVsPeerGroupTextBlock", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Total Shareholder Return Vs Peer Group [Text Block]", "terseLabel": "Total Shareholder Return Vs Peer Group" } } }, "auth_ref": [ "r529" ] }, "ifrs-full_TradeAndOtherCurrentPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherCurrentPayables", "crdr": "credit", "calculation": { "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentLiabilities", "weight": 1.0, "order": 2.0 } }, "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails", "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/OtheroperatingexpensesChargesinrespectofDOJandOFACinvestigationsAdditionalInformationDetails", "http://www.bat.com/role/ProvisionsforliabilitiesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other payables", "verboseLabel": "Current", "label": "Trade and other current payables" } }, "en": { "role": { "documentation": "The amount of current trade payables and current other payables. [Refer: Current trade payables; Other current payables]" } } }, "auth_ref": [ "r17" ] }, "ifrs-full_TradeAndOtherCurrentReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherCurrentReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails": { "parentTag": "ifrs-full_TradeAndOtherReceivables", "weight": 1.0, "order": 1.0 }, "http://www.bat.com/role/GroupBalanceSheet": { "parentTag": "ifrs-full_CurrentAssetsOtherThanAssetsOrDisposalGroupsClassifiedAsHeldForSaleOrAsHeldForDistributionToOwners", "weight": 1.0, "order": 3.0 } }, "presentation": [ "http://www.bat.com/role/GroupBalanceSheet", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other receivables", "verboseLabel": "Trade and other receivables, current", "label": "Trade and other current receivables" } }, "en": { "role": { "documentation": "The amount of current trade receivables and current other receivables. [Refer: Current trade receivables; Other current receivables]" } } }, "auth_ref": [ "r14", "r31" ] }, "ifrs-full_TradeAndOtherPayables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherPayables", "crdr": "credit", "presentation": [ "http://www.bat.com/role/InterestsinsubsidiariesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Trade and other payables", "terseLabel": "Trade and other payables", "label": "Trade and other payables" } }, "en": { "role": { "documentation": "The amount of trade payables and other payables. [Refer: Trade payables; Other payables]" } } }, "auth_ref": [ "r17" ] }, "ifrs-full_TradeAndOtherPayablesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherPayablesAbstract", "lang": { "en-us": { "role": { "label": "Trade and other payables [abstract]" } } }, "auth_ref": [] }, "bti_TradeAndOtherPayablesLineItems": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeAndOtherPayablesLineItems", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails", "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade And Other Payables [Line Items]", "label": "Trade And Other Payables [Line Items]", "documentation": "Trade and other payables." } } }, "auth_ref": [] }, "bti_TradeAndOtherPayablesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeAndOtherPayablesMember", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesRomaniaandBrazilothertaxesDetails", "http://www.bat.com/role/ProvisionsforliabilitiesSummaryofProvisionsExcludingPostRetirementBenefitsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade and other payables", "label": "Trade And Other Payables [Member]", "documentation": "Trade and other payables." } } }, "auth_ref": [] }, "bti_TradeAndOtherPayablesTable": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeAndOtherPayablesTable", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails", "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade And Other Payables [Table]", "label": "Trade And Other Payables [Table]", "documentation": "Trade and other payables." } } }, "auth_ref": [] }, "ifrs-full_TradeAndOtherPayablesToRelatedParties": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherPayablesToRelatedParties", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts due to non-issuer/non-guarantor subsidiaries", "label": "Payables to related parties" } }, "en": { "role": { "documentation": "The amount of payables due to related parties. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r583" ] }, "ifrs-full_TradeAndOtherPayablesToTradeSuppliers": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherPayablesToTradeSuppliers", "crdr": "credit", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesSummaryofTradeandOtherPayablesDetails", "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade payables", "label": "Trade payables" } }, "en": { "role": { "documentation": "The amount of payment due to suppliers for goods and services used in the entity's business." } } }, "auth_ref": [ "r583" ] }, "ifrs-full_TradeAndOtherReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails": { "parentTag": null, "weight": null, "order": null, "root": true }, "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails_1": { "parentTag": null, "weight": null, "order": null, "root": true } }, "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "totalLabel": "Total trade and other receivables", "terseLabel": "Net trade and other receivables per balance sheet", "label": "Trade and other receivables" } }, "en": { "role": { "documentation": "The amount of trade receivables and other receivables. [Refer: Trade receivables; Other receivables]" } } }, "auth_ref": [ "r14", "r31" ] }, "ifrs-full_TradeAndOtherReceivablesAbstract": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherReceivablesAbstract", "lang": { "en-us": { "role": { "label": "Trade and other receivables [abstract]" } } }, "auth_ref": [] }, "ifrs-full_TradeAndOtherReceivablesDueFromRelatedParties": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeAndOtherReceivablesDueFromRelatedParties", "crdr": "debit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Amounts due from non-issuer/non-guarantor subsidiaries", "label": "Receivables due from related parties" } }, "en": { "role": { "documentation": "The amount of receivables due from related parties. [Refer: Total for all related parties [member]]" } } }, "auth_ref": [ "r382" ] }, "bti_TradeDebtorsBalancesAvailableForFactoring": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeDebtorsBalancesAvailableForFactoring", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade debtor balance", "label": "Trade Debtors Balances Available For Factoring", "documentation": "Trade debtors balances available for factoring." } } }, "auth_ref": [] }, "bti_TradeMarkMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeMarkMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trademarks", "label": "Trade Mark [Member]", "documentation": "Trade Mark" } } }, "auth_ref": [] }, "bti_TradeReceivableDerecognized": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TradeReceivableDerecognized", "crdr": "debit", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade receivables derecognized", "label": "Trade Receivable Derecognized", "documentation": "Trade receivable derecognized." } } }, "auth_ref": [] }, "ifrs-full_TradeReceivables": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeReceivables", "crdr": "debit", "calculation": { "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails_1": { "parentTag": "ifrs-full_TradeAndOtherReceivables", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade receivables", "label": "Trade receivables" } }, "en": { "role": { "documentation": "The amount due from customers for goods and services sold." } } }, "auth_ref": [ "r382" ] }, "ifrs-full_TradeReceivablesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TradeReceivablesMember", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesSummaryofmovementsinallowanceaccountsDetails", "http://www.bat.com/role/TradeandotherreceivablesSummaryoftradeandotherreceivablesreportedinbalancesheetnetofallowancesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trade receivables", "label": "Trade receivables [member]" } }, "en": { "role": { "documentation": "This member stands for trade receivables. [Refer: Trade receivables]" } } }, "auth_ref": [ "r309", "r314", "r447", "r578" ] }, "ecd_TradingArrAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TradingArrAxis", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement [Axis]", "terseLabel": "Trading Arrangement:" } } }, "auth_ref": [ "r550" ] }, "ecd_TradingArrByIndTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TradingArrByIndTable", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangements, by Individual [Table]", "terseLabel": "Trading Arrangements, by Individual" } } }, "auth_ref": [ "r552" ] }, "dei_TradingSymbol": { "xbrltype": "tradingSymbolItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "TradingSymbol", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "Trading Symbol", "label": "Trading Symbol", "documentation": "Trading symbol of an instrument as listed on an exchange." } } }, "auth_ref": [] }, "bti_TraditionalOralMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TraditionalOralMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Traditional Oral", "label": "Traditional Oral [Member]", "documentation": "Traditional oral." } } }, "auth_ref": [] }, "bti_TranchePeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TranchePeriod", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Period of tranche", "label": "Tranche Period", "documentation": "Tranche period." } } }, "auth_ref": [] }, "bti_TransactionCostsOnRepurchaseOfBonds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TransactionCostsOnRepurchaseOfBonds", "crdr": "debit", "presentation": [ "http://www.bat.com/role/NetfinancecostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Transaction costs on repurchase of bonds", "label": "Transaction Costs on Repurchase of Bonds", "documentation": "Transaction Costs on Repurchase of Bonds" } } }, "auth_ref": [] }, "ifrs-full_TransactionsRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombinationAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TransactionsRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombinationAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [axis]", "label": "Transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r278" ] }, "ifrs-full_TransactionsRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombinationDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TransactionsRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombinationDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Transactions recognised separately from acquisition of assets and assumption of liabilities in business combination", "label": "Transactions recognised separately from acquisition of assets and assumption of liabilities in business combination [domain]" } }, "en": { "role": { "documentation": "This member stands for transactions that are recognised separately from the acquisition of assets and assumption of liabilities in business combinations. It also represents the standard value for the 'Transactions recognised separately from acquisition of assets and assumption of liabilities in business combination' axis if no other member is used. [Refer: Total for all business combinations [member]]" } } }, "auth_ref": [ "r278" ] }, "bti_TransactionsWithNonIssuerNonGuarantorSubsidiariesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TransactionsWithNonIssuerNonGuarantorSubsidiariesMember", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofBalanceSheetDetails", "http://www.bat.com/role/SummarisedfinancialinformationSummarisedFinancialInformationofIncomeStatementDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Transactions with non-issuer/non-guarantor subsidiaries", "label": "Transactions With Non Issuer Non Guarantor Subsidiaries [Member]", "documentation": "Transactions with non-issuer/non-guarantor subsidiaries." } } }, "auth_ref": [] }, "bti_TranslationExchangeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TranslationExchangeMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Translation exchange", "label": "Translation Exchange [Member]", "documentation": "Translation exchange." } } }, "auth_ref": [] }, "ecd_TrdArrAdoptionDate": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrAdoptionDate", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement Adoption Date", "terseLabel": "Adoption Date" } } }, "auth_ref": [ "r553" ] }, "ecd_TrdArrDuration": { "xbrltype": "durationItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrDuration", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement Duration", "terseLabel": "Arrangement Duration" } } }, "auth_ref": [ "r554" ] }, "ecd_TrdArrExpirationDate": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrExpirationDate", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement Expiration Date", "terseLabel": "Expiration Date" } } }, "auth_ref": [ "r554" ] }, "ecd_TrdArrIndName": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrIndName", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement, Individual Name", "terseLabel": "Name" } } }, "auth_ref": [ "r552" ] }, "ecd_TrdArrIndTitle": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrIndTitle", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement, Individual Title", "terseLabel": "Title" } } }, "auth_ref": [ "r552" ] }, "ecd_TrdArrSecuritiesAggAvailAmt": { "xbrltype": "sharesItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrSecuritiesAggAvailAmt", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement, Securities Aggregate Available Amount", "terseLabel": "Aggregate Available" } } }, "auth_ref": [ "r555" ] }, "ecd_TrdArrTerminationDate": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "TrdArrTerminationDate", "presentation": [ "http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" ], "lang": { "en-us": { "role": { "label": "Trading Arrangement Termination Date", "terseLabel": "Termination Date" } } }, "auth_ref": [ "r553" ] }, "bti_TreasurySharesHeldInTrust": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TreasurySharesHeldInTrust", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Treasury shares held in trust", "label": "Treasury Shares Held In Trust", "documentation": "Treasury shares held in trust." } } }, "auth_ref": [] }, "bti_TreasurySharesRepurchasedAndNotCancelled": { "xbrltype": "sharesItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TreasurySharesRepurchasedAndNotCancelled", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Treasury shares repurchased", "label": "Treasury Shares Repurchased And Not Cancelled", "documentation": "Treasury shares repurchased." } } }, "auth_ref": [] }, "bti_TreatmentOfSmokingAndHealthRelatedDiseasesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TreatmentOfSmokingAndHealthRelatedDiseasesMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Treatment of smoking and health related diseases", "label": "Treatment Of Smoking And Health Related Diseases [Member]", "documentation": "Treatment of smoking and health-related diseases." } } }, "auth_ref": [] }, "bti_TrueUpLiabilityNettingMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TrueUpLiabilityNettingMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "True-up liability", "label": "True-Up Liability, Netting [Member]", "documentation": "True-Up Liability, Netting" } } }, "auth_ref": [] }, "bti_TrustFundRaised": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TrustFundRaised", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trust fund", "label": "Trust Fund Raised", "documentation": "Trust fund raised." } } }, "auth_ref": [] }, "bti_TwoJurisdictionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TwoJurisdictionsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTobaccoRelatedLitigationOutsidetheUSAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Two Jurisdictions", "label": "Two Jurisdictions [Member]", "documentation": "Two jurisdictions." } } }, "auth_ref": [] }, "bti_TwoPointSevenEightNinePercentageNotesDueTwoThousandAndTwentyFourMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TwoPointSevenEightNinePercentageNotesDueTwoThousandAndTwentyFourMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "2.789% Notes due 2024", "label": "Two Point Seven Eight Nine Percentage Notes Due Two Thousand And Twenty Four [Member]", "documentation": "Two point seven eight nine percentage notes due two thousand and twenty four." } } }, "auth_ref": [] }, "bti_TwoPointSevenTwoSixPercentageNotesDueTwoThousandAndThirtyOneMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TwoPointSevenTwoSixPercentageNotesDueTwoThousandAndThirtyOneMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "2.726% Notes due 2031", "label": "Two Point Seven Two Six Percentage Notes Due Two Thousand And Thirty One [Member]", "documentation": "Two point seven two six percentage notes due two thousand and thirty one." } } }, "auth_ref": [] }, "bti_TwoPointTwoFiveNinePercentageNotesDueTwoThousandAndTwentyEightMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TwoPointTwoFiveNinePercentageNotesDueTwoThousandAndTwentyEightMember", "presentation": [ "http://www.bat.com/role/Cover" ], "lang": { "en-us": { "role": { "terseLabel": "2.259% Notes due 2028", "label": "Two Point Two Five Nine Percentage Notes Due Two Thousand And Twenty Eight [Member]", "documentation": "Two point two five nine percentage notes due two thousand and twenty eight." } } }, "auth_ref": [] }, "bti_TypeOfArrangementsAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfArrangementsAxis", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Type of Arrangements [Axis]", "label": "Type of Arrangements [Axis]", "documentation": "Type of Arrangements" } } }, "auth_ref": [] }, "bti_TypeOfArrangementsDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfArrangementsDomain", "presentation": [ "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Type of Arrangements [Domain]", "label": "Type of Arrangements [Domain]", "documentation": "Type of Arrangements [Domain]" } } }, "auth_ref": [] }, "bti_TypeOfServiceAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfServiceAxis", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Type Of Service", "label": "Type Of Service [Axis]", "documentation": "Type of service." } } }, "auth_ref": [] }, "bti_TypeOfServiceDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfServiceDomain", "presentation": [ "http://www.bat.com/role/OtherOperatingExpensesSummaryofAuditorsRemunerationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Type Of Service [Domain]", "label": "Type Of Service [Domain]", "documentation": "Type Of Service [Domain]" } } }, "auth_ref": [] }, "bti_TypeOfSuppliersAxis": { "xbrltype": "stringItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfSuppliersAxis", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Trading Arrangement:", "label": "Type Of Suppliers [Axis]", "documentation": "Type Of Suppliers" } } }, "auth_ref": [] }, "bti_TypeOfSuppliersDomain": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "TypeOfSuppliersDomain", "presentation": [ "http://www.bat.com/role/TradeandotherpayablesAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherpayablesPaymenttermDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Type Of Suppliers [Domain]", "label": "Type Of Suppliers [Domain]", "documentation": "Type Of Suppliers [Domain]" } } }, "auth_ref": [] }, "ifrs-full_TypesOfAntidilutiveInstrumentsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfAntidilutiveInstrumentsAxis", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of antidilutive instruments [axis]", "label": "Types of antidilutive instruments [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r139" ] }, "ifrs-full_TypesOfAntidilutiveInstrumentsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfAntidilutiveInstrumentsDomain", "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of antidilutive instruments [domain]", "label": "Types of antidilutive instruments [domain]" } }, "en": { "role": { "documentation": "This member stands for antidilutive instruments. Instruments are antidilutive when their conversion to ordinary shares would increase earnings per share or decrease loss per share from continuing operations. The calculation of diluted earnings per share does not assume conversion, exercise, or other issue of potential ordinary shares that would have an antidilutive effect on earnings per share. It also represents the standard value for the \u2018Types of antidilutive instruments' axis if no other member is used." } } }, "auth_ref": [ "r139" ] }, "ifrs-full_TypesOfContractsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfContractsAxis", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of contracts [axis]", "label": "Types of contracts [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r436", "r439" ] }, "ifrs-full_TypesOfContractsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfContractsDomain", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsOperatingSubsidiariesExpensesandPaymentsunderStateSettlementAgreementsDetails", "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesMasterSettlementsAgreementAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of contracts", "label": "Types of contracts [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of contracts with customers. It also represents the standard value for the 'Types of contracts' axis if no other member is used." } } }, "auth_ref": [ "r436", "r439" ] }, "ifrs-full_TypesOfFinancialLiabilitiesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfFinancialLiabilitiesAxis", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of financial liabilities [axis]", "label": "Types of financial liabilities [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r325", "r326" ] }, "ifrs-full_TypesOfFinancialLiabilitiesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfFinancialLiabilitiesDomain", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/TradeandotherpayablesSupplierFinancingArrangementsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of financial liabilities [domain]", "label": "Types of financial liabilities [domain]" } }, "en": { "role": { "documentation": "This member stands for aggregated types of financial liabilities. It also represents the standard value for the 'Types of financial liabilities' axis if no other member is used. [Refer: Financial assets]" } } }, "auth_ref": [ "r325", "r326" ] }, "ifrs-full_TypesOfHedgesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfHedgesAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of hedges [axis]", "label": "Types of hedges [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r296", "r301", "r304" ] }, "ifrs-full_TypesOfHedgesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfHedgesDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails", "http://www.bat.com/role/CashandCashEquivalentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsAdditionalInformationDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofDerivativesDetails", "http://www.bat.com/role/DerivativeFinancialInstrumentsSummaryofItemsDesignatedAsHedgingInstrumentsDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementScheduleofDetailedInformationAboutHedgedItemsbyRiskCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of hedges", "label": "Types of hedges [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of hedges. It also represents the standard value for the 'Types of hedges' axis if no other member is used." } } }, "auth_ref": [ "r296", "r301", "r304" ] }, "ifrs-full_TypesOfInterestRatesAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfInterestRatesAxis", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of interest rates [axis]", "label": "Types of interest rates [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r626" ] }, "ifrs-full_TypesOfInterestRatesDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfInterestRatesDomain", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of interest rates", "label": "Types of interest rates [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of interest rates. It also represents the standard value for the 'Types of interest rates' axis if no other member is used. [Refer: Interest rate risk [member]]" } } }, "auth_ref": [ "r626" ] }, "ifrs-full_TypesOfRisksAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfRisksAxis", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of risks [axis]", "label": "Types of risks [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r253", "r254", "r255", "r257", "r290", "r307", "r308", "r377" ] }, "ifrs-full_TypesOfRisksDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfRisksDomain", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyInterestRateChangesDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementFairValueEstimationAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of risks", "label": "Types of risks [domain]" } }, "en": { "role": { "documentation": "This member stands for all types of risks. It also represents the standard value for the 'Types of risks' axis if no other member is used." } } }, "auth_ref": [ "r253", "r254", "r255", "r257", "r290", "r307", "r308", "r377" ] }, "ifrs-full_TypesOfSharebasedPaymentArrangementsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfSharebasedPaymentArrangementsAxis", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of share-based payment arrangements [axis]", "label": "Types of share-based payment arrangements [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r269" ] }, "ifrs-full_TypesOfSharebasedPaymentArrangementsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "TypesOfSharebasedPaymentArrangementsDomain", "presentation": [ "http://www.bat.com/role/CapitalandreservesAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledDSBSSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofMovementsforEquityandCashSettledLTIPSchemeDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentExpenseDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails", "http://www.bat.com/role/SharebasedpaymentsSummaryofValuationAssumptionsUsedinModelsDetails", "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Types of share-based payment arrangements", "label": "Types of share-based payment arrangements [domain]" } }, "en": { "role": { "documentation": "This member stands for an agreement between the entity or another group entity or any shareholder of the group entity and another party (including an employee) that entitles the other party to receive (a) cash or other assets of the entity for amounts that are based on the price (or value) of equity instruments (including shares or share options) of the entity or another group entity; or (b) equity instruments (including shares or share options) of the entity or another group entity, provided that the specified vesting conditions, if any, are met. It also represents the standard value for the 'Types of share-based payment arrangements' axis if no other member is used." } } }, "auth_ref": [ "r269" ] }, "country_US": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "US", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsStateSettlementAgreementsAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/EmployeeBenefitCostsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/OtherOperatingIncomeDetails", "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United States", "label": "UNITED STATES" } } }, "auth_ref": [] }, "currency_USD": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/currency/2024", "localname": "USD", "presentation": [ "http://www.bat.com/role/BorrowingsScheduleofAnalysisofBorrowingsbyCurrencyDetails", "http://www.bat.com/role/CashandCashEquivalentsSummaryofCashandCashEquivalentsDenominatedintheFunctionalCurrencyoftheSubsidiaryUndertakingorOtherCurrenciesDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementCurrencyRiskAdditionalInformationDetails", "http://www.bat.com/role/TradeandotherreceivablesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "US dollar", "label": "United States of America, Dollars" } } }, "auth_ref": [] }, "bti_USTobaccoLitigationMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "USTobaccoLitigationMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "US Tobacco litigation", "label": "U S Tobacco Litigation [Member]", "documentation": "US tobacco litigation." } } }, "auth_ref": [] }, "bti_USTobaccoRelatedActionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "USTobaccoRelatedActionsMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsIndividualCasesAdditionalInformationDetails", "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "US tobacco related actions", "label": "US Tobacco Related Actions [Member]", "documentation": "US tobacco related actions." } } }, "auth_ref": [] }, "bti_UnPaidVATAndSupplementaryDutyAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnPaidVATAndSupplementaryDutyAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Un-paid VAT and Supplementary Duty amount", "label": "Un Paid VAT And Supplementary Duty Amount", "documentation": "Un-paid VAT and Supplementary Duty amount." } } }, "auth_ref": [] }, "bti_UndistributedEarningsOfAssociatesAndSubsidiariesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UndistributedEarningsOfAssociatesAndSubsidiariesMember", "presentation": [ "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Undistributed earnings of associates and subsidiaries", "label": "Undistributed Earnings Of Associates And Subsidiaries [Member]", "documentation": "Undistributed Earnings Of Associates And Subsidiaries" } } }, "auth_ref": [] }, "ifrs-full_UndrawnBorrowingFacilities": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UndrawnBorrowingFacilities", "crdr": "credit", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Undrawn committed borrowing facilities", "label": "Undrawn borrowing facilities" } }, "en": { "role": { "documentation": "The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]" } } }, "auth_ref": [ "r422" ] }, "ecd_UndrlygSecurityMktPriceChngPct": { "xbrltype": "pureItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "UndrlygSecurityMktPriceChngPct", "presentation": [ "http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" ], "lang": { "en-us": { "role": { "label": "Underlying Security Market Price Change, Percent", "terseLabel": "Underlying Security Market Price Change" } } }, "auth_ref": [ "r549" ] }, "bti_UnfundedHealthcareExpectedSettlementBetween10And20Years": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnfundedHealthcareExpectedSettlementBetween10And20Years", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unfunded healthcare expected settlement between 10 and 20 years", "label": "Unfunded Healthcare Expected Settlement Between 10 and 20 Years", "documentation": "Unfunded Healthcare Expected Settlement Between 10 and 20 Years" } } }, "auth_ref": [] }, "bti_UnfundedHealthcareExpectedSettlementBetween20And30Years": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnfundedHealthcareExpectedSettlementBetween20And30Years", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unfunded healthcare expected settlement between 20 and 30 years", "label": "Unfunded Healthcare Expected Settlement Between 20 and 30 Years", "documentation": "Unfunded Healthcare Expected Settlement Between 20 and 30 Years" } } }, "auth_ref": [] }, "bti_UnfundedHealthcareExpectedSettlementWithin10Years": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnfundedHealthcareExpectedSettlementWithin10Years", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unfunded healthcare expected settlement within 10 years", "label": "Unfunded Healthcare Expected Settlement Within 10 Years", "documentation": "Unfunded Healthcare Expected Settlement Within 10 Years" } } }, "auth_ref": [] }, "bti_UnfundedPensionExpectedSettlementAfter30Years": { "xbrltype": "percentItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnfundedPensionExpectedSettlementAfter30Years", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unfunded healthcare expected settlement after 30 years", "label": "Unfunded Pension Expected Settlement After 30 Years", "documentation": "Unfunded Healthcare Expected Settlement After 30 Years" } } }, "auth_ref": [] }, "bti_UnitedKingdomAndCanadaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnitedKingdomAndCanadaMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "UK and Canada", "label": "United Kingdom And Canada [Member]", "documentation": "United Kingdom And Canada" } } }, "auth_ref": [] }, "bti_UnitedStatesAndCanadaMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnitedStatesAndCanadaMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United States and Canada", "label": "United States and Canada [Member]", "documentation": "United States and Canada" } } }, "auth_ref": [] }, "bti_UnitedStatesAndUnitedKingdomMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnitedStatesAndUnitedKingdomMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United States and United Kingdom", "label": "United States and United Kingdom [Member]", "documentation": "United States and United Kingdom" } } }, "auth_ref": [] }, "bti_UnitedStatesSegmentMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnitedStatesSegmentMember", "presentation": [ "http://www.bat.com/role/GroupemployeesSummaryofAverageNumberofPersonsEmployedbyGroupandAssociatesDetails", "http://www.bat.com/role/SegmentalanalysesAdditionalInformationDetails", "http://www.bat.com/role/SegmentalanalysesDisclosureofOperatingSegmentInformationDetails", "http://www.bat.com/role/SegmentalanalysesSummaryofDepreciationAmortisationandImpairmentChargesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "U.S.", "label": "United States Segment [Member]", "documentation": "United States segment." } } }, "auth_ref": [] }, "bti_UnitedStatesSouthAfricaPeruMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnitedStatesSouthAfricaPeruMember", "presentation": [ "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "United States, South Africa, Peru", "label": "United States, South Africa, Peru [Member]", "documentation": "United States, South Africa, Peru" } } }, "auth_ref": [] }, "bti_UnlistedAssociatesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnlistedAssociatesMember", "presentation": [ "http://www.bat.com/role/InvestmentsinAssociatesandJointVenturesSummaryofInvestmentsInAssociatesAndJointVenturesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unlisted Associates", "label": "Unlisted Associates [Member]", "documentation": "Unlisted associates." } } }, "auth_ref": [] }, "bti_UnlistedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnlistedMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsinFundedSchemeAssetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unlisted", "label": "Unlisted [Member]", "documentation": "Unlisted." } } }, "auth_ref": [] }, "ifrs-full_UnobservableInputsAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnobservableInputsAxis", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unobservable inputs [axis]", "label": "Unobservable inputs [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r232", "r625" ] }, "ifrs-full_UnobservableInputsDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnobservableInputsDomain", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/FinancialinstrumentsandriskmanagementInterestRateRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unobservable inputs [domain]", "label": "Unobservable inputs [domain]" } }, "en": { "role": { "documentation": "This member stands for all the unobservable inputs. It also represents the standard value for the 'Unobservable inputs' axis if no other member is used." } } }, "auth_ref": [ "r232", "r625" ] }, "bti_UnpaidExciseDutyAmount": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnpaidExciseDutyAmount", "crdr": "credit", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Un paid excise duty amount", "label": "Unpaid Excise Duty Amount", "documentation": "Unpaid Excise Duty Amount" } } }, "auth_ref": [] }, "bti_UnrecognisedFundedSchemeSurplusesDeficit": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnrecognisedFundedSchemeSurplusesDeficit", "crdr": "credit", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesSummaryofMovementsintheUnrecognisedSchemeSurplusesRecognisedinOtherComprehensiveIncomeDetails" ], "lang": { "en-us": { "role": { "negatedLabel": "Unrecognised funded scheme surpluses", "negatedPeriodStartLabel": "Unrecognised funded scheme surpluses, beginning balance", "negatedPeriodEndLabel": "Unrecognised funded scheme surpluses, ending balance", "label": "Unrecognised Funded Scheme Surpluses Deficit", "documentation": "Unrecognised funded scheme surpluses and deficit." } } }, "auth_ref": [] }, "bti_UnsecuredNotes": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnsecuredNotes", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SummarisedfinancialinformationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unsecured notes", "label": "Unsecured Notes", "documentation": "Unsecured notes." } } }, "auth_ref": [] }, "bti_UntilMarchTwoThousandAndTwentyFiveMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UntilMarchTwoThousandAndTwentyFiveMember", "presentation": [ "http://www.bat.com/role/FinancialinstrumentsandriskmanagementLiquidityRiskAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Until March 2025", "label": "Until March Two Thousand And Twenty Five [Member]", "documentation": "Until March 2025." } } }, "auth_ref": [] }, "ifrs-full_UnusedProvisionReversedOtherProvisions": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnusedProvisionReversedOtherProvisions", "crdr": "debit", "presentation": [ "http://www.bat.com/role/ChangesintheGroupAssetsHeldForSaleandBusinessDisposalsDetails", "http://www.bat.com/role/OtheroperatingexpensesAssetsheldforsaleAdditionalInformationDetails", "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unused provision reversed, other provisions", "negatedLabel": "Unused provision reversed, other provisions", "label": "Unused provision reversed, other provisions" } }, "en": { "role": { "documentation": "The amount reversed for unused other provisions. [Refer: Other provisions]" } } }, "auth_ref": [ "r161" ] }, "ifrs-full_UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnusedTaxCreditsForWhichNoDeferredTaxAssetRecognised", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unused tax credits for which no deferred tax asset recognised", "label": "Unused tax credits for which no deferred tax asset recognised" } }, "en": { "role": { "documentation": "The amount of unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax credits [member]]" } } }, "auth_ref": [ "r67" ] }, "ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unused tax losses for which no deferred tax asset recognised", "label": "Unused tax losses for which no deferred tax asset recognised" } }, "en": { "role": { "documentation": "The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]" } } }, "auth_ref": [ "r67" ] }, "ifrs-full_UnusedTaxLossesMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UnusedTaxLossesMember", "presentation": [ "http://www.bat.com/role/DeferredtaxAdditionalInformationDetails", "http://www.bat.com/role/DeferredtaxSummaryofReconciliationofNetDeferredTaxAssetsLiabilitiesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Tax losses", "label": "Unused tax losses [member]" } }, "en": { "role": { "documentation": "This member stands for tax losses that have been incurred and are carried forward for use against future taxable profit." } } }, "auth_ref": [ "r71" ] }, "bti_UnvestedAwardsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnvestedAwardsMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unvested", "label": "Unvested Awards [Member]", "documentation": "This member stands for unvested awards." } } }, "auth_ref": [] }, "bti_UnvestedDeferredShareBonusSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnvestedDeferredShareBonusSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DSBS, Unvested", "label": "Unvested Deferred Share Bonus Scheme [Member]", "documentation": "This member stands for unvested deferred share bonus scheme." } } }, "auth_ref": [] }, "bti_UnvestedLongTermIncentivePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnvestedLongTermIncentivePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "LTIP, Unvested", "label": "Unvested Long Term Incentive Plan [Member]", "documentation": "Member stands for unvested long-term incentive plan." } } }, "auth_ref": [] }, "bti_UnwindingDiscountedProceeds": { "xbrltype": "monetaryItemType", "nsuri": "http://www.bat.com/20241231", "localname": "UnwindingDiscountedProceeds", "crdr": "credit", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLossonDisposalofBusinessAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unwinding discounted proceeds", "label": "Unwinding Discounted Proceeds", "documentation": "Unwinding discounted proceeds." } } }, "auth_ref": [] }, "ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill": { "xbrltype": "durationItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill", "presentation": [ "http://www.bat.com/role/AccountingpoliciesDetails", "http://www.bat.com/role/DepreciationAmortisationandImpairmentCostsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Intangible assets, remaining useful lives", "label": "Useful life measured as period of time, intangible assets other than goodwill" } }, "en": { "role": { "documentation": "The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]" } } }, "auth_ref": [ "r166" ] }, "stpr_VA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "VA", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "VIRGINIA", "label": "VIRGINIA" } } }, "auth_ref": [] }, "country_VE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "VE", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsGeneralLitigationOverviewAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Venezeula", "label": "VENEZUELA" } } }, "auth_ref": [] }, "bti_VSTIndustriesLimitedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VSTIndustriesLimitedMember", "presentation": [ "http://www.bat.com/role/RelatedpartydisclosuresAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "VST Industries Limited", "label": "VST Industries Limited [Member]", "documentation": "VST Industries Limited" } } }, "auth_ref": [] }, "ifrs-full_ValuationTechniquesUsedInFairValueMeasurementAxis": { "xbrltype": "stringItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ValuationTechniquesUsedInFairValueMeasurementAxis", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Valuation techniques used in fair value measurement [axis]", "label": "Valuation techniques used in fair value measurement [axis]" } }, "en": { "role": { "documentation": "The axis of a table defines the relationship between the members in the table and the line items or concepts that complete the table." } } }, "auth_ref": [ "r232" ] }, "ifrs-full_ValuationTechniquesUsedInFairValueMeasurementDomain": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "ValuationTechniquesUsedInFairValueMeasurementDomain", "presentation": [ "http://www.bat.com/role/BorrowingsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Valuation techniques used in fair value measurement", "label": "Valuation techniques used in fair value measurement [domain]" } }, "en": { "role": { "documentation": "This member stands for valuation techniques used by the entity to measure fair value. It also represents the standard value for the 'Valuation techniques used in fair value measurement' axis if no other member is used. [Refer: At fair value [member]]" } } }, "auth_ref": [ "r232" ] }, "bti_ValueAddedTaxMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ValueAddedTaxMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsTaxDisputesAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "VAT", "label": "Value Added Tax [Member]", "documentation": "Value added tax." } } }, "auth_ref": [] }, "bti_ValueInUseCalculationOnDetailedFinancialBudgetsExtrapolatedPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ValueInUseCalculationOnDetailedFinancialBudgetsExtrapolatedPeriod", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsIndefiniteLivedIntangibleAssetsDetails", "http://www.bat.com/role/IntangibleassetsKeyassumptionsusedinassessingthedefinitelivedbrandsforimpairmentDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Value-in-use calculation on detailed financial budgets extrapolated period", "label": "Value In Use Calculation On Detailed Financial Budgets Extrapolated Period", "documentation": "Value in use calculation on detailed financial budgets extrapolated period." } } }, "auth_ref": [] }, "bti_ValueInUseCalculationOnDetailedFinancialBudgetsPeriod": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "ValueInUseCalculationOnDetailedFinancialBudgetsPeriod", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Value-in-use calculation on detailed financial budgets, period", "label": "Value In Use Calculation On Detailed Financial Budgets Period", "documentation": "Value in use calculation on detailed financial budgets period." } } }, "auth_ref": [] }, "bti_VapourMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VapourMember", "presentation": [ "http://www.bat.com/role/SegmentalanalysesDisclosureofAdditionalInformationbyProductCategoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Vapour", "label": "Vapour [Member]", "documentation": "Vapour." } } }, "auth_ref": [] }, "bti_VeloOralProductMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VeloOralProductMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Velo oral product", "label": "Velo Oral Product [Member]", "documentation": "Velo Oral Product" } } }, "auth_ref": [] }, "bti_VestedAwardsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VestedAwardsMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Vested", "label": "Vested Awards [Member]", "documentation": "This member stands for vested awards." } } }, "auth_ref": [] }, "bti_VestedDeferredShareBonusSchemeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VestedDeferredShareBonusSchemeMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "DSBS, Vested", "label": "Vested Deferred Share Bonus Scheme [Member]", "documentation": "This member stands for vested deferred share bonus scheme." } } }, "auth_ref": [] }, "bti_VestedLongTermIncentivePlanMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VestedLongTermIncentivePlanMember", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsSummaryofSharebasedPaymentLiabilityDetails" ], "lang": { "en-us": { "role": { "terseLabel": "LTIP, Vested", "label": "Vested Long Term Incentive Plan [Member]", "documentation": "Member stands for vested long-term incentive plan." } } }, "auth_ref": [] }, "ecd_VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "VstngDtFrValOfEqtyAwrdsGrntdAndVstdInCvrdYrMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member]", "terseLabel": "Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year" } } }, "auth_ref": [ "r518" ] }, "bti_VuseAltoMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VuseAltoMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Vuse Alto", "label": "Vuse Alto [Member]", "documentation": "Vuse Alto" } } }, "auth_ref": [] }, "bti_VuseVibeMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "VuseVibeMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Vuse Vibe", "label": "Vuse Vibe [Member]", "documentation": "Vuse Vibe" } } }, "auth_ref": [] }, "stpr_WA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/stpr/2024", "localname": "WA", "presentation": [ "http://www.bat.com/role/OtheroperatingexpensesLitigationcostsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Washington", "label": "WASHINGTON" } } }, "auth_ref": [] }, "ifrs-full_WagesAndSalaries": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WagesAndSalaries", "crdr": "debit", "calculation": { "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails": { "parentTag": "ifrs-full_EmployeeBenefitsExpense", "weight": 1.0, "order": 4.0 }, "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails": { "parentTag": "bti_KeyManagementPersonnelCompensationSalaryFeesBenefitsAndIncentives", "weight": 1.0, "order": 4.0 } }, "presentation": [ "http://www.bat.com/role/EmployeeBenefitCostsSummaryofEmployeeBenefitCostsDetails", "http://www.bat.com/role/RelatedpartydisclosuresSummaryofAmountsIncurredbyEntityforProvisionofKeyManagementPersonnelServicesDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Wages and salaries", "verboseLabel": "\u2013 salary", "label": "Wages and salaries" } }, "en": { "role": { "documentation": "A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense]" } } }, "auth_ref": [ "r603" ] }, "bti_WeatherEventsAndOtherNaturalConditionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WeatherEventsAndOtherNaturalConditionsMember", "presentation": [ "http://www.bat.com/role/SustainabilitycostsAdditionalinformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Severe weather events and other natural conditions", "label": "Weather Events And Other Natural Conditions [Member]", "documentation": "Weather Events And Other Natural Conditions" } } }, "auth_ref": [] }, "ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019": { "xbrltype": "durationItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageDurationOfDefinedBenefitObligation2019", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofActuarialAssumptionsRateforValuationsPlansDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Weighted average duration of liabilities (years)", "label": "Weighted average duration of defined benefit obligation" } }, "en": { "role": { "documentation": "The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]" } } }, "auth_ref": [ "r101" ] }, "ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Weighted average share price at date of exercise for share options exercised (in GBP per share)", "label": "Weighted average exercise price of share options exercised in share-based payment arrangement" } }, "en": { "role": { "documentation": "The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]]" } } }, "auth_ref": [ "r265" ] }, "ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted": { "xbrltype": "monetaryItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageFairValueAtMeasurementDateShareOptionsGranted", "crdr": "credit", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Fair value at grant date (in \u00a3 per share)", "label": "Weighted average fair value at measurement date, share options granted" } }, "en": { "role": { "documentation": "The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]" } } }, "auth_ref": [ "r271" ] }, "bti_WeightedAverageLifeExpectancyOfFemaleAtAgeFortyFive": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WeightedAverageLifeExpectancyOfFemaleAtAgeFortyFive", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Member age 45 (life expectancy at age 65), Female", "label": "Weighted Average Life Expectancy Of Female At Age Forty Five", "documentation": "Weighted average life expectancy of female at age 45." } } }, "auth_ref": [] }, "bti_WeightedAverageLifeExpectancyOfFemaleAtAgeSixtyFive": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WeightedAverageLifeExpectancyOfFemaleAtAgeSixtyFive", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Member age 65 (current life expectancy), Female", "label": "Weighted Average Life Expectancy Of Female At Age Sixty Five", "documentation": "Weighted average life expectancy of female at age 65." } } }, "auth_ref": [] }, "bti_WeightedAverageLifeExpectancyOfMaleAtAgeFortyFive": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WeightedAverageLifeExpectancyOfMaleAtAgeFortyFive", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Member age 45 (life expectancy at age 65), Male", "label": "Weighted Average Life Expectancy Of Male At Age Forty Five", "documentation": "Weighted average life expectancy of male at age 45." } } }, "auth_ref": [] }, "bti_WeightedAverageLifeExpectancyOfMaleAtAgeSixtyFive": { "xbrltype": "durationItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WeightedAverageLifeExpectancyOfMaleAtAgeSixtyFive", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesSummaryofWeightedAverageLifeExpectancyUsedtoDetermineBenefitObligationsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Member age 65 (current life expectancy), Male", "label": "Weighted Average Life Expectancy Of Male At Age Sixty Five", "documentation": "Weighted average life expectancy of male at age 65." } } }, "auth_ref": [] }, "ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019": { "xbrltype": "durationItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Weighted average remaining contractual life of outstanding shares", "label": "Weighted average remaining contractual life of outstanding share options" } }, "en": { "role": { "documentation": "The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]" } } }, "auth_ref": [ "r268" ] }, "ifrs-full_WeightedAverageSharePriceShareOptionsGranted2019": { "xbrltype": "perShareItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageSharePriceShareOptionsGranted2019", "presentation": [ "http://www.bat.com/role/SharebasedpaymentsValuationAssumptionsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Share price at date of grant (in \u00a3 per share)", "label": "Weighted average share price, share options granted" } }, "en": { "role": { "documentation": "The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]" } } }, "auth_ref": [ "r270" ] }, "ifrs-full_WeightedAverageShares": { "xbrltype": "sharesItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WeightedAverageShares", "calculation": { "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails": { "parentTag": "ifrs-full_AdjustedWeightedAverageShares", "weight": 1.0, "order": 1.0 } }, "presentation": [ "http://www.bat.com/role/EarningsPerShareSummaryofReconciliationfromBasictoDilutedEarningsPerShareDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Basic earnings/(loss) per share (ordinary shares of 25p each), Weighted average number of shares (in shares)", "label": "Weighted average number of ordinary shares used in calculating basic earnings per share" } }, "en": { "role": { "documentation": "The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor." } } }, "auth_ref": [ "r138" ] }, "ifrs-full_WhollyOrPartlyFundedDefinedBenefitPlansMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WhollyOrPartlyFundedDefinedBenefitPlansMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesAdditionalInformationDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails", "http://www.bat.com/role/RetirementBenefitSchemesScheduleofNetLiabilitiesofFundedPensionSchemesbyTerritoryDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Funded defined benefit plans", "label": "Wholly or partly funded defined benefit plans [member]" } }, "en": { "role": { "documentation": "This member stands for wholly funded or partly funded defined benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r399" ] }, "ifrs-full_WhollyUnfundedDefinedBenefitPlansMember": { "xbrltype": "domainItemType", "nsuri": "https://xbrl.ifrs.org/taxonomy/2024-03-27/ifrs-full", "localname": "WhollyUnfundedDefinedBenefitPlansMember", "presentation": [ "http://www.bat.com/role/RetirementBenefitSchemesScheduleofDefinedBenefitAmountsRecognisedinBalanceSheetsDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Unfunded Defined Benefit Plans", "label": "Wholly unfunded defined benefit plans [member]" } }, "en": { "role": { "documentation": "This member stands for wholly unfunded defined benefit plans. [Refer: Defined benefit plans [domain]]" } } }, "auth_ref": [ "r399" ] }, "bti_WindwardDividendClaimMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WindwardDividendClaimMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Windward dividend claim", "label": "Windward Dividend Claim [Member]", "documentation": "Windward Dividend Claim." } } }, "auth_ref": [] }, "bti_WindwardMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "WindwardMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsNonTobaccoRelatedLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Windward", "label": "Windward [Member]", "documentation": "Windward." } } }, "auth_ref": [] }, "bti_YoungVAmericanTobaccoCoIncMember": { "xbrltype": "domainItemType", "nsuri": "http://www.bat.com/20241231", "localname": "YoungVAmericanTobaccoCoIncMember", "presentation": [ "http://www.bat.com/role/ContingentliabilitiesandfinancialcommitmentsUSTobaccoLitigationAdditionalInformationDetails" ], "lang": { "en-us": { "role": { "terseLabel": "Young v. American Tobacco Co.", "label": "Young V American Tobacco Co Inc [Member]", "documentation": "Young v American Tobacco Co., Inc." } } }, "auth_ref": [] }, "ecd_YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/ecd/2024", "localname": "YrEndFrValOfEqtyAwrdsGrntdInCvrdYrOutsdngAndUnvstdMember", "presentation": [ "http://xbrl.sec.gov/ecd/role/PvpDisclosure" ], "lang": { "en-us": { "role": { "label": "Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member]", "terseLabel": "Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested" } } }, "auth_ref": [ "r516" ] }, "country_ZA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "ZA", "presentation": [ "http://www.bat.com/role/IntangibleassetsAdditionalInformationDetails", "http://www.bat.com/role/IntangibleassetsScheduleofCashGeneratingUnitDetails" ], "lang": { "en-us": { "role": { "terseLabel": "South Africa", "label": "SOUTH AFRICA" } } }, "auth_ref": [] } } } }, "std_ref": { "r0": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "104", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_104&doctype=Standard", "URIDate": "2024-03-27" }, "r1": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_a&doctype=Standard", "URIDate": "2024-03-27" }, "r2": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "d", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d_i&doctype=Standard", "URIDate": "2024-03-27" }, "r3": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "d", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r4": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "d", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r5": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard", "URIDate": "2024-03-27" }, "r6": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106&doctype=Standard", "URIDate": "2024-03-27" }, "r7": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106A&doctype=Standard", "URIDate": "2024-03-27" }, "r8": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "107", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_107&doctype=Standard", "URIDate": "2024-03-27" }, "r9": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "117", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_117&doctype=Standard", "URIDate": "2024-03-27" }, "r10": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "35", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_35&doctype=Standard", "URIDate": "2024-03-27" }, "r11": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_c&doctype=Standard", "URIDate": "2024-03-27" }, "r12": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_e&doctype=Standard", "URIDate": "2024-03-27" }, "r13": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_g&doctype=Standard", "URIDate": "2024-03-27" }, "r14": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "h", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_h&doctype=Standard", "URIDate": "2024-03-27" }, "r15": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_i&doctype=Standard", "URIDate": "2024-03-27" }, "r16": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "j", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_j&doctype=Standard", "URIDate": "2024-03-27" }, "r17": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "k", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_k&doctype=Standard", "URIDate": "2024-03-27" }, "r18": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "l", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_l&doctype=Standard", "URIDate": "2024-03-27" }, "r19": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "n", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_n&doctype=Standard", "URIDate": "2024-03-27" }, "r20": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "o", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_o&doctype=Standard", "URIDate": "2024-03-27" }, "r21": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "q", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_q&doctype=Standard", "URIDate": "2024-03-27" }, "r22": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "r", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_r&doctype=Standard", "URIDate": "2024-03-27" }, "r23": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "55", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard", "URIDate": "2024-03-27" }, "r24": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "56", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_56&doctype=Standard", "URIDate": "2024-03-27" }, "r25": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "61", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_61_a&doctype=Standard", "URIDate": "2024-03-27" }, "r26": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "61", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_61_b&doctype=Standard", "URIDate": "2024-03-27" }, "r27": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "61", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_61&doctype=Standard", "URIDate": "2024-03-27" }, "r28": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "66", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_66&doctype=Standard", "URIDate": "2024-03-27" }, "r29": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "69", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_69&doctype=Standard", "URIDate": "2024-03-27" }, "r30": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "7", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard", "URIDate": "2024-03-27" }, "r31": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_b&doctype=Standard", "URIDate": "2024-03-27" }, "r32": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_d&doctype=Standard", "URIDate": "2024-03-27" }, "r33": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_e&doctype=Standard", "URIDate": "2024-03-27" }, "r34": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r35": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "a", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r36": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a&doctype=Standard", "URIDate": "2024-03-27" }, "r37": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_b&doctype=Standard", "URIDate": "2024-03-27" }, "r38": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79&doctype=Standard", "URIDate": "2024-03-27" }, "r39": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81A", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81A_a&doctype=Standard", "URIDate": "2024-03-27" }, "r40": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81A", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81A_b&doctype=Standard", "URIDate": "2024-03-27" }, "r41": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81A", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81A_c&doctype=Standard", "URIDate": "2024-03-27" }, "r42": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81B", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81B_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r43": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81B", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81B_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r44": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81B", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81B_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r45": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "81B", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_81B_b_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r46": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r47": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_a&doctype=Standard", "URIDate": "2024-03-27" }, "r48": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_b&doctype=Standard", "URIDate": "2024-03-27" }, "r49": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_c&doctype=Standard", "URIDate": "2024-03-27" }, "r50": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "ca", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_ca&doctype=Standard", "URIDate": "2024-03-27" }, "r51": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82_d&doctype=Standard", "URIDate": "2024-03-27" }, "r52": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82A&doctype=Standard", "URIDate": "2024-03-27" }, "r53": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "90", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_90&doctype=Standard", "URIDate": "2024-03-27" }, "r54": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "91", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_a&doctype=Standard", "URIDate": "2024-03-27" }, "r55": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "91", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_b&doctype=Standard", "URIDate": "2024-03-27" }, "r56": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "91", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91&doctype=Standard", "URIDate": "2024-03-27" }, "r57": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "92", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_92&doctype=Standard", "URIDate": "2024-03-27" }, "r58": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "98", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_a&doctype=Standard", "URIDate": "2024-03-27" }, "r59": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "98", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_d&doctype=Standard", "URIDate": "2024-03-27" }, "r60": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "98", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_98_f&doctype=Standard", "URIDate": "2024-03-27" }, "r61": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "99", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_99&doctype=Standard", "URIDate": "2024-03-27" }, "r62": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "10", "IssueDate": "2024-01-01", "Paragraph": "21", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=10&code=ifrs-tx-2024-en-r&anchor=para_21&doctype=Standard", "URIDate": "2024-03-27" }, "r63": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "79", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_79&doctype=Standard", "URIDate": "2024-03-27" }, "r64": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "ab", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_ab&doctype=Standard", "URIDate": "2024-03-27" }, "r65": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "c", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_i&doctype=Standard", "URIDate": "2024-03-27" }, "r66": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "c", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r67": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_e&doctype=Standard", "URIDate": "2024-03-27" }, "r68": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_f&doctype=Standard", "URIDate": "2024-03-27" }, "r69": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "g", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_i&doctype=Standard", "URIDate": "2024-03-27" }, "r70": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "g", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r71": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g&doctype=Standard", "URIDate": "2024-03-27" }, "r72": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "88A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_88A&doctype=Standard", "URIDate": "2024-03-27" }, "r73": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "88B", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_88B&doctype=Standard", "URIDate": "2024-03-27" }, "r74": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS12_g79-88_TI", "URIDate": "2024-03-27" }, "r75": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "39", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_39&doctype=Standard", "URIDate": "2024-03-27" }, "r76": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_c&doctype=Standard", "URIDate": "2024-03-27" }, "r77": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_d&doctype=Standard", "URIDate": "2024-03-27" }, "r78": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "e", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_i&doctype=Standard", "URIDate": "2024-03-27" }, "r79": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "e", "Clause": "v", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_v&doctype=Standard", "URIDate": "2024-03-27" }, "r80": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "e", "Clause": "vi", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_vi&doctype=Standard", "URIDate": "2024-03-27" }, "r81": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard", "URIDate": "2024-03-27" }, "r82": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73&doctype=Standard", "URIDate": "2024-03-27" }, "r83": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "75", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_75_b&doctype=Standard", "URIDate": "2024-03-27" }, "r84": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS16_g73-79_TI", "URIDate": "2024-03-27" }, "r85": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138&doctype=Standard", "URIDate": "2024-03-27" }, "r86": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "140", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r87": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "140", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r88": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "140", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a&doctype=Standard", "URIDate": "2024-03-27" }, "r89": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_a&doctype=Standard", "URIDate": "2024-03-27" }, "r90": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_b&doctype=Standard", "URIDate": "2024-03-27" }, "r91": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "c", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r92": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "c", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r93": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_d&doctype=Standard", "URIDate": "2024-03-27" }, "r94": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_e&doctype=Standard", "URIDate": "2024-03-27" }, "r95": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard", "URIDate": "2024-03-27" }, "r96": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_g&doctype=Standard", "URIDate": "2024-03-27" }, "r97": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "142", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142&doctype=Standard", "URIDate": "2024-03-27" }, "r98": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "145", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_145_a&doctype=Standard", "URIDate": "2024-03-27" }, "r99": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "145", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_145&doctype=Standard", "URIDate": "2024-03-27" }, "r100": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "147", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_147_b&doctype=Standard", "URIDate": "2024-03-27" }, "r101": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "147", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_147_c&doctype=Standard", "URIDate": "2024-03-27" }, "r102": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "148", "Subparagraph": "d", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_148_d_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r103": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "53", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard", "URIDate": "2024-03-27" }, "r104": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Section": "Scope", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS19_g2-7_TI", "URIDate": "2024-03-27" }, "r105": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "36", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_36_a&doctype=Standard", "URIDate": "2024-03-27" }, "r106": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "36", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_36_b&doctype=Standard", "URIDate": "2024-03-27" }, "r107": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "36", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_36_e&doctype=Standard", "URIDate": "2024-03-27" }, "r108": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "36", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_36_f&doctype=Standard", "URIDate": "2024-03-27" }, "r109": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS02_g36-39_TI", "URIDate": "2024-03-27" }, "r110": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "21", "IssueDate": "2024-01-01", "Paragraph": "48", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&anchor=para_48&doctype=Standard", "URIDate": "2024-03-27" }, "r111": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "21", "IssueDate": "2024-01-01", "Paragraph": "52", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&anchor=para_52_a&doctype=Standard", "URIDate": "2024-03-27" }, "r112": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "21", "IssueDate": "2024-01-01", "Paragraph": "52", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&anchor=para_52_b&doctype=Standard", "URIDate": "2024-03-27" }, "r113": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_17_a&doctype=Standard", "URIDate": "2024-03-27" }, "r114": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_17_b&doctype=Standard", "URIDate": "2024-03-27" }, "r115": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_17_c&doctype=Standard", "URIDate": "2024-03-27" }, "r116": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_17_e&doctype=Standard", "URIDate": "2024-03-27" }, "r117": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "17", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_17&doctype=Standard", "URIDate": "2024-03-27" }, "r118": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "18", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_18_b&doctype=Standard", "URIDate": "2024-03-27" }, "r119": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "18", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_18&doctype=Standard", "URIDate": "2024-03-27" }, "r120": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "18A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_18A&doctype=Standard", "URIDate": "2024-03-27" }, "r121": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "19", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_19_c&doctype=Standard", "URIDate": "2024-03-27" }, "r122": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "19", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_19_d&doctype=Standard", "URIDate": "2024-03-27" }, "r123": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "19", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_19&doctype=Standard", "URIDate": "2024-03-27" }, "r124": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "20", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_20&doctype=Standard", "URIDate": "2024-03-27" }, "r125": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Section": "Disclosures", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS24_g13-24_TI", "URIDate": "2024-03-27" }, "r126": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "26", "IssueDate": "2024-01-01", "Paragraph": "35", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2024-en-r&anchor=para_35_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r127": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "26", "IssueDate": "2024-01-01", "Paragraph": "35", "Subparagraph": "b", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2024-en-r&anchor=para_35_b_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r128": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "26", "IssueDate": "2024-01-01", "Paragraph": "35", "Subparagraph": "b", "Clause": "viii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2024-en-r&anchor=para_35_b_viii&doctype=Standard", "URIDate": "2024-03-27" }, "r129": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Paragraph": "10", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_10&doctype=Standard", "URIDate": "2024-03-27" }, "r130": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Paragraph": "16", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r131": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Paragraph": "16", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_16_b&doctype=Standard", "URIDate": "2024-03-27" }, "r132": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r133": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_17_b&doctype=Standard", "URIDate": "2024-03-27" }, "r134": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "27", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS27_g15-17_TI", "URIDate": "2024-03-27" }, "r135": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "66", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_66&doctype=Standard", "URIDate": "2024-03-27" }, "r136": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "67", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_67&doctype=Standard", "URIDate": "2024-03-27" }, "r137": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "70", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_a&doctype=Standard", "URIDate": "2024-03-27" }, "r138": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "70", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_b&doctype=Standard", "URIDate": "2024-03-27" }, "r139": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "70", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_c&doctype=Standard", "URIDate": "2024-03-27" }, "r140": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS33_g70-73A_TI", "URIDate": "2024-03-27" }, "r141": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "126", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_126_a&doctype=Standard", "URIDate": "2024-03-27" }, "r142": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "126", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_126_b&doctype=Standard", "URIDate": "2024-03-27" }, "r143": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "126", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_126&doctype=Standard", "URIDate": "2024-03-27" }, "r144": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "129", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_129_a&doctype=Standard", "URIDate": "2024-03-27" }, "r145": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "129", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_129_b&doctype=Standard", "URIDate": "2024-03-27" }, "r146": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "130", "Subparagraph": "d", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_130_d_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r147": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "130", "Subparagraph": "f", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_130_f_i&doctype=Standard", "URIDate": "2024-03-27" }, "r148": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "130", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_130_g&doctype=Standard", "URIDate": "2024-03-27" }, "r149": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_a&doctype=Standard", "URIDate": "2024-03-27" }, "r150": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_b&doctype=Standard", "URIDate": "2024-03-27" }, "r151": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "Subparagraph": "d", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_d_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r152": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "Subparagraph": "e", "Clause": "iiA", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_e_iiA&doctype=Standard", "URIDate": "2024-03-27" }, "r153": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "Subparagraph": "e", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134_e_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r154": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "134", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_134&doctype=Standard", "URIDate": "2024-03-27" }, "r155": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "135", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_135_a&doctype=Standard", "URIDate": "2024-03-27" }, "r156": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "135", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_135_b&doctype=Standard", "URIDate": "2024-03-27" }, "r157": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "135", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_135&doctype=Standard", "URIDate": "2024-03-27" }, "r158": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_a&doctype=Standard", "URIDate": "2024-03-27" }, "r159": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_b&doctype=Standard", "URIDate": "2024-03-27" }, "r160": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_c&doctype=Standard", "URIDate": "2024-03-27" }, "r161": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_d&doctype=Standard", "URIDate": "2024-03-27" }, "r162": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84&doctype=Standard", "URIDate": "2024-03-27" }, "r163": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "86", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_86_a&doctype=Standard", "URIDate": "2024-03-27" }, "r164": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "86", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_86&doctype=Standard", "URIDate": "2024-03-27" }, "r165": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "88", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_88&doctype=Standard", "URIDate": "2024-03-27" }, "r166": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_a&doctype=Standard", "URIDate": "2024-03-27" }, "r167": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_c&doctype=Standard", "URIDate": "2024-03-27" }, "r168": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_i&doctype=Standard", "URIDate": "2024-03-27" }, "r169": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "vi", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vi&doctype=Standard", "URIDate": "2024-03-27" }, "r170": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "vii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vii&doctype=Standard", "URIDate": "2024-03-27" }, "r171": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e&doctype=Standard", "URIDate": "2024-03-27" }, "r172": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118&doctype=Standard", "URIDate": "2024-03-27" }, "r173": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "122", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_122_a&doctype=Standard", "URIDate": "2024-03-27" }, "r174": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "122", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_122_e&doctype=Standard", "URIDate": "2024-03-27" }, "r175": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "126", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_126&doctype=Standard", "URIDate": "2024-03-27" }, "r176": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IAS38_g118-128_TI", "URIDate": "2024-03-27" }, "r177": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "39", "IssueDate": "2024-01-01", "Paragraph": "102", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2024-en-r&anchor=para_102_a&doctype=Standard", "URIDate": "2024-03-27" }, "r178": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "39", "IssueDate": "2024-01-01", "Paragraph": "86", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2024-en-r&anchor=para_86_a&doctype=Standard", "URIDate": "2024-03-27" }, "r179": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "39", "IssueDate": "2024-01-01", "Paragraph": "86", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2024-en-r&anchor=para_86_b&doctype=Standard", "URIDate": "2024-03-27" }, "r180": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "39", "IssueDate": "2024-01-01", "Paragraph": "86", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2024-en-r&anchor=para_86_c&doctype=Standard", "URIDate": "2024-03-27" }, "r181": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "40", "IssueDate": "2024-01-01", "Paragraph": "32A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2024-en-r&anchor=para_32A&doctype=Standard", "URIDate": "2024-03-27" }, "r182": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "40", "IssueDate": "2024-01-01", "Paragraph": "76", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2024-en-r&anchor=para_76&doctype=Standard", "URIDate": "2024-03-27" }, "r183": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "40", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2024-en-r&anchor=para_79_c&doctype=Standard", "URIDate": "2024-03-27" }, "r184": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "40", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2024-en-r&anchor=para_79_d&doctype=Standard", "URIDate": "2024-03-27" }, "r185": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "41", "IssueDate": "2024-01-01", "Paragraph": "50", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_50&doctype=Standard", "URIDate": "2024-03-27" }, "r186": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "41", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_54_f&doctype=Standard", "URIDate": "2024-03-27" }, "r187": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "10", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_10&doctype=Standard", "URIDate": "2024-03-27" }, "r188": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "18", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_18_b&doctype=Standard", "URIDate": "2024-03-27" }, "r189": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "21", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_21&doctype=Standard", "URIDate": "2024-03-27" }, "r190": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "25", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard", "URIDate": "2024-03-27" }, "r191": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "28", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_28&doctype=Standard", "URIDate": "2024-03-27" }, "r192": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "31", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_31&doctype=Standard", "URIDate": "2024-03-27" }, "r193": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "39", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_39&doctype=Standard", "URIDate": "2024-03-27" }, "r194": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "40", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_40_a&doctype=Standard", "URIDate": "2024-03-27" }, "r195": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "44H", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44H_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r196": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "44H", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44H_b_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r197": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "44H", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44H_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r198": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "45", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard", "URIDate": "2024-03-27" }, "r199": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "50", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_50_d&doctype=Standard", "URIDate": "2024-03-27" }, "r200": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "24", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_24_a&doctype=Standard", "URIDate": "2024-03-27" }, "r201": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "24", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_24_b&doctype=Standard", "URIDate": "2024-03-27" }, "r202": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "32", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_32_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r203": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "32", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_32_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r204": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "IG10", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_IG10&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r205": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "10", "IssueDate": "2024-01-01", "Paragraph": "22", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=10&code=ifrs-tx-2024-en-r&anchor=para_22&doctype=Standard", "URIDate": "2024-03-27" }, "r206": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "12", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_12_e&doctype=Standard", "URIDate": "2024-03-27" }, "r207": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "12", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_12_f&doctype=Standard", "URIDate": "2024-03-27" }, "r208": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "19", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19&doctype=Standard", "URIDate": "2024-03-27" }, "r209": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "19B", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_19B_c&doctype=Standard", "URIDate": "2024-03-27" }, "r210": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "2", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_2_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r211": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "21", "Subparagraph": "a", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_a_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r212": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "21", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r213": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "21", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r214": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B10", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B10_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r215": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r216": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_i&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r217": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_ii&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r218": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_iii&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r219": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_iv&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r220": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "ix", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_ix&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r221": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "v", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_v&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r222": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B12", "Subparagraph": "b", "Clause": "viii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B12_b_viii&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r223": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B13", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r224": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B13", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B13_f&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r225": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B13", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B13_g&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r226": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B16", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B16&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r227": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B4", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B4_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r228": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B4", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B4_d&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r229": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Section": "Objective", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS12_g1-4_TI", "URIDate": "2024-03-27" }, "r230": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_a&doctype=Standard", "URIDate": "2024-03-27" }, "r231": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_b&doctype=Standard", "URIDate": "2024-03-27" }, "r232": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_d&doctype=Standard", "URIDate": "2024-03-27" }, "r233": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_e&doctype=Standard", "URIDate": "2024-03-27" }, "r234": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93&doctype=Standard", "URIDate": "2024-03-27" }, "r235": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "14", "IssueDate": "2024-01-01", "Paragraph": "33", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=14&code=ifrs-tx-2024-en-r&anchor=para_33_b&doctype=Standard", "URIDate": "2024-03-27" }, "r236": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "15", "IssueDate": "2024-01-01", "Paragraph": "115", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_115&doctype=Standard", "URIDate": "2024-03-27" }, "r237": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "15", "IssueDate": "2024-01-01", "Paragraph": "120", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_120_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r238": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "33", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_33&doctype=Standard", "URIDate": "2024-03-27" }, "r239": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "47", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard", "URIDate": "2024-03-27" }, "r240": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "47", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard", "URIDate": "2024-03-27" }, "r241": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_b&doctype=Standard", "URIDate": "2024-03-27" }, "r242": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_c&doctype=Standard", "URIDate": "2024-03-27" }, "r243": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_d&doctype=Standard", "URIDate": "2024-03-27" }, "r244": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "Subparagraph": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53_i&doctype=Standard", "URIDate": "2024-03-27" }, "r245": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard", "URIDate": "2024-03-27" }, "r246": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "55", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard", "URIDate": "2024-03-27" }, "r247": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "94", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_94&doctype=Standard", "URIDate": "2024-03-27" }, "r248": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "95", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_95&doctype=Standard", "URIDate": "2024-03-27" }, "r249": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "97", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_97&doctype=Standard", "URIDate": "2024-03-27" }, "r250": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "109", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_109&doctype=Standard", "URIDate": "2024-03-27" }, "r251": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "109A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_109A&doctype=Standard", "URIDate": "2024-03-27" }, "r252": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "120", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_120&doctype=Standard", "URIDate": "2024-03-27" }, "r253": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "124", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_124&doctype=Standard", "URIDate": "2024-03-27" }, "r254": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "125", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_125&doctype=Standard", "URIDate": "2024-03-27" }, "r255": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "127", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_127&doctype=Standard", "URIDate": "2024-03-27" }, "r256": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "128", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r257": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "128", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a&doctype=Standard", "URIDate": "2024-03-27" }, "r258": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "130", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_130&doctype=Standard", "URIDate": "2024-03-27" }, "r259": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "132", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_132_b&doctype=Standard", "URIDate": "2024-03-27" }, "r260": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "C32", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_C32&doctype=Appendix&subtype=C", "URIDate": "2024-03-27" }, "r261": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "44", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_44&doctype=Standard", "URIDate": "2024-03-27" }, "r262": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r263": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r264": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r265": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r266": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "vi", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_vi&doctype=Standard", "URIDate": "2024-03-27" }, "r267": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "b", "Clause": "vii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_b_vii&doctype=Standard", "URIDate": "2024-03-27" }, "r268": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45_d&doctype=Standard", "URIDate": "2024-03-27" }, "r269": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "45", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard", "URIDate": "2024-03-27" }, "r270": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "47", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_47_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r271": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "47", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard", "URIDate": "2024-03-27" }, "r272": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "50", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_50&doctype=Standard", "URIDate": "2024-03-27" }, "r273": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "51", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2024-en-r&anchor=para_51_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r274": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_c&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r275": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_f&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r276": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "Subparagraph": "g", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_g_i&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r277": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "Subparagraph": "j", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_j&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r278": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "Subparagraph": "l", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64_l&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r279": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r280": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B67", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_b_i&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r281": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B67", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_c&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r282": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B67", "Subparagraph": "d", "Clause": "v", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r283": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B67", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r284": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B67", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B67&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r285": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Section": "Disclosures", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS03_g59-63_TI", "URIDate": "2024-03-27" }, "r286": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "5", "IssueDate": "2024-01-01", "Paragraph": "33", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2024-en-r&anchor=para_33_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r287": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "5", "IssueDate": "2024-01-01", "Section": "Presentation and disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS05_g30-42_TI", "URIDate": "2024-03-27" }, "r288": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "13C", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_13C_c&doctype=Standard", "URIDate": "2024-03-27" }, "r289": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "13C", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_13C_e&doctype=Standard", "URIDate": "2024-03-27" }, "r290": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "21C", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_21C&doctype=Standard", "URIDate": "2024-03-27" }, "r291": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "23A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_23A&doctype=Standard", "URIDate": "2024-03-27" }, "r292": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "23B", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_23B_a&doctype=Standard", "URIDate": "2024-03-27" }, "r293": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24A", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A_b&doctype=Standard", "URIDate": "2024-03-27" }, "r294": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24A", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A_c&doctype=Standard", "URIDate": "2024-03-27" }, "r295": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24A", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A_d&doctype=Standard", "URIDate": "2024-03-27" }, "r296": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24A&doctype=Standard", "URIDate": "2024-03-27" }, "r297": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24B", "Subparagraph": "a", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r298": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24B", "Subparagraph": "a", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_a_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r299": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24B", "Subparagraph": "b", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_i&doctype=Standard", "URIDate": "2024-03-27" }, "r300": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24B", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B_b_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r301": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24B", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24B&doctype=Standard", "URIDate": "2024-03-27" }, "r302": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24C", "Subparagraph": "a", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_a_i&doctype=Standard", "URIDate": "2024-03-27" }, "r303": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24C", "Subparagraph": "b", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_b_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r304": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24C", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C&doctype=Standard", "URIDate": "2024-03-27" }, "r305": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "24E", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24E_a&doctype=Standard", "URIDate": "2024-03-27" }, "r306": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "25", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard", "URIDate": "2024-03-27" }, "r307": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "33", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_33&doctype=Standard", "URIDate": "2024-03-27" }, "r308": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "34", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_34&doctype=Standard", "URIDate": "2024-03-27" }, "r309": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35H", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r310": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35H", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard", "URIDate": "2024-03-27" }, "r311": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35I", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35I&doctype=Standard", "URIDate": "2024-03-27" }, "r312": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35K", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K_a&doctype=Standard", "URIDate": "2024-03-27" }, "r313": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35K", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K&doctype=Standard", "URIDate": "2024-03-27" }, "r314": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35M", "Subparagraph": "b", "Clause": "iii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M_b_iii&doctype=Standard", "URIDate": "2024-03-27" }, "r315": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35M", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M&doctype=Standard", "URIDate": "2024-03-27" }, "r316": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "36", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_36&doctype=Standard", "URIDate": "2024-03-27" }, "r317": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "42E", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42E_b&doctype=Standard", "URIDate": "2024-03-27" }, "r318": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "42E", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42E_e&doctype=Standard", "URIDate": "2024-03-27" }, "r319": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "42I", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_42I&doctype=Standard", "URIDate": "2024-03-27" }, "r320": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "6", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_6&doctype=Standard", "URIDate": "2024-03-27" }, "r321": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "7", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard", "URIDate": "2024-03-27" }, "r322": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "8", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_a&doctype=Standard", "URIDate": "2024-03-27" }, "r323": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "8", "Subparagraph": "h", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_h&doctype=Standard", "URIDate": "2024-03-27" }, "r324": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "8", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8&doctype=Standard", "URIDate": "2024-03-27" }, "r325": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B51", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B51&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r326": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B52", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B52&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r327": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Section": "Defined terms", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&doctype=Appendix&subtype=A&dita_xref=IFRS07_APPA_TI", "URIDate": "2024-03-27" }, "r328": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Section": "Scope", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS07_g3-5A_TI", "URIDate": "2024-03-27" }, "r329": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_a&doctype=Standard", "URIDate": "2024-03-27" }, "r330": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_d&doctype=Standard", "URIDate": "2024-03-27" }, "r331": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_g&doctype=Standard", "URIDate": "2024-03-27" }, "r332": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "Subparagraph": "h", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23_h&doctype=Standard", "URIDate": "2024-03-27" }, "r333": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23&doctype=Standard", "URIDate": "2024-03-27" }, "r334": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "24", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_24_a&doctype=Standard", "URIDate": "2024-03-27" }, "r335": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_a&doctype=Standard", "URIDate": "2024-03-27" }, "r336": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_b&doctype=Standard", "URIDate": "2024-03-27" }, "r337": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_c&doctype=Standard", "URIDate": "2024-03-27" }, "r338": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_e&doctype=Standard", "URIDate": "2024-03-27" }, "r339": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28&doctype=Standard", "URIDate": "2024-03-27" }, "r340": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "32", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_32&doctype=Standard", "URIDate": "2024-03-27" }, "r341": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "33", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_33_a&doctype=Standard", "URIDate": "2024-03-27" }, "r342": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "33", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_33_b&doctype=Standard", "URIDate": "2024-03-27" }, "r343": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "33", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_33&doctype=Standard", "URIDate": "2024-03-27" }, "r344": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "34", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_34&doctype=Standard", "URIDate": "2024-03-27" }, "r345": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Section": "Disclosure", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&doctype=Standard&dita_xref=IFRS08_g20-24_TI", "URIDate": "2024-03-27" }, "r346": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "9", "IssueDate": "2024-01-01", "Paragraph": "6.5.11", "Subparagraph": "d", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_6.5.11_d_i&doctype=Standard", "URIDate": "2024-03-27" }, "r347": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "9", "IssueDate": "2024-01-01", "Paragraph": "6.5.11", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_6.5.11&doctype=Standard", "URIDate": "2024-03-27" }, "r348": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "9", "IssueDate": "2024-01-01", "Paragraph": "6.5.13", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_6.5.13_a&doctype=Standard", "URIDate": "2024-03-27" }, "r349": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "9", "IssueDate": "2024-01-01", "Paragraph": "7.2.34", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_7.2.34&doctype=Standard", "URIDate": "2024-03-27" }, "r350": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "IFRS", "Number": "9", "IssueDate": "2024-01-01", "Paragraph": "7.2.42", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2024-en-r&anchor=para_7.2.42&doctype=Standard", "URIDate": "2024-03-27" }, "r351": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "04", "Paragraph": "a", "Publisher": "SEC" }, "r352": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r353": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12", "Paragraph": "Column C", "Footnote": "5", "Publisher": "SEC" }, "r354": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12A", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r355": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12A", "Paragraph": "Column C", "Footnote": "4", "Publisher": "SEC" }, "r356": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12B", "Paragraph": "Column A", "Subparagraph": "(a)", "Footnote": "4", "Publisher": "SEC" }, "r357": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12B", "Paragraph": "Column A", "Subparagraph": "(b)", "Footnote": "4", "Publisher": "SEC" }, "r358": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12B", "Paragraph": "Column C", "Footnote": "2", "Publisher": "SEC" }, "r359": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "14", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r360": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "14", "Paragraph": "Column F", "Footnote": "7", "Publisher": "SEC" }, "r361": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r362": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column B", "Publisher": "SEC" }, "r363": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column C", "Publisher": "SEC" }, "r364": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column D", "Publisher": "SEC" }, "r365": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column E", "Footnote": "4", "Publisher": "SEC" }, "r366": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column E", "Publisher": "SEC" }, "r367": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column F", "Publisher": "SEC" }, "r368": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column G", "Publisher": "SEC" }, "r369": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column H", "Publisher": "SEC" }, "r370": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "28", "Paragraph": "Column I", "Publisher": "SEC" }, "r371": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "29", "Paragraph": "Column A", "Footnote": "4", "Publisher": "SEC" }, "r372": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "4", "Subsection": "08", "Paragraph": "m", "Subparagraph": "(1)(iii)", "Publisher": "SEC" }, "r373": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "4", "Subsection": "08", "Paragraph": "m", "Subparagraph": "(2)(ii)", "Publisher": "SEC" }, "r374": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Staff Accounting Bulletin (SAB)", "Number": "Topic 11", "Section": "M", "Paragraph": "Question 2", "Publisher": "SEC" }, "r375": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Staff Accounting Bulletin (SAB)", "Number": "Topic 5", "Section": "Y", "Paragraph": "Question 2", "Publisher": "SEC" }, "r376": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Name": "Staff Accounting Bulletin (SAB)", "Number": "Topic 5", "Section": "Y", "Paragraph": "Question 4", "Publisher": "SEC" }, "r377": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Note": "Effective 2025-01-01", "Name": "IAS", "Number": "21", "IssueDate": "2024-01-01", "Paragraph": "A19", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2024-en-r&anchor=para_A19_f&doctype=Standard", "URIDate": "2024-03-27" }, "r378": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "102", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_102&doctype=Standard", "URIDate": "2024-03-27" }, "r379": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "103", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_103&doctype=Standard", "URIDate": "2024-03-27" }, "r380": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "108", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_108&doctype=Standard", "URIDate": "2024-03-27" }, "r381": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "68", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_68&doctype=Standard", "URIDate": "2024-03-27" }, "r382": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_b&doctype=Standard", "URIDate": "2024-03-27" }, "r383": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_c&doctype=Standard", "URIDate": "2024-03-27" }, "r384": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_e&doctype=Standard", "URIDate": "2024-03-27" }, "r385": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "82A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_82A&doctype=Standard", "URIDate": "2024-03-27" }, "r386": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "IG6", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_IG6&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r387": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "10", "IssueDate": "2024-01-01", "Paragraph": "22", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=10&code=ifrs-tx-2024-en-r&anchor=para_22_c&doctype=Standard", "URIDate": "2024-03-27" }, "r388": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "10", "IssueDate": "2024-01-01", "Paragraph": "22", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=10&code=ifrs-tx-2024-en-r&anchor=para_22_f&doctype=Standard", "URIDate": "2024-03-27" }, "r389": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "80", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80_a&doctype=Standard", "URIDate": "2024-03-27" }, "r390": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "80", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80_b&doctype=Standard", "URIDate": "2024-03-27" }, "r391": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "80", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80_c&doctype=Standard", "URIDate": "2024-03-27" }, "r392": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "80", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80_d&doctype=Standard", "URIDate": "2024-03-27" }, "r393": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "37", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_37_a&doctype=Standard", "URIDate": "2024-03-27" }, "r394": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "37", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_37_c&doctype=Standard", "URIDate": "2024-03-27" }, "r395": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_a&doctype=Standard", "URIDate": "2024-03-27" }, "r396": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_b&doctype=Standard", "URIDate": "2024-03-27" }, "r397": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_c&doctype=Standard", "URIDate": "2024-03-27" }, "r398": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_d&doctype=Standard", "URIDate": "2024-03-27" }, "r399": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_e&doctype=Standard", "URIDate": "2024-03-27" }, "r400": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "142", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_b&doctype=Standard", "URIDate": "2024-03-27" }, "r401": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "142", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_c&doctype=Standard", "URIDate": "2024-03-27" }, "r402": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "147", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_147_c&doctype=Standard", "URIDate": "2024-03-27" }, "r403": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "24", "IssueDate": "2024-01-01", "Paragraph": "21", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2024-en-r&anchor=para_21_a&doctype=Standard", "URIDate": "2024-03-27" }, "r404": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "32", "IssueDate": "2024-01-01", "Paragraph": "IE33", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=32&code=ifrs-tx-2024-en-r&anchor=para_IE33&doctype=Illustrative%20Examples", "URIDate": "2024-03-27" }, "r405": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "36", "IssueDate": "2024-01-01", "Paragraph": "127", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_127&doctype=Standard", "URIDate": "2024-03-27" }, "r406": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "70", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_70&doctype=Standard", "URIDate": "2024-03-27" }, "r407": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "87", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_87&doctype=Standard", "URIDate": "2024-03-27" }, "r408": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "88", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_88&doctype=Standard", "URIDate": "2024-03-27" }, "r409": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Section": "Example 10 A court case", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex10_TI", "URIDate": "2024-03-27" }, "r410": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Section": "Example 4 Refunds policy", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_C_ex4_TI", "URIDate": "2024-03-27" }, "r411": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "119", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_119_a&doctype=Standard", "URIDate": "2024-03-27" }, "r412": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "119", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_119_c&doctype=Standard", "URIDate": "2024-03-27" }, "r413": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "119", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_119_g&doctype=Standard", "URIDate": "2024-03-27" }, "r414": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "16", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16_a&doctype=Standard", "URIDate": "2024-03-27" }, "r415": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "16", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16_b&doctype=Standard", "URIDate": "2024-03-27" }, "r416": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17_b&doctype=Standard", "URIDate": "2024-03-27" }, "r417": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17_c&doctype=Standard", "URIDate": "2024-03-27" }, "r418": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "17", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17_d&doctype=Standard", "URIDate": "2024-03-27" }, "r419": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "20", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20&doctype=Standard", "URIDate": "2024-03-27" }, "r420": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "44C", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44C&doctype=Standard", "URIDate": "2024-03-27" }, "r421": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "44D", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_44D&doctype=Standard", "URIDate": "2024-03-27" }, "r422": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "50", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_50_a&doctype=Standard", "URIDate": "2024-03-27" }, "r423": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Section": "A Statement of cash flows for an entity other than a financial institution", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS07_IE_A_TI", "URIDate": "2024-03-27" }, "r424": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Section": "C Reconciliation of liabilities arising from financing activities", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&doctype=Illustrative%20Examples&dita_xref=IAS07_IE_C_TI", "URIDate": "2024-03-27" }, "r425": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "IG63", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2024-en-r&anchor=para_IG63&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r426": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "B10", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r427": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "94", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_94&doctype=Standard", "URIDate": "2024-03-27" }, "r428": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "B11", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_B11_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r429": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "B36", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_B36_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r430": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "B5", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_B5&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r431": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "B6", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_B6&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r432": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "IE60", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_IE60&doctype=Illustrative%20Examples", "URIDate": "2024-03-27" }, "r433": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "IE63", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_IE63&doctype=Illustrative%20Examples", "URIDate": "2024-03-27" }, "r434": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "15", "IssueDate": "2024-01-01", "Paragraph": "B89", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_B89_a&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r435": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "15", "IssueDate": "2024-01-01", "Paragraph": "B89", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_B89_b&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r436": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "15", "IssueDate": "2024-01-01", "Paragraph": "B89", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_B89_d&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r437": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "53", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard", "URIDate": "2024-03-27" }, "r438": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "113", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_113_b&doctype=Standard", "URIDate": "2024-03-27" }, "r439": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "96", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_96_a&doctype=Standard", "URIDate": "2024-03-27" }, "r440": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "96", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_96_b&doctype=Standard", "URIDate": "2024-03-27" }, "r441": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "17", "IssueDate": "2024-01-01", "Paragraph": "96", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_96_c&doctype=Standard", "URIDate": "2024-03-27" }, "r442": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "B64", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_B64&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r443": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "3", "IssueDate": "2024-01-01", "Paragraph": "IE72", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2024-en-r&anchor=para_IE72&doctype=Illustrative%20Examples", "URIDate": "2024-03-27" }, "r444": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "13C", "Subparagraph": "d", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_13C_d_i&doctype=Standard", "URIDate": "2024-03-27" }, "r445": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "32", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_32&doctype=Standard", "URIDate": "2024-03-27" }, "r446": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35H", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard", "URIDate": "2024-03-27" }, "r447": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35N", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35N&doctype=Standard", "URIDate": "2024-03-27" }, "r448": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "6", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_6&doctype=Standard", "URIDate": "2024-03-27" }, "r449": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B11", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B11_d&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r450": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B11", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B11&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r451": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B33", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B33&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r452": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B35", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B35_g&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r453": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "B35", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_B35&doctype=Appendix&subtype=B", "URIDate": "2024-03-27" }, "r454": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "IG20B", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_IG20B&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r455": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "IG31A", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r456": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "IG40B", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_IG40B&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r457": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "IG40D", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_IG40D&doctype=Implementation%20Guidance", "URIDate": "2024-03-27" }, "r458": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "23", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_23&doctype=Standard", "URIDate": "2024-03-27" }, "r459": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Name": "IFRS", "Number": "8", "IssueDate": "2024-01-01", "Paragraph": "28", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_b&doctype=Standard", "URIDate": "2024-03-27" }, "r460": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Note": "Expired 2023-01-01", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "108", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2017-en-b&anchor=para_108&doctype=Standard&forcepdf=true", "URIDate": "2024-03-27" }, "r461": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12" }, "r462": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "b" }, "r463": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "b-2" }, "r464": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "d1-1" }, "r465": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 10-K", "Number": "249", "Section": "310" }, "r466": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Number": "249", "Section": "220", "Subsection": "f" }, "r467": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16", "Subsection": "J", "Paragraph": "a" }, "r468": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K" }, "r469": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "b", "Paragraph": "1" }, "r470": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "b", "Paragraph": "1", "Subparagraph": "i" }, "r471": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "b", "Paragraph": "1", "Subparagraph": "ii" }, "r472": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "b", "Paragraph": "1", "Subparagraph": "iii" }, "r473": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "b", "Paragraph": "2" }, "r474": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "c", "Paragraph": "1" }, "r475": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "c", "Paragraph": "2" }, "r476": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "c", "Paragraph": "2", "Subparagraph": "i" }, "r477": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "c", "Paragraph": "2", "Subparagraph": "ii" }, "r478": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "16K", "Subsection": "c", "Paragraph": "2", "Subparagraph": "iii" }, "r479": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1" }, "r480": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i" }, "r481": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i", "Sentence": "A" }, "r482": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i", "Sentence": "B" }, "r483": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i", "Sentence": "C" }, "r484": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i", "Sentence": "D" }, "r485": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "i", "Sentence": "E" }, "r486": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "ii" }, "r487": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "1", "Subparagraph": "iii" }, "r488": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 20-F", "Section": "6", "Subsection": "F", "Paragraph": "2" }, "r489": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Number": "249", "Section": "240", "Subsection": "f" }, "r490": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a" }, "r491": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1" }, "r492": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1", "Sentence": "i" }, "r493": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1", "Sentence": "ii" }, "r494": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1", "Sentence": "iii" }, "r495": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1", "Sentence": "iv" }, "r496": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "1", "Sentence": "v" }, "r497": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "2" }, "r498": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "a", "Subparagraph": "3" }, "r499": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form 40-F", "Section": "19", "Paragraph": "b" }, "r500": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a" }, "r501": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1" }, "r502": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1", "Sentence": "i" }, "r503": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1", "Sentence": "ii" }, "r504": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1", "Sentence": "iii" }, "r505": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1", "Sentence": "iv" }, "r506": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "1", "Sentence": "v" }, "r507": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "2" }, "r508": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "a", "Subparagraph": "3" }, "r509": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-CSR", "Section": "18", "Paragraph": "b" }, "r510": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Section": "13", "Subsection": "a-1" }, "r511": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v" }, "r512": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "1" }, "r513": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "ii" }, "r514": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii" }, "r515": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "B", "Clause": "1", "Subclause": "ii" }, "r516": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "i" }, "r517": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "ii" }, "r518": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "iii" }, "r519": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "iv" }, "r520": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "v" }, "r521": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1", "Subclause": "vi" }, "r522": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iv" }, "r523": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "vi" }, "r524": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "3" }, "r525": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "4" }, "r526": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "5", "Subparagraph": "i" }, "r527": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "5", "Subparagraph": "ii" }, "r528": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "5", "Subparagraph": "iii" }, "r529": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "5", "Subparagraph": "iv" }, "r530": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "6" }, "r531": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "v", "Paragraph": "6", "Subparagraph": "i" }, "r532": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w" }, "r533": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1" }, "r534": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i" }, "r535": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i", "Sentence": "A" }, "r536": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i", "Sentence": "B" }, "r537": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i", "Sentence": "C" }, "r538": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i", "Sentence": "D" }, "r539": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "i", "Sentence": "E" }, "r540": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "ii" }, "r541": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "1", "Subparagraph": "iii" }, "r542": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "w", "Paragraph": "2" }, "r543": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "1" }, "r544": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2" }, "r545": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "A" }, "r546": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "C" }, "r547": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "D" }, "r548": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "E" }, "r549": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "402", "Subsection": "x", "Paragraph": "2", "Subparagraph": "ii", "Sentence": "F" }, "r550": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a" }, "r551": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a", "Paragraph": "1" }, "r552": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a", "Paragraph": "2", "Subparagraph": "A" }, "r553": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a", "Paragraph": "2", "Subparagraph": "B" }, "r554": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a", "Paragraph": "2", "Subparagraph": "C" }, "r555": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "a", "Paragraph": "2", "Subparagraph": "D" }, "r556": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Number": "229", "Section": "408", "Subsection": "b", "Paragraph": "1" }, "r557": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106" }, "r558": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "b", "Paragraph": "1" }, "r559": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "b", "Paragraph": "1", "Subparagraph": "i" }, "r560": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "b", "Paragraph": "1", "Subparagraph": "ii" }, "r561": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "b", "Paragraph": "1", "Subparagraph": "iii" }, "r562": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "b", "Paragraph": "2" }, "r563": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "c", "Paragraph": "1" }, "r564": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "c", "Paragraph": "2" }, "r565": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "c", "Paragraph": "2", "Subparagraph": "i" }, "r566": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "c", "Paragraph": "2", "Subparagraph": "ii" }, "r567": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "106", "Subsection": "c", "Paragraph": "2", "Subparagraph": "iii" }, "r568": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "402", "Number": "229", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "C", "Clause": "1" }, "r569": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "A", "Number": "229" }, "r570": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "B", "Clause": "1", "Number": "229" }, "r571": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-K", "Section": "402", "Subsection": "v", "Paragraph": "2", "Subparagraph": "iii", "Sentence": "B", "Clause": "1", "Subclause": "i", "Number": "229" }, "r572": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-T", "Number": "232", "Section": "405" }, "r573": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Securities Act", "Number": "230", "Section": "405" }, "r574": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "10", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_10_e&doctype=Standard", "URIDate": "2024-03-27" }, "r575": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "104", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_104&doctype=Standard", "URIDate": "2024-03-27" }, "r576": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "106", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard", "URIDate": "2024-03-27" }, "r577": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "108", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_108&doctype=Standard", "URIDate": "2024-03-27" }, "r578": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "112", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard", "URIDate": "2024-03-27" }, "r579": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "117", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_117&doctype=Standard", "URIDate": "2024-03-27" }, "r580": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_a&doctype=Standard", "URIDate": "2024-03-27" }, "r581": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "55", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard", "URIDate": "2024-03-27" }, "r582": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78_b&doctype=Standard", "URIDate": "2024-03-27" }, "r583": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "78", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78&doctype=Standard", "URIDate": "2024-03-27" }, "r584": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a&doctype=Standard", "URIDate": "2024-03-27" }, "r585": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "1", "IssueDate": "2024-01-01", "Paragraph": "85", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_85&doctype=Standard", "URIDate": "2024-03-27" }, "r586": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "80", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_80&doctype=Standard", "URIDate": "2024-03-27" }, "r587": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "c", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r588": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "g", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g_i&doctype=Standard", "URIDate": "2024-03-27" }, "r589": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "Subparagraph": "g", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_g&doctype=Standard", "URIDate": "2024-03-27" }, "r590": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "12", "IssueDate": "2024-01-01", "Paragraph": "81", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81&doctype=Standard", "URIDate": "2024-03-27" }, "r591": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "37", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard", "URIDate": "2024-03-27" }, "r592": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "d", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_d&doctype=Standard", "URIDate": "2024-03-27" }, "r593": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "16", "IssueDate": "2024-01-01", "Paragraph": "73", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard", "URIDate": "2024-03-27" }, "r594": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "135", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_135_b&doctype=Standard", "URIDate": "2024-03-27" }, "r595": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "138", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_138_b&doctype=Standard", "URIDate": "2024-03-27" }, "r596": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "141", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c&doctype=Standard", "URIDate": "2024-03-27" }, "r597": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "142", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142&doctype=Standard", "URIDate": "2024-03-27" }, "r598": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "144", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard", "URIDate": "2024-03-27" }, "r599": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "145", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_145&doctype=Standard", "URIDate": "2024-03-27" }, "r600": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "5", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_5&doctype=Standard", "URIDate": "2024-03-27" }, "r601": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "57", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard", "URIDate": "2024-03-27" }, "r602": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "8", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_8&doctype=Standard", "URIDate": "2024-03-27" }, "r603": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "19", "IssueDate": "2024-01-01", "Paragraph": "9", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_9&doctype=Standard", "URIDate": "2024-03-27" }, "r604": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "2", "IssueDate": "2024-01-01", "Paragraph": "37", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=2&code=ifrs-tx-2024-en-r&anchor=para_37&doctype=Standard", "URIDate": "2024-03-27" }, "r605": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "70", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_b&doctype=Standard", "URIDate": "2024-03-27" }, "r606": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "33", "IssueDate": "2024-01-01", "Paragraph": "70", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2024-en-r&anchor=para_70_c&doctype=Standard", "URIDate": "2024-03-27" }, "r607": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84_b&doctype=Standard", "URIDate": "2024-03-27" }, "r608": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "37", "IssueDate": "2024-01-01", "Paragraph": "84", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84&doctype=Standard", "URIDate": "2024-03-27" }, "r609": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_c&doctype=Standard", "URIDate": "2024-03-27" }, "r610": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "i", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_i&doctype=Standard", "URIDate": "2024-03-27" }, "r611": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "iv", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_iv&doctype=Standard", "URIDate": "2024-03-27" }, "r612": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "Clause": "vii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vii&doctype=Standard", "URIDate": "2024-03-27" }, "r613": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "Subparagraph": "e", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e&doctype=Standard", "URIDate": "2024-03-27" }, "r614": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "38", "IssueDate": "2024-01-01", "Paragraph": "118", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118&doctype=Standard", "URIDate": "2024-03-27" }, "r615": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "40", "IssueDate": "2024-01-01", "Paragraph": "79", "Subparagraph": "c", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=40&code=ifrs-tx-2024-en-r&anchor=para_79_c&doctype=Standard", "URIDate": "2024-03-27" }, "r616": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "41", "IssueDate": "2024-01-01", "Paragraph": "54", "Subparagraph": "f", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2024-en-r&anchor=para_54_f&doctype=Standard", "URIDate": "2024-03-27" }, "r617": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "16", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_16&doctype=Standard", "URIDate": "2024-03-27" }, "r618": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "17", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_17&doctype=Standard", "URIDate": "2024-03-27" }, "r619": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "20", "Subparagraph": "a", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20_a&doctype=Standard", "URIDate": "2024-03-27" }, "r620": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "20", "Subparagraph": "b", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20_b&doctype=Standard", "URIDate": "2024-03-27" }, "r621": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "20", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20&doctype=Standard", "URIDate": "2024-03-27" }, "r622": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "35", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35&doctype=Standard", "URIDate": "2024-03-27" }, "r623": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IAS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "45", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2024-en-r&anchor=para_45&doctype=Standard", "URIDate": "2024-03-27" }, "r624": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "h", "Clause": "ii", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_h_ii&doctype=Standard", "URIDate": "2024-03-27" }, "r625": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IFRS", "Number": "13", "IssueDate": "2024-01-01", "Paragraph": "93", "Subparagraph": "h", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2024-en-r&anchor=para_93_h&doctype=Standard", "URIDate": "2024-03-27" }, "r626": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "39", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_39&doctype=Standard", "URIDate": "2024-03-27" }, "r627": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "IFRS", "Number": "7", "IssueDate": "2024-01-01", "Paragraph": "7", "URI": "https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard", "URIDate": "2024-03-27" }, "r628": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "11", "Subsection": "03", "Publisher": "SEC" }, "r629": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12", "Paragraph": "Column A", "Subparagraph": "(ii)", "Footnote": "2", "Publisher": "SEC" }, "r630": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12A", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r631": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "12B", "Paragraph": "Column A", "Subparagraph": "(b)", "Footnote": "1", "Publisher": "SEC" }, "r632": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "12", "Subsection": "14", "Paragraph": "Column A", "Footnote": "2", "Publisher": "SEC" }, "r633": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "13", "Subsection": "01", "Paragraph": "a", "Subparagraph": "(4)(i)", "Publisher": "SEC" }, "r634": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "13", "Subsection": "01", "Paragraph": "a", "Subparagraph": "(4)(iv)", "Publisher": "SEC" }, "r635": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Name": "Regulation S-X (SX)", "Number": "210", "Section": "13", "Subsection": "02", "Paragraph": "a", "Subparagraph": "(4)(iv)", "Publisher": "SEC" } } }