{ "instance": { "cinf-2019630x10q.htm": { "axisCustom": 0, "axisStandard": 18, "contextCount": 429, "dts": { "calculationLink": { "local": [ "cinf-20190630_cal.xml" ] }, "definitionLink": { "local": [ "cinf-20190630_def.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-eedm-def-2018-01-31.xml", "http://xbrl.fasb.org/srt/2018/elts/srt-eedm1-def-2018-01-31.xml" ] }, "inline": { "local": [ "cinf-2019630x10q.htm" ] }, "labelLink": { "local": [ "cinf-20190630_lab.xml" ], "remote": [ "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-doc-2018-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-doc-2019-01-31.xml" ] }, "presentationLink": { "local": [ "cinf-20190630_pre.xml" ] }, "referenceLink": { "remote": [ "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-ref-2018-01-31.xml", "https://xbrl.sec.gov/dei/2019/dei-ref-2019-01-31.xml" ] }, "schema": { "local": [ "cinf-20190630.xsd" ], "remote": [ "http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd", "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/dtr/type/numeric-2009-12-16.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://xbrl.fasb.org/srt/2018/elts/srt-types-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd", "http://xbrl.fasb.org/srt/2018/elts/srt-roles-2018-01-31.xsd", "http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd", "http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/net-2009-12-16.xsd", "http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd", "https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd", "https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd", "http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd", "http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd", "http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd", "https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd", "http://www.xbrl.org/lrr/role/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "http://xbrl.fasb.org/us-gaap/2018/elts/us-parts-codification-2018-01-31.xsd" ] } }, "elementCount": 552, "entityCount": 1, "hidden": { "http://fasb.org/us-gaap/2018-01-31": 47, "http://www.cinfin.com/20190630": 14, "http://xbrl.sec.gov/dei/2019-01-31": 5, "total": 66 }, "keyCustom": 51, "keyStandard": 360, "memberCustom": 31, "memberStandard": 38, "nsprefix": "cinf", "nsuri": "http://www.cinfin.com/20190630", "report": { "R1": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "document", "isDefault": "true", "longName": "0001000 - Document - Cover", "role": "http://www.cinfin.com/role/Cover", "shortName": "Cover", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "dei:DocumentType", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R10": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2101100 - Disclosure - Accounting Policies", "role": "http://www.cinfin.com/role/AccountingPolicies", "shortName": "Accounting Policies", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SignificantAccountingPoliciesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R11": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2102100 - Disclosure - Investments", "role": "http://www.cinfin.com/role/Investments", "shortName": "Investments", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R12": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2103100 - Disclosure - Fair Value Measurements", "role": "http://www.cinfin.com/role/FairValueMeasurements", "shortName": "Fair Value Measurements", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R13": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2104100 - Disclosure - Property Casualty Loss and Loss Expenses", "role": "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpenses", "shortName": "Property Casualty Loss and Loss Expenses", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R14": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "cinf:LiabilityForFuturePolicyBenefitsLifeTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2105100 - Disclosure - Life Policy and Investment Contract Reserves", "role": "http://www.cinfin.com/role/LifePolicyAndInvestmentContractReserves", "shortName": "Life Policy and Investment Contract Reserves", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "cinf:LiabilityForFuturePolicyBenefitsLifeTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R15": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DeferredPolicyAcquisitionCostsTextBlock1", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2106100 - Disclosure - Deferred Acquisition Costs", "role": "http://www.cinfin.com/role/DeferredAcquisitionCosts", "shortName": "Deferred Acquisition Costs", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DeferredPolicyAcquisitionCostsTextBlock1", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R16": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2107100 - Disclosure - Accumulated Other Comprehensive Income", "role": "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncome", "shortName": "Accumulated Other Comprehensive Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ComprehensiveIncomeNoteTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R17": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ReinsuranceTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2108100 - Disclosure - Reinsurance", "role": "http://www.cinfin.com/role/Reinsurance", "shortName": "Reinsurance", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ReinsuranceTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R18": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2110100 - Disclosure - Income Taxes", "role": "http://www.cinfin.com/role/IncomeTaxes", "shortName": "Income Taxes", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:IncomeTaxDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R19": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2111100 - Disclosure - Net Income Per Common Share", "role": "http://www.cinfin.com/role/NetIncomePerCommonShare", "shortName": "Net Income Per Common Share", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:EarningsPerShareTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R2": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1001000 - Statement - Condensed Consolidated Balance Sheets", "role": "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "shortName": "Condensed Consolidated Balance Sheets", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "lang": null, "name": "us-gaap:OtherInvestments", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R20": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2112100 - Disclosure - Employee Retirement Benefits", "role": "http://www.cinfin.com/role/EmployeeRetirementBenefits", "shortName": "Employee Retirement Benefits", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R21": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2113100 - Disclosure - Commitments and Contingent Liabilities", "role": "http://www.cinfin.com/role/CommitmentsAndContingentLiabilities", "shortName": "Commitments and Contingent Liabilities", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:CommitmentsAndContingenciesDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R22": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2114100 - Disclosure - Segment Information", "role": "http://www.cinfin.com/role/SegmentInformation", "shortName": "Segment Information", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:SegmentReportingDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R23": { "firstAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BusinessCombinationDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2115100 - Disclosure - Acquisition", "role": "http://www.cinfin.com/role/Acquisition", "shortName": "Acquisition", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:BusinessCombinationDisclosureTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R24": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2201201 - Disclosure - Accounting Policies Pending Accounting Updates (Policies)", "role": "http://www.cinfin.com/role/AccountingPoliciesPendingAccountingUpdatesPolicies", "shortName": "Accounting Policies Pending Accounting Updates (Policies)", "subGroupType": "policies", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R25": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AvailableForSaleSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2302301 - Disclosure - Investments (Tables)", "role": "http://www.cinfin.com/role/InvestmentsTables", "shortName": "Investments (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:AvailableForSaleSecuritiesTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R26": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2303301 - Disclosure - Fair Value Measurements (Tables)", "role": "http://www.cinfin.com/role/FairValueMeasurementsTables", "shortName": "Fair Value Measurements (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R27": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2304301 - Disclosure - Property Casualty Loss and Loss Expenses (Tables)", "role": "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesTables", "shortName": "Property Casualty Loss and Loss Expenses (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R28": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2305301 - Disclosure - Life Policy and Investment Contract Reserves (Tables)", "role": "http://www.cinfin.com/role/LifePolicyAndInvestmentContractReservesTables", "shortName": "Life Policy and Investment Contract Reserves (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R29": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DeferredPolicyAcquisitionCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2306301 - Disclosure - Deferred Acquisition Costs (Tables)", "role": "http://www.cinfin.com/role/DeferredAcquisitionCostsTables", "shortName": "Deferred Acquisition Costs (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:DeferredPolicyAcquisitionCostsTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R3": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1001501 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)", "role": "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "shortName": "Condensed Consolidated Balance Sheets (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R30": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2307301 - Disclosure - Accumulated Other Comprehensive Income (Tables)", "role": "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeTables", "shortName": "Accumulated Other Comprehensive Income (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R31": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "cinf:PropertyCasualtyInsuranceAssumedAndCededBusinessTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2308301 - Disclosure - Reinsurance (Tables)", "role": "http://www.cinfin.com/role/ReinsuranceTables", "shortName": "Reinsurance (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "cinf:PropertyCasualtyInsuranceAssumedAndCededBusinessTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R32": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2310301 - Disclosure - Income Taxes (Tables)", "role": "http://www.cinfin.com/role/IncomeTaxesTables", "shortName": "Income Taxes (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R33": { "firstAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2311301 - Disclosure - Net Income Per Common Share (Tables)", "role": "http://www.cinfin.com/role/NetIncomePerCommonShareTables", "shortName": "Net Income Per Common Share (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R34": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2312301 - Disclosure - Employee Retirement Benefits (Tables)", "role": "http://www.cinfin.com/role/EmployeeRetirementBenefitsTables", "shortName": "Employee Retirement Benefits (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R35": { "firstAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2314301 - Disclosure - Segment Information (Tables)", "role": "http://www.cinfin.com/role/SegmentInformationTables", "shortName": "Segment Information (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R36": { "firstAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2315301 - Disclosure - Acquisition Acquisitions (Tables)", "role": "http://www.cinfin.com/role/AcquisitionAcquisitionsTables", "shortName": "Acquisition Acquisitions (Tables)", "subGroupType": "tables", "uniqueAnchor": { "ancestors": [ "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": null, "first": true, "lang": "en-US", "name": "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock", "reportCount": 1, "unique": true, "unitRef": null, "xsiNil": "false" } }, "R37": { "firstAnchor": { "ancestors": [ "span", "span", "div", "us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2401402 - Disclosure - Accounting Policies (Details)", "role": "http://www.cinfin.com/role/AccountingPoliciesDetails", "shortName": "Accounting Policies (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "us-gaap:NewAccountingPronouncementsPolicyPolicyTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:OperatingLeaseRightOfUseAsset", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R38": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:AvailableForSaleSecuritiesTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_invest_InvestmentSecuritiesClassAxis_us-gaap_DebtSecuritiesMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2402402 - Disclosure - Investments - Analysis of Cost or Amortized Cost, Gross Unrealized Gains and Losses and Fair Value for Investments (Detail)", "role": "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "shortName": "Investments - Analysis of Cost or Amortized Cost, Gross Unrealized Gains and Losses and Fair Value for Investments (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:AvailableForSaleSecuritiesTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_invest_InvestmentSecuritiesClassAxis_us-gaap_DebtSecuritiesMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R39": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_invest_InvestmentSecuritiesClassAxis_us-gaap_DebtSecuritiesMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2402403 - Disclosure - Investments - Fair Values and Unrealized Losses by Investment Category and by Duration of Securities' Continuous Unrealized Loss Position (Detail)", "role": "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail", "shortName": "Investments - Fair Values and Unrealized Losses by Investment Category and by Duration of Securities' Continuous Unrealized Loss Position (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_invest_InvestmentSecuritiesClassAxis_us-gaap_DebtSecuritiesMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R4": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:PremiumsEarnedNet", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1002000 - Statement - Condensed Consolidated Statements of Income", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "shortName": "Condensed Consolidated Statements of Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "lang": null, "name": "cinf:UnderwritingAcquisitionAndInsuranceExpenses", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R40": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2402404 - Disclosure - Investments - Schedule of Contractual Maturities of Investments (Details)", "role": "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails", "shortName": "Investments - Schedule of Contractual Maturities of Investments (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R41": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "cinf:ScheduleOfInvestmentIncomeRealizedGainLossComprehensiveIncomeLossTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:InvestmentIncomeInterest", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2402405 - Disclosure - Investments - Realized Investment Gains and Losses and Change in Unrealized Investment Gains and Losses and Other Items (Detail)", "role": "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail", "shortName": "Investments - Realized Investment Gains and Losses and Change in Unrealized Investment Gains and Losses and Other Items (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "cinf:ScheduleOfInvestmentIncomeRealizedGainLossComprehensiveIncomeLossTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:InvestmentIncomeInterest", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R42": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "cinf:LargestSingleCommonStockHolding", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2402406 - Disclosure - Investments - Additional Information (Detail)", "role": "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "shortName": "Investments - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "ix:continuation", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": "INF", "lang": null, "name": "cinf:FixedMaturityInvestmentsPercentageOfAmortizedCosts", "reportCount": 1, "unique": true, "unitRef": "number", "xsiNil": "false" } }, "R43": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AvailableForSaleSecuritiesDebtSecurities", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403402 - Disclosure - Fair Value Measurements - Fair Value Hierarchy for Assets Measured at Fair Value on Recurring Basis (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "shortName": "Fair Value Measurements - Fair Value Hierarchy for Assets Measured at Fair Value on Recurring Basis (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:FairValueAssetsMeasuredOnRecurringBasisTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "lang": null, "name": "us-gaap:OtherInvestmentNotReadilyMarketableFairValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R44": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2018Q4", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403403 - Disclosure - Fair Value Measurements - Change in Level 3 Assets (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "shortName": "Fair Value Measurements - Change in Level 3 Assets (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2018Q4", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R45": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LongTermDebt", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403404 - Disclosure - Fair Value Measurements - Summary of Book Value and Principal Amounts of Long-Term Debt (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail", "shortName": "Fair Value Measurements - Summary of Book Value and Principal Amounts of Long-Term Debt (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LongTermDebt", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R46": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:NotesPayableFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403405 - Disclosure - Fair Value Measurements - Fair Values of Note Payable and Long-Term Debt (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail", "shortName": "Fair Value Measurements - Fair Values of Note Payable and Long-Term Debt (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:NotesPayableFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R47": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LoansReceivableFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403406 - Disclosure - Fair Value Measurements - Fair Value of Life Policy Loans, Deferred Annuities, and Structured Settlements (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "shortName": "Fair Value Measurements - Fair Value of Life Policy Loans, Deferred Annuities, and Structured Settlements (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LoansReceivableFairValueDisclosure", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R48": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LoansAndLeasesReceivableNetReportedAmount", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2403407 - Disclosure - Fair Value Measurements - Additional Information (Detail)", "role": "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "shortName": "Fair Value Measurements - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_us-gaap_InvestmentTypeAxis_cinf_DeferredAnnuitiesMember", "decimals": "-6", "lang": null, "name": "us-gaap:LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R49": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q1", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404402 - Disclosure - Property Casualty Loss and Loss Expenses - Consolidated Property Casualty Loss and Loss Expense Reserves (Detail)", "role": "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail", "shortName": "Property Casualty Loss and Loss Expenses - Consolidated Property Casualty Loss and Loss Expense Reserves (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q1", "decimals": "-6", "lang": null, "name": "us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R5": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1003000 - Statement - Condensed Consolidated Statements of Comprehensive Income", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "shortName": "Condensed Consolidated Statements of Comprehensive Income", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "lang": null, "name": "us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R50": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2404403 - Disclosure - Property Casualty Loss and Loss Expenses - Additional Information (Detail)", "role": "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "shortName": "Property Casualty Loss and Loss Expenses - Additional Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD_us-gaap_StatementBusinessSegmentsAxis_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember", "decimals": "-6", "lang": null, "name": "us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R51": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:LiabilityForFuturePolicyBenefitsLife", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2405402 - Disclosure - Reserves in Addition to Account Balance, Based on Expected No-Lapse Guarantee Benefits and Expected Policy Assessments (Detail)", "role": "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail", "shortName": "Reserves in Addition to Account Balance, Based on Expected No-Lapse Guarantee Benefits and Expected Policy Assessments (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2_us-gaap_EquitySecuritiesByIndustryAxis_cinf_LifePolicyReservesMember", "decimals": "-6", "lang": null, "name": "us-gaap:LiabilityForFuturePolicyBenefitsLife", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R52": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q1", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DeferredPolicyAcquisitionCosts", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2406402 - Disclosure - Deferred Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail)", "role": "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail", "shortName": "Deferred Acquisition Costs - Deferred Policy Acquisition Costs and Asset Reconciliation (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q1", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DeferredPolicyAcquisitionCosts", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R53": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2407402 - Disclosure - Accumulated Other Comprehensive Income (Details)", "role": "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "shortName": "Accumulated Other Comprehensive Income (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q1_us-gaap_StatementEquityComponentsAxis_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember", "decimals": "-6", "lang": null, "name": "us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R54": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:PolicyholderBenefitsAndClaimsIncurredNet", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2408402 - Disclosure - Reinsurance - Consolidated Property Casualty Insurance Assumed and Ceded Business (Details)", "role": "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "shortName": "Reinsurance - Consolidated Property Casualty Insurance Assumed and Ceded Business (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "cinf:PropertyCasualtyInsuranceAssumedAndCededBusinessTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD_us-gaap_StatementBusinessSegmentsAxis_srt_ConsolidatedPropertyAndCasualtyInsuranceEntityMember", "decimals": "-6", "lang": null, "name": "us-gaap:DirectPremiumsWritten", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R55": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:PolicyholderBenefitsAndClaimsIncurredNet", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2408403 - Disclosure - Reinsurance - Life Insurance Ceded Business (Detail)", "role": "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail", "shortName": "Reinsurance - Life Insurance Ceded Business (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "cinf:LifeInsuranceAssumedAndCededBusinessTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD_us-gaap_StatementBusinessSegmentsAxis_us-gaap_LifeInsuranceSegmentMember", "decimals": "-6", "lang": null, "name": "us-gaap:DirectPremiumsEarned", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R56": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2410402 - Disclosure - Income Taxes - Differences Between Statutory Income Tax Rate and Effective Income Tax Rate (Detail)", "role": "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail", "shortName": "Income Taxes - Differences Between Statutory Income Tax Rate and Effective Income Tax Rate (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R57": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "INF", "first": true, "lang": null, "name": "us-gaap:EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "reportCount": 1, "unitRef": "number", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2410403 - Disclosure - Income Taxes (Narrative) (Details)", "role": "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails", "shortName": "Income Taxes (Narrative) (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "I2019Q1Feb28_us-gaap_BusinessAcquisitionAxis_cinf_MSPUnderwritingLimitedMember", "decimals": "-6", "lang": null, "name": "us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R58": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2411402 - Disclosure - Net Income Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Detail)", "role": "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail", "shortName": "Net Income Per Common Share - Calculations for Basic and Diluted Earnings Per Share (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-5", "lang": null, "name": "us-gaap:WeightedAverageNumberOfSharesOutstandingBasic", "reportCount": 1, "unique": true, "unitRef": "shares", "xsiNil": "false" } }, "R59": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD_us-gaap_RetirementPlanTypeAxis_us-gaap_PensionPlansDefinedBenefitMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2412402 - Disclosure - Employee Retirement Benefits - Components of Net Periodic Costs for Qualified and Supplemental Pension Plans (Detail)", "role": "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "shortName": "Employee Retirement Benefits - Components of Net Periodic Costs for Qualified and Supplemental Pension Plans (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD_us-gaap_RetirementPlanTypeAxis_us-gaap_PensionPlansDefinedBenefitMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DefinedBenefitPlanServiceCost", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R6": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1003001 - Statement - Condensed Consolidated Statements of Comprehensive Income (Parenthetical)", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical", "shortName": "Condensed Consolidated Statements of Comprehensive Income (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R60": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2412403 - Disclosure - Employee Retirement Benefits - Defined Contribution Plan (Detail)", "role": "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail", "shortName": "Employee Retirement Benefits - Defined Contribution Plan (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2QTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:DefinedContributionPlanEmployerDiscretionaryContributionAmount", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R61": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2019Q2", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:Assets", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2414402 - Disclosure - Segment Information (Detail)", "role": "http://www.cinfin.com/role/SegmentInformationDetail", "shortName": "Segment Information (Detail)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "us-gaap:ScheduleOfSegmentReportingInformationBySegmentTextBlock", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2018Q4_us-gaap_StatementBusinessSegmentsAxis_srt_ConsolidatedPropertyAndCasualtyInsuranceEntityMember", "decimals": "-6", "lang": null, "name": "us-gaap:Assets", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R62": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": "INF", "first": true, "lang": null, "name": "cinf:NumberOfIndustriesOperatingIn", "reportCount": 1, "unique": true, "unitRef": "industry", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2414403 - Disclosure - Segment Information - Narrative (Details)", "role": "http://www.cinfin.com/role/SegmentInformationNarrativeDetails", "shortName": "Segment Information - Narrative (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": "INF", "first": true, "lang": null, "name": "cinf:NumberOfIndustriesOperatingIn", "reportCount": 1, "unique": true, "unitRef": "industry", "xsiNil": "false" } }, "R63": { "firstAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "D2019Q1Feb28-28_us-gaap_BusinessAcquisitionAxis_cinf_MSPUnderwritingLimitedMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:PaymentsToAcquireBusinessesGross", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2415402 - Disclosure - Acquisition - Narrative (Details)", "role": "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "shortName": "Acquisition - Narrative (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "D2019Q1Feb28-28_us-gaap_BusinessAcquisitionAxis_cinf_MSPUnderwritingLimitedMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:PaymentsToAcquireBusinessesGross", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R64": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "I2019Q1Feb28_us-gaap_BusinessAcquisitionAxis_cinf_MSPUnderwritingLimitedMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "disclosure", "isDefault": "false", "longName": "2415403 - Disclosure - Acquisition - Schedule of Assets and Liabilities Acquired (Details)", "role": "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "shortName": "Acquisition - Schedule of Assets and Liabilities Acquired (Details)", "subGroupType": "details", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "us-gaap:ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "I2019Q1Feb28_us-gaap_BusinessAcquisitionAxis_cinf_MSPUnderwritingLimitedMember", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R7": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2017Q4_us-gaap_StatementEquityComponentsAxis_us-gaap_RetainedEarningsMember", "decimals": "-6", "first": true, "lang": null, "name": "cinf:UnrealizedgainsreclassifiedtoretainedearningsforASU201601aftertax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1004000 - Statement - Condensed Consolidated Statements of Shareholders' Equity", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity", "shortName": "Condensed Consolidated Statements of Shareholders' Equity", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FI2017Q4_us-gaap_StatementEquityComponentsAxis_us-gaap_RetainedEarningsMember", "decimals": "-6", "first": true, "lang": null, "name": "cinf:UnrealizedgainsreclassifiedtoretainedearningsforASU201601aftertax", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } }, "R8": { "firstAnchor": null, "groupType": "statement", "isDefault": "false", "longName": "1004501 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Parenthetical)", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquityParenthetical", "shortName": "Condensed Consolidated Statements of Shareholders' Equity (Parenthetical)", "subGroupType": "parenthetical", "uniqueAnchor": null }, "R9": { "firstAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "ix:continuation", "ix:continuation", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": "-6", "first": true, "lang": null, "name": "us-gaap:NetIncomeLoss", "reportCount": 1, "unitRef": "usd", "xsiNil": "false" }, "groupType": "statement", "isDefault": "false", "longName": "1005000 - Statement - Condensed Consolidated Statements of Cash Flows", "role": "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "shortName": "Condensed Consolidated Statements of Cash Flows", "subGroupType": "", "uniqueAnchor": { "ancestors": [ "span", "span", "div", "td", "tr", "table", "div", "div", "body", "html" ], "baseRef": "cinf-2019630x10q.htm", "contextRef": "FD2019Q2YTD", "decimals": "-6", "lang": null, "name": "us-gaap:DepreciationAmortizationAndAccretionNet", "reportCount": 1, "unique": true, "unitRef": "usd", "xsiNil": "false" } } }, "segmentCount": 73, "tag": { "cinf_AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOtherMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Accumulated Net Unrealized Gain (Loss) on Deferred Costs, Reserves And Other [Member]", "label": "Accumulated Net Unrealized Gain (Loss) on Deferred Costs, Reserves And Other [Member]", "terseLabel": "Accumulated Net Unrealized Gain (Loss) on Deferred Costs, Reserves And Other" } } }, "localname": "AccumulatedNetUnrealizedGainLossOnDeferredCostsReservesAndOtherMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "cinf_AccumulatedOtherComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Accumulated Other Comprehensive Income [Abstract]", "label": "Accumulated Other Comprehensive Income [Abstract]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeAbstract", "nsuri": "http://www.cinfin.com/20190630", "xbrltype": "stringItemType" }, "cinf_AccumulatedOtherComprehensiveIncomeLossTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Accumulated Other Comprehensive Income (Loss), Tax", "label": "Accumulated Other Comprehensive Income Loss Tax", "periodEndLabel": "Accumulated other comprehensive income, tax, end of period", "periodStartLabel": "Accumulated other comprehensive income, tax, beginning of period" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_AccumulatedOtherComprehensiveIncomeLossTaxAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Accumulated Other Comprehensive Income (Loss), Tax [Abstract]", "label": "Accumulated Other Comprehensive Income Loss Tax [Abstract]", "terseLabel": "Accumulated Other Comprehensive Income (Loss), Tax [Abstract]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossTaxAbstract", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "cinf_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAverage": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 3.0, "parentTag": "cinf_AvailableForSaleSecuritiesDebtMaturitiesAverage", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Available For Sale Securities Debt Maturities After Five Through Ten Years Average", "label": "Available For Sale Securities Debt Maturities After Five Through Ten Years Average", "terseLabel": "Due after five years through ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAverage", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "percentItemType" }, "cinf_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAverage": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 2.0, "parentTag": "cinf_AvailableForSaleSecuritiesDebtMaturitiesAverage", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Available For Sale Securities Debt Maturities After One Through Five Years Average", "label": "Available For Sale Securities Debt Maturities After One Through Five Years Average", "terseLabel": "Due after one year through five years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAverage", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "percentItemType" }, "cinf_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAverage": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 4.0, "parentTag": "cinf_AvailableForSaleSecuritiesDebtMaturitiesAverage", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Available For Sale Securities Debt Maturities After Ten Years Average", "label": "Available For Sale Securities Debt Maturities After Ten Years Average", "terseLabel": "Due after ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAverage", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "percentItemType" }, "cinf_AvailableForSaleSecuritiesDebtMaturitiesAverage": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "Available For Sale Securities Debt Maturities Average", "label": "Available For Sale Securities Debt Maturities Average", "totalLabel": "Total" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAverage", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "percentItemType" }, "cinf_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAverage": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 1.0, "parentTag": "cinf_AvailableForSaleSecuritiesDebtMaturitiesAverage", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Available For Sale Securities Debt Maturities Within One Year Average", "label": "Available For Sale Securities Debt Maturities Within One Year Average", "terseLabel": "Due in one year or less" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAverage", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "percentItemType" }, "cinf_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss3": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": 2.0, "parentTag": "cinf_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss 3", "negatedLabel": "Unrealized losses 12 months or more (equity investment less than $500,000)", "terseLabel": "12 months or more Unrealized Losses" } } }, "localname": "AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLoss3", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "cinf_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of unrealized loss on securities classified as available-for-sale.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss 3", "totalLabel": "Total Unrealized Losses" } } }, "localname": "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "cinf_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss3": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": 1.0, "parentTag": "cinf_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLoss3", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than 12 Months Aggregate Loss 3", "terseLabel": "Less than 12 months Unrealized Losses" } } }, "localname": "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLoss3", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "cinf_AvailableforsaleSecuritiesDebtMaturitiesAveragePercentAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Available-for-sale Securities, Debt Maturities, Average, Percent [Abstract]", "label": "Available-for-sale Securities, Debt Maturities, Average, Percent [Abstract]", "terseLabel": "% of fair value" } } }, "localname": "AvailableforsaleSecuritiesDebtMaturitiesAveragePercentAbstract", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "stringItemType" }, "cinf_BrokerRelationshipsAndInternallyDevelopedTechnologyMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Broker Relationships And Internally Developed Technology [Member]", "label": "Broker Relationships And Internally Developed Technology [Member]", "terseLabel": "Broker Relationships And Internally Developed Technology" } } }, "localname": "BrokerRelationshipsAndInternallyDevelopedTechnologyMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails" ], "xbrltype": "domainItemType" }, "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReinsuranceRecoverable": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 4.0, "parentTag": "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Reinsurance Recoverable", "label": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Assets, Reinsurance Recoverable", "terseLabel": "Reinsurance recoverable" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReinsuranceRecoverable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLossAndLossExpenseReserves": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 1.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Loss And Loss Expense Reserves", "label": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Loss And Loss Expense Reserves", "terseLabel": "Loss and loss expense reserves" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLossAndLossExpenseReserves", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesUnearnedPremiums": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 2.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Unearned Premiums", "label": "Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Unearned Premiums", "terseLabel": "Unearned premiums" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesUnearnedPremiums", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Excluding Intangible Assets", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Excluding Intangible Assets", "totalLabel": "Total assets acquired" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedValuationAllowance": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Valuation Allowance", "label": "Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Valuation Allowance", "terseLabel": "Valuation allowance" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedValuationAllowance", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_CatastropheDevelopmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Catastrophe Development Member.", "label": "Catastrophe Development [Member]", "terseLabel": "Catastrophe Development" } } }, "localname": "CatastropheDevelopmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_ChangeInAccumulatedOtherComprehensiveIncomeRollForward": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Change In Accumulated Other Comprehensive Income [Roll Forward]", "label": "Change In Accumulated Other Comprehensive Income [Roll Forward]", "terseLabel": "Change In Accumulated Other Comprehensive Income [Roll Forward]" } } }, "localname": "ChangeInAccumulatedOtherComprehensiveIncomeRollForward", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "cinf_CommercialAutoSegmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commercial Auto Segment [Member]", "label": "Commercial Auto Segment [Member]", "terseLabel": "Commercial Auto" } } }, "localname": "CommercialAutoSegmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_CommercialCasualtySegmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commercial Casualty Segment [Member]", "label": "Commercial Casualty Segment [Member]", "terseLabel": "Commercial Casualty Segment", "verboseLabel": "Commercial Casualty" } } }, "localname": "CommercialCasualtySegmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_CommercialPropertySegmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Commercial Property Segment [Member]", "label": "Commercial Property Segment [Member]", "terseLabel": "Commercial Property Segment", "verboseLabel": "Commercial Property" } } }, "localname": "CommercialPropertySegmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Cumulative Effect of New Accounting Principle in Period of Adoption, Tax", "label": "Cumulative Effect of New Accounting Principle in Period of Adoption, Tax", "terseLabel": "Cumulative effect of change in accounting for equity securities, tax" } } }, "localname": "CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionbeforeTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Cumulative Effect of New Accounting Principle in Period of Adoption, before Tax", "label": "Cumulative Effect of New Accounting Principle in Period of Adoption, before Tax", "terseLabel": "Cumulative effect of change in accounting for equity securities, before tax" } } }, "localname": "CumulativeEffectofNewAccountingPrincipleinPeriodofAdoptionbeforeTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_DebtInstrumentIssuanceYear": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Debt instrument issuance year.", "label": "Debt Instrument Issuance Year", "terseLabel": "Debt issuance year" } } }, "localname": "DebtInstrumentIssuanceYear", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "cinf_DeferredAnnuitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Deferred Annuities [Member]", "label": "Deferred Annuities [Member]", "terseLabel": "Deferred annuities" } } }, "localname": "DeferredAnnuitiesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_DefinedBenefitPlanNonServiceCostBenefit": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 2.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Defined Benefit Plan, Non-Service Cost (Benefit)", "label": "Defined Benefit Plan, Non-Service Cost (Benefit)", "totalLabel": "Total non-service benefit" } } }, "localname": "DefinedBenefitPlanNonServiceCostBenefit", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "cinf_ExcessandSurplusLinesInsuranceMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Excess and Surplus Lines Insurance [Member]", "label": "Excess and Surplus Lines Insurance [Member]", "terseLabel": "Excess and Surplus Lines Insurance" } } }, "localname": "ExcessandSurplusLinesInsuranceMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair Value, Assets and Liabilities Measured on Recurring Basis [Table]", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis [Table]", "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring Basis [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "stringItemType" }, "cinf_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByMajorTypeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, by Major Type [Axis]", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Major Type [Axis]", "terseLabel": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Major Type [Axis]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByMajorTypeAxis", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "stringItemType" }, "cinf_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByMajorTypesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, by Major Types [Domain]", "label": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Major Types [Domain]", "verboseLabel": "Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Major Types [Domain]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByMajorTypesDomain", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "domainItemType" }, "cinf_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsTotalGainsLossesRealizedAndUnrealizedAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Assets, Total Gains (Losses) Realized and Unrealized [Abstract]", "label": "Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets Total Gains Losses Realized And Unrealized [Abstract]", "terseLabel": "Total gains or losses (realized/unrealized):" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsTotalGainsLossesRealizedAndUnrealizedAbstract", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "stringItemType" }, "cinf_FixedMaturityInvestmentsPercentageOfAmortizedCosts": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Fixed maturity investments, Percentage of amortized costs.", "label": "Fixed maturity investments, Percentage of amortized costs", "terseLabel": "Fixed maturity investments, Percentage of amortized costs" } } }, "localname": "FixedMaturityInvestmentsPercentageOfAmortizedCosts", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "cinf_HomeOwnerSegmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Home Owner Segment [Member]", "label": "Home Owner Segment [Member]", "terseLabel": "Home Owner Segment" } } }, "localname": "HomeOwnerSegmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_HomeownerMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Homeowner [Member].", "label": "Homeowner [Member]", "terseLabel": "Homeowner" } } }, "localname": "HomeownerMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_IncreaseDecreaseInOtherComprehensiveIncomeLossBeforeTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "cinf_IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Increase (Decrease) in Other Comprehensive Income (Loss), before Tax", "label": "Increase (Decrease) in Other Comprehensive Income (Loss), before Tax", "terseLabel": "Effect on other comprehensive income, before tax" } } }, "localname": "IncreaseDecreaseInOtherComprehensiveIncomeLossBeforeTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Increase (Decrease) in Other Comprehensive Income (Loss), Net of Tax", "label": "Increase (Decrease) in Other Comprehensive Income (Loss), Net of Tax", "totalLabel": "Effect on other comprehensive income, net of tax" } } }, "localname": "IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_IncreaseDecreaseInOtherComprehensiveIncomeLossTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "cinf_IncreaseDecreaseInOtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Increase (Decrease) in Other Comprehensive Income (Loss), Tax", "label": "Increase (Decrease) in Other Comprehensive Income (Loss), Tax", "terseLabel": "Effect on other comprehensive income, tax" } } }, "localname": "IncreaseDecreaseInOtherComprehensiveIncomeLossTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_IndividualOrdinaryLifeInsuranceMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Individual Ordinary Life Insurance [Member]", "label": "Individual Ordinary Life Insurance [Member]", "terseLabel": "Ordinary/traditional life" } } }, "localname": "IndividualOrdinaryLifeInsuranceMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_InvestmentIncomeOtherLongTermInvestments": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": 1.0, "parentTag": "us-gaap_GrossInvestmentIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Income derived from those other than interest and dividends.", "label": "Investment Income Other Long-Term Investments", "verboseLabel": "Other" } } }, "localname": "InvestmentIncomeOtherLongTermInvestments", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "cinf_InvestmentcontractreservesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Investment contract reserves [Member]", "label": "Investment contract reserves [Member]", "terseLabel": "Investment contract reserves:" } } }, "localname": "InvestmentcontractreservesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_InvestmentsUnrealizedLossPositionLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Investments, Unrealized Loss Position [Line Items]", "label": "Investments Unrealized Loss Position [Line Items]", "terseLabel": "Investments, Unrealized Loss Position" } } }, "localname": "InvestmentsUnrealizedLossPositionLineItems", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "stringItemType" }, "cinf_InvestmentsUnrealizedLossPositionTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Investments, Unrealized Loss Position [Table]", "label": "Investments Unrealized Loss Position [Table]", "terseLabel": "Investments, Unrealized Loss Position [Table]" } } }, "localname": "InvestmentsUnrealizedLossPositionTable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "stringItemType" }, "cinf_LargestSingleCommonStockHolding": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Largest Single Common Stock Holding", "label": "Largest Single Common Stock Holding", "terseLabel": "Largest Single Common Stock Holding" } } }, "localname": "LargestSingleCommonStockHolding", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "cinf_Largestequityholdingstototalequityportfolio": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "largest equity holdings to total equity portfolio", "label": "largest equity holdings to total equity portfolio", "terseLabel": "Largest equity holdings to total equity portfolio" } } }, "localname": "Largestequityholdingstototalequityportfolio", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "cinf_Largestequityholdingstototalportfolio": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Largest equity holdings to total portfolio", "label": "Largest equity holdings to total portfolio", "terseLabel": "Largest equity holdings to total portfolio" } } }, "localname": "Largestequityholdingstototalportfolio", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "cinf_LiabilityForFuturePolicyBenefitsLifeTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The disclosure of the sum of the known and estimated amounts payable as of the balance sheet date to life insurance policyholders that relates to insured events which can be viewed as either (a) the present value of future benefits to be paid to or on behalf of policyholders and expenses less the present value of future net premiums payable under the insurance contracts or (b) the accumulated amount of net premiums already collected less the accumulated amount of benefits and expenses already paid to or on behalf of policyholders.", "label": "Liability For Future Policy Benefits Life [Text Block]", "terseLabel": "Life Policy And Investment Contract Reserves" } } }, "localname": "LiabilityForFuturePolicyBenefitsLifeTextBlock", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/LifePolicyAndInvestmentContractReserves" ], "xbrltype": "textBlockItemType" }, "cinf_LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetRelatedToAcquisition": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Liability for Unpaid Claims and Claims Adjustment Expense, Net Related To Acquisition", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Net Related To Acquisition", "terseLabel": "Net loss and loss expense reserves related to acquisition of MSP at February 28, 2019" } } }, "localname": "LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetRelatedToAcquisition", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "cinf_LifeInsuranceAssumedAndCededBusinessTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Life Insurance Assumed And Ceded Business Table [Text Block]", "label": "Life Insurance Assumed And Ceded Business Table [Text Block]", "terseLabel": "Life Insurance Assumed and Ceded Business" } } }, "localname": "LifeInsuranceAssumedAndCededBusinessTableTextBlock", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReinsuranceTables" ], "xbrltype": "textBlockItemType" }, "cinf_LifePolicyReservesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Life Policy Reserves [Member]", "label": "Life Policy Reserves [Member]", "terseLabel": "Life policy reserves:" } } }, "localname": "LifePolicyReservesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_LifeandHealthLossReservesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Life and Health Loss Reserves [Member]", "label": "Life and Health Loss Reserves [Member]", "terseLabel": "Life and Health Loss Reserves" } } }, "localname": "LifeandHealthLossReservesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_MSPUnderwritingLimitedMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "MSP Underwriting Limited [Member]", "label": "MSP Underwriting Limited [Member]", "terseLabel": "Cincinnati Global" } } }, "localname": "MSPUnderwritingLimitedMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "domainItemType" }, "cinf_NumberOfIndustriesOperatingIn": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of Industries Operating In", "label": "Number of Industries Operating In", "terseLabel": "Number of Industries Operating In" } } }, "localname": "NumberOfIndustriesOperatingIn", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/SegmentInformationNarrativeDetails" ], "xbrltype": "integerItemType" }, "cinf_NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months", "label": "Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months", "terseLabel": "Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months" } } }, "localname": "NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "integerItemType" }, "cinf_NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonthsandBelow70PercentofAmortizedCost": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of Securities Continuous Unrealized Loss Position More Than Twelve Months and Below 70 Percent of Amortized Cost", "label": "Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months and Below 70 Percent of Amortized Cost", "terseLabel": "Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months and Below 70 Percent of Amortized Cost" } } }, "localname": "NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonthsandBelow70PercentofAmortizedCost", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "integerItemType" }, "cinf_NumberOfSecuritiesOtherThanTemporaryImpairmentLosses1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number Of Securities Other Than Temporary Impairment Losses", "label": "Number Of Securities Other Than Temporary Impairment Losses1", "terseLabel": "Number Of Securities Other Than Temporary Impairment Losses1" } } }, "localname": "NumberOfSecuritiesOtherThanTemporaryImpairmentLosses1", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "integerItemType" }, "cinf_OtherCommercialLinesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Commercial Lines [Member]", "label": "Other Commercial Lines [Member]", "terseLabel": "Other Commercial Lines", "verboseLabel": "Other Commercial Lines" } } }, "localname": "OtherCommercialLinesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_OtherComprehensiveIncomeChangeInLifeDeferredAcquisitionCostsLifePolicyReservesAndOtherTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income, Change in Life Deferred Acquisition Costs, Life Policy Reserves and Other, Tax", "label": "Other Comprehensive Income, Change in Life Deferred Acquisition Costs, Life Policy Reserves and Other, Tax", "terseLabel": "Other Comprehensive Income, Change in Life Deferred Acquisition Costs, Life Policy Reserves and Other, Tax" } } }, "localname": "OtherComprehensiveIncomeChangeInLifeDeferredAcquisitionCostsLifePolicyReservesAndOtherTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeChangeInLifeDeferredAcquistionCostsLifePolicyReservesAndOtherNetOfTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": 3.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income, Change in Life Deferred Acquistion Costs, Life Policy Reserves and Other, Net of Tax", "label": "Other Comprehensive Income, Change in Life Deferred Acquistion Costs, Life Policy Reserves and Other, Net of Tax", "negatedTerseLabel": "Change in life deferred acquisition costs, life policy reserves and other, net of tax (benefit) of ($1), $1, ($2) and $2, respectively" } } }, "localname": "OtherComprehensiveIncomeChangeInLifeDeferredAcquistionCostsLifePolicyReservesAndOtherNetOfTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentBeforeTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "cinf_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, before Tax", "label": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, before Tax", "terseLabel": "Change in unrealized gains, net, on investments available for sale, before tax" } } }, "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentBeforeTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, Net of Tax", "label": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, Net of Tax", "totalLabel": "Change in unrealized gains, net, on investments available for sale, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "cinf_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, Tax", "label": "Other Comprehensive Income (Loss), Available-for-sale Securities and Other Assets Adjustment, Tax", "terseLabel": "Change in unrealized gains, net, on investments available for sale, tax" } } }, "localname": "OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAndOtherAssetsAdjustmentTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentBeforeTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "cinf_OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, before Tax", "label": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, before Tax", "terseLabel": "Change in life deferred acquisition costs, life policy reserves and other, before tax" } } }, "localname": "OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentBeforeTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, Net of Tax", "label": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, Net of Tax", "totalLabel": "Change in life deferred acquisition costs, life policy reserves and other, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "cinf_OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, Tax", "label": "Other Comprehensive Income (Loss), Deferred Acquisition Costs, Life Policy Reserves and Other Adjustment, Tax", "terseLabel": "Change in life deferred acquisition costs, life policy reserves and other, tax" } } }, "localname": "OtherComprehensiveIncomeLossDeferredAcquisitionCostsLifePolicyReservesAndOtherAdjustmentTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialLossAndPriorServiceCostArisingDuringPeriodTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Other Comprehensive Income Loss, Pension And Other Postretirement Benefit Plans, Net Actuarial Loss And Prior Service Cost Arising During Period, Tax", "label": "Other Comprehensive Income Loss, Pension And Other Postretirement Benefit Plans, Net Actuarial Loss And Prior Service Cost Arising During Period, Tax", "terseLabel": "Other Comprehensive Income Loss, Pension And Other Postretirement Benefit Plans, Net Actuarial Loss And Prior Service Cost Arising During Period, Tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetActuarialLossAndPriorServiceCostArisingDuringPeriodTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "cinf_OtherInvestmentContractReservesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Investment Contract Reserves [Member]", "label": "Other Investment Contract Reserves [Member]", "terseLabel": "Other" } } }, "localname": "OtherInvestmentContractReservesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_OtherLifePolicyReservesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Life Policy Reserves [Member]", "label": "Other Life Policy Reserves [Member]", "terseLabel": "Other" } } }, "localname": "OtherLifePolicyReservesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "cinf_OtherPersonalLinesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Other Personal Lines [Member]", "label": "Other Personal Lines [Member]", "terseLabel": "Other Personal Lines" } } }, "localname": "OtherPersonalLinesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_OtherRealizedInvestmentGainsLossesNet": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents realized investment gains (losses) included in earnings for the period excluding those relating to other than temporary impairment losses on investments in debt securities. Includes realized investment gains and losses generated from the sale of debt securities, equity securities, investments in joint ventures and limited partnerships and from other than temporary impairments on investments other than debt securities. Also includes realized investment gains and losses are generated from prepayment premiums, recoveries of principal on previously impaired securities, provisions for losses on commercial mortgage and other loans, and fair value changes on embedded derivatives and derivatives that do not qualify for hedge accounting treatment, except those derivatives used in the Company's capacity as a broker or dealer.", "label": "Other Realized Investment Gains Losses Net", "terseLabel": "Other" } } }, "localname": "OtherRealizedInvestmentGainsLossesNet", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "cinf_PercentageOfLevel3AssetsToTotalFinancialInstrumentsMeasuredAtFairValue": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Percentage of Level 3 Assets to Total Financial Instruments Measured At Fair Value", "label": "Percentage Of Level 3 Assets To Total Financial Instruments Measured At Fair Value", "terseLabel": "Percentage Of Level 3 Assets To Total Financial Instruments Measured At Fair Value" } } }, "localname": "PercentageOfLevel3AssetsToTotalFinancialInstrumentsMeasuredAtFairValue", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "percentItemType" }, "cinf_PersonalAutoMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Personal Auto [Member]", "label": "Personal Auto [Member]", "terseLabel": "Personal Auto", "verboseLabel": "Personal Auto" } } }, "localname": "PersonalAutoMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_PropertyCasualtyInsuranceAssumedAndCededBusinessTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Property Casualty Insurance Assumed And Ceded Business [Text Block]", "label": "Property Casualty Insurance Assumed And Ceded Business [Text Block]", "terseLabel": "Property Casualty Insurance Assumed And Ceded Business" } } }, "localname": "PropertyCasualtyInsuranceAssumedAndCededBusinessTextBlock", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReinsuranceTables" ], "xbrltype": "textBlockItemType" }, "cinf_PropertyCasualtyInsurancePremiumsWrittenOnAssumedAndCededBusinessLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Property Casualty Insurance Premiums Written On Assumed And Ceded Business", "label": "Property Casualty Insurance Premiums Written On Assumed And Ceded Business [Line Items]", "terseLabel": "Property Casualty Insurance Assumed And Ceded Business [Line Items]" } } }, "localname": "PropertyCasualtyInsurancePremiumsWrittenOnAssumedAndCededBusinessLineItems", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "stringItemType" }, "cinf_PropertyCasualtyInsurancePremiumsWrittenOnAssumedAndCededBusinessTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Property Casualty Insurance Premiums Written On Assumed And Ceded Business", "label": "Property Casualty Insurance Premiums Written On Assumed And Ceded Business [Table]", "terseLabel": "Property Casualty Insurance Assumed And Ceded Business [Table]" } } }, "localname": "PropertyCasualtyInsurancePremiumsWrittenOnAssumedAndCededBusinessTable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "stringItemType" }, "cinf_PurchaseOfTreasurySharesNonCash": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Purchase Of Treasury Shares Non Cash", "label": "Purchase Of Treasury Shares Non Cash", "verboseLabel": "Cashless exercise of stock options" } } }, "localname": "PurchaseOfTreasurySharesNonCash", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "cinf_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Reclassification Out of Accumulated Other Comprehensive Income [Table]", "label": "Reclassification Out of Accumulated Other Comprehensive Income [Line Items]", "terseLabel": "Reclassification Out of Accumulated Other Comprehensive Income [Line Items]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeLineItems", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "cinf_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax", "negatedTerseLabel": "Reclassification adjustment, tax" } } }, "localname": "ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "cinf_ReinsuranceassumedandothernonsegmentMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Reinsurance assumed and other non segment [Member]", "label": "Reinsurance assumed and other non segment [Member]", "terseLabel": "Reinsurance assumed and other non segment" } } }, "localname": "ReinsuranceassumedandothernonsegmentMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "cinf_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]", "label": "Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]", "terseLabel": "Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "cinf_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table]", "label": "Schedule Of Earnings Per Share Basic And Diluted By Common Class [Table]", "terseLabel": "Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table]" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "cinf_ScheduleOfInvestmentIncomeRealizedGainLossComprehensiveIncomeLossTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of investment income derived from investments in debt and equity securities consisting of interest income earned from investments in debt securities and on cash and cash equivalents, dividend income from investments in equity securities, and income or expense derived from the amortization of investment related discounts or premiums; proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales; components of comprehensive income.", "label": "Schedule Of Investment Income Realized Gain Loss Comprehensive Income Loss Table [Text Block]", "terseLabel": "Investment Income, Realized Investment Gains And Losses And Change In Unrealized Investment Gains And Losses" } } }, "localname": "ScheduleOfInvestmentIncomeRealizedGainLossComprehensiveIncomeLossTableTextBlock", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "cinf_ScheduleofDeferredPolicyAcquisitionCostsLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "[Line Items] for Schedule of Deferred Policy Acquisition Costs [Table]", "label": "Schedule of Deferred Policy Acquisition Costs [Line Items]", "terseLabel": "Schedule of Deferred Policy Acquisition Costs" } } }, "localname": "ScheduleofDeferredPolicyAcquisitionCostsLineItems", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "stringItemType" }, "cinf_ScheduleofDeferredPolicyAcquisitionCostsTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule of Deferred Policy Acquisition Costs [Table]", "label": "Schedule of Deferred Policy Acquisition Costs [Table]", "terseLabel": "Schedule of Deferred Policy Acquisition Costs" } } }, "localname": "ScheduleofDeferredPolicyAcquisitionCostsTable", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "stringItemType" }, "cinf_SeniorDebentures692PercentDue2028Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Debentures 6.92 Percent Due 2028 [Member]", "label": "Senior Debentures 6.92 Percent Due 2028 [Member]", "terseLabel": "Senior Debentures 6.920 % Due 2028" } } }, "localname": "SeniorDebentures692PercentDue2028Member", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SeniorDebentures69PercentDue2028Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Debentures 6.9 Percent Due 2028 [Member]", "label": "Senior Debentures 6.9 Percent Due 2028 [Member]", "terseLabel": "Senior Debentures 6.900 % Due 2028" } } }, "localname": "SeniorDebentures69PercentDue2028Member", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SeniorDebenturesSixPointNinePercentDueTwentyTwentyEightMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Debentures 6.9 Percent Due 2028 [Member]", "label": "Senior Debentures Six Point Nine Percent Due Twenty Twenty Eight [Member]", "terseLabel": "Senior Debentures 6.900% Due 2028" } } }, "localname": "SeniorDebenturesSixPointNinePercentDueTwentyTwentyEightMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SeniorDebenturesSixPointNineTwoPercentDueTwentyTwentyEightMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Debentures 6.92 Percent Due 2028 [Member]", "label": "Senior Debentures Six Point Nine Two Percent Due Twenty Twenty Eight [Member]", "terseLabel": "Senior Debentures 6.920% Due 2028" } } }, "localname": "SeniorDebenturesSixPointNineTwoPercentDueTwentyTwentyEightMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SeniorNotes6125PercentDue2034Member": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Notes 6.125 Percent Due 2034 [Member]", "label": "Senior Notes 6.125 Percent Due 2034 [Member]", "terseLabel": "Senior Notes 6.125 % Due 2034" } } }, "localname": "SeniorNotes6125PercentDue2034Member", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SeniorNotesSixPointOneTwoFivePercentDueTwentyThirtyFourMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Senior Notes 6.125 Percent Due 2034 [Member]", "label": "Senior Notes Six Point One Two Five Percent Due Twenty Thirty Four [Member]", "terseLabel": "Senior Notes 6.125% Due 2034" } } }, "localname": "SeniorNotesSixPointOneTwoFivePercentDueTwentyThirtyFourMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "cinf_SharesAcquiredDuringPeriodValueEmployeeShareBasedCompensationPlans": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Shares Acquired During Period, Value, Employee Share-Based Compensation Plans", "label": "Shares Acquired During Period, Value, Employee Share-Based Compensation Plans", "negatedTerseLabel": "Shares acquired - share-based compensation plans" } } }, "localname": "SharesAcquiredDuringPeriodValueEmployeeShareBasedCompensationPlans", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "cinf_SummaryOfConsolidatedPropertyCasualtyLossAndLossExpenseReservesRollForward": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Summary of Consolidated Property Casualty Loss and Loss Expense Reserves [Roll Forward]", "label": "Summary of Consolidated Property Casualty Loss and Loss Expense Reserves [Roll Forward]", "terseLabel": "Summary of Consolidated Property Casualty Loss and Loss Expense Reserves [Roll Forward]" } } }, "localname": "SummaryOfConsolidatedPropertyCasualtyLossAndLossExpenseReservesRollForward", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "stringItemType" }, "cinf_SyndicateBrokerRelationshipsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Syndicate Broker Relationships [Member]", "label": "Syndicate Broker Relationships [Member]", "terseLabel": "Syndicate broker relationships" } } }, "localname": "SyndicateBrokerRelationshipsMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "domainItemType" }, "cinf_TaxableFixedMaturitiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Taxable Fixed Maturities [Member]", "label": "Taxable Fixed Maturities [Member]", "terseLabel": "Taxable Fixed Maturities [Member]", "verboseLabel": "Taxable Fixed Maturities" } } }, "localname": "TaxableFixedMaturitiesMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "domainItemType" }, "cinf_UnderwritingAcquisitionAndInsuranceExpenses": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_BenefitsLossesAndExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of commissions, insurance operating expenses, increase in deferred acquisition costs and taxes, licenses and fees.", "label": "Underwriting Acquisition And Insurance Expenses", "terseLabel": "Underwriting, acquisition and insurance expenses" } } }, "localname": "UnderwritingAcquisitionAndInsuranceExpenses", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "cinf_UnrealizedgainsreclassifiedtoretainedearningsforASU201601aftertax": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Unrealized gains on equity securities reclassified from accumulated other comprehensive income to retained earnings, after tax upon adoption of ASU 2016-01.", "label": "Unrealized gains reclassified to retained earnings for ASU 2016-01, after tax", "terseLabel": "Unrealized gains reclassified to retained earnings for ASU 2016-01, after tax" } } }, "localname": "UnrealizedgainsreclassifiedtoretainedearningsforASU201601aftertax", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "cinf_ValueOfBusinessAcquiredMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Value Of Business Acquired [Member]", "label": "Value Of Business Acquired [Member]", "terseLabel": "Value of business acquired (VOBA)" } } }, "localname": "ValueOfBusinessAcquiredMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "domainItemType" }, "cinf_WorkersCompensationMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Workers' Compensation [Member]", "label": "Workers Compensation [Member]", "terseLabel": "Workers' Compensation" } } }, "localname": "WorkersCompensationMember", "nsuri": "http://www.cinfin.com/20190630", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "dei_AmendmentFlag": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.", "label": "Amendment Flag", "terseLabel": "Amendment Flag" } } }, "localname": "AmendmentFlag", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_CityAreaCode": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Area code of city", "label": "City Area Code", "terseLabel": "City Area Code" } } }, "localname": "CityAreaCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_CoverAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Cover page.", "label": "Cover page." } } }, "localname": "CoverAbstract", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "xbrltype": "stringItemType" }, "dei_CurrentFiscalYearEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "End date of current fiscal year in the format --MM-DD.", "label": "Current Fiscal Year End Date", "terseLabel": "Current Fiscal Year End Date" } } }, "localname": "CurrentFiscalYearEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "gMonthDayItemType" }, "dei_DocumentFiscalPeriodFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Document Fiscal Period Focus", "terseLabel": "Document Fiscal Period Focus" } } }, "localname": "DocumentFiscalPeriodFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "fiscalPeriodItemType" }, "dei_DocumentFiscalYearFocus": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This is focus fiscal year of the document report in CCYY 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.", "label": "Document Fiscal Year Focus", "terseLabel": "Document Fiscal Year Focus" } } }, "localname": "DocumentFiscalYearFocus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "gYearItemType" }, "dei_DocumentPeriodEndDate": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.", "label": "Document Period End Date", "terseLabel": "Document Period End Date" } } }, "localname": "DocumentPeriodEndDate", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "dateItemType" }, "dei_DocumentQuarterlyReport": { "auth_ref": [ "r390" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as an quarterly report.", "label": "Document Quarterly Report", "terseLabel": "Document Quarterly Report" } } }, "localname": "DocumentQuarterlyReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_DocumentTransitionReport": { "auth_ref": [ "r391" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true only for a form used as a transition report.", "label": "Document Transition Report", "terseLabel": "Document Transition Report" } } }, "localname": "DocumentTransitionReport", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_DocumentType": { "auth_ref": [], "lang": { "en-US": { "role": { "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'.", "label": "Document Type", "terseLabel": "Document Type" } } }, "localname": "DocumentType", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "submissionTypeItemType" }, "dei_EntityAddressAddressLine1": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Address Line 1 such as Attn, Building Name, Street Name", "label": "Entity Address, Address Line One", "terseLabel": "Entity Address, Address Line One" } } }, "localname": "EntityAddressAddressLine1", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressCityOrTown": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Name of the City or Town", "label": "Entity Address, City or Town", "terseLabel": "Entity Address, City or Town" } } }, "localname": "EntityAddressCityOrTown", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressPostalZipCode": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Code for the postal or zip code", "label": "Entity Address, Postal Zip Code", "terseLabel": "Entity Address, Postal Zip Code" } } }, "localname": "EntityAddressPostalZipCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityAddressStateOrProvince": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Name of the state or province.", "label": "Entity Address, State or Province", "terseLabel": "Entity Address, State or Province" } } }, "localname": "EntityAddressStateOrProvince", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "stateOrProvinceItemType" }, "dei_EntityCentralIndexKey": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.", "label": "Entity Central Index Key", "terseLabel": "Entity Central Index Key" } } }, "localname": "EntityCentralIndexKey", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "centralIndexKeyItemType" }, "dei_EntityCommonStockSharesOutstanding": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Entity Common Stock, Shares Outstanding", "terseLabel": "Entity Common Stock, Shares Outstanding (in shares)" } } }, "localname": "EntityCommonStockSharesOutstanding", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "sharesItemType" }, "dei_EntityCurrentReportingStatus": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Entity Current Reporting Status", "terseLabel": "Entity Current Reporting Status" } } }, "localname": "EntityCurrentReportingStatus", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "yesNoItemType" }, "dei_EntityEmergingGrowthCompany": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "Indicate if registrant meets the emerging growth company criteria.", "label": "Entity Emerging Growth Company", "terseLabel": "Entity Emerging Growth Company" } } }, "localname": "EntityEmergingGrowthCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_EntityFileNumber": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Entity File Number", "terseLabel": "Entity File Number" } } }, "localname": "EntityFileNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "fileNumberItemType" }, "dei_EntityFilerCategory": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "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.", "label": "Entity Filer Category", "terseLabel": "Entity Filer Category" } } }, "localname": "EntityFilerCategory", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "filerCategoryItemType" }, "dei_EntityIncorporationStateCountryCode": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Two-character EDGAR code representing the state or country of incorporation.", "label": "Entity Incorporation, State or Country Code", "terseLabel": "Entity Incorporation, State or Country Code" } } }, "localname": "EntityIncorporationStateCountryCode", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "edgarStateCountryItemType" }, "dei_EntityInteractiveDataCurrent": { "auth_ref": [ "r393" ], "lang": { "en-US": { "role": { "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).", "label": "Entity Interactive Data Current", "terseLabel": "Entity Interactive Data Current" } } }, "localname": "EntityInteractiveDataCurrent", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "yesNoItemType" }, "dei_EntityRegistrantName": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.", "label": "Entity Registrant Name", "terseLabel": "Entity Registrant Name" } } }, "localname": "EntityRegistrantName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_EntityShellCompany": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act.", "label": "Entity Shell Company", "terseLabel": "Entity Shell Company" } } }, "localname": "EntityShellCompany", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_EntitySmallBusiness": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "Indicates that the company is a Smaller Reporting Company (SRC).", "label": "Entity Small Business", "terseLabel": "Entity Small Business" } } }, "localname": "EntitySmallBusiness", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "booleanItemType" }, "dei_EntityTaxIdentificationNumber": { "auth_ref": [ "r392" ], "lang": { "en-US": { "role": { "documentation": "The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.", "label": "Entity Tax Identification Number", "terseLabel": "Entity Tax Identification Number" } } }, "localname": "EntityTaxIdentificationNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "employerIdItemType" }, "dei_LocalPhoneNumber": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Local phone number for entity.", "label": "Local Phone Number", "terseLabel": "Local Phone Number" } } }, "localname": "LocalPhoneNumber", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "normalizedStringItemType" }, "dei_Security12bTitle": { "auth_ref": [ "r388" ], "lang": { "en-US": { "role": { "documentation": "Title of a 12(b) registered security.", "label": "Title of 12(b) Security", "terseLabel": "Title of 12(b) Security" } } }, "localname": "Security12bTitle", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "securityTitleItemType" }, "dei_SecurityExchangeName": { "auth_ref": [ "r389" ], "lang": { "en-US": { "role": { "documentation": "Name of the Exchange on which a security is registered.", "label": "Security Exchange Name", "terseLabel": "Security Exchange Name" } } }, "localname": "SecurityExchangeName", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "edgarExchangeCodeItemType" }, "dei_TradingSymbol": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Trading symbol of an instrument as listed on an exchange.", "label": "Trading Symbol", "terseLabel": "Trading Symbol" } } }, "localname": "TradingSymbol", "nsuri": "http://xbrl.sec.gov/dei/2019-01-31", "presentation": [ "http://www.cinfin.com/role/Cover" ], "xbrltype": "tradingSymbolItemType" }, "invest_InvestmentSecuritiesClassAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Investment Securities Class [Axis]", "terseLabel": "Investment Securities Class [Axis]" } } }, "localname": "InvestmentSecuritiesClassAxis", "nsuri": "http://xbrl.sec.gov/invest/2013-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "stringItemType" }, "invest_InvestmentSecuritiesClassDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Investment Securities Class [Domain]", "terseLabel": "Investment Securities Class [Domain]" } } }, "localname": "InvestmentSecuritiesClassDomain", "nsuri": "http://xbrl.sec.gov/invest/2013-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "domainItemType" }, "srt_ConsolidatedPropertyAndCasualtyInsuranceEntityMember": { "auth_ref": [ "r341" ], "lang": { "en-US": { "role": { "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Consolidated Property and Casualty Insurance Entity [Member]", "terseLabel": "Consolidated Property and Casualty Insurance Entity" } } }, "localname": "ConsolidatedPropertyAndCasualtyInsuranceEntityMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "srt_ConsolidationItemsAxis": { "auth_ref": [ "r113", "r121" ], "lang": { "en-US": { "role": { "label": "Consolidation Items [Axis]", "terseLabel": "Consolidation Items [Axis]" } } }, "localname": "ConsolidationItemsAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "stringItemType" }, "srt_ConsolidationItemsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Consolidation Items [Domain]", "terseLabel": "Consolidation Items [Domain]" } } }, "localname": "ConsolidationItemsDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "srt_MaximumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Maximum [Member]", "terseLabel": "Maximum" } } }, "localname": "MaximumMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails", "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_MinimumMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Minimum [Member]", "terseLabel": "Minimum" } } }, "localname": "MinimumMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails", "http://www.cinfin.com/role/AcquisitionNarrativeDetails" ], "xbrltype": "domainItemType" }, "srt_ProductOrServiceAxis": { "auth_ref": [ "r123", "r173", "r174", "r359" ], "lang": { "en-US": { "role": { "label": "Product and Service [Axis]", "terseLabel": "Insurance Policy [Axis]", "verboseLabel": "Product and Service [Axis]" } } }, "localname": "ProductOrServiceAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "stringItemType" }, "srt_ProductsAndServicesDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Product and Service [Domain]", "terseLabel": "Product and Service [Domain]", "verboseLabel": "Product and Service" } } }, "localname": "ProductsAndServicesDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "srt_RangeAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Axis]", "terseLabel": "Range [Axis]" } } }, "localname": "RangeAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails", "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "srt_RangeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Range [Domain]", "terseLabel": "Range [Domain]" } } }, "localname": "RangeMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails", "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]", "terseLabel": "Reinsurance for Insurance Companies, by Product Segment [Line Items]" } } }, "localname": "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "stringItemType" }, "srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable": { "auth_ref": [ "r339" ], "lang": { "en-US": { "role": { "label": "SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table]", "terseLabel": "Reinsurance for Insurance Companies, by Product Segment [Table]" } } }, "localname": "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "stringItemType" }, "srt_RestatementAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Axis]", "terseLabel": "Restatement [Axis]" } } }, "localname": "RestatementAxis", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "srt_RestatementDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Restatement [Domain]", "terseLabel": "Restatement [Domain]" } } }, "localname": "RestatementDomain", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "srt_ScenarioPreviouslyReportedMember": { "auth_ref": [ "r97", "r98", "r99" ], "lang": { "en-US": { "role": { "label": "Previously Reported [Member]", "terseLabel": "Previously Reported" } } }, "localname": "ScenarioPreviouslyReportedMember", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "srt_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Line Items]", "terseLabel": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters" } } }, "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersLineItems", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "srt_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable": { "auth_ref": [ "r342" ], "lang": { "en-US": { "role": { "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Table]", "terseLabel": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Table]" } } }, "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersTable", "nsuri": "http://fasb.org/srt/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_AccountingPoliciesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accounting Policies [Abstract]" } } }, "localname": "AccountingPoliciesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_AccruedInvestmentIncomeReceivable": { "auth_ref": [ "r15", "r274", "r316" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments.", "label": "Accrued Investment Income Receivable", "terseLabel": "Investment income receivable" } } }, "localname": "AccruedInvestmentIncomeReceivable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember": { "auth_ref": [ "r36", "r42", "r43", "r187", "r239" ], "lang": { "en-US": { "role": { "documentation": "Accumulated other comprehensive (income) loss related to defined benefit plans attributable to the parent.", "label": "Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]", "terseLabel": "Accumulated Defined Benefit Plans Adjustment" } } }, "localname": "AccumulatedDefinedBenefitPlansAdjustmentMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment": { "auth_ref": [ "r23", "r156" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.", "label": "Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment", "terseLabel": "Land, building and equipment, accumulated depreciation" } } }, "localname": "AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember": { "auth_ref": [ "r32", "r33", "r34", "r42", "r43" ], "lang": { "en-US": { "role": { "documentation": "Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent.", "label": "Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]", "terseLabel": "Accumulated Net Unrealized Investment Gain (Loss)" } } }, "localname": "AccumulatedNetUnrealizedInvestmentGainLossMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "domainItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).", "label": "AOCI Including Portion Attributable to Noncontrolling Interest, before Tax", "periodEndLabel": "Accumulated other comprehensive income, before tax, end of period", "periodStartLabel": "Accumulated other comprehensive income, before tax, beginning of period" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossBeforeTax1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r39", "r41", "r42" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null }, "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.", "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax", "periodEndLabel": "Accumulated other comprehensive income, net of tax, end of period", "terseLabel": "Accumulated other comprehensive income", "totalLabel": "Accumulated other comprehensive income, net of tax, beginning of period" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]", "terseLabel": "Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]" } } }, "localname": "AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AccumulatedOtherComprehensiveIncomeMember": { "auth_ref": [ "r38", "r42", "r43", "r239" ], "lang": { "en-US": { "role": { "documentation": "Accumulated increase (decrease) in equity from transactions and other events and circumstances from non-owner sources, attributable to the parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners.", "label": "AOCI Attributable to Parent [Member]", "terseLabel": "Accumulated Other Comprehensive Income", "verboseLabel": "Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "AccumulatedOtherComprehensiveIncomeMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife": { "auth_ref": [ "r151" ], "lang": { "en-US": { "role": { "documentation": "Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.", "label": "Acquired Finite-lived Intangible Assets, Weighted Average Useful Life", "terseLabel": "Useful life" } } }, "localname": "AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails" ], "xbrltype": "durationItemType" }, "us-gaap_AdditionalPaidInCapitalCommonStock": { "auth_ref": [ "r16" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.", "label": "Additional Paid in Capital, Common Stock", "terseLabel": "Paid-in capital" } } }, "localname": "AdditionalPaidInCapitalCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdditionalPaidInCapitalMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders.", "label": "Additional Paid-in Capital [Member]", "terseLabel": "Paid-In Capital" } } }, "localname": "AdditionalPaidInCapitalMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_AdditionsToContractHoldersFunds": { "auth_ref": [ "r70" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow from a segregated fund account during the period.", "label": "Additions to Contract Holders Funds", "terseLabel": "Contract holders' funds deposited" } } }, "localname": "AdditionsToContractHoldersFunds", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsForNewAccountingPronouncementsAxis": { "auth_ref": [ "r93" ], "lang": { "en-US": { "role": { "documentation": "Information by new accounting pronouncement.", "label": "Adjustments for New Accounting Pronouncements [Axis]", "terseLabel": "Adjustments for New Accounting Pronouncements [Axis]" } } }, "localname": "AdjustmentsForNewAccountingPronouncementsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue": { "auth_ref": [ "r200", "r202", "r208", "r209" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.", "label": "Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition", "terseLabel": "Share-based compensation" } } }, "localname": "AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Adjustments to reconcile net income to net cash provided by operating activities:" } } }, "localname": "AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount": { "auth_ref": [ "r107" ], "lang": { "en-US": { "role": { "documentation": "Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.", "label": "Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount", "terseLabel": "Number of anti-dilutive stock-based awards (in shares)" } } }, "localname": "AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_Assets": { "auth_ref": [ "r117", "r275", "r310" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.", "label": "Assets", "terseLabel": "Assets", "totalLabel": "Total assets" } } }, "localname": "Assets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Assets [Abstract]", "terseLabel": "Assets" } } }, "localname": "AssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_AssumedPremiumsEarned": { "auth_ref": [ "r325", "r337", "r365", "r368" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of earned premiums assumed from other entities.", "label": "Assumed Premiums Earned", "verboseLabel": "Assumed earned premiums" } } }, "localname": "AssumedPremiumsEarned", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AssumedPremiumsWritten": { "auth_ref": [ "r365" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of written premiums assumed from other entities.", "label": "Assumed Premiums Written", "verboseLabel": "Assumed written premiums" } } }, "localname": "AssumedPremiumsWritten", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis": { "auth_ref": [ "r131" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Debt Securities, Available-for-sale, Amortized Cost", "terseLabel": "Fixed maturities, amortized cost", "totalLabel": "Total" } } }, "localname": "AvailableForSaleDebtSecuritiesAmortizedCostBasis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.", "label": "Available-for-sale Equity Securities, Amortized Cost Basis", "terseLabel": "Available-for-sale Equity Securities, Amortized Cost Basis" } } }, "localname": "AvailableForSaleEquitySecuritiesAmortizedCostBasis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecurities": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail": { "order": 3.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesAmortizedCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.", "label": "Available-for-sale Securities", "terseLabel": "Fair Value" } } }, "localname": "AvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax": { "auth_ref": [ "r133" ], "calculation": { "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail": { "order": 1.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesAmortizedCost", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.", "label": "Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax", "terseLabel": "Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax" } } }, "localname": "AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail": { "order": 2.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesAmortizedCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.", "label": "Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax", "terseLabel": "Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax" } } }, "localname": "AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesAmortizedCost": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.", "label": "Available-for-sale Securities, Amortized Cost Basis", "totalLabel": "Cost or Amortized Cost" } } }, "localname": "AvailableForSaleSecuritiesAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value", "totalLabel": "Total Fair Value" } } }, "localname": "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": 1.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value", "terseLabel": "Less than 12 months Fair Value" } } }, "localname": "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail": { "order": 2.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.", "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value", "verboseLabel": "12 months or more Fair Value" } } }, "localname": "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost": { "auth_ref": [ "r138" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 3.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth fiscal year through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost", "terseLabel": "Due after five years through ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue": { "auth_ref": [ "r134", "r138", "r294" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 3.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value", "terseLabel": "Due after five years through ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost": { "auth_ref": [ "r137" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 2.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost", "terseLabel": "Due after one year through five years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue": { "auth_ref": [ "r134", "r137", "r293" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 2.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value", "terseLabel": "Due after one year through five years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost": { "auth_ref": [ "r139" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 4.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost", "terseLabel": "Due after ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue": { "auth_ref": [ "r134", "r139", "r295" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 4.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value", "terseLabel": "Due after ten years" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]", "terseLabel": "Fair value" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasisAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]", "terseLabel": "Amortized cost" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasisAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "stringItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost": { "auth_ref": [ "r136" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 1.0, "parentTag": "us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amortized cost of investment in debt security measured at fair value with change recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost", "terseLabel": "Due in one year or less" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue": { "auth_ref": [ "r134", "r136", "r292" ], "calculation": { "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": 1.0, "parentTag": "us-gaap_AvailableForSaleSecuritiesDebtSecurities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.", "label": "Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value", "terseLabel": "Due in one year or less" } } }, "localname": "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesDebtSecurities": { "auth_ref": [ "r128", "r132" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Investments", "weight": 1.0 }, "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Debt Securities, Available-for-sale", "terseLabel": "Fixed maturities, at fair value", "totalLabel": "Total", "verboseLabel": "Fixed maturities, at fair value (amortized cost: 2019\u2014$10,832; 2018\u2014$10,643)" } } }, "localname": "AvailableForSaleSecuritiesDebtSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsScheduleOfContractualMaturitiesOfInvestmentsDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesEquitySecurities": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of equity securities categorized neither as held-to-maturity nor as trading.", "label": "Available-for-sale Securities, Equity Securities", "terseLabel": "Equity securities, at fair value", "verboseLabel": "Equity securities, at fair value (cost: 2019\u2014$3,471; 2018\u2014$3,368)" } } }, "localname": "AvailableForSaleSecuritiesEquitySecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesGrossRealizedGains": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.", "label": "Available-for-sale Securities, Gross Realized Gains", "terseLabel": "Gross realized gains" } } }, "localname": "AvailableForSaleSecuritiesGrossRealizedGains", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.", "label": "Available-for-sale Securities, Gross Realized Losses", "negatedTerseLabel": "Available-for-sale Securities, Gross Realized Losses" } } }, "localname": "AvailableForSaleSecuritiesGrossRealizedLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_AvailableForSaleSecuritiesTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.", "label": "Available-for-sale Securities [Table Text Block]", "terseLabel": "Analysis Of Cost Or Amortized Cost, Gross Unrealized Gains And Losses And Fair Value for Investments" } } }, "localname": "AvailableForSaleSecuritiesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_AwardTypeAxis": { "auth_ref": [ "r203", "r206" ], "lang": { "en-US": { "role": { "documentation": "Information by award type pertaining to equity-based compensation.", "label": "Award Type [Axis]", "terseLabel": "Award Type [Axis]" } } }, "localname": "AwardTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_BenefitsLossesAndExpenses": { "auth_ref": [ "r334" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.", "label": "Benefits, Losses and Expenses", "totalLabel": "Total benefits and expenses" } } }, "localname": "BenefitsLossesAndExpenses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_BenefitsLossesAndExpensesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Benefits, Losses and Expenses [Abstract]", "terseLabel": "Benefits and Expenses" } } }, "localname": "BenefitsLossesAndExpensesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessAcquisitionAcquireeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Identification of the acquiree in a material business combination (or series of individually immaterial business combinations), which may include the name or other type of identification of the acquiree.", "label": "Business Acquisition, Acquiree [Domain]", "terseLabel": "Business Acquisition, Acquiree [Domain]" } } }, "localname": "BusinessAcquisitionAcquireeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "domainItemType" }, "us-gaap_BusinessAcquisitionAxis": { "auth_ref": [ "r228", "r229" ], "lang": { "en-US": { "role": { "documentation": "Information by business combination or series of individually immaterial business combinations.", "label": "Business Acquisition [Axis]", "terseLabel": "Business Acquisition [Axis]" } } }, "localname": "BusinessAcquisitionAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessAcquisitionLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Business Acquisition [Line Items]", "terseLabel": "Business Acquisition" } } }, "localname": "BusinessAcquisitionLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationDisclosureTextBlock": { "auth_ref": [ "r235" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).", "label": "Business Combination Disclosure [Text Block]", "terseLabel": "Acquisition" } } }, "localname": "BusinessCombinationDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/Acquisition" ], "xbrltype": "textBlockItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 1.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of assets acquired at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets", "terseLabel": "Total assets acquired (including fair value of identifiable intangible assets)" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]", "terseLabel": "Assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 2.0, "parentTag": "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents", "terseLabel": "Cash and cash equivalents" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 3.0, "parentTag": "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables", "terseLabel": "Premiums receivable" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets": { "auth_ref": [ "r211", "r231" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date.", "label": "Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets", "terseLabel": "Net deferred tax assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets": { "auth_ref": [ "r230", "r231", "r257" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 1.0, "parentTag": "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of financial assets (as defined) recognized as of the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Assets", "terseLabel": "Investments and other invested assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets": { "auth_ref": [ "r231" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets", "terseLabel": "Indefinite lived intangible assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill": { "auth_ref": [ "r231" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of intangible assets, excluding goodwill, acquired at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill", "verboseLabel": "Total fair value of identifiable intangible assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwillAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill [Abstract]", "terseLabel": "Fair value of identifiable intangible assets:" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwillAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": { "auth_ref": [ "r230", "r231" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of identifiable intangible assets recognized as of the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles", "terseLabel": "Definite lived intangible assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 2.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities assumed at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities", "terseLabel": "Total liabilities assumed", "totalLabel": "Total liabilities assumed" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]", "terseLabel": "Liabilities" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "stringItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet": { "auth_ref": [ "r230", "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 1.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net", "totalLabel": "Fair value of net assets acquired prior to allocation of goodwill" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 3.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other", "terseLabel": "Other liabilities" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 5.0, "parentTag": "cinf_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAssetsExcludingIntangibleAssets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.", "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets", "terseLabel": "Other assets" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet": { "auth_ref": [ "r231" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.", "label": "Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net", "totalLabel": "Total purchase price paid" } } }, "localname": "BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_BusinessCombinationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Business Combinations [Abstract]" } } }, "localname": "BusinessCombinationsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_CapitalLeaseObligationsIncurred": { "auth_ref": [ "r83", "r84" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase during the period in capital lease obligations due to entering into new capital leases.", "label": "Capital Lease Obligations Incurred", "terseLabel": "Equipment acquired under capital lease obligations" } } }, "localname": "CapitalLeaseObligationsIncurred", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsAtCarryingValue": { "auth_ref": [ "r1", "r21", "r81" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.", "label": "Cash and Cash Equivalents, at Carrying Value", "periodEndLabel": "Cash and cash equivalents at end of period", "periodStartLabel": "Cash and cash equivalents at beginning of year", "terseLabel": "Cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.", "label": "Cash and Cash Equivalents, Period Increase (Decrease)", "totalLabel": "Net change in cash and cash equivalents" } } }, "localname": "CashAndCashEquivalentsPeriodIncreaseDecrease", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]", "terseLabel": "Noncash Activities" } } }, "localname": "CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_CededPremiumsEarned": { "auth_ref": [ "r325", "r336", "r362", "r363", "r366", "r368" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of earned premiums ceded to other entities.", "label": "Ceded Premiums Earned", "terseLabel": "Ceded earned premiums" } } }, "localname": "CededPremiumsEarned", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_CededPremiumsWritten": { "auth_ref": [ "r366", "r368" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of written premiums ceded to other entities.", "label": "Ceded Premiums Written", "terseLabel": "Ceded written premiums" } } }, "localname": "CededPremiumsWritten", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ClassOfStockDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share of stock differentiated by the voting rights the holder receives. Examples include, but are not limited to, common stock, redeemable preferred stock, nonredeemable preferred stock, and convertible stock.", "label": "Class of Stock [Domain]", "terseLabel": "Class of Stock [Domain]" } } }, "localname": "ClassOfStockDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "domainItemType" }, "us-gaap_CommercialMortgageBackedSecuritiesMember": { "auth_ref": [ "r140", "r179" ], "lang": { "en-US": { "role": { "documentation": "Securities collateralized by commercial real estate mortgage loans.", "label": "Commercial Mortgage Backed Securities [Member]", "terseLabel": "Commercial mortgage-backed" } } }, "localname": "CommercialMortgageBackedSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CommitmentsAndContingencies": { "auth_ref": [ "r29", "r162", "r283", "r319" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.", "label": "Commitments and Contingencies", "terseLabel": "Commitments and contingent liabilities (Note 12)" } } }, "localname": "CommitmentsAndContingencies", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Commitments and Contingencies Disclosure [Abstract]" } } }, "localname": "CommitmentsAndContingenciesDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_CommitmentsAndContingenciesDisclosureTextBlock": { "auth_ref": [ "r161", "r163" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for commitments and contingencies.", "label": "Commitments and Contingencies Disclosure [Text Block]", "terseLabel": "Commitments And Contingent Liabilities" } } }, "localname": "CommitmentsAndContingenciesDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CommitmentsAndContingentLiabilities" ], "xbrltype": "textBlockItemType" }, "us-gaap_CommonStockDividendsPerShareDeclared": { "auth_ref": [ "r170" ], "lang": { "en-US": { "role": { "documentation": "Aggregate dividends declared during the period for each share of common stock outstanding.", "label": "Common Stock, Dividends, Per Share, Declared", "terseLabel": "Dividends declared (in USD per share)" } } }, "localname": "CommonStockDividendsPerShareDeclared", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquityParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Stock that is subordinate to all other stock of the issuer.", "label": "Common Stock [Member]", "terseLabel": "Common equities" } } }, "localname": "CommonStockMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CommonStockParOrStatedValuePerShare": { "auth_ref": [ "r14" ], "lang": { "en-US": { "role": { "documentation": "Face amount or stated value per share of common stock.", "label": "Common Stock, Par or Stated Value Per Share", "terseLabel": "Common stock, par value" } } }, "localname": "CommonStockParOrStatedValuePerShare", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "perShareItemType" }, "us-gaap_CommonStockSharesAuthorized": { "auth_ref": [ "r14" ], "lang": { "en-US": { "role": { "documentation": "The maximum number of common shares permitted to be issued by an entity's charter and bylaws.", "label": "Common Stock, Shares Authorized", "terseLabel": "Common stock, authorized" } } }, "localname": "CommonStockSharesAuthorized", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesIssued": { "auth_ref": [ "r14" ], "lang": { "en-US": { "role": { "documentation": "Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.", "label": "Common Stock, Shares, Issued", "terseLabel": "Common stock, issued" } } }, "localname": "CommonStockSharesIssued", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockSharesOutstanding": { "auth_ref": [ "r14", "r165" ], "lang": { "en-US": { "role": { "documentation": "Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.", "label": "Common Stock, Shares, Outstanding", "periodEndLabel": "Ending Balance (in shares)", "periodStartLabel": "Beginning Balance (in shares)", "terseLabel": "Common stock, outstanding" } } }, "localname": "CommonStockSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_CommonStockValue": { "auth_ref": [ "r14" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.", "label": "Common Stock, Value, Issued", "terseLabel": "Common stock, par value\u2014$2 per share; (authorized: 2019 and 2018\u2014500 million shares; issued: 2019 and 2018\u2014198.3 million shares)" } } }, "localname": "CommonStockValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_CompensationAndRetirementDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Retirement Benefits [Abstract]" } } }, "localname": "CompensationAndRetirementDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_ComprehensiveIncomeNetOfTax": { "auth_ref": [ "r46", "r48", "r49" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.", "label": "Comprehensive Income (Loss), Net of Tax, Attributable to Parent", "totalLabel": "Comprehensive Income (Loss)" } } }, "localname": "ComprehensiveIncomeNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_ComprehensiveIncomeNoteTextBlock": { "auth_ref": [ "r60" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.", "label": "Comprehensive Income (Loss) Note [Text Block]", "terseLabel": "Accumulated Other Comprehensive Income" } } }, "localname": "ComprehensiveIncomeNoteTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncome" ], "xbrltype": "textBlockItemType" }, "us-gaap_ConversionOfStockAmountConverted1": { "auth_ref": [ "r83", "r84", "r85" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The value of the stock converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. \"Part noncash\" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.", "label": "Conversion of Stock, Amount Converted", "terseLabel": "Conversion of securities" } } }, "localname": "ConversionOfStockAmountConverted1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_CorporateBondSecuritiesMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This category includes information about long-term debt securities that are issued by either a domestic or foreign corporate business entity with a date certain promise of repayment and a return to the holder for the time value of money (for example, variable or fixed interest, original issue discount).", "label": "Corporate Bond Securities [Member]", "terseLabel": "Corporate" } } }, "localname": "CorporateBondSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CorporateDebtSecuritiesMember": { "auth_ref": [ "r179", "r197" ], "lang": { "en-US": { "role": { "documentation": "Debt securities issued by domestic or foreign corporate business, banks and other entities with a promise of repayment.", "label": "Corporate Debt Securities [Member]", "terseLabel": "Corporate Fixed Maturities" } } }, "localname": "CorporateDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CorporateNonSegmentMember": { "auth_ref": [ "r122" ], "lang": { "en-US": { "role": { "documentation": "Corporate headquarters or functional department that may not earn revenues or may earn revenues that are only incidental to the activities of the entity and is not considered an operating segment.", "label": "Corporate, Non-Segment [Member]", "terseLabel": "Corporate, Non-Segment" } } }, "localname": "CorporateNonSegmentMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.", "label": "Cumulative Effect of New Accounting Principle in Period of Adoption", "totalLabel": "Cumulative effect of change in accounting for equity securities, net" } } }, "localname": "CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_CurrentIncomeTaxExpenseBenefit": { "auth_ref": [ "r87", "r220", "r224" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.", "label": "Current Income Tax Expense (Benefit)", "terseLabel": "Current" } } }, "localname": "CurrentIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentAxis": { "auth_ref": [ "r6", "r8", "r9", "r276", "r278", "r305" ], "lang": { "en-US": { "role": { "documentation": "Information by type of debt instrument, including, but not limited to, draws against credit facilities.", "label": "Debt Instrument [Axis]", "terseLabel": "Debt Instrument [Axis]" } } }, "localname": "DebtInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail", "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentFaceAmount": { "auth_ref": [ "r260", "r262" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Face (par) amount of debt instrument at time of issuance.", "label": "Debt Instrument, Face Amount", "verboseLabel": "Principal amount of debt" } } }, "localname": "DebtInstrumentFaceAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentFairValue": { "auth_ref": [ "r256" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.", "label": "Debt Instrument, Fair Value Disclosure", "verboseLabel": "Total" } } }, "localname": "DebtInstrumentFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DebtInstrumentInterestRateStatedPercentage": { "auth_ref": [ "r26" ], "lang": { "en-US": { "role": { "documentation": "Contractual interest rate for funds borrowed, under the debt agreement.", "label": "Debt Instrument, Interest Rate, Stated Percentage", "terseLabel": "Interest rate" } } }, "localname": "DebtInstrumentInterestRateStatedPercentage", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail", "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "percentItemType" }, "us-gaap_DebtInstrumentLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Debt Instrument [Line Items]", "terseLabel": "Debt Instrument [Line Items]" } } }, "localname": "DebtInstrumentLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentMaturityDateDescription": { "auth_ref": [ "r27" ], "lang": { "en-US": { "role": { "documentation": "Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.", "label": "Debt Instrument, Maturity Date, Description", "terseLabel": "Debt instrument, year of maturity" } } }, "localname": "DebtInstrumentMaturityDateDescription", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DebtInstrumentNameDomain": { "auth_ref": [ "r28" ], "lang": { "en-US": { "role": { "documentation": "The name for the particular debt instrument or borrowing that distinguishes it from other debt instruments or borrowings, including draws against credit facilities.", "label": "Debt Instrument, Name [Domain]", "terseLabel": "Debt Instrument, Name [Domain]" } } }, "localname": "DebtInstrumentNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail", "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_DebtInstrumentTable": { "auth_ref": [ "r28", "r88", "r166", "r167", "r168", "r169", "r259", "r260", "r262", "r298" ], "lang": { "en-US": { "role": { "documentation": "A table or schedule providing information pertaining to long-term debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer.", "label": "Schedule of Long-term Debt Instruments [Table]", "terseLabel": "Schedule of Long-term Debt Instruments [Table]" } } }, "localname": "DebtInstrumentTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DebtSecuritiesMember": { "auth_ref": [ "r146" ], "lang": { "en-US": { "role": { "documentation": "Debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions.", "label": "Debt Securities [Member]", "terseLabel": "Fixed maturities", "verboseLabel": "Debt Securities" } } }, "localname": "DebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_DeferredCostsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Deferred Costs [Abstract]" } } }, "localname": "DeferredCostsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_DeferredIncomeTaxExpenseBenefit": { "auth_ref": [ "r79", "r87", "r221", "r224" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.", "label": "Deferred Income Tax Expense (Benefit)", "terseLabel": "Deferred", "verboseLabel": "Deferred income tax expense" } } }, "localname": "DeferredIncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredIncomeTaxLiabilities": { "auth_ref": [ "r10", "r11", "r218", "r277", "r304" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of deferred tax liability attributable to taxable temporary differences.", "label": "Deferred Tax Liabilities, Gross", "terseLabel": "Deferred income tax" } } }, "localname": "DeferredIncomeTaxLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense": { "auth_ref": [ "r79", "r299", "r329", "r345" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of amortization expense (reversal of expense) for deferred policy acquisition costs.", "label": "Deferred Policy Acquisition Costs, Amortization Expense", "negatedTerseLabel": "Amortized deferred policy acquisition costs" } } }, "localname": "DeferredPolicyAcquisitionCostAmortizationExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredPolicyAcquisitionCostAmortizationExpenseOther": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of other increase (decrease) to amortization expense of deferred policy acquisition cost (DAC).", "label": "Deferred Policy Acquisition Cost, Amortization Expense, Other", "negatedTerseLabel": "Shadow deferred policy acquisition costs" } } }, "localname": "DeferredPolicyAcquisitionCostAmortizationExpenseOther", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredPolicyAcquisitionCosts": { "auth_ref": [ "r317", "r343", "r347", "r374" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date.", "label": "Deferred Policy Acquisition Costs", "periodEndLabel": "Deferred policy acquisition costs asset, end of period", "periodStartLabel": "Deferred policy acquisition costs asset, beginning of period", "terseLabel": "Deferred policy acquisition costs" } } }, "localname": "DeferredPolicyAcquisitionCosts", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredPolicyAcquisitionCostsAdditions": { "auth_ref": [ "r344" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Total amount of policy acquisition costs capitalized during the income statement period.", "label": "Deferred Policy Acquisition Costs, Additions", "terseLabel": "Capitalized deferred policy acquisition costs" } } }, "localname": "DeferredPolicyAcquisitionCostsAdditions", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DeferredPolicyAcquisitionCostsTableTextBlock": { "auth_ref": [ "r346" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the movement in deferred policy acquisition costs.", "label": "Deferred Policy Acquisition Costs [Table Text Block]", "terseLabel": "Deferred Policy Acquisition Costs And Asset Reconciliation, Including the Amortized Deferred Policy Acquisition Costs" } } }, "localname": "DeferredPolicyAcquisitionCostsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_DeferredPolicyAcquisitionCostsTextBlock1": { "auth_ref": [ "r348" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for deferred policy acquisition costs.", "label": "Deferred Policy Acquisition Costs [Text Block]", "terseLabel": "Deferred Acquisition Costs" } } }, "localname": "DeferredPolicyAcquisitionCostsTextBlock1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCosts" ], "xbrltype": "textBlockItemType" }, "us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses": { "auth_ref": [ "r185", "r196", "r197" ], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 3.0, "parentTag": "cinf_DefinedBenefitPlanNonServiceCostBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.", "label": "Defined Benefit Plan, Amortization of Gain (Loss)", "negatedTerseLabel": "Amortization of actuarial loss and prior service cost" } } }, "localname": "DefinedBenefitPlanAmortizationOfGainsLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanDisclosureLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Defined Benefit Plan Disclosure [Line Items]", "terseLabel": "Defined Benefit Plan Disclosure" } } }, "localname": "DefinedBenefitPlanDisclosureLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets": { "auth_ref": [ "r184", "r195", "r197" ], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 2.0, "parentTag": "cinf_DefinedBenefitPlanNonServiceCostBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.", "label": "Defined Benefit Plan, Expected Return (Loss) on Plan Assets", "negatedLabel": "Expected return on plan assets" } } }, "localname": "DefinedBenefitPlanExpectedReturnOnPlanAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanInterestCost": { "auth_ref": [ "r178", "r183", "r194", "r197" ], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 1.0, "parentTag": "cinf_DefinedBenefitPlanNonServiceCostBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost recognized for passage of time related to defined benefit plan.", "label": "Defined Benefit Plan, Interest Cost", "terseLabel": "Interest cost" } } }, "localname": "DefinedBenefitPlanInterestCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost": { "auth_ref": [ "r181", "r192", "r197" ], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of net periodic benefit cost (credit) for defined benefit plan.", "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)", "totalLabel": "Net periodic benefit cost" } } }, "localname": "DefinedBenefitPlanNetPeriodicBenefitCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanOtherCosts": { "auth_ref": [], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 4.0, "parentTag": "cinf_DefinedBenefitPlanNonServiceCostBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of defined benefit plan cost (credit), classified as other.", "label": "Defined Benefit Plan, Other Cost (Credit)", "terseLabel": "Other" } } }, "localname": "DefinedBenefitPlanOtherCosts", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedBenefitPlanServiceCost": { "auth_ref": [ "r177", "r182", "r193", "r197" ], "calculation": { "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail": { "order": 1.0, "parentTag": "us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.", "label": "Defined Benefit Plan, Service Cost", "terseLabel": "Service cost" } } }, "localname": "DefinedBenefitPlanServiceCost", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of discretionary contributions made by an employer to a defined contribution plan.", "label": "Defined Contribution Plan, Employer Discretionary Contribution Amount", "terseLabel": "Matching contributions to 401(k) and Top Hat plans" } } }, "localname": "DefinedContributionPlanEmployerDiscretionaryContributionAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DepreciationAmortizationAndAccretionNet": { "auth_ref": [ "r79" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.", "label": "Depreciation, Amortization and Accretion, Net", "terseLabel": "Depreciation and amortization" } } }, "localname": "DepreciationAmortizationAndAccretionNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_DerivativeContractTypeDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Financial instrument or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.", "label": "Derivative Contract [Domain]", "terseLabel": "Derivative, Name [Domain]" } } }, "localname": "DerivativeContractTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_DerivativeInstrumentRiskAxis": { "auth_ref": [ "r240", "r241", "r242", "r243" ], "lang": { "en-US": { "role": { "documentation": "Information by type of derivative contract.", "label": "Derivative Instrument [Axis]", "terseLabel": "Derivative, by Nature [Axis]" } } }, "localname": "DerivativeInstrumentRiskAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_DevelopedTechnologyRightsMember": { "auth_ref": [ "r233" ], "lang": { "en-US": { "role": { "documentation": "Rights to developed technology, which can include the right to develop, use, market, sell, or offer for sale products, compounds, or intellectual property.", "label": "Developed Technology Rights [Member]", "terseLabel": "Internally developed technology" } } }, "localname": "DevelopedTechnologyRightsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "domainItemType" }, "us-gaap_DirectPremiumsEarned": { "auth_ref": [ "r325", "r335", "r364", "r367" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums earned.", "label": "Direct Premiums Earned", "terseLabel": "Direct earned premiums" } } }, "localname": "DirectPremiumsEarned", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_DirectPremiumsWritten": { "auth_ref": [ "r364" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written.", "label": "Direct Premiums Written", "verboseLabel": "Direct written premiums" } } }, "localname": "DirectPremiumsWritten", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_DividendsCommonStockCash": { "auth_ref": [ "r170" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.", "label": "Dividends, Common Stock, Cash", "negatedLabel": "Dividends declared (per share of $0.56, $0.53, $1.12 and $1.06, respectively)" } } }, "localname": "DividendsCommonStockCash", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_EarningsPerShareAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share [Abstract]", "terseLabel": "Per Common Share" } } }, "localname": "EarningsPerShareAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareBasic": { "auth_ref": [ "r53", "r94", "r102", "r104", "r105", "r106", "r109", "r288", "r327" ], "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.", "label": "Earnings Per Share, Basic", "terseLabel": "Basic (in USD per share)", "verboseLabel": "Net income\u2014basic" } } }, "localname": "EarningsPerShareBasic", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareBasicAndDilutedAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Earnings Per Share, Basic and Diluted [Abstract]", "terseLabel": "Earnings per share:" } } }, "localname": "EarningsPerShareBasicAndDilutedAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_EarningsPerShareDiluted": { "auth_ref": [ "r53", "r94", "r102", "r104", "r105", "r106", "r109", "r288", "r327" ], "lang": { "en-US": { "role": { "documentation": "The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.", "label": "Earnings Per Share, Diluted", "terseLabel": "Diluted (in USD per share)", "verboseLabel": "Net income\u2014diluted" } } }, "localname": "EarningsPerShareDiluted", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "perShareItemType" }, "us-gaap_EarningsPerShareTextBlock": { "auth_ref": [ "r110" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for earnings per share.", "label": "Earnings Per Share [Text Block]", "terseLabel": "Net Income Per Common Share" } } }, "localname": "EarningsPerShareTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShare" ], "xbrltype": "textBlockItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperations": { "auth_ref": [ "r90", "r212", "r213" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "lang": { "en-US": { "role": { "documentation": "Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Effective Income Tax Rate Reconciliation, Percent", "totalLabel": "Provision for income taxes" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Effective Income Tax Rate Reconciliation, Percent [Abstract]", "terseLabel": "Increase (decrease) resulting from:" } } }, "localname": "EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "stringItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r212", "r213", "r223" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 1.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of domestic federal statutory tax rate applicable to pretax income (loss).", "label": "Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent", "terseLabel": "Tax at statutory rate", "verboseLabel": "Tax at statutory rate, percentage" } } }, "localname": "EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail", "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsDividends": { "auth_ref": [ "r212", "r213", "r223" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 3.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": -1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Dividend, Percent", "negatedTerseLabel": "Dividend received exclusion" } } }, "localname": "EffectiveIncomeTaxRateReconciliationDeductionsDividends", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments": { "auth_ref": [ "r212", "r213", "r223" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 4.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Percent", "terseLabel": "Other" } } }, "localname": "EffectiveIncomeTaxRateReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome": { "auth_ref": [ "r212", "r213", "r223" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 2.0, "parentTag": "us-gaap_EffectiveIncomeTaxRateContinuingOperations", "weight": -1.0 } }, "lang": { "en-US": { "role": { "documentation": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.", "label": "Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent", "negatedTerseLabel": "Tax-exempt income from municipal bonds" } } }, "localname": "EffectiveIncomeTaxRateReconciliationTaxExemptIncome", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "percentItemType" }, "us-gaap_EmployeeStockOptionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "An arrangement whereby an employee is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Although there are variations, normally, after vesting, when an option is exercised, the employee-holder pays the strike value in cash to the issuing employer-entity and receives equity shares. The equity shares can be sold into the market for cash at the current market price without restriction. Options may be used to attract, retain and incentivize employees, in addition to their regular salary and other benefits.", "label": "Employee Stock Option [Member]", "terseLabel": "Stock Options" } } }, "localname": "EmployeeStockOptionMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "domainItemType" }, "us-gaap_EquityComponentDomain": { "auth_ref": [ "r165" ], "lang": { "en-US": { "role": { "documentation": "Components of equity are the parts of the total Equity balance including that which is allocated to common, preferred, treasury stock, retained earnings, etc.", "label": "Equity Component [Domain]", "terseLabel": "Equity Component [Domain]" } } }, "localname": "EquityComponentDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_EquitySecuritiesByIndustryAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by industry sector, examples include but are not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.", "label": "Industry Sector [Axis]", "terseLabel": "Category [Axis]", "verboseLabel": "Industry Sector [Axis]" } } }, "localname": "EquitySecuritiesByIndustryAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_EquitySecuritiesIndustryMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Industry sector consisting of government, private and corporate entities engaged in business activities, including but not limited to, commercial, industrial, agricultural, financial services, technology, healthcare and real estate.", "label": "Industry Sector [Domain]", "terseLabel": "Category" } } }, "localname": "EquitySecuritiesIndustryMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_EquitySecuritiesMember": { "auth_ref": [ "r2", "r7", "r146", "r281", "r306", "r386" ], "lang": { "en-US": { "role": { "documentation": "Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants.", "label": "Equity Securities [Member]", "terseLabel": "Equity securities" } } }, "localname": "EquitySecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]", "terseLabel": "Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable": { "auth_ref": [ "r244", "r245", "r246", "r247", "r253", "r254" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.", "label": "Fair Value Measurements, Recurring and Nonrecurring [Table]", "terseLabel": "Fair Value Measurements, Recurring and Nonrecurring [Table]" } } }, "localname": "FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": { "auth_ref": [ "r244", "r245", "r246" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2.", "label": "Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]", "verboseLabel": "Fair Value of Life Policy Loans" } } }, "localname": "FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock": { "auth_ref": [ "r244", "r245", "r246" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Fair Value, Assets Measured on Recurring Basis [Table Text Block]", "terseLabel": "Fair Value Hierarchy for Assets Measured at Fair Value on a Recurring Basis" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]", "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]", "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable": { "auth_ref": [ "r248", "r254" ], "lang": { "en-US": { "role": { "documentation": "Schedule of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets using significant unobservable inputs (level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include, but is not limited to: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.", "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]", "terseLabel": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock": { "auth_ref": [ "r248", "r254" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.", "label": "Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]", "terseLabel": "Asset Fair Value Measurements Using Significant Unobservable Inputs (Level 3)" } } }, "localname": "FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueByFairValueHierarchyLevelAxis": { "auth_ref": [ "r179", "r180", "r197", "r246", "r266" ], "lang": { "en-US": { "role": { "documentation": "Information by level within fair value hierarchy and fair value measured at net asset value per share as practical expedient.", "label": "Fair Value Hierarchy and NAV [Axis]", "terseLabel": "Fair Value Hierarchy and NAV [Axis]" } } }, "localname": "FairValueByFairValueHierarchyLevelAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Fair Value Disclosures [Abstract]" } } }, "localname": "FairValueDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_FairValueDisclosuresTextBlock": { "auth_ref": [ "r255" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.", "label": "Fair Value Disclosures [Text Block]", "terseLabel": "Fair Value Measurements" } } }, "localname": "FairValueDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurements" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueInputsLevel1Member": { "auth_ref": [ "r179", "r180", "r197", "r246", "r267" ], "lang": { "en-US": { "role": { "documentation": "Quoted prices in active markets for identical assets or liabilities that the reporting entity can access at the measurement date.", "label": "Fair Value, Inputs, Level 1 [Member]", "verboseLabel": "Quoted prices in active markets for identical assets (Level 1)" } } }, "localname": "FairValueInputsLevel1Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel2Member": { "auth_ref": [ "r179", "r180", "r197", "r246", "r268" ], "lang": { "en-US": { "role": { "documentation": "Inputs other than quoted prices included within level 1 that are observable for an asset or liability, either directly or indirectly, including, but not limited to, quoted prices for similar assets or liabilities in active markets, or quoted prices for identical or similar assets or liabilities in inactive markets.", "label": "Fair Value, Inputs, Level 2 [Member]", "terseLabel": "Significant other observable inputs (Level 2)" } } }, "localname": "FairValueInputsLevel2Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueInputsLevel3Member": { "auth_ref": [ "r179", "r180", "r197", "r246", "r269" ], "lang": { "en-US": { "role": { "documentation": "Unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Inputs, Level 3 [Member]", "verboseLabel": "Significant unobservable inputs (Level 3)" } } }, "localname": "FairValueInputsLevel3Member", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock": { "auth_ref": [ "r244", "r245", "r246" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of liabilities measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2.", "label": "Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]", "verboseLabel": "Fair Values of Deferred Annuities, Structured Settlements and Other Items" } } }, "localname": "FairValueLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1": { "auth_ref": [ "r249" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings", "negatedTerseLabel": "Included in net income" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss": { "auth_ref": [ "r250" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)", "negatedTerseLabel": "Included in other comprehensive income" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases": { "auth_ref": [ "r251" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases", "verboseLabel": "Purchases" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales": { "auth_ref": [ "r251" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales", "negatedLabel": "Sales" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3": { "auth_ref": [ "r252" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of transfer of financial instrument classified as an asset into level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3", "verboseLabel": "Transfers into Level 3" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3": { "auth_ref": [ "r252" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3", "negatedLabel": "Transfers out of Level 3" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue": { "auth_ref": [ "r248" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.", "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value", "periodEndLabel": "Ending balance", "periodStartLabel": "Beginning balance" } } }, "localname": "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_FairValueMeasurementsFairValueHierarchyDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Categories used to prioritize the inputs to valuation techniques to measure fair value.", "label": "Fair Value Hierarchy and NAV [Domain]", "terseLabel": "Fair Value, Measurements, Fair Value Hierarchy [Domain]" } } }, "localname": "FairValueMeasurementsFairValueHierarchyDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_FinancialInstrumentAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by type of financial instrument.", "label": "Financial Instrument [Axis]", "terseLabel": "Financial Instrument [Axis]" } } }, "localname": "FinancialInstrumentAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis": { "auth_ref": [ "r150", "r152", "r154", "r155", "r271" ], "lang": { "en-US": { "role": { "documentation": "Information by major type or class of finite-lived intangible assets.", "label": "Finite-Lived Intangible Assets by Major Class [Axis]", "terseLabel": "Finite-Lived Intangible Assets by Major Class [Axis]" } } }, "localname": "FiniteLivedIntangibleAssetsByMajorClassAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "stringItemType" }, "us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain": { "auth_ref": [ "r150", "r153" ], "lang": { "en-US": { "role": { "documentation": "The major class of finite-lived intangible asset (for example, patents, trademarks, copyrights, etc.) A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.", "label": "Finite-Lived Intangible Assets, Major Class Name [Domain]", "terseLabel": "Finite-Lived Intangible Assets, Major Class Name [Domain]" } } }, "localname": "FiniteLivedIntangibleAssetsMajorClassNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "domainItemType" }, "us-gaap_ForeignGovernmentDebtSecuritiesMember": { "auth_ref": [ "r179" ], "lang": { "en-US": { "role": { "documentation": "Debt security issued by government not domiciled in United States of America (US).", "label": "Debt Security, Government, Non-US [Member]", "terseLabel": "Foreign government" } } }, "localname": "ForeignGovernmentDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_GainLossOnInvestments": { "auth_ref": [ "r58", "r79", "r130" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_Revenues", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of realized and unrealized gain (loss) on investment.", "label": "Gain (Loss) on Investments", "terseLabel": "Investment gains and losses, net" } } }, "localname": "GainLossOnInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_GainLossOnSaleOfInvestments": { "auth_ref": [ "r79" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.", "label": "Gain (Loss) on Sale of Investments", "negatedLabel": "Investment gains and losses, net", "terseLabel": "Gain (Loss) on Sale of Investments" } } }, "localname": "GainLossOnSaleOfInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_Goodwill": { "auth_ref": [ "r147", "r148" ], "calculation": { "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails": { "order": 2.0, "parentTag": "us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.", "label": "Goodwill", "terseLabel": "Excess of purchase price paid over fair value of net assets acquired assigned to goodwill" } } }, "localname": "Goodwill", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_GrossInvestmentIncomeOperating": { "auth_ref": [ "r330" ], "calculation": { "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": 1.0, "parentTag": "us-gaap_NetInvestmentIncome", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.", "label": "Gross Investment Income, Operating", "totalLabel": "Total" } } }, "localname": "GrossInvestmentIncomeOperating", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments": { "auth_ref": [ "r89" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.", "label": "Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest", "terseLabel": "Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest", "totalLabel": "Income Before Income Taxes" } } }, "localname": "IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeStatementAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Statement [Abstract]" } } }, "localname": "IncomeStatementAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxContingencyLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Income Tax Contingency [Line Items]", "terseLabel": "Income Tax Contingency [Line Items]" } } }, "localname": "IncomeTaxContingencyLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxContingencyTable": { "auth_ref": [ "r214", "r216", "r217", "r222" ], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities and other income tax contingencies. Includes, but is not limited to, interest and penalties, reconciliation of unrecognized tax benefits, unrecognized tax benefits that would affect the effective tax rate, tax years that remain subject to examination by tax jurisdictions, and information about positions for which it is reasonably possible that amounts unrecognized will significantly change within 12 months.", "label": "Income Tax Contingency [Table]", "terseLabel": "Income Tax Contingency [Table]" } } }, "localname": "IncomeTaxContingencyTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Tax Disclosure [Abstract]" } } }, "localname": "IncomeTaxDisclosureAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxDisclosureTextBlock": { "auth_ref": [ "r227" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.", "label": "Income Tax Disclosure [Text Block]", "terseLabel": "Income Taxes" } } }, "localname": "IncomeTaxDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxes" ], "xbrltype": "textBlockItemType" }, "us-gaap_IncomeTaxExpenseBenefit": { "auth_ref": [ "r87", "r116", "r226" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_NetIncomeLoss", "weight": -1.0 }, "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.", "label": "Income Tax Expense (Benefit)", "totalLabel": "Total provision for income taxes" } } }, "localname": "IncomeTaxExpenseBenefit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Income Tax Expense (Benefit), Continuing Operations [Abstract]", "terseLabel": "Provision (Benefit) for Income Taxes" } } }, "localname": "IncomeTaxExpenseBenefitContinuingOperationsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxReconciliationDeductionsDividends": { "auth_ref": [ "r212", "r213" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 3.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deduction for dividend.", "label": "Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount", "negatedLabel": "Dividend received exclusion" } } }, "localname": "IncomeTaxReconciliationDeductionsDividends", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": { "auth_ref": [ "r86", "r212", "r213" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 1.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount", "terseLabel": "Tax at statutory rate" } } }, "localname": "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherAdjustments": { "auth_ref": [ "r212" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 4.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.", "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Amount", "terseLabel": "Other" } } }, "localname": "IncomeTaxReconciliationOtherAdjustments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxReconciliationOtherReconcilingItemsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract]", "terseLabel": "Increase (decrease) resulting from:" } } }, "localname": "IncomeTaxReconciliationOtherReconcilingItemsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "stringItemType" }, "us-gaap_IncomeTaxReconciliationTaxExemptIncome": { "auth_ref": [ "r212", "r213" ], "calculation": { "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail": { "order": 2.0, "parentTag": "us-gaap_IncomeTaxExpenseBenefit", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes.", "label": "Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount", "negatedLabel": "Tax-exempt income from municipal bonds" } } }, "localname": "IncomeTaxReconciliationTaxExemptIncome", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesDifferencesBetweenStatutoryIncomeTaxRateAndEffectiveIncomeTaxRateDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncomeTaxesPaidNet": { "auth_ref": [ "r82" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.", "label": "Income Taxes Paid, Net", "terseLabel": "Income taxes received (paid)" } } }, "localname": "IncomeTaxesPaidNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in investment income that has been earned but not yet received in cash.", "label": "Increase (Decrease) in Accrued Investment Income Receivable", "negatedLabel": "Investment income receivable" } } }, "localname": "IncreaseDecreaseInAccruedInvestmentIncomeReceivable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInDeferredIncomeTaxes": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 14.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.", "label": "Increase (Decrease) in Deferred Income Taxes", "negatedLabel": "Current income tax receivable/payable" } } }, "localname": "IncreaseDecreaseInDeferredIncomeTaxes", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.", "label": "Increase (Decrease) in Deferred Policy Acquisition Costs", "negatedLabel": "Deferred policy acquisition costs" } } }, "localname": "IncreaseDecreaseInDeferredPolicyAcquisitionCosts", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInFuturePolicyBenefitReserves": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 11.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The change in the future policy benefit reserve balance on the balance sheet.", "label": "Increase (Decrease) in Future Policy Benefit Reserves", "terseLabel": "Life policy and investment contract reserves" } } }, "localname": "IncreaseDecreaseInFuturePolicyBenefitReserves", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInInsuranceAssets": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) in the beginning and end of period in insurance industry assets which are classified as cash flows from operating activities.", "label": "Increase (Decrease) in Insurance Assets", "negatedLabel": "Premiums and reinsurance receivable" } } }, "localname": "IncreaseDecreaseInInsuranceAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 10.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in liability to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.", "label": "Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve", "terseLabel": "Loss and loss expense reserves" } } }, "localname": "IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOperatingCapitalAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Increase (Decrease) in Operating Capital [Abstract]", "terseLabel": "Changes in:" } } }, "localname": "IncreaseDecreaseInOperatingCapitalAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_IncreaseDecreaseInOperatingLiabilities": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 13.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) during the reporting period in the aggregate amount of liabilities that result from activities that generate operating income.", "label": "Increase (Decrease) in Operating Liabilities", "terseLabel": "Other liabilities" } } }, "localname": "IncreaseDecreaseInOperatingLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInOtherOperatingAssets": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) in operating assets classified as other.", "label": "Increase (Decrease) in Other Operating Assets", "negatedLabel": "Other assets" } } }, "localname": "IncreaseDecreaseInOtherOperatingAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities": { "auth_ref": [ "r78" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The increase (decrease) in property and casualty insurance liabilities balances during the period.", "label": "Increase (Decrease) in Property and Casualty Insurance Liabilities", "verboseLabel": "Net written premiums" } } }, "localname": "IncreaseDecreaseInPropertyAndCasualtyInsuranceLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncreaseDecreaseInUnearnedPremiums": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 12.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of increase (decrease) unearned premiums written. Excludes portion of unearned premiums amortized into income.", "label": "Increase (Decrease) in Unearned Premiums", "terseLabel": "Unearned premiums" } } }, "localname": "IncreaseDecreaseInUnearnedPremiums", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements": { "auth_ref": [ "r103", "r108" ], "lang": { "en-US": { "role": { "documentation": "Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.", "label": "Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements", "terseLabel": "Effect of stock-based awards (in shares)" } } }, "localname": "IncrementalCommonSharesAttributableToShareBasedPaymentArrangements", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_InsuranceCommissionsAndFees": { "auth_ref": [ "r289", "r332" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 5.0, "parentTag": "us-gaap_Revenues", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Income from agency and brokerage operations (includes sales of annuities and supplemental contracts); service charges, commissions, and fees from the sale of insurance and related services; and management fees from separate accounts, deferred annuities, and universal life products.", "label": "Insurance Commissions and Fees", "terseLabel": "Fee revenues" } } }, "localname": "InsuranceCommissionsAndFees", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestCreditedToPolicyOwnerAccount": { "auth_ref": [ "r79" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense for unpaid portion of interest credited to policy owner account.", "label": "Interest Credited to Policy Owner Account", "terseLabel": "Interest credited to contract holders'" } } }, "localname": "InterestCreditedToPolicyOwnerAccount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestExpense": { "auth_ref": [ "r51", "r115", "r258", "r261", "r290" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 4.0, "parentTag": "us-gaap_BenefitsLossesAndExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of the cost of borrowed funds accounted for as interest expense.", "label": "Interest Expense", "terseLabel": "Interest expense" } } }, "localname": "InterestExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_InterestPaidNet": { "auth_ref": [ "r73", "r75", "r82" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.", "label": "Interest Paid, Excluding Capitalized Interest, Operating Activities", "terseLabel": "Interest paid" } } }, "localname": "InterestPaidNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeDividend": { "auth_ref": [ "r56" ], "calculation": { "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": 3.0, "parentTag": "us-gaap_GrossInvestmentIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of dividend income on nonoperating securities.", "label": "Investment Income, Dividend", "terseLabel": "Dividends" } } }, "localname": "InvestmentIncomeDividend", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeInterest": { "auth_ref": [ "r57", "r114" ], "calculation": { "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": 2.0, "parentTag": "us-gaap_GrossInvestmentIncomeOperating", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.", "label": "Investment Income, Interest", "terseLabel": "Interest" } } }, "localname": "InvestmentIncomeInterest", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentIncomeInvestmentExpense": { "auth_ref": [ "r59", "r330" ], "calculation": { "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": 2.0, "parentTag": "us-gaap_NetInvestmentIncome", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expenses related to the generation of investment income.", "label": "Investment Income, Investment Expense", "terseLabel": "Less investment expenses" } } }, "localname": "InvestmentIncomeInvestmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentSecondaryCategorizationAxis": { "auth_ref": [ "r380", "r381", "r382", "r383" ], "lang": { "en-US": { "role": { "documentation": "Information by second categorization of investments, which may include, but is not limited to industry.", "label": "Investment Secondary Categorization [Axis]", "terseLabel": "Investment Secondary Categorization [Axis]" } } }, "localname": "InvestmentSecondaryCategorizationAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeAxis": { "auth_ref": [ "r377", "r379", "r384", "r385" ], "lang": { "en-US": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]", "terseLabel": "Investment Type [Axis]" } } }, "localname": "InvestmentTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentTypeCategorizationMember": { "auth_ref": [ "r377", "r379", "r384", "r385" ], "lang": { "en-US": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investments [Domain]", "terseLabel": "Investments [Domain]", "verboseLabel": "Three Primary Contributors" } } }, "localname": "InvestmentTypeCategorizationMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_Investments": { "auth_ref": [ "r323" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all investments.", "label": "Investments", "totalLabel": "Total investments" } } }, "localname": "Investments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Investments [Abstract]", "terseLabel": "Investments" } } }, "localname": "InvestmentsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_InvestmentsBySecondaryCategorizationDomain": { "auth_ref": [ "r378", "r382" ], "lang": { "en-US": { "role": { "documentation": "Investments in the \"Investment Holdings [Table]\" and the \"Summary of Investment Holdings [Table]\" are often categorized at two levels. The first categorization is the investment type. The second categorization can vary. The usual secondary categorizations are industry, country or geography.", "label": "Investments by Secondary Categorization [Domain]", "terseLabel": "Investments by Secondary Categorization [Domain]" } } }, "localname": "InvestmentsBySecondaryCategorizationDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.", "label": "Investments Classified by Contractual Maturity Date [Table Text Block]", "terseLabel": "Investments Classified by Contractual Maturity Date [Table Text Block]" } } }, "localname": "InvestmentsClassifiedByContractualMaturityDateTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_InvestmentsFairValueDisclosure": { "auth_ref": [ "r245" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.", "label": "Investments, Fair Value Disclosure", "terseLabel": "Fair value of asset" } } }, "localname": "InvestmentsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock": { "auth_ref": [ "r146", "r272", "r297", "r387" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for investments in certain debt and equity securities.", "label": "Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]", "terseLabel": "Investments" } } }, "localname": "InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/Investments" ], "xbrltype": "textBlockItemType" }, "us-gaap_InvestmentsSegmentMember": { "auth_ref": [ "r360" ], "lang": { "en-US": { "role": { "documentation": "Product line consisting of variable annuities and other forms of investment contracts.", "label": "Investments Product Line [Member]", "terseLabel": "Investments Segment" } } }, "localname": "InvestmentsSegmentMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_LesseeFinanceLeaseTermOfContract1": { "auth_ref": [ "r265" ], "lang": { "en-US": { "role": { "documentation": "Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Lessee, Finance Lease, Term of Contract", "terseLabel": "Finance lease, term of contract" } } }, "localname": "LesseeFinanceLeaseTermOfContract1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_LesseeOperatingLeaseTermOfContract": { "auth_ref": [ "r265" ], "lang": { "en-US": { "role": { "documentation": "Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.", "label": "Lessee, Operating Lease, Term of Contract", "terseLabel": "Operating lease, term of contract" } } }, "localname": "LesseeOperatingLeaseTermOfContract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "durationItemType" }, "us-gaap_Liabilities": { "auth_ref": [ "r25" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.", "label": "Liabilities", "totalLabel": "Total liabilities" } } }, "localname": "Liabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liabilities [Abstract]", "terseLabel": "Liabilities" } } }, "localname": "LiabilitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilitiesAndStockholdersEquity": { "auth_ref": [ "r20", "r279", "r315" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any.", "label": "Liabilities and Equity", "totalLabel": "Total liabilities and shareholders' equity" } } }, "localname": "LiabilitiesAndStockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesAssumed1": { "auth_ref": [ "r83", "r84", "r85" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The fair value of liabilities assumed in noncash investing or financing activities.", "label": "Liabilities Assumed", "terseLabel": "Other assets and other liabilities" } } }, "localname": "LiabilitiesAssumed1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilitiesRelatedToInvestmentContractsFairValueDisclosure": { "auth_ref": [ "r373" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of liability related to investment contracts for example, but not limited to, guaranteed investment contract or annuities.", "label": "Liabilities Related to Investment Contracts, Fair Value Disclosure", "terseLabel": "Liabilities Related to Investment Contracts, Fair Value Disclosure" } } }, "localname": "LiabilitiesRelatedToInvestmentContractsFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense": { "auth_ref": [ "r354", "r357" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date.", "label": "Liability for Claims and Claims Adjustment Expense", "periodEndLabel": "Gross loss and loss expense reserves, end of period", "periodStartLabel": "Gross loss and loss expense reserves, beginning of period", "terseLabel": "Reserve for loss and loss expenses" } } }, "localname": "LiabilityForClaimsAndClaimsAdjustmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability": { "auth_ref": [ "r354", "r357" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 1.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The amount needed to reflect the estimated ultimate cost of settling claims relating to casualty insurance insured events that have occurred on or before a particular date (ordinarily, the balance sheet date) and the amount needed to provide for the estimated ultimate cost required to investigate and settle claims relating to insured events that have occurred on or before a particular date (ordinarily, the balance sheet date), whether or not reported to the insurer at that date.", "label": "Liability for Claims and Claims Adjustment Expense, Property Casualty Liability", "terseLabel": "Loss and loss expense reserves" } } }, "localname": "LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitByProductSegmentLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Liability for Future Policy Benefit, by Product Segment [Line Items]", "terseLabel": "Liability for Future Policy Benefit, by Product Segment" } } }, "localname": "LiabilityForFuturePolicyBenefitByProductSegmentLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitByProductSegmentTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Reflects the carrying amount of and other relevant, pertinent information about the liability as of the balance sheet date for future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums by major product line segment.", "label": "Liability for Future Policy Benefit, by Product Segment [Table]", "terseLabel": "Liability for Future Policy Benefit, by Product Segment" } } }, "localname": "LiabilityForFuturePolicyBenefitByProductSegmentTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liability for Future Policy Benefits [Abstract]" } } }, "localname": "LiabilityForFuturePolicyBenefitsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpenseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract]", "terseLabel": "Insurance reserves" } } }, "localname": "LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpenseAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock": { "auth_ref": [ "r361" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for liabilities related to future policy benefits and unpaid claims and claim adjustments.", "label": "Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]", "terseLabel": "Property Casualty Loss And Loss Expenses" } } }, "localname": "LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpenses" ], "xbrltype": "textBlockItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts": { "auth_ref": [ "r324", "r352" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts.", "label": "Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts", "terseLabel": "Loss and loss expense reserves" } } }, "localname": "LiabilityForFuturePolicyBenefitsIndividualAndGroupAnnuitiesAndSupplementaryContracts", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForFuturePolicyBenefitsLife": { "auth_ref": [ "r324", "r352" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of accrued obligation to policyholders that relates to insured events under long-term life insurance contracts.", "label": "Liability for Future Policy Benefits, Life", "terseLabel": "Life policy and investment contract reserves" } } }, "localname": "LiabilityForFuturePolicyBenefitsLife", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1": { "auth_ref": [ "r356" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": 1.0, "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in the current period and related claims settlement costs.", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year", "terseLabel": "Current accident year" } } }, "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1": { "auth_ref": [ "r356" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": 2.0, "parentTag": "us-gaap_PaymentsForLossesAndLossAdjustmentExpense", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of payments to settle claims incurred in prior periods and related claims settlement costs.", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years", "terseLabel": "Prior accident years" } } }, "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1": { "auth_ref": [ "r355" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred and costs incurred in the claim settlement process.", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims", "totalLabel": "Total incurred" } } }, "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet": { "auth_ref": [ "r302", "r354", "r357" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Net", "periodEndLabel": "Net loss and loss expense reserves, end of period", "periodStartLabel": "Net loss and loss expense reserves, beginning of period" } } }, "localname": "LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LifeInsuranceSegmentMember": { "auth_ref": [ "r340", "r353", "r360" ], "lang": { "en-US": { "role": { "documentation": "Product line consisting of insurance policies providing death benefits.", "label": "Life Insurance Product Line [Member]", "verboseLabel": "Life Insurance Segment" } } }, "localname": "LifeInsuranceSegmentMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_LoansAndLeasesReceivableNetReportedAmount": { "auth_ref": [ "r125", "r284" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.", "label": "Loans and Leases Receivable, Net Amount", "terseLabel": "Finance receivable", "verboseLabel": "Loans and Leases Receivable, Net Amount" } } }, "localname": "LoansAndLeasesReceivableNetReportedAmount", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LoansReceivableFairValueDisclosure": { "auth_ref": [ "r127" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.", "label": "Loans Receivable, Fair Value Disclosure", "verboseLabel": "Fair value of life policy loans" } } }, "localname": "LoansReceivableFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebt": { "auth_ref": [ "r9", "r164", "r278", "r312" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.", "label": "Long-term Debt", "verboseLabel": "Book value" } } }, "localname": "LongTermDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsSummaryOfBookValueAndPrincipalAmountsOfLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtAndCapitalLeaseObligations": { "auth_ref": [ "r9" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.", "label": "Long-term Debt and Capital Lease Obligations", "terseLabel": "Long-term debt and lease obligations" } } }, "localname": "LongTermDebtAndCapitalLeaseObligations", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_LongTermDebtFairValue": { "auth_ref": [], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.", "label": "Long-term Debt, Fair Value", "verboseLabel": "Fair value of senior debt" } } }, "localname": "LongTermDebtFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.", "label": "Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]", "terseLabel": "Movement Analysis of Deferred Policy Acquisition Costs" } } }, "localname": "MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivities": { "auth_ref": [ "r74" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.", "label": "Net Cash Provided by (Used in) Financing Activities", "totalLabel": "Net cash used in financing activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Financing Activities [Abstract]", "terseLabel": "Cash Flows From Financing Activities" } } }, "localname": "NetCashProvidedByUsedInFinancingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivities": { "auth_ref": [ "r74" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.", "label": "Net Cash Provided by (Used in) Investing Activities", "totalLabel": "Net cash used in investing activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Investing Activities [Abstract]", "terseLabel": "Cash Flows From Investing Activities" } } }, "localname": "NetCashProvidedByUsedInInvestingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivities": { "auth_ref": [ "r74", "r77", "r80" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease", "weight": 1.0 } }, "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.", "label": "Net Cash Provided by (Used in) Operating Activities", "totalLabel": "Net cash provided by operating activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Cash Provided by (Used in) Operating Activities [Abstract]", "terseLabel": "Cash Flows From Operating Activities" } } }, "localname": "NetCashProvidedByUsedInOperatingActivitiesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_NetIncomeLoss": { "auth_ref": [ "r44", "r47", "r52", "r80", "r108", "r287", "r326" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 15.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 }, "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": 1.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 }, "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.", "label": "Net Income (Loss) Attributable to Parent", "terseLabel": "Net Income", "totalLabel": "Net Income", "verboseLabel": "Net income\u2014basic and diluted" } } }, "localname": "NetIncomeLoss", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity", "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetIncomeLossAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Income (Loss) Attributable to Parent [Abstract]", "terseLabel": "Numerator:" } } }, "localname": "NetIncomeLossAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_NetInvestmentIncome": { "auth_ref": [ "r328" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_Revenues", "weight": 1.0 }, "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.", "label": "Net Investment Income", "terseLabel": "Investment income, net of expenses", "totalLabel": "Total" } } }, "localname": "NetInvestmentIncome", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_NetInvestmentIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Net Investment Income [Abstract]", "terseLabel": "Investment income:" } } }, "localname": "NetInvestmentIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "New Accounting Pronouncements or Change in Accounting Principle [Line Items]", "terseLabel": "New Accounting Pronouncements or Change in Accounting Principle" } } }, "localname": "NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable": { "auth_ref": [ "r93", "r95", "r96" ], "lang": { "en-US": { "role": { "documentation": "Summarization of the changes in an accounting principle or a new accounting pronouncement, including the line items affected by the change and the financial effects of the change on those particular line items.", "label": "New Accounting Pronouncements or Change in Accounting Principle [Table]", "terseLabel": "New Accounting Pronouncements or Change in Accounting Principle [Table]" } } }, "localname": "NewAccountingPronouncementsOrChangeInAccountingPrincipleTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "stringItemType" }, "us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.", "label": "New Accounting Pronouncements, Policy [Policy Text Block]", "terseLabel": "Adopted Accounting Updates and Pending Accounting Updates" } } }, "localname": "NewAccountingPronouncementsPolicyPolicyTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesPendingAccountingUpdatesPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_NotesPayable": { "auth_ref": [ "r9", "r278", "r312" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.", "label": "Notes Payable", "terseLabel": "Note payable" } } }, "localname": "NotesPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_NotesPayableFairValueDisclosure": { "auth_ref": [ "r24" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Fair value portion of notes payable.", "label": "Notes Payable, Fair Value Disclosure", "terseLabel": "Fair value of note payable" } } }, "localname": "NotesPayableFairValueDisclosure", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_NumberOfReportableSegments": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.", "label": "Number of Reportable Segments", "terseLabel": "Number of Reportable Segments" } } }, "localname": "NumberOfReportableSegments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationNarrativeDetails" ], "xbrltype": "integerItemType" }, "us-gaap_OperatingLeaseLiability": { "auth_ref": [ "r264" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Present value of lessee's discounted obligation for lease payments from operating lease.", "label": "Operating Lease, Liability", "terseLabel": "Operating lease liability recognized" } } }, "localname": "OperatingLeaseLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLeaseRightOfUseAsset": { "auth_ref": [ "r263" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of lessee's right to use underlying asset under operating lease.", "label": "Operating Lease, Right-of-Use Asset", "terseLabel": "Right of use asset recognized" } } }, "localname": "OperatingLeaseRightOfUseAsset", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingLossCarryforwards": { "auth_ref": [ "r219" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.", "label": "Operating Loss Carryforwards", "terseLabel": "Operating Loss Carryforwards" } } }, "localname": "OperatingLossCarryforwards", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OperatingSegmentsMember": { "auth_ref": [ "r113", "r121" ], "lang": { "en-US": { "role": { "documentation": "Identifies components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Operating Segments [Member]", "verboseLabel": "Operating Segments" } } }, "localname": "OperatingSegmentsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_OtherAssets": { "auth_ref": [ "r5", "r274", "r308" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 10.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of assets classified as other.", "label": "Other Assets", "terseLabel": "Other assets" } } }, "localname": "OtherAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax": { "auth_ref": [ "r35", "r39", "r186" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.", "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax", "terseLabel": "Amortization of pension actuarial loss and prior service cost, net of tax of $0, $0, $0 and $0, respectively" } } }, "localname": "OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax": { "auth_ref": [ "r42" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), before Reclassifications, before Tax", "terseLabel": "Other comprehensive income before reclassification, before tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": { "auth_ref": [ "r42", "r50" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax, before reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), before Reclassifications, Net of Tax", "totalLabel": "Other comprehensive income before reclassification, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax": { "auth_ref": [ "r40", "r225" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss) before Reclassifications, Tax", "terseLabel": "Other comprehensive income before reclassification, tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeReclassificationsTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Other Comprehensive Income (Loss), before Tax [Abstract]", "terseLabel": "Accumulated Other Comprehensive Income Loss Before Tax [Abstract]" } } }, "localname": "OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent": { "auth_ref": [ "r236", "r237", "r238" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of other comprehensive income (loss) attributable to parent entity.", "label": "Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent", "terseLabel": "Effect on other comprehensive income, before tax" } } }, "localname": "OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTax": { "auth_ref": [ "r45", "r48", "r50", "r165" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": 2.0, "parentTag": "us-gaap_ComprehensiveIncomeNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax and reclassification adjustments of other comprehensive income (loss).", "label": "Other Comprehensive Income (Loss), Net of Tax", "totalLabel": "Other comprehensive income (loss)", "verboseLabel": "Other comprehensive income (loss)" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent": { "auth_ref": [ "r45", "r48", "r236", "r237", "r238" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of other comprehensive income (loss) attributable to parent entity.", "label": "Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent", "terseLabel": "Effect on other comprehensive income, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax": { "auth_ref": [ "r37", "r39" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax", "negatedTerseLabel": "Change in pension obligations, before tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax": { "auth_ref": [ "r37", "r39" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax", "negatedTotalLabel": "Change in pension obligations, net of tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax": { "auth_ref": [ "r37", "r40", "r236" ], "calculation": { "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails": { "order": 2.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.", "label": "Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax", "negatedTerseLabel": "Change in pension obligations, tax" } } }, "localname": "OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1": { "auth_ref": [ "r236", "r237", "r238" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.", "label": "Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent", "terseLabel": "Effect on other comprehensive income, tax" } } }, "localname": "OtherComprehensiveIncomeLossTaxPortionAttributableToParent1", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax": { "auth_ref": [ "r32", "r39", "r145" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome": { "order": 1.0, "parentTag": "us-gaap_OtherComprehensiveIncomeLossNetOfTax", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.", "label": "Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax", "terseLabel": "Change in unrealized gains on investments, net of tax (benefit) of $43, ($18), $93 and ($64), respectively" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax": { "auth_ref": [ "r33", "r40" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of tax expense (benefit) before reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.", "label": "Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax", "terseLabel": "Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax" } } }, "localname": "OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherCostAndExpenseOperating": { "auth_ref": [ "r55" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 3.0, "parentTag": "us-gaap_BenefitsLossesAndExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.", "label": "Other Cost and Expense, Operating", "verboseLabel": "Other operating expenses" } } }, "localname": "OtherCostAndExpenseOperating", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherIncome": { "auth_ref": [ "r332" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 4.0, "parentTag": "us-gaap_Revenues", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of revenue and income classified as other.", "label": "Other Income", "terseLabel": "Other revenues" } } }, "localname": "OtherIncome", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherInvestmentNotReadilyMarketableFairValue": { "auth_ref": [ "r273" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Value of the other investment not readily marketable determined by management based upon fair value methods, including pricing of similar securities and valuation techniques, that was used to record the investment for financial reporting purposes.", "label": "Other Investment Not Readily Marketable, Fair Value", "terseLabel": "Top Hat savings plan mutual funds and common equity (included in Other assets)" } } }, "localname": "OtherInvestmentNotReadilyMarketableFairValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherInvestments": { "auth_ref": [ "r22", "r322" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Investments", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of investments classified as other.", "label": "Other Investments", "terseLabel": "Other invested assets" } } }, "localname": "OtherInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_OtherLiabilities": { "auth_ref": [ "r282" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 4.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liabilities classified as other.", "label": "Other Liabilities", "terseLabel": "Other liabilities" } } }, "localname": "OtherLiabilities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForLossesAndLossAdjustmentExpense": { "auth_ref": [ "r76", "r356" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": null, "parentTag": null, "root": true, "weight": null } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process.", "label": "Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid", "totalLabel": "Total paid" } } }, "localname": "PaymentsForLossesAndLossAdjustmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForProceedsFromOtherInvestingActivities": { "auth_ref": [ "r64", "r68", "r91" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 9.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash (inflow) outflow from investing activities classified as other.", "label": "Payments for (Proceeds from) Other Investing Activities", "negatedLabel": "Change in other invested assets, net" } } }, "localname": "PaymentsForProceedsFromOtherInvestingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsForRepurchaseOfCommonStock": { "auth_ref": [ "r71" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow to reacquire common stock during the period.", "label": "Payments for Repurchase of Common Stock", "negatedTerseLabel": "Shares acquired - share repurchase authorization" } } }, "localname": "PaymentsForRepurchaseOfCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsOfDividendsCommonStock": { "auth_ref": [ "r71" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.", "label": "Payments of Ordinary Dividends, Common Stock", "negatedLabel": "Payment of cash dividends to shareholders" } } }, "localname": "PaymentsOfDividendsCommonStock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r61", "r65", "r129" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 4.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Payments to Acquire Debt Securities, Available-for-sale", "negatedLabel": "Purchase of fixed maturities" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity": { "auth_ref": [ "r66", "r129" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities.", "label": "Payments to Acquire Available-for-sale Securities, Equity", "negatedLabel": "Purchase of equity securities" } } }, "localname": "PaymentsToAcquireAvailableForSaleSecuritiesEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireBusinessesGross": { "auth_ref": [ "r66", "r234" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.", "label": "Payments to Acquire Businesses, Gross", "terseLabel": "Aggregate consideration paid" } } }, "localname": "PaymentsToAcquireBusinessesGross", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquireFinanceReceivables": { "auth_ref": [ "r68" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for the purchase of amounts due from customers, clients, lessees, borrowers, or others under the terms of its agreements therewith.", "label": "Payments to Acquire Finance Receivables", "negatedLabel": "Investment in finance receivables" } } }, "localname": "PaymentsToAcquireFinanceReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PaymentsToAcquirePropertyPlantAndEquipment": { "auth_ref": [ "r67" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.", "label": "Payments to Acquire Property, Plant, and Equipment", "negatedLabel": "Investment in buildings and equipment" } } }, "localname": "PaymentsToAcquirePropertyPlantAndEquipment", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock": { "auth_ref": [ "r199" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for pension and other postretirement benefits.", "label": "Pension and Other Postretirement Benefits Disclosure [Text Block]", "terseLabel": "Employee Retirement Benefits" } } }, "localname": "PensionAndOtherPostretirementBenefitsDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefits" ], "xbrltype": "textBlockItemType" }, "us-gaap_PensionContributions": { "auth_ref": [ "r76" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.", "label": "Payment for Pension Benefits", "terseLabel": "Pension contributions" } } }, "localname": "PensionContributions", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PensionPlansDefinedBenefitMember": { "auth_ref": [ "r175", "r188", "r189", "r198" ], "lang": { "en-US": { "role": { "documentation": "Plan designed to provide participant with pension benefits. Includes, but is not limited to, defined benefit and defined contribution plans. Excludes other postretirement benefits.", "label": "Pension Plan [Member]", "terseLabel": "Qualified Pension Plans" } } }, "localname": "PensionPlansDefinedBenefitMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PolicyLoansMember": { "auth_ref": [ "r307", "r372" ], "lang": { "en-US": { "role": { "documentation": "Loan issued by an insurance company, collateralized by the cash value of the borrower's life insurance policy.", "label": "Policy Loans [Member]", "terseLabel": "Life Policy Loans" } } }, "localname": "PolicyLoansMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValuesOfNotePayableAndLongTermDebtDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PolicyholderBenefitsAndClaimsIncurredGross": { "auth_ref": [ "r333" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, before effect of policies assumed or ceded, of expense related to provision for policy benefits and costs incurred.", "label": "Policyholder Benefits and Claims Incurred, Direct", "terseLabel": "Direct contract holders' benefits incurred", "verboseLabel": "Direct incurred loss and loss expenses" } } }, "localname": "PolicyholderBenefitsAndClaimsIncurredGross", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PolicyholderBenefitsAndClaimsIncurredNet": { "auth_ref": [ "r300", "r333" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_BenefitsLossesAndExpenses", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.", "label": "Policyholder Benefits and Claims Incurred, Net", "terseLabel": "Insurance losses and contract holders' benefits", "verboseLabel": "Incurred loss and loss expenses" } } }, "localname": "PolicyholderBenefitsAndClaimsIncurredNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PreferredStockMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Preferred shares may provide a preferential dividend to the dividend on common stock and may take precedence over common stock in the event of a liquidation. Preferred shares typically represent an ownership interest in the company.", "label": "Preferred Stock [Member]", "terseLabel": "Nonredeemable preferred equities", "verboseLabel": "Preferred Equities" } } }, "localname": "PreferredStockMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PremiumsEarnedNet": { "auth_ref": [ "r286", "r325", "r338", "r369" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 1.0, "parentTag": "us-gaap_Revenues", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned.", "label": "Premiums Earned, Net", "terseLabel": "Earned premiums" } } }, "localname": "PremiumsEarnedNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PremiumsEarnedNetLife": { "auth_ref": [ "r325", "r362", "r363", "r367" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after premiums ceded to other entities and premiums assumed by the entity, of life premiums earned.", "label": "Premiums Earned, Net, Life", "terseLabel": "Earned premiums" } } }, "localname": "PremiumsEarnedNetLife", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_PremiumsEarnedNetPropertyAndCasualty": { "auth_ref": [ "r325", "r362", "r363", "r364" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount, after premiums ceded to other entities and premiums assumed by the entity, of property and casualty premiums earned.", "label": "Premiums Earned, Net, Property and Casualty", "terseLabel": "Earned premiums" } } }, "localname": "PremiumsEarnedNetPropertyAndCasualty", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_PremiumsReceivableAtCarryingValue": { "auth_ref": [ "r320" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The carrying amount as of the balance sheet date due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, net of the allowance for doubtful accounts.", "label": "Premiums Receivable, Net", "terseLabel": "Premiums receivable" } } }, "localname": "PremiumsReceivableAtCarryingValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_PremiumsWrittenNetConsolidatedAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Premiums Written, Net [Abstract]" } } }, "localname": "PremiumsWrittenNetConsolidatedAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_PrepaidReinsurancePremiums": { "auth_ref": [ "r351", "r375" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 7.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The unexpired portion of premiums ceded on policies in force as of the balance sheet date.", "label": "Prepaid Reinsurance Premiums", "terseLabel": "Prepaid reinsurance premiums" } } }, "localname": "PrepaidReinsurancePremiums", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities": { "auth_ref": [ "r61", "r62", "r129" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 2.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale", "terseLabel": "Call or maturity of fixed maturities" } } }, "localname": "ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromPaymentsForOtherFinancingActivities": { "auth_ref": [ "r70", "r72", "r91" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 6.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from financing activities classified as other.", "label": "Proceeds from (Payments for) Other Financing Activities", "terseLabel": "Other" } } }, "localname": "ProceedsFromPaymentsForOtherFinancingActivities", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromRepaymentsOfNotesPayable": { "auth_ref": [ "r91" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 7.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow (outflow) from long-term debt supported by a written promise to pay an obligation.", "label": "Proceeds from (Repayments of) Notes Payable", "terseLabel": "Proceeds from (Repayments of) Notes Payable" } } }, "localname": "ProceedsFromRepaymentsOfNotesPayable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleAndCollectionOfFinanceReceivables": { "auth_ref": [ "r62" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 8.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow associated with the sale or collection of receivables arising from the financing of goods and services.", "label": "Proceeds from Sale and Collection of Finance Receivables", "terseLabel": "Collection of finance receivables" } } }, "localname": "ProceedsFromSaleAndCollectionOfFinanceReceivables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt": { "auth_ref": [ "r61", "r62", "r129" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 1.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).", "label": "Proceeds from Sale of Debt Securities, Available-for-sale", "terseLabel": "Sale of fixed maturities" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesDebt", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity": { "auth_ref": [ "r63", "r129" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInInvestingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The cash inflow associated with the sale of equity securities classified as available-for-sale securities.", "label": "Proceeds from Sale of Available-for-sale Securities, Equity", "terseLabel": "Sale of equity securities" } } }, "localname": "ProceedsFromSaleOfAvailableForSaleSecuritiesEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProceedsFromStockOptionsExercised": { "auth_ref": [ "r69", "r207" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.", "label": "Proceeds from Stock Options Exercised", "terseLabel": "Proceeds from stock options exercised" } } }, "localname": "ProceedsFromStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember": { "auth_ref": [ "r360" ], "lang": { "en-US": { "role": { "documentation": "Product line consisting of insurance provided to policyholders on commercial properties, which covers property-related losses including, but not limited to, damage, theft or legal liability for personal injury.", "label": "Property and Casualty, Commercial Insurance Product Line [Member]", "terseLabel": "Commercial Lines" } } }, "localname": "PropertyAndCasualtyCommercialInsuranceProductLineMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember": { "auth_ref": [ "r360" ], "lang": { "en-US": { "role": { "documentation": "Product line consisting of insurance provided to individuals, which covers property-related losses including, but not limited to, damage, theft or legal liability for personal injury.", "label": "Property and Casualty, Personal Insurance Product Line [Member]", "terseLabel": "Personal Lines" } } }, "localname": "PropertyAndCasualtyPersonalInsuranceProductLineMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_PropertyPlantAndEquipmentNet": { "auth_ref": [ "r3", "r4", "r157", "r318" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 9.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.", "label": "Property, Plant and Equipment, Net", "terseLabel": "Land, building and equipment, net, for company use (accumulated depreciation: 2019\u2014$267; 2018\u2014$265)" } } }, "localname": "PropertyPlantAndEquipmentNet", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ProvisionForOtherCreditLosses": { "auth_ref": [ "r78", "r285" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of expense related to credit loss from transactions other than loan and lease transactions.", "label": "Provision for Other Credit Losses", "terseLabel": "Provision for Other Credit Losses" } } }, "localname": "ProvisionForOtherCreditLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_RealizedInvestmentGainsLosses": { "auth_ref": [ "r331" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.", "label": "Realized Investment Gains (Losses)", "terseLabel": "Investment gains and losses, net" } } }, "localname": "RealizedInvestmentGainsLosses", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_RealizedInvestmentGainsLossesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Realized Investment Gains (Losses) [Abstract]", "verboseLabel": "Investment gains and losses, net:" } } }, "localname": "RealizedInvestmentGainsLossesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax": { "auth_ref": [ "r42", "r43" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount before tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax", "negatedTerseLabel": "Reclassification adjustment, before tax" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax": { "auth_ref": [ "r42", "r43", "r50" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount after tax of reclassification adjustments of other comprehensive income (loss).", "label": "Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax", "negatedTerseLabel": "Reclassification adjustment, net of tax" } } }, "localname": "ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about items reclassified out of accumulated other comprehensive income (loss).", "label": "Reclassification out of Accumulated Other Comprehensive Income [Table]", "terseLabel": "Reclassification Out of Accumulated Other Comprehensive Income [Table]" } } }, "localname": "ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails" ], "xbrltype": "stringItemType" }, "us-gaap_ReinsuranceDisclosuresAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Reinsurance Disclosures [Abstract]" } } }, "localname": "ReinsuranceDisclosuresAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed": { "auth_ref": [ "r300" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount of policy benefits and costs incurred for policies assumed.", "label": "Policyholder Benefits and Claims Incurred, Assumed", "terseLabel": "Assumed incurred loss and loss expenses", "verboseLabel": "Policyholder Benefits and Claims Incurred, Assumed" } } }, "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded": { "auth_ref": [ "r300" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of reduction of provision for policy benefits and costs incurred for policies ceded.", "label": "Policyholder Benefits and Claims Incurred, Ceded", "terseLabel": "Ceded incurred loss and loss expenses", "verboseLabel": "Ceded contract holders' benefits incurred" } } }, "localname": "ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments": { "auth_ref": [ "r301", "r350", "r354", "r357" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer.", "label": "Reinsurance Recoverable for Unpaid Claims and Claims Adjustments", "periodEndLabel": "Plus reinsurance recoverable", "periodStartLabel": "Less reinsurance recoverable" } } }, "localname": "ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReinsuranceRecoverables": { "auth_ref": [ "r301", "r321", "r349" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 6.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.", "label": "Reinsurance Recoverables, Including Reinsurance Premium Paid", "terseLabel": "Reinsurance recoverable" } } }, "localname": "ReinsuranceRecoverables", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ReinsuranceTextBlock": { "auth_ref": [ "r376" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure pertaining to the existence, magnitude and information about insurance that has been ceded to or assumed from another insurance company, including the methodologies and assumptions used in determining recorded amounts.", "label": "Reinsurance [Text Block]", "terseLabel": "Reinsurance" } } }, "localname": "ReinsuranceTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/Reinsurance" ], "xbrltype": "textBlockItemType" }, "us-gaap_RestrictedStockUnitsRSUMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Share instrument which is convertible to stock or an equivalent amount of cash, after a specified period of time or when specified performance conditions are met.", "label": "Restricted Stock Units (RSUs) [Member]", "terseLabel": "Nonvested shares" } } }, "localname": "RestrictedStockUnitsRSUMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "domainItemType" }, "us-gaap_RetainedEarningsAccumulatedDeficit": { "auth_ref": [ "r17", "r170", "r314" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_StockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings (Accumulated Deficit)", "terseLabel": "Retained earnings" } } }, "localname": "RetainedEarningsAccumulatedDeficit", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_RetainedEarningsMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "The cumulative amount of the reporting entity's undistributed earnings or deficit.", "label": "Retained Earnings [Member]", "terseLabel": "Retained Earnings" } } }, "localname": "RetainedEarningsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_RetirementPlanTypeAxis": { "auth_ref": [ "r175", "r176", "r188", "r189", "r198" ], "lang": { "en-US": { "role": { "documentation": "Information by type of retirement benefit plan. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Axis]", "terseLabel": "Retirement Plan Type [Axis]" } } }, "localname": "RetirementPlanTypeAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "stringItemType" }, "us-gaap_RetirementPlanTypeDomain": { "auth_ref": [ "r175", "r176", "r188", "r189", "r198" ], "lang": { "en-US": { "role": { "documentation": "Type of plan designed to provide participants with retirement benefits. Includes, but is not limited to, retirement benefit arrangement for defined benefit pension and other postretirement plans, retirement benefit arrangement for defined contribution pension and other postretirement plans, and special and contractual termination benefits payable upon retirement.", "label": "Retirement Plan Type [Domain]", "terseLabel": "Retirement Plan Type [Domain]" } } }, "localname": "RetirementPlanTypeDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "domainItemType" }, "us-gaap_Revenues": { "auth_ref": [ "r54", "r112", "r113", "r120" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome": { "order": 2.0, "parentTag": "us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).", "label": "Revenues", "terseLabel": "Total revenues", "totalLabel": "Total revenues" } } }, "localname": "Revenues", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_RevenuesAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Revenues [Abstract]", "terseLabel": "Revenues" } } }, "localname": "RevenuesAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfIncome" ], "xbrltype": "stringItemType" }, "us-gaap_ScenarioUnspecifiedDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Any scenario, that is, the particular reporting scenario is left unspecified. Scenarios distinguish among different kinds of business reporting facts, as for example actual versus budgeted figures.", "label": "Scenario, Unspecified [Domain]", "terseLabel": "Scenario, Unspecified" } } }, "localname": "ScenarioUnspecifiedDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "domainItemType" }, "us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock": { "auth_ref": [ "r42" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the components of accumulated other comprehensive income (loss).", "label": "Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]", "terseLabel": "Schedule of Accumulated Other Comprehensive Income (Loss)" } } }, "localname": "ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Debt Securities, Available-for-sale [Line Items]", "terseLabel": "Debt Securities, Available-for-sale [Line Items]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfAvailableForSaleSecuritiesTable": { "auth_ref": [ "r135", "r140", "r141", "r142", "r143", "r144", "r291", "r296" ], "lang": { "en-US": { "role": { "documentation": "Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.", "label": "Schedule of Available-for-sale Securities [Table]", "terseLabel": "Schedule of Available-for-sale Securities [Table]" } } }, "localname": "ScheduleOfAvailableForSaleSecuritiesTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable": { "auth_ref": [ "r228", "r229" ], "lang": { "en-US": { "role": { "documentation": "Schedule reflecting each material business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities.", "label": "Schedule of Business Acquisitions, by Acquisition [Table]", "terseLabel": "Schedule of Business Acquisitions, by Acquisition [Table]" } } }, "localname": "ScheduleOfBusinessAcquisitionsByAcquisitionTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionNarrativeDetails", "http://www.cinfin.com/role/AcquisitionScheduleOfAssetsAndLiabilitiesAcquiredDetails", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements.", "label": "Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]", "terseLabel": "Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]" } } }, "localname": "ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable": { "auth_ref": [ "r188", "r189", "r190", "r191", "r197" ], "lang": { "en-US": { "role": { "documentation": "Disclosures about an individual defined benefit pension plan or an other postretirement defined benefit plan. It may be appropriate to group certain similar plans. Also includes schedule for fair value of plan assets by major categories of plan assets by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), Significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).", "label": "Schedule of Defined Benefit Plans Disclosures [Table]", "terseLabel": "Schedule of Defined Benefit Plans Disclosures [Table]" } } }, "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsComponentsOfNetPeriodicCostsForQualifiedAndSupplementalPensionPlansDetail", "http://www.cinfin.com/role/EmployeeRetirementBenefitsDefinedContributionPlanDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock": { "auth_ref": [ "r188", "r189", "r190", "r191", "r197" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans.", "label": "Schedule of Defined Benefit Plans Disclosures [Table Text Block]", "terseLabel": "Schedule of Defined Benefit Plans Disclosures" } } }, "localname": "ScheduleOfDefinedBenefitPlansDisclosuresTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/EmployeeRetirementBenefitsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock": { "auth_ref": [ "r108" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.", "label": "Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]", "terseLabel": "Calculations For Basic And Diluted Earnings Per Share" } } }, "localname": "ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock": { "auth_ref": [ "r212" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.", "label": "Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]", "terseLabel": "Differences Between Statutory Income Tax Rate And Effective Income Tax Rate" } } }, "localname": "ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Gain (Loss) on Securities [Line Items]", "terseLabel": "Gain (Loss) on Securities [Line Items]" } } }, "localname": "ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfGainLossOnInvestmentsTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Disclosure of information about realized and unrealized gain (loss) on investment in security.", "label": "Schedule of Gain (Loss) on Securities [Table]", "terseLabel": "Schedule of Gain (Loss) on Securities [Table]" } } }, "localname": "ScheduleOfGainLossOnInvestmentsTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsAdditionalInformationDetail", "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock": { "auth_ref": [ "r303" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for the present values of future benefits to be paid to or on behalf of policyholders and related expenses less the present value of future net premiums using assumptions such as estimates of expected investment yields, mortality, morbidity, terminations and expenses, applicable at the time the insurance contracts are made and unpaid claim costs relating to insurance contracts including estimates of costs relating to incurred but not reported claims based on the estimated ultimate cost of settling the claims (including effects of inflation and other societal and economic factors), using past experience adjusted for current trends and any other factors that would modify past experience by element such as business segment, country and interest rate range.", "label": "Schedule of Liability for Future Policy Benefits, by Product Segment [Table Text Block]", "terseLabel": "Reserve For Losses Loss Adjustment Expenses Table" } } }, "localname": "ScheduleOfLiabilityForFuturePolicyBenefitsByProductSegmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/LifePolicyAndInvestmentContractReservesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense": { "auth_ref": [ "r358" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the activity in the reserve for settling insured claims and expenses incurred in the claims settlement process for the period. The estimated liability includes the amount of money that will be required for future payments of (a) claims that have been reported to the insurer, (b) claims related to insured events that have occurred but that have not been reported to the insurer as of the date the liability is estimated, and (c) claim adjustment expenses. Claim adjustment expenses include costs incurred in the claim settlement process such as legal fees; outside adjuster fees; and costs to record, process, and adjust claims.", "label": "Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]", "terseLabel": "Consolidated Property Casualty Loss And Loss Expense Reserves" } } }, "localname": "ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock": { "auth_ref": [ "r232" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree.", "label": "Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]", "terseLabel": "The fair value of assets acquired, liability assumed and the allocation of the purchase price" } } }, "localname": "ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AcquisitionAcquisitionsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable": { "auth_ref": [ "r111", "r117", "r118", "r119", "r149" ], "lang": { "en-US": { "role": { "documentation": "A table disclosing the profit or loss and total assets for each reportable segment of the entity. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.", "label": "Schedule of Segment Reporting Information, by Segment [Table]", "terseLabel": "Schedule of Segment Reporting Information, by Segment [Table]" } } }, "localname": "ScheduleOfSegmentReportingInformationBySegmentTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock": { "auth_ref": [ "r111", "r117", "r118", "r119", "r149" ], "lang": { "en-US": { "role": { "documentation": "Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.", "label": "Schedule of Segment Reporting Information, by Segment [Table Text Block]", "terseLabel": "Segment Information" } } }, "localname": "ScheduleOfSegmentReportingInformationBySegmentTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock": { "auth_ref": [ "r141" ], "lang": { "en-US": { "role": { "documentation": "For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).", "label": "Schedule of Unrealized Loss on Investments [Table Text Block]", "terseLabel": "Fair Values And Unrealized Losses by Investment Category And By The Duration Of The Securities' Continuous Unrealized Loss Position" } } }, "localname": "ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsTables" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Components of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Segments [Domain]", "terseLabel": "Segments [Domain]" } } }, "localname": "SegmentDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_SegmentReportingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Segment Reporting [Abstract]" } } }, "localname": "SegmentReportingAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_SegmentReportingDisclosureTextBlock": { "auth_ref": [ "r124" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.", "label": "Segment Reporting Disclosure [Text Block]", "terseLabel": "Segment Information" } } }, "localname": "SegmentReportingDisclosureTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformation" ], "xbrltype": "textBlockItemType" }, "us-gaap_SegmentReportingInformationLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Segment Reporting Information [Line Items]", "terseLabel": "Segment Reporting Information" } } }, "localname": "SegmentReportingInformationLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_SeparateAccountAssets": { "auth_ref": [ "r309", "r370", "r376" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 11.0, "parentTag": "us-gaap_Assets", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The fair value of the assets held by the Entity for the benefit of separate account policyholders.", "label": "Separate Account Assets", "terseLabel": "Separate accounts" } } }, "localname": "SeparateAccountAssets", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_SeparateAccountsLiability": { "auth_ref": [ "r313", "r370", "r371", "r376" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 8.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of liability for variable contracts that meet specified criteria that are backed by assets held in separate accounts and carried at the fair value of those assets.", "label": "Separate Accounts, Liability", "terseLabel": "Separate accounts" } } }, "localname": "SeparateAccountsLiability", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensation": { "auth_ref": [ "r78" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 3.0, "parentTag": "us-gaap_NetCashProvidedByUsedInOperatingActivities", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.", "label": "Share-based Compensation", "terseLabel": "Share-based compensation" } } }, "localname": "ShareBasedCompensation", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" }, "us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain": { "auth_ref": [ "r201", "r204" ], "lang": { "en-US": { "role": { "documentation": "Equity-based compensation award.", "label": "Equity Award [Domain]", "terseLabel": "Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain]" } } }, "localname": "ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "domainItemType" }, "us-gaap_SignificantAccountingPoliciesTextBlock": { "auth_ref": [ "r92" ], "lang": { "en-US": { "role": { "documentation": "The entire disclosure for all significant accounting policies of the reporting entity.", "label": "Significant Accounting Policies [Text Block]", "terseLabel": "Accounting Policies" } } }, "localname": "SignificantAccountingPoliciesTextBlock", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPolicies" ], "xbrltype": "textBlockItemType" }, "us-gaap_StatementBusinessSegmentsAxis": { "auth_ref": [ "r0", "r117", "r149", "r158", "r159", "r160", "r359" ], "lang": { "en-US": { "role": { "documentation": "Information by business segments.", "label": "Segments [Axis]", "terseLabel": "Segments [Axis]" } } }, "localname": "StatementBusinessSegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/DeferredAcquisitionCostsDeferredPolicyAcquisitionCostsAndAssetReconciliationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/ReinsuranceConsolidatedPropertyCasualtyInsuranceAssumedAndCededBusinessDetails", "http://www.cinfin.com/role/ReinsuranceLifeInsuranceCededBusinessDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_StatementClassOfStockAxis": { "auth_ref": [ "r12", "r13", "r14", "r165" ], "lang": { "en-US": { "role": { "documentation": "Information by the different classes of stock of the entity.", "label": "Class of Stock [Axis]", "terseLabel": "Class of Stock [Axis]" } } }, "localname": "StatementClassOfStockAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_StatementEquityComponentsAxis": { "auth_ref": [ "r31", "r165" ], "lang": { "en-US": { "role": { "documentation": "Information by component of equity.", "label": "Equity Components [Axis]", "terseLabel": "Equity Components [Axis]" } } }, "localname": "StatementEquityComponentsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccumulatedOtherComprehensiveIncomeDetails", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "us-gaap_StatementLineItems": { "auth_ref": [], "lang": { "en-US": { "role": { "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.", "label": "Statement [Line Items]", "terseLabel": "Statement" } } }, "localname": "StatementLineItems", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "us-gaap_StatementOfCashFlowsAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Cash Flows [Abstract]" } } }, "localname": "StatementOfCashFlowsAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfFinancialPositionAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Financial Position [Abstract]" } } }, "localname": "StatementOfFinancialPositionAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Comprehensive Income [Abstract]" } } }, "localname": "StatementOfIncomeAndComprehensiveIncomeAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementOfStockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Statement of Stockholders' Equity [Abstract]" } } }, "localname": "StatementOfStockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "xbrltype": "stringItemType" }, "us-gaap_StatementScenarioAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by scenario to be reported. Scenarios distinguish among different kinds of business reporting facts, as for example actual versus budgeted figures.", "label": "Scenario [Axis]", "terseLabel": "Scenario" } } }, "localname": "StatementScenarioAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" ], "xbrltype": "stringItemType" }, "us-gaap_StatementTable": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Schedule reflecting a Statement of Income, Statement of Cash Flows, Statement of Financial Position, Statement of Shareholders' Equity and Other Comprehensive Income, or other statement as needed.", "label": "Statement [Table]", "terseLabel": "Statement" } } }, "localname": "StatementTable", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "stringItemType" }, "us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised": { "auth_ref": [ "r13", "r14", "r165", "r170", "r205" ], "lang": { "en-US": { "role": { "documentation": "Number of share options (or share units) exercised during the current period.", "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period", "terseLabel": "Share-based awards (in shares)" } } }, "localname": "StockIssuedDuringPeriodSharesStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised": { "auth_ref": [ "r31", "r165", "r170" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Value of stock issued as a result of the exercise of stock options.", "label": "Stock Issued During Period, Value, Stock Options Exercised", "terseLabel": "Share-based awards" } } }, "localname": "StockIssuedDuringPeriodValueStockOptionsExercised", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquity": { "auth_ref": [ "r14", "r18", "r19", "r126" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 2.0, "parentTag": "us-gaap_LiabilitiesAndStockholdersEquity", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.", "label": "Stockholders' Equity Attributable to Parent", "periodEndLabel": "Ending Balance", "periodStartLabel": "Beginning Balance", "totalLabel": "Total shareholders' equity" } } }, "localname": "StockholdersEquity", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets", "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StockholdersEquityAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Stockholders' Equity Attributable to Parent [Abstract]", "terseLabel": "Shareholders' Equity" } } }, "localname": "StockholdersEquityAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "stringItemType" }, "us-gaap_StockholdersEquityOther": { "auth_ref": [], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "This element represents movements included in the statement of changes in stockholders' equity which are not separately disclosed or provided for elsewhere in the taxonomy.", "label": "Stockholders' Equity, Other", "negatedTerseLabel": "Other" } } }, "localname": "StockholdersEquityOther", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_StructuredFinanceMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "This category includes information about generally complex financial arrangement used to help transfer risk, also referred to as structured debt.", "label": "Structured Finance [Member]", "terseLabel": "Structured settlements" } } }, "localname": "StructuredFinanceMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueOfLifePolicyLoansDeferredAnnuitiesAndStructuredSettlementsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_StructuredSettlementAnnuityMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Contract providing periodic payments to a policyholder as agreed in settlement of a lawsuit.", "label": "Structured Settlement Annuity [Member]", "terseLabel": "Structured Settlement Annuity" } } }, "localname": "StructuredSettlementAnnuityMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsAdditionalInformationDetail", "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_SubsegmentsAxis": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Information by business subsegments.", "label": "Subsegments [Axis]", "terseLabel": "Subsegments [Axis]" } } }, "localname": "SubsegmentsAxis", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "stringItemType" }, "us-gaap_SubsegmentsDomain": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Divisions of a component of an entity that engage in business activities from which they may earn revenue and incur expenses, including transactions with other components of the same entity.", "label": "Subsegments [Domain]", "terseLabel": "Subsegments [Domain]" } } }, "localname": "SubsegmentsDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/SegmentInformationDetail" ], "xbrltype": "domainItemType" }, "us-gaap_SupplementalCashFlowInformationAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Supplemental Cash Flow Information [Abstract]", "terseLabel": "Supplemental Disclosures of Cash Flow Information:" } } }, "localname": "SupplementalCashFlowInformationAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "stringItemType" }, "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense": { "auth_ref": [ "r355" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": 1.0, "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs.", "label": "Current Year Claims and Claims Adjustment Expense", "terseLabel": "Current accident year" } } }, "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense": { "auth_ref": [ "r355" ], "calculation": { "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail": { "order": 2.0, "parentTag": "us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1", "weight": 1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs.", "label": "Prior Year Claims and Claims Adjustment Expense", "terseLabel": "Prior accident years" } } }, "localname": "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesAdditionalInformationDetail", "http://www.cinfin.com/role/PropertyCasualtyLossAndLossExpensesConsolidatedPropertyCasualtyLossAndLossExpenseReservesDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain": { "auth_ref": [ "r270" ], "lang": { "en-US": { "role": { "documentation": "Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms.", "label": "Financial Instruments [Domain]", "terseLabel": "Financial Instruments [Domain]" } } }, "localname": "TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockMember": { "auth_ref": [ "r30", "r171" ], "lang": { "en-US": { "role": { "documentation": "Shares of an entity that have been repurchased by the entity. This stock has no voting rights and receives no dividends. Note that treasury stock may be recorded at its total cost or separately as par (or stated) value and additional paid in capital. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer.", "label": "Treasury Stock [Member]", "terseLabel": "Treasury Stock" } } }, "localname": "TreasuryStockMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "domainItemType" }, "us-gaap_TreasuryStockShares": { "auth_ref": [ "r30", "r171" ], "lang": { "en-US": { "role": { "documentation": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.", "label": "Treasury Stock, Shares", "terseLabel": "Treasury stock, shares" } } }, "localname": "TreasuryStockShares", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheetsParenthetical" ], "xbrltype": "sharesItemType" }, "us-gaap_TreasuryStockSharesAcquired": { "auth_ref": [ "r14", "r165", "r170" ], "lang": { "en-US": { "role": { "documentation": "Number of shares that have been repurchased during the period and are being held in treasury.", "label": "Treasury Stock, Shares, Acquired", "negatedTerseLabel": "Shares acquired - share repurchase authorization (in shares)" } } }, "localname": "TreasuryStockSharesAcquired", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "sharesItemType" }, "us-gaap_TreasuryStockValue": { "auth_ref": [ "r30", "r171", "r172" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 5.0, "parentTag": "us-gaap_StockholdersEquity", "weight": -1.0 } }, "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.", "label": "Treasury Stock, Value", "negatedLabel": "Treasury stock at cost (2019\u201435.0 million shares and 2018\u201435.5 million shares)" } } }, "localname": "TreasuryStockValue", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_TreasuryStockValueAcquiredCostMethod": { "auth_ref": [ "r165", "r170", "r171" ], "crdr": "debit", "lang": { "en-US": { "role": { "documentation": "Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.", "label": "Treasury Stock, Value, Acquired, Cost Method", "negatedLabel": "Shares acquired - share repurchase authorization" } } }, "localname": "TreasuryStockValueAcquiredCostMethod", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfShareholdersEquity" ], "xbrltype": "monetaryItemType" }, "us-gaap_TypeOfAdoptionMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Adoption and early adoption of sources of change to generally accepted accounting principles (GAAP) in the United States. The FASB released the FASB Accounting Standards Codification as the authoritative source of literature effective for interim and annual periods ending after September 15, 2009. As part of the Codification process, the FASB issues Accounting Standards Updates to amend the Codification but otherwise the Accounting Standards Updates are not authoritative in their own right. All previous accounting standards (such as FASB Statements of Financial Accounting Standards, FASB Interpretations, FASB Staff Positions, Emerging Issues Task Force Consensuses, other pronouncements of the FASB or other designated bodies, or other forms of GAAP are considered accounting pronouncements) were superseded upon the adoption of the Codification. For an interim period, references to the superseded standards are included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.", "label": "Type of Adoption [Domain]", "terseLabel": "Type of Adoption" } } }, "localname": "TypeOfAdoptionMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/AccountingPoliciesDetails" ], "xbrltype": "domainItemType" }, "us-gaap_USGovernmentAgenciesDebtSecuritiesMember": { "auth_ref": [ "r179", "r280" ], "lang": { "en-US": { "role": { "documentation": "Debentures, notes, and other debt securities issued by US government agencies, for example, but not limited to, Government National Mortgage Association (GNMA or Ginnie Mae). Excludes US treasury securities and debt issued by government-sponsored Enterprises (GSEs), for example, but is not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB).", "label": "US Government Agencies Debt Securities [Member]", "terseLabel": "United States government" } } }, "localname": "USGovernmentAgenciesDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember": { "auth_ref": [ "r179", "r280" ], "lang": { "en-US": { "role": { "documentation": "Debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae).", "label": "US Government-sponsored Enterprises Debt Securities [Member]", "terseLabel": "Government-sponsored enterprises" } } }, "localname": "USGovernmentSponsoredEnterprisesDebtSecuritiesMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_USStatesAndPoliticalSubdivisionsMember": { "auth_ref": [ "r179" ], "lang": { "en-US": { "role": { "documentation": "Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments.", "label": "US States and Political Subdivisions Debt Securities [Member]", "terseLabel": "States, municipalities and political subdivisions", "verboseLabel": "States, Municipalities And Political Subdivisions Fixed Maturities" } } }, "localname": "USStatesAndPoliticalSubdivisionsMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/FairValueMeasurementsChangeInLevel3AssetsDetail", "http://www.cinfin.com/role/FairValueMeasurementsFairValueHierarchyForAssetsMeasuredAtFairValueOnRecurringBasisDetail", "http://www.cinfin.com/role/InvestmentsAnalysisOfCostOrAmortizedCostGrossUnrealizedGainsAndLossesAndFairValueForInvestmentsDetail", "http://www.cinfin.com/role/InvestmentsFairValuesAndUnrealizedLossesByInvestmentCategoryAndByDurationOfSecuritiesContinuousUnrealizedLossPositionDetail" ], "xbrltype": "domainItemType" }, "us-gaap_UnearnedPremiums": { "auth_ref": [ "r311" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets": { "order": 3.0, "parentTag": "us-gaap_Liabilities", "weight": 1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Carrying amount of premiums written on insurance contracts that have not been earned as of the balance sheet date.", "label": "Unearned Premiums", "terseLabel": "Unearned premiums" } } }, "localname": "UnearnedPremiums", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedBalanceSheets" ], "xbrltype": "monetaryItemType" }, "us-gaap_UniversalLifeMember": { "auth_ref": [], "lang": { "en-US": { "role": { "documentation": "Life insurance contract under which premiums are generally flexible, the level of death benefits may be adjusted, and mortality expense, and other charges may vary.", "label": "Universal Life [Member]", "terseLabel": "Universal life" } } }, "localname": "UniversalLifeMember", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/ReservesInAdditionToAccountBalanceBasedOnExpectedNoLapseGuaranteeBenefitsAndExpectedPolicyAssessmentsDetail" ], "xbrltype": "domainItemType" }, "us-gaap_UnrealizedGainLossOnInvestments": { "auth_ref": [ "r79" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.", "label": "Unrealized Gain (Loss) on Investments", "terseLabel": "Unrealized Gain (Loss) on Investments" } } }, "localname": "UnrealizedGainLossOnInvestments", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/InvestmentsRealizedInvestmentGainsAndLossesAndChangeInUnrealizedInvestmentGainsAndLossesAndOtherItemsDetail" ], "xbrltype": "monetaryItemType" }, "us-gaap_UnrecognizedTaxBenefits": { "auth_ref": [ "r210", "r215" ], "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "Amount of unrecognized tax benefits.", "label": "Unrecognized Tax Benefits", "terseLabel": "Unrecognized Tax Benefits" } } }, "localname": "UnrecognizedTaxBenefits", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/IncomeTaxesNarrativeDetails" ], "xbrltype": "monetaryItemType" }, "us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding": { "auth_ref": [ "r101", "r106" ], "lang": { "en-US": { "role": { "documentation": "The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.", "label": "Weighted Average Number of Shares Outstanding, Diluted", "terseLabel": "Diluted weighted-average shares" } } }, "localname": "WeightedAverageNumberOfDilutedSharesOutstanding", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract": { "auth_ref": [], "lang": { "en-US": { "role": { "label": "Weighted Average Number of Shares Outstanding, Diluted [Abstract]", "terseLabel": "Denominator:" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingAbstract", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "stringItemType" }, "us-gaap_WeightedAverageNumberOfSharesOutstandingBasic": { "auth_ref": [ "r100", "r106" ], "lang": { "en-US": { "role": { "documentation": "Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.", "label": "Weighted Average Number of Shares Outstanding, Basic", "terseLabel": "Basic weighted-average common shares outstanding (in shares)" } } }, "localname": "WeightedAverageNumberOfSharesOutstandingBasic", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/NetIncomePerCommonShareCalculationsForBasicAndDilutedEarningsPerShareDetail" ], "xbrltype": "sharesItemType" }, "us-gaap_WithdrawalFromContractHoldersFunds": { "auth_ref": [ "r72" ], "calculation": { "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows": { "order": 5.0, "parentTag": "us-gaap_NetCashProvidedByUsedInFinancingActivities", "weight": -1.0 } }, "crdr": "credit", "lang": { "en-US": { "role": { "documentation": "The cash outflow for a segregated fund account during the period.", "label": "Withdrawal from Contract Holders Funds", "negatedLabel": "Contract holders' funds withdrawn" } } }, "localname": "WithdrawalFromContractHoldersFunds", "nsuri": "http://fasb.org/us-gaap/2018-01-31", "presentation": [ "http://www.cinfin.com/role/CondensedConsolidatedStatementsOfCashFlows" ], "xbrltype": "monetaryItemType" } }, "unitCount": 8 } }, "std_ref": { "r0": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "205", "URI": "http://asc.fasb.org/extlink&oid=109222650&loc=d3e1361-107760" }, "r1": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765" }, "r10": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(a))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r100": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1448-109256" }, "r101": { "Name": "Accounting Standards Codification", "Paragraph": "16", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1505-109256" }, "r102": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1252-109256" }, "r103": { "Name": "Accounting Standards Codification", "Paragraph": "28A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1500-109256" }, "r104": { "Name": "Accounting Standards Codification", "Paragraph": "60B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=SL5780133-109256" }, "r105": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109260490&loc=d3e1337-109256" }, "r106": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r107": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r108": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257" }, "r109": { "Name": "Accounting Standards Codification", "Paragraph": "52", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "260", "URI": "http://asc.fasb.org/extlink&oid=109256448&loc=d3e4984-109258" }, "r11": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(26)(b))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r110": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "260", "URI": "http://asc.fasb.org/topic&trid=2144383" }, "r111": { "Name": "Accounting Standards Codification", "Paragraph": "21", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599" }, "r112": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r113": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r114": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r115": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r116": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r117": { "Name": "Accounting Standards Codification", "Paragraph": "22", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599" }, "r118": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599" }, "r119": { "Name": "Accounting Standards Codification", "Paragraph": "30", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599" }, "r12": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(27))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r120": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r121": { "Name": "Accounting Standards Codification", "Paragraph": "32", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599" }, "r122": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e8475-108599" }, "r123": { "Name": "Accounting Standards Codification", "Paragraph": "40", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "280", "URI": "http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599" }, "r124": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "280", "URI": "http://asc.fasb.org/topic&trid=2134510" }, "r125": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522" }, "r126": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 4.E)", "Topic": "310", "URI": "http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707" }, "r127": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "10", "Topic": "310", "URI": "http://asc.fasb.org/subtopic&trid=2196772" }, "r128": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562" }, "r129": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=109979856&loc=d3e26853-111562" }, "r13": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(28))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r130": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27405-111563" }, "r131": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r132": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(aa)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r133": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r134": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r135": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563" }, "r136": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563" }, "r137": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563" }, "r138": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563" }, "r139": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563" }, "r14": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(29))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r140": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563" }, "r141": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563" }, "r142": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563" }, "r143": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27340-111563" }, "r144": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)-(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563" }, "r145": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "320", "URI": "http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563" }, "r146": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "320", "URI": "http://asc.fasb.org/topic&trid=2196928" }, "r147": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266" }, "r148": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975" }, "r149": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267" }, "r15": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r150": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r151": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(3)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r152": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275" }, "r153": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r154": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)(1)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r155": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(d)", "Topic": "350", "URI": "http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275" }, "r156": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r157": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229" }, "r158": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "360", "URI": "http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230" }, "r159": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869" }, "r16": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r160": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 5.P.4(d))", "Topic": "420", "URI": "http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747" }, "r161": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "440", "URI": "http://asc.fasb.org/topic&trid=2144648" }, "r162": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "450", "URI": "http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349" }, "r163": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "450", "URI": "http://asc.fasb.org/topic&trid=2127136" }, "r164": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(b)(3)", "Topic": "470", "URI": "http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870" }, "r165": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644" }, "r166": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644" }, "r167": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644" }, "r168": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644" }, "r169": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644" }, "r17": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30)(a)(3))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r170": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.3-04)", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770" }, "r171": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655" }, "r172": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "505", "URI": "http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656" }, "r173": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045" }, "r174": { "Name": "Accounting Standards Codification", "Paragraph": "91", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "606", "URI": "http://asc.fasb.org/extlink&oid=108792157&loc=SL49130690-203046-203046" }, "r175": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r176": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "15", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "712", "URI": "http://asc.fasb.org/extlink&oid=6410066&loc=d3e79218-111664" }, "r177": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r178": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r179": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(ii)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r18": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(30))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r180": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(d)(iv)(01)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r181": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r182": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r183": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r184": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r185": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(h)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r186": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(i)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r187": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(j)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r188": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920" }, "r189": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2410-114920" }, "r19": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(31))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r190": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920" }, "r191": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2439-114920" }, "r192": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r193": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(1)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r194": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(2)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r195": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r196": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(4)", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920" }, "r197": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921" }, "r198": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "70", "Topic": "715", "URI": "http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942" }, "r199": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "715", "URI": "http://asc.fasb.org/topic&trid=2235017" }, "r2": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(12))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r20": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(32))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r200": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "35", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=79507207&loc=d3e4534-113899" }, "r201": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901" }, "r202": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901" }, "r203": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901" }, "r204": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a),(g)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901" }, "r205": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)(iv)(2)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901" }, "r206": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901" }, "r207": { "Name": "Accounting Standards Codification", "Paragraph": "2A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901" }, "r208": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109196918&loc=d3e11149-113907" }, "r209": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "718", "URI": "http://asc.fasb.org/extlink&oid=109196918&loc=d3e11178-113907" }, "r21": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.1)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r210": { "Name": "Accounting Standards Codification", "Paragraph": "10B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=SL37586934-109318" }, "r211": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84176650&loc=d3e31917-109318" }, "r212": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319" }, "r213": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319" }, "r214": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319" }, "r215": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r216": { "Name": "Accounting Standards Codification", "Paragraph": "15A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319" }, "r217": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32840-109319" }, "r218": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319" }, "r219": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319" }, "r22": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.12)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r220": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r221": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319" }, "r222": { "Name": "Accounting Standards Codification", "Paragraph": "217", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238393&loc=d3e36027-109320" }, "r223": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB TOPIC 6.I)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817" }, "r224": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SAB Topic 6.I.7)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817" }, "r225": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e39076-109324" }, "r226": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "740", "URI": "http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324" }, "r227": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "740", "URI": "http://asc.fasb.org/topic&trid=2144680" }, "r228": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463" }, "r229": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463" }, "r23": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.14)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r230": { "Name": "Accounting Standards Codification", "Paragraph": "37", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=108330185&loc=d3e2207-128464" }, "r231": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(c)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472" }, "r232": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472" }, "r233": { "Name": "Accounting Standards Codification", "Paragraph": "38", "Publisher": "FASB", "Section": "55", "SubTopic": "20", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=77890550&loc=d3e5504-128473" }, "r234": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(b)(1)", "Topic": "805", "URI": "http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479" }, "r235": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "805", "URI": "http://asc.fasb.org/topic&trid=2303972" }, "r236": { "Name": "Accounting Standards Codification", "Paragraph": "19", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683" }, "r237": { "Name": "Accounting Standards Codification", "Paragraph": "20", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=108774443&loc=SL4569643-111683" }, "r238": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r239": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c),(3)", "Topic": "810", "URI": "http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684" }, "r24": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19,20,22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r240": { "Name": "Accounting Standards Codification", "Paragraph": "4A", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959" }, "r241": { "Name": "Accounting Standards Codification", "Paragraph": "4B", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959" }, "r242": { "Name": "Accounting Standards Codification", "Paragraph": "4C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959" }, "r243": { "Name": "Accounting Standards Codification", "Paragraph": "4D", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "815", "URI": "http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959" }, "r244": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258" }, "r245": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r246": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r247": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(bb)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r248": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r249": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r25": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.19-26)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r250": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(1a)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r251": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(2)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r252": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Subparagraph": "(c)(3)", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258" }, "r253": { "Name": "Accounting Standards Codification", "Paragraph": "2C", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=SL7498348-110258" }, "r254": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "820", "URI": "http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258" }, "r255": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "820", "URI": "http://asc.fasb.org/topic&trid=2155941" }, "r256": { "Name": "Accounting Standards Codification", "Paragraph": "10", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "825", "URI": "http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611" }, "r257": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "825", "URI": "http://asc.fasb.org/topic&trid=2134543" }, "r258": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391" }, "r259": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399" }, "r26": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(1))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r260": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399" }, "r261": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399" }, "r262": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "835", "URI": "http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400" }, "r263": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(a)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r264": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(b)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977" }, "r265": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(a)(3)", "Topic": "842", "URI": "http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980" }, "r266": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r267": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(1)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r268": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(2)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r269": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Subparagraph": "(bb)(3)", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=109247956&loc=d3e107207-111719" }, "r27": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22(a)(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r270": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "50", "Topic": "860", "URI": "http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746" }, "r271": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "340", "Topic": "928", "URI": "http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004" }, "r272": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "940", "URI": "http://asc.fasb.org/subtopic&trid=2176304" }, "r273": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "820", "Topic": "940", "URI": "http://asc.fasb.org/extlink&oid=35710923&loc=d3e45360-110995" }, "r274": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(10))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r275": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r276": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(13))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r277": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(15)(2))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r278": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(16))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r279": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r28": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.22)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r280": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6)(a)(1))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r281": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03(6))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r282": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.15)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r283": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.17)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r284": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.9-03.7)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878" }, "r285": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(11))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r286": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(13)(c))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r287": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(22))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r288": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04(23))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r289": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.13(c),(d))", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r29": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.25)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r290": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.9-04.9)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260" }, "r291": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803" }, "r292": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(a)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r293": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(b)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r294": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(c)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r295": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Subparagraph": "(d)", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r296": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803" }, "r297": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "942", "URI": "http://asc.fasb.org/subtopic&trid=2209399" }, "r298": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "470", "Topic": "942", "URI": "http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823" }, "r299": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "20", "Subparagraph": "(d)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6480726&loc=d3e6691-158385" }, "r3": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(13))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r30": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29,30)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r300": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6811-158387" }, "r301": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "20", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99397103&loc=d3e6824-158387" }, "r302": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(13)(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r303": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(13))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r304": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(15)(b)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r305": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r306": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1)(b))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r307": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(1)(e))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r308": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(10))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r309": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(11))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r31": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02.29-31)", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r310": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(12))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r311": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(13)(a)(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r312": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(16))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r313": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r314": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(23)(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r315": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(25))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r316": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(4))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r317": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(7))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r318": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03(a)(8))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r319": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),19)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r32": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r320": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),5)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r321": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.(a),6)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r322": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.1(f,g))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r323": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.1(h))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r324": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "210", "Subparagraph": "(SX 210.7-03.13(a)(1))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910" }, "r325": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(1))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r326": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(18))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r327": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(19))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r328": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(2))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r329": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04(7)(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r33": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(f)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r330": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04.2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r331": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04.3(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r332": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04.4)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r333": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04.5)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r334": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "220", "Subparagraph": "(SX 210.7-04.5,6,7)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263" }, "r335": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-17(Column B))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r336": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-17(Column C))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r337": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-17(Column D))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r338": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-17(Column E))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r339": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-17)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r34": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(h)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r340": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e574992-122915" }, "r341": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-18(Column A)(a))", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915" }, "r342": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "235", "Subparagraph": "(SX 210.12-18)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915" }, "r343": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "30", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6481648&loc=d3e11198-158413" }, "r344": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415" }, "r345": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Subparagraph": "(c)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415" }, "r346": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "30", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415" }, "r347": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "55", "SubTopic": "30", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=68057816&loc=d3e11446-158418" }, "r348": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "30", "Topic": "944", "URI": "http://asc.fasb.org/subtopic&trid=4737841" }, "r349": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99404803&loc=d3e21409-158489" }, "r35": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r350": { "Name": "Accounting Standards Codification", "Paragraph": "6", "Publisher": "FASB", "Section": "45", "SubTopic": "310", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99404803&loc=d3e21412-158489" }, "r351": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "25", "SubTopic": "340", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6485982&loc=d3e22818-158507" }, "r352": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "25", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=28366191&loc=d3e13145-158430" }, "r353": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14754-158437" }, "r354": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437" }, "r355": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437" }, "r356": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(c)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437" }, "r357": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Subparagraph": "(cc)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437" }, "r358": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437" }, "r359": { "Name": "Accounting Standards Codification", "Paragraph": "4H", "Publisher": "FASB", "Section": "50", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99384497&loc=SL65671331-158438" }, "r36": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i),(j),(k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r360": { "Name": "Accounting Standards Codification", "Paragraph": "9C", "Publisher": "FASB", "Section": "55", "SubTopic": "40", "Subparagraph": "(a)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99385871&loc=SL65671395-207642" }, "r361": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "40", "Topic": "944", "URI": "http://asc.fasb.org/subtopic&trid=2560295" }, "r362": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "605", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=84167274&loc=d3e27175-158546" }, "r363": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(a)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r364": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(b)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r365": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(b)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r366": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(b)(3)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r367": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(c)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r368": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(c)(2)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r369": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "605", "Subparagraph": "(c)(3)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547" }, "r37": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(i-k)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r370": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "45", "SubTopic": "80", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6484091&loc=d3e19268-158472" }, "r371": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(b)(1)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473" }, "r372": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "80", "Subparagraph": "(e)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473" }, "r373": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "25", "SubTopic": "825", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6487514&loc=d3e32427-158581" }, "r374": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "45", "SubTopic": "825", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=6487548&loc=d3e32546-158582" }, "r375": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "50", "SubTopic": "825", "Subparagraph": "(b)", "Topic": "944", "URI": "http://asc.fasb.org/extlink&oid=99380617&loc=SL75241803-196195" }, "r376": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "944", "URI": "http://asc.fasb.org/topic&trid=2303980" }, "r377": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12(2)(i))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r378": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12.2(ii))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010" }, "r379": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(1)(a))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r38": { "Name": "Accounting Standards Codification", "Paragraph": "10A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580" }, "r380": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(1)(b))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r381": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C(2))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r382": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-12C.1(b),2)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r383": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12C(2))-", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010" }, "r384": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-13(1))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611282-123010" }, "r385": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15(Column A))", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r386": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "S99", "SubTopic": "320", "Subparagraph": "(SX 210.12-15)", "Topic": "946", "URI": "http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010" }, "r387": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "SubTopic": "320", "Topic": "946", "URI": "http://asc.fasb.org/subtopic&trid=2324412" }, "r388": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b" }, "r389": { "Name": "Exchange Act", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "d1-1" }, "r39": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580" }, "r390": { "Name": "Form 10-Q", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-13" }, "r391": { "Name": "Forms 10-K, 10-Q, 20-F", "Number": "240", "Publisher": "SEC", "Section": "13", "Subsection": "a-1-" }, "r392": { "Name": "Regulation 12B", "Number": "240", "Publisher": "SEC", "Section": "12", "Subsection": "b-2" }, "r393": { "Name": "Regulation S-T", "Number": "232", "Publisher": "SEC", "Section": "405" }, "r4": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(14))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r40": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580" }, "r41": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580" }, "r42": { "Name": "Accounting Standards Codification", "Paragraph": "14A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580" }, "r43": { "Name": "Accounting Standards Codification", "Paragraph": "17B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL34724394-108580" }, "r44": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" }, "r45": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" }, "r46": { "Name": "Accounting Standards Codification", "Paragraph": "1A", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669619-108580" }, "r47": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580" }, "r48": { "Name": "Accounting Standards Codification", "Paragraph": "1B", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=SL7669625-108580" }, "r49": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=114867106&loc=d3e557-108580" }, "r5": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(17))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r50": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "55", "SubTopic": "10", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=109228884&loc=d3e1436-108581" }, "r51": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(210.5-03(11))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r52": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(20))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r53": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03(21))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r54": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.1)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r55": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.3)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r56": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r57": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(b))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r58": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.7(c),9(a))", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r59": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-03.9)", "Topic": "220", "URI": "http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227" }, "r6": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(19))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r60": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "220", "URI": "http://asc.fasb.org/topic&trid=2134417" }, "r61": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3151-108585" }, "r62": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r63": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r64": { "Name": "Accounting Standards Codification", "Paragraph": "12", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585" }, "r65": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r66": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r67": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(c)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r68": { "Name": "Accounting Standards Codification", "Paragraph": "13", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585" }, "r69": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585" }, "r7": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(2))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r70": { "Name": "Accounting Standards Codification", "Paragraph": "14", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585" }, "r71": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585" }, "r72": { "Name": "Accounting Standards Codification", "Paragraph": "15", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585" }, "r73": { "Name": "Accounting Standards Codification", "Paragraph": "17", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(d)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585" }, "r74": { "Name": "Accounting Standards Codification", "Paragraph": "24", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585" }, "r75": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(e)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585" }, "r76": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(g)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585" }, "r77": { "Name": "Accounting Standards Codification", "Paragraph": "25", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585" }, "r78": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(a)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r79": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Subparagraph": "(b)", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r8": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(20))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r80": { "Name": "Accounting Standards Codification", "Paragraph": "28", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585" }, "r81": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "45", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585" }, "r82": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586" }, "r83": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586" }, "r84": { "Name": "Accounting Standards Codification", "Paragraph": "4", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586" }, "r85": { "Name": "Accounting Standards Codification", "Paragraph": "5", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "230", "URI": "http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586" }, "r86": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r87": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08(h))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r88": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(e),(f))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r89": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(1)(i))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r9": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.5-02(22))", "Topic": "210", "URI": "http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682" }, "r90": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.4-08.(h)(2))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690" }, "r91": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "S99", "SubTopic": "10", "Subparagraph": "(SX 210.12-04(a))", "Topic": "235", "URI": "http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690" }, "r92": { "Name": "Accounting Standards Codification", "Publisher": "FASB", "Topic": "235", "URI": "http://asc.fasb.org/topic&trid=2122369" }, "r93": { "Name": "Accounting Standards Codification", "Paragraph": "1", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794" }, "r94": { "Name": "Accounting Standards Codification", "Paragraph": "11", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794" }, "r95": { "Name": "Accounting Standards Codification", "Paragraph": "2", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22580-107794" }, "r96": { "Name": "Accounting Standards Codification", "Paragraph": "3", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794" }, "r97": { "Name": "Accounting Standards Codification", "Paragraph": "7", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794" }, "r98": { "Name": "Accounting Standards Codification", "Paragraph": "8", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794" }, "r99": { "Name": "Accounting Standards Codification", "Paragraph": "9", "Publisher": "FASB", "Section": "50", "SubTopic": "10", "Topic": "250", "URI": "http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794" } }, "version": "2.1" }