{ "version": "2.2", "instance": { "filing9932.htm": { "nsprefix": "fmr", "nsuri": "http://www.fidelity.com/20251030", "dts": { "inline": { "local": [ "filing9932.htm" ] }, "schema": { "local": [ "fmr-20251030.xsd" ], "remote": [ "http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd", "http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd", "http://www.xbrl.org/2003/xl-2003-12-31.xsd", "http://www.xbrl.org/2003/xlink-2003-12-31.xsd", "http://www.xbrl.org/2005/xbrldt-2005.xsd", "http://www.xbrl.org/2006/ref-2006-02-27.xsd", "http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd", "http://www.xbrl.org/lrr/arcrole/deprecated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd", "http://www.xbrl.org/lrr/role/reference-2009-12-16.xsd", "https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd", "https://www.xbrl.org/dtr/type/2020-01-21/types.xsd", "https://www.xbrl.org/dtr/type/2022-03-31/types.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-roles-2024.xsd", "https://xbrl.fasb.org/srt/2024/elts/srt-types-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd", "https://xbrl.fasb.org/us-gaap/2024/elts/us-types-2024.xsd", "https://xbrl.sec.gov/country/2024/country-2024.xsd", "https://xbrl.sec.gov/country/2024/country-2024_def.xsd", "https://xbrl.sec.gov/dei/2024/dei-2024.xsd", "https://xbrl.sec.gov/oef/2024q3/oef-2024q3.xsd", "https://xbrl.sec.gov/oef/2024q3/oef-2024q3_cal.xsd", "https://xbrl.sec.gov/oef/2024q3/oef-2024q3_lab.xsd", "https://xbrl.sec.gov/oef/2024q3/oef-sr-2024q3.xsd", "https://xbrl.sec.gov/stpr/2024/stpr-2024.xsd" ] } }, "keyStandard": 44, "keyCustom": 0, "axisStandard": 7, "axisCustom": 0, "memberStandard": 16, "memberCustom": 595, "hidden": { "total": 5, "http://xbrl.sec.gov/dei/2024": 5 }, "contextCount": 1383, "entityCount": 1, "segmentCount": 611, "elementCount": 743, "unitCount": 3, "baseTaxonomies": { "http://xbrl.sec.gov/oef/2024q3": 1849, "http://xbrl.sec.gov/dei/2024": 49, "http://fasb.org/us-gaap/2024": 44 }, "report": { "R1": { "role": "http://xbrl.sec.gov/oef/role/NcsrCover", "longName": "030000 - Disclosure - Form N-CSR Cover", "shortName": "Form N-CSR Cover", "isDefault": "true", "groupType": "disclosure", "subGroupType": "", "menuCat": "Cover", "order": "1", "firstAnchor": { "contextRef": "Trust", "name": "dei:DocumentPeriodEndDate", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true }, "uniqueAnchor": null }, "R2": { "role": "http://xbrl.sec.gov/oef/role/ShareholderReport", "longName": "030001 - Disclosure - Shareholder Report", "shortName": "Shareholder Report", "isDefault": "false", "groupType": "disclosure", "subGroupType": "", "menuCat": "Notes", "order": "2", "firstAnchor": { "contextRef": "Trust", "name": "dei:DocumentPeriodEndDate", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true }, "uniqueAnchor": { "contextRef": "C000235234_ClassMember", "name": "oef:FundName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "unique": true } }, "R3": { "role": "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails", "longName": "040010 - Disclosure - Shareholder Report, Line Graph (Details)", "shortName": "Shareholder Report, Line Graph (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "3", "firstAnchor": { "contextRef": "C000235234_LG_ClassMember_4YR", "name": "oef:LineGraphAndTableMeasureName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "div", "oef:LineGraphTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "C000235234_LG_ClassMember_4YR", "name": "oef:LineGraphAndTableMeasureName", "unitRef": null, "xsiNil": "false", "lang": "en-US", "decimals": null, "ancestors": [ "div", "td", "tr", "table", "div", "div", "oef:LineGraphTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true } }, "R4": { "role": "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "longName": "040015 - Disclosure - Shareholder Report, Average Annual Return (Details)", "shortName": "Shareholder Report, Average Annual Return (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "4", "firstAnchor": { "contextRef": "C000235234_1_BBIndexMember_1YR", "name": "oef:AvgAnnlRtrPct", "unitRef": "pure", "xsiNil": "false", "lang": null, "decimals": "INF", "ancestors": [ "div", "td", "tr", "table", "div", "oef:AvgAnnlRtrTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "C000235234_1_BBIndexMember_1YR", "name": "oef:AvgAnnlRtrPct", "unitRef": "pure", "xsiNil": "false", "lang": null, "decimals": "INF", "ancestors": [ "div", "td", "tr", "table", "div", "oef:AvgAnnlRtrTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true } }, "R5": { "role": "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "longName": "040020 - Disclosure - Shareholder Report, Holdings (Details)", "shortName": "Shareholder Report, Holdings (Details)", "isDefault": "false", "groupType": "disclosure", "subGroupType": "details", "menuCat": "Details", "order": "5", "firstAnchor": { "contextRef": "C000235234_TH_0_Member", "name": "oef:PctOfNav", "unitRef": "pure", "xsiNil": "false", "lang": null, "decimals": "INF", "ancestors": [ "div", "td", "tr", "table", "oef:LargestHoldingsTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true }, "uniqueAnchor": { "contextRef": "C000235234_TH_0_Member", "name": "oef:PctOfNav", "unitRef": "pure", "xsiNil": "false", "lang": null, "decimals": "INF", "ancestors": [ "div", "td", "tr", "table", "oef:LargestHoldingsTableTextBlock", "div", "body", "html" ], "reportCount": 1, "baseRef": "filing9932.htm", "first": true, "unique": true } } }, "tag": { "fmr_AAAssetBackedSecuritiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAAssetBackedSecuritiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAAssetBackedSecuritiesMember [Member]", "verboseLabel": "AAAssetBackedSecuritiesMember", "terseLabel": "AAAssetBackedSecuritiesMember" } } }, "auth_ref": [] }, "fmr_AABankLoanObligationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AABankLoanObligationsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AABankLoanObligationsMember [Member]", "verboseLabel": "AABankLoanObligationsMember", "terseLabel": "AABankLoanObligationsMember" } } }, "auth_ref": [] }, "fmr_AACMOsandOtherMortgageRelatedSecuritiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AACMOsandOtherMortgageRelatedSecuritiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AACMOsandOtherMortgageRelatedSecuritiesMember [Member]", "verboseLabel": "AACMOsandOtherMortgageRelatedSecuritiesMember", "terseLabel": "AACMOsandOtherMortgageRelatedSecuritiesMember" } } }, "auth_ref": [] }, "fmr_AACommonStocksMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AACommonStocksMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AACommonStocksMember [Member]", "verboseLabel": "AACommonStocksMember", "terseLabel": "AACommonStocksMember" } } }, "auth_ref": [] }, "fmr_AACorporateBondsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AACorporateBondsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AACorporateBondsMember [Member]", "verboseLabel": "AACorporateBondsMember", "terseLabel": "AACorporateBondsMember" } } }, "auth_ref": [] }, "fmr_AAForeignGovernmentandGovernmentAgencyObligationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAForeignGovernmentandGovernmentAgencyObligationsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAForeignGovernmentandGovernmentAgencyObligationsMember [Member]", "verboseLabel": "AAForeignGovernmentandGovernmentAgencyObligationsMember", "terseLabel": "AAForeignGovernmentandGovernmentAgencyObligationsMember" } } }, "auth_ref": [] }, "fmr_AAOptionsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAOptionsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAOptionsMember [Member]", "verboseLabel": "AAOptionsMember", "terseLabel": "AAOptionsMember" } } }, "auth_ref": [] }, "fmr_AAOtherInvestmentsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAOtherInvestmentsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAOtherInvestmentsMember [Member]", "verboseLabel": "AAOtherInvestmentsMember", "terseLabel": "AAOtherInvestmentsMember" } } }, "auth_ref": [] }, "fmr_AAPreferredSecuritiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAPreferredSecuritiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAPreferredSecuritiesMember [Member]", "verboseLabel": "AAPreferredSecuritiesMember", "terseLabel": "AAPreferredSecuritiesMember" } } }, "auth_ref": [] }, "fmr_AAPreferredStocksMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAPreferredStocksMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAPreferredStocksMember [Member]", "verboseLabel": "AAPreferredStocksMember", "terseLabel": "AAPreferredStocksMember" } } }, "auth_ref": [] }, "fmr_AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember [Member]", "verboseLabel": "AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember", "terseLabel": "AAShortTermInvestmentsandNetOtherAssetsLiabilitiesMember" } } }, "auth_ref": [] }, "fmr_AAUSGovernmentAgencyMortgageSecuritiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAUSGovernmentAgencyMortgageSecuritiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAUSGovernmentAgencyMortgageSecuritiesMember [Member]", "verboseLabel": "AAUSGovernmentAgencyMortgageSecuritiesMember", "terseLabel": "AAUSGovernmentAgencyMortgageSecuritiesMember" } } }, "auth_ref": [] }, "fmr_AAUSGovernmentAgencyObligationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAUSGovernmentAgencyObligationsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAUSGovernmentAgencyObligationsMember [Member]", "verboseLabel": "AAUSGovernmentAgencyObligationsMember", "terseLabel": "AAUSGovernmentAgencyObligationsMember" } } }, "auth_ref": [] }, "fmr_AAUSTreasuryObligationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "AAUSTreasuryObligationsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "AAUSTreasuryObligationsMember [Member]", "verboseLabel": "AAUSTreasuryObligationsMember", "terseLabel": "AAUSTreasuryObligationsMember" } } }, "auth_ref": [] }, "country_AU": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "AU", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Australia", "terseLabel": "Australia" } } }, "auth_ref": [] }, "oef_AccmVal": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccmVal", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Accumulated Value" } } }, "auth_ref": [ "r34" ] }, "oef_AccountValueLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountValueLineItems", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Account Value [Line Items]" } } }, "auth_ref": [ "r33" ] }, "oef_AccountValueTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountValueTable", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Account Value [Table]" } } }, "auth_ref": [ "r33" ] }, "oef_AccountValueTableAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountValueTableAbstract", "lang": { "en-us": { "role": { "label": "Account Value Table [Abstract]" } } }, "auth_ref": [ "r33" ] }, "oef_AccountantChngDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountantChngDate", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Accountant Change Date" } } }, "auth_ref": [ "r57" ] }, "oef_AccountantChngDisagreementsTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountantChngDisagreementsTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Accountant Change Disagreements [Text Block]" } } }, "auth_ref": [ "r58" ] }, "oef_AccountantChngStatementTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AccountantChngStatementTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Accountant Change Statement [Text Block]" } } }, "auth_ref": [ "r57" ] }, "oef_AcctVal": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AcctVal", "presentation": [ "http://xbrl.sec.gov/oef/role/Deprecated" ], "lang": { "en-us": { "role": { "label": "Account Value (Deprecated 2024-07-31)" } } }, "auth_ref": [ "r34" ] }, "oef_AcquiredFundFeesAndExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AcquiredFundFeesAndExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 5.0 } }, "lang": { "en-us": { "role": { "label": "Acquired Fund Fees and Expenses" } } }, "auth_ref": [ "r67" ] }, "oef_AdditionalIndexAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AdditionalIndexAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Additional Index [Axis]" } } }, "auth_ref": [ "r33" ] }, "oef_AdditionalIndexDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AdditionalIndexDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Additional Index [Domain]" } } }, "auth_ref": [ "r33" ] }, "oef_AddlFundStatisticsSignificanceOrLimitsTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlFundStatisticsSignificanceOrLimitsTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Fund Statistics Significance or Limits [Text Block]" } } }, "auth_ref": [ "r47" ] }, "oef_AddlFundStatisticsTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlFundStatisticsTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Fund Statistics [Text Block]" } } }, "auth_ref": [ "r46" ] }, "oef_AddlInfoEmail": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlInfoEmail", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Information Email" } } }, "auth_ref": [ "r25" ] }, "oef_AddlInfoPhoneNumber": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlInfoPhoneNumber", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Information Phone Number" } } }, "auth_ref": [ "r25" ] }, "oef_AddlInfoTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlInfoTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Information [Text Block]" } } }, "auth_ref": [ "r23" ] }, "oef_AddlInfoWebsite": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AddlInfoWebsite", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Additional Information Website" } } }, "auth_ref": [ "r25" ] }, "oef_AdvisoryFeesPaidAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AdvisoryFeesPaidAmt", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Advisory Fees Paid, Amount" } } }, "auth_ref": [ "r46" ] }, "dei_AmendmentDescription": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AmendmentDescription", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Amendment Description", "documentation": "Description of changes contained within amended document." } } }, "auth_ref": [] }, "dei_AmendmentFlag": { "xbrltype": "booleanItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "AmendmentFlag", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Amendment Flag", "documentation": "Boolean flag that is true when the XBRL content amends previously-filed or accepted submission." } } }, "auth_ref": [] }, "oef_AnnlOrSemiAnnlStatementTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AnnlOrSemiAnnlStatementTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Annual or Semi-Annual Statement [Text Block]" } } }, "auth_ref": [ "r22" ] }, "us-gaap_AssetsNet": { "xbrltype": "monetaryItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "AssetsNet", "crdr": "debit", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "documentation": "Amount of net assets (liabilities).", "label": "Net Assets" } } }, "auth_ref": [ "r0" ] }, "oef_AverageAnnualReturnAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AverageAnnualReturnAbstract", "lang": { "en-us": { "role": { "label": "Average Annual Return:" } } }, "auth_ref": [ "r69" ] }, "oef_AverageAnnualReturnLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AverageAnnualReturnLineItems", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Average Annual Return [Line Items]" } } }, "auth_ref": [ "r69" ] }, "oef_AverageAnnualReturnTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AverageAnnualReturnTable", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Average Annual Return [Table]" } } }, "auth_ref": [ "r69" ] }, "oef_AvgAnnlRtrPct": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AvgAnnlRtrPct", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Average Annual Return, Percent" } } }, "auth_ref": [ "r40" ] }, "oef_AvgAnnlRtrTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "AvgAnnlRtrTableTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Average Annual Return [Table Text Block]" } } }, "auth_ref": [ "r40" ] }, "country_BE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "BE", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Belgium", "terseLabel": "Belgium" } } }, "auth_ref": [] }, "fmr_BailiwickOfJerseyMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "BailiwickOfJerseyMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "BailiwickOfJerseyMember" } } }, "auth_ref": [] }, "oef_BroadBasedIndexAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "BroadBasedIndexAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Broad Based Index [Axis]" } } }, "auth_ref": [ "r33" ] }, "oef_BroadBasedIndexDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "BroadBasedIndexDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Broad Based Index [Domain]" } } }, "auth_ref": [ "r33" ] }, "fmr_C000098000Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000 [Member]", "verboseLabel": "Fidelity Conservative Income Bond Fund", "terseLabel": "Fidelity Conservative Income Bond Fund" } } }, "auth_ref": [] }, "fmr_C000098000_0_AdditionalIndexMember_10YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_0_AdditionalIndexMember_10YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_0_AdditionalIndexMember_10YRMember [Member]", "verboseLabel": "C000098000_0_AdditionalIndexMember_10YRMember", "terseLabel": "C000098000_0_AdditionalIndexMember_10YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000098000_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000098000_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_0_AdditionalIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_0_AdditionalIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_0_AdditionalIndexMember_5YRMember [Member]", "verboseLabel": "C000098000_0_AdditionalIndexMember_5YRMember", "terseLabel": "C000098000_0_AdditionalIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2015Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2015Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2015Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2015Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2015Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2016Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2016Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2016Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2016Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2016Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2017Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2017Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000098000_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000098000_1_BBIndexMember_10YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_BBIndexMember_10YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_BBIndexMember_10YRMember [Member]", "verboseLabel": "C000098000_1_BBIndexMember_10YRMember", "terseLabel": "C000098000_1_BBIndexMember_10YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000098000_1_BBIndexMember_1YRMember", "terseLabel": "C000098000_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_1_BBIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_1_BBIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_1_BBIndexMember_5YRMember [Member]", "verboseLabel": "C000098000_1_BBIndexMember_5YRMember", "terseLabel": "C000098000_1_BBIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2015Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2015Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2015Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2015Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2015Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2016Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2016Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2016Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2016Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2016Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2017Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2017Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000098000_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000098000_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2015Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2015Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2015Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2015Member", "terseLabel": "C000098000_ClassMember_AsOf_2015Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2016Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2016Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2016Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2016Member", "terseLabel": "C000098000_ClassMember_AsOf_2016Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2017Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2017Member", "terseLabel": "C000098000_ClassMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2018Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2018Member", "terseLabel": "C000098000_ClassMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2019Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2019Member", "terseLabel": "C000098000_ClassMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2020Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2020Member", "terseLabel": "C000098000_ClassMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2021Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2021Member", "terseLabel": "C000098000_ClassMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2022Member", "terseLabel": "C000098000_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2023Member", "terseLabel": "C000098000_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2024Member", "terseLabel": "C000098000_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000098000_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000098000_ClassMember_AsOf_2025Member", "terseLabel": "C000098000_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000098000_LG_1_AdditionalIndexMember_11YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_LG_1_AdditionalIndexMember_11YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_LG_1_AdditionalIndexMember_11YRMember [Member]", "verboseLabel": "C000098000_LG_1_AdditionalIndexMember_11YRMember", "terseLabel": "C000098000_LG_1_AdditionalIndexMember_11YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_LG_2_AdditionalIndexMember_11YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_LG_2_AdditionalIndexMember_11YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_LG_2_AdditionalIndexMember_11YRMember [Member]", "verboseLabel": "C000098000_LG_2_AdditionalIndexMember_11YRMember", "terseLabel": "C000098000_LG_2_AdditionalIndexMember_11YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_LG_ClassMember_11YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_LG_ClassMember_11YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_LG_ClassMember_11YRMember [Member]", "verboseLabel": "C000098000_LG_ClassMember_11YRMember", "terseLabel": "C000098000_LG_ClassMember_11YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_NoLoadClassMember_10YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_NoLoadClassMember_10YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_NoLoadClassMember_10YRMember [Member]", "verboseLabel": "C000098000_NoLoadClassMember_10YRMember", "terseLabel": "C000098000_NoLoadClassMember_10YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000098000_NoLoadClassMember_1YRMember", "terseLabel": "C000098000_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000098000_NoLoadClassMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000098000_NoLoadClassMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000098000_NoLoadClassMember_5YRMember [Member]", "verboseLabel": "C000098000_NoLoadClassMember_5YRMember", "terseLabel": "C000098000_NoLoadClassMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000194645Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645 [Member]", "verboseLabel": "Fidelity Short-Term Bond Index Fund", "terseLabel": "Fidelity Short-Term Bond Index Fund" } } }, "auth_ref": [] }, "fmr_C000194645_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000194645_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000194645_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_0_AdditionalIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_0_AdditionalIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_0_AdditionalIndexMember_5YRMember [Member]", "verboseLabel": "C000194645_0_AdditionalIndexMember_5YRMember", "terseLabel": "C000194645_0_AdditionalIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000194645_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000194645_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2017Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2017Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000194645_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000194645_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000194645_1_BBIndexMember_1YRMember", "terseLabel": "C000194645_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_1_BBIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_BBIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_BBIndexMember_5YRMember [Member]", "verboseLabel": "C000194645_1_BBIndexMember_5YRMember", "terseLabel": "C000194645_1_BBIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000194645_1_BBIndexMember_LOCMember", "terseLabel": "C000194645_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2017Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2017Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000194645_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000194645_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2017Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2017Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2017Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2017Member", "terseLabel": "C000194645_ClassMember_AsOf_2017Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2018Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2018Member", "terseLabel": "C000194645_ClassMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2019Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2019Member", "terseLabel": "C000194645_ClassMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2020Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2020Member", "terseLabel": "C000194645_ClassMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2021Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2021Member", "terseLabel": "C000194645_ClassMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2022Member", "terseLabel": "C000194645_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2023Member", "terseLabel": "C000194645_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2024Member", "terseLabel": "C000194645_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000194645_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000194645_ClassMember_AsOf_2025Member", "terseLabel": "C000194645_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000194645_LG_1_AdditionalIndexMember_9YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_LG_1_AdditionalIndexMember_9YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_LG_1_AdditionalIndexMember_9YRMember [Member]", "verboseLabel": "C000194645_LG_1_AdditionalIndexMember_9YRMember", "terseLabel": "C000194645_LG_1_AdditionalIndexMember_9YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_LG_2_AdditionalIndexMember_9YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_LG_2_AdditionalIndexMember_9YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_LG_2_AdditionalIndexMember_9YRMember [Member]", "verboseLabel": "C000194645_LG_2_AdditionalIndexMember_9YRMember", "terseLabel": "C000194645_LG_2_AdditionalIndexMember_9YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_LG_ClassMember_9YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_LG_ClassMember_9YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_LG_ClassMember_9YRMember [Member]", "verboseLabel": "C000194645_LG_ClassMember_9YRMember", "terseLabel": "C000194645_LG_ClassMember_9YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000194645_NoLoadClassMember_1YRMember", "terseLabel": "C000194645_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000194645_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000194645_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000194645_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000194645_NoLoadClassMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000194645_NoLoadClassMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000194645_NoLoadClassMember_5YRMember [Member]", "verboseLabel": "C000194645_NoLoadClassMember_5YRMember", "terseLabel": "C000194645_NoLoadClassMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000199795Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795 [Member]", "verboseLabel": "Fidelity Sustainability Bond Index Fund", "terseLabel": "Fidelity Sustainability Bond Index Fund" } } }, "auth_ref": [] }, "fmr_C000199795_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000199795_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000199795_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_0_AdditionalIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_0_AdditionalIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_0_AdditionalIndexMember_5YRMember [Member]", "verboseLabel": "C000199795_0_AdditionalIndexMember_5YRMember", "terseLabel": "C000199795_0_AdditionalIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000199795_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000199795_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000199795_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000199795_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000199795_1_BBIndexMember_1YRMember", "terseLabel": "C000199795_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_1_BBIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_BBIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_BBIndexMember_5YRMember [Member]", "verboseLabel": "C000199795_1_BBIndexMember_5YRMember", "terseLabel": "C000199795_1_BBIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000199795_1_BBIndexMember_LOCMember", "terseLabel": "C000199795_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000199795_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000199795_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2018Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2018Member", "terseLabel": "C000199795_ClassMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2019Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2019Member", "terseLabel": "C000199795_ClassMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2020Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2020Member", "terseLabel": "C000199795_ClassMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2021Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2021Member", "terseLabel": "C000199795_ClassMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2022Member", "terseLabel": "C000199795_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2023Member", "terseLabel": "C000199795_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2024Member", "terseLabel": "C000199795_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000199795_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000199795_ClassMember_AsOf_2025Member", "terseLabel": "C000199795_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000199795_LG_1_AdditionalIndexMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_LG_1_AdditionalIndexMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_LG_1_AdditionalIndexMember_8YRMember [Member]", "verboseLabel": "C000199795_LG_1_AdditionalIndexMember_8YRMember", "terseLabel": "C000199795_LG_1_AdditionalIndexMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_LG_2_AdditionalIndexMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_LG_2_AdditionalIndexMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_LG_2_AdditionalIndexMember_8YRMember [Member]", "verboseLabel": "C000199795_LG_2_AdditionalIndexMember_8YRMember", "terseLabel": "C000199795_LG_2_AdditionalIndexMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_LG_ClassMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_LG_ClassMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_LG_ClassMember_8YRMember [Member]", "verboseLabel": "C000199795_LG_ClassMember_8YRMember", "terseLabel": "C000199795_LG_ClassMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000199795_NoLoadClassMember_1YRMember", "terseLabel": "C000199795_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000199795_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000199795_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000199795_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000199795_NoLoadClassMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000199795_NoLoadClassMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000199795_NoLoadClassMember_5YRMember [Member]", "verboseLabel": "C000199795_NoLoadClassMember_5YRMember", "terseLabel": "C000199795_NoLoadClassMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000203456Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456 [Member]", "verboseLabel": "Fidelity Series Corporate Bond Fund", "terseLabel": "Fidelity Series Corporate Bond Fund" } } }, "auth_ref": [] }, "fmr_C000203456_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000203456_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000203456_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_0_AdditionalIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_0_AdditionalIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_0_AdditionalIndexMember_5YRMember [Member]", "verboseLabel": "C000203456_0_AdditionalIndexMember_5YRMember", "terseLabel": "C000203456_0_AdditionalIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000203456_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000203456_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000203456_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000203456_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000203456_1_BBIndexMember_1YRMember", "terseLabel": "C000203456_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_1_BBIndexMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_BBIndexMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_BBIndexMember_5YRMember [Member]", "verboseLabel": "C000203456_1_BBIndexMember_5YRMember", "terseLabel": "C000203456_1_BBIndexMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000203456_1_BBIndexMember_LOCMember", "terseLabel": "C000203456_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2018Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2018Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2019Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2019Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2020Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2020Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2021Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2021Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000203456_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000203456_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2018Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2018Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2018Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2018Member", "terseLabel": "C000203456_ClassMember_AsOf_2018Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2019Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2019Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2019Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2019Member", "terseLabel": "C000203456_ClassMember_AsOf_2019Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2020Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2020Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2020Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2020Member", "terseLabel": "C000203456_ClassMember_AsOf_2020Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2021Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2021Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2021Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2021Member", "terseLabel": "C000203456_ClassMember_AsOf_2021Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2022Member", "terseLabel": "C000203456_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2023Member", "terseLabel": "C000203456_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2024Member", "terseLabel": "C000203456_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000203456_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000203456_ClassMember_AsOf_2025Member", "terseLabel": "C000203456_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000203456_LG_1_AdditionalIndexMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_LG_1_AdditionalIndexMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_LG_1_AdditionalIndexMember_8YRMember [Member]", "verboseLabel": "C000203456_LG_1_AdditionalIndexMember_8YRMember", "terseLabel": "C000203456_LG_1_AdditionalIndexMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_LG_2_AdditionalIndexMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_LG_2_AdditionalIndexMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_LG_2_AdditionalIndexMember_8YRMember [Member]", "verboseLabel": "C000203456_LG_2_AdditionalIndexMember_8YRMember", "terseLabel": "C000203456_LG_2_AdditionalIndexMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_LG_ClassMember_8YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_LG_ClassMember_8YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_LG_ClassMember_8YRMember [Member]", "verboseLabel": "C000203456_LG_ClassMember_8YRMember", "terseLabel": "C000203456_LG_ClassMember_8YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000203456_NoLoadClassMember_1YRMember", "terseLabel": "C000203456_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000203456_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000203456_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000203456_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000203456_NoLoadClassMember_5YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000203456_NoLoadClassMember_5YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000203456_NoLoadClassMember_5YRMember [Member]", "verboseLabel": "C000203456_NoLoadClassMember_5YRMember", "terseLabel": "C000203456_NoLoadClassMember_5YRMember" } } }, "auth_ref": [] }, "fmr_C000235215Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215 [Member]", "verboseLabel": "Fidelity SAI Sustainable Low Duration Bond Fund", "terseLabel": "Fidelity SAI Sustainable Low Duration Bond Fund" } } }, "auth_ref": [] }, "fmr_C000235215_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235215_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235215_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235215_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235215_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235215_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235215_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235215_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235215_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235215_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235215_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235215_1_BBIndexMember_1YRMember", "terseLabel": "C000235215_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235215_1_BBIndexMember_LOCMember", "terseLabel": "C000235215_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235215_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235215_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235215_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235215_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235215_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235215_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235215_ClassMember_AsOf_2022Member", "terseLabel": "C000235215_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235215_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235215_ClassMember_AsOf_2023Member", "terseLabel": "C000235215_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235215_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235215_ClassMember_AsOf_2024Member", "terseLabel": "C000235215_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235215_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235215_ClassMember_AsOf_2025Member", "terseLabel": "C000235215_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235215_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235215_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235215_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235215_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235215_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235215_LG_ClassMember_4YRMember", "terseLabel": "C000235215_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235215_NoLoadClassMember_1YRMember", "terseLabel": "C000235215_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235215_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235215_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235215_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235215_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235215_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235217Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217 [Member]", "verboseLabel": "Fidelity Sustainable Core Plus Bond Fund", "terseLabel": "Fidelity Sustainable Core Plus Bond Fund" } } }, "auth_ref": [] }, "fmr_C000235217_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235217_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235217_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235217_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235217_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235217_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235217_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235217_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235217_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235217_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235217_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235217_1_BBIndexMember_1YRMember", "terseLabel": "C000235217_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235217_1_BBIndexMember_LOCMember", "terseLabel": "C000235217_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235217_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235217_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235217_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235217_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235217_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235217_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235217_ClassMember_AsOf_2022Member", "terseLabel": "C000235217_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235217_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235217_ClassMember_AsOf_2023Member", "terseLabel": "C000235217_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235217_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235217_ClassMember_AsOf_2024Member", "terseLabel": "C000235217_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235217_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235217_ClassMember_AsOf_2025Member", "terseLabel": "C000235217_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235217_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235217_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235217_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235217_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235217_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235217_LG_ClassMember_4YRMember", "terseLabel": "C000235217_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235217_NoLoadClassMember_1YRMember", "terseLabel": "C000235217_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235217_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235217_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235217_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235217_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235217_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235218Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class C", "terseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class C" } } }, "auth_ref": [] }, "fmr_C000235218_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235218_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235218_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235218_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235218_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235218_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235218_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235218_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235218_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235218_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235218_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235218_1_BBIndexMember_1YRMember", "terseLabel": "C000235218_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235218_1_BBIndexMember_LOCMember", "terseLabel": "C000235218_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235218_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235218_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235218_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235218_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235218_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_1YRMember [Member]", "verboseLabel": "C000235218_ClassMember_1YRMember", "terseLabel": "C000235218_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235218_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235218_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235218_ClassMember_AsOf_2022Member", "terseLabel": "C000235218_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235218_ClassMember_AsOf_2023Member", "terseLabel": "C000235218_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235218_ClassMember_AsOf_2024Member", "terseLabel": "C000235218_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235218_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235218_ClassMember_AsOf_2025Member", "terseLabel": "C000235218_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235218_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235218_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235218_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235218_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235218_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235218_LG_ClassMember_4YRMember", "terseLabel": "C000235218_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235218_NoLoadClassMember_1YRMember", "terseLabel": "C000235218_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235218_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235218_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235218_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235218_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235218_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235219Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class A", "terseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class A" } } }, "auth_ref": [] }, "fmr_C000235219_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235219_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235219_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235219_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235219_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235219_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235219_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235219_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235219_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235219_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235219_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235219_1_BBIndexMember_1YRMember", "terseLabel": "C000235219_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235219_1_BBIndexMember_LOCMember", "terseLabel": "C000235219_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235219_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235219_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235219_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235219_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235219_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_1YRMember [Member]", "verboseLabel": "C000235219_ClassMember_1YRMember", "terseLabel": "C000235219_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235219_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235219_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235219_ClassMember_AsOf_2022Member", "terseLabel": "C000235219_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235219_ClassMember_AsOf_2023Member", "terseLabel": "C000235219_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235219_ClassMember_AsOf_2024Member", "terseLabel": "C000235219_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235219_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235219_ClassMember_AsOf_2025Member", "terseLabel": "C000235219_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235219_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235219_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235219_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235219_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235219_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235219_LG_ClassMember_4YRMember", "terseLabel": "C000235219_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235219_NoLoadClassMember_1YRMember", "terseLabel": "C000235219_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235219_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235219_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235219_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235219_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235219_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235220Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class Z", "terseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class Z" } } }, "auth_ref": [] }, "fmr_C000235220_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235220_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235220_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235220_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235220_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235220_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235220_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235220_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235220_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235220_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235220_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235220_1_BBIndexMember_1YRMember", "terseLabel": "C000235220_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235220_1_BBIndexMember_LOCMember", "terseLabel": "C000235220_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235220_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235220_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235220_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235220_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235220_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235220_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235220_ClassMember_AsOf_2022Member", "terseLabel": "C000235220_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235220_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235220_ClassMember_AsOf_2023Member", "terseLabel": "C000235220_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235220_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235220_ClassMember_AsOf_2024Member", "terseLabel": "C000235220_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235220_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235220_ClassMember_AsOf_2025Member", "terseLabel": "C000235220_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235220_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235220_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235220_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235220_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235220_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235220_LG_ClassMember_4YRMember", "terseLabel": "C000235220_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235220_NoLoadClassMember_1YRMember", "terseLabel": "C000235220_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235220_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235220_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235220_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235220_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235220_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235221Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class I", "terseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class I" } } }, "auth_ref": [] }, "fmr_C000235221_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235221_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235221_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235221_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235221_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235221_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235221_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235221_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235221_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235221_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235221_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235221_1_BBIndexMember_1YRMember", "terseLabel": "C000235221_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235221_1_BBIndexMember_LOCMember", "terseLabel": "C000235221_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235221_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235221_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235221_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235221_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235221_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235221_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235221_ClassMember_AsOf_2022Member", "terseLabel": "C000235221_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235221_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235221_ClassMember_AsOf_2023Member", "terseLabel": "C000235221_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235221_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235221_ClassMember_AsOf_2024Member", "terseLabel": "C000235221_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235221_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235221_ClassMember_AsOf_2025Member", "terseLabel": "C000235221_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235221_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235221_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235221_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235221_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235221_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235221_LG_ClassMember_4YRMember", "terseLabel": "C000235221_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235221_NoLoadClassMember_1YRMember", "terseLabel": "C000235221_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235221_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235221_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235221_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235221_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235221_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235222Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class M", "terseLabel": "Fidelity Advisor Sustainable Core Plus Bond Fund - Class M" } } }, "auth_ref": [] }, "fmr_C000235222_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235222_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235222_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235222_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235222_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235222_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235222_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235222_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235222_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235222_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235222_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235222_1_BBIndexMember_1YRMember", "terseLabel": "C000235222_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235222_1_BBIndexMember_LOCMember", "terseLabel": "C000235222_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235222_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235222_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235222_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235222_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235222_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_1YRMember [Member]", "verboseLabel": "C000235222_ClassMember_1YRMember", "terseLabel": "C000235222_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235222_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235222_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235222_ClassMember_AsOf_2022Member", "terseLabel": "C000235222_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235222_ClassMember_AsOf_2023Member", "terseLabel": "C000235222_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235222_ClassMember_AsOf_2024Member", "terseLabel": "C000235222_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235222_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235222_ClassMember_AsOf_2025Member", "terseLabel": "C000235222_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235222_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235222_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235222_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235222_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235222_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235222_LG_ClassMember_4YRMember", "terseLabel": "C000235222_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235222_NoLoadClassMember_1YRMember", "terseLabel": "C000235222_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235222_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235222_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235222_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235222_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235222_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235229Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class A", "terseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class A" } } }, "auth_ref": [] }, "fmr_C000235229_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235229_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235229_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235229_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235229_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235229_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235229_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235229_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235229_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235229_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235229_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235229_1_BBIndexMember_1YRMember", "terseLabel": "C000235229_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235229_1_BBIndexMember_LOCMember", "terseLabel": "C000235229_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235229_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235229_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235229_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235229_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235229_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_1YRMember [Member]", "verboseLabel": "C000235229_ClassMember_1YRMember", "terseLabel": "C000235229_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235229_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235229_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235229_ClassMember_AsOf_2022Member", "terseLabel": "C000235229_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235229_ClassMember_AsOf_2023Member", "terseLabel": "C000235229_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235229_ClassMember_AsOf_2024Member", "terseLabel": "C000235229_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235229_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235229_ClassMember_AsOf_2025Member", "terseLabel": "C000235229_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235229_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235229_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235229_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235229_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235229_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235229_LG_ClassMember_4YRMember", "terseLabel": "C000235229_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235229_NoLoadClassMember_1YRMember", "terseLabel": "C000235229_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235229_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235229_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235229_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235229_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235229_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235230Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class M", "terseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class M" } } }, "auth_ref": [] }, "fmr_C000235230_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235230_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235230_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235230_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235230_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235230_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235230_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235230_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235230_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235230_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235230_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235230_1_BBIndexMember_1YRMember", "terseLabel": "C000235230_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235230_1_BBIndexMember_LOCMember", "terseLabel": "C000235230_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235230_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235230_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235230_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235230_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235230_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_1YRMember [Member]", "verboseLabel": "C000235230_ClassMember_1YRMember", "terseLabel": "C000235230_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235230_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235230_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235230_ClassMember_AsOf_2022Member", "terseLabel": "C000235230_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235230_ClassMember_AsOf_2023Member", "terseLabel": "C000235230_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235230_ClassMember_AsOf_2024Member", "terseLabel": "C000235230_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235230_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235230_ClassMember_AsOf_2025Member", "terseLabel": "C000235230_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235230_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235230_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235230_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235230_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235230_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235230_LG_ClassMember_4YRMember", "terseLabel": "C000235230_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235230_NoLoadClassMember_1YRMember", "terseLabel": "C000235230_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235230_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235230_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235230_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235230_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235230_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235231Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class C", "terseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class C" } } }, "auth_ref": [] }, "fmr_C000235231_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235231_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235231_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235231_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235231_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235231_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235231_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235231_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235231_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235231_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235231_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235231_1_BBIndexMember_1YRMember", "terseLabel": "C000235231_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235231_1_BBIndexMember_LOCMember", "terseLabel": "C000235231_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235231_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235231_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235231_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235231_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235231_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_1YRMember [Member]", "verboseLabel": "C000235231_ClassMember_1YRMember", "terseLabel": "C000235231_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235231_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235231_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235231_ClassMember_AsOf_2022Member", "terseLabel": "C000235231_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235231_ClassMember_AsOf_2023Member", "terseLabel": "C000235231_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235231_ClassMember_AsOf_2024Member", "terseLabel": "C000235231_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235231_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235231_ClassMember_AsOf_2025Member", "terseLabel": "C000235231_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235231_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235231_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235231_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235231_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235231_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235231_LG_ClassMember_4YRMember", "terseLabel": "C000235231_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235231_NoLoadClassMember_1YRMember", "terseLabel": "C000235231_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235231_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235231_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235231_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235231_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235231_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235232Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class I", "terseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class I" } } }, "auth_ref": [] }, "fmr_C000235232_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235232_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235232_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235232_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235232_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235232_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235232_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235232_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235232_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235232_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235232_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235232_1_BBIndexMember_1YRMember", "terseLabel": "C000235232_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235232_1_BBIndexMember_LOCMember", "terseLabel": "C000235232_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235232_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235232_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235232_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235232_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235232_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235232_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235232_ClassMember_AsOf_2022Member", "terseLabel": "C000235232_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235232_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235232_ClassMember_AsOf_2023Member", "terseLabel": "C000235232_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235232_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235232_ClassMember_AsOf_2024Member", "terseLabel": "C000235232_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235232_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235232_ClassMember_AsOf_2025Member", "terseLabel": "C000235232_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235232_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235232_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235232_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235232_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235232_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235232_LG_ClassMember_4YRMember", "terseLabel": "C000235232_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235232_NoLoadClassMember_1YRMember", "terseLabel": "C000235232_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235232_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235232_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235232_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235232_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235232_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235233Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233 [Member]", "verboseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class Z", "terseLabel": "Fidelity Advisor Sustainable Low Duration Bond Fund - Class Z" } } }, "auth_ref": [] }, "fmr_C000235233_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235233_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235233_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235233_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235233_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235233_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235233_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235233_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235233_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235233_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235233_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235233_1_BBIndexMember_1YRMember", "terseLabel": "C000235233_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235233_1_BBIndexMember_LOCMember", "terseLabel": "C000235233_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235233_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235233_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235233_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235233_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235233_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235233_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235233_ClassMember_AsOf_2022Member", "terseLabel": "C000235233_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235233_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235233_ClassMember_AsOf_2023Member", "terseLabel": "C000235233_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235233_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235233_ClassMember_AsOf_2024Member", "terseLabel": "C000235233_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235233_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235233_ClassMember_AsOf_2025Member", "terseLabel": "C000235233_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235233_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235233_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235233_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235233_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235233_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235233_LG_ClassMember_4YRMember", "terseLabel": "C000235233_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235233_NoLoadClassMember_1YRMember", "terseLabel": "C000235233_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235233_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235233_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235233_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235233_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235233_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000235234Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234 [Member]", "verboseLabel": "Fidelity Sustainable Low Duration Bond Fund", "terseLabel": "Fidelity Sustainable Low Duration Bond Fund" } } }, "auth_ref": [] }, "fmr_C000235234_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000235234_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000235234_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000235234_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000235234_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235234_1_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235234_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235234_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235234_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235234_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235234_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000235234_1_BBIndexMember_1YRMember", "terseLabel": "C000235234_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000235234_1_BBIndexMember_LOCMember", "terseLabel": "C000235234_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000235234_2_AdditionalIndexMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_2_AdditionalIndexMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_2_AdditionalIndexMember_AsOf_2022Member [Member]", "verboseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2022Member", "terseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235234_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235234_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235234_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000235234_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235234_ClassMember_AsOf_2022Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_ClassMember_AsOf_2022Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_ClassMember_AsOf_2022Member [Member]", "verboseLabel": "C000235234_ClassMember_AsOf_2022Member", "terseLabel": "C000235234_ClassMember_AsOf_2022Member" } } }, "auth_ref": [] }, "fmr_C000235234_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000235234_ClassMember_AsOf_2023Member", "terseLabel": "C000235234_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000235234_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000235234_ClassMember_AsOf_2024Member", "terseLabel": "C000235234_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000235234_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000235234_ClassMember_AsOf_2025Member", "terseLabel": "C000235234_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000235234_LG_1_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_LG_1_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_LG_1_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235234_LG_1_AdditionalIndexMember_4YRMember", "terseLabel": "C000235234_LG_1_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_LG_2_AdditionalIndexMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_LG_2_AdditionalIndexMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_LG_2_AdditionalIndexMember_4YRMember [Member]", "verboseLabel": "C000235234_LG_2_AdditionalIndexMember_4YRMember", "terseLabel": "C000235234_LG_2_AdditionalIndexMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_LG_ClassMember_4YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_LG_ClassMember_4YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_LG_ClassMember_4YRMember [Member]", "verboseLabel": "C000235234_LG_ClassMember_4YRMember", "terseLabel": "C000235234_LG_ClassMember_4YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000235234_NoLoadClassMember_1YRMember", "terseLabel": "C000235234_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000235234_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000235234_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000235234_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000235234_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000235234_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000242612Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612 [Member]", "verboseLabel": "Fidelity Series Sustainable Investment Grade Bond Fund", "terseLabel": "Fidelity Series Sustainable Investment Grade Bond Fund" } } }, "auth_ref": [] }, "fmr_C000242612_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000242612_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000242612_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000242612_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000242612_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000242612_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242612_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242612_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000242612_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242612_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000242612_1_BBIndexMember_1YRMember", "terseLabel": "C000242612_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000242612_1_BBIndexMember_LOCMember", "terseLabel": "C000242612_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000242612_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242612_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242612_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000242612_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242612_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000242612_ClassMember_AsOf_2023Member", "terseLabel": "C000242612_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242612_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000242612_ClassMember_AsOf_2024Member", "terseLabel": "C000242612_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242612_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000242612_ClassMember_AsOf_2025Member", "terseLabel": "C000242612_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242612_LG_1_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_LG_1_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_LG_1_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000242612_LG_1_AdditionalIndexMember_3YRMember", "terseLabel": "C000242612_LG_1_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_LG_2_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_LG_2_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_LG_2_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000242612_LG_2_AdditionalIndexMember_3YRMember", "terseLabel": "C000242612_LG_2_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_LG_ClassMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_LG_ClassMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_LG_ClassMember_3YRMember [Member]", "verboseLabel": "C000242612_LG_ClassMember_3YRMember", "terseLabel": "C000242612_LG_ClassMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000242612_NoLoadClassMember_1YRMember", "terseLabel": "C000242612_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242612_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242612_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242612_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000242612_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000242612_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000242809Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809 [Member]", "verboseLabel": "Fidelity SAI Investment Grade Securitized Fund", "terseLabel": "Fidelity SAI Investment Grade Securitized Fund" } } }, "auth_ref": [] }, "fmr_C000242809_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000242809_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000242809_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000242809_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000242809_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000242809_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242809_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242809_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000242809_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242809_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000242809_1_BBIndexMember_1YRMember", "terseLabel": "C000242809_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000242809_1_BBIndexMember_LOCMember", "terseLabel": "C000242809_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000242809_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242809_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242809_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000242809_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242809_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000242809_ClassMember_AsOf_2023Member", "terseLabel": "C000242809_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000242809_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000242809_ClassMember_AsOf_2024Member", "terseLabel": "C000242809_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000242809_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000242809_ClassMember_AsOf_2025Member", "terseLabel": "C000242809_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000242809_LG_1_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_LG_1_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_LG_1_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000242809_LG_1_AdditionalIndexMember_3YRMember", "terseLabel": "C000242809_LG_1_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_LG_2_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_LG_2_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_LG_2_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000242809_LG_2_AdditionalIndexMember_3YRMember", "terseLabel": "C000242809_LG_2_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_LG_ClassMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_LG_ClassMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_LG_ClassMember_3YRMember [Member]", "verboseLabel": "C000242809_LG_ClassMember_3YRMember", "terseLabel": "C000242809_LG_ClassMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000242809_NoLoadClassMember_1YRMember", "terseLabel": "C000242809_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000242809_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000242809_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000242809_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000242809_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000242809_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000243069Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069 [Member]", "verboseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class Z", "terseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class Z" } } }, "auth_ref": [] }, "fmr_C000243069_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000243069_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000243069_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000243069_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000243069_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243069_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243069_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243069_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243069_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243069_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000243069_1_BBIndexMember_1YRMember", "terseLabel": "C000243069_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000243069_1_BBIndexMember_LOCMember", "terseLabel": "C000243069_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243069_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243069_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243069_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243069_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243069_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000243069_ClassMember_AsOf_2023Member", "terseLabel": "C000243069_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243069_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000243069_ClassMember_AsOf_2024Member", "terseLabel": "C000243069_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243069_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000243069_ClassMember_AsOf_2025Member", "terseLabel": "C000243069_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243069_LG_1_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_LG_1_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_LG_1_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243069_LG_1_AdditionalIndexMember_3YRMember", "terseLabel": "C000243069_LG_1_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_LG_2_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_LG_2_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_LG_2_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243069_LG_2_AdditionalIndexMember_3YRMember", "terseLabel": "C000243069_LG_2_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_LG_ClassMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_LG_ClassMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_LG_ClassMember_3YRMember [Member]", "verboseLabel": "C000243069_LG_ClassMember_3YRMember", "terseLabel": "C000243069_LG_ClassMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000243069_NoLoadClassMember_1YRMember", "terseLabel": "C000243069_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243069_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243069_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243069_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000243069_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000243069_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000243070Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070 [Member]", "verboseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class A", "terseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class A" } } }, "auth_ref": [] }, "fmr_C000243070_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000243070_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000243070_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000243070_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000243070_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243070_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243070_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243070_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243070_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243070_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000243070_1_BBIndexMember_1YRMember", "terseLabel": "C000243070_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000243070_1_BBIndexMember_LOCMember", "terseLabel": "C000243070_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243070_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243070_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243070_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243070_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243070_ClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_ClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_ClassMember_1YRMember [Member]", "verboseLabel": "C000243070_ClassMember_1YRMember", "terseLabel": "C000243070_ClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_ClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_ClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_ClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000243070_ClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000243070_ClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000243070_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000243070_ClassMember_AsOf_2023Member", "terseLabel": "C000243070_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243070_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000243070_ClassMember_AsOf_2024Member", "terseLabel": "C000243070_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243070_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000243070_ClassMember_AsOf_2025Member", "terseLabel": "C000243070_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243070_LG_1_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_LG_1_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_LG_1_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243070_LG_1_AdditionalIndexMember_3YRMember", "terseLabel": "C000243070_LG_1_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_LG_2_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_LG_2_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_LG_2_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243070_LG_2_AdditionalIndexMember_3YRMember", "terseLabel": "C000243070_LG_2_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_LG_ClassMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_LG_ClassMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_LG_ClassMember_3YRMember [Member]", "verboseLabel": "C000243070_LG_ClassMember_3YRMember", "terseLabel": "C000243070_LG_ClassMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000243070_NoLoadClassMember_1YRMember", "terseLabel": "C000243070_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243070_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243070_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243070_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000243070_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000243070_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "fmr_C000243071Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071 [Member]", "verboseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class I", "terseLabel": "Fidelity Advisor Conservative Income Bond Fund - Class I" } } }, "auth_ref": [] }, "fmr_C000243071_0_AdditionalIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_0_AdditionalIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_0_AdditionalIndexMember_1YRMember [Member]", "verboseLabel": "C000243071_0_AdditionalIndexMember_1YRMember", "terseLabel": "C000243071_0_AdditionalIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_0_AdditionalIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_0_AdditionalIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_0_AdditionalIndexMember_LOCMember [Member]", "verboseLabel": "C000243071_0_AdditionalIndexMember_LOCMember", "terseLabel": "C000243071_0_AdditionalIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243071_1_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_1_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_1_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243071_1_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_1_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_1_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243071_1_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_1_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_1_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243071_1_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243071_1_BBIndexMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_1_BBIndexMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_1_BBIndexMember_1YRMember [Member]", "verboseLabel": "C000243071_1_BBIndexMember_1YRMember", "terseLabel": "C000243071_1_BBIndexMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_1_BBIndexMember_LOCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_1_BBIndexMember_LOCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_1_BBIndexMember_LOCMember [Member]", "verboseLabel": "C000243071_1_BBIndexMember_LOCMember", "terseLabel": "C000243071_1_BBIndexMember_LOCMember" } } }, "auth_ref": [] }, "fmr_C000243071_2_AdditionalIndexMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_2_AdditionalIndexMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_2_AdditionalIndexMember_AsOf_2023Member [Member]", "verboseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2023Member", "terseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243071_2_AdditionalIndexMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_2_AdditionalIndexMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_2_AdditionalIndexMember_AsOf_2024Member [Member]", "verboseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2024Member", "terseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243071_2_AdditionalIndexMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_2_AdditionalIndexMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_2_AdditionalIndexMember_AsOf_2025Member [Member]", "verboseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2025Member", "terseLabel": "C000243071_2_AdditionalIndexMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243071_ClassMember_AsOf_2023Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_ClassMember_AsOf_2023Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_ClassMember_AsOf_2023Member [Member]", "verboseLabel": "C000243071_ClassMember_AsOf_2023Member", "terseLabel": "C000243071_ClassMember_AsOf_2023Member" } } }, "auth_ref": [] }, "fmr_C000243071_ClassMember_AsOf_2024Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_ClassMember_AsOf_2024Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_ClassMember_AsOf_2024Member [Member]", "verboseLabel": "C000243071_ClassMember_AsOf_2024Member", "terseLabel": "C000243071_ClassMember_AsOf_2024Member" } } }, "auth_ref": [] }, "fmr_C000243071_ClassMember_AsOf_2025Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_ClassMember_AsOf_2025Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_ClassMember_AsOf_2025Member [Member]", "verboseLabel": "C000243071_ClassMember_AsOf_2025Member", "terseLabel": "C000243071_ClassMember_AsOf_2025Member" } } }, "auth_ref": [] }, "fmr_C000243071_LG_1_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_LG_1_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_LG_1_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243071_LG_1_AdditionalIndexMember_3YRMember", "terseLabel": "C000243071_LG_1_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_LG_2_AdditionalIndexMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_LG_2_AdditionalIndexMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_LG_2_AdditionalIndexMember_3YRMember [Member]", "verboseLabel": "C000243071_LG_2_AdditionalIndexMember_3YRMember", "terseLabel": "C000243071_LG_2_AdditionalIndexMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_LG_ClassMember_3YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_LG_ClassMember_3YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_LG_ClassMember_3YRMember [Member]", "verboseLabel": "C000243071_LG_ClassMember_3YRMember", "terseLabel": "C000243071_LG_ClassMember_3YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_NoLoadClassMember_1YRMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_NoLoadClassMember_1YRMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_NoLoadClassMember_1YRMember [Member]", "verboseLabel": "C000243071_NoLoadClassMember_1YRMember", "terseLabel": "C000243071_NoLoadClassMember_1YRMember" } } }, "auth_ref": [] }, "fmr_C000243071_NoLoadClassMember_2024-09-01_2025-08-31Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "C000243071_NoLoadClassMember_2024-09-01_2025-08-31Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "C000243071_NoLoadClassMember_2024-09-01_2025-08-31Member [Member]", "verboseLabel": "C000243071_NoLoadClassMember_2024-09-01_2025-08-31Member", "terseLabel": "C000243071_NoLoadClassMember_2024-09-01_2025-08-31Member" } } }, "auth_ref": [] }, "country_CA": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "CA", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Canada", "terseLabel": "Canada" } } }, "auth_ref": [] }, "oef_ClassAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ClassAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Class [Axis]" } } }, "auth_ref": [ "r20" ] }, "oef_ClassName": { "xbrltype": "securityTitleItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ClassName", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Class Name" } } }, "auth_ref": [ "r25" ] }, "oef_Component1OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "Component1OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "lang": { "en-us": { "role": { "label": "Component1 Other Expenses" } } }, "auth_ref": [ "r64" ] }, "oef_Component2OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "Component2OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "lang": { "en-us": { "role": { "label": "Component2 Other Expenses" } } }, "auth_ref": [ "r64" ] }, "oef_Component3OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "Component3OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_OtherExpensesOverAssets", "weight": 1.0, "order": 3.0 } }, "lang": { "en-us": { "role": { "label": "Component3 Other Expenses" } } }, "auth_ref": [ "r64" ] }, "dei_CoverAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "CoverAbstract", "lang": { "en-us": { "role": { "documentation": "Cover page." } } }, "auth_ref": [] }, "oef_CreditQualityAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "CreditQualityAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Credit Quality [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_CreditQualityDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "CreditQualityDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Credit Quality [Domain]" } } }, "auth_ref": [ "r48" ] }, "oef_CreditQualityExplanationTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "CreditQualityExplanationTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Credit Quality Explanation [Text Block]" } } }, "auth_ref": [ "r48" ] }, "oef_CreditRatingsSelectionTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "CreditRatingsSelectionTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Credit Ratings Selection [Text Block]" } } }, "auth_ref": [ "r48" ] }, "country_DE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "DE", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Germany", "terseLabel": "Germany" } } }, "auth_ref": [] }, "oef_DistOfCapitalTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "DistOfCapitalTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Distribution of Capital [Text Block]" } } }, "auth_ref": [ "r42" ] }, "oef_DistributionAndService12b1FeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "DistributionAndService12b1FeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "lang": { "en-us": { "role": { "label": "Distribution and Service (12b-1) Fees" } } }, "auth_ref": [ "r62" ] }, "oef_DistributionOrSimilarNon12b1FeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "DistributionOrSimilarNon12b1FeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 3.0 } }, "lang": { "en-us": { "role": { "label": "Distribution or Similar (Non 12b-1) Fees" } } }, "auth_ref": [ "r62" ] }, "dei_DocumentPeriodEndDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentPeriodEndDate", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Document Period End Date", "documentation": "For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD." } } }, "auth_ref": [] }, "dei_DocumentType": { "xbrltype": "submissionTypeItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "DocumentType", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Document Type", "documentation": "The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'." } } }, "auth_ref": [] }, "country_ES": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "ES", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Spain", "terseLabel": "Spain" } } }, "auth_ref": [] }, "dei_EntityCentralIndexKey": { "xbrltype": "centralIndexKeyItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityCentralIndexKey", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Entity Central Index Key", "documentation": "A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK." } } }, "auth_ref": [ "r18" ] }, "dei_EntityDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Series", "documentation": "All the names of the entities being reported upon in a document. Any legal structure used to conduct activities or to hold assets. Some examples of such structures are corporations, partnerships, limited liability companies, grantor trusts, and other trusts. This item does not include business and geographical segments which are included in the geographical or business segments domains." } } }, "auth_ref": [] }, "dei_EntityInvCompanyType": { "xbrltype": "invCompanyType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityInvCompanyType", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Entity Investment Company Type", "documentation": "One of: N-1A (Mutual Fund), N-1 (Open-End Separate Account with No Variable Annuities), N-2 (Closed-End Investment Company), N-3 (Separate Account Registered as Open-End Management Investment Company), N-4 (Variable Annuity UIT Separate Account), N-5 (Small Business Investment Company), N-6 (Variable Life UIT Separate Account), S-1 or S-3 (Face Amount Certificate Company), S-6 (UIT, Non-Insurance Product)." } } }, "auth_ref": [ "r70" ] }, "dei_EntityRegistrantName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "EntityRegistrantName", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Registrant Name", "documentation": "The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC." } } }, "auth_ref": [ "r18" ] }, "oef_EtfDiscountNumDays": { "xbrltype": "integerItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "EtfDiscountNumDays", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "ETF Discount, Number of Days" } } }, "auth_ref": [ "r43" ] }, "oef_EtfPastPerfTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "EtfPastPerfTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "ETF Past Performance [Text Block]" } } }, "auth_ref": [ "r45" ] }, "oef_EtfPremiumDiscountTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "EtfPremiumDiscountTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "ETF Premium Discount [Text Block]" } } }, "auth_ref": [ "r43" ] }, "oef_EtfPremiumNumDays": { "xbrltype": "integerItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "EtfPremiumNumDays", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "ETF Premium, Number of Days" } } }, "auth_ref": [ "r43" ] }, "oef_EtfPurchaseExplanationTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "EtfPurchaseExplanationTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "ETF Purchase Explanation [Text Block]" } } }, "auth_ref": [ "r44" ] }, "oef_ExpenseRatioPct": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpenseRatioPct", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expense Ratio, Percent" } } }, "auth_ref": [ "r28" ] }, "oef_ExpensesExclExtraordinaryExpensesPct": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesExclExtraordinaryExpensesPct", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expenses Excluding Extraordinary Expenses, Percent" } } }, "auth_ref": [ "r31" ] }, "oef_ExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_NetExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "lang": { "en-us": { "role": { "label": "Expenses (as a percentage of Assets)", "totalLabel": "Total Expenses" } } }, "auth_ref": [ "r65" ] }, "oef_ExpensesPaidAmt": { "xbrltype": "monetaryItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesPaidAmt", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expenses Paid, Amount" } } }, "auth_ref": [ "r27" ] }, "oef_ExpensesRepresentBothMasterAndFeeder": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesRepresentBothMasterAndFeeder", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expenses Represent Both Master and Feeder [Text]" } } }, "auth_ref": [ "r29", "r59" ] }, "oef_ExpensesShortPeriodFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesShortPeriodFnTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expenses Short Period Footnote [Text Block]" } } }, "auth_ref": [ "r30" ] }, "oef_ExpensesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExpensesTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Expenses [Text Block]" } } }, "auth_ref": [ "r26" ] }, "oef_ExposureBasisExplanationTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExposureBasisExplanationTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Exposure Basis Explanation [Text Block]" } } }, "auth_ref": [ "r48" ] }, "oef_ExtraordinaryExpensesFnTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ExtraordinaryExpensesFnTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Extraordinary Expenses Footnote [Text Block]" } } }, "auth_ref": [ "r31" ] }, "country_FR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "FR", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "France", "terseLabel": "France" } } }, "auth_ref": [] }, "oef_FactorsAffectingPerfTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "FactorsAffectingPerfTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Factors Affecting Performance [Text Block]" } } }, "auth_ref": [ "r32" ] }, "oef_FeeWaiverOrReimbursementOverAssets": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "FeeWaiverOrReimbursementOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_NetExpensesOverAssets", "weight": 1.0, "order": 2.0 } }, "lang": { "en-us": { "role": { "label": "Fee Waiver or Reimbursement", "negatedLabel": "Fee Waiver or Reimbursement" } } }, "auth_ref": [ "r66" ] }, "oef_FundName": { "xbrltype": "normalizedStringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "FundName", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Fund Name" } } }, "auth_ref": [ "r21" ] }, "country_GB": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "GB", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "United Kingdom", "terseLabel": "United Kingdom" } } }, "auth_ref": [] }, "oef_GeographicRegionAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "GeographicRegionAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Geographic Region [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_GeographicRegionDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "GeographicRegionDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Geographic Region [Domain]" } } }, "auth_ref": [ "r48" ] }, "fmr_GrandCaymanUKOverseasTerMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "GrandCaymanUKOverseasTerMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "GrandCaymanUKOverseasTerMember" } } }, "auth_ref": [] }, "oef_HoldingsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "HoldingsAbstract", "lang": { "en-us": { "role": { "label": "Holdings [Abstract]" } } }, "auth_ref": [ "r48" ] }, "oef_HoldingsCount": { "xbrltype": "integerItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "HoldingsCount", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Holdings Count" } } }, "auth_ref": [ "r46" ] }, "oef_HoldingsLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "HoldingsLineItems", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Holdings [Line Items]" } } }, "auth_ref": [ "r48" ] }, "oef_HoldingsTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "HoldingsTable", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Holdings [Table]" } } }, "auth_ref": [ "r48" ] }, "oef_HoldingsTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "HoldingsTableTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Holdings [Text Block]" } } }, "auth_ref": [ "r48" ] }, "country_IE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "IE", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Ireland", "terseLabel": "Ireland" } } }, "auth_ref": [] }, "country_IT": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "IT", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Italy", "terseLabel": "Italy" } } }, "auth_ref": [] }, "oef_InabilityToMeetDistLevelTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "InabilityToMeetDistLevelTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Inability to Meet Distribution Level [Text Block]" } } }, "auth_ref": [ "r42" ] }, "oef_IndustrySectorAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "IndustrySectorAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Industry Sector [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_IndustrySectorDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "IndustrySectorDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Industry Sector [Domain]" } } }, "auth_ref": [ "r48" ] }, "us-gaap_InvestmentCompanyPortfolioTurnover": { "xbrltype": "percentItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "InvestmentCompanyPortfolioTurnover", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "documentation": "Percentage of lesser of purchase or sale of portfolio securities to average value of portfolio securities owned.", "label": "Investment Company Portfolio Turnover" } } }, "auth_ref": [ "r71" ] }, "us-gaap_InvestmentTypeAxis": { "xbrltype": "stringItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "InvestmentTypeAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "documentation": "Information by type of investments.", "label": "Investment Type [Axis]" } } }, "auth_ref": [ "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17" ] }, "us-gaap_InvestmentTypeCategorizationMember": { "xbrltype": "domainItemType", "nsuri": "http://fasb.org/us-gaap/2024", "localname": "InvestmentTypeCategorizationMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "documentation": "Asset obtained to generate income or appreciate in value.", "label": "Investment Type Categorization [Member]" } } }, "auth_ref": [ "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17" ] }, "country_JP": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "JP", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Japan", "terseLabel": "Japan" } } }, "auth_ref": [] }, "country_KR": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "KR", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Korea, Republic of", "terseLabel": "Korea, Republic of" } } }, "auth_ref": [] }, "oef_LargestHoldingAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "LargestHoldingAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Largest Holding [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_LargestHoldingsDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "LargestHoldingsDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Largest Holdings [Domain]" } } }, "auth_ref": [ "r48" ] }, "oef_LargestHoldingsTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "LargestHoldingsTableTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Largest Holdings [Text Block]" } } }, "auth_ref": [ "r48" ] }, "dei_LegalEntityAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "LegalEntityAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Series [Axis]", "documentation": "The set of legal entities associated with a report." } } }, "auth_ref": [] }, "oef_LineGraphAndTableMeasureName": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "LineGraphAndTableMeasureName", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Line Graph and Table Measure Name" } } }, "auth_ref": [ "r34" ] }, "oef_LineGraphTableTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "LineGraphTableTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Line Graph [Table Text Block]" } } }, "auth_ref": [ "r33" ] }, "country_MX": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "MX", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Mexico", "terseLabel": "Mexico" } } }, "auth_ref": [] }, "oef_ManagementFeesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ManagementFeesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 1.0 } }, "lang": { "en-us": { "role": { "label": "Management Fees (as a percentage of Assets)" } } }, "auth_ref": [ "r61" ] }, "oef_MaterialChngDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialChngDate", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Change Date" } } }, "auth_ref": [ "r38" ] }, "oef_MaterialChngDescriptionTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialChngDescriptionTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Change Description [Text Block]" } } }, "auth_ref": [ "r38" ] }, "oef_MaterialFundChngAdviserTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngAdviserTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Adviser [Text Block]" } } }, "auth_ref": [ "r55" ] }, "oef_MaterialFundChngExpensesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngExpensesTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Expenses [Text Block]" } } }, "auth_ref": [ "r52" ] }, "oef_MaterialFundChngNameTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngNameTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Name [Text Block]" } } }, "auth_ref": [ "r50" ] }, "oef_MaterialFundChngNoticeTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngNoticeTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Notice [Text Block]" } } }, "auth_ref": [ "r24" ] }, "oef_MaterialFundChngObjectivesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngObjectivesTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Objectives [Text Block]" } } }, "auth_ref": [ "r51" ] }, "oef_MaterialFundChngRisksChngTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngRisksChngTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Risks Change [Text Block]" } } }, "auth_ref": [ "r54" ] }, "oef_MaterialFundChngStrategiesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngStrategiesTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change Strategies [Text Block]" } } }, "auth_ref": [ "r53" ] }, "oef_MaterialFundChngTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaterialFundChngTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Material Fund Change [Text Block]" } } }, "auth_ref": [ "r49" ] }, "oef_MaturityAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaturityAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Maturity [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_MaturityDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "MaturityDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Maturity [Domain]" } } }, "auth_ref": [ "r48" ] }, "fmr_MultinationalMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "MultinationalMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "MultinationalMember" } } }, "auth_ref": [] }, "country_NL": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "NL", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Netherlands", "terseLabel": "Netherlands" } } }, "auth_ref": [] }, "country_NO": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "NO", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Norway", "terseLabel": "Norway" } } }, "auth_ref": [] }, "oef_NetExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "NetExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": null, "weight": null, "order": null, "root": true } }, "lang": { "en-us": { "role": { "label": "Net Expenses (as a percentage of Assets)", "totalLabel": "Net Expenses" } } }, "auth_ref": [ "r60" ] }, "oef_NoDeductionOfTaxesTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "NoDeductionOfTaxesTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "No Deduction of Taxes [Text Block]" } } }, "auth_ref": [ "r35" ] }, "dei_NoTradingSymbolFlag": { "xbrltype": "trueItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "NoTradingSymbolFlag", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "No Trading Symbol Flag", "documentation": "Boolean flag that is true only for a security having no trading symbol." } } }, "auth_ref": [] }, "oef_OefDeprecatedConceptsAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OefDeprecatedConceptsAbstract", "lang": { "en-us": { "role": { "label": "Deprecated OEF Concepts [Abstract]" } } }, "auth_ref": [] }, "oef_OtherCategory1Axis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OtherCategory1Axis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Other Category 1 [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_OtherCategory1Domain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OtherCategory1Domain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Other Category 1 [Domain]" } } }, "auth_ref": [ "r48" ] }, "oef_OtherCategory2Axis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OtherCategory2Axis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Other Category 2 [Axis]" } } }, "auth_ref": [ "r48" ] }, "oef_OtherCategory2Domain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OtherCategory2Domain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Other Category 2 [Domain]" } } }, "auth_ref": [ "r48" ] }, "oef_OtherExpensesOverAssets": { "xbrltype": "nonNegativePure4ItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "OtherExpensesOverAssets", "calculation": { "http://xbrl.sec.gov/rr/role/OperatingExpensesData": { "parentTag": "oef_ExpensesOverAssets", "weight": 1.0, "order": 4.0 } }, "lang": { "en-us": { "role": { "label": "Other Expenses (as a percentage of Assets):", "totalLabel": "Other Expenses" } } }, "auth_ref": [ "r63" ] }, "fmr_OtherMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "OtherMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "OtherMember" } } }, "auth_ref": [] }, "oef_PctOfNav": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfNav", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Net Asset Value" } } }, "auth_ref": [ "r48" ] }, "oef_PctOfNetLongExposure": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfNetLongExposure", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Net Long Exposure" } } }, "auth_ref": [ "r48" ] }, "oef_PctOfNetShortExposure": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfNetShortExposure", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Net Short Exposure" } } }, "auth_ref": [ "r48" ] }, "oef_PctOfTotalInv": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfTotalInv", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Total Investments" } } }, "auth_ref": [ "r48" ] }, "oef_PctOfTotalLongExposure": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfTotalLongExposure", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Total Long Exposure" } } }, "auth_ref": [ "r48" ] }, "oef_PctOfTotalShortExposure": { "xbrltype": "percentItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PctOfTotalShortExposure", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Percent of Total Short Exposure" } } }, "auth_ref": [ "r48" ] }, "oef_PerfInceptionDate": { "xbrltype": "dateItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PerfInceptionDate", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Performance Inception Date" } } }, "auth_ref": [ "r34" ] }, "oef_PerfTableMarketIndexChngdTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PerfTableMarketIndexChngdTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Performance Table Market Index Changed [Text Block]" } } }, "auth_ref": [ "r41" ] }, "oef_PerformancePastDoesNotIndicateFuture": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PerformancePastDoesNotIndicateFuture", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Performance Past Does Not Indicate Future [Text]" } } }, "auth_ref": [ "r36", "r68" ] }, "oef_PreviousInvestmentAdviserTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PreviousInvestmentAdviserTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Previous Investment Adviser [Text Block]" } } }, "auth_ref": [ "r37" ] }, "oef_PriorMarketIndexComparisonTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "PriorMarketIndexComparisonTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Prior Market Index Comparison [Text Block]" } } }, "auth_ref": [ "r41" ] }, "fmr_QDAAAMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDAAAMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDAAAMember [Member]", "verboseLabel": "QDAAAMember", "terseLabel": "QDAAAMember" } } }, "auth_ref": [] }, "fmr_QDAAMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDAAMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDAAMember [Member]", "verboseLabel": "QDAAMember", "terseLabel": "QDAAMember" } } }, "auth_ref": [] }, "fmr_QDAMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDAMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDAMember [Member]", "verboseLabel": "QDAMember", "terseLabel": "QDAMember" } } }, "auth_ref": [] }, "fmr_QDBBBMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDBBBMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDBBBMember [Member]", "verboseLabel": "QDBBBMember", "terseLabel": "QDBBBMember" } } }, "auth_ref": [] }, "fmr_QDBBMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDBBMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDBBMember [Member]", "verboseLabel": "QDBBMember", "terseLabel": "QDBBMember" } } }, "auth_ref": [] }, "fmr_QDBMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDBMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDBMember [Member]", "verboseLabel": "QDBMember", "terseLabel": "QDBMember" } } }, "auth_ref": [] }, "fmr_QDCCCCCCMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDCCCCCCMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDCCCCCCMember [Member]", "verboseLabel": "QDCCCCCCMember", "terseLabel": "QDCCCCCCMember" } } }, "auth_ref": [] }, "fmr_QDDMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDDMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDDMember [Member]", "verboseLabel": "QDDMember", "terseLabel": "QDDMember" } } }, "auth_ref": [] }, "fmr_QDEquitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDEquitiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDEquitiesMember [Member]", "verboseLabel": "QDEquitiesMember", "terseLabel": "QDEquitiesMember" } } }, "auth_ref": [] }, "fmr_QDNotRatedMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDNotRatedMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDNotRatedMember [Member]", "verboseLabel": "QDNotRatedMember", "terseLabel": "QDNotRatedMember" } } }, "auth_ref": [] }, "fmr_QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember [Member]", "verboseLabel": "QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember", "terseLabel": "QDShortTermInvestmentsandNetOtherAssetsLiabilitiesMember" } } }, "auth_ref": [] }, "fmr_QDUSGovernmentandUSGovernmentAgencyObligationsMember": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "QDUSGovernmentandUSGovernmentAgencyObligationsMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "QDUSGovernmentandUSGovernmentAgencyObligationsMember [Member]", "verboseLabel": "QDUSGovernmentandUSGovernmentAgencyObligationsMember", "terseLabel": "QDUSGovernmentandUSGovernmentAgencyObligationsMember" } } }, "auth_ref": [] }, "country_SE": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "SE", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "Sweden", "terseLabel": "Sweden" } } }, "auth_ref": [] }, "oef_SalesLoadAxis": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "SalesLoadAxis", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Sales Load [Axis]" } } }, "auth_ref": [ "r40" ] }, "dei_SecurityExchangeName": { "xbrltype": "edgarExchangeCodeItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "SecurityExchangeName", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Security Exchange Name", "terseLabel": "Exchange", "documentation": "Name of the Exchange on which a security is registered." } } }, "auth_ref": [ "r19" ] }, "oef_ShareClassDomain": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ShareClassDomain", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport", "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails", "http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" ], "lang": { "en-us": { "role": { "label": "Share Classes" } } }, "auth_ref": [ "r20" ] }, "oef_ShareholderReportAbstract": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ShareholderReportAbstract", "lang": { "en-us": { "role": { "label": "Shareholder Report [Abstract]" } } }, "auth_ref": [ "r40" ] }, "oef_ShareholderReportAnnualOrSemiAnnual": { "xbrltype": "shareholderReportTypeItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ShareholderReportAnnualOrSemiAnnual", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Shareholder Report Annual or Semi-Annual" } } }, "auth_ref": [ "r22" ] }, "oef_ShareholderReportLineItems": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ShareholderReportLineItems", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Shareholder Report [Line Items]" } } }, "auth_ref": [ "r40" ] }, "oef_ShareholderReportTable": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "ShareholderReportTable", "presentation": [ "http://xbrl.sec.gov/oef/role/NcsrCover", "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Shareholder Report [Table]" } } }, "auth_ref": [ "r40" ] }, "oef_SummaryOfChngLegendTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "SummaryOfChngLegendTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Summary of Change Legend [Text Block]" } } }, "auth_ref": [ "r56" ] }, "fmr_TH0Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH0Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH0Member [Member]", "verboseLabel": "TH0Member", "terseLabel": "TH0Member" } } }, "auth_ref": [] }, "fmr_TH1Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH1Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH1Member [Member]", "verboseLabel": "TH1Member", "terseLabel": "TH1Member" } } }, "auth_ref": [] }, "fmr_TH2Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH2Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH2Member [Member]", "verboseLabel": "TH2Member", "terseLabel": "TH2Member" } } }, "auth_ref": [] }, "fmr_TH3Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH3Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH3Member [Member]", "verboseLabel": "TH3Member", "terseLabel": "TH3Member" } } }, "auth_ref": [] }, "fmr_TH4Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH4Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH4Member [Member]", "verboseLabel": "TH4Member", "terseLabel": "TH4Member" } } }, "auth_ref": [] }, "fmr_TH5Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH5Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH5Member [Member]", "verboseLabel": "TH5Member", "terseLabel": "TH5Member" } } }, "auth_ref": [] }, "fmr_TH6Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH6Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH6Member [Member]", "verboseLabel": "TH6Member", "terseLabel": "TH6Member" } } }, "auth_ref": [] }, "fmr_TH7Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH7Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH7Member [Member]", "verboseLabel": "TH7Member", "terseLabel": "TH7Member" } } }, "auth_ref": [] }, "fmr_TH8Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH8Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH8Member [Member]", "verboseLabel": "TH8Member", "terseLabel": "TH8Member" } } }, "auth_ref": [] }, "fmr_TH9Member": { "xbrltype": "domainItemType", "nsuri": "http://www.fidelity.com/20251030", "localname": "TH9Member", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "TH9Member [Member]", "verboseLabel": "TH9Member", "terseLabel": "TH9Member" } } }, "auth_ref": [] }, "dei_TradingSymbol": { "xbrltype": "tradingSymbolItemType", "nsuri": "http://xbrl.sec.gov/dei/2024", "localname": "TradingSymbol", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Trading Symbol", "terseLabel": "Ticker", "documentation": "Trading symbol of an instrument as listed on an exchange." } } }, "auth_ref": [] }, "country_US": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/country/2024", "localname": "US", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" ], "lang": { "en-us": { "role": { "label": "United States", "terseLabel": "United States" } } }, "auth_ref": [] }, "oef_UpdPerfInfoLocationTextBlock": { "xbrltype": "textBlockItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "UpdPerfInfoLocationTextBlock", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Updated Performance Information Location [Text Block]" } } }, "auth_ref": [ "r39" ] }, "oef_UpdProspectusEmailAddress": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "UpdProspectusEmailAddress", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Updated Prospectus Email Address" } } }, "auth_ref": [ "r56" ] }, "oef_UpdProspectusPhoneNumber": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "UpdProspectusPhoneNumber", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Updated Prospectus Phone Number" } } }, "auth_ref": [ "r56" ] }, "oef_UpdProspectusWebAddress": { "xbrltype": "stringItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "UpdProspectusWebAddress", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReport" ], "lang": { "en-us": { "role": { "label": "Updated Prospectus Web Address" } } }, "auth_ref": [ "r56" ] }, "oef_WithSalesLoadMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "WithSalesLoadMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "With Sales Load [Member]" } } }, "auth_ref": [ "r40" ] }, "oef_WithoutSalesLoadMember": { "xbrltype": "domainItemType", "nsuri": "http://xbrl.sec.gov/oef/2024q3", "localname": "WithoutSalesLoadMember", "presentation": [ "http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" ], "lang": { "en-us": { "role": { "label": "Without Sales Load [Member]" } } }, "auth_ref": [ "r40" ] } } } }, "std_ref": { "r0": { "role": "http://fasb.org/us-gaap/role/ref/legacyRef", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "1", "SubTopic": "30", "Topic": "205", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147479910/205-30-50-1" }, "r1": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "1", "Subparagraph": "(b)(1)", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478795/946-210-50-1" }, "r2": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "1", "Subparagraph": "(c)(1)", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478795/946-210-50-1" }, "r3": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "1", "Subparagraph": "(c)(2)", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478795/946-210-50-1" }, "r4": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "6", "Subparagraph": "(a)(1)", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478795/946-210-50-6" }, "r5": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "6", "Subparagraph": "(c)", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478795/946-210-50-6" }, "r6": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "1", "Subparagraph": "(SX 210.12-12(Column A)(Footnote 1))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-1" }, "r7": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "1", "Subparagraph": "(SX 210.12-12(Column C)(Footnote 5))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-1" }, "r8": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "2", "Subparagraph": "(SX 210.12-12A(Column C)(Footnote 4))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-2" }, "r9": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "3", "Subparagraph": "(SX 210.12-12B(Column A)(Footnote 7))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-3" }, "r10": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "3", "Subparagraph": "(SX 210.12-12B(Column C)(Footnote 2))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-3" }, "r11": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "5D", "Subparagraph": "(SX 210.12-13D(Column A)(Footnote 2)(i))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-5D" }, "r12": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "6", "Subparagraph": "(SX 210.12-14(Column F)(Footnote 7))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-6" }, "r13": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "7", "Subparagraph": "(SX 210.12-15(Column A))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-7" }, "r14": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "7", "Subparagraph": "(SX 210.12-15(Column B))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-7" }, "r15": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "7", "Subparagraph": "(SX 210.12-15(Column C))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-7" }, "r16": { "role": "http://www.xbrl.org/2003/role/disclosureRef", "Topic": "946", "SubTopic": "320", "Name": "Accounting Standards Codification", "Section": "S99", "Paragraph": "7", "Subparagraph": "(SX 210.12-15(Column D))", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477271/946-320-S99-7" }, "r17": { "role": "http://www.xbrl.org/2003/role/exampleRef", "Topic": "946", "SubTopic": "210", "Name": "Accounting Standards Codification", "Section": "55", "Paragraph": "1", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147477439/946-210-55-1" }, "r18": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "b-2" }, "r19": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Exchange Act", "Number": "240", "Section": "12", "Subsection": "d1-1" }, "r20": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "1", "Subsection": "a", "Paragraph": "1" }, "r21": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "b", "Paragraph": "1" }, "r22": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "b", "Paragraph": "3" }, "r23": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "b", "Paragraph": "4" }, "r24": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "b", "Paragraph": "5" }, "r25": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "b", "Paragraph": "instruction", "Subparagraph": "2" }, "r26": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c" }, "r27": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c", "Paragraph": "ii" }, "r28": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c", "Paragraph": "iii" }, "r29": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c", "Paragraph": "instruction", "Sentence": "1", "Clause": "b" }, "r30": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c", "Paragraph": "instruction", "Subparagraph": "1", "Clause": "c" }, "r31": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "c", "Paragraph": "instruction", "Subparagraph": "1", "Clause": "d" }, "r32": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "1" }, "r33": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2" }, "r34": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "i" }, "r35": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "iii", "Clause": "B" }, "r36": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "iiii", "Clause": "A" }, "r37": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "12" }, "r38": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "14" }, "r39": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "15" }, "r40": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "7" }, "r41": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "2", "Subparagraph": "instruction", "Clause": "8" }, "r42": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "3" }, "r43": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "4" }, "r44": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "4", "Subparagraph": "instruction", "Clause": "3" }, "r45": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "d", "Paragraph": "4", "Subparagraph": "instruction", "Clause": "4" }, "r46": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "e" }, "r47": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "e", "Paragraph": "instruction", "Subparagraph": "6" }, "r48": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "f" }, "r49": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g" }, "r50": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "1" }, "r51": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "2" }, "r52": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "3" }, "r53": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "4" }, "r54": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "5" }, "r55": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "6" }, "r56": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "g", "Paragraph": "instruction", "Subparagraph": "2" }, "r57": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "h", "Paragraph": "1" }, "r58": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "27A", "Subsection": "h", "Paragraph": "2" }, "r59": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "1", "Subparagraph": "d", "Sentence": "i" }, "r60": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3" }, "r61": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "a" }, "r62": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "b" }, "r63": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "c", "Sentence": "i" }, "r64": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "c", "Sentence": "iii" }, "r65": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "d" }, "r66": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "e" }, "r67": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "3", "Subsection": "instruction", "Paragraph": "3", "Subparagraph": "f", "Sentence": "i" }, "r68": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "i" }, "r69": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Form N-1A", "Section": "4", "Subsection": "b", "Paragraph": "2", "Subparagraph": "iii" }, "r70": { "role": "http://www.xbrl.org/2003/role/presentationRef", "Publisher": "SEC", "Name": "Regulation S-T", "Number": "232", "Section": "313" }, "r71": { "role": "http://www.xbrl.org/2009/role/commonPracticeRef", "Topic": "946", "SubTopic": "205", "Name": "Accounting Standards Codification", "Section": "50", "Paragraph": "27", "Publisher": "FASB", "URI": "https://asc.fasb.org/1943274/2147478494/946-205-50-27" } } }