| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.22.2 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 398 </ContextCount> |
| <ElementCount> 273 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 98 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 8 </UnitCount> |
| <MyReports> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 0001001 - Document - Cover </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/Cover </Role> |
| | | <ShortName> Cover </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 1001002 - Statement - CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - UNAUDITED </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFOPERATIONSUNAUDITED </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - UNAUDITED </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 1002003 - Statement - CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - UNAUDITED </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFCOMPREHENSIVEINCOMELOSSUNAUDITED </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - UNAUDITED </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 1003004 - Statement - CONDENSED CONSOLIDATED BALANCE SHEET - UNAUDITED </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETUNAUDITED </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED BALANCE SHEET - UNAUDITED </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 1004005 - Statement - CONDENSED CONSOLIDATED BALANCE SHEET - Unaudited (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETUnauditedParenthetical </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED BALANCE SHEET - Unaudited (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 1005006 - Statement - CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - UNAUDITED </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFCASHFLOWSUNAUDITED </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - UNAUDITED </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 1006007 - Statement - CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - UNAUDITED </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFCHANGESINEQUITYUNAUDITED </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - UNAUDITED </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 1407401 - Statement - CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - UNAUDITED (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFCHANGESINEQUITYUNAUDITEDParenthetical </Role> |
| | | <ShortName> CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - UNAUDITED (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 2101101 - Disclosure - Principles of Consolidation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/PrinciplesofConsolidation </Role> |
| | | <ShortName> Principles of Consolidation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 2103102 - Disclosure - Recent Accounting Pronouncements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/RecentAccountingPronouncements </Role> |
| | | <ShortName> Recent Accounting Pronouncements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 2105103 - Disclosure - Earnings Per Share </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/EarningsPerShare </Role> |
| | | <ShortName> Earnings Per Share </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 2109104 - Disclosure - Operating Information by Segment and Geographic Area </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicArea </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 2116105 - Disclosure - Impairment </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/Impairment </Role> |
| | | <ShortName> Impairment </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 2120106 - Disclosure - Income Taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/IncomeTaxes </Role> |
| | | <ShortName> Income Taxes </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 2124107 - Disclosure - Partnerships and Joint Ventures </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/PartnershipsandJointVentures </Role> |
| | | <ShortName> Partnerships and Joint Ventures </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 2126108 - Disclosure - Guarantees </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/Guarantees </Role> |
| | | <ShortName> Guarantees </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 2128109 - Disclosure - Contingencies and Commitments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ContingenciesandCommitments </Role> |
| | | <ShortName> Contingencies and Commitments </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 2130110 - Disclosure - Contract Assets and Liabilities </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ContractAssetsandLiabilities </Role> |
| | | <ShortName> Contract Assets and Liabilities </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 2133111 - Disclosure - Remaining Unsatisfied Performance Obligations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/RemainingUnsatisfiedPerformanceObligations </Role> |
| | | <ShortName> Remaining Unsatisfied Performance Obligations </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 2136112 - Disclosure - Debt and Letters of Credit </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DebtandLettersofCredit </Role> |
| | | <ShortName> Debt and Letters of Credit </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 2140113 - Disclosure - Convertible Preferred Stock </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ConvertiblePreferredStock </Role> |
| | | <ShortName> Convertible Preferred Stock </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 2142114 - Disclosure - Fair Value Measurements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/FairValueMeasurements </Role> |
| | | <ShortName> Fair Value Measurements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 2146115 - Disclosure - Stock-Based Compensation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/StockBasedCompensation </Role> |
| | | <ShortName> Stock-Based Compensation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 2151116 - Disclosure - Other Comprehensive Income (Loss) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OtherComprehensiveIncomeLoss </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 2156117 - Disclosure - Discontinued Operations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DiscontinuedOperations </Role> |
| | | <ShortName> Discontinued Operations </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 2204201 - Disclosure - Recent Accounting Pronouncements (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/RecentAccountingPronouncementsPolicies </Role> |
| | | <ShortName> Recent Accounting Pronouncements (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/RecentAccountingPronouncements </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 2306301 - Disclosure - Earnings Per Share (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/EarningsPerShareTables </Role> |
| | | <ShortName> Earnings Per Share (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/EarningsPerShare </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 2310302 - Disclosure - Operating Information by Segment and Geographic Area (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaTables </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicArea </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 2317303 - Disclosure - Impairment (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ImpairmentTables </Role> |
| | | <ShortName> Impairment (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/Impairment </ParentRole> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 2321304 - Disclosure - Income Taxes (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/IncomeTaxesTables </Role> |
| | | <ShortName> Income Taxes (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/IncomeTaxes </ParentRole> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 2331305 - Disclosure - Contract Assets and Liabilities (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ContractAssetsandLiabilitiesTables </Role> |
| | | <ShortName> Contract Assets and Liabilities (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/ContractAssetsandLiabilities </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 2334306 - Disclosure - Remaining Unsatisfied Performance Obligations (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/RemainingUnsatisfiedPerformanceObligationsTables </Role> |
| | | <ShortName> Remaining Unsatisfied Performance Obligations (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/RemainingUnsatisfiedPerformanceObligations </ParentRole> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 2337307 - Disclosure - Debt and Letters of Credit (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DebtandLettersofCreditTables </Role> |
| | | <ShortName> Debt and Letters of Credit (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/DebtandLettersofCredit </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 2343308 - Disclosure - Fair Value Measurements (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/FairValueMeasurementsTables </Role> |
| | | <ShortName> Fair Value Measurements (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/FairValueMeasurements </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 2347309 - Disclosure - Stock-Based Compensation (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/StockBasedCompensationTables </Role> |
| | | <ShortName> Stock-Based Compensation (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/StockBasedCompensation </ParentRole> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 2352310 - Disclosure - Other Comprehensive Income (Loss) (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OtherComprehensiveIncomeLossTables </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OtherComprehensiveIncomeLoss </ParentRole> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 2357311 - Disclosure - Discontinued Operations (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DiscontinuedOperationsTables </Role> |
| | | <ShortName> Discontinued Operations (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/DiscontinuedOperations </ParentRole> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 2402402 - Disclosure - Principles of Consolidation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/PrinciplesofConsolidationDetails </Role> |
| | | <ShortName> Principles of Consolidation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/PrinciplesofConsolidation </ParentRole> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 2407403 - Disclosure - Earnings Per Share (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/EarningsPerShareDetails </Role> |
| | | <ShortName> Earnings Per Share (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/EarningsPerShareTables </ParentRole> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 2408404 - Disclosure - Earnings Per Share - Antidilutive Securities Excluded from Computation of EPS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/EarningsPerShareAntidilutiveSecuritiesExcludedfromComputationofEPSDetails </Role> |
| | | <ShortName> Earnings Per Share - Antidilutive Securities Excluded from Computation of EPS (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 2411405 - Disclosure - Operating Information by Segment and Geographic Area - Reportable Segments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaReportableSegmentsDetails </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area - Reportable Segments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 2412406 - Disclosure - Operating Information by Segment and Geographic Area - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaNarrativeDetails </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaTables </ParentRole> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 2413407 - Disclosure - Operating Information by Segment and Geographic Area - Other Segment Profit (Loss) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaOtherSegmentProfitLossDetails </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area - Other Segment Profit (Loss) (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 2414408 - Disclosure - Operating Information by Segment and Geographic Area - Total Assets (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaTotalAssetsDetails </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area - Total Assets (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 2415409 - Disclosure - Operating Information by Segment and Geographic Area - External Revenue and Total Assets by Geographic Area (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OperatingInformationbySegmentandGeographicAreaExternalRevenueandTotalAssetsbyGeographicAreaDetails </Role> |
| | | <ShortName> Operating Information by Segment and Geographic Area - External Revenue and Total Assets by Geographic Area (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 2418410 - Disclosure - Impairment - Schedule of Impairment (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ImpairmentScheduleofImpairmentDetails </Role> |
| | | <ShortName> Impairment - Schedule of Impairment (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 2419411 - Disclosure - Impairment - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ImpairmentNarrativeDetails </Role> |
| | | <ShortName> Impairment - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 2422412 - Disclosure - Income Taxes - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/IncomeTaxesNarrativeDetails </Role> |
| | | <ShortName> Income Taxes - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 2423413 - Disclosure - Income Taxes - Income Tax Expense (Benefit) Reconciliation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/IncomeTaxesIncomeTaxExpenseBenefitReconciliationDetails </Role> |
| | | <ShortName> Income Taxes - Income Tax Expense (Benefit) Reconciliation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 2425414 - Disclosure - Partnerships and Joint Ventures (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/PartnershipsandJointVenturesDetails </Role> |
| | | <ShortName> Partnerships and Joint Ventures (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/PartnershipsandJointVentures </ParentRole> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 2427415 - Disclosure - Guarantees (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/GuaranteesDetails </Role> |
| | | <ShortName> Guarantees (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/Guarantees </ParentRole> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 2429416 - Disclosure - Contingencies and Commitments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ContingenciesandCommitmentsDetails </Role> |
| | | <ShortName> Contingencies and Commitments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/ContingenciesandCommitments </ParentRole> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 2432417 - Disclosure - Contract Assets and Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ContractAssetsandLiabilitiesDetails </Role> |
| | | <ShortName> Contract Assets and Liabilities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/ContractAssetsandLiabilitiesTables </ParentRole> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 2435418 - Disclosure - Remaining Unsatisfied Performance Obligations (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/RemainingUnsatisfiedPerformanceObligationsDetails </Role> |
| | | <ShortName> Remaining Unsatisfied Performance Obligations (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/RemainingUnsatisfiedPerformanceObligationsTables </ParentRole> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 2438419 - Disclosure - Debt and Letters of Credit - Schedule of Debt (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DebtandLettersofCreditScheduleofDebtDetails </Role> |
| | | <ShortName> Debt and Letters of Credit - Schedule of Debt (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 2439420 - Disclosure - Debt and Letters of Credit - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DebtandLettersofCreditNarrativeDetails </Role> |
| | | <ShortName> Debt and Letters of Credit - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 56 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 2441421 - Disclosure - Convertible Preferred Stock (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/ConvertiblePreferredStockDetails </Role> |
| | | <ShortName> Convertible Preferred Stock (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/ConvertiblePreferredStock </ParentRole> |
| | | <Position> 57 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R58.htm </HtmlFileName> |
| | | <LongName> 2444422 - Disclosure - Fair Value Measurements - Recurring Basis (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/FairValueMeasurementsRecurringBasisDetails </Role> |
| | | <ShortName> Fair Value Measurements - Recurring Basis (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 58 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R59.htm </HtmlFileName> |
| | | <LongName> 2445423 - Disclosure - Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/FairValueMeasurementsFinancialInstrumentsNotRequiredtobeMeasuredatFairValueDetails </Role> |
| | | <ShortName> Fair Value Measurements - Financial Instruments Not Required to be Measured at Fair Value (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 59 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 2448424 - Disclosure - Stock-Based Compensation - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/StockBasedCompensationNarrativeDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 60 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R61.htm </HtmlFileName> |
| | | <LongName> 2449425 - Disclosure - Stock-Based Compensation - Schedule of Performance-Based Awards Granted (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/StockBasedCompensationScheduleofPerformanceBasedAwardsGrantedDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Schedule of Performance-Based Awards Granted (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 61 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 2450426 - Disclosure - Stock-Based Compensation - Compensation Expense (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/StockBasedCompensationCompensationExpenseDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Compensation Expense (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 62 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R63.htm </HtmlFileName> |
| | | <LongName> 2453427 - Disclosure - Other Comprehensive Income (Loss) - Tax Effects of Components of Other Comprehensive Income (Loss) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OtherComprehensiveIncomeLossTaxEffectsofComponentsofOtherComprehensiveIncomeLossDetails </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) - Tax Effects of Components of Other Comprehensive Income (Loss) (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OtherComprehensiveIncomeLossTables </ParentRole> |
| | | <Position> 63 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 2454428 - Disclosure - Other Comprehensive Income (Loss) - Changes in AOCI Balances by Component (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OtherComprehensiveIncomeLossChangesinAOCIBalancesbyComponentDetails </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) - Changes in AOCI Balances by Component (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OtherComprehensiveIncomeLossTables </ParentRole> |
| | | <Position> 64 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R65.htm </HtmlFileName> |
| | | <LongName> 2455429 - Disclosure - Other Comprehensive Income (Loss) - Significant Items Reclassified Out of AOCI (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/OtherComprehensiveIncomeLossSignificantItemsReclassifiedOutofAOCIDetails </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) - Significant Items Reclassified Out of AOCI (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.fluor.com/role/OtherComprehensiveIncomeLossTables </ParentRole> |
| | | <Position> 65 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R66.htm </HtmlFileName> |
| | | <LongName> 2458430 - Disclosure - Discontinued Operations - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DiscontinuedOperationsNarrativeDetails </Role> |
| | | <ShortName> Discontinued Operations - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 66 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R67.htm </HtmlFileName> |
| | | <LongName> 2459431 - Disclosure - Discontinued Operations - Financial Information of Discontinued Operations (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DiscontinuedOperationsFinancialInformationofDiscontinuedOperationsDetails </Role> |
| | | <ShortName> Discontinued Operations - Financial Information of Discontinued Operations (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 67 </Position> |
| | | </Report> |
| | <Report instance="flr-20220630.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R68.htm </HtmlFileName> |
| | | <LongName> 2460432 - Disclosure - Discontinued Operations - Cash Flows information Related to Discontinued Operations (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.fluor.com/role/DiscontinuedOperationsCashFlowsinformationRelatedtoDiscontinuedOperationsDetails </Role> |
| | | <ShortName> Discontinued Operations - Cash Flows information Related to Discontinued Operations (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 68 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File doctype="10-Q" original="flr-20220630.htm"> flr-20220630.htm </File> |
| | <File> flr-20220630.xsd </File> |
| | <File> flr-20220630_cal.xml </File> |
| | <File> flr-20220630_def.xml </File> |
| | <File> flr-20220630_lab.xml </File> |
| | <File> flr-20220630_pre.xml </File> |
| | <File> flr2022q2ex311.htm </File> |
| | <File> flr2022q2ex312.htm </File> |
| | <File> flr2022q2ex321.htm </File> |
| | <File> flr2022q2ex322.htm </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="1188"> http://fasb.org/us-gaap/2022 </BaseTaxonomy> |
| | <BaseTaxonomy items="32"> http://xbrl.sec.gov/dei/2022 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |