Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average shares outstanding (Note 5) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Remaining performance obligation, expected timing of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Adjustment to Compensation, Amount Adjustment to Compensation Amount Treasury stock, value, acquired, par value method Treasury Stock, Value, Acquired, Par Value Method Thierry Conti Shares Gift Arrangement [Member] Thierry Conti Shares Gift Arrangement Ordinary shares, $1.00 par value; 618.3 shares authorized in 2026 and 2025; 392.8 shares and 400.7 shares issued and outstanding in 2026 and 2025, respectively Common Stock, Value, Issued Payments related to taxes withheld on share-based compensation Payment, Tax Withholding, Share-Based Payment Arrangement Foreign exchange gain (loss), net Realized Gain (Loss), Foreign Currency Transaction, before Tax Schedule of Long-Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] OTHER MATTERS Retirement Benefits [Text Block] Maximum potential undiscounted payments Guarantor Obligations, Maximum Exposure, Undiscounted Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Supply Commitment [Axis] Supply Commitment [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Net contract liabilities Contract Assets (Liabilities), Current, Net Contract Assets (Liabilities), Current, Net Advances paid to suppliers Advances Paid To Suppliers Advances Paid To Suppliers Amendment Flag Amendment Flag Current period provision (release) for expected credit losses Accounts Receivable, Credit Loss Expense (Reversal) Schedule of Net Notional Amount Bought (Sold) Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Favorable (unfavorable) impacts of cost estimate revisions Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Estimate of Transaction Price External Credit Rating, Moody's [Domain] External Credit Rating, Moody's [Domain] Finance lease right-of-use assets Finance Lease, Right-of-Use Asset, before Accumulated Amortization Schedule of Gain (Loss) Recognized in Income Related to Hedges and Derivatives Location of gain (loss) recognized in income related to hedges and derivatives [Table Text Block] Location of gain (loss) recognized in income related to hedges and derivatives [Table Text Block] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province PEO Total Compensation Amount PEO Total Compensation Amount Ordinary shares, par value (usd per share) Common Stock, Par or Stated Value Per Share Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Assets Assets, Fair Value Disclosure [Abstract] Amount Reclassified out of Accumulated Other Comprehensive Income (loss) Amount Reclassified out of Accumulated Other Comprehensive Income (loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Capital Expenditures Segment Reporting, Long-Lived Asset, Expenditure for Addition Intangible assets, net of accumulated amortization of $847.0 in 2026 and $806.8 in 2025 Intangible Asset, Excluding Goodwill, after Accumulated Amortization Derivative, notional amount Derivative, Notional Amount Basic (in shares) Weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Contract assets Contract assets Contract with Customer, Asset, after Allowance for Credit Loss, Current Retirement Benefits [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Dofcon Dofcon Navegacao [Member] Dofcon Navegacao [Member] Favorable (unfavorable) impacts of net revenue recognized Contract with Customer, Performance Obligation Satisfied in Previous Period Work in process Inventory, Work in Process, Net of Reserves Derivative financial instruments (Note 11) Derivative Liability, Current Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Cash flow hedge loss expected to be reclassified within 12 months Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months Entity Address, City or Town Entity Address, City or Town Share-based Compensation Arrangement by Share-based Payment Award Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Defined Benefit Plan Disclosure Defined Benefit Plan Disclosure [Line Items] RECEIVABLES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Foreign Plan Foreign Plan [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Earned (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of presentation Basis of Accounting, Policy [Policy Text Block] Product revenue Products Product [Member] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Debt issuance costs Debt Issuance Costs, Gross Trade receivables, net of allowances of $42.2 in 2026 and $45.3 in 2025 Accounts and Other Receivables, Net, Current Level 2 Fair Value, Inputs, Level 2 [Member] Intangible assets, accumulated amortization Intangible Asset, Finite-Lived, Accumulated Amortization Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Other comprehensive income (loss), net of tax Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Schedule of Segment Assets Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Short-term debt and current portion of long-term debt (Note 10) Less: Short-term debt and current portion of long-term debt Long-Term Debt, Current Maturities Subsequent Event Type [Axis] Subsequent Event Type [Axis] Net gains (losses) on hedging instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Recently Issued Accounting Standards under GAAP New Accounting Pronouncements, Policy [Policy Text Block] Contract liabilities Increase (Decrease) in Contract with Customer, Liability Schedule of Segment Reporting Information Segment Reporting [Table Text Block] Non-controlling Interest Noncontrolling Interest [Member] Related Party [Axis] Related and Nonrelated Parties [Axis] Private Placement Notes Unsecured Debt [Member] Net pension and other post-retirement benefits, tax benefit (expense) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Total debt Long-Term Debt Legal provisions Estimated Litigation Liability, Current Guarantor Obligations Guarantor Obligations [Line Items] Document Period End Date Document Period End Date Changes in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Cash required by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends payable (usd per share) Dividends Payable, Amount Per Share Debt instrument face amount Debt Instrument, Face Amount STOCKHOLDERS’ EQUITY Equity [Text Block] Costs and expenses Costs and Expenses [Abstract] Security Exchange Name Security Exchange Name Debt instrument, term Debt Instrument, Term Schedule of Other Business Segment Information Segment Reporting, Reconciliation of Other Item by Segment to Consolidated [Table Text Block] Position [Axis] Position [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Loans receivables Financing Receivable, before Allowance for Credit Loss SUPPLIER FINANCE PROGRAM OBLIGATIONS Supplier Finance Program [Text Block] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Increase in ROIC (as a percent) Share-Based Compensation Arrangement By Share-Based Payment Award, Return On Investment Capital, Percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Return On Investment Capital, Percentage Number of shares authorized (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Operating lease liabilities Operating Lease, Liability, Current Statement of Comprehensive Income [Abstract] EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Earnings per share attributable to TechnipFMC plc Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Financial guarantees Financial Guarantee [Member] Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Capital expenditures Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Income taxes payable Accrued Income Taxes, Current Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Company Selected Measure Name Company Selected Measure Name Singapore dollar Singapore, Dollars Amounts reclassified from accumulated OCI to income (loss) Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Other Current Assets and Other Current Liabilities [Abstract] Other Current Assets and Other Current Liabilities [Abstract] Other Current Assets and Other Current Liabilities [Abstract] Favorable (unfavorable) impacts of changes in contract estimates Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Modification of Contract Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Total Total gain (loss) recognized in income associated with hedges and derivatives Total gain (loss) recognized in income associated with hedges and derivatives Defined Pension  and Other Post-Retirement Benefits Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Long-term debt, gross Long-Term Debt, Gross Credit Facility [Domain] Credit Facility [Domain] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Total shares and dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Schedule of Other Current Assets Schedule of Other Current Assets [Table Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial Paper Commercial Paper [Member] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Money market and stable value fund Cash Equivalent, Money Market Fund, Carrying Value Schedule of Share-based Compensation Arrangements by Share-based Payment Award Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Guarantor obligations, current carrying value Guarantor Obligations, Current Carrying Value Liabilities Gross Amount Recognized Derivative Liability, Subject to Master Netting Arrangement, before Offset Line of credit facility borrowing capacity Line of Credit Facility, Current Borrowing Capacity Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Dividends declared Dividends Receivable Foreign currency translation adjustments, net of income tax OCI, Foreign Currency Transaction and Translation Gain (Loss), Arising During Period, Tax Award Timing Predetermined Award Timing Predetermined [Flag] Letters of credit outstanding amount Letters of Credit Outstanding, Amount Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1 Fair Value, Inputs, Level 1 [Member] Derivative financial instruments (Note 11) Derivative Asset, Noncurrent Effective tax rate (percent) Effective Income Tax Rate Reconciliation, Percent Dilutive effect of awards granted under our stock incentive plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements All Executive Categories All Executive Categories [Member] Shares repurchased and cancelled Stock Repurchased and Retired During Period, Value Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Net gains (losses) arising during the period Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Derivative financial instruments – Embedded Derivatives Embedded Derivative Financial Instruments [Member] Plan Name [Domain] Plan Name [Domain] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Pension and other post-retirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Term Benchmark loans Term Benchmark Loans [Member] Term Benchmark Loans Guarantor Obligations, Nature Guarantor Obligations, Nature [Axis] Schedule of Reconciliation of the Number of Shares Used for the Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] BUSINESS SEGMENTS Segment Reporting [Text Block] Dividends paid Payments of Ordinary Dividends, Common Stock Expiration Date Trading Arrangement Expiration Date Hedging Relationship Hedging Relationship [Axis] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Income Statement Location [Axis] Location, Statement of Income, Balance [Axis] Gross Amounts Not Offset, Permitted Under Master Netting Agreements Derivative Asset, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equity Beginning balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Total liabilities Financial Liabilities Fair Value Disclosure Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Ordinary shares, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Brazilian real Brazil, Brazil Real Exercise Price Award Exercise Price Cash required by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Schedule of Equity Method Investments Schedule of Equity Method Investments [Line Items] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Segment Reporting Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Derivative assets Derivative Asset [Abstract] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Income taxes (receivable) payable, net Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Effect of changes in foreign exchange rates on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation DEBT Debt Disclosure [Text Block] Unamortized debt issuance costs and discounts Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Derivative liabilities Derivative Liability [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Investments in equity affiliates (Note 9) Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Foreign exchange contracts Foreign exchange contracts Foreign Exchange Contract [Member] Performance guarantees Performance Guarantee [Member] Total costs and expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Euro Euro Member Countries, Euro Counterparty Name [Domain] Counterparty Name [Domain] Interest rate, stated percentage (percent) Debt Instrument, Interest Rate, Stated Percentage Dividends declared and paid Dividends, Common Stock, Cash Total TechnipFMC plc stockholders’ equity Accumulated other comprehensive losses on forecasted transactions Equity, Attributable to Parent OTHER CURRENT ASSETS & OTHER CURRENT LIABILITIES Other Current Assets [Text Block] Equity securities Equity Securities, FV-NI, Current Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Schedule of Financing Receivable Credit Quality Indicators Financing Receivable Credit Quality Indicators [Table Text Block] Insider Trading Policies and Procedures [Line Items] Other financing activities Proceeds from (Payment for) Other Financing Activity Trade receivables, allowances Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Deferred income tax provision, net Deferred Income Tax Expense (Benefit) Selling, general and administrative expense Selling, General and Administrative Expense Net interest expense Interest Income (Expense), Nonoperating Restructuring, impairment and other expenses Restructuring, Settlement and Impairment Provisions Letter of Credit Letter of Credit [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Compensation accrual Deferred Compensation Liability, Current Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Entity Central Index Key Entity Central Index Key Property, plant and equipment, accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Capital in excess of par value of ordinary shares Additional Paid in Capital, Common Stock All Adjustments to Compensation All Adjustments to Compensation [Member] Corporate items Corporate Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Other operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Schedule of Guarantor Obligations [Table] Guarantor Obligation [Table] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Remaining performance obligation (percent) Revenue, Remaining Performance Obligation, Percentage Other Stockholders' Equity, Other Other comprehensive income (loss) before reclassifications, net of tax Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Income Statement [Abstract] Income Statement [Abstract] Document Transition Report Document Transition Report Inventory, Finished Goods and Work in Process, Gross [Abstract] Inventory, Finished Goods and Work in Process, Gross [Abstract] Accumulated Other Comprehensive Loss Attributable to Non-Controlling Interest AOCI Attributable to Noncontrolling Interest [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Deferred income taxes Deferred Income Tax Assets, Net Finance lease liabilities, less current portion Finance Lease, Liability, Noncurrent Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Corporate expense Segment Reporting, Corporate Expense Segment Reporting, Corporate Expense U.S. dollar United States of America, Dollars Debt instrument, basis spread on variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Moody’s rating Aa3 - Ba1 Moodys Aa3 - Ba1 Rating [Member] Moodys Aa3 - Ba1 Rating City Area Code City Area Code Variable Rate [Domain] Variable Rate [Domain] Amortization of prior service credit (cost) Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] Accumulated Other Comprehensive Loss Accumulated Other Comprehensive  Loss Attributable to TechnipFMC plc AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] SUBSEQUENT EVENTS Subsequent Events [Text Block] Debt, fair value Debt Instrument, Fair Value Disclosure Dividends paid Payments of Dividends Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Dofcon Brasil AS Dofcon Brasil AS [Member] Dofcon Brasil AS [Member] Number of counterparties Debt Instrument, Number Of Counterparties Debt Instrument, Number Of Counterparties Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Schedule of Defined Benefit Plans Disclosures Defined Benefit Plan [Table] Entity [Domain] Entity [Domain] Reclassification adjustment for amortization of net actuarial losses included in net income Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Net (income) loss attributable to non-controlling interests Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Loans receivables and other Financing Receivable, Year One To Four, Originated, Current To Four Years Before Current Fiscal Year Financing Receivable, Year One To Four, Originated, Current To Four Years Before Current Fiscal Year New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Standards Update and Change in Accounting Principle [Abstract] Employee benefit plan and share-based compensation costs Employee Benefits and Share-Based Compensation Operating Segments Operating Segments [Member] Interest expense Interest Expense, Nonoperating SHARE-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Number of plans that entered into buy-in contracts Defined Benefit Plan, Buy-In Contracts, Number Of Plans Defined Benefit Plan, Buy-In Contracts, Number Of Plans PEO PEO [Member] Value-added tax and other taxes payable Accrual for Taxes Other than Income Taxes, Current Other liabilities Other Liabilities, Noncurrent Retirement Plan Type Retirement Plan Type [Axis] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Gross Amounts Not Offset, Permitted Under Master Netting Agreements Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Subsequent Event Type [Domain] Subsequent Event Type [Domain] Payables and Accruals [Abstract] Accumulated Deficit Retained Earnings [Member] Operating lease liabilities, less current portion Operating Lease, Liability, Noncurrent DOF DOF Subsea [Member] DOF Subsea Revolving Credit Facility Revolving Credit Facility [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Amortization of net actuarial loss Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Ordinary shares, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted (usd per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Cash required by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Liabilities Liabilities, Fair Value Disclosure [Abstract] Cash Flow Hedging Cash Flow Hedging [Member] Value-added tax receivables Value Added Tax Receivable, Current Country Region Country Region Line of Credit Facility Line of Credit Facility [Line Items] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Value Creation Plan Value Creation Plan [Member] Value Creation Plan 4.00% 2012 Private Placement Notes due 2032 Notes Due 2032 4.00% [Member] Notes Due 2032 4.00% Techdof Brasil AS Techdof Brasil AS [Member] Techdof Brasil AS Research and development expense Research and Development Expense Research and Development Expense Adjustments to reconcile net income to cash provided by operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Schedule of Derivative Assets, Gross and Net Offsetting Assets [Table Text Block] COMMITMENTS AND CONTINGENT LIABILITIES Commitments Contingencies and Guarantees [Text Block] Stock repurchase program, increase in authorized amount Stock Repurchase Program, Increase In Authorized Amount Stock Repurchase Program, Increase In Authorized Amount Share-Based Payment Arrangement [Abstract] Thierry Conti [Member] Thierry Conti Cash required by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant and equipment, net of accumulated depreciation of $3,548.1 in 2026 and $3,543.3 in 2025 Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Supply Commitment [Line Items] Supply Commitment [Line Items] Volume-weighted average period Share-Based Compensation Arrangement by Share-Based Payment Award, Volume-Weighted Average Share Price, Period Share-Based Compensation Arrangement by Share-Based Payment Award, Volume-Weighted Average Share Price, Period British pound United Kingdom, Pounds Net Amount Derivative Asset INVENTORIES Inventory Disclosure [Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Comprehensive (income) loss attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Thierry Conti Shares Sale Arrangement [Member] Thierry Conti Shares Sale Arrangement REVENUE Revenue from Contract with Customer [Text Block] Issuance of ordinary shares, net of shares withheld for tax Stock Issued During Period, Value, New Issues Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Prepaid expenses Prepaid Expense, Current Schedule of Location of Gains Related to Derivative Instruments Designated as Cash Flow Hedges Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] Other investing activities Payment for (Proceeds from) Other Investing Activity Inventories, net Increase (Decrease) in Inventories Provisions for operational commitments Provisions For Restructuring, Insurance Claims, And Other Provisions for Restructuring, Insurance, and Other Warranty accruals and project contingencies Product Warranty Accrual, Current Segment Reporting Segment Reporting [Table] Location of gain (loss) recognized in income related to hedges and derivatives [Line Items] Location of gain (loss) recognized in income related to hedges and derivatives [Line Items] Location of gain (loss) recognized in income related to hedges and derivatives [Line Items] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Location of gain (loss) recognized in income related to hedges and derivatives [Table] Location of gain (loss) recognized in income related to hedges and derivatives [Table] Location of gain (loss) recognized in income related to hedges and derivatives [Table] Other current assets (Note 8) Total other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total segment operating profit Operating Income (Loss) Net gains (losses) on hedging instruments, tax expense (benefit) Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax Service revenue Services Service [Member] Aggregate transaction price allocated to order backlog Total remaining unsatisfied performance obligations Revenue, Remaining Performance Obligation, Amount Asia Pacific Asia Pacific [Member] Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Derivative [Line Items] Derivative [Line Items] Net gains (losses) on hedging instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract] Total corporate items Segment Reporting Corporate Other Revenue And Expense Includes (1) corporate expenses, (2) other revenue and other expense, net, and 3) net interest expense. Australian dollar Australia, Dollars Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Common stock, dividends (usd per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Indonesian rupiah Indonesia, Rupiahs Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Schedule of Financing Receivable, Allowance for Credit Loss Financing Receivable, Allowance for Credit Loss [Table Text Block] Ordinary shares, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] INVESTMENTS Equity Method Investments and Joint Ventures Disclosure [Text Block] Schedule of Guarantor Obligations Schedule of Guarantor Obligations [Table Text Block] Income from equity affiliates, net of dividends received Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Amounts excluded from effectiveness testing Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net Norwegian krone Norway, Krone Equity Components [Axis] Equity Components [Axis] Related Party Related Party [Member] Currency [Axis] Currency [Axis] Product and Service [Domain] Product and Service [Domain] Number of tranches Debt Instrument, Number of Tranches Debt Instrument, Number of Tranches Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Finance lease liabilities Finance Lease, Liability, Current Deferred income taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Gain (loss) recognized in income on derivatives not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Entity Small Business Entity Small Business Reclassification out of Accumulated Other Comprehensive Income Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Comprehensive income attributable to TechnipFMC plc Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Total cash flow hedge gain (loss) recognized in income Total Cash Flow Hedge Gain (Loss) Recognized In Income Total Cash Flow Hedge Gain (Loss) Recognized In Income Stock repurchase program, remaining shares authorized to be repurchased (in shares) Share Repurchase Program, Remaining Authorized, Number of Shares Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net pension and other post-retirement benefits Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities (Note 8) Total other current liabilities Other Liabilities, Current Other assets Other Assets, Noncurrent Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Derivative financial instruments (Note 11) Derivative Asset, Current Credit Rating, Moody's [Axis] Credit Rating, Moody's [Axis] Surface Technologies Surface Technologies [Member] Surface technologies [Member] Fair Value as of Grant Date Award Grant Date Fair Value Notional Amount Sold Short [Member] Supply Commitment Arrangement [Domain] Supply Commitment Arrangement [Domain] Other Other Assets, Miscellaneous, Current Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Stock repurchase program, remaining authorized repurchase amount Share Repurchase Program, Remaining Authorized, Amount Net unrealized gains (losses) arising during the period Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingent liabilities (Note 17) Commitments and Contingencies Total revenue Revenue Revenues Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Income from equity affiliates (Note 9) Income from equity affiliates Income (Loss) from Equity Method Investments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Supplier Finance Program Structured Finance [Member] Executive Category: Executive Category [Axis] Supply Commitment [Table] Supply Commitment [Table] Counterparty Name [Axis] Counterparty Name [Axis] Liabilities and equity Liabilities and Equity [Abstract] Guarantor obligations, term of obligation Guarantor Obligation Expiration Term Guarantor Obligation Expiration Term Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Amounts due suppliers of supply chain finance program Supplier Finance Program, Obligation Inventories, net (Note 7) Inventories, net Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Reclassification adjustment for net (gains) losses included in net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Income before net interest expense and income taxes Income (Loss) from Continuing Operations before Interest Expense, Interest Income, Income Taxes, Noncontrolling Interests, Net Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Five-Year Senior Secured Performance Letters of Credit Five-Year Senior Secured Performance Letters Of Credit [Member] Five-Year Senior Secured Performance Letters Of Credit PEO Name PEO Name Geographical [Axis] Geographical [Axis] Share repurchases Payments for Repurchase of Equity Hedging Gains (losses) on hedging instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Other segment items Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Net gains arising during the period Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Volume-weighted average share price (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Volume-Weighted Average Share Price Share-Based Compensation Arrangement by Share-Based Payment Award, Volume-Weighted Average Share Price Accounts payable, trade Increase (Decrease) in Accounts Payable Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Base Rate Base Rate [Member] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Subsea Subsea [Member] Subsea [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Malaysian ringgit Malaysia, Ringgits Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Equity method investment, ownership (percent) Equity Method Investment, Ownership Percentage Notional Amount Bought Long [Member] Investment, Name [Domain] Investment, Name [Domain] Schedule of Components of Inventories Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Schedule of Fair Value of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Basic (usd per share) Earnings Per Share, Basic Contract liabilities Contract liabilities Contract with Customer, Liability, Current Total current assets Assets, Current Insider Trading Arrangements [Line Items] Accrued payroll Accrued Payroll Taxes, Current Long-term debt, less current portion (Note 10) Long-term debt Long-Term Debt, Excluding Current Maturities Cost of sales Cost of sales Cost of Revenue Award Type [Axis] Award Type [Axis] Foreign exchange contracts Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Commercial Paper Dealer Agreements Commercial Paper Dealer Agreements [Member] Commercial Paper Dealer Agreements Accumulated deficit Retained Earnings (Accumulated Deficit) Segment Reporting, Measurement Disclosures [Abstract] Segment Reporting, Measurement Disclosures [Abstract] Product and Service [Axis] Product and Service [Axis] All Currencies [Domain] All Currencies [Domain] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Pension Plan Pension Plan [Member] Ordinary Shares Common Stock [Member] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Middle East Middle East [Member] Derivative Contract [Domain] Derivative Contract [Domain] Derivative Contract [Domain] Proceeds from exercise of stock options APIC, Share-Based Payment Arrangement, Recognition and Exercise Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Hedging Relationship Hedging Relationship [Domain] Total liabilities and equity Liabilities and Equity Derivative financial instruments (Note 11) Derivative Liability, Noncurrent Employee Stock Option Share-Based Payment Arrangement, Option [Member] Non-controlling interests Equity, Attributable to Noncontrolling Interest Segments Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related Party [Domain] Related and Nonrelated Parties [Domain] Plan Name [Axis] Plan Name [Axis] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent [Abstract] Tabular List, Table Tabular List [Table Text Block] Reclassification adjustment for amortization of prior service cost included in net income Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax Bank borrowings and other Notes Payable to Banks [Member] Other income (expense), net Other income (expense), net Other Nonoperating Income (Expense) Income taxes receivable Income Taxes Receivable, Current Name Awards Close in Time to MNPI Disclosures, Individual Name Stockholders’ equity (Note 14) Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Entity Address, Country Entity Address, Country Africa Africa [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Other Current Liabilities Other Current Liabilities [Table Text Block] Derivatives, Fair Value Derivatives, Fair Value [Line Items] Adjustment to Compensation: Adjustment to Compensation [Axis] Reclassification adjustment for net (gains) losses included in net income, net of tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Hedging Designation [Domain] Hedging Designation [Domain] Europe and Central Asia Europe And Central Asia [Member] Europe And Central Asia Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Foreign Exchange Forward Foreign Exchange Forward [Member] 3.75% 2013 Private Placement Notes due 2033 Notes due 2033 3.75% [Member] Notes due 2033 3.75% Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total assets Assets, Fair Value Disclosure Maximum available commitments under accordion feature Line Of Credit, Accordion Feature, Maximum Borrowing Capacity Line Of Credit, Accordion Feature, Maximum Borrowing Capacity Canadian dollar Canada, Dollars Name Measure Name Consideration payable Accrued Consideration Payable, Non-Trade Liabilities, Current Accrued Consideration Payable, Non-Trade Liabilities, Current INCOME TAXES Income Tax Disclosure [Text Block] Accounts payable, trade Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 4.00% 2012 Private Placement Notes due 2027 Notes Due 2027 4.00% [Member] Notes Due 2027 4.00% Debt Instrument Debt Instrument [Line Items] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Indirect guarantee of indebtedness Indirect Guarantee of Indebtedness [Member] Retirement Plan Type Retirement Plan Type [Domain] Performance Share Units Performance Share Units [Member] Performance Share Units [Member] Capital in Excess of Par Value of Ordinary Shares Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Guarantor Obligations, Nature Guarantor Obligations, Nature [Domain] Repayment of debt obligations Repayments of Short-Term Debt Schedule of Derivative Liabilities, Gross and Net Offsetting Liabilities [Table Text Block] Name Trading Arrangement, Individual Name Withholding tax and other receivables Withholding Tax and Other Receivables Withholding Tax and Other Receivables Cash and cash equivalents Cash and Cash Equivalent Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Position [Domain] Position [Domain] Raw materials Inventory, Raw Materials, Net of Reserves Company Selected Measure Amount Company Selected Measure Amount Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation and amortization Depreciation and Amortization Depreciation, Depletion and Amortization Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Indian rupee India, Rupees Net income Net income attributable to TechnipFMC plc, including non-controlling interests Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net Amount Derivative Liability Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One North America North America [Member] Provision for income taxes (Note 13) Provision for income taxes Provision (benefit) for income taxes Income Tax Expense (Benefit) Latin America Latin America [Member] Cost of product and service revenue Cost of Product and Service Sold Award Timing Method Award Timing Method [Text Block] Change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Favorable updates across the project portfolio Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress NEW ACCOUNTING STANDARDS Accounting Standards Update and Change in Accounting Principle [Text Block] Net income attributable to TechnipFMC plc Net income attributable to TechnipFMC plc Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Social security and payroll taxes Social Security Liability And Payroll Taxes Current Social security liability, current Schedule of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Remaining Revenue Performance Obligations Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Interest income Investment Income, Interest Schedule of Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Trade receivables, net and Contract assets Increase (Decrease) in Receivables Assets Gross Amount Recognized Derivative Asset, Subject to Master Netting Arrangement, before Offset Other current assets and liabilities, net Increase (Decrease) in Other Current Assets and Liabilities, Net Revenue Revenues [Abstract] Recoveries Accounts Receivable, Allowance for Credit Loss, Recovery BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]