Condensed Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to TechnipFMC plc		$ (61.7)	$ 368.2
Net (income) from continuing operations attributable to non-controlling interests		(8.0)	(1.8)
Income from discontinued operations attributable to non-controlling interests		0.0	(1.9)
Net income (loss) attributable to TechnipFMC plc, including non-controlling interests		(53.7)	371.9
Foreign currency translation adjustments
Foreign currency translation adjustments	[1]	125.7	(28.1)
Net gains (losses) on hedging instruments
Net losses arising during the period		(14.9)	(14.5)
Reclassification adjustment for net (gains) losses included in net income (loss)		6.4	(2.7)
Net gains (losses) on hedging instruments	[2]	(8.5)	(17.2)
Pension and other post-retirement benefits
Net gains (losses) arising during the period		(0.2)	3.5
Reclassification adjustment for amortization of prior service cost included in net income (loss)		0.1	0.1
Reclassification adjustment for amortization of net actuarial loss included in net income (loss)		3.0	4.8
Net pension and other postretirement benefits	[3]	2.9	8.4
Other comprehensive income (loss), net of tax		120.1	(36.9)
Comprehensive income		66.4	335.0
Comprehensive income attributable to non-controlling interest		(8.4)	(3.8)
Comprehensive income attributable to TechnipFMC plc		$ 58.0	$ 331.2

[1] Net of income tax benefit of nil for the three months ended March 31, 2022 and 2021.

[2] Net of income tax benefit of $2.1 million and $4.9 million for the three months ended March 31, 2022 and 2021, respectively.

[3] Net of income tax expense of $0.4 million and $2.1 million for the three months ended March 31, 2022 and 2021, respectively.