CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022		Sep. 30, 2023		Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to TechnipFMC plc		$ 90.0	$ (10.3)		$ 3.2		$ (69.9)
(Income) from continuing operations attributable to non-controlling interests		(3.7)	(5.7)		(2.0)		(19.4)
Net income (loss) attributable to TechnipFMC plc, including non-controlling interests		93.7	(4.6)		5.2		(50.5)
Foreign currency translation adjustments
Foreign currency translation adjustments		(50.5)	(100.0)	[1]	(0.6)	[1]	(104.3)	[1]
Net gains (losses) on hedging instruments
Net gains (losses) arising during the period		5.6	(33.4)		(19.3)		(92.0)
Reclassification adjustment for net (gains) losses included in net income (loss)		(12.4)	6.7		(3.8)		18.5
Net losses on hedging instruments	[2]	(6.8)	(26.7)		(23.1)		(73.5)
Pension and other post-retirement benefits
Net gains (losses) arising during the period		0.5	(1.5)		0.7		(3.0)
Reclassification adjustment for amortization of prior service cost included in net income (loss)		0.1	0.1		0.2		0.3
Reclassification adjustment for amortization of net actuarial loss included in net income (loss)		2.2	2.9		6.6		8.9
Net pension and other post-retirement benefits	[3]	2.8	1.5		7.5		6.2
Other comprehensive loss, net of tax		(54.5)	(125.2)		(16.2)		(171.6)
Comprehensive income (loss)		39.2	(129.8)		(11.0)		(222.1)
Comprehensive (income) attributable to non-controlling interest		(10.7)	(2.9)		(5.8)		(12.2)
Comprehensive income (loss) attributable to TechnipFMC plc		$ 28.5	$ (132.7)		$ (16.8)		$ (234.3)

[1] Net of income tax of nil for the three and nine months ended September 30, 2023 and 2022.

[2] Net of income tax benefit of $11.4 million and $8.1 million for the three months ended September 30, 2023 and 2022, respectively, and $0.4 million and $8.2 million for the nine months ended September 30, 2023 and 2022, respectively.

[3] Net of income tax (expense) benefit of $(0.5) million and $(2.9) million for the three months ended September 30, 2023 and 2022, respectively, and $1.5 million and $(6.0) million for the nine months ended September 30, 2023 and 2022, respectively.