CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue
Lease revenue	$ 54.2	$ 45.0
Total revenue	1,717.4	1,555.8
Costs and expenses
Cost of lease revenue	39.8	39.8
Selling, general and administrative expense	153.9	159.6
Research and development expense	15.4	14.6
Impairment, restructuring and other expenses	0.6	1.0
Total costs and expenses	1,666.4	1,545.4
Other income (expense), net	(1.3)	40.8
Income from equity affiliates (Note 9)	14.2	5.4
Loss from investment in Technip Energies (Note 9)	0.0	(28.5)
Income before net interest expense and income taxes	63.9	28.1
Interest income	8.3	4.0
Interest expense	(27.0)	(37.9)
Income (loss) before income taxes	45.2	(5.8)
Provision for income taxes (Note 14)	37.4	28.5
Income (loss) from continuing operations	7.8	(34.3)
Net (income) from continuing operations attributable to non-controlling interests	(7.4)	(8.0)
Income (loss) from continuing operations attributable to TechnipFMC plc	0.4	(42.3)
Loss from discontinued operations	0.0	(19.4)
Net income (loss) attributable to TechnipFMC plc	$ 0.4	$ (61.7)
Earnings Per Share, Basic and Diluted [Abstract]
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Basic (usd per share)	$ 0.00	$ (0.09)
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Diluted (usd per share)	0.00	(0.09)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc basic (usd per share)	0.00	(0.04)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc diluted (usd per share)	0.00	(0.04)
Total earnings (loss) per share attributable to TechnipFMC plc Basic (usd per share)	0.00	(0.13)
Total earnings (loss) per share attributable to TechnipFMC plc Diluted (usd per share)	$ 0.00	$ (0.13)
Weighted average shares outstanding (Note 5)
Basic (in shares)	442.1	451.1
Diluted (in shares)	455.0	451.1
Service revenue
Revenue
Revenue	$ 868.1	$ 896.7
Costs and expenses
Cost of product and service revenue	802.0	831.1
Products
Revenue
Revenue	795.1	614.1
Costs and expenses
Cost of product and service revenue	$ 654.7	$ 499.3