CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue
Lease revenue	$ 64.0	$ 60.1	$ 118.2	$ 105.1
Total revenue	1,972.2	1,717.2	3,689.6	3,273.0
Costs and expenses
Cost of lease revenue	45.7	43.4	85.5	83.2
Selling, general and administrative expense	150.0	143.1	303.9	302.7
Research and development expense	16.8	11.5	32.2	26.1
Impairment, restructuring and other expenses	5.1	7.2	5.7	8.2
Total costs and expenses	1,813.7	1,640.2	3,480.1	3,185.6
Other income (expense), net (Note 13)	(182.3)	3.0	(183.6)	43.8
Income from equity affiliates (Note 9)	1.1	4.3	15.3	9.7
Income (loss) from investment in Technip Energies	0.0	0.8	0.0	(27.7)
Income (loss) before net interest expense and income taxes	(22.7)	85.1	41.2	113.2
Interest income	4.1	4.0	12.4	8.0
Interest expense	(34.4)	(31.7)	(61.4)	(69.6)
Loss on early extinguishment of debt	0.0	(29.8)	0.0	(29.8)
Income (loss) before income taxes	(53.0)	27.6	(7.8)	21.8
Provision for income taxes (Note 14)	43.3	19.8	80.7	48.3
Income (loss) from continuing operations	(96.3)	7.8	(88.5)	(26.5)
(Income) loss from continuing operations attributable to non-controlling interests	9.1	(5.7)	1.7	(13.7)
Income (loss) from continuing operations attributable to TechnipFMC plc	(87.2)	2.1	(86.8)	(40.2)
Loss from discontinued operations	0.0	0.0	0.0	(19.4)
Net income (loss) attributable to TechnipFMC plc	$ (87.2)	$ 2.1	$ (86.8)	$ (59.6)
Earnings Per Share, Basic and Diluted [Abstract]
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Basic (usd per share)	$ (0.20)	$ 0.00	$ (0.20)	$ (0.09)
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Diluted (usd per share)	(0.20)	0.00	(0.20)	(0.09)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc basic (usd per share)	0.00	0.00	0.00	(0.04)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc diluted (usd per share)	0.00	0.00	0.00	(0.04)
Total earnings (loss) per share attributable to TechnipFMC plc Basic (usd per share)	(0.20)	0.00	(0.20)	(0.13)
Total earnings (loss) per share attributable to TechnipFMC plc Diluted (usd per share)	$ (0.20)	$ 0.00	$ (0.20)	$ (0.13)
Weighted average shares outstanding (Note 5)
Basic (in shares)	440.1	452.2	441.1	451.6
Diluted (in shares)	440.1	456.8	441.1	451.6
Service revenue
Revenue
Revenue	$ 1,049.4	$ 974.9	$ 1,917.5	$ 1,871.6
Costs and expenses
Cost of product and service revenue	870.5	773.3	1,672.5	1,604.4
Products
Revenue
Revenue	858.8	682.2	1,653.9	1,296.3
Costs and expenses
Cost of product and service revenue	$ 725.6	$ 661.7	$ 1,380.3	$ 1,161.0