Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue
Lease revenue	$ 60.1	$ 46.6	$ 105.1	$ 79.4
Total revenue	1,717.2	1,668.8	3,273.0	3,300.8
Costs and expenses
Cost of lease revenue	43.4	36.8	83.2	63.0
Selling, general and administrative expense	143.1	172.6	302.7	320.2
Research and development expense	11.5	19.2	26.1	35.7
Impairment, restructuring and other expenses	7.2	2.0	8.2	27.5
Total costs and expenses	1,640.2	1,636.3	3,185.6	3,267.1
Other income (expense), net	3.0	(1.0)	43.8	34.6
Income from equity affiliates	4.3	12.8	9.7	20.5
Income (loss) from investment in Technip Energies	0.8	(146.8)	(27.7)	323.3
Income (loss) before net interest expense and income taxes	85.1	(102.5)	113.2	412.1
Interest income	4.0	2.7	8.0	6.8
Interest expense	(31.7)	(37.9)	(69.6)	(76.5)
Loss on early extinguishment of debt	(29.8)	0.0	(29.8)	(23.5)
Income (loss) before income taxes	27.6	(137.7)	21.8	318.9
Provision for income taxes	19.8	34.9	48.3	59.4
Income (loss) from continuing operations	7.8	(172.6)	(26.5)	259.5
Net (income) from continuing operations attributable to non-controlling interests	(5.7)	(2.1)	(13.7)	(3.9)
Income (loss) from continuing operations attributable to TechnipFMC plc	2.1	(174.7)	(40.2)	255.6
Income (loss) from discontinued operations	0.0	7.7	(19.4)	(52.5)
Income from discontinued operations attributable to non-controlling interests	0.0	0.0	0.0	(1.9)
Net income (loss) attributable to TechnipFMC plc	$ 2.1	$ (167.0)	$ (59.6)	$ 201.2
Earnings Per Share, Basic and Diluted [Abstract]
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Basic (usd per share)	$ 0.00	$ (0.39)	$ (0.09)	$ 0.57
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Diluted (usd per share)	0.00	(0.39)	(0.09)	0.56
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc basic (usd per share)	0.00	0.02	(0.04)	(0.12)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc diluted (usd per share)	0.00	0.02	(0.04)	(0.12)
Total earnings (loss) per share attributable to TechnipFMC plc Basic (usd per share)	0.00	(0.37)	(0.13)	0.45
Total earnings (loss) per share attributable to TechnipFMC plc Diluted (usd per share)	$ 0.00	$ (0.37)	$ (0.13)	$ 0.44
Weighted average shares outstanding (Note 6)
Basic (in shares)	452.2	450.6	451.6	450.4
Diluted (in shares)	456.8	450.6	451.6	454.9
Service revenue
Revenue
Revenue	$ 974.9	$ 913.4	$ 1,871.6	$ 1,739.6
Costs and expenses
Cost of product and service revenue	773.3	833.3	1,604.4	1,577.1
Products
Revenue
Revenue	682.2	708.8	1,296.3	1,481.8
Costs and expenses
Cost of product and service revenue	$ 661.7	$ 572.4	$ 1,161.0	$ 1,243.6