Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Lease revenue	$ 52.4	$ 38.4	$ 157.5	$ 117.8
Total revenue	1,733.0	1,579.4	5,006.0	4,880.2
Costs and expenses
Cost of lease revenue	36.8	31.2	120.0	94.2
Selling, general and administrative expense	151.9	153.4	454.6	473.6
Research and development expense	19.0	18.7	45.1	54.4
Impairment, restructuring and other expenses	6.9	7.3	15.1	34.8
Total costs and expenses	1,652.2	1,543.4	4,837.8	4,810.5
Other income (expense), net	(10.3)	(5.9)	33.5	28.7
Income (loss) from equity affiliates	13.8	(30.0)	23.5	(9.5)
Income (loss) from investment in Technip Energies	0.0	28.5	(27.7)	351.8
Income before net interest expense and income taxes	84.3	28.6	197.5	440.7
Interest income	4.2	2.1	12.2	8.9
Interest expense	(35.1)	(41.4)	(104.7)	(117.9)
Loss on early extinguishment of debt	0.0	(16.0)	(29.8)	(39.5)
Income (loss) before income taxes	53.4	(26.7)	75.2	292.2
Provision for income taxes	42.7	12.3	91.0	71.7
Income (loss) from continuing operations	10.7	(39.0)	(15.8)	220.5
Net (income) from continuing operations attributable to non-controlling interests	(5.7)	(1.6)	(19.4)	(5.5)
Income (loss) from continuing operations attributable to TechnipFMC plc	5.0	(40.6)	(35.2)	215.0
Income (loss) from discontinued operations	(15.3)	8.4	(34.7)	(44.1)
Income from discontinued operations attributable to non-controlling interests	0.0	0.0	0.0	(1.9)
Net income (loss) attributable to TechnipFMC plc	$ (10.3)	$ (32.2)	$ (69.9)	$ 169.0
Earnings Per Share, Basic and Diluted [Abstract]
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Basic (usd per share)	$ 0.01	$ (0.09)	$ (0.08)	$ 0.48
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Diluted (usd per share)	0.01	(0.09)	(0.08)	0.47
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc basic (usd per share)	(0.03)	0.02	(0.08)	(0.10)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc diluted (usd per share)	(0.03)	0.02	(0.08)	(0.10)
Total earnings (loss) per share attributable to TechnipFMC plc Basic (usd per share)	(0.02)	(0.07)	(0.16)	0.38
Total earnings (loss) per share attributable to TechnipFMC plc Diluted (usd per share)	$ (0.02)	$ (0.07)	$ (0.16)	$ 0.37
Weighted average shares outstanding (Note 6)
Basic (in shares)	450.1	450.7	451.1	450.4
Diluted (in shares)	458.1	450.7	451.1	454.7
Service revenue
Revenue
Revenue	$ 902.0	$ 901.0	$ 2,773.6	$ 2,640.6
Costs and expenses
Cost of product and service revenue	684.1	761.4	2,288.5	2,338.5
Products
Revenue
Revenue	778.6	640.0	2,074.9	2,121.8
Costs and expenses
Cost of product and service revenue	$ 753.5	$ 571.4	$ 1,914.5	$ 1,815.0