Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue
Lease revenue	$ 158.4	$ 142.0	$ 266.5
Total revenue	6,403.5	6,530.6	6,950.2
Costs and expenses
Cost of lease revenue	128.4	116.7	167.9
Selling, general and administrative expense	644.9	724.1	795.7
Research and development expense	78.4	75.3	149.5
Impairment, restructuring and other expense	66.7	3,402.0	2,456.7
Merger transaction and integration costs	0.0	0.0	14.2
Total costs and expenses	6,369.6	10,037.2	9,308.2
Other income (expense), net	46.6	25.1	(181.6)
Income from equity affiliates (Note 13)	0.6	64.6	59.8
Income from Investment in Technip Energies	322.2	0.0	0.0
Income (loss) before net interest expense and income taxes	403.3	(3,416.9)	(2,479.8)
Interest income	14.0	52.3	43.6
Interest expense	(157.3)	(134.1)	(134.9)
Loss on early extinguishment of debt	(61.9)	0.0	0.0
Income (loss) before income taxes	198.1	(3,498.7)	(2,571.1)
Provision for income taxes (Note 22)	111.1	19.4	79.0
Income (loss) from continuing operations	87.0	(3,518.1)	(2,650.1)
(Income) loss from continuing operations attributable to non-controlling interests	0.8	(34.5)	4.6
Income (loss) from continuing operations attributable to TechnipFMC plc	87.8	(3,552.6)	(2,645.5)
Income (loss) from discontinued operations	(72.6)	280.2	238.0
Income from discontinued operations attributable to non-controlling interests	(1.9)	(15.2)	(7.7)
Net income (loss) attributable to TechnipFMC plc	$ 13.3	$ (3,287.6)	$ (2,415.2)
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc
Earnings (loss) per share from continuing operations basic (usd per share)	$ 0.19	$ (7.92)	$ (5.91)
Earnings (loss) per share from continued operations diluted (usd per share)	0.19	(7.92)	(5.91)
Earnings (loss) per share from discontinued operations basic (usd per share)	(0.17)	0.59	0.51
Earnings (loss) per share from discontinued operations diluted (usd per share)	(0.16)	0.59	0.51
Earnings (loss) per share from continuing operations basic (usd per share)	0.03	(7.33)	(5.39)
Earnings (loss) per share from continuing operations diluted (usd per share)	$ 0.03	$ (7.33)	$ (5.39)
Weighted average shares outstanding (Note 8)
Basic (in shares)	450.5	448.7	448.0
Diluted (in shares)	454.6	448.7	448.0
Service revenue
Revenue
Revenue	$ 3,440.7	$ 3,266.8	$ 3,412.0
Costs and expenses
Cost of product revenue	3,084.7	2,946.9	2,769.5
Product revenue
Revenue
Revenue	2,804.4	3,121.8	3,271.7
Costs and expenses
Cost of product revenue	$ 2,366.5	$ 2,772.2	$ 2,954.7