Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue
Lease revenue	$ 273.5	$ 215.1	$ 158.4
Total revenue	7,824.2	6,700.4	6,403.5
Costs and expenses
Cost of lease revenue	188.5	166.2	128.4
Selling, general and administrative expense	675.9	616.8	644.9
Research and development expense	69.0	67.0	78.4
Restructuring, impairment and other expenses (Note 19)	20.0	15.2	66.7
Total costs and expenses	7,315.0	6,503.1	6,369.6
Other income (expense), net (Note 20)	(248.3)	5.4	46.6
Income from equity affiliates (Note 12)	34.4	44.6	0.6
Income (loss) from Investment in Technip Energies	0.0	(27.7)	322.2
Income before net interest expense and income taxes	295.3	219.6	403.3
Interest income	33.5	17.8	14.0
Interest expense	(122.2)	(138.7)	(157.3)
Loss on early extinguishment of debt	0.0	(29.8)	(61.9)
Income before income taxes	206.6	68.9	198.1
Provision for income taxes (Note 21)	154.7	105.4	111.1
Income (loss) from continuing operations	51.9	(36.5)	87.0
(Income) loss from continuing operations attributable to non-controlling interests	4.3	(25.4)	0.8
Income (loss) from continuing operations attributable to TechnipFMC plc	56.2	(61.9)	87.8
Loss from discontinued operations	0.0	(45.3)	(72.6)
Income from discontinued operations attributable to non-controlling interests	0.0	0.0	(1.9)
Net income (loss) attributable to TechnipFMC plc	$ 56.2	$ (107.2)	$ 13.3
Earnings Per Share [Abstract]
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Basic (usd per share)	$ 0.13	$ (0.14)	$ 0.19
Earnings (loss) per share from continuing operations attributable to TechnipFMC plc Diluted (usd per share)	0.12	(0.14)	0.19
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc Basic (usd per share)	0	(0.10)	(0.17)
Earnings (loss) per share from discontinued operations attributable to TechnipFMC plc Diluted (usd per share)	0	(0.10)	(0.16)
Total earnings (loss) per share attributable to TechnipFMC plc Basic (usd per share)	0.13	(0.24)	0.03
Total earnings (loss) per share attributable to TechnipFMC plc Diluted (usd per share)	$ 0.12	$ (0.24)	$ 0.03
Weighted average shares outstanding (Note 7)
Basic (in shares)	438.6	449.5	450.5
Diluted (in shares)	452.3	449.5	454.6
Service revenue
Revenue
Revenue	$ 4,283.3	$ 3,628.3	$ 3,440.7
Costs and expenses
Cost of product revenue	3,425.3	3,042.2	3,084.7
Product revenue
Revenue
Revenue	3,267.4	2,857.0	2,804.4
Costs and expenses
Cost of product revenue	$ 2,936.3	$ 2,595.7	$ 2,366.5