Consolidated Statements of Changes in Stockholders Equity € in Millions, $ in Millions	USD ($)	EUR (€)	Ordinary Shares Issued USD ($)	Ordinary Shares Held In Treasury And Employee Benefit Trust [Member] USD ($)	Capital in Excess of Par Value of Ordinary Shares USD ($)	Retained Earnings USD ($)	Accumulated Other Comprehensive Income (Loss) USD ($)	Noncontrolling Interest USD ($)
Beginning balance at Dec. 31, 2015	$ 4,956.4		$ 114.5	$ (81.1)	$ 2,725.4	$ 3,273.4	$ (1,085.0)	$ 9.2
Net income (loss)	371.1					393.3		(22.2)
Net Income (Loss) Attributable to Parent	393.3
Other comprehensive income (loss)	(15.3)		0.0	0.0	0.0	0.0	(16.6)	1.3
Issuance of ordinary shares	(34.9)		0.2	0.0	(35.1)	0.0	0.0	0.0
Treasury shares (Note 15)	5.5		0.0	36.6	(31.1)	0.0	0.0	0.0
Dividends (Note 15)	(262.6)	€ (236.6)				(262.6)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders								0.0
Share-based compensation (Note 16)	22.0				22.0
Other	1.9				1.9
Ending balance at Dec. 31, 2016	5,044.1		114.7	(44.5)	2,683.1	3,404.1	(1,101.6)	(11.7)
Net income (loss)	134.2					113.3		20.9
Net Income (Loss) Attributable to Parent	113.3
Other comprehensive income (loss)	98.3		0.0	0.0	0.0	0.0	97.9	0.4
Issuance of ordinary shares due to the merger of FMC Technologies and Technip	8,170.7		351.9	(6.6)	7,825.4	0.0	0.0	0.0
Cancellation of treasury shares due to the merger of FMC Technologies and Technip	21.2			44.5	23.3
Cancellation treasury shares (Note 15)	58.5		2.1	0.0	47.6	8.8	0.0	0.0
Issuance of ordinary shares	1.2		0.6	0.0	0.6	0.0	0.0	0.0
Net sales of ordinary shares for employee benefit trust	1.8			1.8	0.0
Dividends (Note 15)	(60.6)	€ (60.6)	0.0	0.0	0.0	(60.6)	0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders								0.0
Share-based compensation (Note 16)	44.4		0.0	0.0	44.4	0.0	0.0	0.0
Other	12.6		0.0	0.0	0.7	0.0	0.0	11.9
Ending balance at Dec. 31, 2017	13,409.4		465.1	(4.8)	10,483.3	3,448.0	(1,003.7)	21.5
Adoption of accounting standards (Note 4)	(91.4)					(91.5)		0.1
Net income (loss)	(1,910.8)							10.8
Net Income (Loss) Attributable to Parent	(1,921.6)
Other comprehensive income (loss)	(360.6)		0.0	0.0	0.0	0.0	(356.0)	(4.6)
Cancellation treasury shares (Note 15)	(442.8)		(14.8)	0.0	(333.5)	(94.5)	0.0	0.0
Issuance of ordinary shares	0.2		0.2		0.0	0.0
Net sales of ordinary shares for employee benefit trust	2.4		0.0	2.4	0.0	0.0	0.0	0.0
Dividends (Note 15)	(238.1)		0.0	0.0	0.0	(238.1)	0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders								0.0
Share-based compensation (Note 16)	49.1		0.0	0.0	49.1	0.0	0.0	0.0
Other	13.5		0.0	0.0	(1.9)	11.9	0.0	3.5
Ending balance at Dec. 31, 2018	$ 10,430.9		$ 450.5	$ (2.4)	$ 10,197.0	$ 1,114.2	$ (1,359.7)	$ 31.3