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, 2014	$ 5,296.2		$ 110.2	$ (127.4)	$ 2,451.9	$ 3,559.1	$ (711.9)	$ 14.3
Net income	14.0					14.4		(0.4)
Other comprehensive income	(375.7)						(373.1)	(2.6)
Treasury shares (Note 16)	6.8			46.3	(39.5)
Net capital transactions	280.4		4.3		276.1
Dividends (Note 16)	(300.1)	€ (225.8)				(300.1)
Share-based compensation (Note 19)	36.1				36.1
Other	(1.3)				0.8			(2.1)
Ending 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	371.1					393.3		(22.2)
Other comprehensive income	(15.3)						(16.6)	1.3
Treasury shares (Note 16)	5.5			36.6	(31.1)
Net capital transactions	(34.9)		0.2		(35.1)
Dividends (Note 16)	(262.6)	€ (236.6)				(262.6)
Share-based compensation (Note 19)	22.0				22.0
Other	1.9				1.9	0.0
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	134.2					113.3		20.9
Other comprehensive income	98.3						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
Cancellation of treasury shares due to the merger of FMC Technologies and Technip	21.2			44.5	(23.3)
Cancellation of treasury shares (Note 16)	(58.5)		(2.1)		(47.6)	(8.8)
Net sales of ordinary shares for employee benefit trust	1.8			1.8
Net capital transactions	1.2		0.6		0.6
Dividends (Note 16)	(60.6)					(60.6)
Share-based compensation (Note 19)	44.4				44.4
Other	12.6				0.7			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