Quarterly Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial information

	2017										2016
(In millions, except per share data)	4th Qtr.			3rd Qtr.		2nd Qtr.		1st Qtr.			4th Qtr.			3rd Qtr.		2nd Qtr.		1st Qtr.
Revenue	$	3,683.0		$	4,140.9	$	3,845.0	$	3,388.0		$	2,047.7		$	2,375.7	$	2,370.5	$	2,405.7
Cost of sales	2,914.1			3,468.2		3,162.0		2,980.3			1,766.3			1,931.0		1,927.0		2,005.7
Net income (loss)	(127.5		)	117.9		159.0		(15.2		)	(155.0		)	301.7		103.8		120.6
Net income (loss) attributable to TechnipFMC plc	$	(153.9	)	$	121.0	$	164.9	$	(18.7	)	$	(133.8	)	$	302.4	$	104.0	$	120.7
Basic earnings (loss) per share	$	(0.33	)	$	0.26	$	0.35	$	(0.04	)	$	(1.13	)	$	2.50	$	0.87	$	1.02
Diluted earnings (loss) per share	$	(0.33	)	$	0.26	$	0.35	$	(0.04	)	$	(1.13	)	$	2.39	$	0.83	$	0.97