Business Segments (Schedule Of Segment Revenue And Segment Operating Profit) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information
Total revenue		$ 1,091.2	$ 1,545.0	$ 3,450.2	$ 4,935.4
Total segment operating profit		102.5	146.2	263.6	597.0
Net interest expense		(7.7)	(8.1)	(22.8)	(24.4)
Income before income taxes attributable to FMC Technologies, Inc.	[1]	36.8	101.5	72.6	449.8
Operating segments | Subsea Technologies
Segment Reporting Information
Total revenue		798.4	1,093.7	2,516.6	3,490.3
Total segment operating profit		119.7	170.7	326.4	522.9
Operating segments | Surface Technologies
Segment Reporting Information
Total revenue		218.1	361.0	702.3	1,170.6
Total segment operating profit		(19.6)	(22.5)	(69.9)	67.9
Operating segments | Energy Infrastructure
Segment Reporting Information
Total revenue		77.1	97.1	246.3	299.4
Total segment operating profit		2.5	(2.0)	7.0	6.2
Segment reconciling items
Segment Reporting Information
Total revenue	[2]	(2.4)	(6.8)	(15.0)	(24.9)
Intercompany eliminations
Segment Reporting Information
Total segment operating profit		(0.1)		0.1
Corporate items
Segment Reporting Information
Corporate expense	[3]	(14.2)	(14.7)	(41.6)	(45.0)
Other revenue and other expense, net	[2],[4]	(43.8)	(21.9)	(126.6)	(77.8)
Net interest expense		(7.7)	(8.1)	(22.8)	(24.4)
Total corporate items		$ (65.7)	$ (44.7)	$ (191.0)	$ (147.2)

[1] Excludes amounts attributable to noncontrolling interests.

[2] Other revenue comprises certain unrealized gains and losses on derivative instruments related to unexecuted sales contracts.

[3] Corporate expense primarily includes corporate staff expenses.

[4] Other expense, net, generally includes stock-based compensation, other employee benefits, LIFO adjustments, certain foreign exchange gains and losses, and the impact of unusual or strategic transactions not representative of segment operations.