Business Segments (Schedule Of Segment Revenue And Segment Operating Profit) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information
Total revenue		$ 1,150.3	$ 1,695.2	$ 2,359.0	$ 3,390.4
Total segment operating profit		83.5	216.3	161.1	450.8
Net interest expense		(7.6)	(9.0)	(15.1)	(16.3)
Income before income taxes attributable to FMC Technologies, Inc.	[1]	9.6	163.8	35.4	348.3
Operating segments | Subsea Technologies
Segment Reporting Information
Total revenue		854.2	1,239.4	1,718.2	2,396.6
Total segment operating profit		97.2	183.5	206.7	352.2
Operating segments | Surface Technologies
Segment Reporting Information
Total revenue		218.7	363.3	484.2	809.6
Total segment operating profit		(21.7)	27.5	(50.3)	90.4
Operating segments | Energy Infrastructure
Segment Reporting Information
Total revenue		85.1	101.4	169.2	202.3
Total segment operating profit		7.8	5.3	4.5	8.2
Segment reconciling items
Segment Reporting Information
Total revenue	[2]	(7.7)	(8.9)	(12.6)	(18.1)
Intercompany eliminations
Segment Reporting Information
Total segment operating profit		0.2		0.2
Corporate items
Segment Reporting Information
Corporate expense	[3]	(13.1)	(14.0)	(27.4)	(30.3)
Other revenue and other expense, net	[2],[4]	(53.2)	(29.5)	(83.2)	(55.9)
Net interest expense		(7.6)	(9.0)	(15.1)	(16.3)
Total corporate items		$ (73.9)	$ (52.5)	$ (125.7)	$ (102.5)

[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.