Earnings Per Share (Reconciliation Of Number Of Shares Used For Basic And Diluted Earnings Per Share ("EPS") Calculation ) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net income attributable to FMC Technologies, Inc.	$ 55.6	$ 82.0	$ 107.9	$ 147.6	$ 168.6	$ 169.8	$ 226.3	[1]	$ 135.2	$ 393.1	$ 699.9	$ 501.4
Weighted average number of shares outstanding										230.9	236.3	238.3
Dilutive effect of restricted stock units and stock options										0.8	0.6	0.8
Total shares and dilutive securities										231.7	236.9	239.1
Basic earnings per share attributable to FMC Technologies, Inc.	$ 0.24	$ 0.36	$ 0.46	$ 0.63	$ 0.72	$ 0.72	$ 0.96		$ 0.57	$ 1.70	$ 2.96	$ 2.10
Diluted earnings per share attributable to FMC Technologies, Inc.	$ 0.24	$ 0.35	$ 0.46	$ 0.63	$ 0.72	$ 0.72	$ 0.95		$ 0.57	$ 1.70	$ 2.95	$ 2.10

[1] In the second quarter of 2014, we completed the sale of Material Handling Products and recognized a gain on the sale. Refer to Note 5 for additional information.