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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income attributable to FMC Technologies, Inc.	$ 82.0	$ 169.8	$ 337.5	$ 531.3
Weighted average number of shares outstanding	230.2	236.4	231.6	236.8
Dilutive effect of restricted stock units and stock options	0.8	0.6	0.9	0.5
Total shares and dilutive securities	231.0	237.0	232.5	237.3
Basic earnings per share attributable to FMC Technologies, Inc.	$ 0.36	$ 0.72	$ 1.46	$ 2.24
Diluted earnings per share attributable to FMC Technologies, Inc.	$ 0.35	$ 0.72	$ 1.45	$ 2.24