Business Segment Information (Schedule Of Segment Revenue And Segment Operating Profit) (Details) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) customer
Segment Reporting Information [Line Items]
Revenue		$ 1,427.3	$ 1,545.0	$ 1,695.2	$ 1,695.2	$ 2,156.2	$ 1,976.7	$ 1,985.3	$ 1,824.4	$ 6,362.7	$ 7,942.6	$ 7,126.2
Total segment operating profit										694.2	1,193.4	879.6
Income before income taxes attributable to FMC Technologies, Inc.	[1]									500.9	1,060.9	$ 714.0
Subsea Technologies
Segment Reporting Information [Line Items]
Number of major customers in business segment | customer												1
Major customer one | Subsea Technologies
Segment Reporting Information [Line Items]
Revenue												$ 875.9
Operating Segments | Subsea Technologies
Segment Reporting Information [Line Items]
Revenue										4,509.0	5,266.4	4,726.9	[2]
Total segment operating profit	[3]									630.2	748.2	548.2
Operating Segments | Surface Technologies
Segment Reporting Information [Line Items]
Revenue										1,487.6	2,130.7	1,806.8
Total segment operating profit	[3]									60.6	393.0	257.2
Operating Segments | Energy Infrastructure
Segment Reporting Information [Line Items]
Revenue										395.4	557.4	617.2
Total segment operating profit	[3]									3.2	52.5	74.3
Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenue	[4]									(29.3)	(11.9)	(24.7)
Intercompany Eliminations
Segment Reporting Information [Line Items]
Total segment operating profit										0.2	(0.3)	(0.1)
Corporate
Segment Reporting Information [Line Items]
Corporate expense	[5]									(60.2)	(66.3)	(46.3)
Other revenue and other expense, net	[4],[6]									(100.8)	(33.7)	(85.6)
Net interest expense										(32.3)	(32.5)	(33.7)
Total Corporate Items										$ (193.3)	$ (132.5)	$ (165.6)

[1] Excludes amounts attributable to noncontrolling interests.

[2] We had one customer in our Subsea Technologies segment that comprised approximately $875.9 million of our consolidated revenue for the year ended December 31, 2013

[3] Includes restructuring and impairment expenses in 2015 and 2014. Refer to Note 4 for additional information.

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

[5] Corporate expense primarily includes corporate staff expenses.

[6] 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.