Business Segments (Segment Operating Capital Employed And Segment Assets) (Details) - USD ($) $ in Millions		Jun. 30, 2016	Dec. 31, 2015
Segment Reporting Information
Total assets		$ 6,160.8	$ 6,419.4
Operating segments
Segment Reporting Information
Total segment operating capital employed	[1]	3,198.5	3,219.1
Total assets		4,770.7	5,025.2
Operating segments | Subsea Technologies
Segment Reporting Information
Total segment operating capital employed	[1]	2,092.3	2,025.7
Total assets		3,381.9	3,512.3
Operating segments | Surface Technologies
Segment Reporting Information
Total segment operating capital employed	[1]	837.5	911.9
Total assets		1,047.3	1,131.9
Operating segments | Energy Infrastructure
Segment Reporting Information
Total segment operating capital employed	[1]	268.7	281.5
Total assets		380.7	396.7
Segment reconciling items
Segment Reporting Information
Segment liabilities included in total segment operating capital employed	[2]	1,572.2	1,806.1
Intercompany eliminations
Segment Reporting Information
Total assets		(39.2)	(15.7)
Corporate
Segment Reporting Information
Total assets	[3]	$ 1,390.1	$ 1,394.2

[1] FMC Technologies’ management views segment operating capital employed, which consists of assets, net of its liabilities, as the primary measure of segment capital. Segment operating capital employed excludes debt, pension liabilities, income taxes, and LIFO and valuation adjustments.

[2] Segment liabilities included in total segment operating capital employed consist of trade and other accounts payable, advance payments and progress billings, accrued payroll and other liabilities.

[3] Corporate includes cash, LIFO adjustments, deferred income tax balances, property, plant and equipment not associated with a specific segment, pension assets and the fair value of derivative financial instruments.