Business Segments (Schedule Of Segment Revenue And Segment Operating Profit) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information
Total revenue		$ 3,388.0	$ 2,405.7
Total segment operating profit		175.5	254.9
Net interest expense		(81.7)	(13.3)
Income before income taxes	[1]	298.0	194.8
Operating segments | Subsea
Segment Reporting Information
Total revenue		1,376.7	1,517.2
Total segment operating profit		54.2	196.4
Operating segments | Onshore/Offshore
Segment Reporting Information
Total revenue		1,764.0	888.5
Total segment operating profit		139.9	58.5
Operating segments | Surface Technologies
Segment Reporting Information
Total revenue		248.4
Total segment operating profit		(18.6)
Segment reconciling items
Segment Reporting Information
Total revenue	[2]	(1.1)
Corporate items
Segment Reporting Information
Corporate income (expense)	[1]	204.2	(46.8)
Net interest expense		(81.7)	(13.3)
Total corporate items		$ 122.5	$ (60.1)

[1] Includes amounts attributable to noncontrolling interests.

[2] Corporate expense primarily includes corporate staff expenses, stock-based compensation expenses, other employee benefits, certain foreign exchange gains and losses, and merger-related transaction expenses.