Business Segments (Schedule Of Segment Revenue And Segment Operating Profit) (Detail) - 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		178.4	234.8
Net interest expense		(82.1)	(13.3)
Income before income taxes	[1]	36.6	166.5
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		142.8	38.4
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		(1.1)
Corporate items
Segment Reporting Information
Corporate income (expense)	[2]	(59.7)	(55.0)
Net interest expense		(82.1)	(13.3)
Total corporate items		$ (141.8)	$ (68.3)

[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.