Business Segments (Schedule Of Segment Revenue And Segment Operating Profit) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information
Revenue		$ 3,434.2	$ 2,960.9	$ 6,347.2	$ 6,086.1
Total segment operating profit		394.1	298.7	610.2	586.6
Corporate expense	[1]	(138.9)	(73.0)	(232.5)	(132.8)
Net interest expense		140.6	50.9	228.8	138.3
Total corporate items		(279.5)	(123.9)	(461.3)	(271.1)
Income (loss) before income taxes	[2]	114.6	174.8	148.9	315.5
Operating Segments | Subsea
Segment Reporting Information
Revenue		1,508.7	1,217.4	2,694.0	2,397.6
Total segment operating profit		94.6	75.9	144.5	130.3
Operating Segments | Onshore/Offshore
Segment Reporting Information
Revenue		1,505.0	1,342.4	2,840.1	2,915.8
Total segment operating profit		274.0	171.3	429.7	374.2
Operating Segments | Surface Technologies
Segment Reporting Information
Revenue		420.5	401.1	813.1	772.7
Total segment operating profit		$ 25.5	$ 51.5	$ 36.0	$ 82.1

[1] Corporate expense primarily includes corporate staff expenses, legal reserve, share-based compensation expenses, other employee benefits, certain foreign exchange gains and losses, and merger transaction and integration expenses.

[2] Includes amounts attributable to noncontrolling interests.