CONSOLIDATED CONDENSED STATEMENT OF CHANGES IN EQUITY (Unaudited) (USD $) In Millions	Total	Common Stock [Member]	Capital in Excess of Par value [Member]	Retained Earnings [Member]	Accumulated Other Elements of Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2012	$ 5,566.1	$ 2.6	$ 2,094.6	$ 4,120.7	$ (30.0)	$ (621.8)	$ 0
Formation of OneSubsea, net of tax effects of $132.6		0	1,051.8	0	0	0	915.6
Net income	481.2	0	0	478.4	0	0	2.8
Other comprehensive income (loss), net of tax	(62.2)	0	0	0	(62.2)	0	25.9
Non-cash stock compensation expense	40.7	0	40.7	0	0	0	0
Net change in treasury shares owned by participants in nonqualified deferred compensation plans		0	0	0	0	(2.3)	0
Purchase of treasury stock		0	0	0	0	(576.1)	0
Treasury stock issued under stock compensation plans		0	(25.4)	0	0	55.1	0
Tax benefit of stock compensation plan transactions		0	8.8	0	0	0	0
Contributions from noncontrolling interest owners		0	0	0	0	0	75.3
Purchases of noncontrolling ownership interests		0	0	0	0	0	(7.2)
Other noncontrolling interests	1,050.8	0	0	0	0	0	38.4
Balance at Sep. 30, 2013	$ 7,585.7	$ 2.6	$ 3,170.5	$ 4,599.1	$ 92.2	$ (1,145.1)	$ (1,050.8)