Business Segments (Details) (USD $) In Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Segment Reporting Information [Line Items]
Revenues	$ 1,741.1		$ 1,452.7		$ 3,242.3		$ 2,799.4
Income (loss) before income taxes	187.4		172.3		327.2		332.8
Drilling And Production Systems [Member]
Segment Reporting Information [Line Items]
Revenues	1,002.7	[1]	836.4	[1]	1,868.3	[1]	1,656.1	[1]
Income (loss) before income taxes	161.4	[1]	145.4	[1]	277.6	[1]	302.0	[1]
Valves And Measurement Systems [Member]
Segment Reporting Information [Line Items]
Revenues	426.5		325.3		766.4		624.4
Income (loss) before income taxes	75.5		45.3		130.7		94.3
Process and Compression Systems [Member]
Segment Reporting Information [Line Items]
Revenues	311.9	[1]	291.0	[1]	607.6	[1]	518.9	[1]
Income (loss) before income taxes	34.0	[1]	39.5	[1]	64.5	[1]	54.9	[1]
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ (83.5)		$ (57.9)		$ (145.6)		$ (118.4)

[1] Prior year amounts have been retrospectively revised to reflect the change in segments described in Note 1 of the Notes to Consolidated Condensed Financial Statements.