Acquisitions and Dispositions (Details 1) In Millions, unless otherwise specified	6 Months Ended			6 Months Ended
	Jun. 30, 2012 Optima Solutions [Member] USD ($)	Mar. 31, 2012 Optima Solutions [Member] USD ($)	Mar. 31, 2012 Optima Solutions [Member] GBP (£)	Jun. 30, 2012 Eastern Reservoir Services [Member] USD ($)	Apr. 30, 2012 Eastern Reservoir Services [Member] USD ($)	Jul. 31, 2012 Greywolf Production Systems [Member] USD ($)
Business Acquisitions [Line Items]
Percentage of outstanding common stock acquired		100.00%	100.00%
Purchase price			£ 41.2		$ 42.5	$ 55.5
Purchase price (USD equivalent)		65
Contingent consideration, maximum possible payment			4
Purchase price allocation, net working capital		3
Purchase price allocation, property, plant, and equipment		16.8			18.0
Purchase price allocation, intangible assets		20.4			6.8
Purchase price allocation, other liabilities		3.5
Purchase price allocation, deferred tax liabilities		6.1
Purchase price allocation, nondeductible goodwill		34.5			17.7
Revenues from acquired entitiy	8.6			7.0
Depreciation and amortization from acquired entity	1.7			0.7
Pretax earnings from acquired entity	2.2			2.5
Transaction costs associated with acquisition		$ 1.3			$ 0.3