Acquisitions (Details) (USD $)	1 Months Ended	3 Months Ended
	Nov. 01, 2011	Dec. 31, 2011	Dec. 31, 2010
Business Combination, Description [Abstract]
Cost of acquired company, net of cash acquired	$ 250,000,000	$ 250,501,000	$ 0
Business Acquisition, Purchase Price Allocation, Goodwill Amount		172,400,000
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables		119,600,000
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory		41,700,000
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable		152,900,000
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		68,800,000
Acquired Business Annualized Revenues		700,000,000
Acquired Business Annualized Revenues Subject to Elimination		60,000,000
Acquired Business Actual Revenue Subject to Elimination		10,600,000
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		3,800,000
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		5
Customer Relationships Member
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		57,100,000
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		15
Computer Software, Intangible Asset [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Amount		$ 7,900,000
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life		5