Debt (The Receivables Facility) (Narrative) (Details) (USD $)			1 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Feb. 29, 2012 Receivables Facility	Sep. 30, 2012 Receivables Facility	Jul. 20, 2012 Receivables Facility
Debt Instrument [Line Items]
Receivables Facility maximum borrowing capacity			$ 300,000,000	$ 400,000,000	$ 400,000,000
Receivables Facility, maximum commitment limit			500,000,000
Debt instrument, maturity date, description			3 years
Securitized accounts receivable	562,900,000
Short-term borrowings	$ 416,671,000	$ 128,054,000		$ 300,000,000
Interest rate on borrowings				1.01%