Debt (Narrative) (Details) (USD $)	0 Months Ended
	Mar. 19, 2014	Jul. 28, 2014	Apr. 30, 2013	Aug. 13, 2014	Dec. 26, 2014	Aug. 14, 2014
Senior Notes | 3.50% Senior Notes
Debt Instrument [Line Items]
Face amount			$ 300,000,000
Stated interest rate			3.50%
Senior Notes | 4.75% Senior Notes
Debt Instrument [Line Items]
Face amount			600,000,000
Stated interest rate			4.75%
Senior Notes | 5.75% Senior Notes
Debt Instrument [Line Items]
Face amount				900,000,000
Stated interest rate				5.75%
Secured Debt | Term Loan
Debt Instrument [Line Items]
Face amount	1,300,000,000
Frequency of interest payments	90 days
Quarterly principal amortization payments	0.25%
Original issue discount, percentage	0.25%
Original issue discount, amount	3,300,000
Original issue discount, remaining					2,900,000
Interest rate					3.25%
Borrowings outstanding, term loans					1,300,000,000
Secured Debt | Receivable Securitization
Debt Instrument [Line Items]
Maximum borrowing capacity		160,000,000
Borrowings outstanding, credit facilities					150,000,000
Interest rate					0.96%
Future contingent maximum borrowing capacity		300,000,000
Variable interest rate margin		0.80%
Secured Debt | New Term Loan
Debt Instrument [Line Items]
Face amount						700,000,000
Quarterly principal amortization payments						0.25%
Interest rate					3.50%
Borrowings outstanding, term loans					700,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	250,000,000
Borrowings outstanding, credit facilities					0
Interest rate					3.00%
LIBOR | Secured Debt | Term Loan
Debt Instrument [Line Items]
Minimum LIBOR	0.75%
Letter of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	150,000,000
Borrowings outstanding, credit facilities					$ 0