Debt Credit Facilities (Details) (USD $)	Aug. 02, 2014
New US Revolving Credit Facility, 364 Day [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Previous Borrowing Capacity	$ 500,000,000
New US Revolving Credit Facility, Five-Year [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	1,250,000,000
Debt Instrument, Basis Spread on Federal Funds Rate	0.50%
Debt Instrument, Basis Spread on LIBOR	1.00%
Debt Instrument, Lower Range on Annual Base Rate	0.00%
Debt Instrument, Higher Range on Annual Base Rate	0.925%
Debt Instrument, Basis Spread on Variable Rate, Low End of Range	1.00%
Debt Instrument, Basis Spread on Variable Rate, High End of Range	1.925%
Debt Instrument, Lower Range on Facility Fee	0.125%
Debt Instrument, Higher Range on Facility Fee	0.325%
US Revolving Credit Facility, Five-Year [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Previous Borrowing Capacity	$ 1,500,000,000