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Fair Value Measurements Fair Value Measurements Narrative (Details) - USD ($)
$ in Millions
May. 01, 2016
Aug. 02, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, at Carrying Value $ 64 $ 39
Long-term Debt 2,552 2,552
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and Cash Equivalents, Fair Value Disclosure 64 39
Long-term Debt, Fair Value $ 2,686 $ 2,623