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Fair Value Measurements Fair Value Measurements Narrative (Details) (USD $) In Millions, unless otherwise specified	Feb. 01, 2015	Aug. 03, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 42	$ 46
Long-term Debt	2,263us-gaap_LongTermDebt	2,544us-gaap_LongTermDebt
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	42	46
Long-term Debt, Fair Value	$ 2,397	$ 2,647

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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