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Fair Value Measurements (Narrative) (Details) (USD $)	Jan. 31, 2015	Feb. 01, 2014	Jan. 28, 2012	Jan. 29, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 1,407,000,000	$ 971,000,000	$ 537,000,000	$ 1,205,000,000
Long-term Debt, Fair Value	3,100,000,000us-gaap_LongTermDebtFairValue	3,000,000,000us-gaap_LongTermDebtFairValue
Long-term debt	$ 2,793,000,000us-gaap_LongTermDebtNoncurrent	$ 2,792,000,000us-gaap_LongTermDebtNoncurrent

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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