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Derivative Instruments Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 01, 2015
Aug. 02, 2014
Aug. 01, 2015
Aug. 02, 2014
Jan. 31, 2015
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Liability at Fair Value   $ 26   $ 26  
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 25   $ 25   $ 21
Other Assets [Member]          
Derivatives, Fair Value [Line Items]          
Interest Rate Fair Value Hedge Asset at Fair Value 7 3 7 3 12
Foreign Currency Cash Flow Hedge Asset at Fair Value 25 0 25 0 21
Other Long-term Liabilities [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Liability at Fair Value 0 26 0 26 $ 0
Other Comprehensive Income (Loss) [Member]          
Derivatives, Fair Value [Line Items]          
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax $ 14 $ (5) $ 4 $ (13)