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Derivative Instruments Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 29, 2017
Apr. 30, 2016
Jan. 28, 2017
Derivatives, Fair Value [Line Items]      
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax $ 10 $ (16)  
Interest Rate Fair Value Hedges 2 10 $ 2
Foreign Currency Cash Flow Hedge Asset at Fair Value 27 11 18
Foreign Currency Cash Flow Hedge Liability at Fair Value 1 0 1
Other Current Assets [Member]      
Derivatives, Fair Value [Line Items]      
Foreign Currency Cash Flow Hedge Asset at Fair Value 27 0 18
Other Assets [Member]      
Derivatives, Fair Value [Line Items]      
Interest Rate Fair Value Hedges 2 10 2
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 0 $ 11 $ 0