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Derivative Instruments Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Jan. 28, 2017
Derivatives, Fair Value [Line Items]          
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax $ 11 $ 10 $ (8) $ (1)  
Interest Rate Fair Value Hedges 1 6 1 6 $ 2
Foreign Currency Cash Flow Hedge Asset at Fair Value 15 26 15 26 18
Foreign Currency Cash Flow Hedge Liability at Fair Value 4   4   1
Other Current Assets [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Asset at Fair Value 14 6 14 6 18
Accounts Payable and Accrued Liabilities [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Liability at Fair Value 4 0 4 0 1
Other Assets [Member]          
Derivatives, Fair Value [Line Items]          
Interest Rate Fair Value Hedges 1 6 1 6 2
Foreign Currency Cash Flow Hedge Asset at Fair Value $ 1 $ 20 $ 1 $ 20 $ 0