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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
Jul. 29, 2017
Jul. 30, 2016
Jul. 29, 2017
Jul. 30, 2016
Jan. 28, 2017
Derivatives, Fair Value [Line Items]          
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax $ (28) $ 5 $ (18) $ (11)  
Interest Rate Fair Value Hedges 2 8 2 8 $ 2
Foreign Currency Cash Flow Hedge Asset at Fair Value 8 16 8 16 18
Foreign Currency Cash Flow Hedge Liability at Fair Value 11   11   1
Other Current Assets [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Asset at Fair Value 8 0 8 0 18
Accounts Payable and Accrued Liabilities [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Liability at Fair Value 8 0 8 0 1
Other Assets [Member]          
Derivatives, Fair Value [Line Items]          
Interest Rate Fair Value Hedges 2 8 2 8 2
Foreign Currency Cash Flow Hedge Asset at Fair Value 0 16 0 16 0
Other Noncurrent Liabilities [Member]          
Derivatives, Fair Value [Line Items]          
Foreign Currency Cash Flow Hedge Liability at Fair Value $ 3 $ 0 $ 3 $ 0 $ 0