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Financial Instruments (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 30, 2016
USD ($)
contract
Aug. 01, 2015
USD ($)
Jul. 30, 2016
USD ($)
contract
Aug. 01, 2015
USD ($)
Jan. 30, 2016
USD ($)
Derivative [Line Items]          
Cash flow hedges $ 5 $ (4) $ 5 $ (4) $ 2
Derivatives Designated as Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]          
Derivative [Line Items]          
Notional value of contracts outstanding 82   82    
Amount of hedge gain (loss) included in AOCI     5    
Increase (decrease) in fair value of hedge positions $ 3   $ 3 (1)  
Derivatives Designated as Non-Hedging Instruments [Member]          
Derivative [Line Items]          
Number of contracts outstanding | contract 0   0    
Derivatives Designated as Non-Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]          
Derivative [Line Items]          
Notional value of contracts outstanding $ 14   $ 14    
Foreign exchange derivative NOT designated as cash flow hedges, gain (loss)   $ 1 $ (1) $ 2  
Derivatives Designated as Non-Hedging Instruments [Member] | Foreign Currency Option Contracts [Member]          
Derivative [Line Items]          
Number of contracts outstanding | contract 0   0    
Maximum [Member] | Derivatives Designated as Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]          
Derivative [Line Items]          
Derivative contracts maturity date     2017-07    
Maximum [Member] | Derivatives Designated as Non-Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]          
Derivative [Line Items]          
Derivative contracts maturity date     2016-12