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Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 30, 2016
May. 02, 2015
Jan. 30, 2016
Derivative [Line Items]      
Cash flow hedges $ 2 $ (4) $ 2
Derivatives Designated as Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]      
Derivative [Line Items]      
Notional value of contracts outstanding 97    
Amount of hedge gain (loss) included in AOCI 2    
Increase (decrease) in fair value of hedge positions   1  
Derivatives Designated as Non-Hedging Instruments [Member] | Forward Foreign Exchange Contracts [Member]      
Derivative [Line Items]      
Notional value of contracts outstanding 12    
Foreign exchange derivative NOT designated as cash flow hedges, gain (loss) $ (1) $ 1  
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 2016-10    
Maximum [Member] | Derivatives Designated as Non-Hedging Instruments [Member] | Diesel Fuel Forward Contracts [Member]      
Derivative [Line Items]      
Derivative contracts maturity date 2016-05