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Financial Instruments (Fair Value Derivative Contracts on Gross Basis by Type of Contract) (Details) - Forward Foreign Exchange Contracts [Member] - USD ($)
$ in Millions
Oct. 28, 2017
Jan. 28, 2017
Oct. 29, 2016
Derivatives Designated as Hedging Instruments [Member] | Current Assets [Member]      
Derivative [Line Items]      
Fair value of derivative hedging assets $ 2 $ 3 $ 7
Derivatives Designated as Hedging Instruments [Member] | Current Liabilities [Member]      
Derivative [Line Items]      
Fair value of derivative hedging liability $ 1 $ 3  
Derivatives Designated as Non-Hedging Instruments [Member] | Current Assets [Member]      
Derivative [Line Items]      
Fair value of derivative hedging assets     $ 1