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Property And Equipment, Net (Details) - USD ($)
$ in Millions
3 Months Ended
Apr. 29, 2017
Apr. 30, 2016
Jan. 28, 2017
Property, Plant and Equipment [Line Items]      
Property and Equipment, at Cost $ 6,354 $ 5,818 $ 6,282
Accumulated Depreciation and Amortization (3,593) (3,395) (3,541)
Property and Equipment, Net 2,761 2,423 $ 2,741
Depreciation $ 142 $ 121