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Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 29, 2017
Oct. 30, 2016
Oct. 29, 2017
Oct. 30, 2016
Jan. 29, 2017
Amortizable intangible assets components          
Amortization expense $ 13 $ 18 $ 42 $ 53  
Future amortization expense associated with intangible assets          
Remainder of fiscal 2018 12   12    
Fiscal 2019 26   26    
Fiscal 2020 16   16    
Fiscal 2021 8   8    
Fiscal 2022 and beyond 1   1    
Acquisition-related intangible assets          
Amortizable intangible assets components          
Gross Carrying Amount 193   193   $ 193
Accumulated Amortization (178)   (178)   (167)
Net Carrying Amount 15   15   26
Patents and licensed technology          
Amortizable intangible assets components          
Gross Carrying Amount 469   469   468
Accumulated Amortization (421)   (421)   (390)
Net Carrying Amount 48   48   78
Total intangible assets          
Amortizable intangible assets components          
Gross Carrying Amount 662   662   661
Accumulated Amortization (599)   (599)   (557)
Net Carrying Amount $ 63   $ 63   $ 104