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Intangible Assets (Tables)
 12 Months Ended
Jan. 29, 2017
Notes to financial statements [Abstract]  
Amortizable Intangible Assets Components
 
January 29, 2017
 
January 31, 2016
 
Gross 
Carrying
Amount
 
Accumulated
Amortization
 
Net 
Carrying
Amount
 
Gross 
Carrying
Amount
 
Accumulated
Amortization
 
Net 
Carrying
Amount
 
(In millions)
 
(In millions)
Acquisition-related intangible assets
$
193

 
$
(167
)
 
$
26

 
$
193

 
$
(152
)
 
$
41

Patents and licensed technology
468

 
(390
)
 
78

 
462

 
(337
)
 
125

Total intangible assets
$
661

 
$
(557
)
 
$
104

 
$
655

 
$
(489
)
 
$
166