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Amortizable Intangible Assets (Tables)
 12 Months Ended
Jan. 28, 2018
Notes to financial statements [Abstract]  
Amortizable Intangible Assets Components
 
January 28, 2018
 
January 29, 2017
 
Gross 
Carrying
Amount
 
Accumulated
Amortization
 
Net 
Carrying
Amount
 
Gross 
Carrying
Amount
 
Accumulated
Amortization
 
Net 
Carrying
Amount
 
(In millions)
 
(In millions)
Acquisition-related intangible assets
$
195

 
$
(180
)
 
$
15

 
$
193

 
$
(167
)
 
$
26

Patents and licensed technology
469

 
(432
)
 
37

 
468

 
(390
)
 
78

Total intangible assets
$
664

 
$
(612
)
 
$
52

 
$
661

 
$
(557
)
 
$
104