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

 
$
(178
)
 
$
15

 
$
193

 
$
(167
)
 
$
26

Patents and licensed technology
469

 
(421
)
 
48

 
468

 
(390
)
 
78

Total intangible assets
$
662

 
$
(599
)
 
$
63

 
$
661

 
$
(557
)
 
$
104