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Organization and Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 26, 2020
Jan. 27, 2019
Jan. 28, 2018
Accounting Policies [Abstract]      
Advertising expense $ 15 $ 21 $ 25
Deferred tax assets, valuation allowance $ 621 $ 562  
Building      
Property, Plant and Equipment [Line Items]      
Property, plant & equipment, useful life 30 years    
Minimum      
Finite-Lived Intangible Assets [Line Items]      
Warranty liability, term 1 year    
Intangible assets, useful life 3 years    
Property, Plant and Equipment [Line Items]      
Property, plant & equipment, useful life 3 years    
Minimum | Building      
Property, Plant and Equipment [Line Items]      
Property, plant & equipment, useful life 25 years    
Maximum      
Finite-Lived Intangible Assets [Line Items]      
Warranty liability, term 3 years    
Intangible assets, useful life 10 years    
Property, Plant and Equipment [Line Items]      
Property, plant & equipment, useful life 5 years    
Maximum | Building      
Property, Plant and Equipment [Line Items]      
Property, plant & equipment, useful life 30 years    
Significant Customer | Accounts Receivable | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk (as percent) 21.00% 19.00%