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Commitments and Contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 27, 2019
Jan. 28, 2018
Jan. 29, 2017
Commitments and Contingencies Disclosure [Abstract]      
Outstanding inventory purchase obligation $ 912    
Outstanding capital purchase obligations 258    
Future minimum operating lease payments - HQ 326    
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
2020 100    
2021 97    
2022 90    
2023 77    
2024 54    
2025 and thereafter 265    
Total 683    
Rent expense 80 $ 54 $ 46
Product returns and warranty liabilities [1] $ 18 $ 15  
[1] Refer to Note 12 of these Notes to the Consolidated Financial Statements for a discussion regarding warranties.