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Commitments and Contingencies - Schedule of Product Warranty Liability (Details) - USD ($)
$ in Millions
3 Months Ended
Oct. 30, 2021
Oct. 24, 2020
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at beginning of period $ 336 $ 331
Provisions for warranties issued 114 121
Adjustments for pre-existing warranties 2 1
Settlements (111) (122)
Balance at end of period $ 341 $ 331