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Goodwill and Purchased Intangible Assets - Schedule of Amortization of Purchased Intangible Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Jul. 29, 2023
Jul. 30, 2022
Jul. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangible assets $ 282 $ 313 $ 215
Cost of sales      
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangible assets 649 749 716
Operating expenses      
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangible assets 282 328 215
Total      
Acquired Finite-Lived Intangible Assets [Line Items]      
Amortization of purchased intangible assets $ 931 $ 1,077 $ 931