Goodwill and Purchased Intangible Assets - Schedule of Amortization of Purchased Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	May 01, 2021	Apr. 30, 2022	May 01, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	$ 77	$ 61	$ 240	$ 136
Total
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	272	248	838	649
Cost of sales
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	180	187	583	513
Operating expenses
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	$ 92	$ 61	$ 255	$ 136