Goodwill and Purchased Intangible Assets - Schedule of Amortization of Purchased Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2021	Oct. 24, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	$ 84	$ 36
Total
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	286	206
Cost of sales
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	202	170
Operating expenses
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of purchased intangible assets	$ 84	$ 36