Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	Apr. 29, 2023	Apr. 30, 2022	Jul. 30, 2022
Schedule of Investments [Line Items]
Net unsettled investment purchases	$ 9		$ 9
Net unsettled investment sales					$ 70
Marketable equity securities	346		346		241
Unrealized loss	2	$ 19	11	$ 32
Net loss (gain) on non-marketable equity securities measured using the measurement alternative	(7)	$ (11)	2	$ (28)
Investments in privately held companies	1,800		1,800		1,900
Funding commitments	300		300
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Investments in privately held companies	1,000		1,000
Private equity funds | Fair value measured at NAV per share
Schedule of Investments [Line Items]
Equity interests held in certain private equity funds	$ 900		$ 900		$ 1,100