Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021
Schedule of Investments [Line Items]
Net unsettled investment sales	$ 70
Marketable equity securities	241	$ 137
Net unrealized gain (loss) on marketable securities	(38)	8
Net gain on non-marketable equity securities measured using the measurement alternative	32	39
Investments in privately held companies	1,900
Funding commitments	400
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Investments in privately held companies	1,100
Net Asset Value (NAV) | Private equity funds
Schedule of Investments [Line Items]
Non-marketable equity securities included in other assets	$ 1,100	$ 900