Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 28, 2023	Jan. 29, 2022	Jan. 28, 2023	Jan. 29, 2022	Jul. 30, 2022
Schedule of Investments [Line Items]
Net unsettled investment purchases	$ 15		$ 15
Net unsettled investment sales					$ 70
Marketable equity securities	280		280		241
Net unrealized gain (loss) on marketable securities	11	$ (18)	(9)	$ (13)
Net loss (gain) on non-marketable equity securities measured using the measurement alternative	(3)	$ (14)	8	$ (16)
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	1,100		1,100
Private equity funds | Fair value measured at NAV per share
Schedule of Investments [Line Items]
Equity interests held in certain private equity funds	$ 1,000		$ 1,000		$ 1,100