Available-for-Sale Debt and Equity Investments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 30, 2021	Jul. 31, 2021
Schedule of Investments [Line Items]
Net unrealized gains on marketable securities	$ 5
Net loss (gain) on non-marketable equity securities measured using the measurement alternative	(2)
Investments in privately held companies	1,700	$ 1,500
Funding commitments	200
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Investments in privately held companies	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	$ 1,000	$ 900