Investments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024	Jul. 27, 2024
Schedule of Investments [Line Items]
Marketable equity securities	$ 339		$ 339		$ 481
Net unrealized gain (loss) on marketable securities	16	$ 55	(36)	$ 17
Net loss (gain) on non-marketable equity securities measured using the measurement alternative	8	$ 134	16	$ 134
Investments in privately held companies	1,900		1,900		1,800
Funding commitments	200		200
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Investments in privately held companies	800		800
Private equity funds | Fair value measured at NAV per share
Schedule of Investments [Line Items]
Equity interests held in certain private equity funds	$ 700		$ 700		$ 800