Employee Benefit Plans - Summary of Restricted Stock and Stock Unit Awards (Details) - Restricted Stock/Stock Units - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021
Restricted Stock/ Stock Units
Unvested, Beginning balance (in shares)	97	94	96
Granted and assumed (in shares)	72	52	51
Vested (in shares)	(39)	(37)	(39)
Canceled/forfeited/other (in shares)	(8)	(12)	(14)
Unvested, Ending balance (in shares)	122	97	94
Weighted-Average Grant Date Fair Value per Share
Unvested, Beginning balance (in dollars per share)	$ 46.67	$ 42.93	$ 42.03
Granted and assumed (in dollars per share)	42.08	50.06	41.89
Vested (in dollars per share)	46.69	42.27	39.63
Canceled/forfeited/other (in dollars per share)	45.17	45.63	42.13
Unvested, Ending balance (in dollars per share)	$ 44.04	$ 46.67	$ 42.93
Aggregate Fair  Value
Vested	$ 1,746	$ 1,979	$ 1,813