Employee Benefit Plans - Summary of Restricted Stock and Stock Unit Activity (Details) - Restricted Stock Units - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended	12 Months Ended
	Apr. 29, 2023	Jul. 30, 2022
Restricted Stock/ Stock Units
Beginning balance (in shares)	97	94
Granted and assumed (in shares)	58	52
Vested (in shares)	(29)	(37)
Canceled/forfeited/other (in shares)	(8)	(12)
Ending balance (in shares)	118	97
Weighted-Average Grant Date Fair Value per Share
Beginning balance (in dollars per share)	$ 46.67	$ 42.93
Granted and assumed (in dollars per share)	40.87	50.06
Vested (in dollars per share)	47.24	42.27
Canceled/forfeited/other (in dollars per share)	45.34	45.63
Ending balance (in dollars per share)	$ 43.76	$ 46.67
Aggregate Fair  Value
Vested	$ 1,303	$ 1,979