Employee Benefit Plans - Summary of Restricted Stock and Stock Unit Activity (Details) - Restricted Stock Units - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jan. 28, 2023	Jul. 30, 2022
Restricted Stock/ Stock Units
Beginning balance (in shares)	97	94
Granted and assumed (in shares)	56	52
Vested (in shares)	(21)	(37)
Canceled/forfeited/other (in shares)	(5)	(12)
Ending balance (in shares)	127	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)	40.62	50.06
Vested (in dollars per share)	47.39	42.27
Canceled/forfeited/other (in dollars per share)	45.73	45.63
Ending balance (in dollars per share)	$ 43.92	$ 46.67
Aggregate Fair  Value
Vested	$ 923	$ 1,979