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. 25, 2025	Jul. 27, 2024
Restricted Stock/ Stock Units
Beginning balance (in shares)	117	122
Granted and assumed (in shares)	51	63
Vested (in shares)	(41)	(58)
Canceled/forfeited/other (in shares)	(6)	(10)
Ending balance (in shares)	121	117
Weighted-Average Grant Date Fair Value per Share
Beginning balance (in dollars per share)	$ 46.86	$ 44.04
Granted and assumed (in dollars per share)	53.32	48.97
Vested (in dollars per share)	47.68	43.46
Canceled/forfeited/other (in dollars per share)	46.83	45.65
Ending balance (in dollars per share)	$ 49.31	$ 46.86
Aggregate Fair  Value
Vested	$ 2,110	$ 2,906