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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. 27, 2024
Jul. 29, 2023
Restricted Stock/ Stock Units    
Beginning balance (in shares) 122 97
Granted and assumed (in shares) 48 72
Vested (in shares) (34) (39)
Canceled/forfeited/other (in shares) (4) (8)
Ending balance (in shares) 132 122
Weighted-Average Grant Date Fair Value per Share    
Beginning balance (in dollars per share) $ 44.04 $ 46.67
Granted and assumed (in dollars per share) 50.58 42.08
Vested (in dollars per share) 42.87 46.69
Canceled/forfeited/other (in dollars per share) 44.50 45.17
Ending balance (in dollars per share) $ 46.69 $ 44.04
Aggregate Fair  Value    
Vested $ 1,733 $ 1,746