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Derivative Instruments - Schedule of Notional Amounts of Derivatives Outstanding (Details) - USD ($)
$ in Millions
Jan. 29, 2022
Jul. 31, 2021
Derivative [Line Items]    
Derivatives $ 6,982 $ 6,869
Foreign currency derivatives    
Derivative [Line Items]    
Derivatives 4,254 4,139
Interest rate derivatives    
Derivative [Line Items]    
Derivatives 2,000 2,000
Total return swaps—deferred compensation    
Derivative [Line Items]    
Derivatives $ 728 $ 730