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Leases - Supplemental Information (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 30, 2022
Jul. 31, 2021
Leases [Abstract]    
Cash paid for amounts included in the measurement of lease liabilities — operating cash flows $ 408 $ 407
Right-of-use assets obtained in exchange for operating leases liabilities $ 331 $ 536