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Leases - Supplemental Cash Flows (Details) - USD ($)
$ in Millions
6 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Leases [Abstract]    
Cash paid for amounts included in the measurement of operating lease liabilities $ 55 $ 57
Right-of-use assets obtained in exchange for operating lease liabilities $ 102 $ 151