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Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Schedule of Funds Held for Customers (Details) - USD ($)
$ in Millions
Jan. 31, 2026
Jul. 31, 2025
Jan. 31, 2025
Jul. 31, 2024
Cash And Cash Equivalents, Investments, And Funds Receivable And Amounts Held For Customers [Abstract]        
Restricted cash and restricted cash equivalents $ 3,841 $ 6,597 $ 2,907 $ 3,490
Restricted available-for-sale debt securities 150 150 150 150
Funds receivable 423 329 277 281
Total funds receivable and amounts held for customers $ 4,414 $ 7,076 $ 3,334 $ 3,921