Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Schedule of Funds Held for Customers (Details) - USD ($) $ in Millions	Oct. 31, 2025	Jul. 31, 2025	Oct. 31, 2024	Jul. 31, 2024
Cash And Cash Equivalents, Investments, And Funds Receivable And Amounts Held For Customers [Abstract]
Restricted cash and restricted cash equivalents	$ 3,437	$ 6,597	$ 5,162	$ 3,490
Restricted available-for-sale debt securities and funds receivable	481	479	444	431
Total funds receivable and amounts held for customers	$ 3,918	$ 7,076	$ 5,606	$ 3,921