Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Schedule of Classification on Balance Sheets (Details) - USD ($) $ in Millions	Jan. 31, 2025	Jul. 31, 2024	Jan. 31, 2024	Jul. 31, 2023
Amortized Cost
Cash and cash equivalents	$ 2,435	$ 3,609	$ 1,474
Investments	24	465
Funds receivable and amounts held for customers	3,334	3,921
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	5,793	7,995
Fair Value
Cash and cash equivalents	2,435	3,609
Investments	24	465
Funds receivable and amounts held for customers	3,334	3,921	$ 3,390	$ 420
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	$ 5,793	$ 7,995