Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classification on Balance Sheets (Details) - USD ($) $ in Millions	Jan. 31, 2024	Jul. 31, 2023	Jan. 31, 2023	Jul. 31, 2022
Amortized Cost
Cash and cash equivalents	$ 1,474	$ 2,848	$ 1,547
Investments	15	819
Funds receivable and amounts held for customers	3,391	424
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	4,880	4,091
Fair Value
Cash equivalents:	1,474	2,848
Investments	15	814
Total funds receivable and amounts held for customers	3,390	420	$ 376	$ 431
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	$ 4,879	$ 4,082