Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classification on Balance Sheets (Details) - USD ($) $ in Millions	Oct. 31, 2023	Jul. 31, 2023	Oct. 31, 2022	Jul. 31, 2022
Amortized Cost
Cash and cash equivalents	$ 1,734	$ 2,848	$ 2,125
Investments	541	819
Funds receivable and amounts held for customers	2,529	424
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	4,804	4,091
Fair Value
Cash equivalents:	1,734	2,848
Investments	537	814
Total funds receivable and amounts held for customers	2,525	420	$ 468	$ 431
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	$ 4,796	$ 4,082