Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classification on Balance Sheets (Details) - USD ($) $ in Millions	Apr. 30, 2023	Jul. 31, 2022	Apr. 30, 2022	Jul. 31, 2021
Amortized Cost
Cash and cash equivalents	$ 3,745	$ 2,796	$ 3,531
Investments	526	490
Funds receivable and amounts held for customers	391	435
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	4,662	3,721
Fair Value
Cash equivalents:	3,745	2,796
Investments	523	485
Total funds receivable and amounts held for customers	388	431	$ 539	$ 457
Total cash and cash equivalents, investments, and funds receivable and amounts held for customers	$ 4,656	$ 3,712