Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classified by the Stated Maturity Date (Details) - USD ($) $ in Millions	Apr. 30, 2023	Jul. 31, 2022
Amortized Cost
Due within one year	$ 406	$ 316
Due within two years	167	298
Due within three years	156	79
Due after three years	0	1
Total available-for-sale debt securities	729	694
Fair Value
Due within one year	402	313
Due within two years	165	293
Due within three years	156	78
Due after three years	0	1
Total available-for-sale debt securities	$ 723	$ 685