Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Table of available-for-sale debt securities classified by maturity date (Details) - USD ($) $ in Millions	Jul. 31, 2023	Jul. 31, 2022
Amortized Cost
Due within one year	$ 735	$ 316
Due within two years	147	298
Due within three years	141	79
Due after three years	0	1
Total available-for-sale debt securities	1,023	694
Fair Value
Due within one year	730	313
Due within two years	144	293
Due within three years	140	78
Due after three years	0	1
Total available-for-sale debt securities	$ 1,014	$ 685