Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classified by the Stated Maturity Date (Details) - USD ($) $ in Millions	Oct. 31, 2023	Jul. 31, 2023
Amortized Cost
Due within one year	$ 474	$ 735
Due within two years	144	147
Due within three years	108	141
Due after three years	0	0
Total available-for-sale debt securities	726	1,023
Fair Value
Due within one year	471	730
Due within two years	142	144
Due within three years	105	140
Due after three years	0	0
Total available-for-sale debt securities	$ 718	$ 1,014