Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Classified by the Stated Maturity Date (Details) - USD ($) $ in Millions	Jan. 31, 2024	Jul. 31, 2023
Amortized Cost
Due within one year	$ 84	$ 735
Due within two years	68	147
Due within three years	22	141
Due after three years	0	0
Total available-for-sale debt securities	174	1,023
Fair Value
Due within one year	83	730
Due within two years	68	144
Due within three years	22	140
Due after three years	0	0
Total available-for-sale debt securities	$ 173	$ 1,014