Notes Receivable and Allowances for Loan Losses (Details) - USD ($) $ in Millions	Jan. 31, 2023	Jul. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, net	$ 999	$ 540
Period past due considered delinquent	1 day
Small Business Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, net	$ 699	540
Refund Advance Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, net	$ 300	$ 0