Contingent Liabilities, Commitments and Legal Matters (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jul. 31, 2022
Loss Contingencies [Line Items]
Standby repurchase obligations amount	$ 4,646,159		$ 4,646,159		$ 4,308,524
Term of commitments			18 months
Repurchase and guarantee reserve balances	12,840		$ 12,840		$ 11,346
Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Expense recorded related to product recall costs	$ 0	$ 13,000	$ 0	$ 35,000