Contingent Liabilities, Commitments and Legal Matters (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 30, 2022	Apr. 30, 2022	Jul. 31, 2021
Loss Contingencies [Line Items]
Standby repurchase obligations amount	$ 4,215,062	$ 4,215,062	$ 1,821,012
Term of commitments		18 months
Repurchase and guarantee reserve balances	11,317	$ 11,317	$ 6,023
Selling, General and Administrative Expenses
Loss Contingencies [Line Items]
Expenses recorded related to product recall costs	$ 0	$ 32,125