Auto Loan Receivables (Auto Loan Receivables, Net) (Details) - USD ($) $ in Thousands	May 31, 2023	Feb. 28, 2023	May 31, 2022	Feb. 28, 2022
Statement [Line Items]
Non-recourse Notes Payable	$ 16,779,798	$ 16,360,092
Financing Receivable, before Allowance for Credit Loss	17,190,600	16,767,900
Interest Receivable	93,100	78,000
Other	(3,400)	3,100
Financing Receivable, Allowance for Credit Loss	535,412	507,201	$ 458,200	$ 433,000
Financing Receivable, after Allowance for Credit Loss	16,744,865	16,341,791
Asset-backed term funding
Statement [Line Items]
Financing Receivable, before Allowance for Credit Loss	12,036,800	12,242,800
Warehouse facilities
Statement [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,241,600	3,649,900
Overcollateralization
Statement [Line Items]
Financing Receivable, before Allowance for Credit Loss	757,200	739,900
Other managed receivables
Statement [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 155,000	$ 135,300