Auto Loan Receivables (Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2021	Mar. 01, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 507,201	$ 433,030		$ 411,100
Financing Receivable, Allowance for Credit Loss, Writeoff	(402,500)	(227,200)
Provision for loan losses	317,000	141,700	$ 160,700
Recoveries (2)	159,700	$ 107,400
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ 74,200
Allowance For Loan Losses
Financing Receivable, Allowance for Credit Loss [Line Items]
Item as percent of total ending managed receivables	3.02%	2.77%		2.97%
Core managed receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 401,500	$ 377,500		$ 379,400
Financing Receivable, Allowance for Credit Loss, Writeoff	(348,100)	(206,500)
Provision for loan losses	229,600	105,200
Recoveries (2)	142,500	99,400
Other managed receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	105,700	55,500		$ 31,700
Financing Receivable, Allowance for Credit Loss, Writeoff	(54,400)	(20,700)
Provision for loan losses	87,400	36,500
Recoveries (2)	$ 17,200	$ 8,000