Summary Of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Feb. 28, 2022 USD ($) warehouse	Feb. 28, 2021 USD ($)	Feb. 29, 2020 USD ($)
Liquid investments, maturity period	three months or less
Restricted cash from collections on auto loans receivable	$ 548,099,000	$ 496,415,000	$ 481,043,000
Number of warehouses | warehouse	3
Restricted Cash and Cash Equivalents, Noncurrent	$ 152,803,000	143,213,000	117,136,000
Other investments	108,500,000	152,900,000
Accrued compensation and benefits	267,000,000	223,100,000
General liability and workers' compensation insurance	44,000,000	42,900,000
Revenue Recognition, Sales Returns, Reserve for Sales Returns	79,800,000	33,900,000
Advertising expenses	332,200,000	218,600,000	$ 191,800,000
Cash, Cash Equivalents, and Short-term Investments	0	46,900,000
Asset-backed term funding transactions
Restricted Cash and Cash Equivalents, Noncurrent	$ 105,800,000	$ 97,200,000
Financing Obligations
Estimated useful life average, years	25 years