Auto Loan Receivables (Allowance For Loan Losses) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 28, 2014		Feb. 28, 2013		Feb. 29, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance as of beginning of year	$ 57.3		$ 43.3
Charge-offs	(134.3)		(103.1)
Recoveries	74.7		60.9
Provision for loan losses	(72.2)		(56.2)		(36.4)
Balance as of end of year	$ 69.9		$ 57.3		$ 43.3
Allowance For Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Item as percent of total ending managed receivables	0.97%	[1]	0.97%	[1]	0.87%	[1]

[1] Percent of total ending managed receivables as of the corresponding reporting date.