Auto Loan Receivables (Ending Managed Receivables By Major Credit Grade) (Details) (USD $) In Millions, unless otherwise specified	Nov. 30, 2013		Feb. 28, 2013
Financing Receivable, By Major Credit Grade [Line Items]
Total ending managed receivables	$ 6,919.0	[1],[2]	$ 5,933.3	[1],[2]
Total ending managed receivables as percentage by major credit grade	100.00%	[3]	100.00%	[3]
Credit Grade A [Member]
Financing Receivable, By Major Credit Grade [Line Items]
Total ending managed receivables	3,373.8	[2]	2,841.4	[2]
Total ending managed receivables as percentage by major credit grade	48.80%	[3]	47.90%	[3]
Credit Grade B [Member]
Financing Receivable, By Major Credit Grade [Line Items]
Total ending managed receivables	2,574.4	[2]	2,265.6	[2]
Total ending managed receivables as percentage by major credit grade	37.20%	[3]	38.20%	[3]
Credit Grade C And Other [Member]
Financing Receivable, By Major Credit Grade [Line Items]
Total ending managed receivables	$ 970.8	[2]	$ 826.3	[2]
Total ending managed receivables as percentage by major credit grade	14.00%	[3]	13.90%	[3]

[1] Other receivables includes receivables not funded through the warehouse facilities or term securitizations.

[2] Classified based on credit grade assigned when customers were initially approved for financing.

[3] Percent of total ending managed receivables.