Auto Loan Receivables (Past Due Receivables) (Details) (USD $) In Millions, unless otherwise specified	Nov. 30, 2013		Feb. 28, 2013
Financing Receivable, Past Due [Line Items]
Total ending managed receivables	$ 6,919.0	[1],[2]	$ 5,933.3	[1],[2]
31-60 days past due	138.9		109.5
61-90 days past due	46.0		32.7
Greater than 90 days past due	16.2		12.0
Total past due	$ 201.1		$ 154.2
Past due receivables as a percentage of total ending managed receivables	2.90%	[3]	2.60%	[3]
Managed Receivables [Member]
Financing Receivable, Past Due [Line Items]
Item as percent of total ending managed receivables	100.00%	[3]	100.00%	[3]
31-60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past due receivables as a percentage of total ending managed receivables	2.00%	[3]	1.80%	[3]
61-90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past due receivables as a percentage of total ending managed receivables	0.70%	[3]	0.60%	[3]
Greater Than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past due receivables as a percentage of total ending managed receivables	0.20%	[3]	0.20%	[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] (1)Percent of total ending managed receivables.