Auto Loan Receivables (Past Due Receivables) (Details) (USD $)
In Millions, unless otherwise specified
May 31, 2014
Feb. 28, 2014
Financing Receivable, Past Due [Line Items]    
Total ending managed receivables $ 7,573.8 [1],[2] $ 7,184.4 [1],[2]
31-60 days past due 133.5 126.6
61-90 days past due 42.4 42.6
Greater than 90 days past due 14.2 16.0
Total past due $ 190.1 $ 185.2
Past due receivables as a percentage of total ending managed receivables 2.50% [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 1.70% [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 0.60% [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)Percentage of total ending managed receivables.