v2.4.0.6
Auto Loan Receivables (Past Due Receivables) (Details) (USD $)
In Millions, unless otherwise specified
 9 Months Ended 12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Feb. 29, 2012
Feb. 28, 2011
Financing Receivable, Past Due [Line Items]        
Total ending managed receivables $ 5,583.4 [1] $ 4,823.8 [1] $ 4,981.8 [1] $ 4,334.6 [1]
31-60 days past due 118.4 103.3 85.1 86.6
61-90 days past due 35.0 28.4 21.8 24.2
Greater than 90 days past due 11.5 10.6 9.6 10.5
Total past due $ 164.9 $ 142.3 $ 116.5 $ 121.3
Past due receivables as a percentage of total ending managed receivables 3.00% [2] 3.00% [2] 2.30% [2] 2.80% [2]
31-60 Days Past Due [Member]
        
Financing Receivable, Past Due [Line Items]        
Past due receivables as a percentage of total ending managed receivables 2.20% [2] 2.20% [2] 1.70% [2] 2.00% [2]
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% [2] 0.60% [2] 0.40% [2] 0.60% [2]
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% [2] 0.20% [2] 0.20% [2] 0.20% [2]
Managed Receivables [Member]
        
Financing Receivable, Past Due [Line Items]        
Item as percent of total ending managed receivables 100.00% [2] 100.00% [2] 100.00% [2] 100.00% [2]
[1] Classified based on credit grade assigned when customers were initially approved for financing.
[2] Percent of total ending managed receivables.