Auto Loan Receivables (Allowance For Loan Losses) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 31, 2014
May 31, 2013
May 31, 2014
Allowance For Loan Losses [Member]
Feb. 28, 2014
Allowance For Loan Losses [Member]
May 31, 2013
Allowance For Loan Losses [Member]
Feb. 28, 2013
Allowance For Loan Losses [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]            
Balance as of beginning of year $ 69.9 $ 57.3        
Charge-offs (32.0) (26.4)        
Recoveries 21.7 18.7        
Provision for loan losses (15.8) (11.3)        
Balance as of end of year $ 75.4 $ 60.9        
Item as percent of total ending managed receivables     1.00% [1] 0.97% [1] 0.96% [1] 0.97% [1]
[1] (1)Percentage of total ending managed receivables as of the corresponding reporting date.