Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
May 31, 2014
May 31, 2013
Cancellation Reserves [Abstract]    
Balance as of beginning of year $ 72.5 $ 32.7
Cancellations (12.5) (8.5)
Provision for future cancellations 21.1 9.1
Balance as of end of year $ 81.1 $ 33.3