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Cancellation Reserves (Tables)
 3 Months Ended
May 31, 2018
Cancellation Reserves [Abstract]  
Schedule Of Cancellation Reserves Accrual
Cancellation Reserves
 
Three Months Ended May 31
(In millions)
2018
 
2017
Balance as of beginning of period
$
105.2

 
$
108.2

Cancellations
(16.6
)
 
(16.3
)
Provision for future cancellations
20.1

 
17.1

Balance as of end of period
$
108.7

 
$
109.0