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Cancellation Reserves (Tables)
 6 Months Ended
Aug. 31, 2017
Cancellation Reserves [Abstract]  
Schedule Of Cancellation Reserves Accrual
Cancellation Reserves
 
Three Months Ended August 31
Six Months Ended August 31
(In millions)
2017
 
2016
2017
 
2016
Balance as of beginning of period
$
109.0

 
$
112.5

$
108.2

 
$
110.2

Cancellations
(16.6
)
 
(16.4
)
(32.9
)
 
(32.8
)
Provision for future cancellations
17.4

 
17.2

34.5

 
35.9

Balance as of end of period
$
109.8

 
$
113.3

$
109.8

 
$
113.3