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Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($)
$ in Millions
12 Months Ended
Feb. 28, 2021
Feb. 29, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]    
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount $ 117.9 $ 102.8
Cancellations (65.6) (74.2)
Provision for future cancellations 72.2 89.3
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount $ 124.5 $ 117.9