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Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Aug. 31, 2024
Aug. 31, 2023
Aug. 31, 2024
Aug. 31, 2023
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]        
Balance as of beginning of period $ 131.3 $ 138.7 $ 128.3 $ 139.2
Cancellations (22.6) (23.2) (43.9) (47.8)
Provision for future cancellations 25.0 21.1 49.3 45.2
Balance as of end of period $ 133.7 $ 136.6 $ 133.7 $ 136.6