Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2022	May 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of beginning of period	$ 144.7	$ 124.5
Cancellations	(27.7)	(20.2)
Provision for future cancellations	31.7	34.1
Balance as of end of period	$ 148.7	$ 138.4