Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($) $ in Millions	3 Months Ended
	May 31, 2021	May 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of beginning of period	$ 124.5	$ 117.9
Cancellations	(20.2)	(14.8)
Provision for future cancellations	34.1	13.6
Balance as of end of period	$ 138.4	$ 116.7