Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of beginning of period	$ 148.8	$ 144.3	$ 144.7	$ 124.5
Cancellations	(25.2)	(25.2)	(80.3)	(68.3)
Provision for future cancellations	20.7	28.7	79.9	91.6
Balance as of end of period	$ 144.3	$ 147.8	$ 144.3	$ 147.8