Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of beginning of period	$ 144.3	$ 122.6	$ 124.5	$ 117.9
Cancellations	(25.2)	(17.4)	(68.3)	(48.3)
Provision for future cancellations	28.7	17.9	91.6	53.5
Balance as of end of period	$ 147.8	$ 123.1	$ 147.8	$ 123.1