Cancellation Reserves (Schedule Of Cancellation Reserves Accrual) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance as of beginning of period	$ 138.7	$ 148.7	$ 139.2	$ 144.7
Cancellations	(23.2)	(27.4)	(47.8)	(55.1)
Provision for future cancellations	21.1	27.5	45.2	59.2
Balance as of end of period	$ 136.6	$ 148.8	$ 136.6	$ 148.8