Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Feb. 28, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 698,000	$ 701,865
Mutual fund investments	23,809	24,022
Total assets at fair value	$ 826,335	$ 774,678
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	3.10%	2.90%
Total liabilities at fair value	$ 0	$ (1,379)
Percent of total liabilities	0.00%	0.00%
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 698,000	$ 701,865
Mutual fund investments	23,809	24,022
Total assets at fair value	$ 721,809	$ 725,887
Percent of total assets at fair value	87.40%	93.70%
Percent of total assets	2.70%	2.80%
Total liabilities at fair value	$ 0	$ 0
Percent of total liabilities	0.00%	0.00%
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 0	$ 0
Mutual fund investments	0	0
Total assets at fair value	$ 104,526	$ 48,791
Percent of total assets at fair value	12.60%	6.30%
Percent of total assets	0.40%	0.20%
Total liabilities at fair value	$ 0	$ (1,379)
Percent of total liabilities	0.00%	0.00%
Designated As Hedging Instrument
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 76,580	$ 39,452
Liabilities: Derivative instruments		(1,379)
Designated As Hedging Instrument | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Liabilities: Derivative instruments		0
Designated As Hedging Instrument | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	76,580	39,452
Liabilities: Derivative instruments		(1,379)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	27,946	9,339
Not Designated as Hedging Instrument [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Not Designated as Hedging Instrument [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 27,946	$ 9,339