Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	May 31, 2024	Feb. 29, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 836,465	$ 1,164,270
Mutual fund investments	25,175	24,312
Total assets at fair value	$ 922,907	$ 1,247,407
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	3.40%	4.60%
Total liabilities at fair value	$ (1,019)	$ (2,302)
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	$ 836,465	$ 1,164,270
Mutual fund investments	25,175	24,312
Total assets at fair value	$ 861,640	$ 1,188,582
Percent of total assets at fair value	93.40%	95.30%
Percent of total assets	3.20%	4.40%
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	$ 61,267	$ 58,825
Percent of total assets at fair value	6.60%	4.70%
Percent of total assets	0.20%	0.20%
Total liabilities at fair value	$ (1,019)	$ (2,302)
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	$ 51,354	$ 45,761
Liabilities: Derivative instruments	(1,019)	(2,302)
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	0
Designated As Hedging Instrument | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	51,354	45,761
Liabilities: Derivative instruments	(1,019)	(2,302)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	9,913	13,064
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	$ 9,913	$ 13,064