Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Nov. 30, 2024	Feb. 29, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 871,146	$ 1,164,270
Mutual fund investments	28,077	24,312
Total assets at fair value	$ 923,755	$ 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	$ (6,349)	$ (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	$ 871,146	$ 1,164,270
Mutual fund investments	28,077	24,312
Total assets at fair value	$ 899,223	$ 1,188,582
Percent of total assets at fair value	97.30%	95.30%
Percent of total assets	3.30%	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	$ 24,532	$ 58,825
Percent of total assets at fair value	2.70%	4.70%
Percent of total assets	0.10%	0.20%
Total liabilities at fair value	$ (6,349)	$ (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	$ 21,347	$ 45,761
Liabilities: Derivative instruments	(6,346)	(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	21,347	45,761
Liabilities: Derivative instruments	(6,346)	(2,302)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	3,185	13,064
Liabilities: Derivative instruments	(3)
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
Liabilities: Derivative instruments	0
Not Designated as Hedging Instrument [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	3,185	$ 13,064
Liabilities: Derivative instruments	$ (3)