Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Nov. 30, 2023	Feb. 28, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 1,194,255	$ 865,943
Mutual fund investments	22,809	22,671
Total assets at fair value	$ 1,293,447	$ 1,019,812
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	4.80%	3.90%
Total liabilities at fair value	$ (6,208)	$ 0
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	$ 1,194,255	$ 865,943
Mutual fund investments	22,809	22,671
Total assets at fair value	$ 1,217,064	$ 888,614
Percent of total assets at fair value	94.10%	87.10%
Percent of total assets	4.50%	3.40%
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	$ 76,383	$ 131,198
Percent of total assets at fair value	5.90%	12.90%
Percent of total assets	0.30%	0.50%
Total liabilities at fair value	$ (6,208)	$ 0
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	$ 59,137	$ 97,328
Liabilities: Derivative instruments	(6,208)
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	59,137	97,328
Liabilities: Derivative instruments	(6,208)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	17,246	33,870
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	$ 17,246	$ 33,870