Fair Value Measurements (Schedule Of Items Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Nov. 30, 2022	Feb. 28, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market securities	$ 1,261,183	$ 701,865
Mutual fund investments	21,485	24,022
Total assets at fair value	$ 1,405,076	$ 774,678
Percent of total assets at fair value	100.00%	100.00%
Percent of total assets	5.40%	2.90%
Total liabilities at fair value	$ (3,599)	$ (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	$ 1,261,183	$ 701,865
Mutual fund investments	21,485	24,022
Total assets at fair value	$ 1,282,668	$ 725,887
Percent of total assets at fair value	91.30%	93.70%
Percent of total assets	4.90%	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	$ 122,408	$ 48,791
Percent of total assets at fair value	8.70%	6.30%
Percent of total assets	0.50%	0.20%
Total liabilities at fair value	$ (3,599)	$ (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	$ 89,485	$ 39,452
Liabilities: Derivative instruments	(3,599)	(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	0
Designated As Hedging Instrument | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	89,485	39,452
Liabilities: Derivative instruments	(3,599)	(1,379)
Not Designated as Hedging Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	32,923	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	$ 32,923	$ 9,339