Stock And Stock-Based Incentive Plans (Assumptions Used To Estimate Option Values) (Details)	12 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 29, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
Dividend yield	0.00%	0.00%	0.00%
Expected volatility factor, Minimum	31.80%	36.10%	26.80%
Expected volatility factor, Maximum	37.60%	56.10%	32.60%
Weighted average expected volatility	36.20%	38.20%	29.20%
Risk-free interest rate, Minimum	0.00%	0.10%	1.50%
Risk-free interest rate, Maximum	1.40%	0.70%	2.40%
Expected term (in years)	4 years 7 months 6 days	4 years 7 months 6 days	4 years 7 months 6 days