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Stock-Based Employee Compensation - Weighted Average Grant-Date Fair Value of Stock Options (Details) - Long-Term Stock Incentive Plan - Stock options - $ / shares
12 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Weighted average assumptions to estimate fair value of equity instruments using Black-Scholes option-pricing model    
Grant-date fair value (in dollars per share) $ 78.32 $ 64.75
Expected life 5 years 9 months 18 days 5 years 9 months 18 days
Expected volatility 27.80% 28.80%
Risk-free interest rate 4.70% 3.60%
Expected dividend yield 1.60% 1.60%