Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation (Details 2)

v3.20.1
Stock-Based Employee Compensation (Details 2) - Long-Term Stock Incentive Plan [Member] - Stock options [Member] - $ / shares
12 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Weighted average assumptions to estimate fair value of equity instruments using Black-Scholes option-pricing model      
Grant-date fair value $ 44.90 $ 53.06 $ 42.88
Expected life 6 years 5 years 10 months 24 days 5 years 10 months 24 days
Expected volatility 22.10% 22.30% 26.00%
Risk-free interest rate 2.50% 2.90% 2.00%
Expected dividend yield 1.50% 1.30% 1.20%