Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation - Weighted Average Grant-Date Fair Value of Performance Share Units (Details)

v3.21.1
Stock-Based Employee Compensation - Weighted Average Grant-Date Fair Value of Performance Share Units (Details) - Long-Term Stock Incentive Plan - $ / shares
12 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2019
Performance share units      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Grant-date fair value (in dollars per share) $ 202.53 $ 253.72 $ 222.92
Performance Share Units, Market Condition      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Grant-date fair value (in dollars per share) 202.53 319.56 322.42
Grant-date price (in dollars per share) $ 153.02 $ 205.46 $ 228.26
Performance period 2 years 10 months 24 days 2 years 9 months 18 days 2 years 10 months 24 days
Expected volatility 31.70% 23.10% 20.70%
Risk-free interest rate 0.20% 2.30% 2.60%
Expected dividend yield 0.00% 0.00% 0.00%