Annual report pursuant to Section 13 and 15(d)

Stock-Based Employee Compensation - Summary of Restricted Stock and Performance Share Activity and Fair Value (Details)

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Stock-Based Employee Compensation - Summary of Restricted Stock and Performance Share Activity and Fair Value (Details) - Long-Term Stock Incentive Plan - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Feb. 29, 2024
Feb. 28, 2023
Feb. 28, 2022
Restricted Stock Units      
Number      
Balance at beginning of period (in shares) 291,859 291,171 311,358
Granted (in shares) 192,300 128,743 113,686
Vested (in shares) (116,937) (113,541) (107,626)
Forfeited (in shares) (31,608) (14,514) (26,247)
Balance at end of period (in shares) 335,614 291,859 291,171
Weighted Average Grant-Date Fair Value      
Balance at beginning of period (in dollars per share) $ 223.75 $ 202.68 $ 183.74
Granted (in dollars per share) 227.30 252.53 236.19
Vested (in dollars per share) 213.83 202.64 184.81
Forfeited (in dollars per share) 228.90 221.33 196.41
Balance at end of period (in dollars per share) $ 228.75 $ 223.75 $ 202.68
Fair value of shares vested $ 27.0 $ 27.9 $ 25.8
Performance Share Units      
Number      
Balance at beginning of period (in shares) 85,649 86,641 226,463
Granted (in shares) 67,734 32,976 27,029
Performance achievement (in shares) (10,725) (7,415) (148,495)
Vested (in shares) (21,848) (21,245) (12,499)
Forfeited (in shares) (10,749) (5,308) (5,857)
Balance at end of period (in shares) 110,061 85,649 86,641
Weighted Average Grant-Date Fair Value      
Balance at beginning of period (in dollars per share) $ 302.06 $ 268.12 $ 223.85
Granted (in dollars per share) 238.01 395.55 318.71
Performance achievement (in dollars per share) 202.53 316.81 210.36
Vested (in dollars per share) 202.53 298.25 279.67
Forfeited (in dollars per share) 295.07 323.44 229.81
Balance at end of period (in dollars per share) $ 292.78 $ 302.06 $ 268.12
Fair value of shares vested $ 5.0 $ 5.2 $ 3.0