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Stock-Based Employee Compensation - Fair Value of Stock Options (Details) - Long-Term Stock Incentive Plan - USD ($) $ in Millions | 12 Months Ended
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Feb. 28, 2026 | Feb. 28, 2025 | Feb. 29, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Fair value of stock options vested | $ 19.0 | $ 23.6 | $ 27.3
Intrinsic value of stock options exercised | 2.4 | 34.6 | 54.6
Tax benefit realized from stock options exercised | $ 0.6 | $ 5.4 | $ 10.4

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