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v3.25.2

Summary of Significant Accounting Policies - Treasury Stock (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
May 31, 2025 | May 31, 2024 | May 31, 2023
Treasury Stocks |  |  |
Repurchase of shares | $ 10.1 | $ 5.1 | $ 50.1
Shares repurchased (in shares) | 0.2 |  |
Restricted stock activity | $ 6.4 | 10.2 | 8.9
Re-issuance of treasury stock upon exercise of stock options, net of shares withheld to satisfy statutory tax obligations | $ 9.8 | $ 24.6 | $ 19.5
Federal statutory income tax rate (as a percent) | 21.00% | 21.00% | 21.00%
Treasury Stock |  |  |
Treasury Stocks |  |  |
Total increase (decrease) in treasury stock | $ 5.2 | $ (20.3) | $ 28.7
Repurchase of shares | 10.1 | $ 5.1 | $ 50.1
Shares repurchased (in shares) |  | 0.1 | 1.2
Restricted stock activity | (1.7) | $ 3.7 | $ 2.2
Re-issuance of treasury stock upon exercise of stock options, net of shares withheld to satisfy statutory tax obligations | $ 6.6 | $ 21.7 | $ 19.2

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