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Capital Stock and Changes in Capital Accounts - Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended |
--- | --- | ---
Jul. 31, 2025 | Jul. 31, 2024 | Apr. 30, 2020
Share Repurchase Program In 2020 |  |  |
Capital Stock [Abstract] |  |  |
Share Repurchase Program, Authorized, Amount | $ 250.0 |  | $ 200.0
Remaining amount authorized to be repurchased under the share repurchase program |  |  | $ 43.4
Class A common stock |  |  |
Share Repurchases [Abstract] |  |  |
Shares repurchased (in shares) | 331 | 295 |
Treasury stock acquired (in dollars per share) | $ 42.22 | $ 42.34 |
Class B common stock |  |  |
Share Repurchases [Abstract] |  |  |
Shares repurchased (in shares) | 1 | 0 |
Treasury stock acquired (in dollars per share) | $ 42.22 | $ 42.34 |

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481549/505-30-45-1 + Details
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