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Description of the Business, Basis of Presentation and Summary of Significant Accounting Policies - Stock-based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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May 31, 2026 | May 31, 2025 | May 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Estimated fair value of stock options granted (in Dollars) | $ 6.91 | $ 11.92 | $ 11.53
Assumptions: |  |  |
Expected dividend yield (percent) | 3.70% | 2.20% | 2.20%
Expected stock price volatility (percent) | 43.90% | 38.80% | 37.40%
Risk-free interest rate (percent) | 3.90% | 4.30% | 4.70%
Expected life of options (in years) | 6 years | 5 years | 4 years
Allowance for doubtful accounts receivable | $ 11.0 | $ 11.0 |

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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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