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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended
--- | ---
Aug. 31, 2024 | Aug. 31, 2023
Statement of Stockholders' Equity [Abstract] |  |
Dividends declared and paid per share | $ 0.46 | $ 0.42

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- Definition Common stock dividends declared and paid per share. + References No definition available. + Details
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Namespace Prefix: | rpm_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration