XML 21 R9.htm IDEA: XBRL DOCUMENT
v3.20.2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares | 3 Months Ended
--- | ---
Aug. 31, 2020 | Aug. 31, 2019
Statement Of Stockholders Equity [Abstract] |  |
Dividends declared and paid per share | $ 0.36 | $ 0.35

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

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