Summary of Significant Accounting Policies (Policies) - EBP 007 [Member] |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| EBP, Accounting Policy [Line Items] | |
| Basis of Presentation | Basis of Presentation The accompanying financial statements of the RPM International Inc. Union 401(k) Trust and Plan (the Plan) have been prepared on the accrual basis in conformity with accounting principles generally accepted in the United States of America. |
| Investment Valuation and Income Recognition | Investment Valuation and Income Recognition Investments are reported at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note C for discussion of fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded when received. Dividends are recorded on the
ex-dividend date. Net appreciation (depreciation) includes the Plan’s gains and losses on investments bought and sold as well as held during the Plan year. |
| Notes Receivable from Participant Accounts | Notes Receivable from Participant Accounts Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent participant loans are reclassified as distributions based upon the terms of the Plan document. |
| Contributions | Contributions Participant contributions and any related employer matching contributions are recognized in the period during which the Company makes the respective payroll deduction from the participant’s compensation. |
| Payment of Benefits | Payment of Benefits Benefits are recorded when paid. |
| Use of Estimates | Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and changes therein, and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. |