| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 5/31/2025 | 5/31/2024 | 5/31/2023 | 5/31/2022 | 5/31/2021 | 5/31/2020 | 5/31/2019 | 5/31/2018 | 5/31/2017 | 5/31/2016 |
| Net Sales | 7,372.64 | 7,335.28 | 7,256.41 | 6,707.73 | 6,106.29 | 5,506.99 | 5,564.55 | 5,321.64 | 4,958.18 | 4,813.65 |
| Total Revenues | 7,372.64 | 7,335.28 | 7,256.41 | 6,707.73 | 6,106.29 | 5,506.99 | 5,564.55 | 5,321.64 | 4,958.18 | 4,813.65 |
| Cost of sales | 4,322.17 | 4,320.69 | 4,508.37 | 4,274.68 | 3,701.13 | 3,414.14 | 3,302.64 | 3,140.43 | 2,792.49 | 2,726.60 |
| Gross Profit | 3,050.48 | 3,014.59 | 2,748.04 | 2,433.05 | 2,405.16 | 2,092.86 | 2,261.91 | 2,181.21 | 2,165.69 | 2,087.05 |
| Goodwill and other intangible asset impairments | 11.35 | -- | 36.75 | -- | -- | -- | 4.19 | -- | 193.20 | -- |
| Selling, general and administrative expenses | 2,150.54 | 2,113.59 | 1,956.04 | 1,788.28 | 1,664.03 | 1,548.65 | 1,769.63 | 1,663.14 | 1,643.52 | 1,520.98 |
| Asbestos Charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest expense, net | 96.54 | 117.97 | 119.02 | 87.93 | 85.40 | 101.00 | 102.39 | 104.55 | 96.95 | 91.68 |
| Restructuring and asset impairment charge | 24.98 | 30.01 | 15.47 | 6.28 | 18.11 | 33.11 | 42.31 | 17.51 | -- | -- |
| (Gain) on Sales of Assets, Net | -- | -- | 28.63 | 51.98 | -- | -- | -- | -- | -- | -- |
| Investment (Expense) Income | 24.10 | 44.97 | 9.75 | (7.60) | 44.45 | 9.74 | 0.73 | 20.44 | 13.98 | 10.37 |
| Other income (expense) net | 1.59 | (10.16) | (9.78) | 11.85 | (13.64) | (12.07) | (4.27) | 0.60 | (1.67) | (1.29) |
| Estimated loss contingency | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income (loss) before income taxes | 792.76 | 787.84 | 649.38 | 606.80 | 668.44 | 407.76 | 339.85 | 417.05 | 244.33 | 483.47 |
| Pre-Tax Income - Foreign | 147.36 | 162.67 | 91.98 | 263.97 | 205.97 | 90.47 | 124.64 | 188.07 | 110.98 | 172.77 |
| Pre-Tax Income: United States | 645.40 | 625.17 | 557.40 | 342.83 | 462.47 | 317.29 | 215.20 | 228.98 | 133.36 | 310.70 |
| Current- U.S. Federal | 113.89 | 109.87 | 91.75 | 60.82 | 60.67 | 65.20 | 20.39 | 27.21 | 3.02 | 75.20 |
| Current- Foreign | 49.17 | 62.17 | 45.69 | 59.09 | 65.13 | 31.89 | 37.71 | 52.66 | 27.47 | 35.18 |
| Provision (benefit) for income taxes | 102.43 | 198.40 | 169.65 | 114.33 | 164.94 | 102.68 | 72.16 | 77.79 | 59.66 | 126.01 |
| Deferred: Foreign | (130.32) | (3.99) | (15.09) | (3.53) | (3.72) | 10.09 | (11.28) | (7.47) | 6.57 | (10.13) |
| Deferred- U.S. Federal | 25.66 | (2.26) | 16.97 | (24.03) | 20.03 | (19.21) | 15.30 | (8.05) | 15.55 | 17.63 |
| Current: State and local | 43.88 | 32.00 | 25.97 | 19.50 | 18.96 | 17.74 | 8.62 | 8.62 | 5.12 | 6.23 |
| Deferred: State and Local | 0.16 | 0.62 | 4.36 | 2.49 | 3.88 | (3.03) | 1.41 | 4.83 | 1.93 | 1.91 |
| Consolidated Net Income (Loss) | 690.33 | 589.44 | 479.73 | 492.47 | 503.50 | 305.08 | 267.69 | 339.26 | 184.67 | 357.46 |
| Less- Net income attributable to noncontrolling interests | 1.64 | 1.05 | 1.04 | 0.99 | 0.86 | 0.70 | 1.13 | 1.49 | 2.85 | 2.73 |
| Net income attributable to RPM International Inc. stockholders | 688.69 | 588.40 | 478.69 | 491.48 | 502.64 | 304.39 | 266.56 | 337.77 | -- | -- |
| Less: Allocation of earnings and dividends to participating securities | 2.63 | 2.63 | 2.16 | 3.92 | 4.02 | 1.96 | 1.51 | 3.86 | 2.80 | 5.77 |
| Net Income (Loss) Available to Common Shareholders | 686.06 | 585.77 | 476.54 | 487.56 | 498.63 | 302.43 | 265.04 | 333.91 | 179.03 | 348.96 |
| Net income available to common shareholders for diluted computation | 686.07 | 585.78 | 478.69 | 491.48 | 498.64 | 304.39 | 270.21 | 343.44 | 184.49 | 360.16 |
| Net Earnings Per Share (Basic) | 5.38 | 4.58 | 3.74 | 3.81 | 3.89 | 2.35 | 2.03 | 2.55 | 1.37 | 2.70 |
| Net Earnings Per Share (Diluted) | 5.35 | 4.56 | 3.72 | 3.79 | 3.87 | 2.34 | 2.01 | 2.50 | 1.36 | 2.63 |
| Weighted Average Shares Outstanding (Basic) | 127.57 | 127.77 | 127.51 | 127.95 | 128.33 | 128.47 | 130.55 | 131.18 | 130.66 | 129.38 |
| Weighted Average Shares Outstanding (Diluted) | 128.20 | 128.34 | 128.82 | 129.58 | 128.93 | 129.97 | 134.33 | 137.17 | 135.17 | 136.72 |