Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Income Statement [Abstract]
Net Sales		$ 1,476,562	$ 1,522,982	$ 5,290,669	$ 5,327,114
Cost of Sales		909,072	915,818	3,121,962	3,143,105
Gross Profit		567,490	607,164	2,168,707	2,184,009
Selling, General and Administrative Expenses		501,710	504,760	1,557,692	1,559,081
Restructuring Expense		3,456	6,359	18,215	14,096
Interest Expense		22,993	28,527	70,604	90,693
Investment (Income), Net		(1,266)	(18,665)	(20,818)	(36,393)
Other (Income) Expense, Net		(354)	2,602	(1,370)	7,973
Income Before Income Taxes		40,951	83,581	544,384	548,559
(Benefit) Provision for Income Taxes		(11,363)	22,103	80,066	139,953
Net Income		52,314	61,478	464,318	408,606
Less: Net Income Attributable to Noncontrolling Interests		280	279	1,388	820
Net Income Attributable to RPM International Inc. Stockholders		$ 52,034	$ 61,199	$ 462,930	$ 407,786
Average Number of Shares of Common Stock Outstanding:
Basic		127,536	127,781	127,628	127,803
Diluted	[1]	128,154	128,334	128,315	128,315
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 0.41	$ 0.48	$ 3.61	$ 3.18
Diluted		$ 0.4	$ 0.47	$ 3.59	$ 3.16

[1] The dilutive effect of performance-based restricted stock units is included when they have met minimum performance thresholds. The dilutive effect of SARs includes all outstanding awards except awards that are considered antidilutive. SARs are antidilutive when the exercise price exceeds the average market price of the Company’s common shares during the periods presented. For the three and nine months ended February 28, 2025, approximately 190,000 and 170,000 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive. For the three and nine months ended February 29, 2024, approximately 300,000 and 250,000 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.