Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Income Statement [Abstract]
Net Sales		$ 1,522,982	$ 1,516,176	$ 5,327,114	$ 5,240,204
Cost of Sales		915,818	978,142	3,143,105	3,267,308
Gross Profit		607,164	538,034	2,184,009	1,972,896
Selling, General and Administrative Expenses		504,760	450,019	1,559,081	1,425,969
Restructuring Expense		6,359	4,154	14,096	6,780
Goodwill Impairment		0	36,745	0	36,745
Interest Expense		28,527	30,756	90,693	85,385
Investment (Income), Net		(18,665)	(2,723)	(36,393)	(5,910)
(Gain) on Sales of Assets and Business, Net		0	(25,743)	0	(25,881)
Other Expense, Net		2,602	2,339	7,973	7,065
Income Before Income Taxes		83,581	42,487	548,559	442,743
Provision for Income Taxes		22,103	15,248	139,953	114,683
Net Income		61,478	27,239	408,606	328,060
Less: Net Income Attributable to Noncontrolling Interests		279	265	820	729
Net Income Attributable to RPM International Inc. Stockholders		$ 61,199	$ 26,974	$ 407,786	$ 327,331
Average Number of Shares of Common Stock Outstanding:
Basic		127,781	127,495	127,803	127,564
Diluted	[1]	128,334	128,035	128,315	128,789
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 0.48	$ 0.21	$ 3.18	$ 2.55
Diluted		$ 0.47	$ 0.21	$ 3.16	$ 2.54

[1] For the three and nine months ended February 29, 2024, approximately 300,000 and 250,000 shares of stock 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 28, 2023, approximately 680,000 shares of stock granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.