Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Income Statement [Abstract]
Net Sales		$ 1,792,275	$ 1,791,708	$ 3,804,132	$ 3,724,028
Cost of Sales		1,044,047	1,101,317	2,227,287	2,289,166
Gross Profit		748,228	690,391	1,576,845	1,434,862
Selling, General and Administrative Expenses		523,289	490,607	1,054,321	975,812
Restructuring Expense		1,239	1,272	7,737	2,626
Interest Expense		30,348	27,918	62,166	54,629
Investment (Income), Net		(5,289)	(6,851)	(17,728)	(3,187)
Other Expense, Net		2,817	2,310	5,371	4,726
Income Before Income Taxes		195,824	175,135	464,978	400,256
Provision for Income Taxes		50,009	43,593	117,850	99,435
Net Income		145,815	131,542	347,128	300,821
Less: Net Income Attributable to Noncontrolling Interests		310	198	541	464
Net Income Attributable to RPM International Inc. Stockholders		$ 145,505	$ 131,344	$ 346,587	$ 300,357
Average Number of Shares of Common Stock Outstanding:
Basic		127,758	127,585	127,816	127,600
Diluted	[1]	128,249	128,911	128,312	128,887
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 1.13	$ 1.02	$ 2.7	$ 2.34
Diluted		$ 1.13	$ 1.02	$ 2.69	$ 2.33

[1] For the three and six months ended November 30, 2023, approximately 360,000 and 280,000 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 six months ended November 30, 2022, approximately 700,000 and 720,000 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.