Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Income Statement [Abstract]
Net Sales		$ 1,845,318	$ 1,792,275	$ 3,814,107	$ 3,804,132
Cost of Sales		1,080,774	1,044,047	2,212,890	2,227,287
Gross Profit		764,544	748,228	1,601,217	1,576,845
Selling, General and Administrative Expenses		529,836	523,289	1,055,982	1,054,321
Restructuring Expense		7,557	1,239	14,759	7,737
Interest Expense		23,177	30,348	47,611	62,166
Investment (Income), Net		(8,526)	(5,289)	(19,552)	(17,728)
Other (Income) Expense, Net		(482)	2,817	(1,016)	5,371
Income Before Income Taxes		212,982	195,824	503,433	464,978
Provision for Income Taxes		29,532	50,009	91,429	117,850
Net Income		183,450	145,815	412,004	347,128
Less: Net Income Attributable to Noncontrolling Interests		246	310	1,108	541
Net Income Attributable to RPM International Inc. Stockholders		$ 183,204	$ 145,505	$ 410,896	$ 346,587
Average Number of Shares of Common Stock Outstanding:
Basic		127,658	127,758	127,675	127,816
Diluted	[1]	128,344	128,249	128,392	128,312
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 1.43	$ 1.13	$ 3.21	$ 2.70
Diluted		$ 1.42	$ 1.13	$ 3.19	$ 2.69

[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 six months ended November 30, 2024, approximately 300,000 and 230,000 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 six months ended November 30, 2023, approximately 360,000 and 280,000 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.