Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Aug. 31, 2024	Aug. 31, 2023
Income Statement [Abstract]
Net Sales		$ 1,968,789	$ 2,011,857
Cost of Sales		1,132,116	1,183,240
Gross Profit		836,673	828,617
Selling, General and Administrative Expenses		526,146	531,032
Restructuring Expense		7,202	6,498
Interest Expense		24,434	31,818
Investment (Income), Net		(11,026)	(12,439)
Other (Income) Expense, Net		(534)	2,554
Income Before Income Taxes		290,451	269,154
Provision for Income Taxes		61,897	67,841
Net Income		228,554	201,313
Less: Net Income Attributable to Noncontrolling Interests		862	231
Net Income Attributable to RPM International Inc. Stockholders		$ 227,692	$ 201,082
Average Number of Shares of Common Stock Outstanding:
Basic		127,691	127,633
Diluted	[1]	128,420	128,771
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 1.78	$ 1.57
Diluted		$ 1.77	$ 1.56

[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 months ended August 31, 2024 and 2023, approximately 180,000 and 1,037,000 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.