Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Income Statement [Abstract]
Net Sales		$ 1,516,176	$ 1,433,879	$ 5,240,204	$ 4,723,838
Cost of Sales		978,142	935,293	3,267,308	3,029,287
Gross Profit		538,034	498,586	1,972,896	1,694,551
Selling, General and Administrative Expenses		450,019	433,569	1,425,969	1,290,245
Restructuring Expense		4,154	1,140	6,780	5,128
Goodwill Impairment		36,745		36,745
Interest Expense		30,756	22,016	85,385	64,127
Investment (Income) Expense, Net		(2,723)	4,355	(5,910)	1,421
(Gain) on Sales of Assets and Business, Net		(25,743)	(249)	(25,881)	(42,491)
Other Expense (Income), Net		2,339	(2,742)	7,065	(9,001)
Income Before Income Taxes		42,487	40,497	442,743	385,122
Provision for Income Taxes		15,248	7,248	114,683	91,962
Net Income		27,239	33,249	328,060	293,160
Less: Net Income Attributable to Noncontrolling Interests		265	230	729	684
Net Income Attributable to RPM International Inc. Stockholders		$ 26,974	$ 33,019	$ 327,331	$ 292,476
Average Number of Shares of Common Stock Outstanding:
Basic		127,495	127,943	127,564	128,013
Diluted	[1]	128,035	129,702	128,789	129,622
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 0.21	$ 0.26	$ 2.55	$ 2.27
Diluted		$ 0.21	$ 0.25	$ 2.54	$ 2.26

[1] 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. For the three and nine months ended February 28, 2022, approximately 320,000 and 655,000 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.