Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Income Statement [Abstract]
Net Sales		$ 1,791,708	$ 1,639,538	$ 3,724,028	$ 3,289,959
Cost of Sales		1,101,317	1,056,924	2,289,166	2,093,994
Gross Profit		690,391	582,614	1,434,862	1,195,965
Selling, General and Administrative Expenses		490,607	437,709	975,812	856,676
Restructuring Expense		1,272	2,977	2,626	3,988
Interest Expense		27,918	21,002	54,629	42,111
Investment (Income) Expense, Net		(6,851)	2,816	(3,187)	(2,934)
(Gain) on Sales of Assets, Net			(42,124)		(42,242)
Other Expense (Income), Net		2,310	(2,920)	4,726	(6,259)
Income Before Income Taxes		175,135	163,154	400,256	344,625
Provision for Income Taxes		43,593	38,038	99,435	84,714
Net Income		131,542	125,116	300,821	259,911
Less: Net Income Attributable to Noncontrolling Interests		198	241	464	454
Net Income Attributable to RPM International Inc. Stockholders		$ 131,344	$ 124,875	$ 300,357	$ 259,457
Average Number of Shares of Common Stock Outstanding:
Basic		127,585	128,022	127,600	128,058
Diluted	[1]	128,911	128,494	128,887	128,537
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 1.02	$ 0.97	$ 2.34	$ 2.01
Diluted		$ 1.02	$ 0.96	$ 2.33	$ 2.00

[1] For the three months ended November 30, 2022 and 2021, approximately 700,000 and 660,000 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 six months ended November 30, 2022 and 2021, approximately 720,000 and 660,000 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.