Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 52,314	$ 61,478	$ 464,318	$ 408,606
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments, net of tax	(19,666)	(7,591)	(65,779)	1,218
Pension and other postretirement benefit liability adjustments, net of tax	2,009	3,356	4,067	9,966
Unrealized gain on securities, net of tax	123	197	709	34
Total other comprehensive (loss) income	(17,534)	(4,038)	(61,003)	11,218
Total Comprehensive Income	34,780	57,440	403,315	419,824
Less: Comprehensive Income Attributable to Noncontrolling Interests	273	280	1,385	832
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 34,507	$ 57,160	$ 401,930	$ 418,992