Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 201,313	$ 169,279
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax	8,853	(78,956)
Pension and other postretirement benefit liability adjustments, net of tax	3,164	4,272
Unrealized (loss) on securities, net of tax	(257)	(340)
Unrealized (loss) on derivatives, net of tax		(606)
Total other comprehensive income (loss)	11,760	(75,630)
Total Comprehensive Income	213,073	93,649
Less: Comprehensive Income Attributable to Noncontrolling Interests	245	204
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 212,828	$ 93,445