Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Net Income (Loss)	$ 16,911	$ (42,192)	$ 192,214	$ 41,762
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(12,146)	(19,938)	(1,355)	17,256
Pension and other postretirement benefit liability adjustments (net of tax of $1,993; $2,819; $4,751 and $5,498, respectively)	3,826	5,278	8,961	9,862
Unrealized gain (loss) on securities (net of tax of $(998); $220; $961 and $1,527, respectively)	(2,314)	(712)	2,648	1,012
Unrealized gain (loss) on derivatives (net of tax benefit of $(159); $157; $(437) and $(11), respectively)	(484)	328	(1,369)	(229)
Total Other Comprehensive (Loss) Income	(11,118)	(15,044)	8,885	27,901
Total Comprehensive Income (Loss)	5,793	(57,236)	201,099	69,663
Less: Comprehensive Income Attributable to Noncontrolling Interests	7,241	1,173	24,375	20,436
Comprehensive (Loss) Income Attributable to RPM International Inc. Stockholders	$ (1,448)	$ (58,409)	$ 176,724	$ 49,227