Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Net income	$ 68,414	$ 46,087	$ 175,303	$ 83,954
Other comprehensive income, net of tax:
Foreign currency translation adjustments	24,205	(2,036)	10,791	37,194
Pension and other postretirement benefit liability adjustments (net of tax of $1,379; $1,885; $2,811 and $2,635, respectively)	2,211	3,378	5,135	4,584
Unrealized gain on securities (net of tax of $2,882; $996; $2,062 and $707, respectively)	6,401	2,076	4,962	1,724
Unrealized gain on derivatives (net of tax benefit of $324; $272; $278 and $164, respectively)	(994)	(744)	(885)	(557)
Total Other Comprehensive Income	31,823	2,674	20,003	42,945
Total Comprehensive Income	100,237	48,761	195,306	126,899
Less: Comprehensive Income Attributable to Noncontrolling Interests	9,507	6,230	17,134	19,263
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 90,730	$ 42,531	$ 178,172	$ 107,636