Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2014		Aug. 31, 2013
Net Sales	$ 1,203,896		$ 1,164,674
Cost of Sales	695,503		665,602
Gross Profit	508,393		499,072
Selling, General and Administrative Expenses	346,525		335,459
Interest Expense	19,415		20,725
Investment (Income), Net	(3,803)		(3,894)
Other (Income), Net	(1,822)		(434)
Income (Loss) Before Income Taxes	148,078		147,216
Provision for Income Taxes	43,239		40,327
Net Income	104,839		106,889
Less: Net Income Attributable to Noncontrolling Interests	5,760		3,791
Net Income Attributable to RPM International Inc. Stockholders	$ 99,079		$ 103,098
Average Number of Shares of Common Stock Outstanding:
Basic	130,094		129,344
Diluted	135,032		130,294
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders
Basic	$ 0.74		$ 0.78
Diluted	$ 0.73	[1]	$ 0.77	[1]
Cash Dividends Declared per Share of Common Stock	$ 0.240		$ 0.225

[1] For the quarters ended August 31, 2014 and 2013, approximately 3,034,000 and 3,097,000 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted earnings per share, as the effect would have been anti-dilutive.