RPM International (RPM) 10-Q 5 Apr 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Feb. 28, 2018	Apr. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Feb. 28, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	RPM
Entity Registrant Name	RPM INTERNATIONAL INC/DE/
Entity Central Index Key	110,621
Current Fiscal Year End Date	--05-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		133,729,592

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Current Assets
Cash and cash equivalents	$ 264,386	$ 350,497
Trade accounts receivable (less allowances of $42,244 and $44,138, respectively)	884,295	995,330
Inventories	930,594	788,197
Prepaid expenses and other current assets	278,069	263,412
Total current assets	2,357,344	2,397,436
Property, Plant and Equipment, at Cost	1,570,597	1,484,579
Allowance for depreciation	(797,610)	(741,893)
Property, plant and equipment, net	772,987	742,686
Other Assets
Goodwill	1,185,890	1,143,913
Other intangible assets, net of amortization	577,861	573,092
Deferred income taxes	21,042	19,793
Other	220,801	213,529
Total other assets	2,005,594	1,950,327
Total Assets	5,135,925	5,090,449
Current Liabilities
Accounts payable	433,372	534,718
Current portion of long-term debt	3,767	253,645
Accrued compensation and benefits	139,243	181,084
Accrued losses	21,107	31,735
Other accrued liabilities	324,624	234,212
Total current liabilities	922,113	1,235,394
Long-Term Liabilities
Long-term debt, less current maturities	2,179,658	1,836,437
Other long-term liabilities	334,913	482,491
Deferred income taxes	63,219	97,427
Total long-term liabilities	2,577,790	2,416,355
Commitments and contingencies (Note 14)
Stockholders' Equity
Preferred stock, par value $0.01; authorized 50,000 shares; none issued
Common stock, par value $0.01; authorized 300,000 shares; issued 141,712 and outstanding 133,730 as of February 28, 2018; issued 141,242 and outstanding 133,563 as of May 31, 2017	1,337	1,336
Paid-in capital	972,187	954,491
Treasury stock, at cost	(233,288)	(218,222)
Accumulated other comprehensive (loss)	(405,734)	(473,986)
Retained earnings	1,298,876	1,172,442
Total RPM International Inc. stockholders' equity	1,633,378	1,436,061
Noncontrolling Interest	2,644	2,639
Total equity	1,636,022	1,438,700
Total Liabilities and Stockholders' Equity	$ 5,135,925	$ 5,090,449

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Statement Of Financial Position [Abstract]
Trade accounts receivable, allowances	$ 42,244	$ 44,138
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	50,000,000	50,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	300,000,000	300,000,000
Common stock, issued	141,712,000	141,242,000
Common stock, outstanding	133,730,000	133,563,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Income Statement [Abstract]
Net Sales		$ 1,102,677	$ 1,022,496	$ 3,763,487	$ 3,465,329
Cost of Sales		663,184	593,923	2,200,971	1,963,033
Gross Profit		439,493	428,573	1,562,516	1,502,296
Selling, General and Administrative Expenses		382,972	386,032	1,196,980	1,189,611
Goodwill and Other Intangible Asset Impairments			4,900		193,198
Interest Expense		27,459	23,769	80,628	69,452
Investment (Income), Net		(5,471)	(3,627)	(13,663)	(9,881)
Other (Income) Expense, Net		(165)	502	(592)	1,301
Income Before Income Taxes		34,698	16,997	299,163	58,615
(Benefit) Provision for Income Taxes		(5,890)	4,313	45,814	2,793
Net Income		40,588	12,684	253,349	55,822
Less: Net Income Attributable to Noncontrolling Interests		361	756	1,243	2,051
Net Income Attributable to RPM International Inc. Stockholders		$ 40,227	$ 11,928	$ 252,106	$ 53,771
Average Number of Shares of Common Stock Outstanding:
Basic		131,178	130,677	131,195	130,657
Diluted	[1]	131,178	130,677	135,657	130,657
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 0.30	$ 0.09	$ 1.90	$ 0.41
Diluted		0.30	0.09	1.87	0.41
Cash Dividends Declared per Share of Common Stock		$ 0.320	$ 0.300	$ 0.940	$ 0.875
[1]	Restricted shares totaling 48,212 for the three and nine months ended February 28, 2018 were excluded from the calculation of diluted earnings per share because the grant price of the restricted shares exceeded the average market price of the shares during the period and their effect, accordingly, would have been anti-dilutive. There were no restricted shares identified as being anti-dilutive for the three and nine months ended February 28, 2017. In addition, stock appreciation rights (SARs) totaling 600,000 for the three and nine months ended February 28, 2018 and 2017 were excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 40,588	$ 12,684	$ 253,349	$ 55,822
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	31,133	16,576	67,453	(46,919)
Pension and other postretirement benefit liability adjustments (net of tax of $1,319; $1,863; $3,576; $6,626, respectively)	2,279	3,222	5,974	12,516
Unrealized (loss) gain on securities (net of tax of $(1,070); $1,192; $43; $1,968, respectively)	(2,380)	2,577	91	3,286
Unrealized (loss) on derivatives	(2,137)		(5,277)
Total other comprehensive income (loss)	28,895	22,375	68,241	(31,117)
Total Comprehensive Income	69,483	35,059	321,590	24,705
Less: Comprehensive Income Attributable to Noncontrolling Interests	393	756	1,234	2,051
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 69,090	$ 34,303	$ 320,356	$ 22,654

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Statement Of Income And Comprehensive Income [Abstract]
Pension and other postretirement benefit liability adjustments, Tax	$ 1,319	$ 1,863	$ 3,576	$ 6,626
Unrealized gain (loss) on securities, Tax	$ (1,070)	$ 1,192	$ 43	$ 1,968

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Cash Flows From Operating Activities:
Net income	$ 253,349	$ 55,822
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation	61,078	53,343
Amortization	35,123	33,497
Goodwill and Other Intangible Asset Impairments		193,198
Deferred income taxes	(42,885)	(26,996)
Stock-based compensation expense	17,698	25,005
Other non-cash interest expense	4,275	7,149
Realized (gains) on sales of marketable securities	(6,833)	(5,338)
Other	(71)	136
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
Decrease in receivables	138,942	190,423
(Increase) in inventory	(121,095)	(143,409)
Decrease (increase) in prepaid expenses and other current and long-term assets	14,307	(26,698)
(Decrease) in accounts payable	(112,888)	(95,727)
(Decrease) in accrued compensation and benefits	(45,873)	(50,425)
(Decrease) increase in accrued losses	(11,001)	2,247
(Decrease) in other accrued liabilities	(42,895)	(35,135)
Other	(483)	(3,613)
Cash Provided By Operating Activities	140,748	173,479
Cash Flows From Investing Activities:
Capital expenditures	(72,769)	(80,110)
Acquisition of businesses, net of cash acquired	(59,991)	(246,874)
Purchase of marketable securities	(139,641)	(36,418)
Proceeds from sales of marketable securities	97,624	36,696
Other	6,766	1,493
Cash (Used For) Investing Activities	(168,011)	(325,213)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt	340,106	422,521
Reductions of long-term and short-term debt	(264,051)	(78,654)
Cash dividends	(125,672)	(116,680)
Shares repurchased and returned for taxes	(15,065)	(20,092)
Payments of acquisition-related contingent consideration	(3,825)	(4,206)
Payments to 524(g) trust		(102,500)
Other	(1,911)	(2,009)
Cash (Used For) Provided By Financing Activities	(70,418)	98,380
Effect of Exchange Rate Changes on Cash and Cash Equivalents	11,570	(1,002)
Net Change in Cash and Cash Equivalents	(86,111)	(54,356)
Cash and Cash Equivalents at Beginning of Period	350,497	265,152
Cash and Cash Equivalents at End of Period	$ 264,386	$ 210,796

Consolidation, Noncontrolling I

Consolidation, Noncontrolling Interests and Basis of Presentation	9 Months Ended
	Feb. 28, 2018
Accounting Policies [Abstract]
Consolidation, Noncontrolling Interests and Basis of Presentation	NOTE 1 — CONSOLIDATION, NONCONTROLLING INTERESTS AND BASIS OF PRESENTATION The accompanying unaudited consolidated financial statements have been prepared in accordance with Generally Accepted Accounting Principles in the U.S. (“GAAP”) for interim financial information and the instructions to Form 10-Q. In our opinion, all adjustments (consisting of normal, recurring accruals) considered necessary for a fair presentation have been included for the three and nine month periods ended February 28, 2018 and 2017. For further information, refer to the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended May 31, 2017. Our financial statements include all of our majority-owned subsidiaries. We account for our investments in less-than-majority-owned joint ventures, for which we have the ability to exercise significant influence, under the equity method. Effects of transactions between related companies are eliminated in consolidation. Noncontrolling interests are presented in our consolidated financial statements as if parent company investors (controlling interests) and other minority investors (noncontrolling interests) in partially-owned subsidiaries have similar economic interests in a single entity. As a result, investments in noncontrolling interests are reported as equity in our consolidated financial statements. Additionally, our consolidated financial statements include 100% of a controlled subsidiary’s earnings, rather than only our share. Transactions between the parent company and noncontrolling interests are reported in equity as transactions between stockholders, provided that these transactions do not create a change in control. Our business is dependent on external weather factors. Historically, we have experienced strong sales and net income in our first, second and fourth fiscal quarters comprising the three month periods ending August 31, November 30 and May 31, respectively, with weaker performance in our third fiscal quarter (December through February).

New Accounting Pronouncements

New Accounting Pronouncements	9 Months Ended
	Feb. 28, 2018
Accounting Changes And Error Corrections [Abstract]
New Accounting Pronouncements	NOTE 2 — NEW ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which establishes a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under GAAP. The new standard prescribes a five-step model for recognizing revenue, which will require significant judgment in its application. The new standard requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Under the original issuance, the new standard would have applied to annual periods beginning after December 15, 2016, including interim periods therein. However, in August 2015, the FASB issued ASU 2015-14, which extends the standard effective date by one year and includes an option to apply the standard on the original effective date. The provisions of this ASU may be applied retrospectively to each prior reporting period presented, or on a modified retrospective basis by recognizing a cumulative catch-up transition amount at the date of initial application. We have selected the modified retrospective transition method, which we will apply upon adoption of the standard as of June 1, 2018. Given the scope of work required to implement the recognition and disclosure requirements under the new standard, we began our assessment process during fiscal 2016. Our progress to date includes a preliminary identification of areas which will require changes to policies, processes, systems or internal controls. We expect revenue recognition for our broad portfolio of products and services to remain largely unchanged. However, the guidance is expected to change the timing of revenue recognition in certain areas, including our accounting for long-term construction contracts. While these impacts are not expected to be material to our overall Consolidated Financial Statements, we do anticipate that the new disclosure requirements surrounding revenue recognition will be significant. We continue to assess all potential impacts of the guidance and given the stage of our adoption procedures as well as our normal ongoing business dynamics, our preliminary conclusions and assessments of the potential impacts on each of our different business units’ revenue streams are subject to change. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which increases lease transparency and comparability among organizations. Under the new standard, lessees will be required to recognize all assets and liabilities arising from leases on the balance sheet, with the exception of leases with a term of 12 months or less, which permits a lessee to make an accounting policy election by class of underlying asset not to recognize lease assets and liabilities. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted. The new standard requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. At a minimum, total assets and total liabilities will increase in the period the ASU is adopted. At February 28, 2018, our total undiscounted future minimum payments outstanding for operating lease obligations approximated $276.0 million. In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which makes a number of changes meant to add or clarify guidance on the classification of certain cash receipts and payments in the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, entities must apply the guidance retrospectively to all periods presented. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, “Business Combinations: Clarifying the Definition of a Business,” with the objective of adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions (disposals) of assets or of businesses. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. We are currently reviewing the impact this revised guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate step two from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for fiscal years beginning after December 15, 2019. Early application is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Adoption of this guidance is not expected to have a material impact on our Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are currently reviewing the impact this guidance will have on our Consolidated Financial Statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” which simplifies hedge accounting through changes to both designation and measurement requirements. For hedges that qualify as highly effective, the new standard eliminates the requirement to separately measure and record hedge ineffectiveness, resulting in better alignment between the presentation of the effects of the hedging instrument and the hedged item in the financial statements. ASU No. 2017-12 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted in any interim period after issuance of the update. Our early adoption of this pronouncement during our current quarter ended November 30, 2017 did not have a material impact on our Consolidated Financial Statements. Refer to Note 6, “Derivatives and Hedging,” for further information.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Feb. 28, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE 3 — GOODWILL AND OTHER INTANGIBLE ASSETS During the three and nine month periods ended February 28, 2017, we recorded impairment charges related to a reduction of the carrying value of goodwill and other intangible assets totaling $4.9 million and $193.2 million, respectively. All of the charges were recorded by our consumer reportable segment. The goodwill impairment loss incurred during fiscal 2017 totaled $140.5 million, and the impairment losses for other intangible assets, totaling $52.6 million, related to formulae for $15.3 million; customer-related intangibles for $30.1 million; other intangibles for $0.2 million and indefinite-lived trademarks for $7.0 million. Total accumulated goodwill impairment losses were $156.3 million and $155.4 million at February 28, 2018 and 2017, which comprise the goodwill impairment loss incurred during fiscal 2017 as well as a $14.9 million goodwill impairment loss recorded by our industrial reportable segment during fiscal 2009. The gross amount of other intangible asset accumulated impairment losses were $53.6 million and $53.2 million at February 28, 2018 and 2017, which comprise the other intangible asset impairment loss incurred during fiscal 2017 as well as a $0.6 million other intangible asset impairment loss recorded by our industrial reportable segment during fiscal 2009.

Marketable Securities

Marketable Securities	9 Months Ended
	Feb. 28, 2018
Investments Debt And Equity Securities [Abstract]
Marketable Securities	NOTE 4 — MARKETABLE SECURITIES The following tables summarize marketable securities held at February 28, 2018 and May 31, 2017 by asset type: Available-For-Sale Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) February 28, 2018 Equity securities: Stocks - domestic $ 1,235 $ 76 $ - $ 1,311 Mutual funds - foreign 45,397 3,229 (299 ) 48,327 Mutual funds - domestic 106,443 1,874 (2,938 ) 105,379 Total equity securities 153,075 5,179 (3,237 ) 155,017 Fixed maturity: U.S. treasury and other government 22,773 29 (593 ) 22,209 Corporate bonds 532 49 (7 ) 574 Total fixed maturity securities 23,305 78 (600 ) 22,783 Total $ 176,380 $ 5,257 $ (3,837 ) $ 177,800 Available-For-Sale Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2017 Equity securities: Stocks - domestic $ 2,391 $ 76 $ - $ 2,467 Mutual funds - foreign 35,169 2,470 (204 ) 37,435 Mutual funds - domestic 102,671 2,084 (3,118 ) 101,637 Total equity securities 140,231 4,630 (3,322 ) 141,539 Fixed maturity: U.S. treasury and other government 22,176 120 (177 ) 22,119 Corporate bonds 706 97 (6 ) 797 Total fixed maturity securities 22,882 217 (183 ) 22,916 Total $ 163,113 $ 4,847 $ (3,505 ) $ 164,455 Marketable securities, included in other current and long-term assets totaling $95.9 million and $81.9 million at February 28, 2018, respectively, and included in other current and long-term assets totaling $89.5 million and $75.0 million at May 31, 2017, respectively, are composed of available-for-sale securities and are reported at fair value. We carry a portion of our marketable securities portfolio in long-term assets since they are generally held for the settlement of our general and product liability insurance claims processed through our wholly owned captive insurance subsidiaries. Marketable securities are composed of available-for-sale securities and are reported at fair value. Realized gains and losses on sales of investments are recognized in net income on the specific identification basis. Changes in the fair values of securities that are considered temporary are recorded as unrealized gains and losses, net of applicable taxes, in accumulated other comprehensive (loss) within stockholders’ equity. Other-than-temporary declines in market value from original cost are reflected in operating income in the period in which the unrealized losses are deemed other than temporary. In order to determine whether other-than-temporary declines in market value have occurred, the duration of the decline in value and our ability to hold the investment are considered in conjunction with an evaluation of the strength of the underlying collateral and the extent to which the investment’s amortized cost or cost, as appropriate, exceeds its related market value. Gross realized gains on sales of investments were $2.6 million and $1.7 million for the quarters ended February 28, 2018 and 2017, respectively. During the third quarter of fiscal 2018 and 2017, we recognized gross realized losses on sales of investments of $0.7 million and $0.1 million, respectively. Gross realized gains on sales of investments were $8.6 million and $6.4 million for the nine months ended February 28, 2018 and 2017, respectively. During the first nine months of fiscal 2018 and 2017, we recognized gross realized losses on sales of investments of $1.8 million and $1.1 million, respectively. During the first nine months of fiscal 2017, we recognized losses of approximately $0.4 million for securities deemed to have other-than-temporary impairments, while there were no such losses during the first nine months of fiscal 2018. These amounts are included in investment (income), net in the Consolidated Statements of Income. Summarized below are the securities we held at February 28, 2018 and May 31, 2017 that were in an unrealized loss position and that were included in accumulated other comprehensive (loss), aggregated by the length of time the investments had been in that position: February 28, 2018 May 31, 2017 (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Total investments with unrealized losses $ 93,287 $ (3,837 ) $ 59,987 $ (3,505 ) Unrealized losses with a loss position for less than 12 months 56,775 (795 ) 40,854 (2,983 ) Unrealized losses with a loss position for more than 12 months 36,512 (3,042 ) 19,133 (522 ) We have reviewed all of the securities included in the table above and have concluded that we have the ability and intent to hold these investments until their cost can be recovered, based upon the severity and duration of the decline. Therefore, we did not recognize any other-than-temporary impairment losses on these investments. The unrealized losses generally relate to investments whose fair values at February 28, 2018 were less than 15% below their original cost. From time to time, we may experience significant volatility in general economic and market conditions. If we were to experience unrealized losses that were to continue for longer periods of time, or arise to more significant levels of unrealized losses within our portfolio of investments in marketable securities in the future, we may recognize additional other-than-temporary impairment losses. Such potential losses could have a material impact on our results of operations in any given reporting period. As such, we continue to closely evaluate the status of our investments and our ability and intent to hold these investments. The net carrying values of debt securities at February 28, 2018, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties. (In thousands) Amortized Fair Due: Less than one year $ 4,894 $ 4,856 One year through five years 14,180 13,825 Six years through ten years 3,137 2,977 After ten years 1,094 1,125 $ 23,305 $ 22,783

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Feb. 28, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 5 — FAIR VALUE MEASUREMENTS Financial instruments recorded in the balance sheet include cash and cash equivalents, trade accounts receivable, marketable securities, notes and accounts payable, and debt. An allowance for anticipated uncollectible trade receivable amounts is established using a combination of specifically identified accounts to be reserved, and a reserve covering trends in collectibility. These estimates are based on an analysis of trends in collectibility and past experience, but are primarily made up of individual account balances identified as doubtful based on specific facts and conditions. Receivable losses are charged against the allowance when we confirm uncollectibility. The valuation techniques utilized for establishing the fair values of assets and liabilities are based on observable and unobservable inputs. Observable inputs reflect readily obtainable data from independent sources, while unobservable inputs reflect management’s market assumptions. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value, as follows: Level 1 Inputs — Quoted prices for identical instruments in active markets. Level 2 Inputs — Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 Inputs — Instruments with primarily unobservable value drivers. The following tables present our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. (In thousands) Quoted in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at February 28, 2018 U.S. Treasury and other government $ - $ 22,209 $ - $ 22,209 Corporate bonds 574 574 Stocks - domestic 1,311 1,311 Mutual funds - foreign 48,327 48,327 Mutual funds - domestic 105,379 105,379 Contingent consideration (14,653 ) (14,653 ) Total $ 1,311 $ 176,489 $ (14,653 ) $ 163,147 (In thousands) Quoted in Active Markets for Identical (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2017 U.S. Treasury and other government $ - $ 22,119 $ - $ 22,119 Corporate bonds 797 797 Stocks - domestic 2,467 2,467 Mutual funds - foreign 37,435 37,435 Mutual funds - domestic 101,637 101,637 Contingent consideration (17,979 ) (17,979 ) Total $ 2,467 $ 161,988 $ (17,979 ) $ 146,476 Our marketable securities are primarily composed of available-for-sale securities, and are valued using a market approach. The availability of inputs observable in the market varies from instrument to instrument and depends on a variety of factors including the type of instrument, whether the instrument is actively traded, and other characteristics particular to the transaction. For most of our financial instruments, pricing inputs are readily observable in the market, the valuation methodology used is widely accepted by market participants, and the valuation does not require significant management discretion. For other financial instruments, pricing inputs are less observable in the market and may require management judgment. The contingent consideration represents the estimated fair value of the additional variable cash consideration payable in connection with recent acquisitions that is contingent upon the achievement of certain performance milestones. We estimated the fair value using expected future cash flows over the period in which the obligation is expected to be settled, and applied a discount rate that appropriately captures a market participant's view of the risk associated with the obligation, which are considered to be Level 3 inputs. During the first nine months of fiscal 2018, we paid approximately $3.8 million for settlements of contingent consideration obligations relating to certain performance milestones that were established in prior periods and achieved during the current period, and we increased our accrual by $0.5 million for fair value adjustments. During the first nine months of fiscal 2017, we accrued an additional approximate $6.9 million for contingent payments related to acquisitions, including the estimated amount for the mandatory purchase of a step-acquisition, and paid approximately $4.2 million for settlements of contingent consideration obligations relating to certain performance milestones that were established in prior periods and achieved during last year’s first nine months. These amounts are reported in payments of acquisition-related contingent consideration in cash flows from financing activities in the Consolidated Statements of Cash Flows. The carrying value of our current financial instruments, which include cash and cash equivalents, marketable securities, trade accounts receivable, accounts payable and short-term debt approximates fair value because of the short-term maturity of these financial instruments. At February 28, 2018 and May 31, 2017, the fair value of our long-term debt was estimated using active market quotes, based on our current incremental borrowing rates for similar types of borrowing arrangements, which are considered to be Level 2 inputs. Based on the analysis performed, the fair value and the carrying value of our financial instruments and long-term debt as of February 28, 2018 and May 31, 2017 are as follows: At February 28, 2018 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 264,386 $ 264,386 Marketable equity securities 155,017 155,017 Marketable debt securities 22,783 22,783 Long-term debt, including current portion 2,183,425 2,243,062 At May 31, 2017 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 350,497 $ 350,497 Marketable equity securities 141,539 141,539 Marketable debt securities 22,916 22,916 Long-term debt, including current portion 2,090,082 2,243,167

Derivatives and Hedging

Derivatives and Hedging	9 Months Ended
	Feb. 28, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	NOTE 6 — DERIVATIVES AND HEDGING Derivative Instruments and Hedging Activities We are exposed to market risks, such as changes in foreign currency exchange rates and interest rates. To manage the volatility related to these exposures, from time to time, we enter into various derivative transactions. We use various types of derivative instruments including forward contracts and swaps. We formally assess, designate and document, as a hedge of an underlying exposure, each qualifying derivative instrument that will be accounted for as an accounting hedge at inception. Additionally, we assess, both at inception and at least quarterly thereafter, whether the financial instruments used in the hedging transaction are effective at offsetting changes in either the fair values or cash flows of the underlying exposures. Net Investment Hedge In October 2017, as a means of mitigating the impact of currency fluctuations on our Euro investments in foreign entities, we executed a fair value hedge and two cross currency swaps, in which we will pay variable rate interest in Euros and receive fixed rate interest in U.S. Dollars with a combined notional amount of approximately €85.25 million ($100 million U.S. Dollar equivalent), and which have a maturity date of November 2022. This effectively converts a portion of our U.S. Dollar denominated fixed rate debt to Euro denominated variable rate debt. The fair value hedge is recognized at fair value in our Consolidated Balance Sheets, while changes in the fair value of the hedge are recognized in interest expense in our Consolidated Statements of Income. We designated the swaps as net investment hedges of our net investment in our European operations under ASU 2017-12 and applied the spot method to these hedges. The changes in fair value of the derivative instruments that are designated and qualify as hedges of net investments in foreign operations are recognized in accumulated other comprehensive income (“AOCI”) to offset the changes in the values of the net investments being hedged. Amounts released from AOCI and reclassified into interest expense did not have a material impact on our Consolidated Financial Statements for any period presented. Derivatives Designated as Cash Flow Hedging Instruments We have designated certain forward contracts as hedging instruments pursuant to ASC No. 815 (“ASC 815”), “Derivatives and Hedging.” Changes in the fair value of these highly effective hedges are recorded as a component of AOCI. During the period in which a forecasted transaction affects earnings, amounts previously recorded as a component of AOCI are reclassified into earnings as a component of cost of sales. Amounts released from AOCI and reclassified into earnings did not have a material impact on our Consolidated Financial Statements for any period presented. As of February 28, 2018, and May 31, 2017 the notional amount of the forward contracts held to sell international currencies was $11.6 million and $9.8 million, respectively. Derivatives Not Designated as Hedges At February 28, 2018, we held three foreign currency forward contracts designed to reduce our exposure to changes in the cash flows of intercompany foreign-currency-denominated loans related to changes in foreign currency exchange rates by fixing the functional currency cash flows. These contracts have not been designated as hedges; therefore, the changes in fair value of these derivatives are recognized in earnings as a component of other (income) expense. Amounts recognized in earnings did not have a material impact on our Consolidated Financial Statements for any period presented. As of February 28, 2018 and May 31, 2017, the notional amounts of the forward contracts held to purchase foreign currencies was $158.1 million and $49.4 million, respectively. Disclosure about Derivative Instruments All of our derivative assets and liabilities measured at fair value are classified as Level 2 within the fair value hierarchy. We determine the fair value of our derivatives based on valuation methods, which project future cash flows and discount the future amounts to present value using market based observable inputs, including interest rate curves, foreign currency rates, as well as future and basis point spreads, as applicable. The fair values of qualifying and non-qualifying instruments used in hedging transactions as of February 28, 2018 and May 31, 2017 are as follows: (in thousands) Fair Value Derivatives Designated as Hedging Instruments Balance Sheet Location February 28, 2018 May 31, 2017 Assets: Foreign Currency Exchange (Cash Flow) Other Current Assets 304 15 Cross Currency Swap (Net Investment) Other Current Assets 1,717 - Cross Currency Swap (Net Investment) Other Assets (Long-Term) 1,009 - Liabilities: Interest Rate Swap (Fair Value) Other Accrued Liabilities 117 - Cross Currency Swap (Net Investment) Other Long-Term Liabilities 8,188 - Interest Rate Swap (Fair Value) Other Long-Term Liabilities 2,923 - (in thousands) Fair Value Derivatives Not Designated as Hedging Instruments Balance Sheet Location February 28, 2018 May 31, 2017 Assets: Foreign Currency Exchange Other Current Assets 2,926 24 Liabilities: Foreign Currency Exchange Other Accrued Liabilities 64 -

Investment (Income), Net

Investment (Income), Net	9 Months Ended
	Feb. 28, 2018
Other Income And Expenses [Abstract]
Investment (Income), Net	NOTE 7 — Investment (income), net, consists of the following components: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands) 2018 2017 2018 2017 Interest (income) $ (1,454 ) $ (1,599 ) $ (3,645 ) $ (3,832 ) Net (gain) on sale of marketable securities (1,935 ) (1,640 ) (6,833 ) (5,338 ) Other-than-temporary impairment on securities 17 420 Dividend (income) (2,082 ) (405 ) (3,185 ) (1,131 ) Investment (income), net $ (5,471 ) $ (3,627 ) $ (13,663 ) $ (9,881 )

Other (Income) Expense, Net

Other (Income) Expense, Net	9 Months Ended
	Feb. 28, 2018
Other Income And Expenses [Abstract]
Other (Income) Expense, Net	NOTE 8 — Other (income) expense, net, consists of the following components: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands) 2018 2017 2018 2017 Royalty expense, net $ 148 $ 744 $ 238 $ 2,080 (Income) related to unconsolidated equity affiliates (313 ) (242 ) (830 ) (779 ) Other (income) expense, net $ (165 ) $ 502 $ (592 ) $ 1,301

Income Taxes

Income Taxes	9 Months Ended
	Feb. 28, 2018
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 9 — INCOME TAXES On December 22, 2017, the Tax Cuts and Jobs Act (the “Act”) was enacted into law. The income tax effects of changes in tax laws are recognized in the period when enacted. The Act provides for numerous significant tax law changes and modifications with varying effective dates. Provisions of the Act that impact our fiscal third quarter ending February 28, 2018 include reducing the corporate income tax rate from 35% to 21%, creating a territorial tax system (with a one-time mandatory tax on previously deferred foreign earnings), broadening the tax base and allowing for immediate capital expensing of certain qualified property. The corporate tax rate reduction is effective for RPM as of January 1, 2018 and, accordingly, reduces our current fiscal year federal statutory rate to a blended rate of approximately 29.2%. The SEC staff issued SAB 118, which provides guidance on accounting for the tax effects of the Act. SAB 118 provides a measurement period that should not extend beyond one year from the Act’s enactment date for companies to complete the applicable accounting under ASC 740. In accordance with SAB 118 and based on the information available as of February 28, 2018, we recorded a net provisional discrete income tax benefit of $1.4 million as a result of the Act being enacted during our current quarter. The net provisional income tax benefit is comprised of a benefit of $24.1 million related to the provisional re-measurement of our U.S. deferred tax assets and liabilities at the reduced U.S. corporate tax rates and a provisional benefit of $44.1 million for the partial reversal of existing deferred tax liabilities recorded for the estimated tax cost associated with unremitted foreign earnings not considered permanently reinvested, partially offset by a $66.8 million provisional charge for the transition tax on previously deferred foreign earnings. We are estimating that the cash tax associated with the transition tax will be significantly reduced due to the utilization of existing foreign tax credits. The net provisional income tax benefit of $1.4 million is based on estimates as of the interim period ended February 28, 2018 and includes forecasts of full year fiscal 2018 results, including estimates of certain U.S. and foreign tax attributes. The re-measurement of our U.S. deferred tax assets and liabilities is provisional as we do not perform a detailed analysis of these items on an interim basis. Variances in our forecasted versus actual results will impact the provisional amount recorded for the transition tax liability. Additionally, we expect that taxing jurisdictions will issue future guidance or interpretations of the Act. These factors, as well as potential updates to our interpretations of the Act, will impact the net provisional income tax benefit recorded during this quarter. As a result, adjustments to the provisional income tax benefit will be recorded in future periods. As a result of the change to U.S. taxation of unremitted foreign earnings under the Act, we are in the process of evaluating our permanent reinvestment assertions with respect to unremitted foreign earnings. The above noted provisional deferred tax liability adjustment of $44.1 million includes our preliminary estimate, as of February 28, 2018, of our position with respect to foreign earnings not considered to be permanently reinvested. Certain provisions of the Act will first impact us starting in our fiscal 2019 year. These provisions include, but are not limited to, the base erosion anti-abuse tax, the provision designed to tax global intangible low-taxed income, and the repeal of the domestic production activities deduction. We are evaluating the impact of these provisions on future fiscal years and, accordingly, we have not made any elections related to these provisions as of February 28, 2018. The effective income tax rate was (17.0%) for the three months ended February 28, 2018. Excluding the $1.4 million provisional (benefit) described above, the effective income tax rate was (12.9%) for the three months ended February 28, 2018. The (12.9%) rate reflects the favorable cumulative impact of the U.S. fiscal 2018 statutory rate reduction from 35% to 29.2%. The effective income tax expense rate for the three months ended February 28, 2017 was 25.4%. The effective income tax rate was 15.3% for the nine months ended February 28, 2018. Excluding the $1.4 million provisional described above, the effective income tax rate was 15.8% for the nine months ended February 28, 2018. The 15.8% effective income tax rate benefit rate reflects the favorable impact of the U.S. fiscal 2018 statutory rate reduction from 35% to 29.2%. The effective income tax expense rate for the nine months ended February 28, 2017 was 4.8%. Additionally, income tax expense for the nine-month period ended February 28, 2018 reflects discrete tax benefits of $27.0 million as reported in the prior quarters of this fiscal year. Income tax expense for the nine months ended February 28, 2017 includes a favorable discrete adjustment for excess tax benefits related to equity compensation of $11.5 million. Our deferred tax liability for unremitted foreign earnings of $64.1 million as of November 30, 2017 has been adjusted to $20.0 million as of February 28, 2018. The $20.0 million deferred tax liability represents our provisional estimate of the foreign tax cost associated with our preliminary estimate of $446.0 million of foreign earnings that are not considered to be permanently reinvested. As noted above, with the change in U.S. taxation of foreign earnings, we are evaluating our position with respect to permanent reinvestment of foreign earnings based on various factors, including future liquidity needs, our global capital structure and the foreign tax implications of future earnings repatriations.

Inventories

Inventories	9 Months Ended
	Feb. 28, 2018
Inventory Disclosure [Abstract]
Inventories	NOTE 10 — INVENTORIES Inventories, net of reserves, were composed of the following major classes: February 28, 2018 May 31, 2017 (In thousands) Raw material and supplies $ 290,257 $ 248,426 Finished goods 640,337 539,771 Total Inventory, Net of Reserves $ 930,594 $ 788,197

Stock Repurchase Program

Stock Repurchase Program	9 Months Ended
	Feb. 28, 2018
Equity [Abstract]
Stock Repurchase Program	NOTE 11 — STOCK REPURCHASE PROGRAM On January 8, 2008, we announced our authorization of a stock repurchase program under which we may repurchase shares of RPM International Inc. common stock at management’s discretion for general corporate purposes. Our current intent is to limit our repurchases only to amounts required to offset dilution created by stock issued in connection with our equity-based compensation plans, or approximately one to two million shares per year. As a result of this authorization, we may repurchase shares from time to time in the open market or in private transactions at various times and in amounts and for prices that our management deems appropriate, subject to insider trading rules and other securities law restrictions. The timing of our purchases will depend upon prevailing market conditions, alternative uses of capital and other factors. We may limit or terminate the repurchase program at any time. During the three and nine month periods ended February 28, 2018 and 2017, we did not repurchase any shares of our common stock under this program.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Feb. 28, 2018
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 12 — EARNINGS PER SHARE The following table sets forth the reconciliation of the numerator and denominator of basic and diluted earnings per share, as calculated using the two-class method for the three and nine month periods ended February 28, 2018 and 2017. For the three months ended February 28, 2018 and 2017, and the nine months ended February 28, 2017, basic weighted-average shares outstanding and basic net income available to common shareholders and basic weighted average common shares were used in calculating diluted earnings per share under the two-class method, as that method resulted in the most-dilutive earnings per share. Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands, except per share amounts) 2018 2017 2018 2017 Numerator for earnings per share: Net income attributable to RPM International Inc. stockholders $ 40,227 $ 11,928 $ 252,106 $ 53,771 Less: Allocation of earnings and dividends to participating securities (530 ) (232 ) (3,373 ) (847 ) Net income available to common shareholders - basic 39,697 11,696 248,733 52,924 Add: Undistributed earnings reallocated to unvested shareholders 7 Add: Income effect of contingently issuable shares 4,351 Net income available to common shareholders - diluted $ 39,697 $ 11,696 $ 253,091 $ 52,924 Denominator for basic and diluted earnings per share: Basic weighted average common shares 131,178 130,677 131,195 130,657 Average diluted options 540 Additional shares issuable assuming conversion of convertible securities (1) 3,922 Total shares for diluted earnings per share (2) 131,178 130,677 135,657 130,657 Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders: Basic Earnings Per Share of Common Stock $ 0.30 $ 0.09 $ 1.90 $ 0.41 Diluted Earnings Per Share of Common Stock $ 0.30 $ 0.09 $ 1.87 $ 0.41 (1) Represents the number of shares that would be issued if our contingently convertible notes were converted. We include these shares in the calculation of diluted EPS as the conversion of the notes may be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. (2) Restricted shares totaling 48,212 for the three and nine months ended February 28, 2018 were excluded from the calculation of diluted earnings per share because the grant price of the restricted shares exceeded the average market price of the shares during the period and their effect, accordingly, would have been anti-dilutive. There were no restricted shares identified as being anti-dilutive for the three and nine months ended February 28, 2017. In addition, stock appreciation rights (SARs) totaling 600,000 for the three and nine months ended February 28, 2018 and 2017 were excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive.

Pension Plans

Pension Plans	9 Months Ended
	Feb. 28, 2018
Compensation And Retirement Disclosure [Abstract]
Pension Plans	NOTE 13 — PENSION PLANS We offer defined benefit pension plans, defined contribution pension plans, as well as several unfunded health care benefit plans primarily for certain of our retired employees. The following tables provide the retirement-related benefit plans’ impact on income before income taxes for the three and nine month periods ended February 28, 2018 and 2017: U.S. Plans Non-U.S. Plans Three Months Ended Three Months Ended February 28, February 28, February 28, February 28, Pension Benefits 2018 2017 2018 2017 (In thousands) Service cost $ 9,465 $ 9,401 $ 1,175 $ 1,127 Interest cost 4,379 4,331 1,145 1,224 Expected return on plan assets (8,086 ) (6,252 ) (1,978 ) (1,886 ) Amortization of: Prior service cost (credit) 29 54 (6 ) Net actuarial losses recognized 3,618 5,540 451 573 Net Periodic Benefit Cost $ 9,405 $ 13,074 $ 787 $ 1,038 U.S. Plans Non-U.S. Plans Three Months Ended Three Months Ended February 28, February 28, February 28, February 28, Postretirement Benefits 2018 2017 2018 2017 (In thousands) Service cost $ - $ - $ 311 $ 284 Interest cost 43 57 224 222 Amortization of: Prior service (credit) (55 ) (58 ) Net actuarial losses recognized 6 79 60 Net Periodic Benefit (Credit) Cost $ (6 ) $ (1 ) $ 614 $ 566 U.S. Plans Non-U.S. Plans Nine Months Ended Nine Months Ended February 28, February 28, February 28, February 28, Pension Benefits 2018 2017 2018 2017 (In thousands) Service cost $ 28,395 $ 28,203 $ 3,525 $ 3,381 Interest cost 13,137 12,993 3,435 3,672 Expected return on plan assets (24,258 ) (18,756 ) (5,934 ) (5,658 ) Amortization of: Prior service cost 87 162 (18 ) - Net actuarial losses recognized 10,854 16,620 1,353 1,719 Net Periodic Benefit Cost $ 28,215 $ 39,222 $ 2,361 $ 3,114 U.S. Plans Non-U.S. Plans Nine Months Ended Nine Months Ended February 28, February 28, February 28, February 28, Postretirement Benefits 2018 2017 2018 2017 (In thousands) Service cost $ - $ - $ 933 $ 852 Interest cost 129 171 672 666 Amortization of: Prior service (credit) (165 ) (174 ) - - Net actuarial losses recognized 18 - 237 180 Net Periodic Benefit (Credit) Cost $ (18 ) $ (3 ) $ 1,842 $ 1,698 The decrease in pension and postretirement benefit cost from fiscal 2017 to 2018 reflects the impact of increased asset values, which we expect will generate higher returns, and a change in estimate for lump sum valuations. We expect that pension expense will fluctuate on a year-to-year basis, depending upon the investment performance of plan assets and potential changes in interest rates, but such changes are not expected to be material to our consolidated financial results. We previously disclosed in our financial statements for the fiscal year ended May 31, 2017 that we expected to contribute approximately $1.0 million to our retirement plans in the U.S. and approximately $7.0 million to plans outside the U.S. during the current fiscal year. As of February 28, 2018, we contributed an additional $52.8 million to the pension plans in the U.S., which will increase our total expected U.S. contributions for fiscal 2018 to $53.8 million.

Contingencies and Other Accrued

Contingencies and Other Accrued Losses	9 Months Ended
	Feb. 28, 2018
Commitments And Contingencies Disclosure [Abstract]
Contingencies and Other Accrued Losses	NOTE 14 — CONTINGENCIES AND OTHER ACCRUED LOSSES We provide, through our wholly owned insurance subsidiaries, certain insurance coverage, primarily product liability coverage, to our other subsidiaries. Excess coverage is provided by third-party insurers. Our product liability accruals provide for these potential losses as well as other uninsured claims. Product liability accruals are established based upon actuarial calculations of potential liability using industry experience, actual historical experience and actuarial assumptions developed for similar types of product liability claims, including development factors and lag times. To the extent there is a reasonable possibility that potential losses could exceed the amounts already accrued, we believe that the amount of any such additional loss would be immaterial to our results of operations, liquidity and consolidated financial position. We also offer warranties on many of our products, as well as long-term warranty programs at certain of our businesses, and have established product warranty liabilities. We review these liabilities for adequacy on a quarterly basis and adjust them as necessary. The primary factors that could affect these liabilities may include changes in performance rates as well as costs of replacement. Provision for estimated warranty costs is recorded at the time of sale and periodically adjusted, as required, to reflect actual experience. It is probable that we will incur future losses related to warranty claims we have received but that have not been fully investigated and related to claims not yet received. While our warranty liabilities represent our best estimates at February 28, 2018, we can provide no assurances that we will not experience material claims in the future or that we will not incur significant costs to resolve such claims beyond the amounts accrued or beyond what we may recover from our suppliers. Based upon the nature of the expense, product warranty expense is recorded as a reduction of sales, as a component of cost of sales, or within selling, general and administrative expense. Also, due to the nature of our businesses, the amount of claims paid can fluctuate from one period to the next. While our warranty liabilities represent our best estimates of our expected losses at any given time, from time-to-time we may revise our estimates based on our experience relating to factors such as weather conditions, specific circumstances surrounding product installations and other factors. The following table includes the changes in our accrued warranty balances: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, 2018 2017 2018 2017 (In thousands) Beginning Balance $ 14,457 $ 15,954 $ 19,149 $ 13,314 Deductions (1) (5,776 ) (3,662 ) (20,447 ) (12,094 ) Provision charged to expense 2,540 7,308 12,519 18,380 Ending Balance $ 11,221 $ 19,600 $ 11,221 $ 19,600 (1) Primarily claims paid during the year. In addition, like other companies participating in similar lines of business, some of our subsidiaries are involved in proceedings relating to environmental matters. It is our policy to accrue remediation costs when it is probable that such efforts will be required and the related costs can be reasonably estimated. These liabilities are undiscounted and are not material to our financial statements during any of the periods presented. We were notified by the SEC on June 24, 2014, that we are the subject of a formal investigation pertaining to the timing of our disclosure and accrual of loss reserves in fiscal 2013 with respect to the previously disclosed U.S. Department Of Justice (the “DOJ”) and the U.S. General Services Administration (the “GSA”) Office of Inspector General investigation into compliance issues relating to Tremco Roofing Division’s GSA contracts. As previously disclosed, our audit committee completed an investigation into the facts and circumstances surrounding the timing of our disclosure and accrual of loss reserves with respect to the GSA and DOJ investigation, and determined that it was appropriate to restate our financial results for the first, second and third quarters of fiscal 2013. These restatements had no impact on our audited financial statements for the fiscal years ended May 31, 2013 or 2014. The audit committee’s investigation concluded that there was no intentional misconduct on the part of any of our officers. In connection with the foregoing, on September 9, 2016, the SEC filed an enforcement action against us and our General Counsel. We have cooperated with the SEC’s investigation and believe the allegations in the complaint mischaracterize both our and our General Counsel’s actions in connection with the matters related to our quarterly results in fiscal 2013 and are without merit. Both we and our General Counsel filed motions to dismiss the complaint on February 24, 2017. Those motions to dismiss the complaint were denied by the Court on September 29, 2017. We and our General Counsel filed answers to the complaint on October 16, 2017. Formal discovery commenced in January 2018. We intend to continue to contest the allegations in the complaint vigorously. The action by the SEC could result in sanctions against us and/or our General Counsel and could impose substantial additional costs and distractions, regardless of its outcome. We have determined that it is probable that we will incur a loss relating to this matter and have estimated a range of potential loss. We have accrued at the low end of the range of loss, as no amount within the range is more likely to occur, and no amount within the estimated range of loss would have a material impact on our consolidated financial condition, results of operations or cash flows. With respect to a case pending against one of our subsidiaries in which there is alleged both trade secret and trademark infringement, during the quarter ended August 31, 2017, the court denied our motion for summary judgment and based on our current understanding of the claim we have determined that it is reasonably possible that we may incur a loss related to this claim; however we cannot estimate the amount or range of any potential loss.

Equity

Equity	9 Months Ended
	Feb. 28, 2018
Equity [Abstract]
Equity	NOTE 15 — The following tables illustrate the components of total equity and comprehensive income for the three months ended February 28, 2018 and 2017: (In thousands) Total RPM International Inc. Equity Noncontrolling Interest Total Equity Total equity at November 30, 2017 $ 1,606,753 $ 2,768 $ 1,609,521 Net income 40,227 361 40,588 Other Comprehensive Income: Foreign currency translation adjustments 31,101 32 31,133 Pension and other postretirement benefit liability adjustments, net of tax 2,279 2,279 Unrealized (loss) on securities, net of tax (2,380 ) (2,380 ) Unrealized (loss) on derivatives, net of tax (2,137 ) (2,137 ) Total Other Comprehensive Income, net of tax 28,863 32 28,895 Comprehensive Income 69,090 393 69,483 Dividends paid (42,794 ) (42,794 ) Other noncontrolling interest activity (517 ) (517 ) Shares repurchased and returned for taxes (2,940 ) (2,940 ) Stock based compensation expense 3,269 3,269 Total Equity at February 28, 2018 $ 1,633,378 $ 2,644 $ 1,636,022 (In thousands) Total RPM International Inc. Equity Noncontrolling Interest Total Equity Total equity at November 30, 2016 $ 1,281,432 $ 1,902 $ 1,283,334 Net income 11,928 756 12,684 Other Comprehensive Income: Foreign currency translation adjustments 16,576 16,576 Pension and other postretirement benefit liability adjustments, net of tax 3,222 3,222 Unrealized gain on securities, net of tax 2,577 2,577 Total Other Comprehensive Income, net of tax 22,375 - 22,375 Comprehensive Income 34,303 756 35,059 Dividends paid (40,076 ) (40,076 ) Other noncontrolling interest activity (153 ) (153 ) Shares repurchased and returned for taxes (429 ) (429 ) Stock based compensation expense 7,992 7,992 Total Equity at February 28, 2017 $ 1,283,222 $ 2,505 $ 1,285,727 (In thousands) Total International Inc. Equity Noncontrolling Interest Total Equity Total equity at May 31, 2017 $ 1,436,061 $ 2,639 $ 1,438,700 Net income 252,106 1,243 253,349 Other Comprehensive Income: Foreign currency translation adjustments 67,462 (9 ) 67,453 Pension and other postretirement benefit liability adjustments, net of tax 5,974 5,974 Unrealized gain on securities, net of tax 91 91 Unrealized (loss) on derivatives, net of tax (5,277 ) (5,277 ) Total Other Comprehensive Income (Loss), net of tax 68,250 (9 ) 68,241 Comprehensive Income 320,356 1,234 321,590 Dividends paid (125,672 ) (125,672 ) Other noncontrolling interest activity (1,229 ) (1,229 ) Shares repurchased and returned for taxes (15,065 ) (15,065 ) Stock based compensation expense 17,698 17,698 Total Equity at February 28, 2018 $ 1,633,378 $ 2,644 $ 1,636,022 (In thousands) Total International Inc. Equity Noncontrolling Interest Total Equity Total equity at May 31, 2016 $ 1,372,335 $ 2,413 $ 1,374,748 Net income 53,771 2,051 55,822 Other Comprehensive Income: Foreign currency translation adjustments (46,919 ) (46,919 ) Pension and other postretirement benefit liability adjustments, net of tax 12,516 12,516 Unrealized gain on securities, net of tax 3,286 3,286 Total Other Comprehensive (Loss), net of tax (31,117 ) - (31,117 ) Comprehensive Income 22,654 2,051 24,705 Dividends paid (116,680 ) (116,680 ) Other noncontrolling interest activity (1,959 ) (1,959 ) Shares repurchased and returned for taxes (20,092 ) (20,092 ) Stock based compensation expense 25,005 25,005 Total Equity at February 28, 2017 $ 1,283,222 $ 2,505 $ 1,285,727

Segment Information

Segment Information	9 Months Ended
	Feb. 28, 2018
Segment Reporting [Abstract]
Segment Information	NOTE 16 — SEGMENT INFORMATION We operate a portfolio of businesses and product lines that manufacture and sell a variety of specialty paints, protective coatings and roofing systems, sealants and adhesives. We manage our portfolio by organizing our businesses and product lines into three reportable segments: the industrial reportable segment, the consumer reportable segment and the specialty reportable segment. Within each reportable segment, we aggregate operating segments or product lines that consist of individual companies or groups of companies and product lines, which generally address common markets, share similar economic characteristics, utilize similar technologies and can share manufacturing or distribution capabilities. Our seven operating segments represent components of our business for which separate financial information is available that is utilized on a regular basis by our chief operating decision maker in determining how to allocate the assets of the company and evaluate performance. These seven operating segments are each managed by an operating segment manager, who is responsible for the day-to-day operating decisions and performance evaluation of the operating segment’s underlying businesses. Our industrial reportable segment products are sold throughout North America and also account for the majority of our international sales. Our industrial product lines are sold directly to contractors, distributors and end-users, such as industrial manufacturing facilities, public institutions and other commercial customers. The industrial reportable segment comprises three separate operating segments — Tremco Group, tremco illbruck Group and Performance Coatings Group. Products and services within this reportable segment include construction chemicals, roofing systems, weatherproofing and other sealants, and polymer flooring. Our consumer reportable segment manufactures and markets professional use and do-it-yourself (“DIY”) products for a variety of mainly consumer applications, including home improvement and personal leisure activities. Our consumer segment’s major manufacturing and distribution operations are located primarily in North America, along with a few locations in Europe and other parts of the world. Our consumer reportable segment products are primarily sold directly to mass merchandisers, home improvement centers, hardware stores, paint stores, craft shops, cosmetic companies and through distributors. This reportable segment comprises three operating segments — Rust-Oleum Group, DAP Group and SPG-Consumer Group. Products within this reportable segment include specialty, hobby and professional paints; nail enamels; caulks; adhesives; silicone sealants and wood stains. Our specialty reportable segment products are sold throughout North America and a few international locations, primarily in Europe. Our specialty product lines are sold directly to contractors, distributors and end-users, such as industrial manufacturing facilities, public institutions and other commercial customers. The specialty reportable segment is a single operating segment, which offers products that include industrial cleaners, restoration services equipment, colorants, exterior finishes, edible coatings and specialty glazes for pharmaceutical and food industries, and other specialty OEM coatings. In addition to our three reportable segments, there is a category of certain business activities and expenses, referred to as corporate/other, that does not constitute an operating segment. This category includes our corporate headquarters and related administrative expenses, results of our captive insurance companies, gains or losses on the sales of certain assets and other expenses not directly associated with any reportable segment. Assets related to the corporate/other category consist primarily of investments, prepaid expenses and headquarters’ property and equipment. These corporate and other assets and expenses reconcile reportable segment data to total consolidated income before income taxes and identifiable assets. We reflect income from our joint ventures on the equity method, and receive royalties from our licensees. The following tables reflect the results of our reportable segments consistent with our management philosophy, and represent the information we utilize, in conjunction with various strategic, operational and other financial performance criteria, in evaluating the performance of our portfolio of businesses. Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, 2018 2017 2018 2017 (In thousands) Net Sales Industrial Segment $ 569,210 $ 521,403 $ 2,001,883 $ 1,830,672 Consumer Segment 363,370 341,434 1,205,945 1,115,095 Specialty Segment 170,097 159,659 555,659 519,562 Consolidated $ 1,102,677 $ 1,022,496 $ 3,763,487 $ 3,465,329 Income (Loss) Before Income Taxes Industrial Segment $ 17,804 $ 11,705 $ 174,402 $ 151,262 Consumer Segment 29,123 29,802 146,576 (40,685 ) Specialty Segment 22,792 15,000 90,398 76,664 Corporate/Other (35,021 ) (39,510 ) (112,213 ) (128,626 ) Consolidated $ 34,698 $ 16,997 $ 299,163 $ 58,615

Subsequent Events

Subsequent Events	9 Months Ended
	Feb. 28, 2018
Subsequent Events [Abstract]
Subsequent Events	NOTE 17 — SUBSEQUENT EVENTS Subsequent to the end of our third fiscal quarter, on March 19, 2018, we acquired Miracle Sealants Company, a manufacturer of sealers, cleaners, polishes and related products primarily for tile and natural stone. The company, which is based in Arcadia, California, has annual net sales of approximately $24.0 million, and will be included in our consumer reportable segment.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)	9 Months Ended
	Feb. 28, 2018
Accounting Changes And Error Corrections [Abstract]
New Accounting Pronouncements	NEW ACCOUNTING PRONOUNCEMENTS In May 2014, the FASB issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” which establishes a comprehensive revenue recognition standard that will supersede nearly all existing revenue recognition guidance under GAAP. The new standard prescribes a five-step model for recognizing revenue, which will require significant judgment in its application. The new standard requires disclosures regarding the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Under the original issuance, the new standard would have applied to annual periods beginning after December 15, 2016, including interim periods therein. However, in August 2015, the FASB issued ASU 2015-14, which extends the standard effective date by one year and includes an option to apply the standard on the original effective date. The provisions of this ASU may be applied retrospectively to each prior reporting period presented, or on a modified retrospective basis by recognizing a cumulative catch-up transition amount at the date of initial application. We have selected the modified retrospective transition method, which we will apply upon adoption of the standard as of June 1, 2018. Given the scope of work required to implement the recognition and disclosure requirements under the new standard, we began our assessment process during fiscal 2016. Our progress to date includes a preliminary identification of areas which will require changes to policies, processes, systems or internal controls. We expect revenue recognition for our broad portfolio of products and services to remain largely unchanged. However, the guidance is expected to change the timing of revenue recognition in certain areas, including our accounting for long-term construction contracts. While these impacts are not expected to be material to our overall Consolidated Financial Statements, we do anticipate that the new disclosure requirements surrounding revenue recognition will be significant. We continue to assess all potential impacts of the guidance and given the stage of our adoption procedures as well as our normal ongoing business dynamics, our preliminary conclusions and assessments of the potential impacts on each of our different business units’ revenue streams are subject to change. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which increases lease transparency and comparability among organizations. Under the new standard, lessees will be required to recognize all assets and liabilities arising from leases on the balance sheet, with the exception of leases with a term of 12 months or less, which permits a lessee to make an accounting policy election by class of underlying asset not to recognize lease assets and liabilities. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, and early adoption is permitted. The new standard requires the recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective approach, which includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. At a minimum, total assets and total liabilities will increase in the period the ASU is adopted. At February 28, 2018, our total undiscounted future minimum payments outstanding for operating lease obligations approximated $276.0 million. In August 2016, the FASB issued ASU 2016-15, “Classification of Certain Cash Receipts and Cash Payments,” which makes a number of changes meant to add or clarify guidance on the classification of certain cash receipts and payments in the statement of cash flows. The new guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. Upon adoption, entities must apply the guidance retrospectively to all periods presented. We are currently evaluating the impact this guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-01, “Business Combinations: Clarifying the Definition of a Business,” with the objective of adding guidance to assist entities in evaluating whether transactions should be accounted for as acquisitions (disposals) of assets or of businesses. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years, with early adoption permitted. We are currently reviewing the impact this revised guidance will have on our Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, “Simplifying the Test for Goodwill Impairment,” to eliminate step two from the goodwill impairment test in order to simplify the subsequent measurement of goodwill. The guidance is effective for fiscal years beginning after December 15, 2019. Early application is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Adoption of this guidance is not expected to have a material impact on our Consolidated Financial Statements. In March 2017, the FASB issued ASU 2017-07, “Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which requires that an employer report the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The other components of net benefit cost are required to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. The guidance is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are currently reviewing the impact this guidance will have on our Consolidated Financial Statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities,” which simplifies hedge accounting through changes to both designation and measurement requirements. For hedges that qualify as highly effective, the new standard eliminates the requirement to separately measure and record hedge ineffectiveness, resulting in better alignment between the presentation of the effects of the hedging instrument and the hedged item in the financial statements. ASU No. 2017-12 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted in any interim period after issuance of the update. Our early adoption of this pronouncement during our current quarter ended November 30, 2017 did not have a material impact on our Consolidated Financial Statements. Refer to Note 6, “Derivatives and Hedging,” for further information.

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Feb. 28, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Marketable Securities by Asset Type	The following tables summarize marketable securities held at February 28, 2018 and May 31, 2017 by asset type: Available-For-Sale Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) February 28, 2018 Equity securities: Stocks - domestic $ 1,235 $ 76 $ - $ 1,311 Mutual funds - foreign 45,397 3,229 (299 ) 48,327 Mutual funds - domestic 106,443 1,874 (2,938 ) 105,379 Total equity securities 153,075 5,179 (3,237 ) 155,017 Fixed maturity: U.S. treasury and other government 22,773 29 (593 ) 22,209 Corporate bonds 532 49 (7 ) 574 Total fixed maturity securities 23,305 78 (600 ) 22,783 Total $ 176,380 $ 5,257 $ (3,837 ) $ 177,800 Available-For-Sale Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2017 Equity securities: Stocks - domestic $ 2,391 $ 76 $ - $ 2,467 Mutual funds - foreign 35,169 2,470 (204 ) 37,435 Mutual funds - domestic 102,671 2,084 (3,118 ) 101,637 Total equity securities 140,231 4,630 (3,322 ) 141,539 Fixed maturity: U.S. treasury and other government 22,176 120 (177 ) 22,119 Corporate bonds 706 97 (6 ) 797 Total fixed maturity securities 22,882 217 (183 ) 22,916 Total $ 163,113 $ 4,847 $ (3,505 ) $ 164,455
Summary of Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive (Loss), Aggregated by Length of Time Investments	Summarized below are the securities we held at February 28, 2018 and May 31, 2017 that were in an unrealized loss position and that were included in accumulated other comprehensive (loss), aggregated by the length of time the investments had been in that position: February 28, 2018 May 31, 2017 (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Total investments with unrealized losses $ 93,287 $ (3,837 ) $ 59,987 $ (3,505 ) Unrealized losses with a loss position for less than 12 months 56,775 (795 ) 40,854 (2,983 ) Unrealized losses with a loss position for more than 12 months 36,512 (3,042 ) 19,133 (522 )
Net Carrying Values of Debt Securities by Contractual Maturity	The net carrying values of debt securities at February 28, 2018, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties. (In thousands) Amortized Fair Due: Less than one year $ 4,894 $ 4,856 One year through five years 14,180 13,825 Six years through ten years 3,137 2,977 After ten years 1,094 1,125 $ 23,305 $ 22,783

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Feb. 28, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis and Categorized using Fair Value Hierarchy	The following tables present our assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. (In thousands) Quoted in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at February 28, 2018 U.S. Treasury and other government $ - $ 22,209 $ - $ 22,209 Corporate bonds 574 574 Stocks - domestic 1,311 1,311 Mutual funds - foreign 48,327 48,327 Mutual funds - domestic 105,379 105,379 Contingent consideration (14,653 ) (14,653 ) Total $ 1,311 $ 176,489 $ (14,653 ) $ 163,147 (In thousands) Quoted in Active Markets for Identical (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2017 U.S. Treasury and other government $ - $ 22,119 $ - $ 22,119 Corporate bonds 797 797 Stocks - domestic 2,467 2,467 Mutual funds - foreign 37,435 37,435 Mutual funds - domestic 101,637 101,637 Contingent consideration (17,979 ) (17,979 ) Total $ 2,467 $ 161,988 $ (17,979 ) $ 146,476
Fair Value and Carrying Value of Financial Instruments and Long-Term Debt	Based on the analysis performed, the fair value and the carrying value of our financial instruments and long-term debt as of February 28, 2018 and May 31, 2017 are as follows: At February 28, 2018 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 264,386 $ 264,386 Marketable equity securities 155,017 155,017 Marketable debt securities 22,783 22,783 Long-term debt, including current portion 2,183,425 2,243,062 At May 31, 2017 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 350,497 $ 350,497 Marketable equity securities 141,539 141,539 Marketable debt securities 22,916 22,916 Long-term debt, including current portion 2,090,082 2,243,167

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	9 Months Ended
	Feb. 28, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Fair Values of Qualifying and Non-Qualifying Instruments Used in Hedging Transactions	The fair values of qualifying and non-qualifying instruments used in hedging transactions as of February 28, 2018 and May 31, 2017 are as follows: (in thousands) Fair Value Derivatives Designated as Hedging Instruments Balance Sheet Location February 28, 2018 May 31, 2017 Assets: Foreign Currency Exchange (Cash Flow) Other Current Assets 304 15 Cross Currency Swap (Net Investment) Other Current Assets 1,717 - Cross Currency Swap (Net Investment) Other Assets (Long-Term) 1,009 - Liabilities: Interest Rate Swap (Fair Value) Other Accrued Liabilities 117 - Cross Currency Swap (Net Investment) Other Long-Term Liabilities 8,188 - Interest Rate Swap (Fair Value) Other Long-Term Liabilities 2,923 - (in thousands) Fair Value Derivatives Not Designated as Hedging Instruments Balance Sheet Location February 28, 2018 May 31, 2017 Assets: Foreign Currency Exchange Other Current Assets 2,926 24 Liabilities: Foreign Currency Exchange Other Accrued Liabilities 64 -

Investment (Income), Net (Table

Investment (Income), Net (Tables)	9 Months Ended
	Feb. 28, 2018
Other Income And Expenses [Abstract]
Investment (Income), Net	Investment (income), net, consists of the following components: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands) 2018 2017 2018 2017 Interest (income) $ (1,454 ) $ (1,599 ) $ (3,645 ) $ (3,832 ) Net (gain) on sale of marketable securities (1,935 ) (1,640 ) (6,833 ) (5,338 ) Other-than-temporary impairment on securities 17 420 Dividend (income) (2,082 ) (405 ) (3,185 ) (1,131 ) Investment (income), net $ (5,471 ) $ (3,627 ) $ (13,663 ) $ (9,881 )

Other (Income) Expense, Net (Ta

Other (Income) Expense, Net (Tables)	9 Months Ended
	Feb. 28, 2018
Other Income And Expenses [Abstract]
Other (Income) Expense, Net	Other (income) expense, net, consists of the following components: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands) 2018 2017 2018 2017 Royalty expense, net $ 148 $ 744 $ 238 $ 2,080 (Income) related to unconsolidated equity affiliates (313 ) (242 ) (830 ) (779 ) Other (income) expense, net $ (165 ) $ 502 $ (592 ) $ 1,301

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Feb. 28, 2018
Inventory Disclosure [Abstract]
Major Classes of Inventories, Net of Reserves	Inventories, net of reserves, were composed of the following major classes: February 28, 2018 May 31, 2017 (In thousands) Raw material and supplies $ 290,257 $ 248,426 Finished goods 640,337 539,771 Total Inventory, Net of Reserves $ 930,594 $ 788,197

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Feb. 28, 2018
Earnings Per Share [Abstract]
Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share	The following table sets forth the reconciliation of the numerator and denominator of basic and diluted earnings per share, as calculated using the two-class method for the three and nine month periods ended February 28, 2018 and 2017. For the three months ended February 28, 2018 and 2017, and the nine months ended February 28, 2017, basic weighted-average shares outstanding and basic net income available to common shareholders and basic weighted average common shares were used in calculating diluted earnings per share under the two-class method, as that method resulted in the most-dilutive earnings per share. Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, (In thousands, except per share amounts) 2018 2017 2018 2017 Numerator for earnings per share: Net income attributable to RPM International Inc. stockholders $ 40,227 $ 11,928 $ 252,106 $ 53,771 Less: Allocation of earnings and dividends to participating securities (530 ) (232 ) (3,373 ) (847 ) Net income available to common shareholders - basic 39,697 11,696 248,733 52,924 Add: Undistributed earnings reallocated to unvested shareholders 7 Add: Income effect of contingently issuable shares 4,351 Net income available to common shareholders - diluted $ 39,697 $ 11,696 $ 253,091 $ 52,924 Denominator for basic and diluted earnings per share: Basic weighted average common shares 131,178 130,677 131,195 130,657 Average diluted options 540 Additional shares issuable assuming conversion of convertible securities (1) 3,922 Total shares for diluted earnings per share (2) 131,178 130,677 135,657 130,657 Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders: Basic Earnings Per Share of Common Stock $ 0.30 $ 0.09 $ 1.90 $ 0.41 Diluted Earnings Per Share of Common Stock $ 0.30 $ 0.09 $ 1.87 $ 0.41 (1) Represents the number of shares that would be issued if our contingently convertible notes were converted. We include these shares in the calculation of diluted EPS as the conversion of the notes may be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. (2) Restricted shares totaling 48,212 for the three and nine months ended February 28, 2018 were excluded from the calculation of diluted earnings per share because the grant price of the restricted shares exceeded the average market price of the shares during the period and their effect, accordingly, would have been anti-dilutive. There were no restricted shares identified as being anti-dilutive for the three and nine months ended February 28, 2017. In addition, stock appreciation rights (SARs) totaling 600,000 for the three and nine months ended February 28, 2018 and 2017 were excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive.

Pension Plans (Tables)

Pension Plans (Tables)	9 Months Ended
	Feb. 28, 2018
Compensation And Retirement Disclosure [Abstract]
Retirement-Related Benefit Plans' Impact on Income Before Income Taxes	The following tables provide the retirement-related benefit plans’ impact on income before income taxes for the three and nine month periods ended February 28, 2018 and 2017: U.S. Plans Non-U.S. Plans Three Months Ended Three Months Ended February 28, February 28, February 28, February 28, Pension Benefits 2018 2017 2018 2017 (In thousands) Service cost $ 9,465 $ 9,401 $ 1,175 $ 1,127 Interest cost 4,379 4,331 1,145 1,224 Expected return on plan assets (8,086 ) (6,252 ) (1,978 ) (1,886 ) Amortization of: Prior service cost (credit) 29 54 (6 ) Net actuarial losses recognized 3,618 5,540 451 573 Net Periodic Benefit Cost $ 9,405 $ 13,074 $ 787 $ 1,038 U.S. Plans Non-U.S. Plans Three Months Ended Three Months Ended February 28, February 28, February 28, February 28, Postretirement Benefits 2018 2017 2018 2017 (In thousands) Service cost $ - $ - $ 311 $ 284 Interest cost 43 57 224 222 Amortization of: Prior service (credit) (55 ) (58 ) Net actuarial losses recognized 6 79 60 Net Periodic Benefit (Credit) Cost $ (6 ) $ (1 ) $ 614 $ 566 U.S. Plans Non-U.S. Plans Nine Months Ended Nine Months Ended February 28, February 28, February 28, February 28, Pension Benefits 2018 2017 2018 2017 (In thousands) Service cost $ 28,395 $ 28,203 $ 3,525 $ 3,381 Interest cost 13,137 12,993 3,435 3,672 Expected return on plan assets (24,258 ) (18,756 ) (5,934 ) (5,658 ) Amortization of: Prior service cost 87 162 (18 ) - Net actuarial losses recognized 10,854 16,620 1,353 1,719 Net Periodic Benefit Cost $ 28,215 $ 39,222 $ 2,361 $ 3,114 U.S. Plans Non-U.S. Plans Nine Months Ended Nine Months Ended February 28, February 28, February 28, February 28, Postretirement Benefits 2018 2017 2018 2017 (In thousands) Service cost $ - $ - $ 933 $ 852 Interest cost 129 171 672 666 Amortization of: Prior service (credit) (165 ) (174 ) - - Net actuarial losses recognized 18 - 237 180 Net Periodic Benefit (Credit) Cost $ (18 ) $ (3 ) $ 1,842 $ 1,698

Contingencies and Other Accru34

Contingencies and Other Accrued Losses (Tables)	9 Months Ended
	Feb. 28, 2018
Commitments And Contingencies Disclosure [Abstract]
Changes in Accrued Warranty Balances	The following table includes the changes in our accrued warranty balances: Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, 2018 2017 2018 2017 (In thousands) Beginning Balance $ 14,457 $ 15,954 $ 19,149 $ 13,314 Deductions (1) (5,776 ) (3,662 ) (20,447 ) (12,094 ) Provision charged to expense 2,540 7,308 12,519 18,380 Ending Balance $ 11,221 $ 19,600 $ 11,221 $ 19,600 (1) Primarily claims paid during the year.

Equity (Tables)

Equity (Tables)	9 Months Ended
	Feb. 28, 2018
Equity [Abstract]
Components of Total Equity and Comprehensive Income	The following tables illustrate the components of total equity and comprehensive income for the three months ended February 28, 2018 and 2017: (In thousands) Total RPM International Inc. Equity Noncontrolling Interest Total Equity Total equity at November 30, 2017 $ 1,606,753 $ 2,768 $ 1,609,521 Net income 40,227 361 40,588 Other Comprehensive Income: Foreign currency translation adjustments 31,101 32 31,133 Pension and other postretirement benefit liability adjustments, net of tax 2,279 2,279 Unrealized (loss) on securities, net of tax (2,380 ) (2,380 ) Unrealized (loss) on derivatives, net of tax (2,137 ) (2,137 ) Total Other Comprehensive Income, net of tax 28,863 32 28,895 Comprehensive Income 69,090 393 69,483 Dividends paid (42,794 ) (42,794 ) Other noncontrolling interest activity (517 ) (517 ) Shares repurchased and returned for taxes (2,940 ) (2,940 ) Stock based compensation expense 3,269 3,269 Total Equity at February 28, 2018 $ 1,633,378 $ 2,644 $ 1,636,022 (In thousands) Total RPM International Inc. Equity Noncontrolling Interest Total Equity Total equity at November 30, 2016 $ 1,281,432 $ 1,902 $ 1,283,334 Net income 11,928 756 12,684 Other Comprehensive Income: Foreign currency translation adjustments 16,576 16,576 Pension and other postretirement benefit liability adjustments, net of tax 3,222 3,222 Unrealized gain on securities, net of tax 2,577 2,577 Total Other Comprehensive Income, net of tax 22,375 - 22,375 Comprehensive Income 34,303 756 35,059 Dividends paid (40,076 ) (40,076 ) Other noncontrolling interest activity (153 ) (153 ) Shares repurchased and returned for taxes (429 ) (429 ) Stock based compensation expense 7,992 7,992 Total Equity at February 28, 2017 $ 1,283,222 $ 2,505 $ 1,285,727 (In thousands) Total International Inc. Equity Noncontrolling Interest Total Equity Total equity at May 31, 2017 $ 1,436,061 $ 2,639 $ 1,438,700 Net income 252,106 1,243 253,349 Other Comprehensive Income: Foreign currency translation adjustments 67,462 (9 ) 67,453 Pension and other postretirement benefit liability adjustments, net of tax 5,974 5,974 Unrealized gain on securities, net of tax 91 91 Unrealized (loss) on derivatives, net of tax (5,277 ) (5,277 ) Total Other Comprehensive Income (Loss), net of tax 68,250 (9 ) 68,241 Comprehensive Income 320,356 1,234 321,590 Dividends paid (125,672 ) (125,672 ) Other noncontrolling interest activity (1,229 ) (1,229 ) Shares repurchased and returned for taxes (15,065 ) (15,065 ) Stock based compensation expense 17,698 17,698 Total Equity at February 28, 2018 $ 1,633,378 $ 2,644 $ 1,636,022 (In thousands) Total International Inc. Equity Noncontrolling Interest Total Equity Total equity at May 31, 2016 $ 1,372,335 $ 2,413 $ 1,374,748 Net income 53,771 2,051 55,822 Other Comprehensive Income: Foreign currency translation adjustments (46,919 ) (46,919 ) Pension and other postretirement benefit liability adjustments, net of tax 12,516 12,516 Unrealized gain on securities, net of tax 3,286 3,286 Total Other Comprehensive (Loss), net of tax (31,117 ) - (31,117 ) Comprehensive Income 22,654 2,051 24,705 Dividends paid (116,680 ) (116,680 ) Other noncontrolling interest activity (1,959 ) (1,959 ) Shares repurchased and returned for taxes (20,092 ) (20,092 ) Stock based compensation expense 25,005 25,005 Total Equity at February 28, 2017 $ 1,283,222 $ 2,505 $ 1,285,727

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Feb. 28, 2018
Segment Reporting [Abstract]
Results of Reportable Segments	The following tables reflect the results of our reportable segments consistent with our management philosophy, and represent the information we utilize, in conjunction with various strategic, operational and other financial performance criteria, in evaluating the performance of our portfolio of businesses. Three Months Ended Nine Months Ended February 28, February 28, February 28, February 28, 2018 2017 2018 2017 (In thousands) Net Sales Industrial Segment $ 569,210 $ 521,403 $ 2,001,883 $ 1,830,672 Consumer Segment 363,370 341,434 1,205,945 1,115,095 Specialty Segment 170,097 159,659 555,659 519,562 Consolidated $ 1,102,677 $ 1,022,496 $ 3,763,487 $ 3,465,329 Income (Loss) Before Income Taxes Industrial Segment $ 17,804 $ 11,705 $ 174,402 $ 151,262 Consumer Segment 29,123 29,802 146,576 (40,685 ) Specialty Segment 22,792 15,000 90,398 76,664 Corporate/Other (35,021 ) (39,510 ) (112,213 ) (128,626 ) Consolidated $ 34,698 $ 16,997 $ 299,163 $ 58,615

Consolidation, Noncontrolling37

Consolidation, Noncontrolling Interests and Basis of Presentation - Additional Information (Detail)	Feb. 28, 2018
Accounting Policies [Abstract]
Percentage of controlled subsidiary's earnings	100.00%

New Accounting Pronouncements -

New Accounting Pronouncements - Additional Information (Detail) $ in Millions	Feb. 28, 2018USD ($)
Accounting Policies [Abstract]
Total undiscounted future minimum payments outstanding for operating lease obligations	$ 276

Goodwill and Other Intangible39

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Feb. 28, 2017	Feb. 28, 2017	May 31, 2017	May 31, 2009	Feb. 28, 2018
Goodwill And Intangible Assets [Line Items]
Impairment charges related to carrying value of goodwill and other intangible assets	$ 4,900	$ 193,198
Goodwill impairment loss			$ 140,500
Impairment losses for other intangible assets			52,600
Accumulated impairment losses	155,400	155,400			$ 156,300
Other intangible asset accumulated impairment losses, gross	$ 53,200	$ 53,200			$ 53,600
Industrial Segment
Goodwill And Intangible Assets [Line Items]
Accumulated impairment losses				$ 14,900
Intangible asset impairment loss				$ 600
Formulae
Goodwill And Intangible Assets [Line Items]
Impairment losses for other intangible assets			15,300
Customer-related Intangibles
Goodwill And Intangible Assets [Line Items]
Impairment losses for other intangible assets			30,100
Other Intangibles
Goodwill And Intangible Assets [Line Items]
Impairment losses for other intangible assets			200
Indefinite-lived Trademarks
Goodwill And Intangible Assets [Line Items]
Impairment losses for other intangible assets			$ 7,000

Summary of Marketable Securitie

Summary of Marketable Securities by Asset Type (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	$ 176,380	$ 163,113
Available-for-Sale Securities, Gross Unrealized Gains	5,257	4,847
Available-for-Sale Securities, Gross Unrealized Losses	(3,837)	(3,505)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	177,800	164,455
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	153,075	140,231
Available-for-Sale Securities, Gross Unrealized Gains	5,179	4,630
Available-for-Sale Securities, Gross Unrealized Losses	(3,237)	(3,322)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	155,017	141,539
Equity securities | Stocks | Domestic
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	1,235	2,391
Available-for-Sale Securities, Gross Unrealized Gains	76	76
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	1,311	2,467
Equity securities | Mutual funds | Domestic
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	106,443	102,671
Available-for-Sale Securities, Gross Unrealized Gains	1,874	2,084
Available-for-Sale Securities, Gross Unrealized Losses	(2,938)	(3,118)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	105,379	101,637
Equity securities | Mutual funds | Foreign
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	45,397	35,169
Available-for-Sale Securities, Gross Unrealized Gains	3,229	2,470
Available-for-Sale Securities, Gross Unrealized Losses	(299)	(204)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	48,327	37,435
Fixed maturity
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	23,305	22,882
Available-for-Sale Securities, Gross Unrealized Gains	78	217
Available-for-Sale Securities, Gross Unrealized Losses	(600)	(183)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	22,783	22,916
Fixed maturity | U.S. Treasury and other government
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	22,773	22,176
Available-for-Sale Securities, Gross Unrealized Gains	29	120
Available-for-Sale Securities, Gross Unrealized Losses	(593)	(177)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	22,209	22,119
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale Securities, Amortized Cost	532	706
Available-for-Sale Securities, Gross Unrealized Gains	49	97
Available-for-Sale Securities, Gross Unrealized Losses	(7)	(6)
Available-for-Sale Securities, Fair Value (Net Carrying Amount)	$ 574	$ 797

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016	May 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, current	$ 95,900,000			$ 95,900,000			$ 89,500,000
Available-for-sale securities, long-term	81,900,000			81,900,000			$ 75,000,000
Gross gains realized on sales of investments	$ 2,600,000	$ 1,700,000		8,600,000	$ 6,400,000
Gross realized losses on sales of investments		$ 700,000	$ 100,000	$ 1,800,000	1,100,000
Losses recognized for securities deemed to have other-than-temporary impairments					$ 0	$ 400,000
Maximum
Schedule of Available-for-sale Securities [Line Items]
Investments with unrealized loss, percentage of fair values less than original cost	15.00%			15.00%

Summary of Securities in Unreal

Summary of Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive (Loss), Aggregated by Length of Time Investments (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Investments Debt And Equity Securities [Abstract]
Total investments with unrealized losses, fair value	$ 93,287	$ 59,987
Unrealized losses with a loss position for less than 12 months, fair value	56,775	40,854
Unrealized losses with a loss position for more than 12 months, fair value	36,512	19,133
Total investments with unrealized losses, gross unrealized losses	(3,837)	(3,505)
Unrealized losses with a loss position for less than 12 months, gross unrealized losses	(795)	(2,983)
Unrealized losses with a loss position for more than 12 months, gross unrealized losses	$ (3,042)	$ (522)

Net Carrying Values of Debt Sec

Net Carrying Values of Debt Securities by Contractual Maturity (Detail) $ in Thousands	Feb. 28, 2018USD ($)
Available-for-Sale Securities, amortized cost
Less than one year, amortized cost	$ 4,894
One year through five years, amortized cost	14,180
Six years through ten years, amortized cost	3,137
After ten years, amortized cost	1,094
Available-for-sale Debt Securities, Amortized Cost Basis, Total	23,305
Available-for-Sale Securities, fair value
Less than one year, fair value	4,856
One year through five years, fair value	13,825
Six years through ten years, fair value	2,977
After ten years, fair value	1,125
Marketable debt securities, carrying value	$ 22,783

Assets and Liabilities Measured

Assets and Liabilities Measured at Fair Value on Recurring Basis and Categorized using Fair Value Hierarchy (Detail) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) at fair value	$ 163,147	$ 146,476
U.S. Treasury and other government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	22,209	22,119
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	574	797
Domestic | Stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	1,311	2,467
Mutual funds | Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	105,379	101,637
Mutual funds | Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	48,327	37,435
Contingent consideration liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	(14,653)	(17,979)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) at fair value	1,311	2,467
Quoted Prices in Active Markets for Identical Assets (Level 1) | Domestic | Stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	1,311	2,467
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) at fair value	176,489	161,988
Significant Other Observable Inputs (Level 2) | U.S. Treasury and other government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	22,209	22,119
Significant Other Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	574	797
Significant Other Observable Inputs (Level 2) | Mutual funds | Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	105,379	101,637
Significant Other Observable Inputs (Level 2) | Mutual funds | Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on recurring basis	48,327	37,435
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) at fair value	(14,653)	(17,979)
Significant Unobservable Inputs (Level 3) | Contingent consideration liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	$ (14,653)	$ (17,979)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Fair Value Disclosures [Abstract]
Settlements of contingent consideration obligations	$ 3.8	$ 4.2
Accrued contingent payments related to new acquisitions		$ 6.9
Increased our accrual for fair value adjustments	$ 0.5

Fair Value and Carrying Value o

Fair Value and Carrying Value of Financial Instruments and Long-Term Debt (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	$ 177,800	$ 164,455
Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	155,017	141,539
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	264,386	350,497
Long-term debt, including current portion	2,183,425	2,090,082
Carrying Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	155,017	141,539
Carrying Value | Debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	22,783	22,916
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	264,386	350,497
Long-term debt, including current portion	2,243,062	2,243,167
Fair Value | Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	155,017	141,539
Fair Value | Debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Marketable securities	$ 22,783	$ 22,916

Derivatives and Hedging - Addit

Derivatives and Hedging - Additional Information (Detail)	Oct. 31, 2017USD ($)CrossCurrencySwap	Feb. 28, 2018USD ($)ForwardContract	Oct. 31, 2017EUR (€)CrossCurrencySwap	May 31, 2017USD ($)
Derivatives Not Designated as Hedges
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of foreign currency forward contracts held | ForwardContract		3
Forward Contracts Held to Sell International Currencies
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount		$ 11,600,000		$ 9,800,000
Forward Contracts Held to Purchase Foreign Currencies | Derivatives Not Designated as Hedges
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount		$ 158,100,000		$ 49,400,000
Net Investment Hedge
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of cross currency swaps executed | CrossCurrencySwap	2		2
Notional amount	$ 100,000,000		€ 85,250,000
Derivative instruments maturity date	2022-11

Derivatives and Hedging - Sched

Derivatives and Hedging - Schedule of Fair Values of Qualifying and Non-Qualifying Instruments Used in Hedging Transactions (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Derivatives Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives assets	$ 304	$ 15
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives assets	1,717
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Assets (Long-Term)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives assets	1,009
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Long-Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	8,188
Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Accrued Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	117
Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Long-Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	2,923
Derivatives Not Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives assets	2,926	$ 24
Derivatives Not Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Accrued Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	$ 64

Investment (Income), Net (Detai

Investment (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Other Income And Expenses [Abstract]
Interest (income)	$ (1,454)	$ (1,599)	$ (3,645)	$ (3,832)
Net (gain) on sale of marketable securities	(1,935)	(1,640)	(6,833)	(5,338)
Other-than-temporary impairment on securities		17		420
Dividend (income)	(2,082)	(405)	(3,185)	(1,131)
Investment (income), net	$ (5,471)	$ (3,627)	$ (13,663)	$ (9,881)

Other (Income) Expense, Net (De

Other (Income) Expense, Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Other Income And Expenses [Abstract]
Royalty expense, net	$ 148	$ 744	$ 238	$ 2,080
(Income) related to unconsolidated equity affiliates	(313)	(242)	(830)	(779)
Other (income) expense, net	$ (165)	$ 502	$ (592)	$ 1,301

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	Jan. 01, 2018	Dec. 22, 2017	Dec. 21, 2017	Feb. 28, 2018	Nov. 30, 2017	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Income Tax Disclosure [Abstract]
Corporate income tax rate		21.00%	35.00%
Corporate tax rate reduction effective date	Jan. 1, 2018
Percentage of blended rate	29.20%
Discrete tax expense (benefit)				$ (1.4)	$ (27)		$ (1.4)
Provisional income tax expense (benefit)							(24.1)
Provisional income tax benefit for the partial reversal of existing deferred tax liabilities				44.1			44.1
Partially offset provisional charge for the transition tax on previously deferred foreign earnings							66.8
Provisional deferred tax liability adjustment				$ 44.1			$ 44.1
Effective income tax expense rate				(17.00%)		25.40%	15.30%	4.80%
Effective income tax rate excluding provisional (benefit)				(12.90%)			15.80%
Favorable discrete adjustment for excess tax benefits related to equity compensation								$ 11.5
Unremitted foreign earnings					$ 64.1
Deferred income tax liability				$ 20			$ 20
Preliminary estimate of foreign earnings, not considered to be permanently reinvested				$ 446			$ 446

Major Classes of Inventories, N

Major Classes of Inventories, Net of Reserves (Detail) - USD ($) $ in Thousands	Feb. 28, 2018	May 31, 2017
Inventory Disclosure [Abstract]
Raw material and supplies	$ 290,257	$ 248,426
Finished goods	640,337	539,771
Total Inventory, Net of Reserves	$ 930,594	$ 788,197

Stock Repurchase Program - Addi

Stock Repurchase Program - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Stock Repurchase Programs [Line Items]
Authorization of stock repurchase program			Jan. 8, 2008
Shares repurchased	0	0	0	0
Minimum
Stock Repurchase Programs [Line Items]
Shares authorized to be repurchased, per year	1,000,000		1,000,000
Maximum
Stock Repurchase Programs [Line Items]
Shares authorized to be repurchased, per year	2,000,000		2,000,000

Reconciliation of Numerator and

Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Numerator for earnings per share:
Net income attributable to RPM International Inc. stockholders		$ 40,227	$ 11,928	$ 252,106	$ 53,771
Less: Allocation of earnings and dividends to participating securities		(530)	(232)	(3,373)	(847)
Net income available to common shareholders - basic		39,697	11,696	248,733	52,924
Add: Undistributed earnings reallocated to unvested shareholders				7
Add: Income effect of contingently issuable shares				4,351
Net income available to common shareholders - diluted		$ 39,697	$ 11,696	$ 253,091	$ 52,924
Denominator for basic and diluted earnings per share:
Basic weighted average common shares		131,178	130,677	131,195	130,657
Average diluted options				540
Additional shares issuable assuming conversion of convertible securities	[1]			3,922
Total shares for diluted earnings per share	[2]	131,178	130,677	135,657	130,657
Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic Earnings Per Share of Common Stock		$ 0.30	$ 0.09	$ 1.90	$ 0.41
Diluted Earnings Per Share of Common Stock		$ 0.30	$ 0.09	$ 1.87	$ 0.41
[1]	Represents the number of shares that would be issued if our contingently convertible notes were converted. We include these shares in the calculation of diluted EPS as the conversion of the notes may be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock.
[2]	Restricted shares totaling 48,212 for the three and nine months ended February 28, 2018 were excluded from the calculation of diluted earnings per share because the grant price of the restricted shares exceeded the average market price of the shares during the period and their effect, accordingly, would have been anti-dilutive. There were no restricted shares identified as being anti-dilutive for the three and nine months ended February 28, 2017. In addition, stock appreciation rights (SARs) totaling 600,000 for the three and nine months ended February 28, 2018 and 2017 were excluded from the calculation of diluted earnings per share as their effect would have been anti-dilutive.

Reconciliation of Numerator a55

Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Restricted shares
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted earnings per share	48,212	0	48,212	0
Stock appreciation rights (SARs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted earnings per share	600,000	600,000	600,000	600,000

Retirement-Related Benefit Plan

Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Pension Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 9,465	$ 9,401	$ 28,395	$ 28,203
Interest cost	4,379	4,331	13,137	12,993
Expected return on plan assets	(8,086)	(6,252)	(24,258)	(18,756)
Amortization of Prior service cost (credit)	29	54	87	162
Amortization of Net actuarial losses recognized	3,618	5,540	10,854	16,620
Net Periodic Benefit (Credit) Cost	9,405	13,074	28,215	39,222
Pension Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,175	1,127	3,525	3,381
Interest cost	1,145	1,224	3,435	3,672
Expected return on plan assets	(1,978)	(1,886)	(5,934)	(5,658)
Amortization of Prior service cost (credit)	(6)		(18)
Amortization of Net actuarial losses recognized	451	573	1,353	1,719
Net Periodic Benefit (Credit) Cost	787	1,038	2,361	3,114
Postretirement Benefits | U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	43	57	129	171
Amortization of Prior service cost (credit)	(55)	(58)	(165)	(174)
Amortization of Net actuarial losses recognized	6		18
Net Periodic Benefit (Credit) Cost	(6)	(1)	(18)	(3)
Postretirement Benefits | Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	311	284	933	852
Interest cost	224	222	672	666
Amortization of Net actuarial losses recognized	79	60	237	180
Net Periodic Benefit (Credit) Cost	$ 614	$ 566	$ 1,842	$ 1,698

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail) - Pension Benefits - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2018	May 31, 2017
U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution to retirement plans in the next fiscal year		$ 1
Additional contribution to pension plans in the current	$ 52.8
Contribution to retirement plans in the current remaining fiscal year	$ 53.8
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution to retirement plans in the next fiscal year		$ 7

Changes in Accrued Warranty Bal

Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Commitments And Contingencies Disclosure [Abstract]
Beginning Balance		$ 14,457	$ 15,954	$ 19,149	$ 13,314
Deductions	[1]	(5,776)	(3,662)	(20,447)	(12,094)
Provision charged to expense		2,540	7,308	12,519	18,380
Ending Balance		$ 11,221	$ 19,600	$ 11,221	$ 19,600
[1]	Primarily claims paid during the year.

Components of Total Equity and

Components of Total Equity and Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Stockholders Equity Note [Line Items]
Total equity, beginning of period	$ 1,609,521	$ 1,283,334	$ 1,438,700	$ 1,374,748
Net income	40,588	12,684	253,349	55,822
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	31,133	16,576	67,453	(46,919)
Pension and other postretirement benefit liability adjustments, net of tax	2,279	3,222	5,974	12,516
Unrealized (loss) on securities, net of tax	(2,380)	2,577	91	3,286
Unrealized (loss) on derivatives, net of tax	(2,137)		(5,277)
Total other comprehensive income (loss)	28,895	22,375	68,241	(31,117)
Total Comprehensive Income	69,483	35,059	321,590	24,705
Dividends paid	(42,794)	(40,076)	(125,672)	(116,680)
Other noncontrolling interest activity	(517)	(153)	(1,229)	(1,959)
Shares repurchased and returned for taxes	(2,940)	(429)	(15,065)	(20,092)
Stock based compensation expense	3,269	7,992	17,698	25,005
Total Equity, end of period	1,636,022	1,285,727	1,636,022	1,285,727
Total RPM International Inc. Equity
Stockholders Equity Note [Line Items]
Total equity, beginning of period	1,606,753	1,281,432	1,436,061	1,372,335
Net income	40,227	11,928	252,106	53,771
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	31,101	16,576	67,462	(46,919)
Pension and other postretirement benefit liability adjustments, net of tax	2,279	3,222	5,974	12,516
Unrealized (loss) on securities, net of tax	(2,380)	2,577	91	3,286
Unrealized (loss) on derivatives, net of tax	(2,137)		(5,277)
Total other comprehensive income (loss)	28,863	22,375	68,250	(31,117)
Total Comprehensive Income	69,090	34,303	320,356	22,654
Dividends paid	(42,794)	(40,076)	(125,672)	(116,680)
Shares repurchased and returned for taxes	(2,940)	(429)	(15,065)	(20,092)
Stock based compensation expense	3,269	7,992	17,698	25,005
Total Equity, end of period	1,633,378	1,283,222	1,633,378	1,283,222
Noncontrolling Interest
Stockholders Equity Note [Line Items]
Total equity, beginning of period	2,768	1,902	2,639	2,413
Net income	361	756	1,243	2,051
Other Comprehensive Income (Loss):
Foreign currency translation adjustments	32		(9)
Total other comprehensive income (loss)	32		(9)
Total Comprehensive Income	393	756	1,234	2,051
Other noncontrolling interest activity	(517)	(153)	(1,229)	(1,959)
Total Equity, end of period	$ 2,644	$ 2,505	$ 2,644	$ 2,505

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Feb. 28, 2018Segment
Segment Reporting [Abstract]
Number of reportable segments	3
Number of operating segments	7

Results of Reportable Segments

Results of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 1,102,677	$ 1,022,496	$ 3,763,487	$ 3,465,329
Income (Loss) Before Income Taxes	34,698	16,997	299,163	58,615
Operating Segments | Industrial Segment
Segment Reporting Information [Line Items]
Net Sales	569,210	521,403	2,001,883	1,830,672
Income (Loss) Before Income Taxes	17,804	11,705	174,402	151,262
Operating Segments | Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	363,370	341,434	1,205,945	1,115,095
Income (Loss) Before Income Taxes	29,123	29,802	146,576	(40,685)
Operating Segments | Specialty Segment
Segment Reporting Information [Line Items]
Net Sales	170,097	159,659	555,659	519,562
Income (Loss) Before Income Taxes	22,792	15,000	90,398	76,664
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes	$ (35,021)	$ (39,510)	$ (112,213)	$ (128,626)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 19, 2018	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Subsequent Event [Line Items]
Net sales		$ 1,102,677	$ 1,022,496	$ 3,763,487	$ 3,465,329
Operating Segments | Consumer Segment
Subsequent Event [Line Items]
Net sales		$ 363,370	$ 341,434	$ 1,205,945	$ 1,115,095
Subsequent Event | Operating Segments | Consumer Segment | Arcadia, California
Subsequent Event [Line Items]
Net sales	$ 24,000