RPM International (RPM) 10-K26 Jul 212021 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	May 31, 2021	Jul. 22, 2021	Nov. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	May 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Trading Symbol	RPM
Entity Registrant Name	RPM INTERNATIONAL INC.
Entity Central Index Key	0000110621
Current Fiscal Year End Date	--05-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
ICFR Auditor Attestation Flag	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		129,774,039
Entity Public Float			$ 11,309,677,876
Entity File Number	1-14187
Entity Tax Identification Number	02-0642224
Entity Address, Address Line One	P.O. Box 777
Entity Address, Address Line Two	2628 Pearl Road
Entity Address, City or Town	Medina
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44258
City Area Code	330
Local Phone Number	273-5090
Entity Incorporation, State or Country Code	DE
Document Annual Report	true
Document Transition Report	false
Security Exchange Name	NYSE
Title of 12(b) Security	Common Stock, par value $0.01
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Portions of the definitive Proxy Statement to be used in connection with the Registrant’s Annual Meeting of Stockholders to be held on October 7, 2021 (the “2021 Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K. Except as otherwise stated, the information contained in this Annual Report on Form 10-K is as of May 31, 2021.

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Current Assets
Cash and cash equivalents	$ 246,704	$ 233,416
Trade accounts receivable (less allowances of $55,922 and $55,847, respectively)	1,280,806	1,137,957
Inventories	938,095	810,448
Prepaid expenses and other current assets	316,399	241,608
Total current assets	2,782,004	2,423,429
Property, Plant and Equipment, at Cost	1,967,482	1,755,190
Allowance for depreciation	(1,002,300)	(905,504)
Property, plant and equipment, net	965,182	849,686
Other Assets
Goodwill	1,345,754	1,250,066
Other intangible assets, net of amortization	628,693	584,380
Operating lease right-of-use assets	300,827	284,491
Deferred income taxes	26,804	30,894
Other	203,705	208,008
Total other assets	2,505,783	2,357,839
Total Assets	6,252,969	5,630,954
Current Liabilities
Accounts payable	717,176	535,311
Current portion of long-term debt	1,282	80,890
Accrued compensation and benefits	258,380	185,531
Accrued losses	29,054	20,021
Other accrued liabilities	325,522	271,827
Total current liabilities	1,331,414	1,093,580
Long-Term Liabilities
Long-term debt, less current maturities	2,378,544	2,458,290
Operating lease liabilities	257,415	244,691
Other long-term liabilities	436,176	510,175
Deferred income taxes	106,395	59,555
Total long-term liabilities	3,178,530	3,272,711
Contingencies and Accrued Losses (Note P)
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 144,199 and outstanding 129,573 as of May 2021; issued 143,261 and outstanding 129,511 as of May 2020	1,295	1,295
Paid-in capital	1,055,400	1,014,428
Treasury stock, at cost	(653,006)	(580,117)
Accumulated other comprehensive (loss)	(514,884)	(717,497)
Retained earnings	1,852,259	1,544,336
Total RPM International Inc. stockholders' equity	1,741,064	1,262,445
Noncontrolling Interest	1,961	2,218
Total equity	1,743,025	1,264,663
Total Liabilities and Stockholders' Equity	$ 6,252,969	$ 5,630,954

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Statement Of Financial Position [Abstract]
Trade accounts receivable, allowances	$ 55,922	$ 55,847
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	144,199,000	143,261,000
Common stock, outstanding	129,573,000	129,511,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Income Statement [Abstract]
Net Sales	[1]	$ 6,106,288	$ 5,506,994	$ 5,564,551
Cost of Sales		3,701,129	3,414,139	3,476,231
Gross Profit		2,405,159	2,092,855	2,088,320
Selling, General and Administrative Expenses		1,664,026	1,548,653	1,596,043
Restructuring Expense		18,106	33,108	42,310
Goodwill and Other Intangible Asset Impairments				4,190
Interest Expense		85,400	101,003	102,392
Investment (Income), Net		(44,450)	(9,739)	(730)
Other Expense, Net		13,639	12,066	4,270
Income Before Income Taxes		668,438	407,764	339,845
Provision for Income Taxes		164,938	102,682	72,158
Net Income		503,500	305,082	267,687
Less: Net Income Attributable to Noncontrolling Interests		857	697	1,129
Net Income Attributable to RPM International Inc. Stockholders		$ 502,643	$ 304,385	$ 266,558
Average Number of Shares of Common Stock Outstanding:
Basic		128,334	128,468	130,552
Diluted	[2]	128,927	129,974	134,333
Earnings per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic		$ 3.89	$ 2.35	$ 2.03
Diluted		$ 3.87	$ 2.34	$ 2.01

[1]	It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines.
[2]	For the years ended May 31, 2021, 2020 and 2019, approximately 362,016, 340,000 and 862,500 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 503,500	$ 305,082	$ 267,687
Other Comprehensive Income, Before Tax:
Foreign Currency Translation Adjustments	148,492	(71,839)	(73,594)
Pension and Other Postretirement Benefit Liability Adjustments
Net Gain (Loss) Arising During the Period	88,958	(109,358)	(87,525)
Prior Service Cost Arising During the Period		893	22
Less: Amortization of Prior Service (Credit) Included in Net Periodic Pension Cost	(309)	(246)	(132)
Less: Amortization of Net Loss and Settlement Recognition	33,344	21,176	14,848
Effect of Exchange Rates on Amounts Included for Pensions	(8,009)	1,188	2,002
Pension and Other Postretirement Benefit Liability Adjustments	113,984	(86,347)	(70,785)
Unrealized Gain (Loss) on Available-For-Sale Securities
Unrealized Holding Gains (Losses) During the Period	(593)	1,210	458
Less: Reclassification Adjustments for Losses (Gains) Included in Net Income	(268)		1,626
Unrealized Gain (Loss) on Available-For-Sale Securities	(861)	1,210	2,084
Unrealized Gain (Loss) on Derivatives	(31,087)	(6,315)	4,713
Other Comprehensive Income (Loss), Before Tax	230,528	(163,291)	(137,582)
Income Tax Expense (Benefit) Related to Components of Other Comprehensive Income	(27,783)	23,403	19,068
Other Comprehensive Income (Loss), After Tax	202,745	(139,888)	(118,514)
Comprehensive Income	706,245	165,194	149,173
Less: Comprehensive Income Attributable to Noncontrolling Interests	988	678	1,195
Comprehensive Income Attributable to RPM International Inc. Stockholders	$ 705,257	$ 164,516	$ 147,978

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Cash Flows From Operating Activities:
Net Income		$ 503,500	$ 305,082	$ 267,687
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation & Amortization		146,857	156,842	141,742
Restructuring charges, net of payments		(2,909)	6,831	8,072
Goodwill, intangible and other asset impairments				4,190
Fair value adjustments to contingent earnout obligations		(582)	680	1,918
Deferred income taxes		20,188	(12,150)	5,434
Stock-based compensation expense		40,926	19,789	31,154
Other non-cash interest expense				1,552
Realized/unrealized losses (gains) on sales of marketable securities		(38,774)	(1,132)	7,613
Loss on extinguishment of debt	[1]			3,051
Other		(2,340)	(77)	(3,288)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
(Increase) decrease in receivables		(88,618)	82,060	(131,204)
(Increase) decrease in inventory		(68,802)	21,309	(16,829)
(Increase) decrease in prepaid expenses and other current and long-term assets		(11,457)	17,614	(14,826)
Increase (decrease) in accounts payable		151,388	(27,111)	(29,628)
Increase (decrease) in accrued compensation and benefits		62,966	(6,198)	19,241
Increase (decrease) in accrued losses		8,510	487	(1,803)
Increase (decrease) in other accrued liabilities		43,010	(23,665)	(5,232)
Other		2,293	9,558	4,097
Cash Provided By Operating Activities		766,156	549,919	292,941
Cash Flows From Investing Activities:
Capital expenditures		(157,199)	(147,756)	(136,757)
Acquisition of businesses, net of cash acquired		(165,223)	(65,102)	(168,205)
Purchase of marketable securities		(121,669)	(28,891)	(19,787)
Proceeds from sales of marketable securities		112,298	31,337	69,743
Other		5,405	799	6,760
Cash (Used For) Investing Activities		(326,388)	(209,613)	(248,246)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt			485,306	628,083
Reductions of long-term and short-term debt		(188,278)	(471,035)	(273,109)
Cash dividends		(194,720)	(185,101)	(181,409)
Repurchase of common stock		(49,956)	(125,000)	(200,222)
Shares of common stock returned for taxes		(22,826)	(18,075)	(21,758)
Payments of acquisition-related contingent consideration		(2,218)	(606)	(4,066)
Other		(1,621)	(2,359)	(1,361)
Cash (Used For) Financing Activities		(459,619)	(316,870)	(53,842)
Effect of Exchange Rate Changes on Cash and Cash Equivalents		33,139	(13,188)	(12,107)
Net Change in Cash and Cash Equivalents		13,288	10,248	(21,254)
Cash and Cash Equivalents at Beginning of Period		233,416	223,168	244,422
Cash and Cash Equivalents at End of Period		246,704	233,416	223,168
Cash paid during the year for:
Interest		82,440	103,143	101,415
Income taxes, net of refunds		$ 147,436	$ 102,892	68,357
Supplemental Disclosures of Non-Cash Investing and Financing Activities:
Conversion of Debt to Equity				$ 38,239

[1]	In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Paid-In Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment	Total RPM International Inc. Equity	Total RPM International Inc. EquityCumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests
Beginning Balance at May. 31, 2018	$ 1,633,538	$ (2,833)	$ 1,336	$ 982,067	$ (236,318)	$ (459,048)	$ 1,342,736	$ (2,833)	$ 1,630,773	$ (2,833)	$ 2,765
Beginning Balance (in shares) at May. 31, 2018			133,647,000
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201409Member
Net income	$ 267,687						266,558		266,558		1,129
Other comprehensive income (loss)	(118,514)					(118,580)			(118,580)		66
Dividends declared and paid	(181,409)						(181,409)		(181,409)
Other noncontrolling interest activity	(1,307)										(1,307)
Share repurchases under repurchase program	$ (200,222)		$ (33)	33	(200,222)				(200,222)
Share repurchases under repurchase program (in shares)	(3,286,907)		(3,287,000)
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes	$ 14,473		$ 1	35,437	(20,965)				14,473
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes (in shares)			36,000
Convertible bond redemption	(2,808)		$ 6	(23,029)	20,215				(2,808)
Convertible bond redemption (in shares)			599,000
Ending Balance at May. 31, 2019	1,408,605		$ 1,310	994,508	(437,290)	(577,628)	1,425,052		1,405,952		2,653
Ending Balance (in shares) at May. 31, 2019			130,995,000
Net income	305,082						304,385		304,385		697
Other comprehensive income (loss)	(139,888)					(139,869)			(139,869)		(19)
Dividends declared and paid	(185,101)						(185,101)		(185,101)
Other noncontrolling interest activity	(1,113)										(1,113)
Share repurchases under repurchase program	$ (125,000)		$ (20)	20	(125,000)				(125,000)
Share repurchases under repurchase program (in shares)	(2,041,847)		(2,042,000)
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes	$ 2,078		$ 5	19,900	(17,827)				2,078
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes (in shares)			558,000
Ending Balance at May. 31, 2020	1,264,663		$ 1,295	1,014,428	(580,117)	(717,497)	1,544,336		1,262,445		2,218
Ending Balance (in shares) at May. 31, 2020			129,511,000
Net income	503,500						502,643		502,643		857
Other comprehensive income (loss)	202,745					202,613			202,613		132
Dividends declared and paid	(194,720)						(194,720)		(194,720)
Other noncontrolling interest activity	(1,246)										(1,246)
Share repurchases under repurchase program	$ (49,956)		$ (6)	6	(49,956)				(49,956)
Share repurchases under repurchase program (in shares)	(594,061)		(594,000)
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes	$ 18,039		$ 6	40,966	(22,933)				18,039
Stock compensation expense and other deferred compensation, shares granted less shares returned for taxes (in shares)			656,000
Ending Balance at May. 31, 2021	$ 1,743,025		$ 1,295	$ 1,055,400	$ (653,006)	$ (514,884)	$ 1,852,259		$ 1,741,064		$ 1,961
Ending Balance (in shares) at May. 31, 2021			129,573,000

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividends declared and paid per share	$ 1.50	$ 1.43	$ 1.37

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	May 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE A — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES 1) Consolidation, Noncontrolling Interests and Basis of Presentation 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). 2) Use of Estimates The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. 3) Acquisitions/Divestitures We account for business combinations and asset acquisitions using the acquisition method of accounting and, accordingly, the assets and liabilities of the acquired entities are recorded at their estimated fair values at the acquisition date. During the fiscal year ended May 31, 2021, we completed a total of four acquisitions in each of our four reportable segments. Within our Consumer reportable segment, we acquired a manufacturer of sandpaper and other abrasives headquartered in Fairborn, Ohio. Within our PCG reportable segment, we acquired a manufacturer of raised flooring systems headquartered in Denver, Colorado. We also completed immaterial acquisitions within our SPG and CPG reportable segments. During the fiscal year ended May 31, 2020, we completed a total of three acquisitions among three of our four reportable segments. Within our CPG reportable segment, we acquired a manufacturer and marketer of joint sealants for commercial construction headquartered in Hudson, New Hampshire. Within our PCG reportable segment, we acquired a manufacturer of trenchless pipe rehabilitation equipment headquartered in Quebec, Canada. Lastly, within our SPG reportable segment, we acquired a manufacturer of dry stabilizer and emulsifier blends for the food industry headquartered in Elgin, Illinois. The purchase price for each acquisition has been allocated to the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition. We have finalized the purchase price allocation for our fiscal 2020 acquisitions. For acquisitions completed during fiscal 2021, the valuations of consideration transferred, total assets acquired and liabilities assumed are substantially complete. The primary areas that remain preliminary relate to working capital adjustments. Acquisitions are aggregated by year of purchase in the following table: Fiscal 2021 Acquisitions Fiscal 2020 Acquisitions (In thousands) Weighted-Average Intangible Asset Amortization Life (In Years) Total Weighted-Average Intangible Asset Amortization Life (In Years) Total Current assets $ 50,310 $ 10,649 Property, plant and equipment 27,012 1,694 Goodwill N/A 41,654 N/A 28,291 Trade names - indefinite lives N/A 16,694 N/A 1,555 Other intangible assets 20 53,894 16 31,046 Other long-term assets 6,831 56 Total Assets Acquired $ 196,395 $ 73,291 Liabilities assumed (24,232 ) (7,135 ) Net Assets Acquired $ 172,163 (1) $ 66,156 (2) (1) Figure includes cash acquired of $6.4 million. (2) Figure includes cash acquired of $1.6 million. Our Consolidated Financial Statements reflect the results of operations of acquired businesses as of their respective dates of acquisition. Pro-forma results of operations for the years ended May 31, 2021 and 2020 were not materially different from reported results and, consequently, are not presented. 4) Foreign Currency The functional currency for each of our foreign subsidiaries is its principal operating currency. Accordingly, for the periods presented, assets and liabilities have been translated using exchange rates at year end, while income and expense for the periods have been translated using a weighted-average exchange rate. The resulting translation adjustments have been recorded in accumulated other comprehensive income (loss), a component of stockholders’ equity, and will be included in net earnings only upon the sale or liquidation of the underlying foreign investment, neither of which is contemplated at this time. Transaction gains and losses have moderated during the last three fiscal years based on more modest fluctuations in the strength of the U.S. dollar, resulting in net transactional foreign exchange losses in fiscal 2021 and 2019 of approximately $2.8 million and $4.8 million, respectively, and net transactional foreign exchange gains for fiscal 2020 of approximately $0.3 million. 5) Cash and Cash Equivalents We consider all highly liquid debt instruments purchased with a maturity of three months or less to be cash equivalents. We do not believe we are exposed to any significant credit risk on cash and cash equivalents. The carrying amounts of cash and cash equivalents approximate fair value. 6) Property, Plant & Equipment May 31, 2021 2020 (In thousands) Land $ 93,455 $ 85,860 Buildings and leasehold improvements 518,205 469,483 Machinery and equipment 1,355,822 1,199,847 Total property, plant and equipment, at cost 1,967,482 1,755,190 Less: allowance for depreciation and amortization 1,002,300 905,504 Property, plant and equipment, net $ 965,182 $ 849,686 We review long-lived assets for impairment when circumstances indicate that the carrying values of these assets may not be recoverable. For assets that are to be held and used, an impairment charge is recognized when the estimated undiscounted future cash flows associated with the asset or group of assets are less than their carrying value. If impairment exists, an adjustment is made to write the asset down to its fair value, and a loss is recorded for the difference between the carrying value and the fair value. Fair values are determined based on quoted market values, discounted cash flows, internal appraisals or external appraisals, as applicable. Assets to be disposed of are carried at the lower of their carrying value or estimated net realizable value. Depreciation is computed primarily using the straight-line method over the following ranges of useful lives: Buildings and leasehold improvements 1 to 50 years Machinery and equipment 1 to 40 years Total depreciation expense for each fiscal period includes the charges to income that result from the amortization of assets recorded under finance leases. For the periods ended May 31, 2021, 2020 and 2019, we recorded depreciation expense of $99.4 million, $108.5 million, and $94.0 million, respectively. 7) Revenue Recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. The majority of our revenue is recognized at a point in time. However, we also record revenues generated under construction contracts, mainly in connection with the installation of specialized roofing and flooring systems and related services. For certain polymer flooring installation projects, we account for our revenue using the output method, as we consider square footage of completed flooring to be the best measure of progress toward the complete satisfaction of the performance obligation. In contrast, for certain of our roofing installation projects, we account for our revenue using the input method, as that method was the best measure of performance as it considers costs incurred in relation to total expected project costs, which essentially represents the transfer of control for roofing systems to the customer. In general, for our other construction contracts, we record contract revenues and related costs as our contracts progress on an over-time model. Effective June 1, 2018, we adopted Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” and all the related amendments included within Accounting Standards Codification 606 (“ASC 606”). 8) Shipping Costs We identify shipping and handling costs as costs paid to third-party shippers for transporting products to customers, and we include these costs in cost of sales in our Consolidated Statements of Income. 9) Allowance for Credit Losses Our primary allowance for credit losses is the allowance for doubtful accounts. The allowance for doubtful accounts reduces the trade accounts receivable balance to the estimated net realizable value equal to the amount that is expected to be collected. The allowance is established using assessments of current creditworthiness of customers, historical collection experience, the aging of receivables and other currently available evidence. Trade accounts receivable balances are written-off against the allowance if a final determination of uncollectibility is made. All provisions for allowances for doubtful collection of accounts are included in selling, general and administrative expenses. Actual collections of trade receivables could differ from our estimates due to changes in future economic or industry conditions or specific customer’s financial conditions. For the periods ended May 31, 2021, 2020 and 2019, bad debt expense approximated $10.0 million, $16.7 million and $18.6 million, respectively. Bad debt expense was elevated in fiscal 2020 and fiscal 2019 due to additional write-offs associated with exiting unprofitable product lines and regions in conjunction with our MAP to Growth. Fiscal 2020 bad debt expense also reflects, although to a much lesser degree, due to the impact Covid had on some of our customers’ ability to pay timely. Refer to Note B, “Restructuring,” for further information. 10) Inventories Inventories are stated at the lower of cost or net realizable value, cost being determined on a first-in, first-out (FIFO) basis and net realizable value being determined on the basis of replacement cost. Inventory costs include raw materials, labor and manufacturing overhead. We review the net realizable value of our inventory in detail on an on-going basis, with consideration given to various factors, which include our estimated reserves for excess, obsolete, slow-moving or distressed inventories. If actual market conditions differ from our projections, and our estimates prove to be inaccurate, write-downs of inventory values and adjustments to cost of sales may be required. Historically, our inventory reserves have approximated actual experience. For the periods ended May 31, 2021, 2020 and 2019, charges related to slow moving and/or obsolete inventory on hand approximated $3.7 million, $39.6 million and $29.4 million, respectively. Charges recorded during fiscal 2021 were more normalized in comparison to fiscal 2020 and fiscal 2019, which both had elevated inventory charges associated with our MAP to Growth restructuring activities. During fiscal 2020, we recorded $28.8 million within our Consumer reportable segment consisting of proactive management of excess quantities of inventory in order to accelerate cash conversion, SKU rationalization, and exiting unprofitable product lines and regions and $3.2 million within our PCG segment related to exiting unprofitable product lines and regions. During fiscal 2019, we recorded $10.5 million in charges resulting from more proactive management of inventory at our Consumer segment, and $9.0 million and $1.0 million of inventory charges related to restructuring activities at our PCG and CPG segments, respectively. Inventories were composed of the following major classes: May 31, 2021 2020 (In thousands) Raw materials and supplies $ 447,220 $ 282,579 Finished goods 490,875 527,869 Total Inventory $ 938,095 $ 810,448 11) Goodwill and Other Intangible Assets We account for goodwill and other intangible assets in accordance with the provisions of ASC 350 and account for business combinations using the acquisition method of accounting and, accordingly, the assets and liabilities of the entities acquired are recorded at their estimated fair values at the acquisition date. Goodwill Goodwill represents the excess of the purchase price paid over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Goodwill is assigned to reporting units that are expected to benefit from the synergies of the business combination as of the acquisition date. Once goodwill has been allocated to the reporting units, it no longer retains its identification with a particular acquisition and becomes identified with the reporting unit in its entirety. Accordingly, the fair value of the reporting unit as a whole is available to support the recoverability of its goodwill. We evaluate our reporting units when changes in our operating structure occur, and if necessary, reassign goodwill using a relative fair value allocation approach. We test our goodwill balances at least annually, or more frequently as impairment indicators arise, at the reporting unit level. Our annual impairment assessment date has been designated as the first day of our fourth fiscal quarter. Our reporting units have been identified at the component level, which is one level below our operating segments. We follow the Financial Accounting Standards Board (“FASB”) guidance found in Accounting Standards Codification (“ASC”) 350 that simplifies how an entity tests goodwill for impairment. It provides an option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, and whether it is necessary to perform a quantitative goodwill impairment test. We assess qualitative factors in each of our reporting units that carry goodwill. We assess these qualitative factors to determine whether it is necessary to perform the quantitative goodwill impairment test. The quantitative process is required only if we conclude that it is more likely than not that a reporting unit’s fair value is less than its carrying amount. However, we have an unconditional option to bypass a qualitative assessment and proceed directly to performing the quantitative analysis. In applying the quantitative test, we compare the fair value of a reporting unit to its carrying value. If the calculated fair value is less than the current carrying value, then impairment of the reporting unit exists. In applying the market approach, we use market multiples derived from a set of similar companies. In applying the income approach, we evaluate discounted future cash flows determined from estimated cashflow adjustments to a reporting unit’s projected EBITDA. Under this approach, we calculate the fair value of a reporting unit based on the present value of estimated future cash flows. In applying the discounted cash flow methodology utilized in the income approach, we rely on a number of factors, including future business plans, actual and forecasted operating results, and market data. The significant assumptions employed under this method include discount rates; revenue growth rates, including assumed terminal growth rates; and operating margins used to project future cash flows for a reporting unit. The discount rates utilized reflect market-based estimates of capital costs and discount rates adjusted for management’s assessment of a market participant’s view with respect to other risks associated with the projected cash flows of the individual reporting unit. Our estimates are based upon assumptions we believe to be reasonable, but which by nature are uncertain and unpredictable. We believe we incorporate ample sensitivity ranges into our analysis of goodwill impairment testing for a reporting unit, such that actual experience would need to be materially out of the range of expected assumptions in order for an impairment to remain undetected. Changes in the Composition of Reporting Units in Fiscal 2020 On June 1, 2019, the composition of our reportable segments was revised, as further discussed in Note R, “Segment Information.” Prior to implementing the revised segment reporting structure beginning in fiscal 2020, our previously disclosed Industrial segment comprised two operating segments, the CPG operating segment and the PCG operating segment. Each of these operating segments comprised several reporting units, all of which were tested during the annual goodwill impairment test during the fourth quarter of fiscal 2019, 2020 and 2021. Also, in connection with our Map to Growth, we realigned certain businesses and management structure within our SPG segment. As such, our former Wood Finishes Group reporting unit was split into two separate reporting units: Guardian and Wood Finishes Group. Additionally, our former Kop-Coat Group reporting unit was split into two reporting units: Kop-Coat Industrial Protection Products and Kop-Coat Group. We performed an interim goodwill impairment test for each of the new reporting units upon the change in reportable segments, business realignment and management structure using a quantitative assessment. We concluded that the estimated fair values exceeded the carrying values for these new reporting units, and accordingly, no indications of impairment were identified as a result of these changes during the first quarter of fiscal 2020. Conclusion on Annual Goodwill Impairment Tests As a result of the annual impairment assessments performed for fiscal 2021, 2020 and 2019, there were no goodwill impairments. Indefinite-Lived Intangible Assets Additionally, we test all indefinite-lived intangible assets for impairment at least annually during our fiscal fourth quarter. We follow the guidance provided by ASC 350 that simplifies how an entity tests indefinite-lived intangible assets for impairment. It provides an option to first assess qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before applying traditional quantitative tests. We applied both qualitative and quantitative processes during our annual indefinite-lived intangible asset impairment assessments performed during the fourth quarters of fiscal 2021, 2020 and 2019. The annual impairment assessment involves estimating the fair value of each indefinite-lived asset and comparing it with its carrying amount. If the carrying amount of the intangible asset exceeds its fair value, we record an impairment loss equal to the difference. Calculating the fair value of the indefinite-lived assets requires our significant use of estimates and assumptions. We estimate the fair values of our intangible assets by applying a relief-from-royalty calculation, which includes discounted future cash flows related to each of our intangible asset’s projected revenues. In applying this methodology, we rely on a number of factors, including actual and forecasted revenues and market data. Our required annual impairment test of each of our indefinite-lived intangible assets performed during fiscal 2021, 2020 and 2019 did not result in an impairment charge. Although no impairment losses were recorded as a result of our annual impairment tests, we did record an intangible impairment charge in both fiscal 2020 and fiscal 2019. In fiscal 2020, in connection with Map to Growth, we recorded an impairment charge of $4.0 million included in restructuring expense in our Consumer reportable segment for impairment losses on indefinite-lived trade names. In fiscal 2019, we recorded an impairment charge of $4.2 million, of which $2.0 million was recorded by our CPG reportable segment for impairment losses on indefinite-lived trade names and approximately $2.2 million was recorded by our SPG reportable segment for impairment losses on definite-lived customer-related intangibles. Refer to Note C “Goodwill and Other Intangible Assets” for additional details on these indefinite-lived intangible asset impairment charges. 12) Advertising Costs Advertising costs are charged to operations when incurred and are included in SG&A expenses. For the years ended May 31, 2021, 2020 and 2019, advertising costs were $61.1 million, $49.7 million and $57.5 million, respectively. 13) Research and Development Research and development costs are charged to operations when incurred and are included in SG&A expenses. The amounts charged to expense for the years ended May 31, 2021, 2020 and 2019 were $77.6 million, $76.5 million and $71.6 million, respectively. 14) Stock-Based Compensation Stock-based compensation represents the cost related to stock-based awards granted to our employees and directors, which may include restricted stock and stock appreciation rights (“SARs”). We measure stock-based compensation cost at the date of grant, based on the estimated fair value of the award. We recognize the cost as expense on a straight-line basis (net of estimated forfeitures) over the related vesting period. Refer to Note J, “Stock-Based Compensation,” for further information. 15) Investment (Income), Net Investment (income), net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Interest (income) $ (3,555 ) $ (5,313 ) $ (4,885 ) Net (gain) loss on marketable securities (38,774 ) (1,629 ) 8,366 Dividend (income) (2,121 ) (2,797 ) (4,211 ) Investment (income), net $ (44,450 ) $ (9,739 ) $ (730 ) Net (Gain) Loss on Marketable Securities Year Ended May 31, 2021 2020 2019 (In thousands) Unrealized (gains) losses on marketable equity securities $ (16,133 ) $ (1,457 ) $ 5,827 Realized (gains) losses on marketable equity securities (22,680 ) (237 ) 2,322 Realized losses on available-for-sale debt securities 39 65 217 Net (gain) loss on marketable securities $ (38,774 ) $ (1,629 ) $ 8,366 16) Other Expense, Net Other expense, net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Royalty expense (income), net (a) $ (387 ) $ 5,206 $ (96 ) (Income) related to unconsolidated equity affiliates (516 ) (165 ) (332 ) Pension non-service costs 14,542 6,076 1,647 Loss on extinguishment of debt (b) - - 3,051 Loss on divestiture (c) - 949 - Other expense, net $ 13,639 $ 12,066 $ 4,270 (a) Includes a $5.3 million charge incurred during the fourth quarter of fiscal 2020 related to the termination of a licensing agreement within our Consumer reportable segment. (b) In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion. (c) Reflects the loss incurred upon divestiture of a contracting business located in Australia, which had reported through our PCG segment. 17) Income Taxes The provision for income taxes is calculated using the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for the tax effect of temporary differences between the financial statement carrying amount of assets and liabilities and the amounts used for income tax purposes and for certain changes in valuation allowances. Valuation allowances are recorded to reduce certain deferred tax assets when, in our estimation, it is more likely than not that a tax benefit will not be realized. 18) Earnings Per Share of Common Stock Earnings per share (EPS) is computed using both the treasury stock and two-class method, as our unvested share-based payment awards contain rights to receive non-forfeitable dividends are considered participating securities. We calculate both Basic and Diluted EPS under each method and compare the results, reporting the method that is most dilutive. Basic EPS of common stock is computed by dividing net income by the weighted-average number of shares of common stock outstanding for the period. Diluted EPS of common stock is computed on the basis of the weighted-average number of shares of common stock, plus the effect of dilutive potential shares of common stock outstanding during the period using the treasury stock method. Dilutive potential shares of common stock include outstanding SARS, restricted stock awards and convertible notes. The treasury stock method also assumes that we use the proceeds from the hypothetical exercise of the stock compensation awards to repurchase common stock at the average market price during the period. The two-class method determines EPS for each class of common stock and participating securities according to dividends and dividend equivalents and their respective participation rights in undistributed earnings. See Note L, “Earnings Per Share,” to the Consolidated Financial Statements for additional information. 19) Recent Accounting Pronouncements New Pronouncements Adopted In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses,” which requires an organization to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Additionally, the standard amends the current available-for-sale securities other-than-temporary impairment model for debt securities. The guidance is effective for fiscal years beginning after December 15, 2019 and for interim periods therein. The adoption of this new guidance, effective June 1, 2020, using the modified retrospective transition method, did not result in a cumulative-effect adjustment to the opening balance of retained earnings at June 1, 2020 and did not have a material impact on our Consolidated Financial Statements. Refer to Note Q, “Revenue” for additional information. 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. The adoption of this new guidance, effective June 1, 2020, did not have a material impact on our Consolidated Financial Statements or disclosures. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820), – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which makes a number of changes meant to add, modify or remove certain disclosure requirements associated with the movement amongst or hierarchy associated with Level 1, Level 2 and Level 3 fair value measurements. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The adoption of this new guidance, effective June 1, 2020, did not have a material impact on our Consolidated Financial Statements or disclosures. In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20), Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans,” which makes a number of changes meant to add, modify or remove certain disclosure requirements associated with employers that sponsor defined benefit or other postretirement plans. This guidance is effective for fiscal years ending after December 15, 2020. Early adoption was permitted for all entities and the amendments in this update are required to be applied on a retrospective basis to all periods presented. The adoption of this new guidance, effective for the fiscal year ending May 31, 2021, did not have a material impact on our Consolidated Financial Statements or disclosures. New Pronouncements Issued In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the amendments is permitted, including adoption in any interim period for which financial statements have not yet been issued. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective or prospective basis. We are currently reviewing the provisions of this new pronouncement, but do not expect our adoption of this guidance to have a material impact on our Consolidated Financial Statements. 20) Subsequent Event Share Repurchases From June 1, 2021 through July 23, 2021, we have repurchased 133,388 shares of RPM common stock since May 31, 2021, at a cost of approximately $12.5 million, or an average of $93.71 per share, under the stock repurchase program described further in Note I, “Stock Repurchase Program.”

Restructuring

Restructuring	12 Months Ended
Restructuring	May 31, 2021
Restructuring And Related Activities [Abstract]
Restructuring	NOTE B — RESTRUCTURING We record restructuring charges associated with management-approved restructuring plans to either reorganize one or more of our business segments, or to remove duplicative headcount and infrastructure associated with our businesses. Restructuring charges can include severance costs to eliminate a specified number of employees, infrastructure charges to vacate facilities and consolidate operations, contract cancellation costs and other costs. Restructuring charges are recorded based upon planned employee termination dates and site closure and consolidation plans. The timing of associated cash payments is dependent upon the type of restructuring charge and can extend over a multi-year period. We record the short-term portion of our restructuring liability in Other Accrued Liabilities and the long-term portion, if any, in Other Long-Term Liabilities in our Consolidated Balance Sheets. MAP to Growth Between May and August 2018, we approved and implemented the initial phases of a multi-year restructuring plan, which was originally referred to as the 2020 Margin Acceleration Plan (“2020 MAP to Growth”). The initial phases of our 2020 MAP to Growth affected all of our reportable segments, as well as our corporate/nonoperating segment, and focused on margin improvement by simplifying business processes; reducing inventory categories and rationalizing SKUs; eliminating underperforming businesses; reducing headcount and working capital; and improving operating efficiency. The disruption caused by the outbreak of the Covid pandemic delayed the finalization of our 2020 MAP to Growth past the original target completion date of December 31, 2020. In recognition of the fact our restructuring plan extends past calendar year 2020, we began referring to it simply as our “MAP to Growth.” On May 31, 2021, we formally concluded our MAP to Growth. However, certain projects identified prior to May 31, 2021 will not be completed until fiscal 2022, and as such, we plan to continue recognizing restructuring expense throughout fiscal 2022. The final implementation and total expected costs are subject to change as we complete these projects. Our execution of the MAP to Growth drove the de-layering and simplification of management and businesses associated with group realignment. We have implemented four center-led functional areas including manufacturing and operations; procurement and supply chain; information technology; and accounting and finance. Our MAP to Growth optimized our manufacturing facilities and provided more efficient plant and distribution facilities. Through the balance sheet date, in association with our MAP to Growth, we have completed, or are in the process of completing, the planned closure of 28 plants and 28 warehouses. We also expect to incur additional severance and benefit costs as part of our planned closure of these facilities. Although our MAP to Growth has concluded, we will continue to assess and find areas of improvement and cost savings. As such, the final implementation and total expected costs are subject to change. In addition to the announced plan, we have continued to broaden the scope of our MAP to Growth, specifically in consolidation of the general and administrative areas, potential outsourcing, as well as additional future plant closures and consolidations; the estimated costs of which have not yet been finalized. The current total expected costs associated with this plan are outlined in the table below and increased by approximately $5.2 million compared to our prior quarter estimate, primarily attributable to increases of approximately $2.6 million in expected severance and benefit costs and $2.6 million and facility closure and other related costs. A summary of the charges recorded in connection with restructuring by reportable segment during is as follows: Year Ended Year Ended Year Ended Cumulative Costs Total Expected (in thousands) May 31, 2021 May 31, 2020 May 31, 2019 to Date Costs CPG Segment: Severance and benefit costs (a) $ 3,194 $ 6,866 $ 9,459 $ 21,288 $ 21,534 Facility closure and other related costs 2,103 1,508 1,924 6,580 7,836 Other asset write-offs 38 352 215 1,978 1,978 Total Charges $ 5,335 $ 8,726 $ 11,598 $ 29,846 $ 31,348 PCG Segment: Severance and benefit costs (b) $ 2,974 $ 6,973 $ 6,012 $ 16,359 $ 16,900 Facility closure and other related costs 1,282 1,873 3,474 6,629 7,735 Other asset write-offs 316 248 353 917 917 Total Charges $ 4,572 $ 9,094 $ 9,839 $ 23,905 $ 25,552 Consumer Segment: Severance and benefit costs (c) $ 1,840 $ 3,089 $ 1,726 $ 12,307 $ 12,307 Facility closure and other related costs 3,147 2,245 1,553 12,081 14,024 Other asset write-offs 301 4,094 25 4,420 4,420 Total Charges $ 5,288 $ 9,428 $ 3,304 $ 28,808 $ 30,751 SPG Segment: Severance and benefit costs (d) $ 1,197 $ 1,592 $ 5,338 $ 8,127 $ 9,504 Facility closure and other related costs 1,424 2,922 1,244 5,590 6,460 Other asset write-offs 99 119 1,003 1,221 1,221 Total Charges $ 2,720 $ 4,633 $ 7,585 $ 14,938 $ 17,185 Corporate/Other Segment: Severance and benefit costs (e) $ 191 $ 1,227 $ 9,984 $ 13,538 $ 13,538 Total Charges $ 191 $ 1,227 $ 9,984 $ 13,538 $ 13,538 Consolidated: Severance and benefit costs $ 9,396 $ 19,747 $ 32,519 $ 71,619 $ 73,783 Facility closure and other related costs 7,956 8,548 8,195 30,880 36,055 Other asset write-offs 754 4,813 1,596 8,536 8,536 Total Charges $ 18,106 $ 33,108 $ 42,310 $ 111,035 $ 118,374 a) Severance and benefit costs are associated with the elimination of 34 positions, 112 positions and 109 positions during fiscal 2021, 2020 and 2019, respectively. Additionally, $0.2 million included in the fiscal year 2019 charges are associated with the prior elimination of one position within the legal function during fiscal 2018. b) Severance and benefit costs are associated with the elimination of 71 positions, 161 positions and 114 positions during fiscal 2021, 2020 and 2019, respectively. c) Severance and benefit costs are associated with the elimination of 29 positions, 92 positions and 21 positions during fiscal 2021, 2020 and 2019, respectively. d) Severance and benefit costs are associated with the elimination of 35 positions and 94 positions and 130 positions during fiscal 2021, 2020 and 2019, respectively. e) Severance and benefit costs are associated with the elimination of two positions during fiscal 2020. Also reflects fiscal 2019 charges related to the severance of two corporate executives, as well as accelerated vesting of equity awards for two corporate executives, four SPG segment executives and three CPG segment executives in connection with the aforementioned restructuring activities. A summary of the activity in the restructuring reserves related to our MAP to Growth is as follows: (in thousands) Severance and Benefits Costs Facility Closure and Other Related Costs Other Asset Write-Offs Total Balance at June 1, 2019 $ 4,837 $ 7,857 $ - $ 12,694 Additions charged to expense 19,747 8,548 4,813 33,108 Cash payments charged against reserve (17,038 ) (9,239 ) - (26,277 ) Non-cash charges and other adjustments (189 ) (1,286 ) (4,813 ) (6,288 ) Balance at May 31, 2020 $ 7,357 $ 5,880 $ - $ 13,237 Additions charged to expense 9,396 7,956 754 18,106 Cash payments charged against reserve (12,413 ) (8,268 ) (335 ) (21,016 ) Non-cash charges and other adjustments 90 (4,278 ) (419 ) (4,607 ) Balance at May 31, 2021 $ 4,430 $ 1,290 $ - $ 5,720 In connection with our MAP to Growth, during fiscal 2021, we incurred approximately $1.5 million and $0.1 million of inventory-related charges at our Consumer and CPG segments, respectively. All of the aforementioned inventory-related charges were the result of initiatives in connection with our overall plan of restructuring, and are recorded in costs of sales in our Consolidated Statements of Income. In connection with our MAP to Growth, during fiscal 2020, we incurred approximately $16.3 million, $3.2 million, $0.7 million and $0.1 million of inventory-related charges at our Consumer, PCG, CPG and SPG segments, respectively. All of the aforementioned inventory-related charges were the result of the exit of a business or product line and SKU rationalization initiatives in connection with our overall plan of restructuring, and are recorded in cost of sales in our Consolidated Statements of Income. In connection with our MAP to Growth, during fiscal 2019, we incurred approximately $1.0 million, $9.0 million and $2.1 million of inventory-related charges at our CPG, PCG and Consumer segments, respectively. The inventory-related charges are partially offset by a favorable adjustment of approximately $0.2 million to the fiscal 2018 write-off at our Consumer segment. All of the aforementioned inventory-related charges were the result of the exit of a business or product line and SKU rationalization initiatives in connection with our overall plan of restructuring, and are recorded in cost of sales in our Consolidated Statements of Income.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
Goodwill and Other Intangible Assets	May 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	NOTE C — GOODWILL AND OTHER INTANGIBLE ASSETS The changes in the carrying amount of goodwill, by reportable segment, for the years ended May 31, 2021 and 2020, are as follows: CPG PCG Consumer SPG (In thousands) Segment Segment Segment Segment Total Balance as of June 1, 2019 $ 407,429 $ 185,259 $ 499,387 $ 153,687 $ 1,245,762 Acquisitions 14,689 3,023 - 10,352 28,064 Translation adjustments & other (1) (16,764 ) (2,878 ) (3,169 ) (949 ) (23,760 ) Balance as of May 31, 2020 405,354 185,404 496,218 163,090 1,250,066 Acquisitions 2,295 16,174 20,126 2,134 40,729 Translation adjustments & other 35,866 5,460 8,886 4,747 54,959 Balance as of May 31, 2021 $ 443,515 $ 207,038 $ 525,230 $ 169,971 $ 1,345,754 (1) Activity includes a $2.3 million decrease to goodwill within our Consumer segment related to adjustments to preliminary purchase price allocations, primarily due to deferred tax adjustments. Total accumulated goodwill impairment losses were $156.3 million at May 31, 2021. Of the accumulated balance, $141.4 million was recorded during the fiscal year ended May 31, 2017 by a reporting unit that at the time was included in our Consumer segment and is now included in our SPG segment, and $14.9 million was recorded during the fiscal year ended May 31, 2009 by a reporting unit that at the time was included in our former Industrial reportable segment and is now included in our CPG segment. There were no impairment losses recorded during fiscal 2021, 2020 or 2019. Other intangible assets consist of the following major classes: Gross Net Other Amortization Carrying Accumulated Intangible (In thousands) Period (In Years) Amount Amortization Assets As of May 31, 2021 Amortized intangible assets Formulae 9 to 33 $ 234,037 $ (172,989 ) $ 61,048 Customer-related intangibles 5 to 33 505,710 (233,496 ) 272,214 Trademarks/names 5 to 40 34,326 (20,575 ) 13,751 Other 5 to 33 34,086 (25,707 ) 8,379 Total Amortized Intangibles 808,159 (452,767 ) 355,392 Indefinite-lived intangible assets Trademarks/names 273,301 - 273,301 Total Other Intangible Assets $ 1,081,460 $ (452,767 ) $ 628,693 As of May 31, 2020 Amortized intangible assets Formulae 9 to 33 $ 230,621 $ (160,771 ) $ 69,850 Customer-related intangibles 5 to 33 439,153 (197,752 ) 241,401 Trademarks/names 5 to 40 30,700 (17,224 ) 13,476 Other 1 to 33 32,224 (23,281 ) 8,943 Total Amortized Intangibles 732,698 (399,028 ) 333,670 Indefinite-lived intangible assets Trademarks/names 250,710 - 250,710 Total Other Intangible Assets $ 983,408 $ (399,028 ) $ 584,380 The aggregate intangible asset amortization expense for the fiscal years ended May 31, 2021, 2020 and 2019 was $44.3 million, $45.6 million and $45.1 million, respectively. For the next five fiscal years, we estimate annual intangible asset amortization expense related to our existing intangible assets to approximate the following: fiscal 2022 — $44.3 million, fiscal 2023 — $40.8 million, fiscal 2024 — $37.8 million, fiscal 2025 — $33.0 million and fiscal 2026 — $28.9 million. During fiscal 2021, we did not record an impairment charge. During fiscal 2020 we recorded a $4.0 million impairment loss, which was classified in restructuring expense within our Consumer reportable segment, for impairment losses on indefinite-lived trade names, as a result of a decision to exit an unprofitable business and abandon a tradename in connection with MAP to Growth. During fiscal 2019 we recorded $4.2 million of intangible asset impairment losses, of which $2.0 million was recorded by our CPG reportable segment for impairment losses on trade names and approximately $2.2 million was recorded by our SPG reportable segment for impairment losses on customer-related intangibles.

Marketable Securities

Marketable Securities	12 Months Ended
Marketable Securities	May 31, 2021
Investments Debt And Equity Securities [Abstract]
Marketable Securities	NOTE D — MARKETABLE SECURITIES The following tables summarize available-for-sale debt securities held at May 31, 2021 and 2020 by asset type: Available-For-Sale Debt Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2021 Fixed maturity: U.S. treasury and other government $ 26,154 $ 593 $ (184 ) $ 26,563 Corporate bonds 143 39 - 182 Total available-for-sale debt securities $ 26,297 $ 632 $ (184 ) $ 26,745 Available-For-Sale Debt Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2020 Fixed maturity: U.S. treasury and other government $ 25,462 $ 1,314 $ (40 ) $ 26,736 Corporate bonds 143 43 - 186 Total available-for-sale debt securities $ 25,605 $ 1,357 $ (40 ) $ 26,922 Marketable securities are composed of available-for-sale debt securities and marketable equity securities and all marketable securities 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. Available-for-sale debt securities are included in other current and long-term assets totaling $3.9 million and $22.8 million at May 31, 2021, respectively, and included in other current and long-term assets totaling $7.6 million and $19.3 million at May 31, 2020, respectively. Realized gains and losses on sales of available-for-sale debt securities are recognized in net income on the specific identification basis. Changes in the fair values of available-for-sale debt securities that are determined to be holding gains or losses are recorded through accumulated other comprehensive income (loss), net of applicable taxes, within stockholders' equity. In assessing whether a credit loss exists, we evaluate our ability to hold the investment, the strength of the underlying collateral and the extent to which the investment's amortized cost or cost, as appropriate, exceeds it related fair value. As of May 31, 2021 and 2020, we held approximately $142.1 million and $87.1 million in marketable equity securities, respectively. Realized and unrealized gains and losses on marketable equity securities are included in investment (income), net in the Consolidated Statements of Income. Refer to Note A(15), “Investment (Income), Net,” for further details. Summarized below are the available-for-sale debt securities we held at May 31, 2021 and 2020 that were in an unrealized loss position and that were included in accumulated other comprehensive income (loss), aggregated by the length of time the investments had been in that position: May 31, 2021 May 31, 2020 (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Total investments with unrealized losses $ 8,420 $ (184 ) $ 2,028 $ (40 ) Unrealized losses with a loss position for less than 12 months 6,920 (152 ) - - Unrealized losses with a loss position for more than 12 months 1,500 (32 ) 2,028 (40 ) 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. The decline in fair value is largely due to changes in interest rates and other market conditions. We have evaluated these securities and have determined no allowance for credit losses is necessary for these investments. The net carrying values of available-for-sale debt securities at May 31, 2021, 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 Cost Fair Value Due: Less than one year $ 3,892 $ 3,890 One year through five years 14,591 14,964 Six years through ten years 5,221 5,318 After ten years 2,593 2,573 $ 26,297 $ 26,745

Fair Value Measurements

Fair Value Measurements	12 Months Ended
Fair Value Measurements	May 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE E — 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 credit losses is established for trade accounts receivable using assessments of current creditworthiness of customers, historical collection experience, the aging of receivables and other currently available evidence. Trade accounts receivable balances are written-off against the allowance if a final determination of uncollectibility is made. All provisions for allowance for doubtful collection of accounts are included in selling, general, and administrative expense. All derivative instruments are recognized in our Consolidated Balance Sheets and measured at fair value. Changes in the fair values of derivative instruments that do not qualify as hedges and/or any ineffective portion of hedges are recognized as a gain or (loss) in our Consolidated Statements of Income in the current period. Changes in the fair value of derivative instruments used effectively as cash flow hedges are recognized in other comprehensive income (loss), along with the change in the value of the hedged item. We do not hold or issue derivative instruments for speculative purposes. 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 addition, with respect to our derivative assets and liabilities measured at fair value, refer to Note F – Derivatives and Hedging for discussion of their classification within the fair value hierarchy. (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 Available-for-sale debt securities: U.S. Treasury and other government $ - $ 26,563 $ - $ 26,563 Corporate bonds - 182 - 182 Total available-for-sale debt securities - 26,745 - 26,745 Marketable equity securities: Stocks-foreign 768 - - 768 Stocks-domestic 6,975 - - 6,975 Mutual funds - foreign - 47,916 - 47,916 Mutual funds - domestic - 86,428 - 86,428 Total marketable equity securities 7,743 134,344 - 142,087 Contingent consideration - - (13,335 ) (13,335 ) Total $ 7,743 $ 161,089 $ (13,335 ) $ 155,497 (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 Available-for-sale debt securities: U.S. Treasury and other government $ - $ 26,736 $ - $ 26,736 Corporate bonds - 186 - 186 Total available-for-sale debt securities - 26,922 - 26,922 Marketable equity securities: Stocks-domestic 3,870 - - 3,870 Mutual funds - foreign - 28,815 - 28,815 Mutual funds - domestic - 63,536 - 63,536 Total marketable equity securities 3,870 92,351 - 96,221 Contingent consideration - - (15,682 ) (15,682 ) Total $ 3,870 $ 119,273 $ (15,682 ) $ 107,461 Our investments in available-for-sale debt securities and marketable equity securities 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 fiscal 2021, we paid approximately $2.8 million for settlements of contingent consideration obligations relating to certain performance milestones that were established in prior periods and achieved during the current year. During fiscal 2020, we paid approximately $6.4 million for settlements of contingent consideration obligations relating to certain performance milestones that were established in prior periods and achieved during fiscal 2020. These amounts are reported in payments of acquisition-related contingent consideration 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 May 31, 2021 and 2020, 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 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 May 31, 2021 and 2020 are as follows: At May 31, 2021 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 246,704 $ 246,704 Marketable equity securities 142,087 142,087 Available-for-sale debt securities 26,745 26,745 Long-term debt, including current portion 2,379,826 2,570,206 At May 31, 2020 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 233,416 $ 233,416 Marketable equity securities 87,111 87,111 Available-for-sale debt securities 26,922 26,922 Long-term debt, including current portion 2,539,180 2,618,719

Derivatives and Hedging

Derivatives and Hedging	12 Months Ended
Derivatives and Hedging	May 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives and Hedging	NOTE F — 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. Derivatives Designated as Hedges 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 paid 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 had a maturity date of November 2022. This effectively converted a portion of our U.S. Dollar denominated fixed-rate debt to Euro denominated variable rate debt. The fair value hedge was recognized at fair value in our Consolidated Balance Sheets, while changes in the fair value of the hedge were 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. In February 2020, the fair value hedge and two cross currency swaps agreements were terminated, and we received cash in the amount of $9.3 million, representing the fair value of the swap and interest accrued through the date of termination. Accordingly, hedge accounting was discontinued and a hedge accounting adjustment to our Senior Notes of $1.5 million was recorded and is being amortized to interest expense in the Consolidated Statements of Operations through the termination of the 3.450% Notes in November 2022. Changes in the fair value of the cross currency swaps due to spot foreign exchange rates are recorded as cumulative translation adjustment within AOCI and will remain in AOCI until either the sale or substantially complete liquidation of the hedged subsidiaries. Separately, in February 2020, as a means of mitigating the impact of currency fluctuations on our Euro investments in foreign entities, we executed a cash flow hedge and two cross currency swaps, in which we will pay fixed rate interest in Euros and receive variable rate interest in U.S. Dollars with a combined notional amount of approximately €277.73 million ($300 million U.S. Dollar equivalent), and which have a maturity date of February 2023. This effectively converts our U.S. Dollar denominated variable rate debt to Euro denominated fixed rate debt. The cash flow hedge is recognized at fair value in our Consolidated Balance Sheets, while changes in the fair value of the hedge will be recognized in AOCI when the hedged items affect earnings. Amounts recognized in AOCI will be recognized in earnings in interest expense when the hedged interest payment is accrued. 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 AOCI to offset the changes in the values of the net investments being hedged. In addition, in February 2020, as a means of mitigating the variability of the functional-currency-equivalent cash flows associated with the U.S. Dollar denominated term loan facility (referred to as Foreign Borrower’s Term Loan), we executed a cash flow hedge, in which we will pay fixed rate interest in Euros and receive variable rate interest in U.S. Dollars with a notional amount of approximately €92.52 million ($100 million U.S. Dollar equivalent), and which have a maturity date of February 2023. This effectively converts our U.S. Dollar denominated variable rate debt to Euro denominated fixed rate debt. The cash flow hedge is recognized at fair value in our Consolidated Balance Sheets, while changes in the fair value of the hedge will be recognized in AOCI when the hedged items affect earnings. Amounts recorded in AOCI will be recognized in earnings in interest expense when the hedged interest payment is accrued. In addition, since this currency swap is a hedge of variability of the functional-currency-equivalent cash flows of a recognized liability to be remeasured at spot exchange rates under ASC 830, an amount that will offset the gain or loss arising from the remeasurement of the hedged liability will be reclassified each period from AOCI to earnings as foreign exchange gain/(loss), which is a component of SG&A expenses. The following table summarizes the location and effects of our derivatives instruments on the Consolidated Statements of Comprehensive Income and Consolidated Statements of Income for gains or losses initially recognized in AOCI in the Consolidated Balance Sheet: Pretax gain/(loss) recognized in AOCI Pretax gain/(loss) reclassified from AOCI into income (In thousands) Year Ended May 31, Year Ended May 31, Derivatives in hedging relationships 2021 2020 2019 Income Statement Location 2021 2020 2019 Interest Rate Swap (Cash Flow) $ (1,226 ) $ (7,998 ) $ - Interest (Expense) Income $ (3,380 ) $ 170 $ - Cross Currency Swap (Cash Flow) (9,207 ) (2,254 ) - Interest Income 638 554 - Cross Currency Swap (Cash Flow) - - - Foreign Exchange (Loss) (9,874 ) (2,654 ) - Cross Currency Swap (Net Investment) (31,380 ) 1,866 4,998 Gain or (loss) on sale of subsidiary - - - Total $ (41,813 ) $ (8,386 ) $ 4,998 $ (12,616 ) $ (1,930 ) $ - Derivatives Not Designated as Hedges At May 31, 2021 and 2020, we held one foreign currency forward contract at each period end 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 the contracts are recognized in earnings as a component of SG&A expenses. Amounts recognized in earnings did not have a material impact on our Consolidated Financial Statements for any period presented. As of May 31, 2021, and May 31, 2020, the notional amounts of the forward contract held to purchase foreign currencies was $191.7 million and $63.2 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 May 31, 2021 and May 31, 2020 are as follows: (In thousands) Fair Value Derivatives Designated as Hedging Instruments Balance Sheet Location May 31, 2021 May 31, 2020 Assets: Cross Currency Swap (Net Investment) Other Current Assets $ 6,233 $ 5,352 Cross Currency Swap (Cash Flow) Other Current Assets 516 750 Cross Currency Swap (Net Investment) Other Assets (Long-Term) - 12,409 Liabilities: Interest Rate Swap (Cash Flow) Other Accrued Liabilities 3,547 2,981 Cross Currency Swap (Net Investment) Other Accrued Liabilities 1,321 294 Cross Currency Swap (Net Investment) Other Long-Term Liabilities 39,228 18,204 Cross Currency Swap (Cash Flow) Other Long-Term Liabilities 13,786 3,608 Interest Rate Swap (Cash Flow) Other Long-Term Liabilities 2,467 5,187 (In thousands) Fair Value Derivatives Not Designated as Hedging Instruments Balance Sheet Location May 31, 2021 May 31, 2020 Assets: Foreign Currency Exchange Other Current Assets $ 212 $ - Liabilities: Foreign Currency Exchange Other Accrued Liabilities - 53

Borrowings

Borrowings	12 Months Ended
Borrowings	May 31, 2021
Debt Disclosure [Abstract]
Borrowings	NOTE G — BORROWINGS A description of long-term debt follows: May 31, 2021 2020 (In thousands) Revolving credit facility with a syndicate of banks, through October 31, 2023(1) $ 336,996 $ 419,317 Accounts receivable securitization program with two banks, through May 21, 2024 (2) - 79,756 Unsecured 3.45% senior notes due November 15, 2022 (3) 300,387 300,615 Unsecured $100M Term Loan due February 21, 2023 (4) 99,880 99,810 Unsecured $300M Term Loan due February 21, 2023 (4) 299,640 299,431 Unsecured 3.75% notes due March 15, 2027 (5) 397,527 397,058 Unsecured 4.55% senior notes due March 1, 2029 (6) 346,904 346,514 Unsecured 5.25% notes due June 1, 2045 (7) 298,745 298,668 Unsecured 4.25% notes due January 15, 2048 (8) 296,714 296,590 Other obligations, including finance leases and unsecured notes payable at various rates of interest due in installments through 2027 3,033 1,421 2,379,826 2,539,180 Less: current portion 1,282 80,890 Total Long-Term Debt, Less Current Maturities $ 2,378,544 $ 2,458,290 (1) Interest at May 31, 2021 was tied to LIBOR and averaged 1.4609% for USD denominated debt ($37.7 million), 1.3950% for AUD denominated debt ($44.0 million) and 1.3750% on EUR denominated debt ($257.9 million). Interest at May 31, 2020 was tied to LIBOR and averaged 1.5505% for USD denominated debt ($218.3 million), 1.4650% for AUD denominated debt ($37.2 million) and 1.3750% on EUR denominated debt ($167.5 million). At May 31, 2021 and 2020, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $3.7 million, respectively. (2) At May 31, 2020, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.2 million, respectively. (3) The $300.0 million face amount of the notes due 2022 is adjusted for the amortization of the original issue discount and mark-to-market derivative asset of approximated $0.1 million and ($0.8 million) at May 31, 2021 and approximated $0.1 million and ($1.3 million) at May 31, 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.465%. At May 31, 2021 and 2020, the notes are reduced by debt issuance costs, net of amortization, for approximately $0.4 million and $0.6 million, respectively. (4) At May 31, 2021 and 2020, the Term Loan is adjusted for deferred financing fees, net of amortization, of approximately $0.5 million and $0.8 million, respectively. (5) The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.3 million and $2.6 million, respectively. (6) The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.4 million and $0.5 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568% (7) The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.4 million at May 31, 2021 and 2020. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.9 million at May 31, 2021 and 2020. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $2.9 million, respectively. (8) The $ 300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $ 3.3 million and $ 3.4 million at May 31, 2021 and 2020, respectively. The effective interest rate on the notes is 4.25 %. The aggregate maturities of long-term debt for the five years subsequent to May 31, 2021 are as follows: fiscal 2022 — $1.4 million; fiscal 2023 — $701.5 million; fiscal 2024 — $340.2 million; fiscal 2025 — $0.5 million; fiscal 2026 — $0.3 million and thereafter $1,350.9 million. Additionally, at May 31, 2021, we had unused lines of credit totaling $1.2 billion. Our available liquidity, including our cash and cash equivalents and amounts available under our committed credit facilities, stood at $1,457.1 million at May 31, 2021. Our debt-to-capital ratio was 57.8% at May 31, 2021, compared with 66.8% at May 31, 2020. Revolving Credit Agreement During the quarter ended November 30, 2018, we replaced our previous $800.0 million revolving credit agreement, which was set to expire on December 5, 2019, with a $1.3 billion unsecured syndicated revolving credit facility (the “Revolving Credit Facility”), which expires on October 31, 2023. The Revolving Credit Facility includes sublimits for the issuance of swingline loans, which are comparatively short-term loans used for working capital purposes and letters of credit. The aggregate maximum principal amount of the commitments under the Revolving Credit Facility may be expanded upon our request, subject to certain conditions, up to $1.5 billion. The Revolving Credit Facility is available to refinance existing indebtedness, to finance working capital and capital expenditures, and for general corporate purposes. The Revolving Credit Facility requires us to comply with various customary affirmative and negative covenants, including a leverage covenant (i.e., Net Leverage Ratio) and interest coverage ratio, which are calculated in accordance with the terms as defined by the Revolving Credit Facility. On April 30, 2020, we amended both our Revolving Credit Facility and the New Credit Facility (see “Term Loan Facility Credit Agreement” section below for further details) to allow the maximum permitted Net Leverage Ratio to be increased from 3.75 to 1.0 to 4.25 to 1.0 for four consecutive fiscal quarters following notice to the Administrative Agent on or before June 30, 2021 and the payment of a ten basis point fee (“Increased Net Leverage Ratio Period”). Such increase is in addition to any increase requested by us in the maximum permitted Net Leverage Ratio following a Material Acquisition (any acquisition for which the aggregate consideration is $100.0 million or greater). During an Increased Net Leverage Ratio Period, the Euro-Rate Spread on loans under the Revolving Credit Facility shall be increased to 1.75% and the Base Rate Spread shall be 0.75% until the first day of the month following the Increased Net Leverage Ratio Period; provided, however, if at any time during an Increased Net Leverage Ratio, all three rating agencies rate the Company as non-investment grade, the Euro-Rate Spread shall be 2.0% and the Base Rate Spread shall be 1.0% in each case until earlier of the first day of the month after the Increased Net Leverage Ratio or the date on which at least one rating agency rates us as investment grade. As of May 31, 2021, we have not provided any notice to the Administrative Agent to trigger this provision. Furthermore, no such notice was provided, subsequent to the balance sheet date, on or before June 30, 2021, and as such, this provision has lapsed. Under the terms of the leverage covenant, we may not permit our leverage ratio for total indebtedness to consolidated EBITDA for the four most recent fiscal quarters to exceed 3.75 to 1.0. During certain periods and per the terms of the Revolving Credit Facility, this ratio may be increased to 4.25 to 1.0 in connection with certain “material acquisitions,” or under the Increased Net Leverage Ratio Period. The acquisition of Ali Industries, LLC which occurred on September 1, 2020 and qualified as a “material acquisition,” which enables us to request an increase in the maximum permitted Net Leverage Ratio covenant. We provided such notice to our Administrative Agent during our second quarter of fiscal 2021, and therefore, our Net Leverage Ratio covenant has been increased to 4.25 to 1.0 through August 31, 2021. The minimum required consolidated interest coverage ratio for EBITDA to interest expense is 3.50 to 1. The interest coverage ratio is calculated at the end of each fiscal quarter for the four fiscal quarters then ended using EBITDA as defined in the Revolving Credit Facility. As of May 31, 2021, we were in compliance with all financial covenants contained in our Revolving Credit Facility, including the leverage and interest coverage ratio covenants. At that date, our leverage ratio was 2.17 to 1, while our interest coverage ratio was 12.24 to 1. Our available liquidity under our Revolving Credit Facility stood at $960.4 million at May 31, 2021. Our access to funds under our Revolving Credit Facility is dependent on the ability of the financial institutions that are parties to the Revolving Credit Facility to meet their funding commitments. Those financial institutions may not be able to meet their funding commitments if they experience shortages of capital and liquidity or if they experience excessive volumes of borrowing requests within a short period of time. Moreover, the obligations of the financial institutions under our Revolving Credit Facility are several and not joint and, as a result, a funding default by one or more institutions does not need to be made up by the others. Accounts Receivable Securitization Program On May 9, 2014, we entered into a $200.0 million accounts receivable securitization facility (the “AR Program”) which was subsequently amended on May 22, 2020 to a maximum availability of $250.0 million and an extended facility termination date of May 21, 2021. On March 18, 2021, we amended the AR Program to a maximum availability of $250 million during all borrowing periods and an extended facility termination date of May 21, 2024 . The AR Program was entered into pursuant to (1) a second amended and restated receivables sales agreement, dated as of May 9, 2014, and subsequently amended on August 29, 2014; November 3, 2015; December 31, 2016; March 31, 2017 ; and June 5, 2020 (the “Sale Agreement”), among certain of our subsidiaries (the “Originators”), and RPM Funding Corporation, a special purpose entity (the “SPE”) whose voting interests are wholly owned by us, and (2) an amended and restated receivables purchase agreement, dated as of May 9, 2014 and subsequently amended on February 25, 2015 and May 2, 2017 , May 22, 2020 and March 18, 2021 (the “Purchase Agreement”), among the SPE, certain purchasers from time to time party thereto (the “Purchasers”), and PNC Bank, National Association as administrative agent. Under the Sale Agreement, the Originators may, during the term thereof, sell specified accounts receivable to the SPE, which may in turn, pursuant to the Purchase Agreement, transfer an undivided interest in such accounts receivable to the Purchasers. Once transferred to the SPE, such receivables are owned in their entirety by the SPE and are not available to satisfy claims of our creditors or creditors of the originating subsidiaries until the obligations owing to the participating banks have been paid in full. We indirectly hold a 100% economic interest in the SPE and will, along with our subsidiaries, receive the economic benefit of the AR Program. The transactions contemplated by the AR Program do not constitute a form of off-balance sheet financing and will be fully reflected in our financial statements. The maximum availability under the AR Program is $250.0 million. Availability is further subject to changes in the credit ratings of our customers, customer concentration levels or certain characteristics of the accounts receivable being transferred and, therefore, at certain times, we may not be able to fully access the $250.0 million of funding available under the AR Program. As of May 31, 2021, there was no outstanding balance under the AR Program, which compares with the maximum availability on that date of $250.0 million. The interest rate under the Purchase Agreement is based on the Alternate Base Rate, LIBOR Market Index Rate, one-month LIBOR or LIBOR for a specified tranche period, as selected by us, plus in each case, a margin of 0.85%. In addition, as set forth in an Amended and Restated Fee Letter, dated March 18, 2021 (the “Fee Letter”), the SPE is obligated to pay a monthly unused commitment fee to the Purchasers based on the daily amount of unused commitments under the Agreement, which ranges from 0.30% to 0.50% based on usage. The AR Program contains various customary affirmative and negative covenants and also contains customary default and termination provisions. Our failure to comply with the covenants described above and other covenants contained in the Revolving Credit Facility section above could result in an event of default under that agreement, entitling the lenders to, among other things, declare the entire amount outstanding under the Revolving Credit Facility to be due and payable. The instruments governing our other outstanding indebtedness generally include cross-default provisions that provide that, under certain circumstances, an event of default that results in acceleration of our indebtedness under the Revolving Credit Facility will entitle the holders of such other indebtedness to declare amounts outstanding immediately due and payable. 3.45% Notes due 2022 On October 23, 2012, we sold $300 million aggregated principal amount of 3.45% Notes due 2022. The net proceeds of $297.7 million from this offering were used to repay short-term borrowings outstanding under our revolving credit facility. Term Loan Facility Credit Agreement On February 21, 2020, we and our subsidiary, RPM Europe Holdco B.V. (formerly “RPM New Horizons Netherlands, B.V”). (the “Foreign Borrower”), entered into an unsecured syndicated term loan facility credit agreement (the “New Credit Facility”) with the lenders party thereto and PNC Bank, National Association, as administrative agent for the lenders. The New Credit Facility provides for a $300 million term loan to us and a $100 million term loan to the Foreign Borrower (together, the “Term Loans”), each of which was fully advanced on the closing date. The Term Loans mature on February 21, 2023, with no scheduled amortization before that date, and the Term Loans may be prepaid at any time without penalty or premium. We agreed to guarantee all obligations of the Foreign Borrower under the New Credit Facility. The proceeds of the Term Loans were used to repay a portion of the outstanding borrowings under our revolving credit facility. During fiscal 2021, the New Credit Facility was amended to replace RPM New Horizons Netherlands, B.V. with RPM Europe Holdco B.V. The Term Loans will bear interest at either the base rate or the Eurodollar Rate, at our option, plus a spread determined by our debt rating. We, and the Foreign Borrower, have entered into multicurrency floating to fixed interest rate swap agreements that effectively fix interest payment obligations on the entire principal amount of the Term Loans through their maturity at (a) 0.612% per annum on our Term Loan, and (b) 0.558% per annum on the Foreign Borrower’s Term Loan. The New Credit Facility contains customary covenants, including but not limited to, limitations on our ability, and in certain instances, our subsidiaries’ ability, to incur liens, make certain investments, or sell or transfer assets. Additionally, we may not permit (i) our consolidated interest coverage ratio to be less than 3.5 to 1.0, or (ii) our leverage ratio (defined as the ratio of total indebtedness, less unencumbered cash and cash equivalents in excess of $50 million, to consolidated EBITDA for the four most recent fiscal quarters) to exceed 3.75 to 1.0. Upon notification to the lenders, however, the maximum permitted leverage ratio can be relaxed to 4.25 to 1.0 for a one-year period in connection with certain material acquisitions. In addition, the agreement was amended on April 30, 2020 to allow the maximum permitted Net Leverage Ratio to be increased to 4.25 to 1 during certain periods (refer to the “Revolving Credit Agreement”). As noted in the “Revolving Credit Agreement” above, we provided notice to our Administrative Agent during our second quarter of fiscal 2021, and therefore, our Net Leverage Ratio covenant has been increased to 4.25 to 1.0 through August 31, 2021. The covenants contained in the New Credit Facility are substantially similar to those contained in our Revolving Credit Facility. See “Revolving Credit Agreement” above for details on our compliance with all significant financial covenants at May 31, 2021. 5.250% Notes due 2045 and 3.750% Notes due 2027 On March 2, 2017, we issued $50.0 million aggregate principal amount of 5.250% Notes due 2045 (the “2045 Notes”) and $400.0 million aggregate principal amount of 3.750% Notes due 2027 (the “2027 Notes”). The 2045 Notes are a further issuance of the $250 million aggregate principal amount of 5.250% Notes due 2045 initially issued by us on May 29, 2015. Interest on the 2045 Notes is payable semiannually in arrears on June 1st and December 1st of each year at a rate of 5.250% per year. The 2045 Notes mature on June 1, 2045. Interest on the 2027 Notes is payable semiannually in arrears on March 15th and September 15th of each year, at a rate of 3.750% per year. The 2027 Notes mature on March 15, 2027. The indenture governing this indebtedness includes cross-acceleration provisions. Under certain circumstances, where an event of default under our other instruments results in acceleration of the indebtedness under such instruments, holders of the indebtedness under the indenture are entitled to declare amounts outstanding immediately due and payable. 4.550% Notes due 2029 On February 27, 2019, we closed an offering for $350.0 million aggregate principal amount of 4.550% Notes due 2029 (the “2029 Notes”). The proceeds from the 2029 Notes were used to repay a portion of the outstanding borrowings under our revolving credit facility and for general corporate purposes. Interest on the 2029 Notes accrues from February 27, 2019 and is payable semiannually in arrears on March 1 st st 4.250% Notes due 2048 On December 20, 2017, we closed an offering for $300.0 million aggregate principal amount of 4.250% Notes due 2048 (the “2048 Notes”). The proceeds from the 2048 Notes were used to repay $250.0 million in principal amount of unsecured 6.50% senior notes due February 15, 2018, and for general corporate purposes. Interest on the 2048 Notes accrues from December 20, 2017 and is payable semiannually in arrears on January 15 th th

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	May 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	NOTE H — INCOME TAXES The provision for income taxes is calculated in accordance with ASC 740, which requires the recognition of deferred income taxes using the asset and liability method. Income before income taxes as shown in the Consolidated Statements of Income is summarized below for the periods indicated. Year Ended May 31, 2021 2020 2019 (In thousands) United States $ 462,468 $ 317,290 $ 215,201 Foreign 205,970 90,474 124,644 Income Before Income Taxes $ 668,438 $ 407,764 $ 339,845 Provision (benefit) for income taxes consists of the following for the periods indicated: Year Ended May 31, 2021 2020 2019 (In thousands) Current: U.S. federal $ 60,666 $ 65,195 $ 20,388 State and local 18,959 17,743 8,623 Foreign 65,125 31,894 37,713 Total Current 144,750 114,832 66,724 Deferred: U.S. federal 20,027 (19,212 ) 15,298 State and local 3,878 (3,031 ) 1,414 Foreign (3,717 ) 10,093 (11,278 ) Total Deferred 20,188 (12,150 ) 5,434 Provision for Income Taxes $ 164,938 $ 102,682 $ 72,158 The significant components of deferred income tax assets and liabilities as of May 31, 2021 and 2020 were as follows: 2021 2020 (In thousands) Deferred income tax assets related to: Inventories $ 12,189 $ 12,341 Allowance for losses - 4,294 Accrued compensation and benefits 24,637 14,686 Accrued other expenses 28,511 15,107 Deferred income and other long-term liabilities 22,859 22,030 Credit and net operating and capital loss carryforwards 65,091 65,994 Net unrealized loss on securities 9,189 16,892 Pension and other postretirement benefits 34,180 76,147 Total Deferred Income Tax Assets 196,656 227,491 Less: valuation allowances (64,696 ) (66,855 ) Net Deferred Income Tax Assets 131,960 160,636 Deferred income tax (liabilities) related to: Depreciation (85,717 ) (70,588 ) Amortization of intangibles (107,963 ) (109,926 ) Unremitted foreign earnings (17,871 ) (8,781 ) Total Deferred Income Tax (Liabilities) (211,551 ) (189,295 ) Deferred Income Tax Assets (Liabilities), Net $ (79,591 ) $ (28,659 ) At May 31, 2021, we had U.S. capital loss carryforwards of approximately $25.8 million, of which $21.5 million will expire if not used by the end of fiscal 2022, with the balance expiring if unused by the end of fiscal 2025. Also, as of May 31, 2021, we had foreign tax credit carryforwards of $27.3 million, which expire through fiscal 2031. Additionally, as of May 31, 2021, we had approximately $4.5 million of tax benefits associated with state net operating loss carryforwards and state tax credit carryforwards, some of which expire at various dates beginning in fiscal 2022. Also, as of May 31, 2021, we had foreign net operating loss carryforwards of approximately $149.4 million, of which approximately $14.7 million will expire at various dates beginning in fiscal 2022 and approximately $134.7 million that have an indefinite carryforward period. Additionally, as of May 31, 2021, we had foreign capital loss carryforwards of approximately $26.8 million that can be carried forward indefinitely. When evaluating the realizability of deferred income tax assets, we consider, among other items, whether a jurisdiction has experienced cumulative pretax losses and whether a jurisdiction will generate the appropriate character of income to recognize a deferred income tax asset. More specifically, if a jurisdiction experiences cumulative pretax losses for a period of three years, including the current fiscal year, or if a jurisdiction does not have sufficient income of the appropriate character in the relevant carryback or projected carryforward periods, we generally conclude that it is more likely than not that the respective deferred tax asset will not be realized unless factors such as expected operational changes, availability of prudent and feasible tax planning strategies, reversal of taxable temporary differences or other information exists that would lead us to conclude otherwise. If, after we have evaluated these factors, the deferred income tax assets are not expected to be realized within the carryforward or carryback periods allowed for that jurisdiction, we would conclude that a valuation allowance is required. Total valuation allowances of approximately $64.7 million and $66.9 million have been recorded as of May 31, 2021 and 2020, respectively. These recorded valuation allowances relate primarily to U.S. capital losses, state net operating losses and certain foreign net operating losses, net foreign deferred tax assets and foreign tax credit carryforwards. The year-over-year decrease in valuation allowances is primarily attributable to reversals for the realization of U.S. capital loss carryforwards, partially offset by an increase for foreign tax credit carryforwards. The following table reconciles income tax expense (benefit) computed by applying the U.S. statutory federal income tax rate against income (loss) before income taxes to the provision (benefit) for income taxes: Year Ended May 31, 2021 2020 2019 (In thousands, except percentages) Income tax expense at the U.S. statutory federal income tax rate $ 140,372 $ 85,630 $ 71,367 Foreign rate differential and other foreign tax adjustments 11,942 3,433 (1,571 ) State and local income taxes, net 18,625 11,651 7,224 Impact of GILTI provisions 1,598 3,051 5,772 Nondeductible business expense 616 2,005 2,259 Valuation allowance (4,389 ) 14,008 7,021 Deferred tax liability for unremitted foreign earnings 5,348 (5,527 ) - Changes in unrecognized tax benefits (1,847 ) 1,292 (8,480 ) Other 1,324 (3,351 ) 1,195 FY19 GILTI impact of issued regulations - (4,348 ) - Equity-based compensation (8,651 ) (5,162 ) (4,496 ) Transition tax liability - - (1,868 ) Remeasurement of U.S. deferred income taxes - - (6,265 ) Provision for Income Tax Expense $ 164,938 $ 102,682 $ 72,158 Effective Income Tax Rate 24.7 % 25.2 % 21.2 % Uncertain income tax positions are accounted for in accordance with ASC 740. The following table summarizes the activity related to unrecognized tax benefits: (In millions) 2021 2020 2019 Balance at June 1 $ 9.0 $ 8.1 $ 14.1 Additions based on tax positions related to current year - - 0.1 Additions for tax positions of prior years - 2.0 2.0 Reductions for tax positions of prior years (1.8 ) (0.9 ) (7.9 ) Foreign currency translation 0.3 (0.2 ) (0.2 ) Balance at May 31 $ 7.5 $ 9.0 $ 8.1 The total amount of unrecognized tax benefits that would impact the effective tax rate, if recognized, was $7.0 million at May 31, 2021, $8.6 million at May 31, 2020 and $7.7 million at May 31, 2019. We recognize interest and penalties related to unrecognized tax benefits in income tax expense. At May 31, 2021, 2020 and 2019, the accrual for interest and penalties was $2.9 million, $2.9 million and $3.0 million, respectively. Unrecognized tax benefits, including interest and penalties, have been classified as other long-term liabilities unless expected to be paid in one year. We file income tax returns in the United States and in various state, local and foreign jurisdictions. With limited exceptions, we are subject to federal, state and local, or non-U.S. income tax examinations by tax authorities for fiscal 2014 through 2021. We are currently under examination, or have been notified of an upcoming tax examination, for various non-U.S. and domestic state and local jurisdictions. Although it is possible that certain tax examinations could be resolved during the next 12 months, the timing and outcomes are uncertain. Our deferred tax liability for unremitted foreign earnings was $17.9 million as of May 31, 2021, which represents our estimate of the tax cost associated with the deemed remittance of $466.6 million of foreign earnings that are not considered to be permanently reinvested. We have not provided for U.S. income taxes or foreign withholding taxes on the remaining $1.2 billion of foreign unremitted earnings because such earnings have been retained and reinvested by the foreign subsidiaries as of May 31, 2021. Accordingly, no provision has been made for U.S. income taxes or foreign withholding taxes, which may become payable if the remaining unremitted earnings of foreign subsidiaries were distributed to the United States. Due to the uncertainties and complexities involved in the various options for repatriation of foreign earnings, it is not practical to calculate the deferred taxes associated with the remaining foreign earnings.

Stock Repurchase Program

Stock Repurchase Program	12 Months Ended
Stock Repurchase Program	May 31, 2021
Equity [Abstract]
Stock Repurchase Program	NOTE I — 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. As announced on November 28, 2018, our goal was to return $1.0 billion in capital to stockholders by May 31, 2021 through share repurchases and the retirement of our convertible note during fiscal 2019. On April 16, 2019, after taking into account share repurchases under our existing stock repurchase program to date, and the impact of retiring our convertible note, our Board of Directors authorized the repurchase of the remaining $600.0 million in value of RPM International Inc. common stock by May 31, 2021. As a result, 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. As previously announced, given macroeconomic uncertainty resulting from the Covid pandemic, we had suspended stock repurchases under the program. In January 2021, our Board of Directors authorized the resumption of stock repurchases under the stock repurchase program. At the time of resuming the program, $469.7 million of shares of common stock remained available for repurchase. The Board of Directors also extended the stock repurchase program beyond its original May 31, 2021 expiration date until such time that the remaining $469.7 million of shares of capital has been returned to our stockholders. During the fiscal year ended May 31, 2021, we repurchased 594,061 shares of our common stock at a cost of approximately $50.0 million, or an average cost of $84.09 per share, under this program. During the fiscal year ended May 31, 2020, we repurchased 2,041,847 shares of our common stock at a cost of approximately $125.0 million, or an average cost of $61.22 per share, under this program. During the fiscal year ended May 31, 2019, we repurchased 3,286,907 shares of our common stock at a cost of approximately $200.2 million, or an average cost of $60.92 per share, under this program. The maximum dollar amount that may yet be repurchased under our stock repurchase program was approximately $419.8 million at May 31, 2021.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
Stock-Based Compensation	May 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	NOTE J — STOCK-BASED COMPENSATION Stock-based compensation represents the cost related to stock-based awards granted to our employees and directors; these awards include restricted stock, restricted stock units, performance stocks, performance stock units and SARs. We grant stock-based incentive awards to our employees and our directors under various share-based compensation plans. The plan that is active or provides for stock option grants or share-based payment awards is the Amended and Restated 2014 Omnibus Equity and Incentive Plan (the “2014 Omnibus Plan”), which includes provisions for grants of restricted stock, restricted stock units, performance stock, performance stock units and SARs. Other plans, which provide for restricted stock grants only, include the 2003 Restricted Stock Plan for Directors (the “2003 Plan”) and the 2007 Restricted Stock Plan (the “2007 Plan”). At May 31, 2021, the shares available for grant out of the 2003 Plan and the 2007 Plan have been exhausted, and all future grants will be issued from the 2014 Omnibus Plan. We measure stock-based compensation cost at the date of grant, based on the estimated fair value of the award. We recognize the cost as expense on a straight-line basis (net of estimated forfeitures) over the related vesting period. The following table represents total stock-based compensation expense included in our Consolidated Statements of Income: Year Ended May 31, 2021 2020 2019 (In thousands) Stock-based compensation expense, included in SG&A $ 40,926 $ 19,789 $ 31,154 Stock-based compensation expense, included in restructuring expense 47 116 4,283 Total stock-based compensation cost 40,973 19,905 35,437 Income tax (benefit) (6,877 ) (2,784 ) (6,937 ) Total stock-based compensation cost, net of tax $ 34,096 $ 17,121 $ 28,500 SARs SARs are awards that allow our employees to receive shares of our common stock at a fixed price. We grant SARs at an exercise price equal to the stock price on the date of the grant. The fair value of SARs granted is estimated as of the date of grant using a Black-Scholes option-pricing model. The Black-Scholes option-pricing model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The expected life of options granted is derived from the input of the option-pricing model and represents the period of time that options granted are expected to be outstanding. Expected volatility rates are based on historical volatility of shares of our common stock. The following is a summary of our weighted-average assumptions related to SARs grants made during the last three fiscal years: Year Ended May 31, 2021 2020 2019 Risk-free interest rate 0.4 % 1.9 % 2.9 % Expected life of option 6.5 yrs 6.5 yrs 6.5 yrs Expected dividend yield 1.8 % 2.3 % 2.1 % Expected volatility rate 24.0 % 22.4 % 25.2 % The 2014 Omnibus Plan was approved by our stockholders on October 9, 2014, and amendments to the 2014 Omnibus Plan were subsequently approved by our stockholders in 2018 and 2019. The 2014 Omnibus Plan provides us with the flexibility to grant a wide variety of stock and stock-based awards, as well as dollar-denominated performance-based awards, and is intended to be the primary stock-based award program for covered employees. SARs are issued at fair value at the date of grant, have up to ten-year The following tables summarize option and share-based payment activity (including SARs) under these plans during the fiscal year ended May 31, 2021: 2021 Share-Based Payments Weighted Average Exercise Price Number of Shares Under Option (Shares in thousands) Balance at June 1, 2020 $ 49.88 2,482 Options granted 78.49 360 Options exercised 39.69 (837 ) Balance at May 31, 2021 59.28 2,005 Exercisable at May 31, 2021 $ 52.56 1,107 SARs 2021 2020 2019 (In thousands, except per share amounts) Weighted-average grant-date fair value per SAR $ 14.38 $ 11.59 $ 14.08 Intrinsic value of options exercised $ 8.80 $ 9.62 $ 9.29 Tax benefit from options exercised $ 8,821 $ 5,936 $ 3,210 Fair value of SARS vested $ 12.59 $ 12.27 $ 9.30 At May 31, 2021, the aggregate intrinsic value and weighted-average remaining contractual life of options outstanding was $68.7 million and 6.55 years, respectively, while the aggregate intrinsic value and weighted-average remaining contractual life of options exercisable was $45.4 million and 5.27 years, respectively. At May 31, 2021, the total unamortized stock-based compensation expense related to SARs that were previously granted was $7.8 million, which is expected to be recognized over 2.42 years. We anticipate that approximately 2.0 million shares at a weighted-average exercise price of $59.26 and a weighted-average remaining contractual term of 6.5 years will ultimately vest under these plans. Restricted Stock Plans We also grant stock-based awards, which may be made in the form of restricted stock, restricted stock units, performance stock and performance stock units. These awards are granted to eligible employees or directors, and entitle the holder to shares of our common stock as the award vests. The fair value of the awards is determined and fixed based on the stock price at the date of grant. A description of our restricted stock plans follows. Under the 2014 Omnibus Plan, a total of 6,000,000 shares of our common stock may be subject to awards. Of those issuable shares, up to 3,000,000 shares of common stock may be subject to “full-value” awards. In October 2019, shareholders approved an amendment to the 2014 Omnibus Plan making an additional 5,000,000 shares of common stock subject to awards. Of those additional issuable shares, 2,250,000 shares may be subject to “full-value” awards similar to those issued under the 2014 Omnibus Plan. The following table summarizes the share-based performance-earned restricted stock (“PERS”) and performance stock units (“PSUs”) activity during the fiscal year ended May 31, 2021: Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 60.51 865 Shares granted 80.67 427 Shares forfeited 65.24 (18 ) Shares vested 53.69 (158 ) Balance at May 31, 2021 $ 69.13 1,116 The weighted-average grant-date fair value was $80.67, $63.52 and $60.36 for the fiscal years ended May 31, 2021, 2020 and 2019, respectively. The restricted stock and performance stock cliff vest after three years. Nonvested restricted shares of common stock under the 2014 Omnibus Plan are eligible for dividend payments, while performance stock units are not eligible for dividend payments. At May 31, 2021, remaining unamortized deferred compensation expense for performance-earned restricted stock totaled $18.7 million. The remaining amount is being amortized over the applicable vesting period for each participant. On October 3, 2018, our Compensation Committee granted in the aggregate 192,000 Performance Stock Units (the “2018 PSUs”) to certain executives at a weighted-average grant-date price of $60.50 per PSU. The awards are contingent upon the level of attainment of performance goals for the three-year three-year On July 18, 2019, our Compensation Committee granted in the aggregate 178,000 Performance Stock Units (the “2019 PSUs”) to certain executives at a weighted-average grant-date price of $62.17 per PSU. The awards are contingent upon the level of attainment of performance goals for the three-year three-year On July 22, 2020, our Compensation Committee granted in the aggregate 225,500 Performance Stock Units (the “2020 PSUs”) to certain executives at a weighted-average grant-date price of $78.49 per PSU. The awards are contingent upon the level of attainment of performance goals for the three-year three-year Compensation cost for these awards has been recognized on a straight-line basis over the related performance period, with consideration given to the probability of attaining the performance goals. As of May 31, 2021, there were 225,500 “ 2020 PSUs ” outstanding and $ 24.3 million unamortized stock-based compensation, which is expected to be recognized over a weighted average period of 2.0 years . The 2003 Plan was approved on October 10, 2003 by our stockholders, and was established primarily for the purpose of recruiting and retaining directors, and to align the interests of directors with the interests of our stockholders. Only directors who are not our employees are eligible to participate. Under the 2003 Plan, up to 500,000 shares of our common stock may be awarded, with awards cliff vesting over a three-year Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 60.25 62 Shares granted to directors 87.35 19 Shares vested 56.02 (25 ) Balance at May 31, 2021 $ 71.19 56 The weighted-average grant-date fair value was $87.35, $67.26 and $60.50 for the fiscal years ended May 31, 2021, 2020 and 2019, respectively. Unamortized deferred compensation expense relating to restricted stock grants for directors of $2.0 million at May 31, 2021, is being amortized over the applicable remaining vesting period for each director. Nonvested restricted shares of common stock under the 2003 Plan are eligible for dividend payments. At May 31, 2021, the shares available for grant out of the 2003 Plan have been exhausted, and all future grants will be issued from the 2014 Omnibus Plan. During fiscal 2021, a total of 35,102 shares were awarded under the 2014 Omnibus Plan to certain employees as supplemental retirement benefits, generally subject to forfeiture. The shares vest upon the latter of attainment of age 55 and the fifth anniversary of the May 31 st Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 33.82 446 Shares granted 78.49 35 Shares exercised 33.25 (63 ) Balance at May 31, 2021 $ 37.89 418 The weighted-average grant-date fair value was $78.49, $62.17 and $60.01 for the fiscal years ended May 31, 2021, 2020 and 2019, respectively. As noted above, as of May 31, 2021, no shares remain available for future grant under the 2007 Plan, and future issuances of shares as supplemental retirement benefits are made under the 2014 Omnibus Plan. At May 31, 2021, unamortized stock-based compensation expense of $0.2 million and $4.7 million relating to the 2007 Plan and the 2014 Omnibus Plan, respectively, are being amortized over the applicable vesting period associated with each participant. The following table summarizes the activity for all nonvested restricted shares during the year ended May 31, 2021: Weighted-Average Grant-Date Fair Number of Value Shares (Shares in thousands) Balance at June 1, 2020 $ 58.03 1,120 Granted 80.77 481 Vested 49.95 (250 ) Forfeited 65.24 (18 ) Balance at May 31, 2021 $ 67.65 1,333 The remaining weighted-average contractual term of nonvested restricted shares at May 31, 2021 is the same as the period over which the remaining cost of the awards will be recognized, which is approximately 2.27 years. The fair value of the nonvested restricted share awards have been calculated using the market value of the shares on the date of issuance. For the years ended May 31, 2021, 2020 and 2019, the weighted-average grant-date fair value for restricted share grants was $80.77, $63.62 and $60.34, respectively. The total fair value of shares that vested during the years ended May 31, 2021, 2020 and 2019 was $12.5 million, $20.8 million and $37.8 million, respectively. We anticipate that approximately 1.33 million shares at a weighted-average grant-date fair value of $67.65 and a weighted-average remaining contractual term of 2.27 years will ultimately vest, based upon the unique terms and participants of each plan. 250,329 shares of restricted stock were vested during the year ended May 31, 2021, with 420,571 restricted shares vested during the year ended May 31, 2020. The total intrinsic value of restricted shares converted during the years ended May 31, 2021, 2020 and 2019 was $20.7 million, $26.8 million and $58.1 million, respectively. Total unrecognized compensation cost related to all nonvested awards of restricted shares of common stock was $52.2 million as of May 31, 2021. That cost is expected to be recognized over a weighted-average period of 2.27 years. We did not receive any cash from employees as a result of employee vesting and release of restricted shares for the year ended May 31, 2021.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
Accumulated Other Comprehensive Income (Loss)	May 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	NOTE K — ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Accumulated other comprehensive income (loss) consists of the following components: Pension And Other Postretirement Unrealized Unrealized Foreign Benefit Gain Gain (Loss) Currency Liability (Loss) On On Translation Adjustments, Derivatives, Securities, (In thousands) Adjustments Net of Tax Net of Tax Net of Tax Total Balance at June 1, 2018 $ (300,013 ) $ (157,495 ) $ (131 ) $ (1,409 ) $ (459,048 ) Reclassification adjustments for gains included in net income, net of taxes of $151 - - - 1,777 1,777 Other comprehensive income (73,660 ) (70,785 ) 4,713 307 (139,425 ) Deferred taxes 3,178 16,635 (203 ) (542 ) 19,068 Balance at May 31, 2019 (370,495 ) (211,645 ) 4,379 133 (577,628 ) Reclassification adjustments for gains (losses) included in net income, net of taxes of $0 - - - - - Other comprehensive income (71,820 ) (86,347 ) (6,315 ) 1,210 (163,272 ) Deferred taxes 1,583 20,275 1,865 (320 ) 23,403 Balance at May 31, 2020 (440,732 ) (277,717 ) (71 ) 1,023 (717,497 ) Reclassification adjustments for gains included in net income, net of taxes of $77 - - - 191 191 Other comprehensive income 148,360 113,984 (31,087 ) (1,052 ) 230,205 Deferred taxes (7,993 ) (26,877 ) 7,176 (89 ) (27,783 ) Balance at May 31, 2021 $ (300,365 ) $ (190,610 ) $ (23,982 ) $ 73 $ (514,884 )

Earnings Per Share

Earnings Per Share	12 Months Ended
Earnings Per Share	May 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share	NOTE L — EARNINGS PER SHARE The following table sets forth the reconciliation of the numerator and denominator of basic and diluted earnings per share for the years ended May 31, 2021, 2020 and 2019: Year Ended May 31, 2021 2020 2019 (In thousands, except per share amounts) Numerator for earnings per share: Net income attributable to RPM International Inc. stockholders $ 502,643 $ 304,385 $ 266,558 Less: Allocation of earnings and dividends to participating securities (4,018 ) (1,956 ) (1,514 ) Net income available to common shareholders - basic 498,625 302,429 265,044 Reverse: Allocation of earnings and dividends to participating securities - 1,956 1,514 Add: Undistributed earnings reallocated to unvested shareholders 13 - - Add: Income effect of contingently issuable shares - - 3,655 Net income available to common shareholders - diluted $ 498,638 $ 304,385 $ 270,213 Denominator for basic and diluted earnings per share: Basic weighted average common shares 128,334 128,468 130,552 Average diluted options 593 1,506 1,838 Net issuable common share equivalents (1) - - 1,943 Total shares for diluted earnings per share (2) 128,927 129,974 134,333 Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders: Basic Earnings Per Share of Common Stock $ 3.89 $ 2.35 $ 2.03 Method used to calculate basic earnings per share Two-Class Two-Class Two-Class Diluted Earnings Per Share of Common Stock $ 3.87 $ 2.34 $ 2.01 Method used to calculate diluted earnings per share Two-Class Treasury Treasury (1) Represents the number of shares that would be issued if our contingently convertible notes had been converted. We included these shares in the calculation of diluted EPS as the conversion of the notes were eligible to be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. On November 27, 2018, we redeemed all of our 2.25% convertible senior notes due 2020, primarily for cash, but also issued 598,601 shares of our common stock in the transaction. (2) For the years ended May 31, 2021, 2020 and 2019, approximately 362,016, 340,000 and 862,500 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.

Leases

Leases	12 Months Ended
Leases	May 31, 2021
Leases [Abstract]
Leases	NOTE M — LEASES We have leases for manufacturing facilities, warehouses, office facilities, equipment, and vehicles, which are primarily classified and accounted for as operating leases. We have a small portfolio of finance leases, which are not material to our Consolidated Financial Statements. Some leases include one or more options to renew, generally at our sole discretion, with renewal terms that can extend the lease term from one to five years or more. In addition, certain leases contain termination options, where the rights to terminate are held by either us, the lessor, or both parties. These options to extend or terminate a lease are included in the lease terms when it is reasonably certain that we will exercise that option. We have made an accounting policy election not to recognize ROU assets and lease liabilities for leases with a term of twelve months or less, with no purchase option that we are reasonably certain to exercise. ROU assets and lease liabilities are recognized based on the present value of the fixed and in-substance fixed lease payments over the lease term at the commencement date. The ROU assets also include any initial direct costs incurred and lease payments made at or before the commencement date and are reduced by lease incentives. We use our incremental borrowing rate as the discount rate to determine the present value of the lease payments for leases, as our leases do not have readily determinable implicit discount rates. Our incremental borrowing rate is the rate of interest that we would have to borrow on a collateralized basis over a similar term and amount in a similar economic environment. We determine the incremental borrowing rates for our leases by adjusting the local risk-free interest rate with a credit risk premium corresponding to our credit rating. Operating lease cost is recognized on a straight-line basis over the lease term. Finance lease cost is recognized as a combination of the amortization expense for the ROU assets and interest expense for the outstanding lease liabilities using the discount rate discussed above. The depreciable life of assets and leasehold improvements are limited by the expected lease term, unless there is a transfer of title or purchase option reasonably certain of exercise. Our lease agreements do not contain any significant residual value guarantees or material restrictive covenants. Income from subleases was not significant for any period presented. The following represents our lease costs as of May 31, 2021 and 2020: May 31, 2021 2020 (In thousands) Operating lease expense $ 76,581 $ 73,665 Variable lease expense 9,292 7,243 Short-term lease expense 2,022 2,583 Total rental expense for all operating leases amounted to $64.9 million for the fiscal year ended May 31, 2019. The following represents our supplemental cash flow, balance sheet, and other required disclosures as of May 31, 2021 and 2020: May 31, 2021 2020 (In thousands) Operating cash outflows from operating leases $ 71,257 $ 69,444 Leased assets obtained in exchange for operating lease obligations 69,375 61,614 Current portion of operating leases within Other Accrued Liabilities $ 58,563 $ 52,589 Weighted average remaining lease term for operating leases (in years) 8.6 9.1 Weighted average discount rate for operating leases 3.4 % 3.7 % The following represents our future undiscounted cash flows for each of the next five years and thereafter and reconciliation to the lease liabilities, as of May 31, 2021: (In thousands) Year ending May 31, Operating Leases 2022 $ 67,058 2023 54,667 2024 42,986 2025 34,464 2026 29,655 Thereafter 142,155 Total lease payments $ 370,985 Less imputed interest 55,007 Total present value of lease liabilities $ 315,978

Pension Plans

Pension Plans	12 Months Ended
Pension Plans	May 31, 2021
Compensation And Retirement Disclosure [Abstract]
Pension Plans	NOTE N — PENSION PLANS We sponsor several pension plans for our employees, including our principal plan (the “Retirement Plan”), which is a non-contributory defined benefit pension plan covering substantially all domestic non-union employees. Pension benefits are provided for certain domestic union employees through separate plans. Employees of our foreign subsidiaries receive pension coverage, to the extent deemed appropriate, through plans that are governed by local statutory requirements. The Retirement Plan provides benefits that are based upon years of service and average compensation with accrued benefits vesting after five years. Benefits for union employees are generally based upon years of service, or a combination of years of service and average compensation. Our pension funding policy considers contributions in an amount on an annual basis that can be deducted for federal income tax purposes, using a different actuarial cost method and different assumptions from those used for financial reporting. For the fiscal year ending May 31, 2022, we are required to contribute approximately $1.0 million to the retirement plans in the United States and approximately $ 5.0 million to our foreign plans. During the year, we will evaluate whether to make additional contributions. During fiscal 202 1 , we contributed $ million to the pension plans in the U nited States which was in excess of the required contribution of $ 8,000 , but serves to improve the funded status of the p lan s . Net periodic pension cost consisted of the following for the year ended May 31: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2019 2021 2020 2019 Service cost $ 44,520 $ 39,425 $ 37,528 $ 6,355 $ 5,400 $ 4,693 Interest cost 15,223 20,415 21,987 5,308 4,842 5,420 Expected return on plan assets (33,115 ) (34,291 ) (33,867 ) (7,286 ) (7,118 ) (7,907 ) Amortization of: Prior service cost 8 9 118 (150 ) (36 ) (30 ) Net actuarial losses recognized 30,005 18,516 13,087 2,377 2,029 1,229 Curtailment/settlement losses - - - 356 86 89 Net Pension Cost $ 56,641 $ 44,074 $ 38,853 $ 6,960 $ 5,203 $ 3,494 The changes in benefit obligations and plan assets, as well as the funded status of our pension plans at May 31, 2021 and 2020, were as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Benefit obligation at beginning of year $ 762,739 $ 660,277 $ 210,278 $ 205,967 Service cost 44,520 39,425 6,355 5,400 Interest cost 15,223 20,415 5,308 4,842 Benefits paid (64,139 ) (41,186 ) (9,248 ) (6,269 ) Participant contributions - - 1,140 1,106 Plan amendments - - - (893 ) Plan combination - - - 922 Plan settlements/curtailments - - (2,342 ) (288 ) Actuarial losses/(gains) 63,730 83,808 (7,774 ) 2,718 Premiums paid - - (103 ) (99 ) Currency exchange rate changes - - 28,414 (3,128 ) Benefit Obligation at End of Year $ 822,073 $ 762,739 $ 232,028 $ 210,278 Fair value of plan assets at beginning of year $ 516,550 $ 496,865 $ 194,874 $ 187,112 Actual return on plan assets 157,702 8,689 21,350 9,899 Employer contributions 62,264 52,182 7,119 6,331 Participant contributions - - 1,140 1,106 Benefits paid (64,139 ) (41,186 ) (9,248 ) (6,269 ) Plan combination - - - 182 Premiums paid - - (103 ) (99 ) Plan settlements/curtailments - - (2,327 ) (281 ) Currency exchange rate changes - - 27,048 (3,107 ) Fair Value of Plan Assets at End of Year $ 672,377 $ 516,550 $ 239,853 $ 194,874 (Deficit)/Surplus of plan assets versus benefit obligations at end of year $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 ) Net Amount Recognized $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 ) Accumulated Benefit Obligation $ 702,315 $ 662,197 $ 217,012 $ 197,167 The fair value of the assets held by our pension plans has increased at May 31, 2021 since our previous measurement date at May 31, 2020, due to our plan contributions and market returns. Total plan liabilities have increased due to increased benefit accruals and a decrease in the discount rate used to value the liability. We have decreased our recorded liability for the net underfunded status of our pension plans. Due to the level of Plan assets and expected returns, we expect pension expense in fiscal 2022 to be lower when compared to our fiscal 2021 expense level. Any future declines in the value of our pension plan assets or increases in our plan liabilities could require us to increase our recorded liability for the net underfunded status of our pension plans and could also require accelerated and higher cash contributions to our pension plans. Amounts recognized in the Consolidated Balance Sheets for the years ended May 31, 2021 and 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Noncurrent assets $ - $ - $ 22,698 $ 13,395 Current liabilities (8 ) (8 ) (471 ) (547 ) Noncurrent liabilities (149,688 ) (246,181 ) (14,402 ) (28,252 ) Net Amount Recognized $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 ) The following table summarizes the relationship between our plans' benefit obligations and assets: U.S. Plans 2021 2020 (In thousands) Benefit Obligation Plan Assets Benefit Obligation Plan Assets Plans with projected benefit obligations in excess of plan assets $ 822,073 $ 672,377 $ 762,739 $ 516,550 Plans with accumulated benefit obligations in excess of plan assets 702,315 672,377 662,197 516,550 Plans with assets in excess of projected benefit obligations - - - - Plans with assets in excess of accumulated benefit obligations - - - - Non-U.S. Plans 2021 2020 (In thousands) Benefit Obligation Plan Assets Benefit Obligation Plan Assets Plans with projected benefit obligations in excess of plan assets $ 45,294 $ 30,421 $ 163,589 $ 134,791 Plans with accumulated benefit obligations in excess of plan assets 43,522 30,421 150,478 134,598 Plans with assets in excess of projected benefit obligations 186,734 209,432 46,689 60,083 Plans with assets in excess of accumulated benefit obligations 173,490 209,432 46,689 60,276 The following table presents the pretax net actuarial loss and prior service (costs) recognized in accumulated other comprehensive income (loss) not affecting retained earnings: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Net actuarial loss $ (250,317 ) $ (341,179 ) $ (30,045 ) $ (48,090 ) Prior service (costs) credits (12 ) (20 ) 1,023 1,098 Total recognized in accumulated other comprehensive income not affecting retained earnings $ (250,329 ) $ (341,199 ) $ (29,022 ) $ (46,992 ) The following table includes the changes recognized in other comprehensive income: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Changes in plan assets and benefit obligations recognized in other comprehensive income: Prior service cost $ - $ - $ - $ (893 ) Net loss (gain) arising during the year (60,857 ) 109,409 (21,838 ) (70 ) Effect of exchange rates on amounts included in AOCI - - 6,465 (922 ) Amounts recognized as a component of net periodic benefit cost: Amortization or curtailment recognition of prior service (cost) benefit (8 ) (9 ) 150 36 Amortization or settlement recognition of net (loss) (30,005 ) (18,516 ) (2,748 ) (2,115 ) Total recognized in other comprehensive loss (income) $ (90,870 ) $ 90,884 $ (17,971 ) $ (3,964 ) In measuring the projected benefit obligation and net periodic pension cost for our plans, we utilize actuarial valuations. These valuations include specific information pertaining to individual plan participants, such as salary, age and years of service, along with certain assumptions. The most significant assumptions applied include discount rates, expected return on plan assets and rate of compensation increases. We evaluate these assumptions, at a minimum, on an annual basis, and make required changes, as applicable. In developing our expected long-term rate of return on pension plan assets, we consider the current and expected target asset allocations of the pension portfolio, as well as historical returns and future expectations for returns on various categories of plan assets. Expected return on assets is determined by using the weighted-average return on asset classes based on expected return for the target asset allocations of the principal asset categories held by each plan. In determining expected return, we consider both historical performance and an estimate of future long-term rates of return. Actual experience is used to develop the assumption for compensation increases. The following weighted-average assumptions were used to determine our year-end benefit obligations and net periodic pension cost under the plans: U.S. Plans Non-U.S. Plans Year-End Benefit Obligations 2021 2020 2021 2020 Discount rate 2.75 % 2.77 % 2.72 % 2.49 % Rate of compensation increase 3.19 % 3.19 % 2.91 % 2.86 % U.S. Plans Non-U.S. Plans Net Periodic Pension Cost 2021 2020 2019 2021 2020 2019 Discount rate 2.78 % 3.65 % 4.12 % 2.49 % 2.61 % 3.09 % Expected return on plan assets 7.00 % 7.40 % 7.40 % 3.30 % 3.91 % 4.30 % Rate of compensation increase 3.19 % 3.80 % 3.80 % 2.86 % 2.86 % 2.85 % The following tables illustrate the weighted-average actual and target allocation of plan assets: U.S. Plans Target Allocation Actual Asset Allocation (Dollars in millions) as of May 31, 2021 2021 2020 Equity securities 55 % $ 387.1 $ 261.0 Fixed income securities 25 % 112.0 106.4 Multi-class 20 % 150.8 118.2 Cash (1) 22.3 30.8 Other 0.2 0.2 Total assets 100 % $ 672.4 $ 516.6 Non-U.S. Plans Target Allocation Actual Asset Allocation (Dollars in millions) as of May 31, 2021 2021 2020 Equity securities 37 % $ 103.4 $ 79.3 Fixed income securities 47 % 108.2 88.2 Cash 0.1 0.1 Property and other 16 % 28.2 27.3 Total assets 100 % $ 239.9 $ 194.9 (1) The larger than target cash position at May 31, 2021 results from our February 2021 contribution to the RPM International Inc. Retirement Plan because of our plans to invest the February contribution over a period of time, due to dollar cost averaging. The following tables present our pension plan assets as categorized using the fair value hierarchy at May 31, 2021 and 2020: U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 U.S. Treasury and other government $ - $ 20,752 $ - $ 20,752 State and municipal bonds - 767 - 767 Foreign bonds - 1,068 - 1,068 Mortgage-backed securities - 17,628 - 17,628 Corporate bonds - 42,370 - 42,370 Stocks - large cap 40,332 - - 40,332 Mutual funds - equity - 346,790 - 346,790 Mutual funds - multi-class - 150,838 - 150,838 Mutual funds - fixed - 29,440 - 29,440 Cash and cash equivalents 22,224 - - 22,224 Limited partnerships - - 168 168 Total $ 62,556 $ 609,653 $ 168 $ 672,377 Non-U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 Pooled equities $ - $ 101,975 $ - $ 101,975 Pooled fixed income - 107,457 - 107,457 Foreign bonds - 717 - 717 Insurance contracts - - 28,230 28,230 Mutual funds - 1,397 - 1,397 Cash and cash equivalents 77 - - 77 Total $ 77 $ 211,546 $ 28,230 $ 239,853 U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 U.S. Treasury and other government $ - $ 12,973 $ - $ 12,973 State and municipal bonds - 508 - 508 Foreign bonds - 715 - 715 Mortgage-backed securities - 23,824 - 23,824 Corporate bonds - 34,317 - 34,317 Stocks - large cap 19,589 - - 19,589 Mutual funds - equity - 241,426 - 241,426 Mutual funds - multi-class - 118,205 - 118,205 Mutual funds - fixed - 33,993 - 33,993 Cash and cash equivalents 30,830 - - 30,830 Limited partnerships - - 170 170 Total $ 50,419 $ 465,961 $ 170 $ 516,550 Non-U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 Pooled equities $ - $ 78,472 $ - $ 78,472 Pooled fixed income - 87,610 - 87,610 Foreign bonds - 603 - 603 Insurance contracts - - 27,267 27,267 Mutual funds - 855 - 855 Cash and cash equivalents 67 - - 67 Total $ 67 $ 167,540 $ 27,267 $ 194,874 The following table includes the activity that occurred during the years ended May 31, 2021 and 2020 for our Level 3 assets: Actual Return on Plan Assets For: Balance at Assets Still Held Assets Sold Purchases, Sales and Balance at (In thousands) Beginning of Period at Reporting Date During Year Settlements, net (1) End of Period Year ended May 31, 2021 $ 27,437 455 - 506 $ 28,398 Year ended May 31, 2020 28,015 (691 ) - 113 27,437 (1) Includes the impact of exchange rate changes during the year. The primary objective for the investments of the Retirement Plan is to provide for long-term growth of capital without undue exposure to risk. This objective is accomplished by utilizing a strategy of equities, fixed-income securities and cash equivalents in a mix that is conducive to participation in a rising market, while allowing for adequate protection in a falling market. Our Investment Committee oversees the investment allocation process, which includes the selection and evaluation of investment managers, the determination of investment objectives and risk guidelines, and the monitoring of actual investment performance. In order to manage investment risk properly, Plan policy prohibits short selling, securities lending, financial futures, options and other specialized investments, except for certain alternative investments specifically approved by the Investment Committee. The Investment Committee reviews, on a quarterly basis, reports of actual Plan investment performance provided by independent third parties, in addition to its review of the Plan investment policy on an annual basis. The investment objectives are similar for our plans outside of the United States, subject to local regulations. The goals of the investment strategy for pension assets include: the total return of the funds shall, over an extended period of time, surpass an index composed of the MSCI World Stock Index (equity), the Barclays Aggregate Bond Index (fixed income), and 30-day Treasury Bills (cash), weighted appropriately to match the asset allocation of the plans. The equity portion of the funds shall surpass the MSCI World Stock Index over a full market cycle, while the fixed-income portion shall surpass Barclays Aggregate Bond Index over a full market cycle. The purpose of the core fixed-income fund is to increase return in the form of cash flow, provide a hedge against inflation and to reduce the volatility of the fund overall. Therefore, the primary objective of the core fixed-income portion is to match the Barclays Aggregate Bond Index. The purpose of including opportunistic fixed-income assets such as, but not limited to, global and high-yield securities in the portfolio is to enhance the overall risk-return characteristics of the Fund. We expect to pay the following estimated pension benefit payments in the next five years (in millions): $71.6 in 2022, $71.2 in 2023, $75.1 in 2024, $75.9 in 2025 and $77.1 in 2026. In the five years thereafter (2027-2031), we expect to pay $375.8 million. In addition to the defined benefit pension plans discussed above, we also sponsor employee savings plans under Section 401(k) of the Internal Revenue Code, which cover most of our employees in the United States. We record expense for defined contribution plans for any employer-matching contributions made in conjunction with services rendered by employees. The majority of our plans provide for matching contributions made in conjunction with services rendered by employees. Matching contributions are invested in the same manner that the participants invest their own contributions. Matching contributions charged to income were $21.7 million, $21.1 million and $19.4 million for the years ending May 31, 2021, 2020 and 2019, respectively.

Postretirement Benefits

Postretirement Benefits	12 Months Ended
Postretirement Benefits	May 31, 2021
Postemployment Benefits [Abstract]
Postretirement Benefits	NOTE O — POSTRETIREMENT BENEFITS We sponsor several unfunded-healthcare-benefit plans for certain of our retired employees, as well as postretirement life insurance for certain key former employees. Eligibility for these benefits is based upon various requirements. The following table illustrates the effect on operations of these plans for the three years ended May 31, 2021: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2019 2021 2020 2019 Service cost - benefits earned during the period $ - $ - $ - $ 1,959 $ 1,661 $ 1,507 Interest cost on the accumulated obligation 74 149 192 1,286 1,089 1,122 Amortization of: Prior service (credit) (167 ) (219 ) (219 ) - - - Net actuarial (gains) losses 42 (66 ) (26 ) 590 611 442 Net Postretirement Benefit (Income) Cost $ (51 ) $ (136 ) $ (53 ) $ 3,835 $ 3,361 $ 3,071 The changes in benefit obligations of the plans at May 31, 2021 and 2020 were as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Accumulated postretirement benefit obligation at beginning of year $ 4,182 $ 4,990 $ 38,389 $ 37,663 Service cost - - 1,959 1,661 Interest cost 74 149 1,286 1,089 Benefit payments (1,902 ) (1,659 ) (673 ) (639 ) Actuarial (gains) losses 152 702 (6,415 ) (683 ) Currency exchange rate changes - - 5,428 (702 ) Accumulated and accrued postretirement benefit obligation at end of year $ 2,506 $ 4,182 $ 39,974 $ 38,389 In determining the postretirement benefit amounts outlined above, measurement dates as of May 31 for each period were applied. Amounts recognized in the Consolidated Balance Sheets for the years ended May 31, 2021 and 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Current liabilities $ (238 ) $ (385 ) $ (931 ) $ (805 ) Noncurrent liabilities (2,268 ) (3,797 ) (39,043 ) (37,584 ) Net Amount Recognized $ (2,506 ) $ (4,182 ) $ (39,974 ) $ (38,389 ) The following table presents the pretax net actuarial (loss) and prior service credits recognized in accumulated other comprehensive income (loss) not affecting retained earnings: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Net actuarial (loss) $ (497 ) $ (386 ) $ (5,901 ) $ (11,331 ) Prior service credits 281 448 - - Total recognized in accumulated other comprehensive income not affecting retained earnings $ (216 ) $ 62 $ (5,901 ) $ (11,331 ) The following table includes the changes recognized in other comprehensive income: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Changes in plan assets and benefit obligations recognized in other comprehensive income: Prior service cost $ - $ - $ - $ - Net loss (gain) arising during the year 152 702 (6,415 ) (683 ) Effect of exchange rates on amounts included in AOCI - - 1,574 (266 ) Amounts recognized as a component of net periodic benefit cost: Amortization or curtailment recognition of prior service credit 167 219 - - Amortization or settlement recognition of net gain (loss) (41 ) 66 (590 ) (611 ) Total recognized in other comprehensive loss (income) $ 278 $ 987 $ (5,431 ) $ (1,560 ) The following weighted-average assumptions were used to determine our year-end benefit obligations and net periodic postretirement benefit costs under the plans: U.S. Plans Non-U.S. Plans Year-End Benefit Obligations 2021 2020 2021 2020 Discount rate 2.47 % 2.44 % 3.51 % 3.32 % Current healthcare cost trend rate 6.07 % 6.68 % 5.68 % 5.73 % Ultimate healthcare cost trend rate 4.36 % 4.36 % 3.70 % 3.70 % Year ultimate healthcare cost trend rate will be realized 2037 2037 2040 2040 U.S. Plans Non-U.S. Plans Net Periodic Postretirement Cost 2021 2020 2019 2021 2020 2019 Discount rate 2.44 % 3.44 % 4.03 % 3.32 % 3.22 % 3.70 % Healthcare cost trend rate 6.68 % 7.29 % 7.86 % 5.73 % 5.77 % 6.02 % Ultimate healthcare cost trend rate 4.36 % 4.36 % 4.36 % 3.70 % 3.70 % 4.20 % Year ultimate healthcare cost trend rate will be realized 2037 2037 2037 2040 2040 2032 We expect to pay approximately $1.2 million to $1.5 million in estimated postretirement benefits in each of the next five years. In the five years thereafter (2027-2031), we expect to pay a cumulative total of $9.3 million.

Contingencies and Accrued Losse

Contingencies and Accrued Losses	12 Months Ended
Contingencies and Accrued Losses	May 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Contingencies and Accrued Losses	NOTE P — CONTINGENCIES AND ACCRUED LOSSES Accrued loss reserves consist of the following: May 31, 2021 2020 (In thousands) Accrued product liability reserves $ 18,296 $ 10,458 Accrued warranty reserves 9,429 7,593 Accrued environmental reserves 1,329 1,970 Total Accrued Loss Reserves - Current $ 29,054 $ 20,021 Accrued product liability reserves - noncurrent $ 26,614 $ 27,016 Accrued warranty liability - noncurrent 3,746 3,513 Accrued environmental reserves - noncurrent 6,267 4,125 Total Accrued Loss Reserves - Noncurrent $ 36,627 $ 34,654 Product Liability Matters 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. Warranty Matters 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 May 31, 2021, 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 component of cost of sales or within SG&A. 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: Year Ended May 31, 2021 2020 2019 (In thousands) Beginning Balance $ 11,106 $ 10,414 $ 11,721 Deductions (1) (25,817 ) (20,762 ) (22,262 ) Provision charged to expense 27,886 21,454 20,955 Ending Balance $ 13,175 $ 11,106 $ 10,414 (1) Primarily claims paid during the year. Environmental Matters Like other companies participating in similar lines of business, some of our subsidiaries are involved in environmental remediation matters. It is our policy to accrue remediation costs when the liability is probable and the costs are reasonably estimable, which generally is not later than at completion of a feasibility study or when we have committed to an appropriate plan of action. We also take into consideration the estimated period of time over which payments may be required. The liabilities are reviewed periodically and, as investigation and remediation activities continue, adjustments are made as necessary. Liabilities for losses from environmental remediation obligations do not consider the effects of inflation and anticipated expenditures are not discounted to their present value. The liabilities are not offset by possible recoveries from insurance carriers or other third parties, but do reflect anticipated allocations among potentially responsible parties at federal superfund sites or similar state-managed sites, third party indemnity obligations, and an assessment of the likelihood that such parties will fulfill their obligations at such sites. Other Contingencies We were notified by the SEC on June 24, 2014, that we were 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. The restatement shifted accrual amounts among the three quarters, which had the effect of reducing net income by $7.2 million and $10.8 million for the quarterly periods ended August 31, 2012, and November 30, 2012, respectively, and increasing net income for the quarterly period ended February 28, 2013 by $18.0 million. These restatements had no impact on our audited financial statements for the fiscal years ended May 31, 2013 or 2014. In connection with the foregoing, on September 9, 2016, the SEC filed an enforcement action against us and our General Counsel. The complaint sought disgorgement of gains that may have resulted from the conduct alleged in the complaint, and payment of unspecified monetary penalties from us and our General Counsel pursuant to Section 20(d) of the Securities Act and Section 21(d)(3) of the Exchange Act. Further, the complaint sought to permanently enjoin us from violations of Sections 17(a)(2) and (a)(3) of the Securities Act, Sections 13(a), 13(b)(2)(A) and 13(b)(2)(B) of the Exchange Act, and Exchange Act Rules 12b-20, 13a-1, 13a-11 and 13a-13, and to permanently enjoin our General Counsel from violations of Sections 17(a)(2) and (a)(3) of the Securities Act and Exchange Act Rules 13b2-1 and 13b2-2(a). On December 22, 2020, the Court entered its Final Judgment (the “Final Judgment”) resolving this matter with the SEC. In consenting to the terms of the Final Judgment, we and our General Counsel neither admitted nor denied the SEC’s allegations. We agreed to pay a civil monetary penalty of $2.0 million under Section 21(d)(3) of the Exchange Act, and we are permanently enjoined from violations of Section 13(a), 13(b)(2)(a) and 13(b)(2)(b) of the Exchange Act and Exchange Act Rules 12b-20, 13a-1, 13a-11 and 13a-13. The settlement amount was accrued for in our consolidated financial statements as of November 30, 2020. Our General Counsel agreed to pay a civil monetary penalty of $22,500 under Section 21(d)(3) of the Exchange Act, and he is permanently enjoined from violations of Exchange Act Rule 13b2-1. Both the Company and our General Counsel have paid their respective civil monetary penalties during the fiscal quarter ended February 28, 2021. For both the Company and our General Counsel, the Final Judgment resolved all claims asserted by the SEC in the proceeding and included relief only with respect to certain books and records provisions of the securities laws, none of which require proof of intentional or willful misconduct. Also, in connection with the foregoing, on April 28, 2017, a stockholder derivative action was filed in the United States District Court, Northern District of Ohio, Eastern Division, against certain of our current and former directors and officers. On February 2, 2018, the Court granted our request for a stay and stayed the derivative action pending the completion of the SEC enforcement action. The stay may be revisited by the Court now that the SEC enforcement action has been resolved. We do not believe a material loss in this matter is reasonably possible or probable.

Revenue

Revenue	12 Months Ended
Revenue	May 31, 2021
Revenue From Contract With Customer [Abstract]
Revenue	NOTE Q — REVENUE We operate a portfolio of businesses and product lines that manufacture and sell a variety of specialty paints, protective coatings, roofing systems, sealants and adhesives. We disaggregate revenues from the sales of our products and services based upon geographical location by each of our reportable segments, which are aligned by similar economic factors, trends and customers, which best depict the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. See Note R, “Segment Information,” to the Consolidated Financial Statements for further details regarding our disaggregated revenues, as well as a description of each of the unique revenue streams related to each of our four reportable segments. Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. The majority of our revenue is recognized at a point in time. However, we also record revenues generated under construction contracts, mainly in connection with the installation of specialized roofing and flooring systems and related services. For certain polymer flooring installation projects, we account for our revenue using the output method, as we consider square footage of completed flooring to be the best measure of progress toward the complete satisfaction of the performance obligation. In contrast, for certain of our roofing installation projects, we account for our revenue using the input method, as that method was the best measure of performance as it considers costs incurred in relation to total expected project costs, which essentially represents the transfer of control for roofing systems to the customer. In general, for our construction contracts, we record contract revenues and related costs as our contracts progress on an over-time model. We have elected to apply the practical expedient to recognize revenue net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Payment terms and conditions vary by contract type, although our customers’ payment terms generally include a requirement to pay within 30 to 60 days of fulfilling our performance obligations. In instances where the timing of revenue recognition differs from the timing of invoicing, we have determined that our contracts generally do not include a significant financing component. We have elected to apply the practical expedient to treat all shipping and handling costs as fulfillment costs, as a significant portion of these costs are incurred prior to control transfer. Significant Judgments Our contracts with customers may include promises to transfer multiple products and/or services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. For example, judgment is required to determine whether products sold in connection with the sale of installation services are considered distinct and accounted for separately, or not distinct and accounted for together with installation services and recognized over time. We provide customer rebate programs and incentive offerings, including special pricing and co-operative advertising arrangements, promotions and other volume-based incentives. These customer programs and incentives are considered variable consideration and recognized as a reduction of net sales. Up-front consideration provided to customers is capitalized as a component of other assets and amortized over the estimated life of the contractual arrangement. We include in revenue variable consideration only to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the variable consideration is resolved. In general, this determination is made based upon known customer program and incentive offerings at the time of sale, and expected sales volume forecasts as it relates to our volume-based incentives. This determination is updated each reporting period. Certain of our contracts include contingent consideration that is receivable only upon the final inspection and acceptance of a project. We include estimates of such variable consideration in our transaction price. Based on historical experience, we consider the probability-based expected value method appropriate to estimate the amount of such variable consideration. Our products are generally sold with a right of return and we may provide other credits or incentives, which are accounted for as variable consideration when estimating the amount of revenue to recognize. Returns and credits are estimated at contract inception and updated at the end of each reporting period as additional information becomes available. We record a right of return liability to accrue for expected customer returns. Historical actual returns are used to estimate future returns as a percentage of current sales. Obligations for returns and refunds were not material individually or in the aggregate. We offer assurance type warranties on our products as well as separately sold warranty contracts. Revenue related to warranty contracts that are sold separately is recognized over the life of the warranty term. Warranty liabilities for our assurance type warranties are discussed further in Note P, “Contingencies and Accrued Losses,” to the Consolidated Financial Statements. Contract Balances Timing of revenue recognition may differ from the timing of invoicing customers. Our contract assets are recorded for products and services that have been provided to our customer but have not yet been billed, and are included in prepaid expenses and other current assets in our consolidated balance sheets. Our short-term contract liabilities consist of advance payments, or deferred revenue, and are included in other accrued liabilities in our consolidated balance sheets. Trade accounts receivable, net of allowances, and net contract assets (liabilities) consisted of the following: Year Ended May 31, 2021 2020 $ Change % Change (In thousands, except percents) Trade accounts receivable, less allowance $ 1,280,806 $ 1,137,957 $ 142,849 12.6 % Contract assets $ 33,217 $ 25,249 $ 7,968 31.6 % Contract liabilities - short-term (33,112 ) (25,288 ) (7,824 ) 30.9 % Net Contract Assets/(Liabilities) $ 105 $ (39 ) $ 144 -369.2 % The relatively small $0.1 million change in our net contract assets/(liabilities) from May 31, 2020 to May 31, 2021, resulted primarily from the timing and volume of construction jobs in progress at May 31, 2021 versus May 31, 2020. During the fourth quarter of fiscal 2021, net sales at our general contracting and roofing services business increased slightly by $0.2 million as compared to the fourth quarter of fiscal 2020. Despite the Covid pandemic, sales in both periods were strong as many of our customers chose to utilize this time, as fewer people were inside their facilities, to tackle projects that they had previously been putting off. Furthermore, roofing projects are completed outdoors, and contractors do not require entry into customers’ facilities. We also record long-term deferred revenue, which amounted to $67.8 million and $66.0 million as of May 31, 2021 and 2020, respectively. The long-term portion of deferred revenue is related to assurance type warranty contracts and is included in other long-term liabilities in our consolidated balance sheets. We have elected to adopt the practical expedient to not disclose the aggregate amount of transaction price allocated to performance obligations that are unsatisfied as of the end of the reporting period for performance obligations that are part of a contract with an original expected duration of one year or less. We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. As our contract terms are primarily one year or less in duration, we have elected to apply a practical expedient to expense costs as incurred for costs to obtain a contract with a customer when the amortization period would have been one year or less. These costs include our internal sales force compensation program and certain incentive programs as we have determined annual compensation is commensurate with annual sales activities. Allowance for Credit Losses Our primary allowance for credit losses is the allowance for doubtful accounts. The allowance for doubtful accounts reduces the trade accounts receivable balance to the estimated net realizable value equal to the amount that is expected to be collected. The allowance was based on assessments of current creditworthiness of customers, historical collection experience, the aging of receivables and other currently available evidence. Trade accounts receivable balances are written-off against the allowance if a final determination of uncollectibility is made. All provisions for allowances for doubtful collection of accounts are included in selling, general and administrative expenses. The following tables summarize the activity for the allowance for credit losses for the fiscal year ended May 31, 2021: (In thousands) Balance at June 1, 2020 $ 55,847 Bad debt provision 10,044 Uncollectible accounts written off, net of recoveries (14,182 ) Translation adjustments 4,213 Balance at May 31, 2021 $ 55,922

Segment Information

Segment Information	12 Months Ended
Segment Information	May 31, 2021
Segment Reporting [Abstract]
Segment Information	NOTE R — SEGMENT INFORMATION We operate a portfolio of businesses and product lines that manufacture and sell a variety of specialty paints, protective coatings, roofing systems, flooring solutions, sealants, cleaners and adhesives. We manage our portfolio by organizing our businesses and product lines into four reportable segments as outlined below, which also represent our operating segments. Within each operating segment, we manage product lines and businesses which generally address common markets, share similar economic characteristics, utilize similar technologies and can share manufacturing or distribution capabilities. Our four 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 four 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. We evaluate the profit performance of our segments primarily based on income before income taxes, but also look to earnings (loss) before interest and taxes (“EBIT”), and/or adjusted EBIT, as a performance evaluation measure because interest expense is essentially related to acquisitions, as opposed to segment operations. Our CPG reportable segment products are sold throughout North America and also account for the majority of our international sales. Our construction product lines are sold directly to contractors, distributors and end-users, such as industrial manufacturing facilities, public institutions and other commercial customers. Products and services within this reportable segment include construction sealants and adhesives, coatings and chemicals, roofing systems, concrete admixture and repair products, building envelope solutions, insulated cladding, flooring systems, and weatherproofing solutions. Our PCG reportable segment products are sold throughout North America, as well as internationally, and are sold directly to contractors, distributors and end-users, such as industrial manufacturing facilities, public institutions and other commercial customers. Products and services within this reportable segment include high-performance flooring solutions, corrosion control and fireproofing coatings, infrastructure repair systems, fiberglass reinforced plastic gratings and drainage systems. 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 reportable 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 and through distributors. The Consumer reportable segment offers products that include specialty, hobby and professional paints; caulks; adhesives; cleaners; sandpaper and other abrasives; silicone sealants and wood stains. Sales to The Home Depot, Inc. represented less than 10% of our consolidated net sales for fiscal 2021, 2020 and 2019, respectively. Furthermore, sales to The Home Depot, Inc. represented %, 26% and 29% of our Consumer segment net sales for each of the fiscal years ended May 31, 2021, 2020 and 2019, respectively. Our SPG reportable segment products are sold throughout North America and a few international locations, primarily in Europe. Our SPG product lines are sold directly to contractors, distributors and end-users, such as industrial manufacturing facilities, public institutions and other commercial customers. The SPG reportable segment offers products that include industrial cleaners, restoration services equipment, colorants, nail enamels, exterior finishes, edible coatings and specialty glazes for pharmaceutical and food industries, and other specialty original equipment manufacturer (“OEM”) coatings. In addition to our four 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. Year Ended May 31, 2021 2020 2019 (In thousands) Net Sales CPG $ 2,076,565 $ 1,880,105 $ 1,899,744 PCG 1,028,456 1,080,701 1,136,119 Consumer 2,295,277 1,945,220 1,858,453 SPG 705,990 600,968 670,235 Total $ 6,106,288 $ 5,506,994 $ 5,564,551 Income (Loss) Before Income Taxes CPG $ 291,773 $ 209,663 $ 178,823 PCG 90,687 102,345 77,388 Consumer 354,789 198,024 217,448 SPG 108,242 57,933 86,018 Corporate/Other (177,053 ) (160,201 ) (219,832 ) Total $ 668,438 $ 407,764 $ 339,845 Identifiable Assets CPG $ 1,815,303 $ 1,622,632 $ 1,573,329 PCG 1,051,334 925,569 951,644 Consumer 2,386,703 2,067,017 1,953,279 SPG 772,540 728,449 689,133 Corporate/Other 227,089 287,287 273,970 Total $ 6,252,969 $ 5,630,954 $ 5,441,355 Capital Expenditures CPG $ 65,830 $ 63,393 $ 40,119 PCG 19,413 23,868 22,158 Consumer 54,986 47,331 45,039 SPG 18,989 21,610 28,006 Corporate/Other 223 1,077 1,435 Total $ 159,441 $ 157,279 $ 136,757 Depreciation and Amortization CPG $ 45,079 $ 46,491 $ 44,150 PCG 22,633 23,850 27,116 Consumer 47,763 56,570 40,231 SPG 26,017 24,111 25,199 Corporate/Other 5,365 5,820 5,046 Total $ 146,857 $ 156,842 $ 141,742 Year Ended May 31, 2021 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,135,341 $ 611,808 $ 1,832,826 $ 581,094 $ 4,161,069 Foreign Canada 208,289 69,754 153,631 8,982 440,656 Europe 481,244 242,102 257,372 82,170 1,062,888 Latin America 159,197 26,283 31,358 1,826 218,664 Asia Pacific 79,413 22,658 20,090 31,918 154,079 Other Foreign 13,081 55,851 - - 68,932 Total Foreign 941,224 416,648 462,451 124,896 1,945,219 Total $ 2,076,565 $ 1,028,456 $ 2,295,277 $ 705,990 $ 6,106,288 Year Ended May 31, 2020 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,068,552 $ 656,162 $ 1,573,966 $ 489,543 $ 3,788,223 Foreign Canada 159,986 71,689 116,424 8,354 356,453 Europe 418,249 247,904 195,783 74,162 936,098 Latin America 151,099 32,471 24,909 1,328 209,807 Asia Pacific 73,629 24,622 26,432 27,581 152,264 Other Foreign 8,590 47,853 7,706 - 64,149 Total Foreign 811,553 424,539 371,254 111,425 1,718,771 Total $ 1,880,105 $ 1,080,701 $ 1,945,220 $ 600,968 $ 5,506,994 Year Ended May 31, 2019 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,003,227 $ 667,402 $ 1,462,446 $ 543,429 $ 3,676,504 Foreign Canada 181,089 82,897 117,305 8,908 390,199 Europe 477,761 251,600 213,466 86,197 1,029,024 Latin America 155,039 34,588 28,020 1,397 219,044 Asia Pacific 81,895 36,498 29,171 30,304 177,868 Other Foreign 733 63,134 8,045 - 71,912 Total Foreign 896,517 468,717 396,007 126,806 1,888,047 Total $ 1,899,744 $ 1,136,119 $ 1,858,453 $ 670,235 $ 5,564,551 Year Ended May 31, 2021 2020 2019 (In thousands) Long-Lived Assets (b) United States $ 2,325,365 $ 2,146,333 $ 1,859,628 Foreign Canada 235,810 224,177 242,582 Europe 394,168 358,511 343,501 United Kingdom 290,078 252,185 217,414 Other Foreign 198,740 195,425 225,230 Total Foreign 1,118,796 1,030,298 1,028,727 Total $ 3,444,161 $ 3,176,631 $ 2,888,355 (a) It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines. (b) Long-lived assets include all non-current assets, excluding non-current deferred income taxes.

Valuation And Qualifying Accoun

Valuation And Qualifying Accounts and Reserves (Schedule II)	12 Months Ended
	May 31, 2021
Valuation And Qualifying Accounts [Abstract]
Valuation and Qualifying Accounts and Reserves (Schedule II)	RPM International Inc. and Subsidiaries Valuation And Qualifying Accounts and Reserves (Schedule II) Additions Acquisitions Charged to (Disposals) Balance at Selling, of Businesses Balance at Beginning General and and (Deductions) End (In thousands) of Period Administrative Reclassifications Additions of Period Year Ended May 31, 2021 Current: Accrued product liability reserves $ 10,458 $ 14,173 $ — $ (6,334 ) (2) $ 18,297 Accrued environmental reserves $ 1,970 $ 1,045 $ — $ (1,686 ) (2) $ 1,329 Noncurrent: Accrued product liability reserves $ 27,016 $ 15,366 $ — (15,768 ) (2) $ 26,614 Accrued environmental reserves $ 4,125 $ 1,918 $ — $ 224 $ 6,267 Year Ended May 31, 2020 Current: Allowance for credit losses (3) $ 54,748 $ 16,683 $ (79 ) $ (15,505 ) (1) $ 55,847 Accrued product liability reserves $ 11,739 $ 5,356 $ — $ (6,637 ) (2) $ 10,458 Accrued environmental reserves $ 1,147 $ 1,168 $ — $ (345 ) (2) $ 1,970 Noncurrent: Accrued product liability reserves $ 29,942 $ 15,042 $ — (17,968 ) (2) $ 27,016 Accrued environmental reserves $ 4,211 $ 371 $ — $ (457 ) $ 4,125 Year Ended May 31, 2019 Current: Allowance for credit losses (3) $ 46,344 $ 18,646 $ (131 ) $ (10,111 ) (1) $ 54,748 Accrued product liability reserves $ 12,900 $ 12,696 $ — $ (13,857 ) (2) $ 11,739 Accrued environmental reserves $ 1,144 $ 875 $ — $ (872 ) (2) $ 1,147 Noncurrent: Accrued product liability reserves $ 29,902 $ 8,301 $ — (8,261 ) (2) $ 29,942 Accrued environmental reserves $ 3,571 $ 895 $ — $ (255 ) $ 4,211 (1) Uncollectible accounts written off, net of recoveries (2) Primarily claims paid during the year, net of insurance contributions (3) Beginning in fiscal 2021, we began presenting a rollforward of our Allowance for Credit Losses in Note Q, "Revenue." See Note Q, “Revenue,” to the Consolidated Financial Statements for further details on fiscal 2021 activity.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	May 31, 2021
Accounting Policies [Abstract]
Consolidation, Noncontrolling Interests and Basis of Presentation	1) Consolidation, Noncontrolling Interests and Basis of Presentation 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).
Use of Estimates	2) Use of Estimates The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Acquisitions/Divestitures	3) Acquisitions/Divestitures We account for business combinations and asset acquisitions using the acquisition method of accounting and, accordingly, the assets and liabilities of the acquired entities are recorded at their estimated fair values at the acquisition date. During the fiscal year ended May 31, 2021, we completed a total of four acquisitions in each of our four reportable segments. Within our Consumer reportable segment, we acquired a manufacturer of sandpaper and other abrasives headquartered in Fairborn, Ohio. Within our PCG reportable segment, we acquired a manufacturer of raised flooring systems headquartered in Denver, Colorado. We also completed immaterial acquisitions within our SPG and CPG reportable segments. During the fiscal year ended May 31, 2020, we completed a total of three acquisitions among three of our four reportable segments. Within our CPG reportable segment, we acquired a manufacturer and marketer of joint sealants for commercial construction headquartered in Hudson, New Hampshire. Within our PCG reportable segment, we acquired a manufacturer of trenchless pipe rehabilitation equipment headquartered in Quebec, Canada. Lastly, within our SPG reportable segment, we acquired a manufacturer of dry stabilizer and emulsifier blends for the food industry headquartered in Elgin, Illinois. The purchase price for each acquisition has been allocated to the estimated fair values of the assets acquired and liabilities assumed as of the date of acquisition. We have finalized the purchase price allocation for our fiscal 2020 acquisitions. For acquisitions completed during fiscal 2021, the valuations of consideration transferred, total assets acquired and liabilities assumed are substantially complete. The primary areas that remain preliminary relate to working capital adjustments. Acquisitions are aggregated by year of purchase in the following table: Fiscal 2021 Acquisitions Fiscal 2020 Acquisitions (In thousands) Weighted-Average Intangible Asset Amortization Life (In Years) Total Weighted-Average Intangible Asset Amortization Life (In Years) Total Current assets $ 50,310 $ 10,649 Property, plant and equipment 27,012 1,694 Goodwill N/A 41,654 N/A 28,291 Trade names - indefinite lives N/A 16,694 N/A 1,555 Other intangible assets 20 53,894 16 31,046 Other long-term assets 6,831 56 Total Assets Acquired $ 196,395 $ 73,291 Liabilities assumed (24,232 ) (7,135 ) Net Assets Acquired $ 172,163 (1) $ 66,156 (2) (1) Figure includes cash acquired of $6.4 million. (2) Figure includes cash acquired of $1.6 million. Our Consolidated Financial Statements reflect the results of operations of acquired businesses as of their respective dates of acquisition. Pro-forma results of operations for the years ended May 31, 2021 and 2020 were not materially different from reported results and, consequently, are not presented.
Foreign Currency	4) Foreign Currency The functional currency for each of our foreign subsidiaries is its principal operating currency. Accordingly, for the periods presented, assets and liabilities have been translated using exchange rates at year end, while income and expense for the periods have been translated using a weighted-average exchange rate. The resulting translation adjustments have been recorded in accumulated other comprehensive income (loss), a component of stockholders’ equity, and will be included in net earnings only upon the sale or liquidation of the underlying foreign investment, neither of which is contemplated at this time. Transaction gains and losses have moderated during the last three fiscal years based on more modest fluctuations in the strength of the U.S. dollar, resulting in net transactional foreign exchange losses in fiscal 2021 and 2019 of approximately $2.8 million and $4.8 million, respectively, and net transactional foreign exchange gains for fiscal 2020 of approximately $0.3 million.
Cash and Cash Equivalents	5) Cash and Cash Equivalents We consider all highly liquid debt instruments purchased with a maturity of three months or less to be cash equivalents. We do not believe we are exposed to any significant credit risk on cash and cash equivalents. The carrying amounts of cash and cash equivalents approximate fair value.
Property, Plant & Equipment	6) Property, Plant & Equipment May 31, 2021 2020 (In thousands) Land $ 93,455 $ 85,860 Buildings and leasehold improvements 518,205 469,483 Machinery and equipment 1,355,822 1,199,847 Total property, plant and equipment, at cost 1,967,482 1,755,190 Less: allowance for depreciation and amortization 1,002,300 905,504 Property, plant and equipment, net $ 965,182 $ 849,686 We review long-lived assets for impairment when circumstances indicate that the carrying values of these assets may not be recoverable. For assets that are to be held and used, an impairment charge is recognized when the estimated undiscounted future cash flows associated with the asset or group of assets are less than their carrying value. If impairment exists, an adjustment is made to write the asset down to its fair value, and a loss is recorded for the difference between the carrying value and the fair value. Fair values are determined based on quoted market values, discounted cash flows, internal appraisals or external appraisals, as applicable. Assets to be disposed of are carried at the lower of their carrying value or estimated net realizable value. Depreciation is computed primarily using the straight-line method over the following ranges of useful lives: Buildings and leasehold improvements 1 to 50 years Machinery and equipment 1 to 40 years Total depreciation expense for each fiscal period includes the charges to income that result from the amortization of assets recorded under finance leases. For the periods ended May 31, 2021, 2020 and 2019, we recorded depreciation expense of $99.4 million, $108.5 million, and $94.0 million, respectively.
Revenue Recognition	7) Revenue Recognition Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. The majority of our revenue is recognized at a point in time. However, we also record revenues generated under construction contracts, mainly in connection with the installation of specialized roofing and flooring systems and related services. For certain polymer flooring installation projects, we account for our revenue using the output method, as we consider square footage of completed flooring to be the best measure of progress toward the complete satisfaction of the performance obligation. In contrast, for certain of our roofing installation projects, we account for our revenue using the input method, as that method was the best measure of performance as it considers costs incurred in relation to total expected project costs, which essentially represents the transfer of control for roofing systems to the customer. In general, for our other construction contracts, we record contract revenues and related costs as our contracts progress on an over-time model. Effective June 1, 2018, we adopted Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers,” and all the related amendments included within Accounting Standards Codification 606 (“ASC 606”).
Shipping Costs	8) Shipping Costs We identify shipping and handling costs as costs paid to third-party shippers for transporting products to customers, and we include these costs in cost of sales in our Consolidated Statements of Income.
Allowance for Credit Losses	9) Allowance for Credit Losses Our primary allowance for credit losses is the allowance for doubtful accounts. The allowance for doubtful accounts reduces the trade accounts receivable balance to the estimated net realizable value equal to the amount that is expected to be collected. The allowance is established using assessments of current creditworthiness of customers, historical collection experience, the aging of receivables and other currently available evidence. Trade accounts receivable balances are written-off against the allowance if a final determination of uncollectibility is made. All provisions for allowances for doubtful collection of accounts are included in selling, general and administrative expenses. Actual collections of trade receivables could differ from our estimates due to changes in future economic or industry conditions or specific customer’s financial conditions. For the periods ended May 31, 2021, 2020 and 2019, bad debt expense approximated $10.0 million, $16.7 million and $18.6 million, respectively. Bad debt expense was elevated in fiscal 2020 and fiscal 2019 due to additional write-offs associated with exiting unprofitable product lines and regions in conjunction with our MAP to Growth. Fiscal 2020 bad debt expense also reflects, although to a much lesser degree, due to the impact Covid had on some of our customers’ ability to pay timely. Refer to Note B, “Restructuring,” for further information.
Inventories	10) Inventories Inventories are stated at the lower of cost or net realizable value, cost being determined on a first-in, first-out (FIFO) basis and net realizable value being determined on the basis of replacement cost. Inventory costs include raw materials, labor and manufacturing overhead. We review the net realizable value of our inventory in detail on an on-going basis, with consideration given to various factors, which include our estimated reserves for excess, obsolete, slow-moving or distressed inventories. If actual market conditions differ from our projections, and our estimates prove to be inaccurate, write-downs of inventory values and adjustments to cost of sales may be required. Historically, our inventory reserves have approximated actual experience. For the periods ended May 31, 2021, 2020 and 2019, charges related to slow moving and/or obsolete inventory on hand approximated $3.7 million, $39.6 million and $29.4 million, respectively. Charges recorded during fiscal 2021 were more normalized in comparison to fiscal 2020 and fiscal 2019, which both had elevated inventory charges associated with our MAP to Growth restructuring activities. During fiscal 2020, we recorded $28.8 million within our Consumer reportable segment consisting of proactive management of excess quantities of inventory in order to accelerate cash conversion, SKU rationalization, and exiting unprofitable product lines and regions and $3.2 million within our PCG segment related to exiting unprofitable product lines and regions. During fiscal 2019, we recorded $10.5 million in charges resulting from more proactive management of inventory at our Consumer segment, and $9.0 million and $1.0 million of inventory charges related to restructuring activities at our PCG and CPG segments, respectively. Inventories were composed of the following major classes: May 31, 2021 2020 (In thousands) Raw materials and supplies $ 447,220 $ 282,579 Finished goods 490,875 527,869 Total Inventory $ 938,095 $ 810,448
Goodwill and Other Intangible Assets	11) Goodwill and Other Intangible Assets We account for goodwill and other intangible assets in accordance with the provisions of ASC 350 and account for business combinations using the acquisition method of accounting and, accordingly, the assets and liabilities of the entities acquired are recorded at their estimated fair values at the acquisition date. Goodwill Goodwill represents the excess of the purchase price paid over the fair value of net assets acquired, including the amount assigned to identifiable intangible assets. Goodwill is assigned to reporting units that are expected to benefit from the synergies of the business combination as of the acquisition date. Once goodwill has been allocated to the reporting units, it no longer retains its identification with a particular acquisition and becomes identified with the reporting unit in its entirety. Accordingly, the fair value of the reporting unit as a whole is available to support the recoverability of its goodwill. We evaluate our reporting units when changes in our operating structure occur, and if necessary, reassign goodwill using a relative fair value allocation approach. We test our goodwill balances at least annually, or more frequently as impairment indicators arise, at the reporting unit level. Our annual impairment assessment date has been designated as the first day of our fourth fiscal quarter. Our reporting units have been identified at the component level, which is one level below our operating segments. We follow the Financial Accounting Standards Board (“FASB”) guidance found in Accounting Standards Codification (“ASC”) 350 that simplifies how an entity tests goodwill for impairment. It provides an option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, and whether it is necessary to perform a quantitative goodwill impairment test. We assess qualitative factors in each of our reporting units that carry goodwill. We assess these qualitative factors to determine whether it is necessary to perform the quantitative goodwill impairment test. The quantitative process is required only if we conclude that it is more likely than not that a reporting unit’s fair value is less than its carrying amount. However, we have an unconditional option to bypass a qualitative assessment and proceed directly to performing the quantitative analysis. In applying the quantitative test, we compare the fair value of a reporting unit to its carrying value. If the calculated fair value is less than the current carrying value, then impairment of the reporting unit exists. In applying the market approach, we use market multiples derived from a set of similar companies. In applying the income approach, we evaluate discounted future cash flows determined from estimated cashflow adjustments to a reporting unit’s projected EBITDA. Under this approach, we calculate the fair value of a reporting unit based on the present value of estimated future cash flows. In applying the discounted cash flow methodology utilized in the income approach, we rely on a number of factors, including future business plans, actual and forecasted operating results, and market data. The significant assumptions employed under this method include discount rates; revenue growth rates, including assumed terminal growth rates; and operating margins used to project future cash flows for a reporting unit. The discount rates utilized reflect market-based estimates of capital costs and discount rates adjusted for management’s assessment of a market participant’s view with respect to other risks associated with the projected cash flows of the individual reporting unit. Our estimates are based upon assumptions we believe to be reasonable, but which by nature are uncertain and unpredictable. We believe we incorporate ample sensitivity ranges into our analysis of goodwill impairment testing for a reporting unit, such that actual experience would need to be materially out of the range of expected assumptions in order for an impairment to remain undetected. Changes in the Composition of Reporting Units in Fiscal 2020 On June 1, 2019, the composition of our reportable segments was revised, as further discussed in Note R, “Segment Information.” Prior to implementing the revised segment reporting structure beginning in fiscal 2020, our previously disclosed Industrial segment comprised two operating segments, the CPG operating segment and the PCG operating segment. Each of these operating segments comprised several reporting units, all of which were tested during the annual goodwill impairment test during the fourth quarter of fiscal 2019, 2020 and 2021. Also, in connection with our Map to Growth, we realigned certain businesses and management structure within our SPG segment. As such, our former Wood Finishes Group reporting unit was split into two separate reporting units: Guardian and Wood Finishes Group. Additionally, our former Kop-Coat Group reporting unit was split into two reporting units: Kop-Coat Industrial Protection Products and Kop-Coat Group. We performed an interim goodwill impairment test for each of the new reporting units upon the change in reportable segments, business realignment and management structure using a quantitative assessment. We concluded that the estimated fair values exceeded the carrying values for these new reporting units, and accordingly, no indications of impairment were identified as a result of these changes during the first quarter of fiscal 2020. Conclusion on Annual Goodwill Impairment Tests As a result of the annual impairment assessments performed for fiscal 2021, 2020 and 2019, there were no goodwill impairments. Indefinite-Lived Intangible Assets Additionally, we test all indefinite-lived intangible assets for impairment at least annually during our fiscal fourth quarter. We follow the guidance provided by ASC 350 that simplifies how an entity tests indefinite-lived intangible assets for impairment. It provides an option to first assess qualitative factors to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying amount before applying traditional quantitative tests. We applied both qualitative and quantitative processes during our annual indefinite-lived intangible asset impairment assessments performed during the fourth quarters of fiscal 2021, 2020 and 2019. The annual impairment assessment involves estimating the fair value of each indefinite-lived asset and comparing it with its carrying amount. If the carrying amount of the intangible asset exceeds its fair value, we record an impairment loss equal to the difference. Calculating the fair value of the indefinite-lived assets requires our significant use of estimates and assumptions. We estimate the fair values of our intangible assets by applying a relief-from-royalty calculation, which includes discounted future cash flows related to each of our intangible asset’s projected revenues. In applying this methodology, we rely on a number of factors, including actual and forecasted revenues and market data. Our required annual impairment test of each of our indefinite-lived intangible assets performed during fiscal 2021, 2020 and 2019 did not result in an impairment charge. Although no impairment losses were recorded as a result of our annual impairment tests, we did record an intangible impairment charge in both fiscal 2020 and fiscal 2019. In fiscal 2020, in connection with Map to Growth, we recorded an impairment charge of $4.0 million included in restructuring expense in our Consumer reportable segment for impairment losses on indefinite-lived trade names. In fiscal 2019, we recorded an impairment charge of $4.2 million, of which $2.0 million was recorded by our CPG reportable segment for impairment losses on indefinite-lived trade names and approximately $2.2 million was recorded by our SPG reportable segment for impairment losses on definite-lived customer-related intangibles. Refer to Note C “Goodwill and Other Intangible Assets” for additional details on these indefinite-lived intangible asset impairment charges.
Advertising Costs	12) Advertising Costs Advertising costs are charged to operations when incurred and are included in SG&A expenses. For the years ended May 31, 2021, 2020 and 2019, advertising costs were $61.1 million, $49.7 million and $57.5 million, respectively.
Research and Development	13) Research and Development Research and development costs are charged to operations when incurred and are included in SG&A expenses. The amounts charged to expense for the years ended May 31, 2021, 2020 and 2019 were $77.6 million, $76.5 million and $71.6 million, respectively.
Stock-Based Compensation	14) Stock-Based Compensation Stock-based compensation represents the cost related to stock-based awards granted to our employees and directors, which may include restricted stock and stock appreciation rights (“SARs”). We measure stock-based compensation cost at the date of grant, based on the estimated fair value of the award. We recognize the cost as expense on a straight-line basis (net of estimated forfeitures) over the related vesting period. Refer to Note J, “Stock-Based Compensation,” for further information.
Investment (Income), Net	15) Investment (Income), Net Investment (income), net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Interest (income) $ (3,555 ) $ (5,313 ) $ (4,885 ) Net (gain) loss on marketable securities (38,774 ) (1,629 ) 8,366 Dividend (income) (2,121 ) (2,797 ) (4,211 ) Investment (income), net $ (44,450 ) $ (9,739 ) $ (730 ) Net (Gain) Loss on Marketable Securities Year Ended May 31, 2021 2020 2019 (In thousands) Unrealized (gains) losses on marketable equity securities $ (16,133 ) $ (1,457 ) $ 5,827 Realized (gains) losses on marketable equity securities (22,680 ) (237 ) 2,322 Realized losses on available-for-sale debt securities 39 65 217 Net (gain) loss on marketable securities $ (38,774 ) $ (1,629 ) $ 8,366
Other Expense, Net	16) Other Expense, Net Other expense, net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Royalty expense (income), net (a) $ (387 ) $ 5,206 $ (96 ) (Income) related to unconsolidated equity affiliates (516 ) (165 ) (332 ) Pension non-service costs 14,542 6,076 1,647 Loss on extinguishment of debt (b) - - 3,051 Loss on divestiture (c) - 949 - Other expense, net $ 13,639 $ 12,066 $ 4,270 (a) Includes a $5.3 million charge incurred during the fourth quarter of fiscal 2020 related to the termination of a licensing agreement within our Consumer reportable segment. (b) In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion. (c) Reflects the loss incurred upon divestiture of a contracting business located in Australia, which had reported through our PCG segment.
Income Taxes	17) Income Taxes The provision for income taxes is calculated using the asset and liability method. Under the asset and liability method, deferred income taxes are recognized for the tax effect of temporary differences between the financial statement carrying amount of assets and liabilities and the amounts used for income tax purposes and for certain changes in valuation allowances. Valuation allowances are recorded to reduce certain deferred tax assets when, in our estimation, it is more likely than not that a tax benefit will not be realized.
Earnings Per Share of Common Stock	18) Earnings Per Share of Common Stock Earnings per share (EPS) is computed using both the treasury stock and two-class method, as our unvested share-based payment awards contain rights to receive non-forfeitable dividends are considered participating securities. We calculate both Basic and Diluted EPS under each method and compare the results, reporting the method that is most dilutive. Basic EPS of common stock is computed by dividing net income by the weighted-average number of shares of common stock outstanding for the period. Diluted EPS of common stock is computed on the basis of the weighted-average number of shares of common stock, plus the effect of dilutive potential shares of common stock outstanding during the period using the treasury stock method. Dilutive potential shares of common stock include outstanding SARS, restricted stock awards and convertible notes. The treasury stock method also assumes that we use the proceeds from the hypothetical exercise of the stock compensation awards to repurchase common stock at the average market price during the period. The two-class method determines EPS for each class of common stock and participating securities according to dividends and dividend equivalents and their respective participation rights in undistributed earnings. See Note L, “Earnings Per Share,” to the Consolidated Financial Statements for additional information.
Recent Accounting Pronouncements	19) Recent Accounting Pronouncements New Pronouncements Adopted In June 2016, the FASB issued ASU 2016-13, “Financial Instruments - Credit Losses,” which requires an organization to measure all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Additionally, the standard amends the current available-for-sale securities other-than-temporary impairment model for debt securities. The guidance is effective for fiscal years beginning after December 15, 2019 and for interim periods therein. The adoption of this new guidance, effective June 1, 2020, using the modified retrospective transition method, did not result in a cumulative-effect adjustment to the opening balance of retained earnings at June 1, 2020 and did not have a material impact on our Consolidated Financial Statements. Refer to Note Q, “Revenue” for additional information. 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. The adoption of this new guidance, effective June 1, 2020, did not have a material impact on our Consolidated Financial Statements or disclosures. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820), – Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” which makes a number of changes meant to add, modify or remove certain disclosure requirements associated with the movement amongst or hierarchy associated with Level 1, Level 2 and Level 3 fair value measurements. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. The adoption of this new guidance, effective June 1, 2020, did not have a material impact on our Consolidated Financial Statements or disclosures. In August 2018, the FASB issued ASU 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20), Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans,” which makes a number of changes meant to add, modify or remove certain disclosure requirements associated with employers that sponsor defined benefit or other postretirement plans. This guidance is effective for fiscal years ending after December 15, 2020. Early adoption was permitted for all entities and the amendments in this update are required to be applied on a retrospective basis to all periods presented. The adoption of this new guidance, effective for the fiscal year ending May 31, 2021, did not have a material impact on our Consolidated Financial Statements or disclosures. New Pronouncements Issued In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740),” which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This guidance is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. Early adoption of the amendments is permitted, including adoption in any interim period for which financial statements have not yet been issued. Depending on the amendment, adoption may be applied on the retrospective, modified retrospective or prospective basis. We are currently reviewing the provisions of this new pronouncement, but do not expect our adoption of this guidance to have a material impact on our Consolidated Financial Statements.
Subsequent Event	20) Subsequent Event Share Repurchases From June 1, 2021 through July 23, 2021, we have repurchased 133,388 shares of RPM common stock since May 31, 2021, at a cost of approximately $12.5 million, or an average of $93.71 per share, under the stock repurchase program described further in Note I, “Stock Repurchase Program.”

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
Summary of Significant Accounting Policies (Tables)	May 31, 2021
Accounting Policies [Abstract]
Asset Acquired and Liabilities Assumed on Acquisition	Acquisitions are aggregated by year of purchase in the following table: Fiscal 2021 Acquisitions Fiscal 2020 Acquisitions (In thousands) Weighted-Average Intangible Asset Amortization Life (In Years) Total Weighted-Average Intangible Asset Amortization Life (In Years) Total Current assets $ 50,310 $ 10,649 Property, plant and equipment 27,012 1,694 Goodwill N/A 41,654 N/A 28,291 Trade names - indefinite lives N/A 16,694 N/A 1,555 Other intangible assets 20 53,894 16 31,046 Other long-term assets 6,831 56 Total Assets Acquired $ 196,395 $ 73,291 Liabilities assumed (24,232 ) (7,135 ) Net Assets Acquired $ 172,163 (1) $ 66,156 (2) (1) Figure includes cash acquired of $6.4 million. (2) Figure includes cash acquired of $1.6 million.
Property, Plant and Equipment	May 31, 2021 2020 (In thousands) Land $ 93,455 $ 85,860 Buildings and leasehold improvements 518,205 469,483 Machinery and equipment 1,355,822 1,199,847 Total property, plant and equipment, at cost 1,967,482 1,755,190 Less: allowance for depreciation and amortization 1,002,300 905,504 Property, plant and equipment, net $ 965,182 $ 849,686
Useful Lives	Depreciation is computed primarily using the straight-line method over the following ranges of useful lives: Buildings and leasehold improvements 1 to 50 years Machinery and equipment 1 to 40 years
Major Classes of Inventories	Inventories were composed of the following major classes: May 31, 2021 2020 (In thousands) Raw materials and supplies $ 447,220 $ 282,579 Finished goods 490,875 527,869 Total Inventory $ 938,095 $ 810,448
Investment (Income), Net	Investment (income), net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Interest (income) $ (3,555 ) $ (5,313 ) $ (4,885 ) Net (gain) loss on marketable securities (38,774 ) (1,629 ) 8,366 Dividend (income) (2,121 ) (2,797 ) (4,211 ) Investment (income), net $ (44,450 ) $ (9,739 ) $ (730 )
Net (Gain) Loss on Marketable Securities	Net (Gain) Loss on Marketable Securities Year Ended May 31, 2021 2020 2019 (In thousands) Unrealized (gains) losses on marketable equity securities $ (16,133 ) $ (1,457 ) $ 5,827 Realized (gains) losses on marketable equity securities (22,680 ) (237 ) 2,322 Realized losses on available-for-sale debt securities 39 65 217 Net (gain) loss on marketable securities $ (38,774 ) $ (1,629 ) $ 8,366
Other Expense, Net	Other expense, net, consists of the following components: Year Ended May 31, 2021 2020 2019 (In thousands) Royalty expense (income), net (a) $ (387 ) $ 5,206 $ (96 ) (Income) related to unconsolidated equity affiliates (516 ) (165 ) (332 ) Pension non-service costs 14,542 6,076 1,647 Loss on extinguishment of debt (b) - - 3,051 Loss on divestiture (c) - 949 - Other expense, net $ 13,639 $ 12,066 $ 4,270 (a) Includes a $5.3 million charge incurred during the fourth quarter of fiscal 2020 related to the termination of a licensing agreement within our Consumer reportable segment. (b) In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion. (c) Reflects the loss incurred upon divestiture of a contracting business located in Australia, which had reported through our PCG segment.

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
Restructuring (Tables)	May 31, 2021
Restructuring And Related Activities [Abstract]
Summary of Charges Recorded in Connection with Restructuring by Reportable Segment	A summary of the charges recorded in connection with restructuring by reportable segment during is as follows: Year Ended Year Ended Year Ended Cumulative Costs Total Expected (in thousands) May 31, 2021 May 31, 2020 May 31, 2019 to Date Costs CPG Segment: Severance and benefit costs (a) $ 3,194 $ 6,866 $ 9,459 $ 21,288 $ 21,534 Facility closure and other related costs 2,103 1,508 1,924 6,580 7,836 Other asset write-offs 38 352 215 1,978 1,978 Total Charges $ 5,335 $ 8,726 $ 11,598 $ 29,846 $ 31,348 PCG Segment: Severance and benefit costs (b) $ 2,974 $ 6,973 $ 6,012 $ 16,359 $ 16,900 Facility closure and other related costs 1,282 1,873 3,474 6,629 7,735 Other asset write-offs 316 248 353 917 917 Total Charges $ 4,572 $ 9,094 $ 9,839 $ 23,905 $ 25,552 Consumer Segment: Severance and benefit costs (c) $ 1,840 $ 3,089 $ 1,726 $ 12,307 $ 12,307 Facility closure and other related costs 3,147 2,245 1,553 12,081 14,024 Other asset write-offs 301 4,094 25 4,420 4,420 Total Charges $ 5,288 $ 9,428 $ 3,304 $ 28,808 $ 30,751 SPG Segment: Severance and benefit costs (d) $ 1,197 $ 1,592 $ 5,338 $ 8,127 $ 9,504 Facility closure and other related costs 1,424 2,922 1,244 5,590 6,460 Other asset write-offs 99 119 1,003 1,221 1,221 Total Charges $ 2,720 $ 4,633 $ 7,585 $ 14,938 $ 17,185 Corporate/Other Segment: Severance and benefit costs (e) $ 191 $ 1,227 $ 9,984 $ 13,538 $ 13,538 Total Charges $ 191 $ 1,227 $ 9,984 $ 13,538 $ 13,538 Consolidated: Severance and benefit costs $ 9,396 $ 19,747 $ 32,519 $ 71,619 $ 73,783 Facility closure and other related costs 7,956 8,548 8,195 30,880 36,055 Other asset write-offs 754 4,813 1,596 8,536 8,536 Total Charges $ 18,106 $ 33,108 $ 42,310 $ 111,035 $ 118,374 a) Severance and benefit costs are associated with the elimination of 34 positions, 112 positions and 109 positions during fiscal 2021, 2020 and 2019, respectively. Additionally, $0.2 million included in the fiscal year 2019 charges are associated with the prior elimination of one position within the legal function during fiscal 2018. b) Severance and benefit costs are associated with the elimination of 71 positions, 161 positions and 114 positions during fiscal 2021, 2020 and 2019, respectively. c) Severance and benefit costs are associated with the elimination of 29 positions, 92 positions and 21 positions during fiscal 2021, 2020 and 2019, respectively. d) Severance and benefit costs are associated with the elimination of 35 positions and 94 positions and 130 positions during fiscal 2021, 2020 and 2019, respectively. e) Severance and benefit costs are associated with the elimination of two positions during fiscal 2020. Also reflects fiscal 2019 charges related to the severance of two corporate executives, as well as accelerated vesting of equity awards for two corporate executives, four SPG segment executives and three CPG segment executives in connection with the aforementioned restructuring activities.
Summary of Activity in Restructuring Reserves	A summary of the activity in the restructuring reserves related to our MAP to Growth is as follows: (in thousands) Severance and Benefits Costs Facility Closure and Other Related Costs Other Asset Write-Offs Total Balance at June 1, 2019 $ 4,837 $ 7,857 $ - $ 12,694 Additions charged to expense 19,747 8,548 4,813 33,108 Cash payments charged against reserve (17,038 ) (9,239 ) - (26,277 ) Non-cash charges and other adjustments (189 ) (1,286 ) (4,813 ) (6,288 ) Balance at May 31, 2020 $ 7,357 $ 5,880 $ - $ 13,237 Additions charged to expense 9,396 7,956 754 18,106 Cash payments charged against reserve (12,413 ) (8,268 ) (335 ) (21,016 ) Non-cash charges and other adjustments 90 (4,278 ) (419 ) (4,607 ) Balance at May 31, 2021 $ 4,430 $ 1,290 $ - $ 5,720

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	May 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill, by Reportable Segment	The changes in the carrying amount of goodwill, by reportable segment, for the years ended May 31, 2021 and 2020, are as follows: CPG PCG Consumer SPG (In thousands) Segment Segment Segment Segment Total Balance as of June 1, 2019 $ 407,429 $ 185,259 $ 499,387 $ 153,687 $ 1,245,762 Acquisitions 14,689 3,023 - 10,352 28,064 Translation adjustments & other (1) (16,764 ) (2,878 ) (3,169 ) (949 ) (23,760 ) Balance as of May 31, 2020 405,354 185,404 496,218 163,090 1,250,066 Acquisitions 2,295 16,174 20,126 2,134 40,729 Translation adjustments & other 35,866 5,460 8,886 4,747 54,959 Balance as of May 31, 2021 $ 443,515 $ 207,038 $ 525,230 $ 169,971 $ 1,345,754 (1) Activity includes a $2.3 million decrease to goodwill within our Consumer segment related to adjustments to preliminary purchase price allocations, primarily due to deferred tax adjustments.
Other Intangible Assets Major Classes	Other intangible assets consist of the following major classes: Gross Net Other Amortization Carrying Accumulated Intangible (In thousands) Period (In Years) Amount Amortization Assets As of May 31, 2021 Amortized intangible assets Formulae 9 to 33 $ 234,037 $ (172,989 ) $ 61,048 Customer-related intangibles 5 to 33 505,710 (233,496 ) 272,214 Trademarks/names 5 to 40 34,326 (20,575 ) 13,751 Other 5 to 33 34,086 (25,707 ) 8,379 Total Amortized Intangibles 808,159 (452,767 ) 355,392 Indefinite-lived intangible assets Trademarks/names 273,301 - 273,301 Total Other Intangible Assets $ 1,081,460 $ (452,767 ) $ 628,693 As of May 31, 2020 Amortized intangible assets Formulae 9 to 33 $ 230,621 $ (160,771 ) $ 69,850 Customer-related intangibles 5 to 33 439,153 (197,752 ) 241,401 Trademarks/names 5 to 40 30,700 (17,224 ) 13,476 Other 1 to 33 32,224 (23,281 ) 8,943 Total Amortized Intangibles 732,698 (399,028 ) 333,670 Indefinite-lived intangible assets Trademarks/names 250,710 - 250,710 Total Other Intangible Assets $ 983,408 $ (399,028 ) $ 584,380

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
Marketable Securities (Tables)	May 31, 2021
Investments Debt And Equity Securities [Abstract]
Summary of Available-for-Sale Debt Securities by Asset Type	The following tables summarize available-for-sale debt securities held at May 31, 2021 and 2020 by asset type: Available-For-Sale Debt Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2021 Fixed maturity: U.S. treasury and other government $ 26,154 $ 593 $ (184 ) $ 26,563 Corporate bonds 143 39 - 182 Total available-for-sale debt securities $ 26,297 $ 632 $ (184 ) $ 26,745 Available-For-Sale Debt Securities (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (Net Carrying Amount) May 31, 2020 Fixed maturity: U.S. treasury and other government $ 25,462 $ 1,314 $ (40 ) $ 26,736 Corporate bonds 143 43 - 186 Total available-for-sale debt securities $ 25,605 $ 1,357 $ (40 ) $ 26,922
Summary of Available-for-Sale Debt Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive (Loss), Aggregated by Length of Time Investments	Summarized below are the available-for-sale debt securities we held at May 31, 2021 and 2020 that were in an unrealized loss position and that were included in accumulated other comprehensive income (loss), aggregated by the length of time the investments had been in that position: May 31, 2021 May 31, 2020 (In thousands) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Total investments with unrealized losses $ 8,420 $ (184 ) $ 2,028 $ (40 ) Unrealized losses with a loss position for less than 12 months 6,920 (152 ) - - Unrealized losses with a loss position for more than 12 months 1,500 (32 ) 2,028 (40 )
Net Carrying Values of Debt Securities by Contractual Maturity	The net carrying values of available-for-sale debt securities at May 31, 2021, 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 Cost Fair Value Due: Less than one year $ 3,892 $ 3,890 One year through five years 14,591 14,964 Six years through ten years 5,221 5,318 After ten years 2,593 2,573 $ 26,297 $ 26,745

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
Fair Value Measurements (Tables)	May 31, 2021
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 addition, with respect to our derivative assets and liabilities measured at fair value, refer to Note F – Derivatives and Hedging for discussion of their classification within the fair value hierarchy. (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 Available-for-sale debt securities: U.S. Treasury and other government $ - $ 26,563 $ - $ 26,563 Corporate bonds - 182 - 182 Total available-for-sale debt securities - 26,745 - 26,745 Marketable equity securities: Stocks-foreign 768 - - 768 Stocks-domestic 6,975 - - 6,975 Mutual funds - foreign - 47,916 - 47,916 Mutual funds - domestic - 86,428 - 86,428 Total marketable equity securities 7,743 134,344 - 142,087 Contingent consideration - - (13,335 ) (13,335 ) Total $ 7,743 $ 161,089 $ (13,335 ) $ 155,497 (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 Available-for-sale debt securities: U.S. Treasury and other government $ - $ 26,736 $ - $ 26,736 Corporate bonds - 186 - 186 Total available-for-sale debt securities - 26,922 - 26,922 Marketable equity securities: Stocks-domestic 3,870 - - 3,870 Mutual funds - foreign - 28,815 - 28,815 Mutual funds - domestic - 63,536 - 63,536 Total marketable equity securities 3,870 92,351 - 96,221 Contingent consideration - - (15,682 ) (15,682 ) Total $ 3,870 $ 119,273 $ (15,682 ) $ 107,461
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 May 31, 2021 and 2020 are as follows: At May 31, 2021 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 246,704 $ 246,704 Marketable equity securities 142,087 142,087 Available-for-sale debt securities 26,745 26,745 Long-term debt, including current portion 2,379,826 2,570,206 At May 31, 2020 (In thousands) Carrying Value Fair Value Cash and cash equivalents $ 233,416 $ 233,416 Marketable equity securities 87,111 87,111 Available-for-sale debt securities 26,922 26,922 Long-term debt, including current portion 2,539,180 2,618,719

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	12 Months Ended
Derivatives and Hedging (Tables)	May 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Derivatives Instruments for Gains or Losses Initially Recognized in AOCI in Consolidated Balance Sheet	The following table summarizes the location and effects of our derivatives instruments on the Consolidated Statements of Comprehensive Income and Consolidated Statements of Income for gains or losses initially recognized in AOCI in the Consolidated Balance Sheet: Pretax gain/(loss) recognized in AOCI Pretax gain/(loss) reclassified from AOCI into income (In thousands) Year Ended May 31, Year Ended May 31, Derivatives in hedging relationships 2021 2020 2019 Income Statement Location 2021 2020 2019 Interest Rate Swap (Cash Flow) $ (1,226 ) $ (7,998 ) $ - Interest (Expense) Income $ (3,380 ) $ 170 $ - Cross Currency Swap (Cash Flow) (9,207 ) (2,254 ) - Interest Income 638 554 - Cross Currency Swap (Cash Flow) - - - Foreign Exchange (Loss) (9,874 ) (2,654 ) - Cross Currency Swap (Net Investment) (31,380 ) 1,866 4,998 Gain or (loss) on sale of subsidiary - - - Total $ (41,813 ) $ (8,386 ) $ 4,998 $ (12,616 ) $ (1,930 ) $ -
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 May 31, 2021 and May 31, 2020 are as follows: (In thousands) Fair Value Derivatives Designated as Hedging Instruments Balance Sheet Location May 31, 2021 May 31, 2020 Assets: Cross Currency Swap (Net Investment) Other Current Assets $ 6,233 $ 5,352 Cross Currency Swap (Cash Flow) Other Current Assets 516 750 Cross Currency Swap (Net Investment) Other Assets (Long-Term) - 12,409 Liabilities: Interest Rate Swap (Cash Flow) Other Accrued Liabilities 3,547 2,981 Cross Currency Swap (Net Investment) Other Accrued Liabilities 1,321 294 Cross Currency Swap (Net Investment) Other Long-Term Liabilities 39,228 18,204 Cross Currency Swap (Cash Flow) Other Long-Term Liabilities 13,786 3,608 Interest Rate Swap (Cash Flow) Other Long-Term Liabilities 2,467 5,187 (In thousands) Fair Value Derivatives Not Designated as Hedging Instruments Balance Sheet Location May 31, 2021 May 31, 2020 Assets: Foreign Currency Exchange Other Current Assets $ 212 $ - Liabilities: Foreign Currency Exchange Other Accrued Liabilities - 53

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
Borrowings (Tables)	May 31, 2021
Debt Disclosure [Abstract]
Description of Long-Term Debt	A description of long-term debt follows: May 31, 2021 2020 (In thousands) Revolving credit facility with a syndicate of banks, through October 31, 2023(1) $ 336,996 $ 419,317 Accounts receivable securitization program with two banks, through May 21, 2024 (2) - 79,756 Unsecured 3.45% senior notes due November 15, 2022 (3) 300,387 300,615 Unsecured $100M Term Loan due February 21, 2023 (4) 99,880 99,810 Unsecured $300M Term Loan due February 21, 2023 (4) 299,640 299,431 Unsecured 3.75% notes due March 15, 2027 (5) 397,527 397,058 Unsecured 4.55% senior notes due March 1, 2029 (6) 346,904 346,514 Unsecured 5.25% notes due June 1, 2045 (7) 298,745 298,668 Unsecured 4.25% notes due January 15, 2048 (8) 296,714 296,590 Other obligations, including finance leases and unsecured notes payable at various rates of interest due in installments through 2027 3,033 1,421 2,379,826 2,539,180 Less: current portion 1,282 80,890 Total Long-Term Debt, Less Current Maturities $ 2,378,544 $ 2,458,290 (1) Interest at May 31, 2021 was tied to LIBOR and averaged 1.4609% for USD denominated debt ($37.7 million), 1.3950% for AUD denominated debt ($44.0 million) and 1.3750% on EUR denominated debt ($257.9 million). Interest at May 31, 2020 was tied to LIBOR and averaged 1.5505% for USD denominated debt ($218.3 million), 1.4650% for AUD denominated debt ($37.2 million) and 1.3750% on EUR denominated debt ($167.5 million). At May 31, 2021 and 2020, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $3.7 million, respectively. (2) At May 31, 2020, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.2 million, respectively. (3) The $300.0 million face amount of the notes due 2022 is adjusted for the amortization of the original issue discount and mark-to-market derivative asset of approximated $0.1 million and ($0.8 million) at May 31, 2021 and approximated $0.1 million and ($1.3 million) at May 31, 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.465%. At May 31, 2021 and 2020, the notes are reduced by debt issuance costs, net of amortization, for approximately $0.4 million and $0.6 million, respectively. (4) At May 31, 2021 and 2020, the Term Loan is adjusted for deferred financing fees, net of amortization, of approximately $0.5 million and $0.8 million, respectively. (5) The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.3 million and $2.6 million, respectively. (6) The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.4 million and $0.5 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568% (7) The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.4 million at May 31, 2021 and 2020. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.9 million at May 31, 2021 and 2020. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $2.9 million, respectively. (8) The $ 300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $ 3.3 million and $ 3.4 million at May 31, 2021 and 2020, respectively. The effective interest rate on the notes is 4.25 %.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	May 31, 2021
Income Tax Disclosure [Abstract]
Income before Income Taxes	Income before income taxes as shown in the Consolidated Statements of Income is summarized below for the periods indicated. Year Ended May 31, 2021 2020 2019 (In thousands) United States $ 462,468 $ 317,290 $ 215,201 Foreign 205,970 90,474 124,644 Income Before Income Taxes $ 668,438 $ 407,764 $ 339,845
Provision (Benefit) for Income Tax	Provision (benefit) for income taxes consists of the following for the periods indicated: Year Ended May 31, 2021 2020 2019 (In thousands) Current: U.S. federal $ 60,666 $ 65,195 $ 20,388 State and local 18,959 17,743 8,623 Foreign 65,125 31,894 37,713 Total Current 144,750 114,832 66,724 Deferred: U.S. federal 20,027 (19,212 ) 15,298 State and local 3,878 (3,031 ) 1,414 Foreign (3,717 ) 10,093 (11,278 ) Total Deferred 20,188 (12,150 ) 5,434 Provision for Income Taxes $ 164,938 $ 102,682 $ 72,158
Significant Components of Deferred Income Tax Assets and Liabilities	The significant components of deferred income tax assets and liabilities as of May 31, 2021 and 2020 were as follows: 2021 2020 (In thousands) Deferred income tax assets related to: Inventories $ 12,189 $ 12,341 Allowance for losses - 4,294 Accrued compensation and benefits 24,637 14,686 Accrued other expenses 28,511 15,107 Deferred income and other long-term liabilities 22,859 22,030 Credit and net operating and capital loss carryforwards 65,091 65,994 Net unrealized loss on securities 9,189 16,892 Pension and other postretirement benefits 34,180 76,147 Total Deferred Income Tax Assets 196,656 227,491 Less: valuation allowances (64,696 ) (66,855 ) Net Deferred Income Tax Assets 131,960 160,636 Deferred income tax (liabilities) related to: Depreciation (85,717 ) (70,588 ) Amortization of intangibles (107,963 ) (109,926 ) Unremitted foreign earnings (17,871 ) (8,781 ) Total Deferred Income Tax (Liabilities) (211,551 ) (189,295 ) Deferred Income Tax Assets (Liabilities), Net $ (79,591 ) $ (28,659 )
Reconciliation of Income Tax Expense (Benefit) Computed by Applying U.S. Statutory Federal Income Tax Rate against Income (Loss) before Income Taxes to Provision (Benefit) for Income Taxes	The following table reconciles income tax expense (benefit) computed by applying the U.S. statutory federal income tax rate against income (loss) before income taxes to the provision (benefit) for income taxes: Year Ended May 31, 2021 2020 2019 (In thousands, except percentages) Income tax expense at the U.S. statutory federal income tax rate $ 140,372 $ 85,630 $ 71,367 Foreign rate differential and other foreign tax adjustments 11,942 3,433 (1,571 ) State and local income taxes, net 18,625 11,651 7,224 Impact of GILTI provisions 1,598 3,051 5,772 Nondeductible business expense 616 2,005 2,259 Valuation allowance (4,389 ) 14,008 7,021 Deferred tax liability for unremitted foreign earnings 5,348 (5,527 ) - Changes in unrecognized tax benefits (1,847 ) 1,292 (8,480 ) Other 1,324 (3,351 ) 1,195 FY19 GILTI impact of issued regulations - (4,348 ) - Equity-based compensation (8,651 ) (5,162 ) (4,496 ) Transition tax liability - - (1,868 ) Remeasurement of U.S. deferred income taxes - - (6,265 ) Provision for Income Tax Expense $ 164,938 $ 102,682 $ 72,158 Effective Income Tax Rate 24.7 % 25.2 % 21.2 %
Activity Related to Unrecognized Tax Benefits	Uncertain income tax positions are accounted for in accordance with ASC 740. The following table summarizes the activity related to unrecognized tax benefits: (In millions) 2021 2020 2019 Balance at June 1 $ 9.0 $ 8.1 $ 14.1 Additions based on tax positions related to current year - - 0.1 Additions for tax positions of prior years - 2.0 2.0 Reductions for tax positions of prior years (1.8 ) (0.9 ) (7.9 ) Foreign currency translation 0.3 (0.2 ) (0.2 ) Balance at May 31 $ 7.5 $ 9.0 $ 8.1

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
Stock-Based Compensation (Tables)	May 31, 2021
Stock-Based Compensation Expense Included in Consolidated Statements of Income	The following table represents total stock-based compensation expense included in our Consolidated Statements of Income: Year Ended May 31, 2021 2020 2019 (In thousands) Stock-based compensation expense, included in SG&A $ 40,926 $ 19,789 $ 31,154 Stock-based compensation expense, included in restructuring expense 47 116 4,283 Total stock-based compensation cost 40,973 19,905 35,437 Income tax (benefit) (6,877 ) (2,784 ) (6,937 ) Total stock-based compensation cost, net of tax $ 34,096 $ 17,121 $ 28,500
Summary of Weighted-Average Assumptions Related to SARs Grants	The following is a summary of our weighted-average assumptions related to SARs grants made during the last three fiscal years: Year Ended May 31, 2021 2020 2019 Risk-free interest rate 0.4 % 1.9 % 2.9 % Expected life of option 6.5 yrs 6.5 yrs 6.5 yrs Expected dividend yield 1.8 % 2.3 % 2.1 % Expected volatility rate 24.0 % 22.4 % 25.2 %
Summary of Option and Share-Based Payment Activity	The following tables summarize option and share-based payment activity (including SARs) under these plans during the fiscal year ended May 31, 2021: 2021 Share-Based Payments Weighted Average Exercise Price Number of Shares Under Option (Shares in thousands) Balance at June 1, 2020 $ 49.88 2,482 Options granted 78.49 360 Options exercised 39.69 (837 ) Balance at May 31, 2021 59.28 2,005 Exercisable at May 31, 2021 $ 52.56 1,107 SARs 2021 2020 2019 (In thousands, except per share amounts) Weighted-average grant-date fair value per SAR $ 14.38 $ 11.59 $ 14.08 Intrinsic value of options exercised $ 8.80 $ 9.62 $ 9.29 Tax benefit from options exercised $ 8,821 $ 5,936 $ 3,210 Fair value of SARS vested $ 12.59 $ 12.27 $ 9.30
Directors Equity Incentive Plan 2003
Summary of Share-Based Performance Earned Restricted Stock Activity and Restricted Stock Units	The following table summarizes the share-based activity under the 2003 Plan and 2014 Omnibus Plan related to directors during fiscal 2021: Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 60.25 62 Shares granted to directors 87.35 19 Shares vested 56.02 (25 ) Balance at May 31, 2021 $ 71.19 56
2007 Plan and 2014 Omnibus Plan
Summary of Share-Based Performance Earned Restricted Stock Activity and Restricted Stock Units	The following table sets forth such awards for the year ended May 31, 2021: Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 33.82 446 Shares granted 78.49 35 Shares exercised 33.25 (63 ) Balance at May 31, 2021 $ 37.89 418
Performance Earned Restricted Stock Awards
Summary of Share-Based Performance Earned Restricted Stock Activity and Restricted Stock Units	The following table summarizes the share-based performance-earned restricted stock (“PERS”) and performance stock units (“PSUs”) activity during the fiscal year ended May 31, 2021: Weighted-Average Grant-Date Fair Value 2021 (Shares in thousands) Balance at June 1, 2020 $ 60.51 865 Shares granted 80.67 427 Shares forfeited 65.24 (18 ) Shares vested 53.69 (158 ) Balance at May 31, 2021 $ 69.13 1,116
Nonvested Shares
Summary of Share-Based Performance Earned Restricted Stock Activity and Restricted Stock Units	The following table summarizes the activity for all nonvested restricted shares during the year ended May 31, 2021: Weighted-Average Grant-Date Fair Number of Value Shares (Shares in thousands) Balance at June 1, 2020 $ 58.03 1,120 Granted 80.77 481 Vested 49.95 (250 ) Forfeited 65.24 (18 ) Balance at May 31, 2021 $ 67.65 1,333

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	May 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income (loss) consists of the following components: Pension And Other Postretirement Unrealized Unrealized Foreign Benefit Gain Gain (Loss) Currency Liability (Loss) On On Translation Adjustments, Derivatives, Securities, (In thousands) Adjustments Net of Tax Net of Tax Net of Tax Total Balance at June 1, 2018 $ (300,013 ) $ (157,495 ) $ (131 ) $ (1,409 ) $ (459,048 ) Reclassification adjustments for gains included in net income, net of taxes of $151 - - - 1,777 1,777 Other comprehensive income (73,660 ) (70,785 ) 4,713 307 (139,425 ) Deferred taxes 3,178 16,635 (203 ) (542 ) 19,068 Balance at May 31, 2019 (370,495 ) (211,645 ) 4,379 133 (577,628 ) Reclassification adjustments for gains (losses) included in net income, net of taxes of $0 - - - - - Other comprehensive income (71,820 ) (86,347 ) (6,315 ) 1,210 (163,272 ) Deferred taxes 1,583 20,275 1,865 (320 ) 23,403 Balance at May 31, 2020 (440,732 ) (277,717 ) (71 ) 1,023 (717,497 ) Reclassification adjustments for gains included in net income, net of taxes of $77 - - - 191 191 Other comprehensive income 148,360 113,984 (31,087 ) (1,052 ) 230,205 Deferred taxes (7,993 ) (26,877 ) 7,176 (89 ) (27,783 ) Balance at May 31, 2021 $ (300,365 ) $ (190,610 ) $ (23,982 ) $ 73 $ (514,884 )

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
Earnings Per Share (Tables)	May 31, 2021
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 for the years ended May 31, 2021, 2020 and 2019: Year Ended May 31, 2021 2020 2019 (In thousands, except per share amounts) Numerator for earnings per share: Net income attributable to RPM International Inc. stockholders $ 502,643 $ 304,385 $ 266,558 Less: Allocation of earnings and dividends to participating securities (4,018 ) (1,956 ) (1,514 ) Net income available to common shareholders - basic 498,625 302,429 265,044 Reverse: Allocation of earnings and dividends to participating securities - 1,956 1,514 Add: Undistributed earnings reallocated to unvested shareholders 13 - - Add: Income effect of contingently issuable shares - - 3,655 Net income available to common shareholders - diluted $ 498,638 $ 304,385 $ 270,213 Denominator for basic and diluted earnings per share: Basic weighted average common shares 128,334 128,468 130,552 Average diluted options 593 1,506 1,838 Net issuable common share equivalents (1) - - 1,943 Total shares for diluted earnings per share (2) 128,927 129,974 134,333 Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders: Basic Earnings Per Share of Common Stock $ 3.89 $ 2.35 $ 2.03 Method used to calculate basic earnings per share Two-Class Two-Class Two-Class Diluted Earnings Per Share of Common Stock $ 3.87 $ 2.34 $ 2.01 Method used to calculate diluted earnings per share Two-Class Treasury Treasury (1) Represents the number of shares that would be issued if our contingently convertible notes had been converted. We included these shares in the calculation of diluted EPS as the conversion of the notes were eligible to be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. On November 27, 2018, we redeemed all of our 2.25% convertible senior notes due 2020, primarily for cash, but also issued 598,601 shares of our common stock in the transaction. (2) For the years ended May 31, 2021, 2020 and 2019, approximately 362,016, 340,000 and 862,500 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	May 31, 2021
Leases [Abstract]
Summary of Lease Costs	The following represents our lease costs as of May 31, 2021 and 2020: May 31, 2021 2020 (In thousands) Operating lease expense $ 76,581 $ 73,665 Variable lease expense 9,292 7,243 Short-term lease expense 2,022 2,583
Summary of Supplemental Cash Flow, Balance Sheet, and Other Required Disclosures	The following represents our supplemental cash flow, balance sheet, and other required disclosures as of May 31, 2021 and 2020: May 31, 2021 2020 (In thousands) Operating cash outflows from operating leases $ 71,257 $ 69,444 Leased assets obtained in exchange for operating lease obligations 69,375 61,614 Current portion of operating leases within Other Accrued Liabilities $ 58,563 $ 52,589 Weighted average remaining lease term for operating leases (in years) 8.6 9.1 Weighted average discount rate for operating leases 3.4 % 3.7 %
Schedule of Future Undiscounted Cash Flows and Reconciliation to Lease Liabilities	The following represents our future undiscounted cash flows for each of the next five years and thereafter and reconciliation to the lease liabilities, as of May 31, 2021: (In thousands) Year ending May 31, Operating Leases 2022 $ 67,058 2023 54,667 2024 42,986 2025 34,464 2026 29,655 Thereafter 142,155 Total lease payments $ 370,985 Less imputed interest 55,007 Total present value of lease liabilities $ 315,978

Pension Plans (Tables)

Pension Plans (Tables) - Pension Benefits	12 Months Ended
Pension Plans (Tables) - Pension Benefits	May 31, 2021
Components of Net Periodic Pension and Postretirement Costs	Net periodic pension cost consisted of the following for the year ended May 31: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2019 2021 2020 2019 Service cost $ 44,520 $ 39,425 $ 37,528 $ 6,355 $ 5,400 $ 4,693 Interest cost 15,223 20,415 21,987 5,308 4,842 5,420 Expected return on plan assets (33,115 ) (34,291 ) (33,867 ) (7,286 ) (7,118 ) (7,907 ) Amortization of: Prior service cost 8 9 118 (150 ) (36 ) (30 ) Net actuarial losses recognized 30,005 18,516 13,087 2,377 2,029 1,229 Curtailment/settlement losses - - - 356 86 89 Net Pension Cost $ 56,641 $ 44,074 $ 38,853 $ 6,960 $ 5,203 $ 3,494
Changes in Benefit Obligations and Plan Assets	The changes in benefit obligations and plan assets, as well as the funded status of our pension plans at May 31, 2021 and 2020, were as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Benefit obligation at beginning of year $ 762,739 $ 660,277 $ 210,278 $ 205,967 Service cost 44,520 39,425 6,355 5,400 Interest cost 15,223 20,415 5,308 4,842 Benefits paid (64,139 ) (41,186 ) (9,248 ) (6,269 ) Participant contributions - - 1,140 1,106 Plan amendments - - - (893 ) Plan combination - - - 922 Plan settlements/curtailments - - (2,342 ) (288 ) Actuarial losses/(gains) 63,730 83,808 (7,774 ) 2,718 Premiums paid - - (103 ) (99 ) Currency exchange rate changes - - 28,414 (3,128 ) Benefit Obligation at End of Year $ 822,073 $ 762,739 $ 232,028 $ 210,278 Fair value of plan assets at beginning of year $ 516,550 $ 496,865 $ 194,874 $ 187,112 Actual return on plan assets 157,702 8,689 21,350 9,899 Employer contributions 62,264 52,182 7,119 6,331 Participant contributions - - 1,140 1,106 Benefits paid (64,139 ) (41,186 ) (9,248 ) (6,269 ) Plan combination - - - 182 Premiums paid - - (103 ) (99 ) Plan settlements/curtailments - - (2,327 ) (281 ) Currency exchange rate changes - - 27,048 (3,107 ) Fair Value of Plan Assets at End of Year $ 672,377 $ 516,550 $ 239,853 $ 194,874 (Deficit)/Surplus of plan assets versus benefit obligations at end of year $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 ) Net Amount Recognized $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 ) Accumulated Benefit Obligation $ 702,315 $ 662,197 $ 217,012 $ 197,167
Amounts Recognized in Consolidated Balance Sheet	Amounts recognized in the Consolidated Balance Sheets for the years ended May 31, 2021 and 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Noncurrent assets $ - $ - $ 22,698 $ 13,395 Current liabilities (8 ) (8 ) (471 ) (547 ) Noncurrent liabilities (149,688 ) (246,181 ) (14,402 ) (28,252 ) Net Amount Recognized $ (149,696 ) $ (246,189 ) $ 7,825 $ (15,404 )
Relationship between Plans Benefit Obligations and Assets	The following table summarizes the relationship between our plans' benefit obligations and assets: U.S. Plans 2021 2020 (In thousands) Benefit Obligation Plan Assets Benefit Obligation Plan Assets Plans with projected benefit obligations in excess of plan assets $ 822,073 $ 672,377 $ 762,739 $ 516,550 Plans with accumulated benefit obligations in excess of plan assets 702,315 672,377 662,197 516,550 Plans with assets in excess of projected benefit obligations - - - - Plans with assets in excess of accumulated benefit obligations - - - - Non-U.S. Plans 2021 2020 (In thousands) Benefit Obligation Plan Assets Benefit Obligation Plan Assets Plans with projected benefit obligations in excess of plan assets $ 45,294 $ 30,421 $ 163,589 $ 134,791 Plans with accumulated benefit obligations in excess of plan assets 43,522 30,421 150,478 134,598 Plans with assets in excess of projected benefit obligations 186,734 209,432 46,689 60,083 Plans with assets in excess of accumulated benefit obligations 173,490 209,432 46,689 60,276
Pretax Net Actuarial Loss and Prior Service (Costs) Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings	The following table presents the pretax net actuarial loss and prior service (costs) recognized in accumulated other comprehensive income (loss) not affecting retained earnings: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Net actuarial loss $ (250,317 ) $ (341,179 ) $ (30,045 ) $ (48,090 ) Prior service (costs) credits (12 ) (20 ) 1,023 1,098 Total recognized in accumulated other comprehensive income not affecting retained earnings $ (250,329 ) $ (341,199 ) $ (29,022 ) $ (46,992 )
Changes Recognized in Other Comprehensive Income	The following table includes the changes recognized in other comprehensive income: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Changes in plan assets and benefit obligations recognized in other comprehensive income: Prior service cost $ - $ - $ - $ (893 ) Net loss (gain) arising during the year (60,857 ) 109,409 (21,838 ) (70 ) Effect of exchange rates on amounts included in AOCI - - 6,465 (922 ) Amounts recognized as a component of net periodic benefit cost: Amortization or curtailment recognition of prior service (cost) benefit (8 ) (9 ) 150 36 Amortization or settlement recognition of net (loss) (30,005 ) (18,516 ) (2,748 ) (2,115 ) Total recognized in other comprehensive loss (income) $ (90,870 ) $ 90,884 $ (17,971 ) $ (3,964 )
Weighted-Average Assumptions used to Determine Benefit Obligations and Net Periodic and Postretirement Costs	The following weighted-average assumptions were used to determine our year-end benefit obligations and net periodic pension cost under the plans: U.S. Plans Non-U.S. Plans Year-End Benefit Obligations 2021 2020 2021 2020 Discount rate 2.75 % 2.77 % 2.72 % 2.49 % Rate of compensation increase 3.19 % 3.19 % 2.91 % 2.86 % U.S. Plans Non-U.S. Plans Net Periodic Pension Cost 2021 2020 2019 2021 2020 2019 Discount rate 2.78 % 3.65 % 4.12 % 2.49 % 2.61 % 3.09 % Expected return on plan assets 7.00 % 7.40 % 7.40 % 3.30 % 3.91 % 4.30 % Rate of compensation increase 3.19 % 3.80 % 3.80 % 2.86 % 2.86 % 2.85 %
Weighted-Average Actual and Target Allocation of Plan Assets	The following tables illustrate the weighted-average actual and target allocation of plan assets: U.S. Plans Target Allocation Actual Asset Allocation (Dollars in millions) as of May 31, 2021 2021 2020 Equity securities 55 % $ 387.1 $ 261.0 Fixed income securities 25 % 112.0 106.4 Multi-class 20 % 150.8 118.2 Cash (1) 22.3 30.8 Other 0.2 0.2 Total assets 100 % $ 672.4 $ 516.6 Non-U.S. Plans Target Allocation Actual Asset Allocation (Dollars in millions) as of May 31, 2021 2021 2020 Equity securities 37 % $ 103.4 $ 79.3 Fixed income securities 47 % 108.2 88.2 Cash 0.1 0.1 Property and other 16 % 28.2 27.3 Total assets 100 % $ 239.9 $ 194.9 (1) The larger than target cash position at May 31, 2021 results from our February 2021 contribution to the RPM International Inc. Retirement Plan because of our plans to invest the February contribution over a period of time, due to dollar cost averaging.
Pension Plan Assets Categorized using Fair Value Hierarchy	The following tables present our pension plan assets as categorized using the fair value hierarchy at May 31, 2021 and 2020: U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 U.S. Treasury and other government $ - $ 20,752 $ - $ 20,752 State and municipal bonds - 767 - 767 Foreign bonds - 1,068 - 1,068 Mortgage-backed securities - 17,628 - 17,628 Corporate bonds - 42,370 - 42,370 Stocks - large cap 40,332 - - 40,332 Mutual funds - equity - 346,790 - 346,790 Mutual funds - multi-class - 150,838 - 150,838 Mutual funds - fixed - 29,440 - 29,440 Cash and cash equivalents 22,224 - - 22,224 Limited partnerships - - 168 168 Total $ 62,556 $ 609,653 $ 168 $ 672,377 Non-U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2021 Pooled equities $ - $ 101,975 $ - $ 101,975 Pooled fixed income - 107,457 - 107,457 Foreign bonds - 717 - 717 Insurance contracts - - 28,230 28,230 Mutual funds - 1,397 - 1,397 Cash and cash equivalents 77 - - 77 Total $ 77 $ 211,546 $ 28,230 $ 239,853 U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 U.S. Treasury and other government $ - $ 12,973 $ - $ 12,973 State and municipal bonds - 508 - 508 Foreign bonds - 715 - 715 Mortgage-backed securities - 23,824 - 23,824 Corporate bonds - 34,317 - 34,317 Stocks - large cap 19,589 - - 19,589 Mutual funds - equity - 241,426 - 241,426 Mutual funds - multi-class - 118,205 - 118,205 Mutual funds - fixed - 33,993 - 33,993 Cash and cash equivalents 30,830 - - 30,830 Limited partnerships - - 170 170 Total $ 50,419 $ 465,961 $ 170 $ 516,550 Non-U.S. Plans (In thousands) Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Fair Value at May 31, 2020 Pooled equities $ - $ 78,472 $ - $ 78,472 Pooled fixed income - 87,610 - 87,610 Foreign bonds - 603 - 603 Insurance contracts - - 27,267 27,267 Mutual funds - 855 - 855 Cash and cash equivalents 67 - - 67 Total $ 67 $ 167,540 $ 27,267 $ 194,874
Activity that Occurred for Level Three Assets	The following table includes the activity that occurred during the years ended May 31, 2021 and 2020 for our Level 3 assets: Actual Return on Plan Assets For: Balance at Assets Still Held Assets Sold Purchases, Sales and Balance at (In thousands) Beginning of Period at Reporting Date During Year Settlements, net (1) End of Period Year ended May 31, 2021 $ 27,437 455 - 506 $ 28,398 Year ended May 31, 2020 28,015 (691 ) - 113 27,437 (1) Includes the impact of exchange rate changes during the year.

Postretirement Benefits (Tables

Postretirement Benefits (Tables) - Postretirement Benefits - Unfunded-Health-Care-Benefit Plans	12 Months Ended
	May 31, 2021
Components of Net Periodic Pension and Postretirement Costs	The following table illustrates the effect on operations of these plans for the three years ended May 31, 2021: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2019 2021 2020 2019 Service cost - benefits earned during the period $ - $ - $ - $ 1,959 $ 1,661 $ 1,507 Interest cost on the accumulated obligation 74 149 192 1,286 1,089 1,122 Amortization of: Prior service (credit) (167 ) (219 ) (219 ) - - - Net actuarial (gains) losses 42 (66 ) (26 ) 590 611 442 Net Postretirement Benefit (Income) Cost $ (51 ) $ (136 ) $ (53 ) $ 3,835 $ 3,361 $ 3,071
Changes in Benefit Obligations	The changes in benefit obligations of the plans at May 31, 2021 and 2020 were as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Accumulated postretirement benefit obligation at beginning of year $ 4,182 $ 4,990 $ 38,389 $ 37,663 Service cost - - 1,959 1,661 Interest cost 74 149 1,286 1,089 Benefit payments (1,902 ) (1,659 ) (673 ) (639 ) Actuarial (gains) losses 152 702 (6,415 ) (683 ) Currency exchange rate changes - - 5,428 (702 ) Accumulated and accrued postretirement benefit obligation at end of year $ 2,506 $ 4,182 $ 39,974 $ 38,389
Amounts Recognized in Consolidated Balance Sheet	Amounts recognized in the Consolidated Balance Sheets for the years ended May 31, 2021 and 2020 are as follows: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Current liabilities $ (238 ) $ (385 ) $ (931 ) $ (805 ) Noncurrent liabilities (2,268 ) (3,797 ) (39,043 ) (37,584 ) Net Amount Recognized $ (2,506 ) $ (4,182 ) $ (39,974 ) $ (38,389 )
Pretax Net Actuarial Loss and Prior Service (Costs) Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings	The following table presents the pretax net actuarial (loss) and prior service credits recognized in accumulated other comprehensive income (loss) not affecting retained earnings: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Net actuarial (loss) $ (497 ) $ (386 ) $ (5,901 ) $ (11,331 ) Prior service credits 281 448 - - Total recognized in accumulated other comprehensive income not affecting retained earnings $ (216 ) $ 62 $ (5,901 ) $ (11,331 )
Changes Recognized in Other Comprehensive Income	The following table includes the changes recognized in other comprehensive income: U.S. Plans Non-U.S. Plans (In thousands) 2021 2020 2021 2020 Changes in plan assets and benefit obligations recognized in other comprehensive income: Prior service cost $ - $ - $ - $ - Net loss (gain) arising during the year 152 702 (6,415 ) (683 ) Effect of exchange rates on amounts included in AOCI - - 1,574 (266 ) Amounts recognized as a component of net periodic benefit cost: Amortization or curtailment recognition of prior service credit 167 219 - - Amortization or settlement recognition of net gain (loss) (41 ) 66 (590 ) (611 ) Total recognized in other comprehensive loss (income) $ 278 $ 987 $ (5,431 ) $ (1,560 )
Weighted-Average Assumptions used to Determine Benefit Obligations and Net Periodic and Postretirement Costs	The following weighted-average assumptions were used to determine our year-end benefit obligations and net periodic postretirement benefit costs under the plans: U.S. Plans Non-U.S. Plans Year-End Benefit Obligations 2021 2020 2021 2020 Discount rate 2.47 % 2.44 % 3.51 % 3.32 % Current healthcare cost trend rate 6.07 % 6.68 % 5.68 % 5.73 % Ultimate healthcare cost trend rate 4.36 % 4.36 % 3.70 % 3.70 % Year ultimate healthcare cost trend rate will be realized 2037 2037 2040 2040 U.S. Plans Non-U.S. Plans Net Periodic Postretirement Cost 2021 2020 2019 2021 2020 2019 Discount rate 2.44 % 3.44 % 4.03 % 3.32 % 3.22 % 3.70 % Healthcare cost trend rate 6.68 % 7.29 % 7.86 % 5.73 % 5.77 % 6.02 % Ultimate healthcare cost trend rate 4.36 % 4.36 % 4.36 % 3.70 % 3.70 % 4.20 % Year ultimate healthcare cost trend rate will be realized 2037 2037 2037 2040 2040 2032

Contingencies and Accrued Los_2

Contingencies and Accrued Losses (Tables)	12 Months Ended
Contingencies and Accrued Losses (Tables)	May 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Accrued Loss Reserves	Accrued loss reserves consist of the following: May 31, 2021 2020 (In thousands) Accrued product liability reserves $ 18,296 $ 10,458 Accrued warranty reserves 9,429 7,593 Accrued environmental reserves 1,329 1,970 Total Accrued Loss Reserves - Current $ 29,054 $ 20,021 Accrued product liability reserves - noncurrent $ 26,614 $ 27,016 Accrued warranty liability - noncurrent 3,746 3,513 Accrued environmental reserves - noncurrent 6,267 4,125 Total Accrued Loss Reserves - Noncurrent $ 36,627 $ 34,654
Changes in Accrued Warranty Balances	The following table includes the changes in our accrued warranty balances: Year Ended May 31, 2021 2020 2019 (In thousands) Beginning Balance $ 11,106 $ 10,414 $ 11,721 Deductions (1) (25,817 ) (20,762 ) (22,262 ) Provision charged to expense 27,886 21,454 20,955 Ending Balance $ 13,175 $ 11,106 $ 10,414 (1) Primarily claims paid during the year.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
Revenue (Tables)	May 31, 2021
Revenue From Contract With Customer [Abstract]
Trade Accounts Receivable Net of Allowances and Net Contract Assets (Liabilities)	Trade accounts receivable, net of allowances, and net contract assets (liabilities) consisted of the following: Year Ended May 31, 2021 2020 $ Change % Change (In thousands, except percents) Trade accounts receivable, less allowance $ 1,280,806 $ 1,137,957 $ 142,849 12.6 % Contract assets $ 33,217 $ 25,249 $ 7,968 31.6 % Contract liabilities - short-term (33,112 ) (25,288 ) (7,824 ) 30.9 % Net Contract Assets/(Liabilities) $ 105 $ (39 ) $ 144 -369.2 %
Summary of Activity for Allowance for Credit Losses	The following tables summarize the activity for the allowance for credit losses for the fiscal year ended May 31, 2021: (In thousands) Balance at June 1, 2020 $ 55,847 Bad debt provision 10,044 Uncollectible accounts written off, net of recoveries (14,182 ) Translation adjustments 4,213 Balance at May 31, 2021 $ 55,922

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	May 31, 2021
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. Year Ended May 31, 2021 2020 2019 (In thousands) Net Sales CPG $ 2,076,565 $ 1,880,105 $ 1,899,744 PCG 1,028,456 1,080,701 1,136,119 Consumer 2,295,277 1,945,220 1,858,453 SPG 705,990 600,968 670,235 Total $ 6,106,288 $ 5,506,994 $ 5,564,551 Income (Loss) Before Income Taxes CPG $ 291,773 $ 209,663 $ 178,823 PCG 90,687 102,345 77,388 Consumer 354,789 198,024 217,448 SPG 108,242 57,933 86,018 Corporate/Other (177,053 ) (160,201 ) (219,832 ) Total $ 668,438 $ 407,764 $ 339,845 Identifiable Assets CPG $ 1,815,303 $ 1,622,632 $ 1,573,329 PCG 1,051,334 925,569 951,644 Consumer 2,386,703 2,067,017 1,953,279 SPG 772,540 728,449 689,133 Corporate/Other 227,089 287,287 273,970 Total $ 6,252,969 $ 5,630,954 $ 5,441,355 Capital Expenditures CPG $ 65,830 $ 63,393 $ 40,119 PCG 19,413 23,868 22,158 Consumer 54,986 47,331 45,039 SPG 18,989 21,610 28,006 Corporate/Other 223 1,077 1,435 Total $ 159,441 $ 157,279 $ 136,757 Depreciation and Amortization CPG $ 45,079 $ 46,491 $ 44,150 PCG 22,633 23,850 27,116 Consumer 47,763 56,570 40,231 SPG 26,017 24,111 25,199 Corporate/Other 5,365 5,820 5,046 Total $ 146,857 $ 156,842 $ 141,742
Net Sales and Long Lived Assets by Regions	Year Ended May 31, 2021 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,135,341 $ 611,808 $ 1,832,826 $ 581,094 $ 4,161,069 Foreign Canada 208,289 69,754 153,631 8,982 440,656 Europe 481,244 242,102 257,372 82,170 1,062,888 Latin America 159,197 26,283 31,358 1,826 218,664 Asia Pacific 79,413 22,658 20,090 31,918 154,079 Other Foreign 13,081 55,851 - - 68,932 Total Foreign 941,224 416,648 462,451 124,896 1,945,219 Total $ 2,076,565 $ 1,028,456 $ 2,295,277 $ 705,990 $ 6,106,288 Year Ended May 31, 2020 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,068,552 $ 656,162 $ 1,573,966 $ 489,543 $ 3,788,223 Foreign Canada 159,986 71,689 116,424 8,354 356,453 Europe 418,249 247,904 195,783 74,162 936,098 Latin America 151,099 32,471 24,909 1,328 209,807 Asia Pacific 73,629 24,622 26,432 27,581 152,264 Other Foreign 8,590 47,853 7,706 - 64,149 Total Foreign 811,553 424,539 371,254 111,425 1,718,771 Total $ 1,880,105 $ 1,080,701 $ 1,945,220 $ 600,968 $ 5,506,994 Year Ended May 31, 2019 CPG Segment PCG Segment Consumer Segment SPG Segment Consolidated (In thousands) Net Sales (based on shipping location) (a) United States $ 1,003,227 $ 667,402 $ 1,462,446 $ 543,429 $ 3,676,504 Foreign Canada 181,089 82,897 117,305 8,908 390,199 Europe 477,761 251,600 213,466 86,197 1,029,024 Latin America 155,039 34,588 28,020 1,397 219,044 Asia Pacific 81,895 36,498 29,171 30,304 177,868 Other Foreign 733 63,134 8,045 - 71,912 Total Foreign 896,517 468,717 396,007 126,806 1,888,047 Total $ 1,899,744 $ 1,136,119 $ 1,858,453 $ 670,235 $ 5,564,551 Year Ended May 31, 2021 2020 2019 (In thousands) Long-Lived Assets (b) United States $ 2,325,365 $ 2,146,333 $ 1,859,628 Foreign Canada 235,810 224,177 242,582 Europe 394,168 358,511 343,501 United Kingdom 290,078 252,185 217,414 Other Foreign 198,740 195,425 225,230 Total Foreign 1,118,796 1,030,298 1,028,727 Total $ 3,444,161 $ 3,176,631 $ 2,888,355 (a) It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines. (b) Long-lived assets include all non-current assets, excluding non-current deferred income taxes.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	2 Months Ended	12 Months Ended
	Jul. 23, 2021USD ($)$ / sharesshares	May 31, 2021USD ($)EntitySegment$ / sharesshares	May 31, 2020USD ($)EntitySegmentReportingUnit$ / sharesshares	May 31, 2019USD ($)Segment$ / sharesshares
Significant Of Accounting Policies [Line Items]
Percentage of controlled subsidiary's earnings		100.00%
Number of business acquisition \| Entity		4	3
Number of reportable segments \| Segment		4	4
Net transactional foreign exchange losses gains		$ (2,800,000)	$ 300,000	$ (4,800,000)
Depreciation		99,400,000	108,500,000	94,000,000
Bad debt expense		10,044,000	16,700,000	18,600,000
Inventory write-downs		$ 3,700,000	39,600,000	29,400,000
Number of operating segments \| Segment		4
Goodwill impairments		$ 0	0	0
Impairment charge of intangible assets				4,200,000
Impairment charge of indefinite lived intangible assets		0
Advertising cost		61,100,000	49,700,000	57,500,000
Research and development cost		$ 77,600,000	$ 76,500,000	$ 71,600,000
Shares repurchased \| shares		594,061	2,041,847	3,286,907
Shares repurchased, value		$ 49,956,000	$ 125,000,000	$ 200,222,000
Repurchase of common stock price per shares \| $ / shares		$ 84.09	$ 61.22	$ 60.92
Subsequent Event
Significant Of Accounting Policies [Line Items]
Shares repurchased \| shares	133,388
Shares repurchased, value	$ 12,500,000
Repurchase of common stock price per shares \| $ / shares	$ 93.71
ASU 2016-13
Significant Of Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jun. 1, 2020
ASU 2017-04
Significant Of Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jun. 1, 2020
ASU 2018-13
Significant Of Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
Change in accounting principle, accounting standards update, adoption date		Jun. 1, 2020
ASU 2018-14
Significant Of Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]		true
Change in accounting principle, accounting standards update, immaterial effect [true false]		true
Consumer Segment
Significant Of Accounting Policies [Line Items]
Inventory write-downs			$ 28,800,000	$ 10,500,000
Impairment loss of indefinite lived intangible assets on annual impairment tests			0	0
Impairment charge of indefinite lived intangible assets			4,000,000
PCG Segment
Significant Of Accounting Policies [Line Items]
Inventory write-downs			$ 3,200,000	9,000,000
CPG Segment
Significant Of Accounting Policies [Line Items]
Inventory write-downs				1,000,000
Impairment charge of indefinite lived intangible assets				$ 2,000,000
Industrial Segment
Significant Of Accounting Policies [Line Items]
Number of operating segments \| Segment				2
Wood Finishes Group
Significant Of Accounting Policies [Line Items]
Number of reporting units \| ReportingUnit			2
Kop-Coat Group
Significant Of Accounting Policies [Line Items]
Number of reporting units \| ReportingUnit			2
SPG reportable segment
Significant Of Accounting Policies [Line Items]
Impairment charge of definite lived intangible assets				$ 2,200,000

Assets Acquired and Liabilities

Assets Acquired and Liabilities Assumed on Acquisition (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Acquisitions
Goodwill		$ 1,345,754	$ 1,250,066	$ 1,245,762
Weighted-average other intangible asset amortization life (in years)		20 years	16 years
2021 Acquisitions
Acquisitions
Current assets		$ 50,310
Property, plant and equipment		27,012
Goodwill		41,654
Trade names - indefinite lives		16,694
Other intangible assets		53,894
Other long-term assets		6,831
Total Assets Acquired		196,395
Liabilities assumed		(24,232)
Net Assets Acquired	[1]	$ 172,163
2020 Acquisitions
Acquisitions
Current assets			$ 10,649
Property, plant and equipment			1,694
Goodwill			28,291
Trade names - indefinite lives			1,555
Other intangible assets			31,046
Other long-term assets			56
Total Assets Acquired			73,291
Liabilities assumed			(7,135)
Net Assets Acquired	[2]		$ 66,156

[1]	Figure includes cash acquired of $6.4 million.
[2]	Figure includes cash acquired of $1.6 million.

Assets Acquired and Liabiliti_2

Assets Acquired and Liabilities Assumed on Acquisition (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020
Business Combinations [Abstract]
Business acquisition cash acquired	$ 6.4	$ 1.6

Property, Plant and Equipment (

Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, at cost	$ 1,967,482	$ 1,755,190
Less: allowance for depreciation and amortization	1,002,300	905,504
Property, plant and equipment, net	965,182	849,686
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, at cost	93,455	85,860
Building And Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, at cost	518,205	469,483
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, at cost	$ 1,355,822	$ 1,199,847

Useful Lives (Detail)

Useful Lives (Detail)	12 Months Ended
Useful Lives (Detail)	May 31, 2021
Building And Leasehold Improvements \| Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property Plant and equipment useful life	1 year
Building And Leasehold Improvements \| Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property Plant and equipment useful life	50 years
Machinery and Equipment \| Minimum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property Plant and equipment useful life	1 year
Machinery and Equipment \| Maximum
Property Plant and Equipment Estimated Useful Lives [Line Items]
Property Plant and equipment useful life	40 years

Major Class of Inventory (Detai

Major Class of Inventory (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Inventory Disclosure [Abstract]
Raw materials and supplies	$ 447,220	$ 282,579
Finished goods	490,875	527,869
Total Inventory	$ 938,095	$ 810,448

Investment (Income), Net (Detai

Investment (Income), Net (Detail) - USD ($) $ in Thousands	12 Months Ended
Investment (Income), Net (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020	May 31, 2019
Investment Income Net [Abstract]
Interest (income)	$ (3,555)	$ (5,313)	$ (4,885)
Net (gain) loss on marketable securities	(38,774)	(1,629)	8,366
Dividend (income)	(2,121)	(2,797)	(4,211)
Investment (income), net	$ (44,450)	$ (9,739)	$ (730)

Net (Gain) Loss on Marketable S

Net (Gain) Loss on Marketable Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Net Loss (Gain) on Marketable Securities
Unrealized (gains) losses on marketable equity securities	$ (16,133)	$ (1,457)	$ 5,827
Realized (gains) losses on marketable equity securities	(22,680)	(237)	2,322
Realized losses on available-for-sale debt securities	39	65	217
Net (gain) loss on marketable securities	$ (38,774)	$ (1,629)	$ 8,366

Other Expense, Net (Detail)

Other Expense, Net (Detail) - USD ($) $ in Thousands		12 Months Ended
Other Expense, Net (Detail) - USD ($) $ in Thousands		May 31, 2021	May 31, 2020	May 31, 2019
Other Income And Expenses [Abstract]
Royalty expense (income), net	[1]	$ (387)	$ 5,206	$ (96)
(Income) related to unconsolidated equity affiliates		(516)	(165)	(332)
Pension non-service costs		14,542	6,076	1,647
Loss on extinguishment of debt	[2]			3,051
Loss on divestiture	[3]		949
Other expense, net		$ 13,639	$ 12,066	$ 4,270

[1]	Includes a $5.3 million charge incurred during the fourth quarter of fiscal 2020 related to the termination of a licensing agreement within our Consumer reportable segment.
[2]	In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion
[3]	Reflects the loss incurred upon divestiture of a contracting business located in Australia, which had reported through our PCG segment.

Other Expense, Net (Parenthetic

Other Expense, Net (Parenthetical) (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	12 Months Ended
		Nov. 30, 2018	May 31, 2020	May 31, 2019	Nov. 27, 2018
Other Income And Expenses [Line Items]
Terminated license agreement charge			$ 5,300
Loss on extinguishment of debt	[1]			$ 3,051
2.25% Convertible Senior Notes
Other Income And Expenses [Line Items]
Debt, interest rate		2.25%			2.25%
Debt instrument redemption period		2018-11
Loss on extinguishment of debt		$ 3,100

[1]	In connection with the redemption of all of our outstanding 2.25% convertible senior notes in November 2018, we recognized a loss of $3.1 million, due to the fair value remeasurement on the date of conversion

Restructuring - Additional Info

Restructuring - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Inventory-related charges	$ 3.7	$ 39.6	$ 29.4
Consumer Segment
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		28.8	10.5
CPG Segment
Restructuring Cost And Reserve [Line Items]
Inventory-related charges			1
PCG Segment
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		3.2	9
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	5.2
MAP to Growth \| Consumer Segment \| Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges	1.5	16.3	2.1
Inventory-related charges, favorable adjustment			0.2
MAP to Growth \| CPG Segment \| Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges	0.1	0.7	1
MAP to Growth \| PCG Segment \| Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		3.2	$ 9
MAP to Growth \| SPG Segments \| Cost of Sales
Restructuring Cost And Reserve [Line Items]
Inventory-related charges		$ 0.1
MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	2.6
MAP to Growth \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Increase in current total expected costs	$ 2.6

Summary of Charges Recorded in

Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Current Year Charges	$ 18,106	$ 33,108	$ 42,310
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Current Year Charges	18,106	33,108	42,310
Cumulative Costs to Date	111,035
Total Expected Costs	118,374
MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	9,396	19,747	32,519
Cumulative Costs to Date	71,619
Total Expected Costs	73,783
MAP to Growth \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	7,956	8,548	8,195
Cumulative Costs to Date	30,880
Total Expected Costs	36,055
MAP to Growth \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	754	4,813	1,596
Cumulative Costs to Date	8,536
Total Expected Costs	8,536
MAP to Growth \| Construction Products Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	5,335	8,726	11,598
Cumulative Costs to Date	29,846
Total Expected Costs	31,348
MAP to Growth \| Construction Products Segment \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,194	6,866	9,459
Cumulative Costs to Date	21,288
Total Expected Costs	21,534
MAP to Growth \| Construction Products Segment \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,103	1,508	1,924
Cumulative Costs to Date	6,580
Total Expected Costs	7,836
MAP to Growth \| Construction Products Segment \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	38	352	215
Cumulative Costs to Date	1,978
Total Expected Costs	1,978
MAP to Growth \| Performance Coatings Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	4,572	9,094	9,839
Cumulative Costs to Date	23,905
Total Expected Costs	25,552
MAP to Growth \| Performance Coatings Segment \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,974	6,973	6,012
Cumulative Costs to Date	16,359
Total Expected Costs	16,900
MAP to Growth \| Performance Coatings Segment \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,282	1,873	3,474
Cumulative Costs to Date	6,629
Total Expected Costs	7,735
MAP to Growth \| Performance Coatings Segment \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	316	248	353
Cumulative Costs to Date	917
Total Expected Costs	917
MAP to Growth \| Consumer Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	5,288	9,428	3,304
Cumulative Costs to Date	28,808
Total Expected Costs	30,751
MAP to Growth \| Consumer Segment \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,840	3,089	1,726
Cumulative Costs to Date	12,307
Total Expected Costs	12,307
MAP to Growth \| Consumer Segment \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	3,147	2,245	1,553
Cumulative Costs to Date	12,081
Total Expected Costs	14,024
MAP to Growth \| Consumer Segment \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	301	4,094	25
Cumulative Costs to Date	4,420
Total Expected Costs	4,420
MAP to Growth \| SPG Segments
Restructuring Cost And Reserve [Line Items]
Current Year Charges	2,720	4,633	7,585
Cumulative Costs to Date	14,938
Total Expected Costs	17,185
MAP to Growth \| SPG Segments \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,197	1,592	5,338
Cumulative Costs to Date	8,127
Total Expected Costs	9,504
MAP to Growth \| SPG Segments \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	1,424	2,922	1,244
Cumulative Costs to Date	5,590
Total Expected Costs	6,460
MAP to Growth \| SPG Segments \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	99	119	1,003
Cumulative Costs to Date	1,221
Total Expected Costs	1,221
MAP to Growth \| Corporate/Other Segment
Restructuring Cost And Reserve [Line Items]
Current Year Charges	191	1,227	9,984
Cumulative Costs to Date	13,538
Total Expected Costs	13,538
MAP to Growth \| Corporate/Other Segment \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Current Year Charges	191	$ 1,227	$ 9,984
Cumulative Costs to Date	13,538
Total Expected Costs	$ 13,538

Summary of Charges Recorded i_2

Summary of Charges Recorded in Connection with Restructuring by Reportable Segment (Parenthetical) (Detail) $ in Thousands	12 Months Ended
	May 31, 2021USD ($)Position	May 31, 2020USD ($)Position	May 31, 2019USD ($)PositionExecutive
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 18,106	$ 33,108	$ 42,310
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	18,106	33,108	42,310
MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Restructuring charges	9,396	19,747	32,519
Construction Products Segment \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 5,335	$ 8,726	$ 11,598
Construction Products Segment \| MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position	34	112	109
Restructuring charges	$ 3,194	$ 6,866	$ 9,459
Construction Products Segment \| MAP to Growth Plan Related to Legal Function
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position			1
Restructuring charges			$ 200
Performance Coatings Segment \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 4,572	$ 9,094	$ 9,839
Performance Coatings Segment \| MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position	71	161	114
Restructuring charges	$ 2,974	$ 6,973	$ 6,012
SPG Segments \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 2,720	$ 4,633	$ 7,585
Number of corporate executives \| Executive			4
SPG Segments \| MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position	35	94	130
Restructuring charges	$ 1,197	$ 1,592	$ 5,338
Corporate/Other Segment \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	191	$ 1,227	9,984
Corporate/Other Segment \| MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position		2
Restructuring charges	191	$ 1,227	$ 9,984
Number of corporate executives \| Executive			2
Corporate/Other Segment \| MAP to Growth \| Vesting Equity Awards
Restructuring Cost And Reserve [Line Items]
Number of corporate executives \| Executive			2
Consumer Segment \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 5,288	$ 9,428	$ 3,304
Consumer Segment \| MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated \| Position	29	92	21
Restructuring charges	$ 1,840	$ 3,089	$ 1,726
CPG Segment \| MAP to Growth
Restructuring Cost And Reserve [Line Items]
Number of corporate executives \| Executive			3

Summary of Activity in Restruct

Summary of Activity in Restructuring Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	$ 18,106	$ 33,108	$ 42,310
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Beginning balance	13,237	12,694
Additions charged to expense	18,106	33,108	42,310
Cash payments charged against reserve	(21,016)	(26,277)
Non-cash charges and other adjustments	(4,607)	(6,288)
Ending balance	5,720	13,237	12,694
MAP to Growth \| Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	7,357	4,837
Additions charged to expense	9,396	19,747	32,519
Cash payments charged against reserve	(12,413)	(17,038)
Non-cash charges and other adjustments	90	(189)
Ending balance	4,430	7,357	4,837
MAP to Growth \| Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	5,880	7,857
Additions charged to expense	7,956	8,548	8,195
Cash payments charged against reserve	(8,268)	(9,239)
Non-cash charges and other adjustments	(4,278)	(1,286)
Ending balance	1,290	5,880	7,857
MAP to Growth \| Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	754	4,813	$ 1,596
Cash payments charged against reserve	(335)
Non-cash charges and other adjustments	$ (419)	$ (4,813)

Changes in Carrying Amount of G

Changes in Carrying Amount of Goodwill, by Reportable Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021		May 31, 2020
Goodwill [Line Items]
Goodwill beginning balance	$ 1,250,066		$ 1,245,762
Acquisitions	40,729		28,064
Translation adjustments & other	54,959	[1]	(23,760)
Goodwill ending balance	1,345,754		1,250,066
CPG Segment
Goodwill [Line Items]
Goodwill beginning balance	405,354		407,429
Acquisitions	2,295		14,689
Translation adjustments & other	35,866	[1]	(16,764)
Goodwill ending balance	443,515		405,354
PCG Segment
Goodwill [Line Items]
Goodwill beginning balance	185,404		185,259
Acquisitions	16,174		3,023
Translation adjustments & other	5,460	[1]	(2,878)
Goodwill ending balance	207,038		185,404
Consumer Segment
Goodwill [Line Items]
Goodwill beginning balance	496,218		499,387
Acquisitions	20,126
Translation adjustments & other	8,886	[1]	(3,169)
Goodwill ending balance	525,230		496,218
SPG Segments
Goodwill [Line Items]
Goodwill beginning balance	163,090		153,687
Acquisitions	2,134		10,352
Translation adjustments & other	4,747	[1]	(949)
Goodwill ending balance	$ 169,971		$ 163,090

[1]	Activity includes a $2.3 million decrease to goodwill within our Consumer segment related to adjustments to preliminary purchase price allocations, primarily due to deferred tax adjustments.

Changes in Carrying Amount of_2

Changes in Carrying Amount of Goodwill, by Reportable Segment (Parenthetical) (Detail) $ in Millions	12 Months Ended
	May 31, 2021USD ($)
Consumer Segment
Goodwill [Line Items]
Adjustments to preliminary purchase price allocations	$ 2.3

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019	May 31, 2017	May 31, 2009
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses	$ 156,300,000
Impairment losses	0	$ 0	$ 0
Intangible asset amortization expense	44,300,000	45,600,000	45,100,000
Future amortization expense of intangible asset in 2022	44,300,000
Future amortization expense of intangible asset in 2023	40,800,000
Future amortization expense of intangible asset in 2024	37,800,000
Future amortization expense of intangible asset in 2025	33,000,000
Future amortization expense of intangible asset in 2026	28,900,000
Impairment charge of indefinite lived intangible assets	$ 0
Impairment charge of intangible assets			4,200,000
SPG Segments
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses				$ 141,400,000
Impairment charge of definite lived intangible assets			2,200,000
SPG Segments \| Customer-related Intangibles
Goodwill And Intangible Assets [Line Items]
Impairment charge of definite lived intangible assets			2,200,000
CPG Segment
Goodwill And Intangible Assets [Line Items]
Accumulated goodwill impairment losses					$ 14,900,000
Impairment charge of indefinite lived intangible assets			2,000,000
CPG Segment \| Trade names
Goodwill And Intangible Assets [Line Items]
Impairment charge of indefinite lived intangible assets			$ 2,000,000
Consumer Segment
Goodwill And Intangible Assets [Line Items]
Impairment charge of indefinite lived intangible assets		4,000,000
Consumer Segment \| Trade names \| Restructuring Expense
Goodwill And Intangible Assets [Line Items]
Impairment charge of indefinite lived intangible assets		$ 4,000,000

Other Intangible Assets Major C

Other Intangible Assets Major Classes (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, gross carrying amount	$ 808,159	$ 732,698
Amortized intangible assets, accumulated amortization	(452,767)	(399,028)
Amortized intangible assets, net other intangible assets	355,392	333,670
Total Other Intangible Assets, gross carrying amount	1,081,460	983,408
Total Other Intangible Assets, net other intangible assets	628,693	584,380
Trademarks and Trade Names
Intangible Assets by Major Class [Line Items]
Indefinite-lived intangible assets, acquisitions	273,301	250,710
Indefinite-lived intangible assets, net other intangible assets	273,301	250,710
Formulae
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, gross carrying amount	234,037	230,621
Amortized intangible assets, accumulated amortization	(172,989)	(160,771)
Amortized intangible assets, net other intangible assets	$ 61,048	$ 69,850
Formulae \| Minimum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	9 years	9 years
Formulae \| Maximum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	33 years	33 years
Customer-Related Intangible Assets
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, gross carrying amount	$ 505,710	$ 439,153
Amortized intangible assets, accumulated amortization	(233,496)	(197,752)
Amortized intangible assets, net other intangible assets	$ 272,214	$ 241,401
Customer-Related Intangible Assets \| Minimum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	5 years	5 years
Customer-Related Intangible Assets \| Maximum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	33 years	33 years
Trademarks and Trade Names
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, gross carrying amount	$ 34,326	$ 30,700
Amortized intangible assets, accumulated amortization	(20,575)	(17,224)
Amortized intangible assets, net other intangible assets	$ 13,751	$ 13,476
Trademarks and Trade Names \| Minimum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	5 years	5 years
Trademarks and Trade Names \| Maximum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	40 years	40 years
Other Intangible Assets
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, gross carrying amount	$ 34,086	$ 32,224
Amortized intangible assets, accumulated amortization	(25,707)	(23,281)
Amortized intangible assets, net other intangible assets	$ 8,379	$ 8,943
Other Intangible Assets \| Minimum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	5 years	1 year
Other Intangible Assets \| Maximum
Intangible Assets by Major Class [Line Items]
Amortized intangible assets, amortization period	33 years	33 years

Summary of Available-for-Sale D

Summary of Available-for-Sale Debt Securities by Asset Type (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Debt Securities, Amortized Cost	$ 26,297	$ 25,605
Available-for-Sale Debt Securities, Gross Unrealized Gains	632	1,357
Available-for-Sale Debt Securities, Gross Unrealized Losses	(184)	(40)
Available-for-Sale Debt Securities, Fair Value (Net Carrying Amount)	26,745	26,922
U.S. Treasury and other government
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Debt Securities, Amortized Cost	26,154	25,462
Available-for-Sale Debt Securities, Gross Unrealized Gains	593	1,314
Available-for-Sale Debt Securities, Gross Unrealized Losses	(184)	(40)
Available-for-Sale Debt Securities, Fair Value (Net Carrying Amount)	26,563	26,736
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-Sale Debt Securities, Amortized Cost	143	143
Available-for-Sale Debt Securities, Gross Unrealized Gains	39	43
Available-for-Sale Debt Securities, Fair Value (Net Carrying Amount)	$ 182	$ 186

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - USD ($) $ in Millions	May 31, 2021	May 31, 2020
Investments Debt And Equity Securities [Abstract]
Available-for-sale debt securities, current	$ 3.9	$ 7.6
Available-for-sale debt securities, long-term	22.8	19.3
Equity securities	$ 142.1	$ 87.1

Summary of Available-for-Sale_2

Summary of Available-for-Sale Debt Securities in Unrealized Loss Position and Included in Accumulated Other Comprehensive (Loss), Aggregated by Length of Time Investments (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Investments Debt And Equity Securities [Abstract]
Total investments with unrealized losses, fair value	$ 8,420	$ 2,028
Unrealized losses with a loss position for less than 12 months, fair value	6,920
Unrealized losses with a loss position for more than 12 months, fair value	1,500	2,028
Total investments with unrealized losses, gross unrealized losses	(184)	(40)
Unrealized losses with a loss position for less than 12 months, gross unrealized losses	(152)
Unrealized losses with a loss position for more than 12 months, gross unrealized losses	$ (32)	$ (40)

Net Carrying Values of Debt Sec

Net Carrying Values of Debt Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Available-for-Sale Debt Securities, Amortized Cost
Less than one year, amortized cost	$ 3,892
One year through five years, amortized cost	14,591
Six years through ten years, amortized cost	5,221
After ten years, amortized cost	2,593
Available-for-Sale Debt Securities, Amortized Cost	26,297	$ 25,605
Available-for-Sale Debt Securities, Fair Value
Less than one year, fair value	3,890
One year through five years, fair value	14,964
Six years through ten years, fair value	5,318
After ten years, fair value	2,573
Available-for-sale debt securities, fair value	$ 26,745	$ 26,922

Assets and Liabilities Measured

Assets and Liabilities Measured at Fair Value on Recurring Basis and Categorized using Fair Value Hierarchy (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020	May 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$ 26,745	$ 26,922
Total marketable equity securities	142,100	87,100
U.S. Treasury and other government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	26,563	26,736
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities	$ 182	186
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities		26,745	$ 26,922
Total marketable equity securities		142,087	96,221
Assets (liabilities) at fair value		155,497	107,461
Fair Value, Measurements, Recurring \| U.S. Treasury and other government
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities		26,563	26,736
Fair Value, Measurements, Recurring \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities		182	186
Fair Value, Measurements, Recurring \| Stocks \| Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		768
Fair Value, Measurements, Recurring \| Stocks \| Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		6,975	3,870
Fair Value, Measurements, Recurring \| Mutual funds \| Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		47,916	28,815
Fair Value, Measurements, Recurring \| Mutual funds \| Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		86,428	63,536
Fair Value, Measurements, Recurring \| Contingent consideration liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration		(13,335)	(15,682)
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		7,743	3,870
Assets (liabilities) at fair value		7,743	3,870
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Stocks \| Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		768
Fair Value, Measurements, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Stocks \| Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		6,975	3,870
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities		26,745	26,922
Total marketable equity securities		134,344	92,351
Assets (liabilities) at fair value		161,089	119,273
Fair Value, Measurements, Recurring \| 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]
Total available-for-sale securities		26,563	26,736
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total available-for-sale securities		182	186
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Mutual funds \| Foreign
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		47,916	28,815
Fair Value, Measurements, Recurring \| Significant Other Observable Inputs (Level 2) \| Mutual funds \| Domestic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total marketable equity securities		86,428	63,536
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets (liabilities) at fair value		(13,335)	(15,682)
Fair Value, Measurements, Recurring \| Significant Unobservable Inputs (Level 3) \| Contingent consideration liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration		$ (13,335)	$ (15,682)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020
Fair Value Disclosures [Abstract]
Settlements of contingent consideration obligations	$ 2.8	$ 6.4

Fair Value and Carrying Value o

Fair Value and Carrying Value of Financial Instruments and Long-Term Debt (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	$ 142,100	$ 87,100
Total available-for-sale securities	26,745	26,922
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	246,704	233,416
Equity securities	142,087	87,111
Total available-for-sale securities	26,745	26,922
Long-term debt, including current portion	2,379,826	2,539,180
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	246,704	233,416
Equity securities	142,087	87,111
Total available-for-sale securities	26,745	26,922
Long-term debt, including current portion	$ 2,570,206	$ 2,618,719

Derivatives and Hedging - Addit

Derivatives and Hedging - Additional Information (Detail)	Oct. 31, 2017USD ($)CrossCurrencySwap	Feb. 29, 2020USD ($)CrossCurrencySwap	May 31, 2021USD ($)ForwardContract	May 31, 2020USD ($)ForwardContract	Feb. 29, 2020EUR (€)CrossCurrencySwap	Oct. 31, 2017EUR (€)CrossCurrencySwap
Derivatives Designated as Hedging Instruments
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
Number of cross currency swaps terminated \| CrossCurrencySwap		2			2
Cash received on derivative fair value hedge \| $		$ 9,300,000
Discontinuation of price risk cash flow hedge			hedge accounting was discontinued and a hedge accounting adjustment to our Senior Notes of $1.5 million was recorded and is being amortized to interest expense in the Consolidated Statements of Operations through the termination of the 3.450% Notes in November 2022. Changes in the fair value of the cross currency swaps due to spot foreign exchange rates are recorded as cumulative translation adjustment within AOCI and will remain in AOCI until either the sale or substantially complete liquidation of the hedged subsidiaries
Derivatives Designated as Hedging Instruments \| Variable Interest Rate
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of cross currency swaps executed \| CrossCurrencySwap		2			2
Notional amount		$ 300,000,000			€ 277,730,000
Derivative instruments maturity date		2023-02
Derivatives Designated as Hedging Instruments \| Foreign Borrower's Term Loan \| Variable Interest Rate
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount		$ 100,000,000			€ 92,520,000
Derivative instruments maturity date		2023-02
Derivatives Designated as Hedging Instruments \| 3.450% Senior Notes November 2022
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Debt instrument, interest rate, stated percentage		3.45%			3.45%
Derivatives Designated as Hedging Instruments \| 3.450% Senior Notes November 2022 \| Interest Expense
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Discontinued hedge accounting adjustment to senior Notes \| $		$ 1,500,000
Derivatives Not Designated as Hedges
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Number of foreign currency forward contract held \| ForwardContract			1	1
Derivatives Not Designated as Hedges \| Forward Contracts Held to Purchase Foreign Currencies
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Notional amount \| $			$ 191,700,000	$ 63,200,000

Derivatives and Hedging - Sched

Derivatives and Hedging - Schedule of Derivatives Instruments for Gains or Losses Initially Recognized in AOCI in Consolidated Balance Sheet (Detail) - Derivatives Designated as Hedging Instruments - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ (41,813)	$ (8,386)	$ 4,998
Pretax gain/(loss) reclassified from AOCI into income	(12,616)	(1,930)
Interest Rate Swap \| Interest (Expense) Income \| Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	(1,226)	(7,998)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	$ (3,380)	170
Income Statement Location	Interest (Expense) Income
Cross Currency Swap \| Interest Income \| Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ (9,207)	(2,254)
Pretax gain/(loss) reclassified from AOCI into income, cash flow	$ 638	554
Income Statement Location	Interest Income
Cross Currency Swap \| Foreign Exchange (Loss) \| Cash Flow
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) reclassified from AOCI into income, cash flow	$ (9,874)	(2,654)
Income Statement Location	Foreign Exchange (Loss)
Cross Currency Swap \| Gain or (loss) on sale of subsidiary \| Net Investment
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Pretax gain/(loss) recognized in AOCI	$ (31,380)	$ 1,866	$ 4,998
Income Statement Location	Gain or (loss) on sale of subsidiary

Derivatives and Hedging - Sch_2

Derivatives and Hedging - Schedule of Fair Values of Qualifying and Non-Qualifying Instruments Used in Hedging Transactions (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
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	$ 6,233	$ 5,352
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		12,409
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	39,228	18,204
Derivatives Designated as Hedging Instruments \| Cross Currency Swap \| Net Investment \| Other Accrued Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	1,321	294
Derivatives Designated as Hedging Instruments \| Cross Currency Swap \| Cash Flow \| Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives assets	516	750
Derivatives Designated as Hedging Instruments \| Cross Currency Swap \| Cash Flow \| Other Long-Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	13,786	3,608
Derivatives Designated as Hedging Instruments \| Interest Rate Swap \| Cash Flow \| Other Long-Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	2,467	5,187
Derivatives Designated as Hedging Instruments \| Interest Rate Swap \| Cash Flow \| Other Accrued Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Fair value of derivatives liabilities	3,547	2,981
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	$ 212
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		$ 53

Description of Long Term Debt (

Description of Long Term Debt (Detail) - USD ($) $ in Thousands		May 31, 2021	May 31, 2020
Debt Instrument [Line Items]
Long-term debt including finance lease		$ 2,379,826	$ 2,539,180
Less: current portion		1,282	80,890
Long-term debt, less current maturities		2,378,544	2,458,290
Revolving Credit Facility
Debt Instrument [Line Items]
Debt	[1]	336,996	419,317
Accounts Receivable Securitization Program with Two Banks, through May 21, 2024
Debt Instrument [Line Items]
Debt	[2]		79,756
Unsecured 3.45% senior notes due November 15, 2022
Debt Instrument [Line Items]
Debt	[3]	300,387	300,615
Unsecured $100M Term Loan due February 21, 2023
Debt Instrument [Line Items]
Debt	[4]	99,880	99,810
Unsecured $300M Term Loan due February 21, 2023
Debt Instrument [Line Items]
Debt	[4]	299,640	299,431
Unsecured 3.75% notes due March 15, 2027
Debt Instrument [Line Items]
Debt	[5]	397,527	397,058
Unsecured 4.55% senior notes due March 1, 2029
Debt Instrument [Line Items]
Debt	[6]	346,904	346,514
Unsecured 5.25% notes due June 1, 2045
Debt Instrument [Line Items]
Debt	[7]	298,745	298,668
Unsecured 4.25% notes due January 15, 2048
Debt Instrument [Line Items]
Debt	[8]	296,714	296,590
Other Borrowings
Debt Instrument [Line Items]
Long-term debt including finance lease		$ 3,033	$ 1,421

[1]	Interest at May 31, 2021 was tied to LIBOR and averaged 1.4609% for USD denominated debt ($37.7 million), 1.3950% for AUD denominated debt ($44.0 million) and 1.3750% on EUR denominated debt ($257.9 million). Interest at May 31, 2020 was tied to LIBOR and averaged 1.5505% for USD denominated debt ($218.3 million), 1.4650% for AUD denominated debt ($37.2 million) and 1.3750% on EUR denominated debt ($167.5 million). At May 31, 2021 and 2020, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $3.7 million, respectively.
[2]	At May 31, 2020, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.2 million, respectively.
[3]	The $300.0 million face amount of the notes due 2022 is adjusted for the amortization of the original issue discount and mark-to-market derivative asset of approximated $0.1 million and ($0.8 million) at May 31, 2021 and approximated $0.1 million and ($1.3 million) at May 31, 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.465%. At May 31, 2021 and 2020, the notes are reduced by debt issuance costs, net of amortization, for approximately $0.4 million and $0.6 million, respectively.
[4]	At May 31, 2021 and 2020, the Term Loan is adjusted for deferred financing fees, net of amortization, of approximately $0.5 million and $0.8 million, respectively.
[5]	The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.3 million and $2.6 million, respectively.
[6]	The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.4 million and $0.5 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568%
[7]	The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.4 million at May 31, 2021 and 2020. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.9 million at May 31, 2021 and 2020. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $2.9 million, respectively.
[8]	The $ 300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $ 3.3 million and $ 3.4 million at May 31, 2021 and 2020, respectively. The effective interest rate on the notes is 4.25 %.

Description of Long Term Debt_2

Description of Long Term Debt (Parenthetical) (Detail) - USD ($) $ in Millions		12 Months Ended
		May 31, 2021		May 31, 2020		Feb. 27, 2019	Dec. 20, 2017	Mar. 31, 2017	Mar. 02, 2017	May 29, 2015	Oct. 23, 2012
Revolving Credit Facility
Debt Instrument [Line Items]
Debt, due date	[1]	Oct. 31, 2023		Oct. 31, 2023
Debt issuance costs, net of amortization		$ 2.6		$ 3.7
Unsecured $100M Term Loan due February 21, 2023
Debt Instrument [Line Items]
Debt	[2]	$ 100		$ 100
Debt, due date	[2]	Feb. 21, 2023		Feb. 21, 2023
Unsecured $300M Term Loan due February 21, 2023
Debt Instrument [Line Items]
Debt	[2]	$ 300		$ 300
Debt, due date	[2]	Feb. 21, 2023		Feb. 21, 2023
Unsecured 3.45% senior notes due November 15, 2022
Debt Instrument [Line Items]
Debt		$ 300		$ 300							$ 300
Debt, interest rate		3.45%	[3]	3.45%	[3]						3.45%
Debt, due date	[3]	Nov. 15, 2022		Nov. 15, 2022
Debt issuance costs, net of amortization		$ 0.4		$ 0.6
Amortization of debt discount premium		$ 0.1		$ 0.1
Debt instrument, effective interest rate		3.465%		3.465%
Mark-to-market derivative asset		$ 0.8		$ 1.3
Unsecured 3.75% notes due March 15, 2027
Debt Instrument [Line Items]
Debt		$ 400		$ 400					$ 400
Debt, interest rate		3.75%	[4]	3.75%	[4]				3.75%
Debt, due date	[4]	Mar. 15, 2027		Mar. 15, 2027
Debt issuance costs, net of amortization		$ 2.3		$ 2.6
Amortization of debt discount premium		$ 0.2		$ 0.3
Debt instrument, effective interest rate		3.767%		3.767%
Unsecured 4.55% senior notes due March 1, 2029
Debt Instrument [Line Items]
Debt		$ 350		$ 350		$ 350
Debt, interest rate		4.55%	[5]	4.55%	[5]	4.55%
Debt, due date	[5]	Mar. 1, 2029		Mar. 1, 2029
Debt issuance costs, net of amortization		$ 2.7		$ 3
Amortization of debt discount premium		$ 0.4		$ 0.5
Debt instrument, effective interest rate		4.568%		4.568%
Unsecured 5.25% notes due June 1, 2045
Debt Instrument [Line Items]
Debt									$ 50	$ 250
Debt, interest rate		5.25%	[6]	5.25%	[6]				5.25%	5.25%
Debt, due date	[6]	Jun. 1, 2045		Jun. 1, 2045
Debt issuance costs, net of amortization		$ 2.8		$ 2.9
Amortization of debt discount premium		$ 1.4		$ 1.4
Debt instrument, effective interest rate		5.29%		5.29%
Accounts Receivable Securitization Program with Two Banks, through May 21, 2024
Debt Instrument [Line Items]
Debt, due date	[7]			May 21, 2024
Debt issuance costs, net of amortization				$ 0.2
Other Borrowings
Debt Instrument [Line Items]
Debt, maturity year		2027		2027
Unsecured 4.25% notes due January 15, 2048
Debt Instrument [Line Items]
Debt		$ 300		$ 300			$ 300
Debt, interest rate		4.25%	[8]	4.25%	[8]		4.25%
Debt, due date	[8]	Jan. 15, 2048		Jan. 15, 2048
Debt issuance costs, net of amortization		$ 3.3		$ 3.4
Debt instrument, effective interest rate		4.25%		4.25%
Term Loan
Debt Instrument [Line Items]
Debt issuance costs, net of amortization		$ 0.5		$ 0.8
United States Dollar Denominated Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding debt		$ 37.7		$ 218.3
United States Dollar Denominated Debt \| Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Average interest rate		1.4609%		1.5505%
Australian Dollar Denominated Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding debt		$ 44		$ 37.2
Australian Dollar Denominated Debt \| Revolving Credit Facility \| Australian Bank Bill Swap Bid Rate
Debt Instrument [Line Items]
Average interest rate		1.395%		1.465%
Euro Denominated Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding debt		$ 257.9		$ 167.5
Euro Denominated Debt \| Revolving Credit Facility \| EUR LIBOR
Debt Instrument [Line Items]
Average interest rate		1.375%		1.375%
Initial Aggregate Principal \| Unsecured 5.25% notes due June 1, 2045
Debt Instrument [Line Items]
Debt		$ 250		$ 250
Additional Aggregate Principal \| Unsecured 5.25% notes due June 1, 2045
Debt Instrument [Line Items]
Debt		$ 50						$ 50
Debt instrument, effective interest rate		4.839%						4.839%
Unamortization of debt premium		$ 2.9		$ 2.9

[1]	Interest at May 31, 2021 was tied to LIBOR and averaged 1.4609% for USD denominated debt ($37.7 million), 1.3950% for AUD denominated debt ($44.0 million) and 1.3750% on EUR denominated debt ($257.9 million). Interest at May 31, 2020 was tied to LIBOR and averaged 1.5505% for USD denominated debt ($218.3 million), 1.4650% for AUD denominated debt ($37.2 million) and 1.3750% on EUR denominated debt ($167.5 million). At May 31, 2021 and 2020, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $3.7 million, respectively.
[2]	At May 31, 2021 and 2020, the Term Loan is adjusted for deferred financing fees, net of amortization, of approximately $0.5 million and $0.8 million, respectively.
[3]	The $300.0 million face amount of the notes due 2022 is adjusted for the amortization of the original issue discount and mark-to-market derivative asset of approximated $0.1 million and ($0.8 million) at May 31, 2021 and approximated $0.1 million and ($1.3 million) at May 31, 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.465%. At May 31, 2021 and 2020, the notes are reduced by debt issuance costs, net of amortization, for approximately $0.4 million and $0.6 million, respectively.
[4]	The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.3 million and $2.6 million, respectively.
[5]	The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.4 million and $0.5 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568%
[6]	The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.4 million at May 31, 2021 and 2020. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.9 million at May 31, 2021 and 2020. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $2.9 million, respectively.
[7]	At May 31, 2020, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.2 million, respectively.
[8]	The $ 300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $ 3.3 million and $ 3.4 million at May 31, 2021 and 2020, respectively. The effective interest rate on the notes is 4.25 %.

Borrowings - Additional Informa

Borrowings - Additional Information (Detail) - USD ($)

Mar. 18, 2021

Apr. 30, 2020

Feb. 21, 2020

Dec. 20, 2017

May 09, 2014

Oct. 23, 2012

Nov. 30, 2018

May 31, 2021

May 31, 2020

May 31, 2015

Aug. 31, 2021

May 22, 2020

Feb. 27, 2019

Mar. 02, 2017

May 29, 2015

Debt Instrument [Line Items]

Maturities of long-term debt in 2022

$ 1,400,000

Maturities of long-term debt in 2023

701,500,000

Maturities of long-term debt in 2024

340,200,000

Maturities of long-term debt in 2025

500,000

Maturities of long-term debt in 2026

300,000

Maturities of long-term debt thereafter

1,350,900,000

Credit facility, available liquidity

1,200,000,000

Liquidity available

$ 1,457,100,000

Consolidated indebtedness

57.80%

66.80%

Credit facility borrowing potential maximum capacity

$ 1,500,000,000

Issuance of Debt

Debt Instrument [Line Items]

Covenant leverage ratio

425.00%

Issuance of Debt | Scenario Forecast

Debt Instrument [Line Items]

Covenant leverage ratio

425.00%

Accounts Receivable Securitization Program with Two Banks, through May 21, 2024

Debt Instrument [Line Items]

Credit facility borrowing maximum capacity

$ 250,000,000

$ 200,000,000

$ 250,000,000

Credit facility expiration date

May 21,
2024

May 21,
2021

Percentage of indirect economic interest held in SPE

100.00%

Outstanding balance

Unsecured senior notes, maturity date

[1]

May 21,
2024

Unsecured 3.45% senior notes due November 15, 2022

Debt Instrument [Line Items]

Issuance of note

$ 300,000,000

Debt, interest rate

3.45%

[2]

3.45%

[2]

Proceeds from issuance of note

$ 297,700,000

Unsecured senior notes, maturity date

[2]

Nov. 15,
2022

Unsecured 5.25% notes due June 1, 2045

Debt Instrument [Line Items]

Issuance of note

$ 50,000,000

$ 250,000,000

Debt, interest rate

5.25%

[3]

5.25%

[3]

5.25%

Note Interest payment frequency, term

Interest on the 2045 Notes is payable semiannually in arrears on June 1st and December 1st of each year at a rate of 5.250% per year

Unsecured senior notes, maturity date

[3]

Jun. 1,
2045

Unsecured 3.75% notes due March 15, 2027

Debt Instrument [Line Items]

Issuance of note

$ 400,000,000

Debt, interest rate

3.75%

[4]

3.75%

[4]

3.75%

Note Interest payment frequency, term

Interest on the 2027 Notes is payable semiannually in arrears on March 15th and September 15th of each year, at a rate of 3.750% per year

Unsecured senior notes, maturity date

[4]

Mar. 15,
2027

Unsecured 4.55% senior notes due March 1, 2029

Debt Instrument [Line Items]

Issuance of note

$ 350,000,000

Debt, interest rate

4.55%

[5]

4.55%

[5]

4.55%

Note Interest payment frequency, term

Interest on the 2029 Notes accrues from February 27, 2019 and is payable semiannually in arrears on March 1st and September 1st of each year, beginning September 1, 2019, at a rate of 4.550% per year.

Unsecured senior notes, maturity date

[5]

Mar. 1,
2029

Unsecured 4.25% notes due January 15, 2048

Debt Instrument [Line Items]

Issuance of note

$ 300,000,000

Debt, interest rate

4.25%

[6]

4.25%

[6]

Note Interest payment frequency, term

Interest on the 2048 Notes accrues from December 20, 2017 and is payable semiannually in arrears on January 15th and July 15th of each year, beginning July 15, 2018, at a rate of 4.250% per year.

Unsecured senior notes, maturity date

[6]

Jan. 15,
2048

Unsecured 6.50% senior notes due February 15, 2018

Debt Instrument [Line Items]

Debt, interest rate

6.50%

Unsecured senior notes, maturity date

Feb. 15,
2018

Repayments of unsecured senior notes

$ 250,000,000

Minimum | Issuance of Debt

Debt Instrument [Line Items]

Covenant leverage ratio

375.00%

Interest coverage ratio

350.00%

Minimum | Accounts Receivable Securitization Program with Two Banks, through May 21, 2024

Debt Instrument [Line Items]

Monthly unused commitment fee

0.30%

Maximum | Accounts Receivable Securitization Program with Two Banks, through May 21, 2024

Debt Instrument [Line Items]

Monthly unused commitment fee

0.50%

Margin

Debt Instrument [Line Items]

Basis spread on variable rate

0.85%

Revolving Credit Facility

Debt Instrument [Line Items]

Credit facility, available liquidity

$ 960,400,000

Credit facility borrowing maximum capacity

$ 1,300,000,000

$ 800,000,000

Credit facility expiration date

Oct. 31,
2023

Dec. 5,
2019

Payment of basis point fee

0.10%

Interest coverage ratio

1224.00%

Leverage ratio

217.00%

Unsecured senior notes, maturity date

[7]

Oct. 31,
2023

Revolving Credit Facility | Minimum

Debt Instrument [Line Items]

Covenant leverage ratio

375.00%

Acquisition aggregate consideration

$ 100,000,000

Revolving Credit Facility | Maximum

Debt Instrument [Line Items]

Covenant leverage ratio

425.00%

Revolving Credit Facility | Euro-Rate | Investment Grade

Debt Instrument [Line Items]

Basis spread on variable rate

1.75%

Revolving Credit Facility | Euro-Rate | Non-Investment Grade

Debt Instrument [Line Items]

Basis spread on variable rate

2.00%

Revolving Credit Facility | Base Rate | Investment Grade

Debt Instrument [Line Items]

Basis spread on variable rate

0.75%

Revolving Credit Facility | Base Rate | Non-Investment Grade

Debt Instrument [Line Items]

Basis spread on variable rate

1.00%

New Credit Facility

Debt Instrument [Line Items]

Credit facility expiration date

Feb. 21,
2023

Debt, interest rate

0.612%

New Credit Facility | Foreign Borrower

Debt Instrument [Line Items]

Debt, interest rate

0.558%

New Credit Facility | Issuance of Debt

Debt Instrument [Line Items]

Covenant leverage ratio

375.00%

New Credit Facility | Term Loan

Debt Instrument [Line Items]

Credit facility borrowing maximum capacity

$ 300,000,000

New Credit Facility | Term Loan | Foreign Borrower

Debt Instrument [Line Items]

Credit facility borrowing maximum capacity

$ 100,000,000

New Credit Facility | Minimum | Issuance of Debt

Debt Instrument [Line Items]

Interest coverage ratio

350.00%

Aggregate consideration for acquisition

$ 50,000,000

New Credit Facility | Maximum | Issuance of Debt

Debt Instrument [Line Items]

Covenant leverage ratio

425.00%

[1]

At May 31, 2020, the accounts receivable securitization program is adjusted for debt issuance costs, net of amortization, of approximately $0.2 million, respectively.

[2]

The $300.0 million face amount of the notes due 2022 is adjusted for the amortization of the original issue discount and mark-to-market derivative asset of approximated $0.1 million and ($0.8 million) at May 31, 2021 and approximated $0.1 million and ($1.3 million) at May 31, 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.465%. At May 31, 2021 and 2020, the notes are reduced by debt issuance costs, net of amortization, for approximately $0.4 million and $0.6 million, respectively.

[3]

The $250.0 million face amount of the notes due 2045 is adjusted for the amortization of the original issue discount, which approximated $1.4 million at May 31, 2021 and 2020. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 5.29%. In March 2017, as a further issuance of the 5.25% notes due 2045, we closed an offering of $50.0 million aggregate principal, which is adjusted for the unamortized premium received at issuance, which approximated $2.9 million at May 31, 2021 and 2020. The premium effectively increased the proceeds from the financing. The effective interest rate on the $50.0 million notes issued March 2017 is 4.839%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.8 million and $2.9 million, respectively.

[4]

The $400.0 million face amount of the notes due 2027 is adjusted for the amortization of the original issue discount, which approximated $0.2 million and $0.3 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, is 3.767%. At May 31, 2021 and 2020, the notes are adjusted for debt issuance costs, net of amortization, for approximately $2.3 million and $2.6 million, respectively.

[5]

The $350.0 million aggregate principal amount of the notes due 2029 is adjusted for the amortization of the original issue discount, which approximated $0.4 million and $0.5 million at May 31, 2021 and 2020, respectively. The original issue discount effectively reduced the ultimate proceeds from the financing. The effective interest rate on the notes, including the amortization of the discount, was 4.568%

[6]

The $ 300.0 million face amount of the notes due 2048 is adjusted for the debt issuance cost, net of amortization, which approximated $ 3.3 million and $ 3.4 million at May 31, 2021 and 2020, respectively. The effective interest rate on the notes is 4.25 %.

[7]

Interest at May 31, 2021 was tied to LIBOR and averaged 1.4609% for USD denominated debt ($37.7 million), 1.3950% for AUD denominated debt ($44.0 million) and 1.3750% on EUR denominated debt ($257.9 million). Interest at May 31, 2020 was tied to LIBOR and averaged 1.5505% for USD denominated debt ($218.3 million), 1.4650% for AUD denominated debt ($37.2 million) and 1.3750% on EUR denominated debt ($167.5 million). At May 31, 2021 and 2020, the revolving credit facility is adjusted for debt issuance costs, net of amortization, for approximately $2.6 million and $3.7 million, respectively.

Income before Income Taxes (Det

Income before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Income Tax Disclosure [Abstract]
Income Before Income Taxes, United States	$ 462,468	$ 317,290	$ 215,201
Income Before Income Taxes, Foreign	205,970	90,474	124,644
Income Before Income Taxes	$ 668,438	$ 407,764	$ 339,845

Provision (Benefit) for Income

Provision (Benefit) for Income Tax (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Current:
U.S. federal	$ 60,666	$ 65,195	$ 20,388
State and local	18,959	17,743	8,623
Foreign	65,125	31,894	37,713
Total Current	144,750	114,832	66,724
Deferred:
U.S. federal	20,027	(19,212)	15,298
State and local	3,878	(3,031)	1,414
Foreign	(3,717)	10,093	(11,278)
Total Deferred	20,188	(12,150)	5,434
Provision for Income Taxes	$ 164,938	$ 102,682	$ 72,158

Significant Components of Defer

Significant Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Deferred income tax assets related to:
Inventories	$ 12,189	$ 12,341
Allowance for losses		4,294
Accrued compensation and benefits	24,637	14,686
Accrued other expenses	28,511	15,107
Deferred income and other long-term liabilities	22,859	22,030
Credit and net operating and capital loss carryforwards	65,091	65,994
Net unrealized loss on securities	9,189	16,892
Pension and other postretirement benefits	34,180	76,147
Total Deferred Income Tax Assets	196,656	227,491
Less: valuation allowances	(64,696)	(66,855)
Net Deferred Income Tax Assets	131,960	160,636
Deferred income tax (liabilities) related to:
Depreciation	(85,717)	(70,588)
Amortization of intangibles	(107,963)	(109,926)
Unremitted foreign earnings	(17,871)	(8,781)
Total Deferred Income Tax (Liabilities)	(211,551)	(189,295)
Deferred Income Tax Assets (Liabilities), Net	$ (79,591)	$ (28,659)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
Income Taxes - Additional Information (Detail) - USD ($)	May 31, 2021	May 31, 2020	May 31, 2019
Income Tax [Line Items]
Foreign capital loss carryforwards	$ 26,800,000
Total Valuation Allowances	64,696,000	$ 66,855,000
Unrecognized tax benefits that would impact effective tax rate, if recognized	7,000,000	8,600,000	$ 7,700,000
Accrued interest and penalties related to unrecognized tax benefits	2,900,000	2,900,000	$ 3,000,000
Unremitted foreign earnings	466,600,000
Deferred income tax liability	17,871,000	$ 8,781,000
Remaining unremitted foreign earnings	1,200,000,000
Provision for deferred income taxes	0
Capital Loss Carryforwards
Income Tax [Line Items]
Tax credit carryforwards	25,800,000
Tax credit carry forward amount subject to expiration	$ 21,500,000
Tax credit carryforwards expiration year	2022
State
Income Tax [Line Items]
Net operating loss carryforwards	$ 4,500,000
Net operating loss carryforwards beginning expiration year	2022
Foreign
Income Tax [Line Items]
Tax credit carryforwards	$ 27,300,000
Tax credit carryforwards expiration year	2031
Foreign Net Operating Loss Carryforwards
Income Tax [Line Items]
Net operating loss carryforwards	$ 149,400,000
Net operating loss carryforwards beginning expiration year	2022
Net operating loss carryforwards subject to expiration	$ 14,700,000
Net operating loss carryforwards indefinite carry forward period	$ 134,700,000

Reconciliation of Income Tax Ex

Reconciliation of Income Tax Expense (Benefit) Computed by Applying U.S. Statutory Federal Income Tax Rate against Income (Loss) before Income Taxes to Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense at the U.S. statutory federal income tax rate	$ 140,372	$ 85,630	$ 71,367
Foreign rate differential and other foreign tax adjustments	11,942	3,433	(1,571)
State and local income taxes, net	18,625	11,651	7,224
Impact of GILTI provisions	1,598	3,051	5,772
Nondeductible business expense	616	2,005	2,259
Valuation allowance	(4,389)	14,008	7,021
Deferred tax liability for unremitted foreign earnings	5,348	(5,527)
Changes in unrecognized tax benefits	(1,847)	1,292	(8,480)
Other	1,324	(3,351)	1,195
FY19 GILTI impact of issued regulations		(4,348)
Equity-based compensation	(8,651)	(5,162)	(4,496)
Transition tax liability			(1,868)
Remeasurement of U.S. deferred income taxes			(6,265)
Provision for Income Taxes	$ 164,938	$ 102,682	$ 72,158
Effective Income Tax Rate	24.70%	25.20%	21.20%

Activity Related to Unrecognize

Activity Related to Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, beginning balance	$ 9	$ 8.1	$ 14.1
Additions based on tax positions related to current year			0.1
Additions for tax positions of prior years		2	2
Reductions for tax positions of prior years	(1.8)	(0.9)	(7.9)
Foreign currency translation	0.3
Foreign currency translation		(0.2)	(0.2)
Unrecognized tax benefits, ending balance	$ 7.5	$ 9	$ 8.1

Stock Repurchase Program - Addi

Stock Repurchase Program - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2021	May 31, 2021	May 31, 2020	May 31, 2019
Stock Repurchase Programs [Line Items]
Authorization of stock repurchase program		Jan. 8, 2008
Capital to be returned to stockholders through share repurchases		$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase, value	$ 469,700,000	$ 600,000,000
Stock repurchase program expiration date	May 31, 2021
Shares repurchased		594,061	2,041,847	3,286,907
Shares repurchased, value		$ 49,956,000	$ 125,000,000	$ 200,222,000
Repurchase of common stock price per shares		$ 84.09	$ 61.22	$ 60.92
Maximum
Stock Repurchase Programs [Line Items]
Stock repurchase program, remaining authorized repurchase, value		$ 419,800,000

Stock-Based Compensation Expens

Stock-Based Compensation Expense Included in Consolidated Statements of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 40,926	$ 19,789	$ 31,154
Stock-based compensation expense, included in restructuring expense	47	116	4,283
Total stock-based compensation cost	40,973	19,905	35,437
Income tax (benefit)	(6,877)	(2,784)	(6,937)
Total stock-based compensation cost, net of tax	34,096	17,121	28,500
SG&A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 40,926	$ 19,789	$ 31,154

Summary of Weighted-Average Ass

Summary of Weighted-Average Assumptions Related to SARs Grants (Detail) - SARs	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Schedule Of Weighted Average Assumptions [Line Items]
Risk-free interest rate	0.40%	1.90%	2.90%
Expected life of option	6 years 6 months	6 years 6 months	6 years 6 months
Expected dividend yield	1.80%	2.30%	2.10%
Expected volatility rate	24.00%	22.40%	25.20%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Jul. 22, 2020	Jul. 18, 2019	Oct. 03, 2018	Oct. 10, 2003	Oct. 31, 2019	May 31, 2021	May 31, 2020	May 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of options outstanding						$ 68.7
Weighted-average remaining contractual life of options outstanding						6 years 6 months 18 days
Aggregate intrinsic value of options exercisable						$ 45.4
Weighted-average remaining contractual life of options exercisable						5 years 3 months 7 days
Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan approval date						Oct. 9, 2014
2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense						$ 4.7
Shares of common stock authorized						6,000,000
Additional shares of common stock authorized					5,000,000
Shares available for future issuance						0
Directors Equity Incentive Plan 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan approval date				Oct. 10, 2003
Share based compensation arrangement vesting period				3 years
Unamortized stock-based compensation expense						$ 2
Shares granted to Directors						$ 87.35	$ 67.26	$ 60.50
Shares granted						19,000
Shares of common stock available for grant				500,000
Shares of restricted stock vested						25,000
2007 Plan and 2014 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted to Directors						$ 78.49	$ 62.17	$ 60.01
Shares granted						35,102
Shares outstanding						418,000	446,000
Employee Incentive Plan 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense						$ 0.2
Shares granted						0
SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights expected term						6 years 6 months	6 years 6 months	6 years 6 months
Unamortized stock-based compensation expense						$ 7.8
Unamortized stock-based compensation expense expected recognition period						2 years 5 months 1 day
Shares expected to vest						2,000,000
Shares expected to vest, weighted-average exercise price						$ 59.26
Shares expected to vest, weighted-average remaining contractual term						6 years 6 months
SARs \| Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights expected term						10 years
Share based compensation arrangement vesting period						4 years
Stock options outstanding						2,005,000
Full Value Stock Award \| 2014 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock authorized						3,000,000
Additional shares of common stock authorized					2,250,000
Performance Earned Restricted Stock Awards and Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement vesting period						3 years
Unamortized stock-based compensation expense						$ 18.7
Shares granted to Directors						$ 80.67	$ 63.52	$ 60.36
Shares granted						427,000
Shares of restricted stock vested						158,000
2018 Contingent Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted to Directors			$ 60.50
Shares granted			192,000
Performance goals attainment period for PSUs awards			3 years
Shares outstanding						158,000
2018 Contingent Performance Stock Units \| Earnings Before Interest Taxes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			50.00%
2018 Contingent Performance Stock Units \| Earnings Before Interest Taxes Margin
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			50.00%
2018 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			0.00%
2018 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage			200.00%
2019 Contingent Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense						$ 2.3
Unamortized stock-based compensation expense expected recognition period						1 year
Shares granted to Directors		$ 62.17
Shares granted		178,000
Performance goals attainment period for PSUs awards		3 years
Shares outstanding						178,000
2019 Contingent Performance Stock Units \| Earnings Before Interest Taxes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
2019 Contingent Performance Stock Units \| Earnings Before Interest Taxes Margin
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		50.00%
2019 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		0.00%
2019 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		200.00%
2020 Contingent Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense						$ 24.3
Unamortized stock-based compensation expense expected recognition period						2 years
Shares granted to Directors	$ 78.49
Shares granted	225,500
Performance goals attainment period for PSUs awards	3 years
Shares outstanding						225,500
2020 Contingent Performance Stock Units \| Earnings Before Interest Taxes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2020 Contingent Performance Stock Units \| Earnings Before Interest Taxes Margin
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	50.00%
2020 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%
2020 Contingent Performance Stock Units \| Upon Achievement of Performance Goals \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	200.00%
Nonvested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unamortized stock-based compensation expense						$ 52.2
Unamortized stock-based compensation expense expected recognition period						2 years 3 months 7 days
Shares granted to Directors						$ 80.77	$ 63.62	$ 60.34
Shares granted						481,000
Remaining weighted-average contractual term						2 years 3 months 7 days
Total fair value of shares vested						$ 12.5	$ 20.8	$ 37.8
Shares expected to vest						1,330,000
Shares expected to vest, weighted-average grant-date fair value						$ 67.65
Shares of restricted stock vested						250,000
Total intrinsic value of restricted shares converted						$ 20.7	$ 26.8	$ 58.1
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of restricted stock vested						250,329	420,571

Summary of Option and Share-Bas

Summary of Option and Share-Based Payment Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Stock Options And Stock Appreciation Rights
Weighted Average Exercise Price
Beginning balance	$ 49.88
Options granted	78.49
Options exercised	39.69
Ending balance	59.28	$ 49.88
Exercisable at May 31, 2021	$ 52.56
Number of Shares Under Option
Beginning balance	2,482
Options granted	360
Options exercised	(837)
Ending balance	2,005	2,482
Exercisable at May 31, 2021	1,107
SARs
Number of Shares Under Option
Weighted-average grant-date fair value per SAR	$ 14.38	$ 11.59	$ 14.08
Intrinsic value of options exercised	$ 8,800	$ 9,620	$ 9,290
Tax benefit from options exercised	8,821,000	5,936,000	3,210,000
Fair value of SARS vested	$ 12,590	$ 12,270	$ 9,300

Summary of Share-Based Performa

Summary of Share-Based Performance-Earned Restricted Stock and Performance Stock Units Activity (Detail) - Performance Earned Restricted Stock Awards and Performance Stock Units - $ / shares shares in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Weighted-Average Grant-Date Fair Value
Beginning balance	$ 60.51
Shares granted	80.67	$ 63.52	$ 60.36
Shares forfeited	65.24
Shares vested	53.69
Ending balance	$ 69.13	$ 60.51
Shares
Beginning balance	865
Shares granted	427
Shares forfeited	(18)
Shares vested	(158)
Ending balance	1,116	865

Share-Based Activity under 2003

Share-Based Activity under 2003 Plan (Detail) - Directors Equity Incentive Plan 2003 - $ / shares shares in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Weighted Average Grant-Date Fair Value
Beginning balance	$ 60.25
Shares granted to Directors	87.35	$ 67.26	$ 60.50
Shares vested	56.02
Ending balance	$ 71.19	$ 60.25
Shares
Beginning balance	62
Shares granted to directors	19
Shares vested	(25)
Ending balance	56	62

Awards and Restricted Stock Uni

Awards and Restricted Stock Units Issued under 2007 Plan and 2014 Omnibus Plan (Detail) - 2007 Plan and 2014 Omnibus Plan - $ / shares	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Weighted-Average Grant-Date Fair Value
Beginning Balance	$ 33.82
Shares granted	78.49	$ 62.17	$ 60.01
Shares exercised	33.25
Ending Balance	$ 37.89	$ 33.82
Shares
Beginning Balance	446,000
Shares granted	35,102
Shares exercised	(63,000)
Ending Balance	418,000	446,000

Summary of Activity for Nonvest

Summary of Activity for Nonvested Restricted Shares (Detail) - Nonvested Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Weighted-Average Grant-Date Fair Value
Beginning balance	$ 58.03
Granted	80.77	$ 63.62	$ 60.34
Vested	49.95
Forfeited	65.24
Ending balance	$ 67.65	$ 58.03
Shares
Beginning balance	1,120
Granted	481
Vested	(250)
Forfeited	(18)
Ending balance	1,333	1,120

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 1,264,663	$ 1,408,605	$ 1,633,538
Deferred taxes	27,783	(23,403)	(19,068)
Ending Balance	1,743,025	1,264,663	1,408,605
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(440,732)	(370,495)	(300,013)
Other comprehensive income (loss)	148,360	(71,820)	(73,660)
Deferred taxes	(7,993)	1,583	3,178
Ending Balance	(300,365)	(440,732)	(370,495)
Pension And Other Postretirement Benefit Liability Adjustments, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(277,717)	(211,645)	(157,495)
Other comprehensive income (loss)	113,984	(86,347)	(70,785)
Deferred taxes	(26,877)	20,275	16,635
Ending Balance	(190,610)	(277,717)	(211,645)
Unrealized Gain (Loss) On Derivatives, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(71)	4,379	(131)
Other comprehensive income (loss)	(31,087)	(6,315)	4,713
Deferred taxes	7,176	1,865	(203)
Ending Balance	(23,982)	(71)	4,379
Unrealized Gain (Loss) On Securities, Net of Tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	1,023	133	(1,409)
Reclassification adjustments for gains (losses) included in net income, net of taxes of $151, $591, $401 in 2020, 2019 and 2018	191		1,777
Other comprehensive income (loss)	(1,052)	1,210	307
Deferred taxes	(89)	(320)	(542)
Ending Balance	73	1,023	133
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(717,497)	(577,628)	(459,048)
Reclassification adjustments for gains (losses) included in net income, net of taxes of $151, $591, $401 in 2020, 2019 and 2018	191		1,777
Other comprehensive income (loss)	230,205	(163,272)	(139,425)
Deferred taxes	(27,783)	23,403	19,068
Ending Balance	$ (514,884)	$ (717,497)	$ (577,628)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Reclassification adjustments for gains (losses) included in net income, taxes	$ 77	$ 0	$ 151

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		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Numerator for earnings per share:
Net income attributable to RPM International Inc. stockholders		$ 502,643	$ 304,385	$ 266,558
Less: Allocation of earnings and dividends to participating securities		(4,018)	(1,956)	(1,514)
Net income available to common shareholders - basic		498,625	302,429	265,044
Reverse: Allocation of earnings and dividends to participating securities			1,956	1,514
Add: Undistributed earnings reallocated to unvested shareholders		13
Add: Income effect of contingently issuable shares				3,655
Net income available to common shareholders - diluted		$ 498,638	$ 304,385	$ 270,213
Denominator for basic and diluted earnings per share:
Basic weighted average common shares		128,334	128,468	130,552
Average diluted options		593	1,506	1,838
Net issuable common share equivalents	[1]			1,943
Total shares for diluted earnings per share	[2]	128,927	129,974	134,333
Earnings Per Share of Common Stock Attributable to RPM International Inc. Stockholders:
Basic Earnings Per Share of Common Stock		$ 3.89	$ 2.35	$ 2.03
Method used to calculate basic earnings per share		Two-Class	Two-Class	Two-Class
Diluted Earnings Per Share of Common Stock		$ 3.87	$ 2.34	$ 2.01
Method used to calculate diluted earnings per share		Two-Class	Treasury	Treasury

[1]	Represents the number of shares that would be issued if our contingently convertible notes had been converted. We included these shares in the calculation of diluted EPS as the conversion of the notes were eligible to be settled, at our election, in cash, shares of our common stock, or a combination of cash and shares of our common stock. On November 27, 2018, we redeemed all of our 2.25% convertible senior notes due 2020, primarily for cash, but also issued 598,601 shares of our common stock in the transaction.
[2]	For the years ended May 31, 2021, 2020 and 2019, approximately 362,016, 340,000 and 862,500 shares of stock, respectively, granted under stock-based compensation plans were excluded from the calculation of diluted EPS, as the effect would have been anti-dilutive.

Reconciliation of Numerator a_2

Reconciliation of Numerator and Denominator of Basic and Diluted Earnings Per Share (Parenthetical) (Detail) - shares	Nov. 27, 2018	May 31, 2021	May 31, 2020	May 31, 2019	Nov. 30, 2018
Stock-Based Compensation Plans
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted earnings per share		362,016	340,000	862,500
2.25% Convertible Senior Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Debt instrument redemption date	Nov. 27, 2018
Debt, interest rate	2.25%				2.25%
Debt instrument maturity year	2020
Debt conversion, common stock shares issued	598,601

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2021	May 31, 2019
Lessee Lease Description [Line Items]
Lessee, operating lease, option to extend description	Some leases include one or more options to renew, generally at our sole discretion, with renewal terms that can extend the lease term from one to five years or more.
Lessee, operating lease, existence of option to extend	true
Lessee, operating lease, option to terminate description	In addition, certain leases contain termination options, where the rights to terminate are held by either us, the lessor, or both parties.
Lessee, operating lease, existence of option to terminate	true
Rental expense for operating leases		$ 64.9
Minimum
Lessee Lease Description [Line Items]
Lessee, operating lease, renewal term	1 year
Maximum
Lessee Lease Description [Line Items]
Lessee, operating lease, renewal term	5 years

Summary of Lease Costs (Details

Summary of Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
Summary of Lease Costs (Details) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Leases [Abstract]
Operating lease expense	$ 76,581	$ 73,665
Variable lease expense	9,292	7,243
Short-term lease expense	$ 2,022	$ 2,583

Summary of Supplemental Cash Fl

Summary of Supplemental Cash Flow, Balance Sheet, and Other Required Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	May 31, 2020	May 31, 2021
Leases [Abstract]
Operating cash outflows from operating leases	$ 69,444	$ 71,257
Leased assets obtained in exchange for operating lease obligations	61,614	69,375
Current portion of operating leases within Other Accrued Liabilities	$ 52,589	$ 58,563
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Weighted average remaining lease term for operating leases (in years)	9 years 1 month 6 days	8 years 7 months 6 days
Weighted average discount rate for operating leases	3.70%	3.40%

Schedule of Future Undiscounted

Schedule of Future Undiscounted Cash Flows and Reconciliation to Lease Liabilities (Detail) $ in Thousands	May 31, 2021USD ($)
Leases [Abstract]
2022	$ 67,058
2023	54,667
2024	42,986
2025	34,464
2026	29,655
Thereafter	142,155
Total lease payments	370,985
Less imputed interest	55,007
Total present value of lease liabilities	$ 315,978

Pension Plans - Additional Info

Pension Plans - Additional Information (Detail) - Pension Benefits - USD ($)	1 Months Ended	12 Months Ended
	Feb. 28, 2021	May 31, 2021	May 31, 2020	May 31, 2019
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Average compensation with accrued benefits vesting period				5 years
Estimated benefits payable in the first year		$ 71,600,000
Estimated benefits payable in the second year		71,200,000
Estimated benefits payable in the third year		75,100,000
Estimated benefits payable in the fourth year		75,900,000
Estimated benefits payable in the fifth year		77,100,000
Estimated benefits payable in the years thereafter		375,800,000
Matching contribution charged to income		21,700,000	$ 21,100,000	$ 19,400,000
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		1,000,000
Contribution to retirement plan in the current	$ 62,300,000	62,264,000	52,182,000
Required contribution to retirement plans in the current fiscal year		8,000
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		5,000,000
Contribution to retirement plan in the current		$ 7,119,000	$ 6,331,000

Retirement-Related Benefit Plan

Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - Pension Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 44,520	$ 39,425	$ 37,528
Interest cost	15,223	20,415	21,987
Expected return on plan assets	(33,115)	(34,291)	(33,867)
Prior service cost	8	9	118
Net actuarial losses recognized	30,005	18,516	13,087
Net Pension Cost	56,641	44,074	38,853
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	6,355	5,400	4,693
Interest cost	5,308	4,842	5,420
Expected return on plan assets	(7,286)	(7,118)	(7,907)
Prior service cost	(150)	(36)	(30)
Net actuarial losses recognized	2,377	2,029	1,229
Curtailment/settlement losses	356	86	89
Net Pension Cost	$ 6,960	$ 5,203	$ 3,494

Changes in Benefits Obligations

Changes in Benefits Obligations and Plan Assets, Pension (Detail) - Pension Benefits - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 28, 2021	May 31, 2021	May 31, 2020	May 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year		$ 762,739	$ 660,277
Service cost		44,520	39,425	$ 37,528
Interest cost		15,223	20,415	21,987
Benefits paid		(64,139)	(41,186)
Actuarial losses/(gains)		63,730	83,808
Benefit Obligation at End of Year		822,073	762,739	660,277
Balance at Beginning of Period		516,550	496,865
Actual return on plan assets		157,702	8,689
Employer contributions	$ 62,300	62,264	52,182
Benefits paid		(64,139)	(41,186)
Balance at End of Period		672,377	516,550	496,865
(Deficit)/Surplus of plan assets versus benefit obligations at end of year		(149,696)	(246,189)
Net Amount Recognized		(149,696)	(246,189)
Accumulated Benefit Obligation		702,315	662,197
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year		210,278	205,967
Service cost		6,355	5,400	4,693
Interest cost		5,308	4,842	5,420
Benefits paid		(9,248)	(6,269)
Participant contributions		1,140	1,106
Plan amendments			(893)
Plan combination			922
Plan settlements/curtailments		(2,342)	(288)
Actuarial losses/(gains)		(7,774)	2,718
Premiums paid		(103)	(99)
Currency exchange rate changes		28,414	(3,128)
Benefit Obligation at End of Year		232,028	210,278	205,967
Balance at Beginning of Period		194,874	187,112
Actual return on plan assets		21,350	9,899
Employer contributions		7,119	6,331
Participant contributions		1,140	1,106
Benefits paid		(9,248)	(6,269)
Plan combination			182
Premiums paid		(103)	(99)
Plan settlements/curtailments		(2,327)	(281)
Currency exchange rate changes		27,048	(3,107)
Balance at End of Period		239,853	194,874	$ 187,112
(Deficit)/Surplus of plan assets versus benefit obligations at end of year		7,825	(15,404)
Net Amount Recognized		7,825	(15,404)
Accumulated Benefit Obligation		$ 217,012	$ 197,167

Amounts Recognized in Consolida

Amounts Recognized in Consolidated Balance Sheet, Pension (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Current liabilities	$ (8)	$ (8)
Noncurrent liabilities	(149,688)	(246,181)
Net Amount Recognized	(149,696)	(246,189)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Noncurrent assets	22,698	13,395
Current liabilities	(471)	(547)
Noncurrent liabilities	(14,402)	(28,252)
Net Amount Recognized	$ 7,825	$ (15,404)

Relationship between Plans Bene

Relationship between Plans Benefit Obligations and Assets (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Plans with projected benefit obligations in excess of plan assets, benefit obligation	$ 822,073	$ 762,739
Plans with accumulated benefit obligations in excess of plan assets, benefit obligation	702,315	662,197
Plans with projected benefit obligations in excess of plan assets, plan asset	672,377	516,550
Plans with accumulated benefit obligations in excess of plan assets, plan asset	672,377	516,550
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Plans with projected benefit obligations in excess of plan assets, benefit obligation	45,294	163,589
Plans with accumulated benefit obligations in excess of plan assets, benefit obligation	43,522	150,478
Plans with assets in excess of projected benefit obligations	186,734	46,689
Plans with assets in excess of accumulated benefit obligations	173,490	46,689
Plans with projected benefit obligations in excess of plan assets, plan asset	30,421	134,791
Plans with accumulated benefit obligations in excess of plan assets, plan asset	30,421	134,598
Plans with assets in excess of projected benefit obligations, plan asset	209,432	60,083
Plans with assets in excess of accumulated benefit obligations, plan asset	$ 209,432	$ 60,276

Pretax Net Actuarial Loss and P

Pretax Net Actuarial Loss and Prior Service (Costs) Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings,Pension (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
U.S. Plans
Schedule of Net Periodic Benefit Costs and Assumptions for Defined Benefit Postretirement Plans [Line Items]
Net actuarial loss	$ (250,317)	$ (341,179)
Prior service (costs) credits	(12)	(20)
Total recognized in accumulated other comprehensive income not affecting retained earnings	(250,329)	(341,199)
Non-U.S. Plans
Schedule of Net Periodic Benefit Costs and Assumptions for Defined Benefit Postretirement Plans [Line Items]
Net actuarial loss	(30,045)	(48,090)
Prior service (costs) credits	1,023	1,098
Total recognized in accumulated other comprehensive income not affecting retained earnings	$ (29,022)	$ (46,992)

Changes Recognized in Other Com

Changes Recognized in Other Comprehensive Income, Pension (Detail) - Pension Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
U.S. Plans
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net loss (gain) arising during the year	$ (60,857)	$ 109,409
Amounts recognized as a component of net periodic benefit cost:
Amortization or curtailment recognition of prior service (cost) benefit	(8)	(9)
Amortization or settlement recognition of net (loss)	(30,005)	(18,516)
Total recognized in other comprehensive loss (income)	(90,870)	90,884
Non-U.S. Plans
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Prior service cost		(893)
Net loss (gain) arising during the year	(21,838)	(70)
Effect of exchange rates on amounts included in AOCI	6,465	(922)
Amounts recognized as a component of net periodic benefit cost:
Amortization or curtailment recognition of prior service (cost) benefit	150	36
Amortization or settlement recognition of net (loss)	(2,748)	(2,115)
Total recognized in other comprehensive loss (income)	$ (17,971)	$ (3,964)

Weighted-Average Assumptions us

Weighted-Average Assumptions used to Determine Benefit Obligations and Net Periodic Pension Cost (Detail) - Pension Benefits	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Year-End Benefit Obligations, Discount rate	2.75%	2.77%
Year-End Benefit Obligations, Rate of compensation increase	3.19%	3.19%
Net Periodic Pension Cost, Discount rate	2.78%	3.65%	4.12%
Net Periodic Pension Cost, Expected return on plan assets	7.00%	7.40%	7.40%
Net Periodic Pension Cost, Rate of compensation increase	3.19%	3.80%	3.80%
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Year-End Benefit Obligations, Discount rate	2.72%	2.49%
Year-End Benefit Obligations, Rate of compensation increase	2.91%	2.86%
Net Periodic Pension Cost, Discount rate	2.49%	2.61%	3.09%
Net Periodic Pension Cost, Expected return on plan assets	3.30%	3.91%	4.30%
Net Periodic Pension Cost, Rate of compensation increase	2.86%	2.86%	2.85%

Weighted-Average Actual Target

Weighted-Average Actual Target Allocation of Plan Assets (Detail) - Pension Benefits - USD ($) $ in Thousands		May 31, 2021	May 31, 2020	May 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		100.00%
Actual Asset Allocation		$ 672,377	$ 516,550	$ 496,865
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		100.00%
Actual Asset Allocation		$ 239,853	194,874	$ 187,112
Equity securities \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		55.00%
Actual Asset Allocation		$ 387,100	261,000
Equity securities \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		37.00%
Actual Asset Allocation		$ 103,400	79,300
Fixed income securities \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		25.00%
Actual Asset Allocation		$ 112,000	106,400
Fixed income securities \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		47.00%
Actual Asset Allocation		$ 108,200	88,200
Multi-class \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		20.00%
Actual Asset Allocation		$ 150,800	118,200
Cash \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation	[1]	22,300	30,800
Cash \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation		100	100
Real Estate \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation		$ 200	200
Real Estate \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation		16.00%
Actual Asset Allocation		$ 28,200	$ 27,300

[1]	The larger than target cash position at May 31, 2021 results from our February 2021 contribution to the RPM International Inc. Retirement Plan because of our plans to invest the February contribution over a period of time, due to dollar cost averaging.

Pension Plan Assets Categorized

Pension Plan Assets Categorized Using Fair Value Hierarchy (Detail) - Pension Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020	May 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	$ 672,377	$ 516,550	$ 496,865
U.S. Plans \| U.S. Treasury and other government
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	20,752	12,973
U.S. Plans \| State and Municipal Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	767	508
U.S. Plans \| Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	1,068	715
U.S. Plans \| Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	17,628	23,824
U.S. Plans \| Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	42,370	34,317
U.S. Plans \| Large Cap Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	40,332	19,589
U.S. Plans \| Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	346,790	241,426
U.S. Plans \| Mutal Funds - Multi-class
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	150,838	118,205
U.S. Plans \| Debt Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	29,440	33,993
U.S. Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	22,224	30,830
U.S. Plans \| Limited Partner
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	168	170
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	239,853	194,874	187,112
Non-U.S. Plans \| Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	717	603
Non-U.S. Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	77	67
Non-U.S. Plans \| Pooled Equity Securities Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	101,975	78,472
Non-U.S. Plans \| Pooled Funds Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	107,457	87,610
Non-U.S. Plans \| Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	28,230	27,267
Non-U.S. Plans \| Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	1,397	855
Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	62,556	50,419
Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Plans \| Large Cap Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	40,332	19,589
Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	22,224	30,830
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	77	67
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Non-U.S. Plans \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	77	67
Significant Other Observable Inputs (Level 2) \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	609,653	465,961
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| U.S. Treasury and other government
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	20,752	12,973
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| State and Municipal Debt Obligations
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	767	508
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	1,068	715
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Mortgage-backed securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	17,628	23,824
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	42,370	34,317
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Equity Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	346,790	241,426
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Mutal Funds - Multi-class
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	150,838	118,205
Significant Other Observable Inputs (Level 2) \| U.S. Plans \| Debt Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	29,440	33,993
Significant Other Observable Inputs (Level 2) \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	211,546	167,540
Significant Other Observable Inputs (Level 2) \| Non-U.S. Plans \| Foreign Covered Bonds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	717	603
Significant Other Observable Inputs (Level 2) \| Non-U.S. Plans \| Pooled Equity Securities Funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	101,975	78,472
Significant Other Observable Inputs (Level 2) \| Non-U.S. Plans \| Pooled Funds Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	107,457	87,610
Significant Other Observable Inputs (Level 2) \| Non-U.S. Plans \| Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	1,397	855
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	28,398	27,437	$ 28,015
Significant Unobservable Inputs (Level 3) \| U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	168	170
Significant Unobservable Inputs (Level 3) \| U.S. Plans \| Limited Partner
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	168	170
Significant Unobservable Inputs (Level 3) \| Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	28,230	27,267
Significant Unobservable Inputs (Level 3) \| Non-U.S. Plans \| Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Pension plans with Plan Assets	$ 28,230	$ 27,267

Activity that Occurred for Leve

Activity that Occurred for Level Three Assets (Detail) - Significant Unobservable Inputs (Level 3) - Pension Benefits - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Balance at Beginning of Period		$ 27,437	$ 28,015
Actual Return on Plan Assets For Assets Still Held at Reporting Date		455	(691)
Settlements	[1]	506	113
Balance at End of Period		$ 28,398	$ 27,437

[1]	Includes the impact of exchange rate changes during the year.

Components of Net Postretiremen

Components of Net Postretirement Expense (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Domestic
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost on the accumulated obligation	$ 74	$ 149	$ 192
Prior service (credit)	(167)	(219)	(219)
Net actuarial (gains) losses	42	(66)	(26)
Net Pension Cost	(51)	(136)	(53)
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost - benefits earned during the period	1,959	1,661	1,507
Interest cost on the accumulated obligation	1,286	1,089	1,122
Net actuarial (gains) losses	590	611	442
Net Pension Cost	$ 3,835	$ 3,361	$ 3,071

Changes in Benefit Obligation (

Changes in Benefit Obligation (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Domestic
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year	$ 4,182	$ 4,990
Interest cost	74	149	$ 192
Benefit payments	(1,902)	(1,659)
Actuarial (gains) losses	152	702
Benefit Obligation at End of Year	2,506	4,182	4,990
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year	38,389	37,663
Service cost	1,959	1,661	1,507
Interest cost	1,286	1,089	1,122
Benefit payments	(673)	(639)
Actuarial (gains) losses	(6,415)	(683)
Currency exchange rate changes	5,428	(702)
Benefit Obligation at End of Year	$ 39,974	$ 38,389	$ 37,663

Amounts Recognized in Consoli_2

Amounts Recognized in Consolidated Balance Sheets, Postretirement (Detail) - Postretirement Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Domestic
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Current liabilities	$ (238)	$ (385)
Noncurrent liabilities	(2,268)	(3,797)
Net Amount Recognized	(2,506)	(4,182)
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Current liabilities	(931)	(805)
Noncurrent liabilities	(39,043)	(37,584)
Net Amount Recognized	$ (39,974)	$ (38,389)

Pretax Net Actuarial (Loss), Pr

Pretax Net Actuarial (Loss), Prior Service (Cost) and Transition Assets/(Obligation) Recognized in Accumulated Other Comprehensive Income (Loss) not Affecting Retained Earnings, Postretirement (Detail) - Postretirement Benefits - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Domestic
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial (loss)	$ (497)	$ (386)
Prior service credits	281	448
Total recognized in accumulated other comprehensive income not affecting retained earnings	(216)	62
Non-U.S. Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial (loss)	(5,901)	(11,331)
Total recognized in accumulated other comprehensive income not affecting retained earnings	$ (5,901)	$ (11,331)

Changes Recognized in Other C_2

Changes Recognized in Other Comprehensive Income, Postretirement Benefits (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
Domestic
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net loss (gain) arising during the year	$ 152	$ 702
Amounts recognized as a component of net periodic benefit cost:
Amortization or curtailment recognition of prior service credit	167	219
Amortization or settlement recognition of net gain (loss)	(41)	66
Total recognized in other comprehensive loss (income)	278	987
Non-U.S. Plans
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net loss (gain) arising during the year	(6,415)	(683)
Effect of exchange rates on amounts included in AOCI	1,574	(266)
Amounts recognized as a component of net periodic benefit cost:
Amortization or settlement recognition of net gain (loss)	(590)	(611)
Total recognized in other comprehensive loss (income)	$ (5,431)	$ (1,560)

Weighted-Average Assumptions _2

Weighted-Average Assumptions used to Determine Benefit Obligations and Net Periodic Postretirement Cost (Detail) - Postretirement Benefits	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Domestic
Health Care Cost Trend Rates Assumptions [Line Items]
Year-End Benefit Obligations, Discount rate	2.47%	2.44%
Year-End Benefit Obligations, Current healthcare cost trend rate	6.07%	6.68%
Year-End Benefit Obligations, Ultimate healthcare cost trend rate	4.36%	4.36%
Year-End Benefit Obligation, Year ultimate healthcare cost trend rate will be realized	2037	2037
Net Periodic Postretirement Cost, Discount rate	2.44%	3.44%	4.03%
Net Periodic Postretirement Cost, Healthcare cost trend rate	6.68%	7.29%	7.86%
Net Periodic Postretirement Cost, Ultimate healthcare cost trend rate	4.36%	4.36%	4.36%
Net Periodic Postretirement Cost, Year ultimate healthcare cost trend rate will be realized	2037	2037	2037
Non-U.S. Plans
Health Care Cost Trend Rates Assumptions [Line Items]
Year-End Benefit Obligations, Discount rate	3.51%	3.32%
Year-End Benefit Obligations, Current healthcare cost trend rate	5.68%	5.73%
Year-End Benefit Obligations, Ultimate healthcare cost trend rate	3.70%	3.70%
Year-End Benefit Obligation, Year ultimate healthcare cost trend rate will be realized	2040	2040
Net Periodic Postretirement Cost, Discount rate	3.32%	3.22%	3.70%
Net Periodic Postretirement Cost, Healthcare cost trend rate	5.73%	5.77%	6.02%
Net Periodic Postretirement Cost, Ultimate healthcare cost trend rate	3.70%	3.70%	4.20%
Net Periodic Postretirement Cost, Year ultimate healthcare cost trend rate will be realized	2040	2040	2032

Postretirement Benefits - Addit

Postretirement Benefits - Additional Information (Detail) - Postretirement Benefits $ in Millions	May 31, 2021USD ($)
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Estimated benefits payable in the years thereafter	$ 9.3
Minimum
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Estimated benefits payable in the first year	1.2
Estimated benefits payable in the second year	1.2
Estimated benefits payable in the third year	1.2
Estimated benefits payable in the fourth year	1.2
Estimated benefits payable in the fifth year	1.2
Maximum
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
Estimated benefits payable in the first year	1.5
Estimated benefits payable in the second year	1.5
Estimated benefits payable in the third year	1.5
Estimated benefits payable in the fourth year	1.5
Estimated benefits payable in the fifth year	$ 1.5

Accrued Loss Reserves (Detail)

Accrued Loss Reserves (Detail) - USD ($) $ in Thousands	May 31, 2021	May 31, 2020
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	$ 29,054	$ 20,021
Accrued Loss Reserves - Noncurrent	36,627	34,654
Accrued product liability reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	18,296	10,458
Accrued Loss Reserves - Noncurrent	26,614	27,016
Accrued warranty reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	9,429	7,593
Accrued Loss Reserves - Noncurrent	3,746	3,513
Accrued environmental reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	1,329	1,970
Accrued Loss Reserves - Noncurrent	$ 6,267	$ 4,125

Changes in Accrued Warranty Bal

Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Commitments And Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,106	$ 10,414	$ 11,721
Deductions	[1]	(25,817)	(20,762)	(22,262)
Provision charged to expense		27,886	21,454	20,955
Ending Balance		$ 13,175	$ 11,106	$ 10,414

[1]	Primarily claims paid during the year.

Contingencies and Accrued Los_3

Contingencies and Accrued Losses - Additional Information (Detail) - USD ($)	Dec. 22, 2020	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2021	May 31, 2020	May 31, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in net income due to restatement effect					$ 502,643,000	$ 304,385,000	$ 266,558,000
Penalty to be paid	$ 2,000,000
General Counsel
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Penalty to be paid	$ 22,500
Restatements
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Increase (decrease) in net income due to restatement effect		$ 18,000,000	$ (10,800,000)	$ (7,200,000)

Revenue - Additional Informatio

Revenue - Additional Information (Detail) $ in Thousands		3 Months Ended	12 Months Ended
Revenue - Additional Information (Detail) $ in Thousands		May 31, 2021USD ($)	May 31, 2021USD ($)Segment	May 31, 2020USD ($)Segment	May 31, 2019USD ($)
Disaggregation Of Revenue [Line Items]
Number of reportable segments \| Segment			4	4
Revenue performance obligation description of payment terms			Payment terms and conditions vary by contract type, although our customers’ payment terms generally include a requirement to pay within 30 to 60 days of fulfilling our performance obligations.
Revenue, Practical Expedient, Financing Component [true false]			false
Net contract assets (liabilities)			$ 144
Net Sales	[1]		6,106,288	$ 5,506,994	$ 5,564,551
Long-term deferred revenue		$ 67,800	$ 67,800	$ 66,000
General Contracting And Roofing Services
Disaggregation Of Revenue [Line Items]
Net Sales		$ 200

[1]	It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines.

Summary of Trade Accounts Recei

Summary of Trade Accounts Receivable Net of Allowances and Net Contract Assets (Liabilities) (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020
Disaggregation Of Revenue [Line Items]
Trade accounts receivable, less allowance	$ 1,280,806	$ 1,137,957
Contract assets	33,217	25,249
Contract liabilities - short-term	(33,112)	(25,288)
Net Contract Assets/(Liabilities)	105	$ (39)
Change in Contract with Customer, Asset and Liability [Abstract]
Change in trade accounts receivable, less allowance	142,849
Change in contract assets	7,968
Change in Net Contract Assets (Liabilities)	$ 144
Percentage of change in trade accounts receivable, less allowance	12.60%
Percentage of change in contract assets	31.60%
Percentage of change in Net Contract Assets/(Liabilities)	(369.20%)
Short-term
Change in Contract with Customer, Asset and Liability [Abstract]
Change in contract liabilities	$ (7,824)
Percentage of change in contract liabilities	30.90%

Summary of Activity for Allowan

Summary of Activity for Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Accounts receivable, allowance for credit loss [Roll Forward]
Beginning balance	$ 55,847
Bad debt provision	10,044	$ 16,700	$ 18,600
Uncollectible accounts written off, net of recoveries	(14,182)
Translation adjustments	4,213
Ending balance	$ 55,922	$ 55,847

Segment Information - Additiona

Segment Information - Additional Information (Detail) - Segment	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Number of reportable segments	4	4
Number of operating segments	4
Consumer Segment \| Sales \| Customer Concentration Risk \| Home Depot
Segment Reporting Information [Line Items]
Percentage of net sales	26.00%	26.00%	29.00%
Maximum \| Sales \| Customer Concentration Risk \| Home Depot
Segment Reporting Information [Line Items]
Percentage of net sales	10.00%	10.00%	10.00%

Results of Reportable Segments

Results of Reportable Segments (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 6,106,288	$ 5,506,994	$ 5,564,551
Income (Loss) Before Income Taxes		668,438	407,764	339,845
Identifiable Assets		6,252,969	5,630,954	5,441,355
Capital Expenditures		159,441	157,279	136,757
Depreciation and Amortization		146,857	156,842	141,742
Operating Segments \| CPG Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	2,076,565	1,880,105	1,899,744
Income (Loss) Before Income Taxes		291,773	209,663	178,823
Identifiable Assets		1,815,303	1,622,632	1,573,329
Capital Expenditures		65,830	63,393	40,119
Depreciation and Amortization		45,079	46,491	44,150
Operating Segments \| PCG Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	1,028,456	1,080,701	1,136,119
Income (Loss) Before Income Taxes		90,687	102,345	77,388
Identifiable Assets		1,051,334	925,569	951,644
Capital Expenditures		19,413	23,868	22,158
Depreciation and Amortization		22,633	23,850	27,116
Operating Segments \| Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	2,295,277	1,945,220	1,858,453
Income (Loss) Before Income Taxes		354,789	198,024	217,448
Identifiable Assets		2,386,703	2,067,017	1,953,279
Capital Expenditures		54,986	47,331	45,039
Depreciation and Amortization		47,763	56,570	40,231
Operating Segments \| SPG Segments
Segment Reporting Information [Line Items]
Net Sales	[1]	705,990	600,968	670,235
Income (Loss) Before Income Taxes		108,242	57,933	86,018
Identifiable Assets		772,540	728,449	689,133
Capital Expenditures		18,989	21,610	28,006
Depreciation and Amortization		26,017	24,111	25,199
Corporate/Other
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes		(177,053)	(160,201)	(219,832)
Identifiable Assets		227,089	287,287	273,970
Capital Expenditures		223	1,077	1,435
Depreciation and Amortization		$ 5,365	$ 5,820	$ 5,046

[1]	It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines.

Net Sales and Long Lived Assets

Net Sales and Long Lived Assets by Regions (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 6,106,288	$ 5,506,994	$ 5,564,551
Long-Lived Assets	[2]	3,444,161	3,176,631	2,888,355
Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	4,161,069	3,788,223	3,676,504
Long-Lived Assets	[2]	2,325,365	2,146,333	1,859,628
Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	1,945,219	1,718,771	1,888,047
Long-Lived Assets	[2]	1,118,796	1,030,298	1,028,727
Foreign \| Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	440,656	356,453	390,199
Long-Lived Assets	[2]	235,810	224,177	242,582
Foreign \| Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	1,062,888	936,098	1,029,024
Long-Lived Assets	[2]	394,168	358,511	343,501
Foreign \| United Kingdom
Segment Reporting Information [Line Items]
Long-Lived Assets	[2]	290,078	252,185	217,414
Foreign \| Latin America
Segment Reporting Information [Line Items]
Net Sales	[1]	218,664	209,807	219,044
Foreign \| Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	[1]	154,079	152,264	177,868
Foreign \| Other Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	68,932	64,149	71,912
Long-Lived Assets	[2]	198,740	195,425	225,230
Operating Segments \| CPG Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	2,076,565	1,880,105	1,899,744
Operating Segments \| CPG Segment \| Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	1,135,341	1,068,552	1,003,227
Operating Segments \| CPG Segment \| Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	941,224	811,553	896,517
Operating Segments \| CPG Segment \| Foreign \| Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	208,289	159,986	181,089
Operating Segments \| CPG Segment \| Foreign \| Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	481,244	418,249	477,761
Operating Segments \| CPG Segment \| Foreign \| Latin America
Segment Reporting Information [Line Items]
Net Sales	[1]	159,197	151,099	155,039
Operating Segments \| CPG Segment \| Foreign \| Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	[1]	79,413	73,629	81,895
Operating Segments \| CPG Segment \| Foreign \| Other Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	13,081	8,590	733
Operating Segments \| PCG Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	1,028,456	1,080,701	1,136,119
Operating Segments \| PCG Segment \| Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	611,808	656,162	667,402
Operating Segments \| PCG Segment \| Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	416,648	424,539	468,717
Operating Segments \| PCG Segment \| Foreign \| Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	69,754	71,689	82,897
Operating Segments \| PCG Segment \| Foreign \| Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	242,102	247,904	251,600
Operating Segments \| PCG Segment \| Foreign \| Latin America
Segment Reporting Information [Line Items]
Net Sales	[1]	26,283	32,471	34,588
Operating Segments \| PCG Segment \| Foreign \| Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	[1]	22,658	24,622	36,498
Operating Segments \| PCG Segment \| Foreign \| Other Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	55,851	47,853	63,134
Operating Segments \| Consumer Segment
Segment Reporting Information [Line Items]
Net Sales	[1]	2,295,277	1,945,220	1,858,453
Operating Segments \| Consumer Segment \| Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	1,832,826	1,573,966	1,462,446
Operating Segments \| Consumer Segment \| Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	462,451	371,254	396,007
Operating Segments \| Consumer Segment \| Foreign \| Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	153,631	116,424	117,305
Operating Segments \| Consumer Segment \| Foreign \| Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	257,372	195,783	213,466
Operating Segments \| Consumer Segment \| Foreign \| Latin America
Segment Reporting Information [Line Items]
Net Sales	[1]	31,358	24,909	28,020
Operating Segments \| Consumer Segment \| Foreign \| Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	[1]	20,090	26,432	29,171
Operating Segments \| Consumer Segment \| Foreign \| Other Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]		7,706	8,045
Operating Segments \| SPG Segments
Segment Reporting Information [Line Items]
Net Sales	[1]	705,990	600,968	670,235
Operating Segments \| SPG Segments \| Domestic
Segment Reporting Information [Line Items]
Net Sales	[1]	581,094	489,543	543,429
Operating Segments \| SPG Segments \| Foreign
Segment Reporting Information [Line Items]
Net Sales	[1]	124,896	111,425	126,806
Operating Segments \| SPG Segments \| Foreign \| Canada
Segment Reporting Information [Line Items]
Net Sales	[1]	8,982	8,354	8,908
Operating Segments \| SPG Segments \| Foreign \| Europe
Segment Reporting Information [Line Items]
Net Sales	[1]	82,170	74,162	86,197
Operating Segments \| SPG Segments \| Foreign \| Latin America
Segment Reporting Information [Line Items]
Net Sales	[1]	1,826	1,328	1,397
Operating Segments \| SPG Segments \| Foreign \| Asia Pacific
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 31,918	$ 27,581	$ 30,304

[1]	It is not practicable to obtain the information needed to disclose revenues attributable to each of our product lines.
[2]	Long-lived assets include all non-current assets, excluding non-current deferred income taxes.

Valuation and Qualifying Acco_2

Valuation and Qualifying Accounts and Reserves (Schedule II) (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Accrued Product Liability Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 10,458	$ 11,739	$ 12,900
Additions Charged to Selling, General and Administrative		14,173	5,356	12,696
(Deductions) Additions	[1]	(6,334)	(6,637)	(13,857)
Balance at End of Period		18,297	10,458	11,739
Accrued Environmental Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		1,970	1,147	1,144
Additions Charged to Selling, General and Administrative		1,045	1,168	875
(Deductions) Additions	[1]	(1,686)	(345)	(872)
Balance at End of Period		1,329	1,970	1,147
Accrued Product Liability Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		27,016	29,942	29,902
Additions Charged to Selling, General and Administrative		15,366	15,042	8,301
(Deductions) Additions	[1]	(15,768)	(17,968)	(8,261)
Balance at End of Period		26,614	27,016	29,942
Accrued Environmental Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		4,125	4,211	3,571
Additions Charged to Selling, General and Administrative		1,918	371	895
(Deductions) Additions		224	(457)	(255)
Balance at End of Period		6,267	4,125	4,211
Allowance For Credit Loss Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	[2]	$ 55,847	54,748	46,344
Additions Charged to Selling, General and Administrative	[2]		16,683	18,646
Acquisitions (Disposals) of Businesses and Reclassifications	[2]		(79)	(131)
(Deductions) Additions	[2],[3]		(15,505)	(10,111)
Balance at End of Period	[2]		$ 55,847	$ 54,748

[1]	Primarily claims paid during the year, net of insurance contributions
[2]	Beginning in fiscal 2021, we began presenting a rollforward of our Allowance for Credit Losses in Note Q, "Revenue." See Note Q, “Revenue,” to the Consolidated Financial Statements for further details on fiscal 2021 activity.
[3]	Uncollectible accounts written off, net of recoveries