PPG Industries (PPG) 10-K 17 Feb 22 2021 FY Annual report Financial data

Cover

Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 31, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Entity File Number	1-1687
Entity Registrant Name	PPG INDUSTRIES, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-0730780
Entity Address, Address Line One	One PPG Place
Entity Address, City or Town	Pittsburgh
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15272
City Area Code	412
Local Phone Number	434-3131
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 40,246
Entity Common Stock, Shares Outstanding		235,998,952
Documents Incorporated by Reference	R
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0000079879
Current Fiscal Year End Date	--12-31
Common Stock – Par Value $1.66 2/3
Entity Information [Line Items]
Title of 12(b) Security	Common Stock – Par Value $1.66 2/3
Trading Symbol	PPG
Security Exchange Name	NYSE
0.875% Notes due 2025
Entity Information [Line Items]
Title of 12(b) Security	0.875% Notes due 2025
Trading Symbol	PPG 25
Security Exchange Name	NYSE
1.400% Notes due 2027
Entity Information [Line Items]
Title of 12(b) Security	1.400% Notes due 2027
Trading Symbol	PPG 27
Security Exchange Name	NYSE

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Pittsburgh, Pennsylvania
Auditor Firm ID	238

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 16,802	$ 13,834	$ 15,146
Cost of sales, exclusive of depreciation and amortization	10,286	7,777	8,653
Selling, general and administrative	3,780	3,389	3,604
Depreciation	389	371	375
Amortization	172	138	136
Research and development, net	439	379	432
Interest expense	121	138	132
Interest income	(26)	(23)	(32)
Pension settlement charge	50	0	0
Asbestos-related claims reserve adjustment	(133)	0	12
Impairment charges	21	93	0
Business restructuring, net	31	174	176
Other charges	29	104	86
Other income	(172)	(68)	(89)
Income before income taxes	1,815	1,362	1,661
Income tax expense	374	291	392
Income from continuing operations	1,441	1,071	1,269
Income from discontinued operations, net of tax	19	3	0
Net income attributable to the controlling and noncontrolling interests	1,460	1,074	1,269
Less: Net income attributable to noncontrolling interests	21	15	26
Net income (attributable to PPG)	1,439	1,059	1,243
Income from continuing operations, net of tax	1,420	1,056	1,243
Income from discontinued operations, net of tax	$ 19	$ 3	$ 0
Earnings per common share
Continuing operations (in dollars per share)	$ 5.98	$ 4.46	$ 5.25
Discontinued operations (in dollars per share)	0.08	0.01	0
Net Income (attributable to PPG) (in dollars per share)	6.06	4.47	5.25
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	5.93	4.44	5.22
Discontinued operations (in dollars per share)	0.08	0.01	0
Net Income (attributable to PPG) (in dollars per share)	$ 6.01	$ 4.45	$ 5.22

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income attributable to the controlling and noncontrolling interests	$ 1,460	$ 1,074	$ 1,269
Defined benefit pension and other postretirement benefit adjustments	174	(213)	(156)
Unrealized foreign currency translation adjustments	(330)	(36)	106
Derivative financial instruments			(1)
Other comprehensive loss, net of tax	(156)	(249)	(51)
Total comprehensive income	1,304	825	1,218
Less: amounts attributable to noncontrolling interests:
Net income	(21)	(15)	(26)
Unrealized foreign currency translation adjustments	5		1
Comprehensive income attributable to PPG	$ 1,288	$ 810	$ 1,193

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 1,005	$ 1,826
Short-term investments	67	96
Receivables	3,152	2,726
Inventories	2,171	1,735
Other	379	415
Total current assets	6,774	6,798
Property, plant and equipment, net	3,442	3,127
Goodwill	6,248	5,102
Identifiable intangible assets, net	2,783	2,351
Deferred income taxes	197	379
Investments	274	267
Operating lease, right-of-use asset	891	847
Other assets	742	685
Total	21,351	19,556
Current liabilities
Accounts payable and accrued liabilities	4,392	3,792
Restructuring reserves	173	281
Short-term debt and current portion of long-term debt	9	578
Current portion of operating lease liabilities	192	180
Total current liabilities	4,766	4,831
Long-term debt	6,572	5,171
Operating lease liabilities	693	677
Accrued pensions	834	945
Other postretirement benefits	672	733
Deferred income taxes	646	435
Other liabilities	757	949
Total liabilities	14,940	13,741
Commitments and contingent liabilities (See Note 14)
Shareholders’ equity
Common stock	969	969
Additional paid-in capital	1,081	1,008
Retained earnings	20,372	19,469
Treasury stock, at cost	(13,386)	(13,158)
Accumulated other comprehensive loss	(2,750)	(2,599)
Total PPG shareholders’ equity	6,286	5,689
Noncontrolling interests	125	126
Total shareholders’ equity	6,411	5,815
Total	$ 21,351	$ 19,556

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total PPG	Non-controlling Interests
Beginning balance at Dec. 31, 2018	$ 4,732	$ 969	$ 788	$ 18,131	$ (12,958)	$ (2,300)	$ 4,630	$ 102
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,269			1,243			1,243	26
Other comprehensive loss, net of tax	(51)					(50)	(50)	(1)
Cash dividends	(468)			(468)			(468)
Purchase of treasury stock	(325)				(325)		(325)
Issuance of treasury stock	243		151		92		243
Stock-based compensation activity	10		10				10
Dividends paid on subsidiary common stock to noncontrolling interests	(8)							(8)
Stockholders' Equity, Other	1		1				1
Ending balance at Dec. 31, 2019	5,403	969	950	18,906	(13,191)	(2,350)	5,284	119
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,074			1,059			1,059	15
Other comprehensive loss, net of tax	(249)					(249)	(249)
Cash dividends	(496)			(496)			(496)
Issuance of treasury stock	78		45		33		78
Stock-based compensation activity	13		13				13
Dividends paid on subsidiary common stock to noncontrolling interests	(4)							(4)
Reductions in noncontrolling interests	(4)							(4)
Ending balance at Dec. 31, 2020	5,815	969	1,008	19,469	(13,158)	(2,599)	5,689	126
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the controlling and noncontrolling interests	1,460			1,439			1,439	21
Other comprehensive loss, net of tax	(156)					(151)	(151)	(5)
Cash dividends	(536)			(536)			(536)
Purchase of treasury stock	(250)				(250)		(250)
Issuance of treasury stock	70		48		22		70
Stock-based compensation activity	25		25				25
Dividends paid on subsidiary common stock to noncontrolling interests	(6)							(6)
Reductions in noncontrolling interests	(11)							(11)
Ending balance at Dec. 31, 2021	$ 6,411	$ 969	$ 1,081	$ 20,372	$ (13,386)	$ (2,750)	$ 6,286	$ 125

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities
Net income attributable to the controlling and noncontrolling interests	$ 1,460	$ 1,074	$ 1,269
Income from discontinued operations, net of tax	19	3	0
Income from continuing operations	1,441	1,071	1,269
Adjustments to reconcile net income to cash from operations:
Depreciation and amortization	561	509	511
Pension (income)/expense	(36)	43	54
Pension settlement charge and pension curtailment charge	50	13	0
Asbestos-related claims reserve adjustment	(133)	0	12
Business restructuring, net	31	174	176
Impairment charges	21	93	0
Environmental remediation charges and other costs, net	35	26	61
Stock-based compensation expense	57	44	39
Gain from sale of production facility	(34)	0	0
Deferred income taxes	35	(47)	(5)
Cash contributions to pension plans	(10)	(17)	(13)
Cash used for restructuring actions	(77)	(126)	(58)
Change in certain asset and liability accounts (net of acquisitions):
Receivables	(63)	187	121
Inventories	(279)	111	145
Other current assets	32	49	(95)
Accounts payable and accrued liabilities	295	127	(63)
Noncurrent assets and liabilities, net	(109)	(25)	(25)
Taxes and interest payable	(64)	(108)	(32)
Other	(191)	5	(13)
Cash from operating activities - continuing operations	1,562	2,129	2,084
Cash from/(used for) operating activities - discontinued operations	0	1	(4)
Cash from operating activities	1,562	2,130	2,080
Investing activities
Capital expenditures	(371)	(304)	(413)
Business acquisitions, net of cash balances acquired	(2,137)	(1,169)	(643)
Proceeds from sale of production facility	47	0	0
Other	57	26	47
Cash used for investing activities	(2,404)	(1,447)	(1,009)
Financing activities
Proceeds from Term Loan Credit Agreement, net of fees	1,399	0	0
Proceeds on commercial paper and short-term debt, net of payments	190	1,647	100
Repayment of Term Loan	(400)	(1,100)	0
Proceeds from revolving credit facility	0	800	0
Repayment of revolving credit facility	0	(800)	0
Proceeds from the issuance of debt, net of discounts and fees	692	415	595
Repayment of long-term debt	(850)	(504)	(637)
Repayment of acquired debt	(207)	(13)	(23)
Payments related to tax withholding on stock-based compensation awards	(19)	(17)	(20)
Purchase of treasury stock	(210)	0	(325)
Issuance of treasury stock	47	54	61
Dividends paid on PPG common stock	(536)	(496)	(468)
Purchase of noncontrolling interest	0	0	(39)
Other	(13)	(45)	(2)
Cash from/(used for) financing activities	93	(59)	(758)
Effect of currency exchange rate changes on cash and cash equivalents	(72)	6	1
Cash reclassified to assets held for sale	0	(20)	0
Net (decrease)/increase in cash and cash equivalents	(821)	610	314
Cash and cash equivalents, beginning of year	1,826	1,216	902
Cash and cash equivalents, end of year	1,005	1,826	1,216
Supplemental disclosures of cash flow information:
Interest paid, net of amount capitalized	140	153	127
Taxes paid, net of refunds	491	367	348
Capital expenditures accrued within Accounts payable and accrued liabilities at year-end	163	37	53
Purchases of treasury stock transacted but not yet settled	$ 40	$ 0	$ 0
Reissuance of common stock for business acquisition	0	0	164

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements include the accounts of PPG Industries, Inc. (“PPG” or the “Company”) and all subsidiaries, both U.S. and non-U.S., that it controls. PPG owns more than 50% of the voting stock of most of the subsidiaries that it controls. For those consolidated subsidiaries in which the Company’s ownership is less than 100%, the outside shareholders’ interests are shown as noncontrolling interests. Investments in companies in which PPG owns 20% to 50% of the voting stock and has the ability to exercise significant influence over operating and financial policies of the investee are accounted for using the equity method of accounting. As a result, PPG’s share of income or losses from such equity affiliates is included in the consolidated statement of income and PPG’s share of these companies’ shareholders’ equity is included in Investments on the consolidated balance sheet. Transactions between PPG and its subsidiaries are eliminated in consolidation. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of income and expenses during the reporting period. Such estimates also include the fair value of assets acquired and liabilities assumed resulting from the allocation of the purchase price related to business combinations consummated. Actual outcomes could differ from those estimates. Revenue Recognition Revenue is recognized as performance obligations with the customer are satisfied, at an amount that is determined to be collectible. For the sale of products, this generally occurs at the point in time when control of the Company’s products transfers to the customer based on the agreed upon shipping terms. Shipping and Handling Costs Amounts billed to customers for shipping and handling are reported in Net sales in the consolidated statement of income. Shipping and handling costs incurred by the Company for the delivery of goods to customers are included in Cost of sales, exclusive of depreciation and amortization in the consolidated statement of income. Selling, General and Administrative Costs Amounts presented in Selling, general and administrative in the consolidated statement of income are comprised of selling, customer service, distribution and advertising costs, as well as the costs of providing corporate-wide functional support in areas such as finance, law, human resources and planning. Distribution costs pertain to the movement and storage of finished goods inventory at company-owned and leased warehouses and other distribution facilities. Advertising Costs Advertising costs are charged to expense as incurred and totaled $243 million, $223 million and $283 million in 2021, 2020 and 2019, respectively. Research and Development Research and development costs, which consist primarily of employee-related costs, are charged to expense as incurred. ($ in millions) 2021 2020 2019 Research and development – total $463 $401 $456 Less: depreciation on research facilities 24 22 24 Research and development, net $439 $379 $432 Legal Costs Legal costs, which primarily include costs associated with acquisition and divestiture transactions, general litigation, environmental regulation compliance, patent and trademark protection and other general corporate purposes, are charged to expense as incurred. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to operating losses and tax credit carryforwards as well as differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in Income tax expense in the consolidated statement of income in the period that includes the enactment date. A valuation allowance is provided against deferred tax assets in situations where PPG determines it is more likely than not such assets will not ultimately be realized. PPG does not recognize a tax benefit unless it concludes that it is more likely than not that the benefit will be sustained on audit by the taxing authority based solely on the technical merits of the associated tax position. If the recognition threshold is met, PPG recognizes a tax benefit measured at the largest amount of the tax benefit that, in PPG’s judgment, is greater than 50 percent likely to be realized. PPG records interest and penalties related to uncertain tax positions in Income tax expense in the consolidated statement of income. Foreign Currency Translation The functional currency of most significant non-U.S. operations is their local currency. Assets and liabilities of those operations are translated into U.S. dollars using year-end exchange rates; income and expenses are translated using the average exchange rates for the reporting period. Unrealized foreign currency translation gains and losses are deferred in Accumulated other comprehensive loss on the consolidated balance sheet. Cash Equivalents Cash equivalents are highly liquid investments (valued at cost, which approximates fair value) acquired with an original maturity of three months or less. Short-term Investments Short-term investments are highly liquid, high credit quality investments (valued at cost plus accrued interest) that have stated maturities of greater than three months to less than one year. The purchases and sales of these investments are classified as Investing activities in the consolidated statement of cash flows. Marketable Equity Securities The Company’s investment in marketable equity securities is recorded at fair market value and reported as Other current assets and Investments on the consolidated balance sheet with changes in fair market value recorded in income. Inventories Inventories are stated at the lower of cost or net realizable value. Most U.S. inventories are stated at cost, using the last-in, first-out (“LIFO”) method of accounting, which does not exceed net realizable value. All other inventories are stated at cost, using the first-in, first-out (“FIFO”) method of accounting, which does not exceed net realizable value. PPG determines cost using either average or standard factory costs, which approximate actual costs, excluding certain fixed costs such as depreciation and property taxes. Refer to Note 3, “Working Capital Detail” for further information concerning the Company’s inventory. Derivative Financial Instruments The Company recognizes all derivative financial instruments (a “derivative”) as either assets or liabilities at fair value on the consolidated balance sheet. The accounting for changes in the fair value of a derivative depends on the use of the instrument. For derivative instruments that are designated and qualify as cash flow hedges, the unrealized gains or losses on the derivatives are recorded in the consolidated statement of comprehensive income. Amounts in Accumulated other comprehensive loss on the consolidated balance sheet are reclassified into Income before income taxes in the consolidated statement of income in the same period or periods during which the hedged transactions are recorded in Income before income taxes in the consolidated statement of income. For derivative instruments that are designated and qualify as fair value hedges, the change in the fair value of the derivatives are reported in Income before income taxes in the consolidated statement of income, offsetting the gain or loss recognized for the change in fair value of the asset, liability, or firm commitment that is being hedged. For derivatives, debt or other financial instruments that are designated and qualify as net investment hedges, the gains or losses associated with the financial instruments are reported as translation gains or losses in Accumulated other comprehensive loss on the consolidated balance sheet. Gains and losses in Accumulated other comprehensive loss related to hedges of the Company’s net investments in foreign operations are reclassified out of Accumulated other comprehensive loss and recognized in Income before income taxes in the consolidated statement of income upon a substantial liquidation, sale or partial sale of such investments or upon impairment of all or a portion of such investments. The cash flow impact of these instruments is classified as Investing activities in the consolidated statement of cash flows. Changes in the fair value of derivative instruments not designated as hedges for hedge accounting purposes are recognized in Income before income taxes in the consolidated statement of income in the period of change. Property, Plant and Equipment Property, plant and equipment is recorded at cost. Depreciation is computed on a straight-line method based on the estimated useful lives of related assets. Additional depreciation expense is recorded when facilities or equipment are subject to abnormal economic conditions, restructuring actions or obsolescence. The cost of significant improvements that add to productive capacity or extend the lives of properties are capitalized. Costs for repairs and maintenance are charged to expense as incurred. When a capitalized asset is retired or otherwise disposed of, the original cost and related accumulated depreciation balance are removed from the accounts and any related gain or loss is recorded in Income before income taxes in the consolidated statement of income. The amortization cost of finance lease assets is recorded in Depreciation expense in the consolidated statement of income. Property and other long-lived assets are reviewed for impairment whenever events or circumstances indicate that their carrying amounts may not be recoverable. Refer to Note 4, “Property, Plant and Equipment” for further details. Goodwill and Identifiable Intangible Assets Goodwill represents the excess of the cost over the fair value of acquired identifiable tangible and intangible assets less liabilities assumed from acquired businesses. Identifiable intangible assets acquired in business combinations are recorded based upon their fair value at the date of acquisition. PPG is a multinational manufacturer with 10 operating segments (which the Company refers to as “strategic business units”) that are organized based on the Company’s major products lines. These operating segments are also the Company’s reporting units for purposes of testing goodwill for impairment, which is tested at least annually in connection with PPG’s strategic planning process or more frequently if an indication of impairment exists. The Company tests goodwill for impairment by either performing a qualitative evaluation or a quantitative test. The qualitative evaluation is an assessment of factors, including reporting unit specific operating results as well as industry, market and general economic conditions, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. The Company may elect to bypass this qualitative assessment for some or all of its reporting units and perform a quantitative test. Quantitative goodwill impairment testing, if deemed necessary, is performed during the fourth quarter of each year by comparing the estimated fair value of an associated reporting unit as of September 30 to its carrying value. Fair value is estimated using a discounted cash flow model. Key assumptions and estimates used in the discounted cash flow model include projected future revenues, discount rates, operating cash flows, capital expenditures and tax rates. In 2021, the annual impairment testing review of goodwill did not result in impairment of the Company’s reporting units. The Company has determined that certain acquired trademarks have indefinite useful lives. The Company tests the carrying value of these trademarks for impairment at least annually, or as needed whenever events and circumstances indicate that their carrying amount may not be recoverable. The annual assessment takes place in the fourth quarter of each year either by completing a qualitative assessment or quantitatively by comparing the estimated fair value of each trademark as of September 30 to its carrying value. Fair value is estimated by using the relief from royalty method (a discounted cash flow methodology). The qualitative assessment includes consideration of factors, including revenue relative to the asset being assessed, the operating results of the related business as well as industry, market and general economic conditions, to determine whether it is more likely than not that the fair value of the asset is less than its carrying amount. In 2021, the annual impairment testing review of indefinite-lived intangibles did not result in an impairment. Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives (1 to 30 years) and are reviewed for impairment whenever events or circumstances indicate that their carrying amount may not be recoverable. Receivables and Allowances All trade receivables are reported on the consolidated balance sheet at the outstanding principal adjusted for any allowance for doubtful accounts and any charge offs. The Company provides an allowance for doubtful accounts to reduce receivables to their estimated net realizable value when it is probable that a loss will be incurred. Those estimates are based on historical collection experience, current regional economic and market conditions, the aging of accounts receivable, assessments of current creditworthiness of customers, and forward-looking information. Refer to Note 19, “Revenue Recognition” for further details. Leases The Company determines if a contract is a lease at the inception of the arrangement. The Company reviews all options to extend, terminate, or purchase its right of use assets at the inception of the lease and accounts for these options when they are reasonably certain of being exercised. Certain real estate leases contain lease and non-lease components, which are accounted for separately. For certain equipment leases, lease and non-lease components are accounted for as a single lease component. Leases with an initial term of twelve months or less are not recorded on the consolidated balance sheet. Lease expense for these leases is recognized on a straight-line basis over the lease term. Variable lease expense is based on contractual arrangements with PPG’s lessors determined based on external indices or other relevant market factors. In addition, PPG’s variable lease expense also includes elements of a contract that do not represent a good or service but for which the lessee is responsible for paying. Nearly all of PPG’s lease contracts do not provide a readily determinable implicit rate. For these contracts, PPG’s estimated incremental borrowing rate is based on information available at the inception of the lease. Product Warranties The Company accrues for product warranties at the time the associated products are sold based on historical claims experience. The reserve, pretax charges against income and cash outlays for product warranties were not significant to the consolidated financial statements of the Company for any year presented. Asset Retirement Obligations An asset retirement obligation represents a legal obligation associated with the retirement of a tangible long-lived asset that is incurred upon the acquisition, construction, development or normal operation of that long-lived asset. PPG recognizes asset retirement obligations in the period in which they are incurred if a reasonable estimate of fair value can be made. The asset retirement obligation is subsequently adjusted for changes in fair value. The associated estimated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset and depreciated over its useful life. PPG’s asset retirement obligations are primarily associated with the retirement or closure of certain assets used in PPG’s manufacturing process. The accrued asset retirement obligation is recorded in Accounts payable and accrued liabilities and Other liabilities on the consolidated balance sheet and was $22 million and $21 million as of December 31, 2021 and 2020, respectively. PPG’s only conditional asset retirement obligation relates to the possible future abatement of asbestos contained in certain PPG production facilities. The asbestos in PPG’s production facilities arises from the application of normal and customary building practices in the past when the facilities were constructed. This asbestos is encapsulated in place and, as a result, there is no current legal requirement to abate it. Because there is no requirement to abate, the Company does not have any current plans or an intention to abate and therefore the timing, method and cost of future abatement, if any, are not known. The Company has not recorded an asset retirement obligation associated with asbestos abatement, given the uncertainty concerning the timing of future abatement, if any. Environmental Contingencies It is PPG’s policy to accrue expenses for environmental contingencies when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Reserves for environmental contingencies are exclusive of claims against third parties and are generally not discounted. Assets and Liabilities Held for Sale The Company classifies assets and liabilities as held for sale (a “disposal group”) when management commits to a plan to sell the disposal group, the sale is probable within one year and the disposal group is available for immediate sale in its present condition. The Company considers various factors, particularly whether actions required to complete the plan indicate it is unlikely that significant changes to the plan will be made or the plan will be withdrawn. Assets held for sale are measured at the lower of carrying value or fair value less costs to sell. Any loss resulting from the measurement is recognized in the period the held-for-sale criteria are met. Conversely, gains are not recognized until the date of the sale. When the disposal group is classified as held for sale, depreciation and amortization ceases and the Company tests the assets for impairment. Reclassifications Certain reclassifications of prior years’ data have been made to conform to the current year presentation. These reclassifications had no impact on our previously reported Net income, cash flows or shareholders’ equity. Accounting Standards Adopted in 2021 Effective January 1, 2021, PPG adopted Accounting Standards Update ("ASU") No. 2019-12, "Income Taxes - Simplifying the Accounting for Income Taxes." This ASU is intended to simplify various aspects of accounting for income taxes by eliminating certain exceptions within Accounting Standards Codification Topic 740, "Income Taxes" and to clarify certain aspects of the current accounting guidance. Adoption of this standard did not materially impact PPG's consolidated financial position, results of operations or cash flows. Accounting Standards to be Adopted in Future Years In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-06, “Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40).” This ASU simplifies the accounting for convertible debt instruments by removing certain accounting separation models as well as the accounting for debt instruments with embedded conversion features that are not required to be accounted for as derivative instruments. The ASU also updates and improves the consistency of earnings per share calculations for convertible instruments. The amendments in this ASU are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows. In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform." This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate ("LIBOR"). The amendments in this ASU apply only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued. The amendments in this ASU are effective through December 31, 2022. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows.
Accounting Standard to be Adopted in Future Years	Accounting Standards to be Adopted in Future Years In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-06, “Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40).” This ASU simplifies the accounting for convertible debt instruments by removing certain accounting separation models as well as the accounting for debt instruments with embedded conversion features that are not required to be accounted for as derivative instruments. The ASU also updates and improves the consistency of earnings per share calculations for convertible instruments. The amendments in this ASU are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows. In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform." This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate ("LIBOR"). The amendments in this ASU apply only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued. The amendments in this ASU are effective through December 31, 2022. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows.

Acquisitions and Dispositions

Acquisitions and Dispositions	12 Months Ended
	Dec. 31, 2021
Business Combinations [Abstract]
Acquisitions and Dispositions	Acquisitions and Divestitures Acquisitions Announced Acquisitions On February 7, 2022, PPG announced that it had entered into an agreement to acquire the powder coatings business of Arsonsisi S.p.A., an industrial coatings company based in Milan, Italy. The transaction is expected to close in the first quarter of 2022, subject to customary closing conditions. Completed Acquisitions The pro-forma impact of the following acquisitions on PPG’s sales and results of operations, including the pro-forma effect of events that are directly attributable to each acquisition, was not significant. Tikkurila On June 10, 2021, PPG completed its tender offer for all of the outstanding shares of Tikkurila Oyj ("Tikkurila"). Tikkurila is a leading Nordic producer and distributor of decorative paint and coatings, including an industrial paint business that produces paints and coatings for the wood and metal industries, among others. Immediately prior to the June 10, 2021 acquisition date, PPG owned 9.3% of Tikkurila’s issued and outstanding shares. Immediately following the acquisition date, PPG owned 97.1% of Tikkurila’s issued and outstanding shares. PPG continued to acquire the remaining shares not tendered during the tender offer period through a squeeze out process, ultimately achieving 100% ownership of Tikkurila’s outstanding shares during the fourth quarter of 2021. The Company paid an aggregate purchase price of $1.7 billion, net of cash acquired. The estimated fair value of the major classes of assets acquired and liabilities assumed as reflected in the preliminary purchase price allocation included property, plant and equipment of $199 million, goodwill of $1.1 billion, identifiable intangible assets of $601 million and working capital of $110 million. Working capital represents receivables, inventories and accounts payable and accrued liabilities. The acquired identifiable intangible assets consist of indefinite-lived trademarks of $405 million and other intangible assets with finite lives of $196 million, which consist primarily of customer relationships, trade names, and acquired technology, subject to amortization over a weighted average period of 15 years. Refer to Note 3, “Working Capital Detail” and Note 6, “Goodwill and Other Identifiable Intangible Assets” for additional information. The fair values assigned to assets acquired and liabilities assumed are based on management's best estimates and assumptions as of the reporting date and are considered preliminary. The purchase price was allocated based on information available at the acquisition date and is subject to customary post-closing adjustments. PPG expects to finalize the purchase price allocation with respect to this transaction by the end of the second quarter 2022. For the year ended December 31, 2021, Tikkurila represented approximately 2% of the Company’s consolidated net sales. The results of this business since the date of acquisition have been reported within two operating segments: the architectural coatings – EMEA business and the industrial coatings business. The architectural coatings – EMEA business is included within the Performance Coatings reportable business segment and the industrial coatings business is included within the Industrial Coatings reportable business segment. Wörwag On May 14, 2021, PPG completed the acquisition of Wörwag, a global manufacturer of coatings for industrial and automotive applications. The company specializes in developing sustainable liquid, powder and film coatings. The results of this business since the date of acquisition have been reported within the automotive original equipment manufacturer ("OEM") coatings business within the Industrial Coatings reportable business segment. Cetelon On April 16, 2021, PPG completed the acquisition of Cetelon Lackfabrik GmbH, a manufacturer of coatings for automotive and light truck wheel applications. The results of this business since the date of acquisition have been reported within the automotive OEM coatings business within the Industrial Coatings reportable business segment. VersaFlex On February 19, 2021, PPG completed the acquisition of VersaFlex, a manufacturer specializing in polyurea, epoxy and polyurethane coatings for water and waste water infrastructure, flooring, transportation infrastructure, and industrial applications. The results of this business since the date of acquisition have been reported within the protective and marine coatings business within the Performance Coatings reportable business segment. Ennis-Flint On December 23, 2020, PPG completed the acquisition of Ennis-Flint, a global manufacturer of a broad portfolio of pavement marking products, including traffic paint, hot-applied and preformed thermoplastics, raised pavement markers and intelligent transportation systems. PPG funded this transaction using cash on hand. The results of this business since the date of acquisition have been reported within the traffic solutions business within the Performance Coatings reportable business segment. Alpha Coating Technologies, LLC On March 2, 2020, PPG completed the acquisition of Alpha Coating Technologies, LLC, a manufacturer of powder coatings for light industrial applications and heat sensitive substrates. The results of this business since the date of acquisition have been reported within the industrial coatings business within the Industrial Coatings reportable business segment. Industria Chimica Reggiana On January 31, 2020, PPG completed the acquisition of Industria Chimica Reggiana S.p.A, an Italian manufacturer of automotive refinish products. The results of this business since the date of acquisition have been reported within the automotive refinish coatings business within the Performance Coatings reportable business segment. Texstars, LLC On October 25, 2019, PPG completed the acquisition of Texstars, LLC, a manufacturer of high-performance transparencies, wingtip lenses and plastic components for aerospace and defense vehicles and a leader in advanced transparent coatings. The results of this business since the date of acquisition have been reported within the aerospace coatings business within the Performance Coatings reportable business segment. Dexmet Corporation On August 14, 2019, PPG completed the acquisition of Dexmet Corporation, a specialty materials manufacturer. Dexmet Corporation specializes in customized, highly-engineered, expanded and perforated metal foils and polymers used for structural applications. The results of this business since the date of acquisition have been reported within the aerospace coatings business within the Performance Coatings reportable business segment. Hemmelrath On April 16, 2019, PPG completed the acquisition of Hemmelrath, an automotive coatings manufacturer. Hemmelrath is a global manufacturer of coatings for automotive OEMs. The results of this business since the date of acquisition have been reported within the automotive OEM coatings business within the Industrial Coatings reportable business segment. Whitford Worldwide Company On March 1, 2019, PPG completed the acquisition of Whitford Worldwide Company, a global manufacturer that specializes in low-friction and nonstick coatings for industrial applications and consumer products. The results of this business since the date of acquisition have been reported within the industrial coatings business within the Industrial Coatings reportable business segment. Divestitures In December 2020, PPG committed to a plan to sell certain entities in smaller, non-strategic countries. The revenue of these entities represents less than 1% of PPG annual net sales. The planned sale is expected to occur in early 2022. As a result, the assets and liabilities of these entities were reclassified as held for sale, and Impairment charges of $21 million and $52 million were recorded in the consolidated statement of income for the years ended December 31, 2021 and 2020, respectively, representing the recognition in earnings of the cumulative effect of foreign currency exchange losses previously recorded in equity since acquisition and the excess net book value of the net assets over the anticipated sales proceeds less costs to sell these entities. The assets and liabilities of these entities are reported as held for sale in Other current assets and Accounts payable and accrued liabilities, respectively, on the accompanying consolidated balance sheet as of December 31, 2021 and 2020. The results of these entities are reported within the Performance Coatings reportable business segment. The major classes of assets and liabilities of these entities included in the PPG consolidated balance sheet at December 31, 2021 and 2020 were as follows: ($ in millions) December 31, 2021 December 31, 2020 Cash and cash equivalents $13 $20 Receivables — 5 Inventories — 5 Assets held for sale $13 $30 Accounts payable and accrued liabilities $13 $14 Operating lease liabilities 5 6 Deferred income taxes 2 3 Other liabilities 1 1 Liabilities held for sale $21 $24 Glass Segment

Working Capital Detail

Working Capital Detail	12 Months Ended
	Dec. 31, 2021
Disclosure Components Of Working Capital Detail [Abstract]
Working Capital Detail	Working Capital Detail ($ in millions) 2021 2020 Receivables Trade - net $2,687 $2,412 Other - net 465 314 Total $3,152 $2,726 Inventories (1) Finished products $1,175 $1,021 Work in process 234 187 Raw materials 723 490 Supplies 39 37 Total $2,171 $1,735 Accounts payable and accrued liabilities Trade $2,734 $2,259 Accrued payroll 534 505 Customer rebates 368 320 Other postretirement and pension benefits 87 85 Income taxes 36 46 Other 633 577 Total $4,392 $3,792 (1) Inventories valued using the LIFO method of inventory valuation comprised 29% and 33% of total gross inventory values as of December 31, 2021 and 2020, respectively. If the FIFO method of inventory valuation had been used, inventories would have been $174 million and $110 million higher as of December 31, 2021 and 2020, respectively.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment ($ in millions) Useful Lives (years) 2021 2020 Land and land improvements 1-30 $570 $541 Buildings 20-40 1,769 1,673 Machinery and equipment 5-25 3,949 3,794 Other 3-20 1,177 1,123 Construction in progress 509 345 Total $7,974 $7,476 Less: accumulated depreciation 4,532 4,349 Net $3,442 $3,127

Investments

Investments	12 Months Ended
	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments	Investments ($ in millions) 2021 2020 Investments in equity affiliates $126 $120 Marketable equity securities (See Note 10) 98 97 Other 50 50 Total $274 $267 Investments in equity affiliates represent PPG’s ownership interests in entities between 20% and 50% that manufacture and sell coatings and certain chemicals. PPG’s share of undistributed net earnings of equity affiliates was $15 million, $8 million and $11 million in 2021, 2020 and 2019, respectively. Dividends received from equity affiliates were $9 million, $18 million and $15 million in 2021, 2020 and 2019, respectively.

Goodwill and Other Identifiable

Goodwill and Other Identifiable Intangible Assets	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Identifiable Intangible Assets	Goodwill and Other Identifiable Intangible Assets Goodwill ($ in millions) Performance Coatings Industrial Coatings Total January 1, 2020 $3,442 $1,028 $4,470 Acquisitions, including purchase accounting adjustments 519 15 534 Disposals (5) — (5) Foreign currency impact 67 36 103 December 31, 2020 $4,023 $1,079 $5,102 Acquisitions, including purchase accounting adjustments 1,188 177 1,365 Foreign currency impact (177) (42) (219) December 31, 2021 $5,034 $1,214 $6,248 Identifiable Intangible Assets December 31, 2021 December 31, 2020 ($ in millions) Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Indefinite-Lived Identifiable Intangible Assets Trademarks $1,449 $— $1,449 $1,101 $— $1,101 Definite-Lived Identifiable Intangible Assets Acquired technology $862 ($616) $246 $813 ($585) $228 Customer-related 1,956 (1,064) 892 1,849 (994) 855 Trade names 336 (144) 192 277 (129) 148 Other 51 (47) 4 64 (45) 19 Total Definite Lived Intangible Assets $3,205 ($1,871) $1,334 $3,003 ($1,753) $1,250 Total Identifiable Intangible Assets $4,654 ($1,871) $2,783 $4,104 ($1,753) $2,351 In the fourth quarter, the Company tests the carrying value of indefinite-lived trademarks for impairment, as discussed in Note 1, “Summary of Significant Accounting Policies.” In conjunction with the 2020 assessment, the long-term forecast of net sales for a trademark in the Performance Coatings segment was reduced as a result of historical performance. As a result, the Company recognized a pretax impairment charge of $38 million in Impairment charges in the accompanying consolidated statements of income. In 2021, the annual impairment testing review of indefinite-lived intangibles did not result in an impairment. Aggregate amortization expense was $172 million, $138 million and $136 million in 2021, 2020 and 2019, respectively. ($ in millions) 2022 2023 2024 2025 2026 Estimated future amortization expense $180 $165 $150 $135 $115

Business Restructuring

Business Restructuring	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Business Restructuring	Business Restructuring The Company records restructuring liabilities that represent charges incurred in connection with consolidations of certain operations, including operations from acquisitions, as well as headcount reduction programs. These charges consist primarily of severance costs and certain other cash costs. As a result of these programs, the Company will also incur incremental non-cash accelerated depreciation expense for certain assets due to their reduced expected asset life. These charges are not allocated to the Company’s reportable business segments. Refer to Note 20, “Reportable Business Segment Information” for additional information. In the fourth quarter 2021, the Company approved business restructuring actions related to recent acquisitions targeting further consolidation of our manufacturing footprint and headcount reductions. The majority of these restructuring actions are expected to be completed by the end of 2023. In the second quarter 2020, the Company approved a business restructuring plan which included actions to reduce its global cost structure. The program addressed weakened global economic conditions stemming from COVID-19 and related pace of recovery in a few end-use markets along with further opportunities to optimize supply chain and functional costs. In the second quarter 2019, the Company approved a business restructuring plan which included actions to reduce its global cost structure. The remaining actions of the 2020 and 2019 restructuring programs are expected to be completed in 2022. In the second quarter 2018, the Company approved a business restructuring plan which included actions to reduce its global cost structure. Substantially all actions from this business restructuring plan have been completed. The following table summarizes restructuring reserve activity for the years ended December 31, 2021 and 2020: Total Reserve ($ in millions) 2021 2020 January 1 $293 $224 Approved restructuring actions 54 203 Release of prior reserves and other adjustments (a) (23) (29) Cash payments (77) (126) Foreign currency impact (16) 21 December 31 $231 $293 (a) Certain releases were recorded to reflect the current estimate of costs to complete planned business restructuring actions.

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	Leases PPG leases certain retail paint stores, warehouses, distribution facilities, office space, fleet vehicles and equipment. The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows: ($ in millions) Classification in the Consolidated Statement of Income 2021 2020 2019 Operating lease cost Cost of sales, exclusive of depreciation and amortization $41 $34 $34 Operating lease cost Selling, general and administrative 219 206 198 Total operating lease cost $260 $240 $232 Finance lease cost: Amortization of right-of-use assets Depreciation $2 $2 $2 Interest on lease liabilities Interest expense 1 1 1 Total finance lease cost $3 $3 $3 Total lease cost $263 $243 $235 Total operating lease cost for the years ended December 31, 2021, 2020 and 2019 is inclusive of the following: ($ in millions) 2021 2020 2019 Variable lease costs $18 $17 $15 Short-term lease costs $16 $8 $5 The lease amounts included in the consolidated balance sheet as of December 31, 2021 and 2020 were as follows: ($ in millions) Classification on the Consolidated Balance Sheet 2021 2020 Assets: Operating Operating lease right-of-use assets $891 $847 Finance (1) Property, plant, and equipment, net 13 17 Total leased assets $904 $864 Liabilities: Current Operating Current portion of operating lease liabilities $192 $180 Finance Short-term debt and current portion of long-term debt 3 3 Noncurrent Operating Operating lease liabilities $693 $677 Finance Long-term debt 7 9 Total lease liabilities $895 $869 (1) Net of accumulated depreciation of $13 million as of December 31, 2021 and 2020. Supplemental cash flow information related to leases for the years ended December 31, 2021, 2020 and 2019 was as follows: ($ in millions) 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows paid for operating leases $224 $212 $210 Operating cash flows paid for finance leases $1 $1 $1 Financing cash flows paid for finance leases $3 $2 $4 Right-of-use assets obtained in exchange for lease obligations: Operating leases $253 $227 $219 Finance leases $— $4 $1 Lease terms and discount rates as of December 31, 2021, 2020 and 2019 were as follows: 2021 2020 2019 Weighted-average remaining lease term (in years) Operating leases 7.1 7.4 7.4 Finance leases 6.4 6.1 6.2 Weighted-average discount rate Operating leases 2.1 % 2.4 % 3.0 % Finance leases 5.8 % 7.0 % 9.4 % As of December 31, 2021, maturities of lease liabilities were as follows: ($ in millions) Operating Leases Finance Leases 2022 $210 $3 2023 170 3 2024 133 2 2025 103 1 2026 80 1 Thereafter 262 2 Total lease payments $958 $12 Less: Interest 73 2 Total lease obligations $885 $10
Leases	Leases PPG leases certain retail paint stores, warehouses, distribution facilities, office space, fleet vehicles and equipment. The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows: ($ in millions) Classification in the Consolidated Statement of Income 2021 2020 2019 Operating lease cost Cost of sales, exclusive of depreciation and amortization $41 $34 $34 Operating lease cost Selling, general and administrative 219 206 198 Total operating lease cost $260 $240 $232 Finance lease cost: Amortization of right-of-use assets Depreciation $2 $2 $2 Interest on lease liabilities Interest expense 1 1 1 Total finance lease cost $3 $3 $3 Total lease cost $263 $243 $235 Total operating lease cost for the years ended December 31, 2021, 2020 and 2019 is inclusive of the following: ($ in millions) 2021 2020 2019 Variable lease costs $18 $17 $15 Short-term lease costs $16 $8 $5 The lease amounts included in the consolidated balance sheet as of December 31, 2021 and 2020 were as follows: ($ in millions) Classification on the Consolidated Balance Sheet 2021 2020 Assets: Operating Operating lease right-of-use assets $891 $847 Finance (1) Property, plant, and equipment, net 13 17 Total leased assets $904 $864 Liabilities: Current Operating Current portion of operating lease liabilities $192 $180 Finance Short-term debt and current portion of long-term debt 3 3 Noncurrent Operating Operating lease liabilities $693 $677 Finance Long-term debt 7 9 Total lease liabilities $895 $869 (1) Net of accumulated depreciation of $13 million as of December 31, 2021 and 2020. Supplemental cash flow information related to leases for the years ended December 31, 2021, 2020 and 2019 was as follows: ($ in millions) 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows paid for operating leases $224 $212 $210 Operating cash flows paid for finance leases $1 $1 $1 Financing cash flows paid for finance leases $3 $2 $4 Right-of-use assets obtained in exchange for lease obligations: Operating leases $253 $227 $219 Finance leases $— $4 $1 Lease terms and discount rates as of December 31, 2021, 2020 and 2019 were as follows: 2021 2020 2019 Weighted-average remaining lease term (in years) Operating leases 7.1 7.4 7.4 Finance leases 6.4 6.1 6.2 Weighted-average discount rate Operating leases 2.1 % 2.4 % 3.0 % Finance leases 5.8 % 7.0 % 9.4 % As of December 31, 2021, maturities of lease liabilities were as follows: ($ in millions) Operating Leases Finance Leases 2022 $210 $3 2023 170 3 2024 133 2 2025 103 1 2026 80 1 Thereafter 262 2 Total lease payments $958 $12 Less: Interest 73 2 Total lease obligations $885 $10

Borrowings and Lines of Credit

Borrowings and Lines of Credit	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Borrowings and Lines of Credit	Borrowings and Lines of Credit Long-term Debt Obligations ($ in millions) Maturity Date 2021 2020 9% non-callable debentures ($134) (1) 2021 — 134 0.875% notes (€600) 2022 — 732 3.2% notes ($300) (2) 2023 299 299 Term Loan Credit Agreement, due 2024 ($1,400) 2024 1,399 — 2.4% notes ($300) 2024 298 298 0.875% notes (€600) 2025 677 727 1.200% notes ($700) 2026 692 — 1.4% notes (€600) 2027 677 726 3.75% notes ($800) (3) 2028 811 813 2.5% notes (€80) 2029 90 94 2.8% notes ($300) 2029 298 299 2.55% notes ($300) 2030 296 296 7.70% notes ($176) 2038 174 174 5.5% notes ($250) 2040 247 247 3.0% notes (€120) 2044 130 139 Commercial paper Various 440 250 Various other non-U.S. debt (4) Various 1 38 Finance lease obligations Various 10 12 Impact of derivatives on debt (1)(5) N/A 36 68 Total $6,575 $5,346 Less payments due within one year N/A 3 175 Long-term debt $6,572 $5,171 (1) PPG entered into several interest rate swaps, which were subsequently settled in prior periods. The impact of these settlements was amortized over the life of the debentures as a reduction to interest expense. These interest rate swaps were terminated in 2021. The weighted average interest rate for these borrowings was 8.8% and 8.4% for the years ended December 31, 2021 and 2020, respectively. (2) In February 2018, PPG entered into interest rate swaps which converted $150 million of the notes from a fixed interest rate to a floating interest rate based on the three month London Interbank Offered Rate (LIBOR). The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 0.6% and 1.2% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (3) In February 2018, PPG entered into interest rate swaps which converted $375 million of the notes from a fixed interest rate to a floating interest rate based on the three month LIBOR. The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 1.0% and 1.6% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (4) Weighted average interest rate of 3.1% and 3.8% as of December 31, 2021 and 2020, respectively. (5) Fair value adjustment of the 3.2% $300 million notes and 3.75% $800 million notes as a result of fair value hedge accounting treatment related to the outstanding interest rate swaps as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. Long-term Debt Activities In December 2021, PPG completed an early redemption of the 0.875% notes due March 2022 using cash on hand. In the second quarter of 2021, two of PPG's long-term debt obligations matured; $134 million 9% non-callable debentures and non-U.S. debt of €30 million. The Company paid $170 million to settle these obligations using cash on hand. In March 2021, PPG completed a public offering of $700 million aggregate principal amount of 1.200% notes due 2026. These notes were issued pursuant to PPG’s existing shelf registration statement and pursuant to the Indenture between the Company and the Bank of New York Mellon Trust Company, N.A., as trustee, as supplemented (the "2021 Indenture"). The 2021 Indenture governing these notes contains covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale-leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all the Company’s assets. The terms of these notes also require the Company to make an offer to repurchase the notes upon a Change of Control Triggering Event (as defined in the 2021 Indenture) at a price equal to 101% of their principal amount plus accrued and unpaid interest. The Company may issue additional debt from time to time pursuant to the 2021 Indenture. The aggregate cash proceeds from the notes, net of discounts and fees, was $692 million. In February 2021, PPG entered into a $2.0 billion Term Loan Credit Agreement (the "Term Loan Credit Agreement"). The Term Loan Credit Agreement provided the Company with the ability to borrow up to an aggregate principal amount of $2.0 billion on an unsecured basis prior to December 31, 2021, to be used for working capital and general corporate purposes. The Term Loan Credit Agreement contains covenants that are usual and customary restrictive covenants for facilities of its type, which include, with specified exceptions, limitations on the Company’s ability to create liens or other encumbrances, to enter into sale and leaseback transactions and to enter into consolidations, mergers or transfers of all or substantially all of its assets. The Term Loan Credit Agreement matures and all outstanding borrowings are due and payable on the third anniversary of the date of the initial borrowing under the Agreement. In June 2021, PPG borrowed $700 million under Term Loan Credit Agreement to finance the Company’s acquisition of Tikkurila, and to pay fees, costs and expenses related thereto. In December 2021, PPG borrowed an additional $700 million under the Term Loan Credit Agreement. In August 2020, PPG completed a public offering of $100 million aggregate principal amount of 3.75% notes due March 2028. These notes were issued as additional notes pursuant to PPG’s existing shelf registration statement and pursuant to the Indenture between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee, as supplemented (the "2018 Indenture"), which is is the same Indenture pursuant to which we previously issued $700 million in aggregate principle amount of our 3.75% notes due March 2028 on February 27, 2018. The new notes will be treated as a single series of notes with the existing notes under the 2018 Indenture, have the same CUSIP number as the existing notes, and be fungible with the existing notes for US federal income tax purposes. The Indenture governing these notes contains covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale-leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all the Company’s assets. The terms of these notes also require the Company to make an offer to repurchase the notes upon a Change of Control Triggering Event (as defined in the 2018 Indenture) at a price equal to 101% of their principal amount plus accrued and unpaid interest. The Company may issue additional debt from time to time pursuant to the 2018 Indenture. The aggregate cash proceeds from the notes, including the premium received at issuance, net of fees, was $119 million. In June 2020, PPG completed an early redemption of the $500 million 3.6% notes due November 2020 using proceeds from the May 2020 public offering and cash on hand. The Company recorded a charge of $7 million in the second quarter for the debt redemption which consists of the aggregate make-whole cash premium of $6 million and a balance of unamortized fees and discounts of $1 million related to the debt redeemed. In May 2020, PPG completed a public offering of $300 million aggregate principal amount of 2.55% notes due 2030. These notes were issued pursuant to PPG’s existing shelf registration statement and pursuant to an indenture between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee, as supplemented (the "2020 Indenture"). The 2020 Indenture governing these notes contains covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale-leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all the Company’s assets. The terms of these notes also require the Company to make an offer to repurchase the notes upon a Change of Control Triggering Event (as defined in the 2020 Indenture) at a price equal to 101% of their principal amount plus accrued and unpaid interest. The Company may issue additional debt from time to time pursuant to the 2020 Indenture. The aggregate cash proceeds from the notes, net of discounts and fees, was $296 million. In April 2020, PPG entered into a $1.5 billion 364-Day Term Loan Credit Agreement (the “Term Loan”). The Term Loan contains covenants that are consistent with those in the Credit Agreement discussed below and that are usual and customary restrictive covenants for facilities of its type, which include, with specified exceptions, limitations on the Company’s ability to create liens or other encumbrances, to enter into sale and leaseback transactions and to enter into consolidations, mergers or transfers of all or substantially all of its assets. In 2020, PPG repaid $1.1 billion of the Term Loan using cash on hand. In the first quarter 2021, PPG repaid the remaining $400 million of the Term Loan using cash on hand. The Term Loan terminated on April 13, 2021. In August 2019, PPG completed a public offering of $300 million aggregate principal amount of 2.4% notes due 2024 and $300 million aggregate principal amount of 2.8% notes due 2029. These notes were issued pursuant to PPG’s existing shelf registration statement and pursuant to an indenture between the Company and The Bank of New York Mellon Trust Company, N.A., as trustee, as supplemented (the "2019 Indenture"). The 2019 Indenture governing these notes contains covenants that limit the Company’s ability to, among other things, incur certain liens securing indebtedness, engage in certain sale-leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all the Company’s assets. The terms of these notes also require the Company to make an offer to repurchase the notes upon a Change of Control Triggering Event (as defined in the 2019 Indenture) at a price equal to 101% of their principal amount plus accrued and unpaid interest. The Company may issue additional debt from time to time pursuant to the 2019 Indenture. The aggregate cash proceeds from the notes, net of discounts and fees, was $595 million. In November 2019, PPG’s €300 million 0.00% notes and $300 million 2.3% notes matured, upon which the Company paid $634 million to settle these obligations. Credit agreements In August 2019, PPG amended and restated its five Borrowings under the Credit Agreement may be made in U.S. Dollars or in euros. The Credit Agreement provides that loans will bear interest at rates based, at the Company’s option, on one of two specified base rates plus a margin based on certain formulas defined in the Credit Agreement. Additionally, the Credit Agreement contains a Commitment Fee, as defined in the Credit Agreement, on the amount of unused commitments under the Credit Agreement ranging from 0.060% to 0.125% per annum. The Credit Agreement also supports the Company’s commercial paper borrowings which are classified as long-term based on PPG’s intent and ability to refinance these borrowings on a long-term basis. Commercial paper borrowings of $440 million and $250 million were outstanding as of December 31, 2021 and December 31, 2020, respectively. The Credit Agreement contains usual and customary restrictive covenants for facilities of its type, which include, with specified exceptions, limitations on the Company’s ability to create liens or other encumbrances, to enter into sale and leaseback transactions and to enter into consolidations, mergers or transfers of all or substantially all of its assets. The Credit Agreement also requires the Company to maintain a ratio of Total Indebtedness to Total Capitalization, as defined in the Credit Agreement, of 60% or less; provided, that for any fiscal quarter in which the Company has made an acquisition for consideration in excess of $1 billion and for the next five fiscal quarters thereafter, the ratio of Total Indebtedness to Total Capitalization may not exceed 65% at any time. As of December 31, 2021, Total Indebtedness to Total Capitalization as defined under the Credit Agreement was 48%. The Credit Agreement contains, among other things, customary events of default that would permit the lenders to accelerate the loans, including the failure to make timely payments when due under the Credit Agreement or other material indebtedness, the failure to satisfy covenants contained in the Credit Agreement, a change in control of the Company and specified events of bankruptcy and insolvency. Restrictive Covenants and Cross-Default Provisions As of December 31, 2021, PPG was in full compliance with the restrictive covenants under its various credit agreements, loan agreements and indentures. Additionally, the Company’s Credit Agreement contains customary cross-default provisions. These provisions provide that a default on a debt service payment of $50 million or more for longer than the grace period provided under another agreement may result in an event of default under this agreement. None of the Company’s primary debt obligations are secured or guaranteed by the Company’s affiliates. Long-term Debt Maturities ($ in millions) Maturity per year 2022 $3 2023 $301 2024 $2,136 2025 $679 2026 $699 Thereafter $2,757 Short-term Debt Obligations ($ in millions) 2021 2020 Various, weighted average 0.7% and 1.7% as of December 31, 2021 and 2020, respectively. $6 $403 Lines of Credit, Letters of Credit and Surety Bonds PPG’s non-U.S. operations have uncommitted lines of credit totaling $492 million of which $9 million was used as of December 31, 2021. These uncommitted lines of credit are subject to cancellation at any time and are generally not subject to any commitment fees. The Company had outstanding letters of credit and surety bonds of $173 million and $134 million as of December 31, 2021 and 2020, respectively. The letters of credit secure the Company’s performance to third parties under certain self-insurance programs and other commitments made in the ordinary course of business. The Company does not believe any loss related to these letters of credit or surety bonds is likely.

Financial Instruments, Hedging

Financial Instruments, Hedging Activities and Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments, Hedging Activities and Fair Value Measurements	Financial Instruments, Hedging Activities and Fair Value Measurements Financial instruments include cash and cash equivalents, short-term investments, cash held in escrow, marketable equity securities, accounts receivable, company-owned life insurance, accounts payable, short-term and long-term debt instruments, and derivatives. The fair values of these financial instruments approximated their carrying values at December 31, 2021 and 2020, in the aggregate, except for long-term debt instruments. Hedging Activities The Company has exposure to market risk from changes in foreign currency exchange rates and interest rates. As a result, financial instruments, including derivatives, have been used to hedge a portion of these underlying economic exposures. Certain of these instruments qualify as fair value, cash flow, and net investment hedges upon meeting the requisite criteria, including effectiveness of offsetting hedged or underlying exposures. Changes in the fair value of derivatives that do not qualify for hedge accounting are recognized in Income before income taxes in the period incurred. PPG’s policies do not permit speculative use of derivative financial instruments. PPG enters into derivative financial instruments with high credit quality counterparties and diversifies its positions among such counterparties in order to reduce its exposure to credit losses. The Company did not realize a credit loss on derivatives during the three-year period ended December 31, 2021. All of PPG’s outstanding derivative instruments are subject to accelerated settlement in the event of PPG’s failure to meet its debt or payment obligations under the terms of the instruments’ contractual provisions. In addition, if the Company would be acquired and its payment obligations under its derivative instruments’ contractual arrangements are not assumed by the acquirer, or if PPG would enter into bankruptcy, receivership or reorganization proceedings, its outstanding derivative instruments would also be subject to accelerated settlement. In 2021 and 2020, there were no derivative instruments de-designated or discontinued as a hedging instrument. There were no gains or losses deferred in Accumulated other comprehensive loss on the consolidated balance sheet that were reclassified to Income before income taxes in the consolidated statement of income during the three-year period ended December 31, 2021 related to hedges of anticipated transactions that were no longer expected to occur. Fair Value Hedges The Company uses interest rate swaps from time to time to manage its exposure to changing interest rates. When outstanding, the interest rate swaps are typically designated as fair value hedges of certain outstanding debt obligations of the Company and are recorded at fair value. In February 2018, PPG entered into interest rate swaps which converted $525 million of fixed rate debt to variable rate debt. The swaps are designated as fair value hedges and are carried at fair value. Changes in the fair value of these swaps and changes in the fair value of the related debt are recorded in Interest expense in the accompanying consolidated statement of income. The fair value of these interest rate swaps was an asset of $36 million and $67 million at December 31, 2021 and 2020, respectively. Cash Flow Hedges At times, PPG designates certain foreign currency forward contracts as cash flow hedges of the Company’s exposure to variability in exchange rates on third party transactions denominated in foreign currencies. There were no outstanding cash flow hedges at December 31, 2021 and December 31, 2020, respectively. Net Investment Hedges PPG uses cross currency swaps and foreign currency euro-denominated debt to hedge a significant portion of its net investment in its European operations, as follows: As of December 31, 2021 and December 31, 2020, PPG had U.S. dollar to euro cross currency swap contracts with total notional amounts of $775 million and $875 million, respectively, and designated these contracts as hedges of the Company's net investment in its European operations. During the term of these contracts, PPG will receive payment in U.S. dollars and make payments in euros to the counterparties. As of December 31, 2021 and 2020, the fair value of these contracts was a net asset of $50 million and a net liability of $8 million, respectively. At December 31, 2021 and 2020, PPG had designated €1.4 billion and €2.0 billion, respectively, of euro-denominated borrowings as hedges of a portion of its net investment in the Company’s European operations. The carrying value of these instruments at December 31, 2021 and 2020 was $1.6 billion and $2.4 billion, respectively. There were no foreign currency forward contracts designated as net investment hedges used or outstanding as of and for the periods ended December 31, 2021, 2020 and 2019. Other Financial Instruments PPG uses foreign currency forward contracts to manage net transaction exposures that do not qualify for hedge accounting; therefore, the change in the fair value of these instruments is recorded in Other charges in the consolidated statement of income in the period of change. Underlying notional amounts related to these foreign currency forward contracts were $1.9 billion and $1.4 billion at December 31, 2021 and 2020, respectively. As of December 31, 2021 and 2020, the fair values of these contracts were net assets of $24 million and $2 million, respectively. Gains/Losses Deferred in Accumulated Other Comprehensive losses As of December 31, 2021 and 2020, the Company had accumulated pretax unrealized translation gains and losses in Accumulated other comprehensive loss on the consolidated balance sheet related to the euro-denominated borrowings, foreign currency forward contracts, and the cross currency swaps of $204 million and $22 million, respectively. The following table summarizes the location within the consolidated financial statements and amount of gains/(losses) related to derivative and debt financial instruments for the years ended December 31, 2021, 2020 and 2019. All dollar amounts are shown on a pretax basis. 2021 2020 2019 Caption in Consolidated Statement of Income ($ in millions) Gain Deferred in AOCL Gain Recognized Loss Deferred in AOCL Gain Recognized Gain Deferred in AOCL Gain/(Loss) Recognized Fair Value Interest rate swaps $15 $12 $3 Interest expense Total Fair Value $15 $12 $3 Cash Flow Foreign currency forward contracts $— $— $— $— $2 ($3) Other charges and Cost of sales Total Cash Flow $— $— $— $— $2 ($3) Net Investment Cross currency swaps $53 $13 ($57) $16 $13 $18 Interest expense Foreign denominated debt 173 — (200) — 61 — Total Net Investment $226 $13 ($257) $16 $74 $18 Economic Foreign currency forward contracts $23 $30 $55 Other charges Fair Value Measurements The Company follows a fair value measurement hierarchy to measure its assets and liabilities. As of December 31, 2021 and 2020, respectively, the assets and liabilities measured at fair value on a recurring basis were cash equivalents, equity securities and derivatives. In addition, the Company measures its pension plan assets at fair value (see Note 13, “Employee Benefit Plans” for further details). The Company’s financial assets and liabilities are measured using inputs from the following three levels: Level 1 inputs are quoted prices in active markets for identical assets and liabilities that the Company has the ability to access at the measurement date. Level 1 inputs are considered to be the most reliable evidence of fair value as they are based on unadjusted quoted market prices from various financial information service providers and securities exchanges. Level 2 inputs are directly or indirectly observable prices that are not quoted on active exchanges, which include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means. The fair values of the derivative instruments reflect the instruments’ contractual terms, including the period to maturity, and uses observable market-based inputs, including forward curves. Level 3 inputs are unobservable inputs employed for measuring the fair value of assets or liabilities. The Company does not have any recurring financial assets or liabilities that are recorded in its consolidated balance sheets as of December 31, 2021 and 2020 that are classified as Level 3 inputs. Assets and liabilities reported at fair value on a recurring basis December 31, 2021 December 31, 2020 ($ in millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Other current assets: Marketable equity securities $6 $— $— $6 $— $— Foreign currency forward contracts (a) — 28 — — 8 — Other assets: Cross currency swaps (b) $— $50 $— $— $13 $— Interest rate swaps (c) — 36 — — 67 — Investments: Marketable equity securities $98 $— $— $97 $— $— Liabilities: Accounts payable and accrued liabilities: Foreign currency forward contracts (a) $— $4 $— $— $6 $— Cross currency swaps (b) — — — — 8 — Other liabilities: Cross currency swap (b) $— $— $— $— $13 $— (a) Derivatives not designated as hedging instruments (b) Net investment hedges (c) Fair value hedges Long-Term Debt ($ in millions) December 31, 2021 (a) December 31, 2020 (b) Long-term debt - carrying value $6,565 $5,334 Long-term debt - fair value $6,958 $5,913 (a) Excluding finance lease obligations of $10 million and short term borrowings of $6 million as of December 31, 2021. (b) Excluding finance lease obligations of $12 million and short term borrowings of $403 million as of December 31, 2020. The fair values of the debt instruments were based on discounted cash flows and interest rates then currently available to the Company for instruments of the same remaining maturities and were measured using level 2 inputs. Call and put option on noncontrolling interest

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share ($ in millions, except per share amounts) 2021 2020 2019 Earnings per common share (attributable to PPG) Income from continuing operations, net of tax $1,420 $1,056 $1,243 Income from discontinued operations, net of tax 19 3 — Net income (attributable to PPG) $1,439 $1,059 $1,243 Weighted average common shares outstanding 237.6 236.8 236.9 Effect of dilutive securities: Stock options 1.0 0.4 0.6 Other stock compensation plans 0.8 0.7 0.7 Potentially dilutive common shares 1.8 1.1 1.3 Adjusted weighted average common shares outstanding 239.4 237.9 238.2 Earnings per common share (attributable to PPG) Income from continuing operations, net of tax $5.98 $4.46 $5.25 Income from discontinued operations, net of tax 0.08 0.01 — Net income (attributable to PPG) $6.06 $4.47 $5.25 Earnings per common share - assuming dilution (attributable to PPG) Income from continuing operations, net of tax $5.93 $4.44 $5.22 Income from discontinued operations, net of tax 0.08 0.01 — Net income (attributable to PPG) $6.01 $4.45 $5.22 Excluded from the computation of earnings per diluted share due to their antidilutive effect were zero, 1.4 million, and 0.9 million outstanding stock options in 2021, 2020 and 2019, respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The provision for income taxes by taxing jurisdiction and by significant components consisted of the following: ($ in millions) 2021 2020 2019 Current U.S. federal $25 $12 $86 U.S. state and local 13 6 15 Foreign 301 320 296 Total current income tax expense $339 $338 $397 Deferred U.S. federal $12 $1 ($1) U.S. state and local 3 (3) 13 Foreign 20 (45) (17) Total deferred income tax expense/(benefit) $35 ($47) ($5) Total income tax expense $374 $291 $392 A reconciliation of the statutory U.S. corporate federal income tax rate to the Company’s effective tax rate follows: 2021 2020 2019 U.S. federal income tax rate 21.0 % 21.0 % 21.0 % Changes in rate due to: Taxes on non-U.S. earnings 2.7 3.3 2.9 U.S. state and local taxes 0.8 0.3 1.3 U.S. tax (benefit)/cost on foreign dividends (1.6) 0.1 (0.9) Tax benefits from equity awards (0.3) (0.4) — Change in valuation allowance reserves — (1.4) — U.S. tax incentives (0.6) (0.9) (0.7) U.S. tax cost - Tax Cuts & Jobs Act — — 0.3 Uncertain tax positions (1.4) 0.9 0.3 Other — (1.5) (0.6) Effective income tax rate 20.6 % 21.4 % 23.6 % In 2021, the effective income tax rate included a net benefit of $66 million primarily driven by foreign tax credits, releases of reserves for uncertain tax positions and research and development credits. In 2020, the effective income tax rate included a net benefit of $30 million for changes in valuation allowance reserves and for U.S. research and development credits, as well as other credits. In 2019, the effective income tax rate included a net benefit of $22 million driven by Global Intangible Low-Taxed Income, foreign derived intangible income deductions, foreign tax credits and research and development credits. Income before income taxes of the Company’s U.S. operations for 2021, 2020 and 2019 was $469 million, $190 million and $596 million, respectively. Income before income taxes of the Company’s foreign operations for 2021, 2020 and 2019 was $1,346 million, $1,172 million and $1,065 million, respectively. Deferred income taxes Deferred income taxes are provided for the effect of temporary differences that arise because there are certain items treated differently for financial accounting than for income tax reporting purposes. The deferred tax assets and liabilities are determined by applying the enacted tax rate in the year in which the temporary difference is expected to reverse. ($ in millions) 2021 2020 Deferred income tax assets related to Employee benefits $386 $439 Contingent and accrued liabilities 74 118 Operating loss and other carry-forwards 278 293 Operating lease liabilities 215 209 Research and development amortization 68 — Other 121 197 Valuation allowance (172) (167) Total $970 $1,089 Deferred income tax liabilities related to Property $278 $240 Intangibles 814 663 Employee benefits 75 37 Operating lease right-of-use assets 216 206 Other 36 16 Total $1,419 $1,162 Deferred income tax liabilities – net ($449) ($73) Net operating loss and credit carryforwards ($ in millions) 2021 2020 Expiration Available net operating loss carryforwards, tax effected: Indefinite expiration $106 $113 NA Definite expiration 77 80 2022-2041 Total $183 $193 Income tax credit carryforwards $115 $119 2022-2041 A valuation allowance of $172 million and $167 million has been established for carry-forwards and certain other items at December 31, 2021 and 2020, respectively, when the ability to utilize them is not likely. Undistributed foreign earnings The Company had $4.3 billion and $4.1 billion of undistributed earnings of non-U.S. subsidiaries as of December 31, 2021 and 2020, respectively. These amounts relate to approximately 280 subsidiaries in approximately 80 taxable jurisdictions. The Company estimates repatriation of undistributed earnings of non-U.S. subsidiaries as of December 31, 2021 and 2020 would have resulted in a tax cost of $39 million and $40 million, respectively. As of December 31, 2021, the Company has not changed its intention to reinvest foreign earnings indefinitely or repatriate when it is tax effective to do so, and as such, has not established a liability for foreign withholding taxes or other costs that would be incurred if the earnings were repatriated. Unrecognized tax benefits The Company files federal, state and local income tax returns in numerous domestic and foreign jurisdictions. In most tax jurisdictions, returns are subject to examination by the relevant tax authorities for a number of years after the returns have been filed. The Company is no longer subject to examinations by tax authorities in any major tax jurisdiction for years before 2008. Additionally, the Company is no longer subject to examination by the Internal Revenue Service for U.S. federal income tax returns filed for years through 2016. The examinations of the Company’s U.S. federal income tax returns for 2017 through 2018 are currently underway. A reconciliation of the total amounts of unrecognized tax benefits (excluding interest and penalties) as of December 31 follows: ($ in millions) 2021 2020 2019 January 1 $175 $167 $166 Current year tax positions - additions 12 25 25 Prior year tax positions - additions 10 5 4 Prior year tax positions - reductions (2) (2) (9) Statute of limitations expirations (19) (8) (6) Settlements (21) (11) (12) Foreign currency translation 3 (1) (1) December 31 $158 $175 $167 The Company expects that any reasonably possible change in the amount of unrecognized tax benefits in the next 12 months would not be significant. The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate was $132 million as of December 31, 2021. Interest and penalties ($ in millions) 2021 2020 2019 Accrued interest and penalties related to unrecognized tax benefits $17 $18 $17 (Income)/loss recognized in income tax expense related to interest and penalties ($2) $2 $1 The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Defined Benefit Plans PPG has defined benefit pension plans that cover certain employees worldwide. The principal defined benefit pension plans are those in the U.S., Canada, the Netherlands and the U.K. These plans in the aggregate represent approximately 91% of PPG’s total projected benefit obligation at December 31, 2021, of which the U.S. defined benefit pension plans represent the largest component. As of December 31, 2020, the Company’s U.S. and Canadian defined benefit plans were frozen for all participants. The Company plans to continue reviewing and potentially amending PPG defined benefit plans in the future. Canadian pension annuity contracts In December 2021, the Company purchased group annuity contracts that transferred pension benefit obligations for certain of the Company’s retirees in Canada who were receiving their monthly retirement benefit payments from the Canadian pension plans to a third-party insurance company. The amount of each affected retiree’s annuity payment is equal to the amount of such individual’s pension benefit. The purchase of group annuity contracts was funded directly by the assets of the Canadian plans. By transferring the obligations and assets to the insurance company, the Company reduced its overall pension projected benefit obligation by approximately $175 million and recognized a non-cash pension settlement charge of $50 million. Postretirement medical PPG sponsors welfare benefit plans that provide postretirement medical and life insurance benefits for certain U.S. and Canadian employees and their dependents of which the U.S. welfare benefit plans represent approximately 87% of PPG’s total projected benefit obligation at December 31, 2021. Salaried and certain hourly employees in the U.S. hired on or after October 1, 2004, or rehired on or after October 1, 2012 are not eligible for postretirement medical benefits. These plans in the U.S. and Canada require retiree contributions based on retiree-selected coverage levels for certain retirees and their dependents and provide for sharing of future benefit cost increases between PPG and participants based on management discretion. The Company has the right to modify, amend or terminate certain of these benefit plans in the future. Effective January 1, 2017, the Company-sponsored Medicare-eligible plans were replaced by a Medicare private exchange. The announcement of this plan design change triggered a remeasurement of PPG’s retiree medical benefit obligation using prevailing interest rates. The plan design change resulted in a $306 million reduction in the Company's postretirement benefit obligation. PPG accounted for the plan design change prospectively, and the impact will be amortized to periodic postretirement benefit cost over a 5.6 year period through mid-2022. The following table sets forth the changes in projected benefit obligations (“PBO”), plan assets, the funded status and the amounts recognized on the accompanying consolidated balance sheet for the Company’s defined benefit pension and other postretirement benefit plans: Defined Benefit Pension Plans United States International Total PPG ($ in millions) 2021 2020 2021 2020 2021 2020 Projected benefit obligation, January 1 $2,042 $1,842 $1,933 $1,719 $3,975 $3,561 Service cost — 13 9 11 9 24 Interest cost 39 54 26 33 65 87 Actuarial (gains)/losses - net (72) 251 (91) 165 (163) 416 Benefits paid (89) (133) (60) (60) (149) (193) Acquisitions — — 48 — 48 — Foreign currency translation adjustments — — (51) 87 (51) 87 Settlements and curtailments — 13 (198) (19) (198) (6) Other — 2 (2) (3) (2) (1) Projected benefit obligation, December 31 $1,920 $2,042 $1,614 $1,933 $3,534 $3,975 Market value of plan assets, January 1 $1,335 $1,304 $1,881 $1,661 $3,216 $2,965 Actual return on plan assets 66 144 42 198 108 342 Company contributions — — 10 17 10 17 Benefits paid (72) (113) (51) (51) (123) (164) Acquisitions — — 3 — 3 — Plan settlements — — (198) (19) (198) (19) Foreign currency translation adjustments — — (38) 78 (38) 78 Other — — (3) (3) (3) (3) Market value of plan assets, December 31 $1,329 $1,335 $1,646 $1,881 $2,975 $3,216 Funded Status ($591) ($707) $32 ($52) ($559) ($759) Amounts recognized in the Consolidated Balance Sheet: Other assets (long-term) — — 310 218 310 218 Accounts payable and accrued liabilities (23) (23) (12) (9) (35) (32) Accrued pensions (568) (684) (266) (261) (834) (945) Net (liability)/asset recognized ($591) ($707) $32 ($52) ($559) ($759) Other Postretirement Benefit Plans United States International Total PPG ($ in millions) 2021 2020 2021 2020 2021 2020 Projected benefit obligation, January 1 $682 $616 $104 $96 $786 $712 Service cost 11 9 1 1 12 10 Interest cost 12 17 2 3 14 20 Plan amendments — 4 — — — 4 Actuarial (gains)/losses - net (33) 75 (10) 7 (43) 82 Benefits paid (41) (39) (4) (5) (45) (44) Foreign currency translation adjustments — — — 2 — 2 Projected benefit obligation, December 31 $631 $682 $93 $104 $724 $786 Amounts recognized in the Consolidated Balance Sheet: Accounts payable and accrued liabilities (47) (48) (5) (5) (52) (53) Other postretirement benefits (584) (634) (88) (99) (672) (733) Net liability recognized ($631) ($682) ($93) ($104) ($724) ($786) The PBO is the actuarial present value of benefits attributable to employee service rendered to date, including the effects of estimated future pay increases. The accumulated benefit obligation (“ABO”) is the actuarial present value of benefits attributable to employee service rendered to date, but does not include the effects of estimated future pay increases. The ABO for all defined benefit pension plans as of December 31, 2021 and 2020 was $3.5 billion and $3.8 billion, respectively. The following table details the pension plans where the benefit liability exceeds the fair value of the plan assets: Pensions ($ in millions) 2021 2020 Plans with PBO in Excess of Plan Assets: Projected benefit obligation $2,232 $2,478 Fair value of plan assets $1,366 $1,504 Plans with ABO in Excess of Plan Assets: Accumulated benefit obligation $2,197 $2,320 Fair value of plan assets $1,362 $1,383 Net actuarial losses and prior service cost/(credit) deferred in accumulated other comprehensive loss Pensions Other Postretirement Benefits ($ in millions) 2021 2020 2021 2020 Accumulated net actuarial losses $857 $1,071 $170 $233 Accumulated prior service cost/(credit) 5 4 (21) (75) Total $862 $1,075 $149 $158 The accumulated net actuarial losses for pensions and other postretirement benefits relate primarily to historical declines in the discount rates. The accumulated net actuarial losses exceeded 10% of the higher of the market value of plan assets or the PBO at the beginning of each of the last three years; therefore, amortization of such excess has been included in net periodic benefit costs for pension and other postretirement benefits in these periods. The amortization period is the average remaining service period of active employees expected to receive benefits unless a plan is mostly inactive in which case the amortization period is the average remaining life expectancy of the plan participants. Accumulated prior service cost (credit) is amortized over the future service periods of those employees who are active at the dates of the plan amendments and who are expected to receive benefits. The net decrease in Accumulated other comprehensive loss (pretax) in 2021 relating to defined benefit pension and other postretirement benefits is primarily attributable to pension and other postretirement plan discount rate increases, as follows: ($ in millions) Pensions Other Postretirement Benefits Net actuarial gain arising during the year ($119) ($43) New prior service cost 1 — Amortization of actuarial loss (39) (20) Amortization of prior service credit — 54 Foreign currency translation adjustments (3) — Impact of settlements (53) — Net decrease ($213) ($9) The 2021 net actuarial gain related to the Company’s pension and other postretirement benefit plans was primarily due to an increase in the weighted average discount rate used to determine the benefit obligation at December 31, 2021. Net periodic benefit cost Pensions Other Postretirement Benefits ($ in millions) 2021 2020 2019 2021 2020 2019 Service cost $9 $24 $23 $12 $10 $8 Interest cost 65 87 105 14 20 26 Expected return on plan assets (152) (144) (139) — — — Amortization of prior service credit — — — (54) (59) (57) Amortization of actuarial losses 39 71 62 20 15 8 Settlements, curtailments, and special termination benefits 53 18 3 — — — Net periodic benefit cost/(income) $14 $56 $54 ($8) ($14) ($15) Service cost for net periodic pension and other postretirement benefit costs is included in Cost of sales, exclusive of depreciation and amortization, Selling, general and administrative, and Research and development, net in the accompanying consolidated statements of income. Except for the Canadian pension settlement charge in 2021, all other components of net periodic benefit cost are recorded in Other charges in the accompanying consolidated statements of income. Key assumptions The following weighted average assumptions were used to determine the benefit obligation for the Company’s defined benefit pension and other postretirement plans as of December 31, 2021 and 2020: United States International Total PPG 2021 2020 2021 2020 2021 2020 Discount rate 2.8 % 2.4 % 2.0 % 1.6 % 2.5 % 2.1 % Rate of compensation increase 2.5 % 2.5 % 2.8 % 1.1 % 2.6 % 1.5 % The following weighted average assumptions were used to determine the net periodic benefit cost for the Company’s defined benefit pension and other postretirement benefit plans for the three years in the period ended December 31, 2021: 2021 2020 2019 Discount rate 2.1 % 2.8 % 3.7 % Expected return on assets 4.8 % 5.0 % 5.4 % Rate of compensation increase 1.5 % 2.6 % 1.8 % These assumptions for each plan are reviewed on an annual basis. In determining the expected return on plan asset assumption, the Company evaluates the mix of investments that comprise each plan’s assets and external forecasts of future long-term investment returns. The Company compares the expected return on plan assets assumption to actual historic returns to ensure reasonability. For 2021, the return on plan assets assumption for PPG’s U.S. defined benefit pension plans was 7.4%. A change in the rate of return of 100 basis points, with other assumptions held constant, would impact 2022 net periodic pension expense by $13 million. The global expected return on plan assets assumption to be used in determining 2022 net periodic pension expense will be 5.0% (7.4% for the U.S. plans only). The discount rates used in accounting for pension and other postretirement benefits are determined using a yield curve constructed of high-quality fixed-income securities as of the measurement date and using the plans’ projected benefit payments. The Company has elected to use a full yield curve approach in the estimation of the service and interest cost components of net periodic pension benefit cost (income) for countries with significant pension plans. The full yield curve approach (also known as the split-rate or spot-rate method) allows the Company to align the applicable discount rates with the cost of additional service being earned and the interest being accrued on these obligations. A change in the discount rate of 100 basis points, with all other assumptions held constant, would impact 2022 net periodic benefit expense for our defined benefit pension and other postretirement benefit plans by $2 million and $6 million, respectively. The weighted-average health care cost trend rate (inflation) used for 2021 was 5.1% declining to a projected 4.2% in the year 2040. For 2022, the assumed weighted-average health care cost trend rate used will be 5.4% declining to a projected 4.0% between 2022 and 2040 for medical and prescription drug costs, respectively. These assumptions are reviewed on an annual basis. In selecting rates for current and long-term health care cost assumptions, the Company takes into consideration a number of factors, including the Company’s actual health care cost increases, the design of the Company’s benefit programs, the demographics of the Company’s active and retiree populations and external expectations of future medical cost inflation rates. Contributions to defined benefit pension plans ($ in millions) 2021 2020 2019 Non-U.S. defined benefit pension plans $10 $17 $13 Contributions made to PPG’s non-U.S. defined benefit pension plans in 2021 and 2020 were required by local funding requirements. PPG expects to make contributions to its defined benefit pension plans in the range of $10 million to $20 million in 2022. PPG may make voluntary contributions to its defined benefit pension plans in 2022 and beyond. Benefit payments The estimated benefits expected to be paid under the Company’s defined benefit pension and other postretirement benefit plans are: ($ in millions) Pensions Other Postretirement Benefits 2022 $155 $52 2023 $154 $50 2024 $158 $49 2025 $161 $48 2026 $162 $44 2027 to 2031 $839 $204 U.S. Qualified Pension Occasionally, the Company offers a lump sum payout option that gives certain terminated vested participants in certain U.S. defined benefit pension plans the opportunity to take a one-time lump sum cash payment in lieu of receiving a future monthly annuity. A lump sum payout option was offered in 2020, and the Company paid $52 million in benefits to terminated vested participants who elected to participate. Plan assets Each PPG sponsored defined benefit pension plan is managed in accordance with the requirements of local laws and regulations governing defined benefit pension plans for the exclusive purpose of providing pension benefits to participants and their beneficiaries. Investment committees comprised of PPG managers have fiduciary responsibility to oversee the management of pension plan assets by third party asset managers. Pension plan assets are held in trust by financial institutions and managed on a day-to-day basis by the asset managers. The asset managers receive a mandate from each investment committee that is aligned with the asset allocation targets established by each investment committee to achieve the plan’s investment strategies. The performance of the asset managers is monitored and evaluated by the investment committees throughout the year. Pension plan assets are invested to generate investment earnings over an extended time horizon to help fund the cost of benefits promised under the plans while mitigating investment risk. The asset allocation targets established for each pension plan are intended to diversify the investments among a variety of asset categories and among a variety of individual securities within each asset category to mitigate investment risk and provide each plan with sufficient liquidity to fund the payment of pension benefits to retirees. The following summarizes the weighted average target pension plan asset allocation as of December 31, 2021 and 2020 for all PPG defined benefit plans: Asset Category 2021 2020 Equity securities 15-45% 15-45% Debt securities 30-65% 30-65% Real estate 0-10% 0-10% Other 20-40% 20-40% The fair values of the Company’s pension plan assets at December 31, 2021 and 2020, by asset category, are as follows: December 31, 2021 December 31, 2020 ($ in millions) Level 1 (1) Level 2 (1) Level 3 (1) Total Level 1 (1) Level 2 (1) Level 3 (1) Total Asset Category Equity securities: U.S. Large cap $79 $78 $— $157 $65 $94 $— $159 Small cap 48 — — 48 42 — — 42 Non-U.S. Developed and emerging markets (2) 130 76 — 206 144 80 — 224 Debt securities: Cash and cash equivalents 8 42 — 50 5 10 — 15 Corporate (3) U.S. (4) — 232 100 332 — 386 78 464 Developed and emerging markets (2) — 1 — 1 — 2 — 2 Diversified (5) — 57 — 57 — 126 — 126 Government U.S. (4) 68 13 — 81 82 20 — 102 Developed markets — 10 — 10 — 19 — 19 Other (6) — — 367 367 — — 421 421 Real estate, hedge funds, and other — 562 487 1,049 — 515 417 932 Total assets in the fair value hierarchy $333 $1,071 $954 $2,358 $338 $1,252 $916 $2,506 Common-collective trusts (7) — — — 617 — — — 710 Total Investments $333 $1,071 $954 $2,975 $338 $1,252 $916 $3,216 (1) These levels refer to the accounting guidance on fair value measurement described in Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements.” (2) These amounts represent holdings in investment grade debt or equity securities of issuers in both developed markets and emerging economies. (3) This category represents investment grade debt securities from a diverse set of industry issuers. (4) These investments are primarily long duration fixed income securities. (5) This category represents commingled funds invested in diverse portfolios of debt securities. (6) This category includes mortgage-backed and asset backed debt securities, municipal bonds and other debt securities including derivatives. (7) Certain investments that are measured at net asset value per share (or its equivalent) are not required to be classified in the fair value hierarchy. The change in the fair value of the Company’s Level 3 pension assets for the years ended December 31, 2021 and 2020 was as follows: ($ in millions) Real Estate Other Debt Securities Hedge Funds and Other Assets Total January 1, 2020 $123 $377 $335 $835 Realized gains 4 24 2 30 Unrealized losses (5) — (2) (7) Transfers in/(out), net 1 (14) 28 15 Foreign currency gains 1 34 8 43 December 31, 2020 $124 $421 $371 $916 Realized gains/(losses) 3 (11) 9 1 Unrealized gains 22 — 8 30 Transfers in/(out), net 8 (14) 44 38 Foreign currency losses — (29) (2) (31) December 31, 2021 $157 $367 $430 $954 Real estate properties are externally appraised at least annually by reputable, independent appraisal firms. Property valuations are also reviewed on a regular basis and are adjusted if there has been a significant change in circumstances related to the property since the last valuation. Other debt securities consist of insurance contracts, which are valued externally by insurance companies based on the present value of the expected future cash flows. Hedge funds consist of a wide range of investments which target a relatively stable investment return. The underlying funds are valued at different frequencies, some monthly and some quarterly, based on the value of the underlying investments. Other assets consist primarily of small investments in private equity funds and senior secured debt obligations of non-investment grade borrowers. Other Plans Employee savings plans PPG’s Employee Savings Plans (“Savings Plans”) cover substantially all employees in the U.S., Puerto Rico and Canada. The Company makes matching contributions to the Savings Plans, at management’s discretion, based upon participants’ savings, subject to certain limitations. For most participants, Company-matching contributions are established each year at the discretion of the Company and are applied to participant accounts up to a maximum of 6% of eligible participant compensation. The Company-matching contribution remained at 100% for 2021. Compensation expense and cash contributions related to the Company match of participant contributions to the Savings Plans for 2021, 2020, and 2019 totaled $52 million, $50 million and $49 million, respectively. A portion of the Savings Plans qualifies under the Internal Revenue Code as an Employee Stock Ownership Plan. Accordingly, dividends received on PPG shares held in that portion of the Savings Plans totaling $10 million, $11 million, and $11 million for 2021, 2020, and 2019, respectively, are deductible for PPG’s U.S. Federal tax purposes. Defined contribution plans Additionally, the Company has defined contribution plans for certain employees in the U.S., China, United Kingdom, Australia, Italy and other countries. The U.S. defined contribution plan is part of the Employee Savings Plan, and eligible employees receive a contribution equal to between 2% and 5% of annual compensation, based on age and years of service. For the years ended December 31, 2021, 2020 and 2019, the Company recognized expense for its defined contribution retirement plans of $88 million, $64 million and $70 million, respectively. The Company’s annual cash contributions to its defined contribution retirement plans approximated the expense recognized in each year. Deferred compensation plan The Company has a deferred compensation plan for certain key managers which allows them to defer a portion of their compensation in a phantom PPG stock account or other phantom investment accounts. The amount deferred earns a return based on the investment options selected by the participant. The amount owed to participants is an unfunded and unsecured general obligation of the Company. Upon retirement, death, disability, termination of employment, scheduled payment or unforeseen emergency, the compensation deferred and related accumulated earnings are distributed in accordance with the participant’s election in cash or in PPG stock, based on the accounts selected by the participant. The plan provides participants with investment alternatives and the ability to transfer amounts between the phantom non-PPG stock investment accounts. To mitigate the impact on compensation expense of changes in the market value of the liability, the Company has purchased a portfolio of marketable securities that mirror the phantom non-PPG stock investment accounts selected by the participants, except the money market accounts. These investments are carried by PPG at fair market value, and the changes in market value of these securities are also included in Income before income taxes in the consolidated statement of income. Trading occurs in this portfolio to align the securities held with the participant’s phantom non-PPG stock investment accounts, except the money market accounts. The cost of the deferred compensation plan, comprised of dividend equivalents accrued on the phantom PPG stock account, investment income and the change in market value of the liability, was $20 million, $25 million and $21 million in 2021, 2020 and 2019, respectively. These amounts are included in Selling, general and administrative in the consolidated statements of income. The change in market value of the investment portfolio was income of $18 million, $24 million, and $20 million in 2021, 2020 and 2019, respectively, and is also included in Selling, general and administrative in the consolidated statements of income. The Company’s obligations under this plan, which are included in Accounts payable and accrued liabilities and Other liabilities on the consolidated balance sheet, totaled $139 million and $138 million as of December 31, 2021 and 2020, respectively, and the investments in marketable securities, which are included in Investments and Other current assets on the accompanying consolidated balance sheet, were $104 million and $103 million as of December 31, 2021 and 2020, respectively.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	Commitments and Contingent Liabilities PPG is involved in a number of lawsuits and claims, both actual and potential, including some that it has asserted against others, in which substantial monetary damages are sought. These lawsuits and claims may relate to contract, patent, environmental, product liability, antitrust, employment and other matters arising out of the conduct of PPG’s current and past business activities. To the extent that these lawsuits and claims involve personal injury, property damage and certain other claims, PPG believes it has adequate insurance; however, certain of PPG’s insurers are contesting coverage with respect to some of these claims, and other insurers, as they had prior to the asbestos settlement described below, may contest coverage with respect to some of the asbestos claims. PPG’s lawsuits and claims against others include claims against insurers and other third parties with respect to actual and contingent losses related to environmental, asbestos and other matters. The results of any current or future litigation and claims are inherently unpredictable. However, management believes that, in the aggregate, the outcome of all lawsuits and claims involving PPG will not have a material effect on PPG’s consolidated financial position or liquidity; however, such outcome may be material to the results of operations of any particular period in which costs, if any, are recognized. Asbestos Matters Prior to 2000, the Company had been named as a defendant in numerous claims alleging bodily injury from exposure to asbestos, including exposure to asbestos-containing products of Pittsburgh Corning Corporation (“PC”) for which the Company was alleged to be liable (the Company and Corning Incorporated were each 50% shareholders in PC prior to April 27, 2016). In 2000, PC filed for relief under Chapter 11 of the Bankruptcy Code in the U.S. Bankruptcy Court for the Western District of Pennsylvania, and the Bankruptcy Court enjoined the prosecution of asbestos litigation against the Company during the pendency of the bankruptcy proceeding. Following a settlement with certain of the Company’s insurers that was incorporated into a plan of reorganization for PC, the Bankruptcy Court issued a channeling injunction that prohibits claimants from asserting claims against, among others, the Company arising out of exposure to asbestos or asbestos-containing products manufactured, sold or distributed by PC or asbestos on or emanating from any PC premises. The channeling injunction by its terms also precludes the prosecution of other asbestos-related claims against the Company arising out of prior relationships with PC. The foregoing PC-related claims are referred to as “PC Relationship Claims.” The channeling injunction channels the Company’s liability for PC Relationship Claims to a trust funded in part by the Company and certain of its insurers (the “Trust”), and this Trust is the sole recourse for holders of PC Relationship Claims. The channeling injunction does not extend to claims against the Company alleging: • exposure to asbestos or asbestos-containing products manufactured, sold or distributed by the Company or its subsidiaries that are not PC Relationship Claims (“Products Claims”); and • personal injury caused by asbestos on premises presently or formerly owned, leased or occupied by the Company (“Premises Claims”). In 2009, the Company established a $162 million reserve for Products Claims that it has monitored and reviewed on a periodic basis, and until 2021, the Company had not had sufficient current claims information or settlement history on which to base a better estimate of this liability in light of the Bankruptcy Court’s injunction staying most asbestos claims against the Company which was in effect from April 2000 through May 2016. Current open and active claims As of December 31, 2021, the Company was aware of certain asbestos-related claims pending against the Company and certain of its subsidiaries, consisting of Products Claims, Premises Claims and claims against a subsidiary the Company acquired in 2013 (“Subsidiary Claims”). The Company is defending these claims vigorously. In 2019, as certain claims data became available and as a supplement to its periodic monitoring and review, the Company began performing an annual valuation analysis, based in part on discussions with counsel and reports from valuation consultants, of its claims history and the amount of the Company’s potential liability for asbestos-related claims. As a result of the Company’s 2019 review of its asbestos-related liabilities, a charge of $12 million was recorded in the consolidated statement of income to increase the reserve to reflect the Company’s estimates of potential liability for Premises Claims and Subsidiary Claims. In 2020, based on the results of the Company’s annual valuation analysis, no adjustments to the Company’s estimate of its asbestos-related liabilities were required. In the fourth quarter of 2021, as additional claims data became available following the expiration of the Bankruptcy Court’s injunction in May 2016, the Company adjusted its estimate of potential liability for Products Claims. The 2021 valuation analysis with respect to Products Claims was based, in part, upon a review of claims data; annual filings by disease and year; pending, paid and dismissed claims; indemnity cash flows; and estimates of future claim, indemnity and acceptance rates. The Company also further adjusted its estimates of potential liability for Premises Claims and Subsidiary Claims in the fourth quarter of 2021. As a result of the Company’s fourth quarter 2021 review of its asbestos-related liabilities, income of $133 million was recorded in the consolidated statement of income to reduce the reserve to reflect the Company’s current estimate of potential liability for asbestos-related bodily injury claims through December 31, 2057. As of December 31, 2021 and 2020, the Company’s asbestos-related reserves totaled $54 million and $190 million, respectively. The Company believes that, based on presently available information, the total reserves of $54 million for asbestos-related claims will be sufficient to encompass all of the Company’s current and estimable potential future asbestos liabilities. These reserves, which are included within Other liabilities on the accompanying consolidated balance sheets, involve significant management judgment and represent the Company’s current best estimate of its liability for these claims. The Company monitors and reviews the activity associated with its asbestos claims and evaluates, on a periodic basis, its estimated liability for such claims and all underlying assumptions to determine whether any adjustment to the reserves for these claims is required. The amount reserved for asbestos-related claims by its nature is subject to many uncertainties that may change over time, including (i) the ultimate number of claims filed; (ii) whether closed, dismissed or dormant claims are reinstituted, reinstated or revived; (iii) the amounts required to resolve both currently known and future unknown claims; (iv) the amount of insurance, if any, available to cover such claims; (v) the unpredictable aspects of the tort system, including a changing trial docket and the jurisdictions in which trials are scheduled; (vi) the outcome of any trials, including potential judgments or jury verdicts; (vii) the lack of specific information in many cases concerning exposure for which the Company is allegedly responsible, and the claimants’ alleged diseases resulting from such exposure; and (viii) potential changes in applicable federal and/or state tort liability law. All of these factors may have a material effect upon future asbestos-related liability estimates. While the ultimate outcome of the Company’s asbestos litigation cannot be predicted with certainty, the Company believes that any financial exposure resulting from its asbestos-related claims will not have a material adverse effect on the Company’s consolidated financial position, liquidity or results of operations. Environmental Matters In management’s opinion, the Company operates in an environmentally sound manner and the outcome of the Company’s environmental contingencies will not have a material effect on PPG’s financial position or liquidity; however, any such outcome may be material to the results of operations of any particular period in which costs, if any, are recognized. Management anticipates that the resolution of the Company’s environmental contingencies will occur over an extended period of time. As remediation at certain environmental sites progresses, PPG continues to refine its assumptions underlying the estimates of the expected future costs of its remediation programs. PPG’s ongoing evaluation may result in additional charges against income to adjust the reserves for these sites. In 2021, 2020 and 2019, certain charges have been recorded based on updated estimates to increase existing reserves for these sites. Certain other charges related to environmental remediation actions are also expensed as incurred. As of December 31, 2021 and 2020, PPG had reserves for environmental contingencies associated with PPG’s former chromium manufacturing plant in Jersey City, New Jersey (“New Jersey Chrome”), glass and chemical manufacturing sites, and for other environmental contingencies, including current manufacturing locations and National Priority List sites. These reserves are reported as Accounts payable and accrued liabilities and Other liabilities in the accompanying consolidated balance sheet. Environmental Reserves ($ in millions) 2021 2020 New Jersey Chrome $89 $102 Glass and chemical 83 106 Other 110 92 Total $282 $300 Current Portion $97 $99 In the fourth quarter 2021, PPG released an environmental reserve previously established at the time of the sale of the flat glass business under the terms of the separation agreement, resulting in recognition of $25 million income from discontinued operations. Pretax charges against income for environmental remediation costs are included in Other charges in the accompanying consolidated statement of income. The pretax charges and cash outlays related to such environmental remediation in 2021, 2020 and 2019, were as follows: ($ in millions) 2021 2020 2019 New Jersey Chrome $25 $15 $43 Glass and chemical 12 15 12 Other 7 8 22 Total $44 $38 $77 Cash outlays for environmental spending $56 $60 $77 The Company continues to analyze, assess and remediate the environmental issues associated with New Jersey Chrome as further discussed below. Excluding the charges related to New Jersey Chrome, pretax charges against income for environmental remediation have ranged between approximately $5 million and $35 million per year for the past 10 years. Management expects cash outlays for environmental remediation costs to range from $80 million to $100 million in 2022 and $20 million to $75 million annually from 2023 through 2026. It is possible that technological, regulatory and enforcement developments, the results of environmental studies and other factors could alter the Company’s expectations with respect to future charges against income and future cash outlays. Specifically, the level of expected future remediation costs and cash outlays is highly dependent upon activity related to New Jersey Chrome as discussed below. Remediation: New Jersey Chrome In June 2009, PPG entered into a settlement agreement with the New Jersey Department of Environmental Protection (“NJDEP”) and Jersey City, New Jersey (which had asserted claims against PPG for lost tax revenue) which was in the form of a Judicial Consent Order (the "JCO"). Under the JCO, PPG accepted sole responsibility for the remediation activities at its former chromium manufacturing location in Jersey City and 19 additional sites. The principal contaminant of concern is hexavalent chromium. The JCO also provided for the appointment of a court-approved Site Administrator who is responsible for establishing a master schedule for the remediation of the 20 PPG sites which existed at that time. Over the years, sites have been added as well as removed from the JCO process. Of the original sites in the JCO, a total of 6 soil sites and 11 groundwater sites remain subject to the JCO process. The most significant assumptions underlying the estimate of remediation costs for all New Jersey Chrome sites are those related to the extent and concentration of chromium impacts in the soil, as these determine the quantity of soil that must be treated in place, the quantity that will have to be excavated and transported for offsite disposal, and the nature of disposal required. Remediation of chromium contaminated soils at the location of the former manufacturing site has been substantially completed pursuant to approved remedial action work plans. Remediation of chromium contaminated soils at certain other smaller sites is ongoing and is expected to continue for several years. PPG regularly evaluates the assessments of costs incurred to date versus current progress and the potential cost impacts of the most recent information, including the extent of impacted soils, percentage of hazardous versus non-hazardous soils, daily soil excavation rates, and engineering, administrative and other associated costs. Based on these assessments, the reserve is adjusted accordingly. Principal factors affecting costs include refinements in the estimate of the mix of hazardous to non-hazardous soils to be excavated, an overall increase in soil volumes to be excavated, enhanced water management requirements, decreased daily soil excavation rates due to site conditions, initial estimates for remedial actions related to groundwater, an increase in materials, labor, and logistics costs due to inflationary factors, and oversight and management costs. Groundwater remediation at the former Garfield Avenue chromium manufacturing site and adjacent sites is expected to occur over several years. A final groundwater remedial action work plan was submitted to NJDEP in the fourth quarter of 2021. PPG’s reserve for remediation of all New Jersey Chrome sites was $89 million at December 31, 2021. The major cost components of this liability are related to excavation of impacted soil, as well as groundwater remediation. These components each account for approximately 40% and 20% of the accrued amount, respectively. There are multiple, future events yet to occur, including further remedy selection and design, remedy implementation and execution and applicable governmental agency or community organization approvals. Considerable uncertainty exists regarding the timing of these future events for the New Jersey Chrome sites. Further resolution of these events is expected to occur over the next several years. As these events occur and to the extent that the cost estimates of the environmental remediation remedies change, the existing reserve for this environmental remediation matter will continue to be adjusted. Remediation: Glass, Chemicals and Other Sites Among other sites at which PPG is managing environmental liabilities, remedial actions are occurring at a chemical manufacturing site in Barberton, Ohio where PPG has completed a Facility Investigation and Corrective Measure Study under the United States Environmental Protection Agency's Resource Conservation and Recovery Act Corrective Action Program. PPG has also been addressing the impacts from a legacy plate glass manufacturing site in Kokomo, Indiana under the Voluntary Remediation Program of the Indiana Department of Environmental Management and a site associated with a legacy plate glass manufacturing site near Ford City, Pennsylvania under the Pennsylvania Land Recycling Program under the oversight of the Pennsylvania Department of Environmental Protection. PPG is currently performing additional investigation and remedial activities at these locations. With respect to certain other waste sites, the financial condition of other potentially responsible parties also contributes to the uncertainty of estimating PPG’s final costs. Although contributors of waste to sites involving other potentially responsible parties may face governmental agency assertions of joint and several liability, in general, final allocations of costs are made based on the relative contributions of wastes to such sites. PPG is generally not a major contributor to such sites. Remediation: Reasonably Possible Matters In addition to the amounts currently reserved for environmental remediation, the Company may be subject to loss contingencies related to environmental matters estimated to be as much as $100 million to $200 million. Such unreserved losses are reasonably possible but are not currently considered to be probable of occurrence. These reasonably possible unreserved losses relate to environmental matters at a number of sites, none of which are individually significant. The loss contingencies related to these sites include significant unresolved issues such as the nature and extent of contamination at these sites and the methods that may have to be employed to remediate them. The impact of evolving programs, such as natural resource damage claims, industrial site re-use initiatives and domestic and international remediation programs, also adds to the present uncertainties with regard to the ultimate resolution of this unreserved exposure to future loss. The Company’s assessment of the potential impact of these environmental contingencies is subject to considerable uncertainty due to the complex, ongoing and evolving process of investigation and remediation, if necessary, of such environmental contingencies, and the potential for technological and regulatory developments.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Shareholders' Equity	Shareholders' Equity A class of 10 million shares of preferred stock, without par value, is authorized but unissued. Common stock has a par value of $1.66 2 / 3 per share; 1.2 billion shares are authorized. Common Stock Treasury Stock Shares Outstanding January 1, 2019 581,146,136 (345,284,702) 235,861,434 Purchases — (2,722,800) (2,722,800) Issuances — 2,541,836 2,541,836 December 31, 2019 581,146,136 (345,465,666) 235,680,470 Issuances — 1,005,795 1,005,795 December 31, 2020 581,146,136 (344,459,871) 236,686,265 Purchases — (1,521,765) (1,521,765) Issuances — 742,526 742,526 December 31, 2021 581,146,136 (345,239,110) 235,907,026 Per share cash dividends paid were $2.26, $2.10 and $1.98 in 2021, 2020 and 2019, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss ($ in millions) Foreign Currency Translation Adjustments (1) Pension and Other Postretirement Benefit Adjustments, net of tax (2) Unrealized Gain/(Loss) on Derivatives, net of tax Accumulated Other Comprehensive Loss January 1, 2019 ($1,734) ($568) $2 ($2,300) Current year deferrals to AOCL 107 (167) 1 (59) Reclassifications from AOCL to net income — 11 (2) 9 December 31, 2019 ($1,627) ($724) $1 ($2,350) Current year deferrals to AOCL (36) (237) — (273) Reclassifications from AOCL to net income — 24 — 24 December 31, 2020 ($1,663) ($937) $1 ($2,599) Current year deferrals to AOCL (325) 132 — (193) Reclassifications from AOCL to net income — 42 — 42 December 31, 2021 ($1,988) ($763) $1 ($2,750) (1) The tax cost/(benefit) related to unrealized foreign currency translation adjustments on tax inter-branch transactions and net investment hedges as of December 31, 2021, 2020 and 2019 was $55 million, $(6) million and $19 million, respectively. (2) The tax cost/(benefit) related to the adjustment for pension and other postretirement benefits as of December 31, 2021, 2020 and 2019 was $48 million, $(70) million and $(57) million, respectively. Reclassifications from AOCI are included in the computation of net periodic benefit costs (see Note 13, “Employee Benefit Plans").

Other Income

Other Income	12 Months Ended
	Dec. 31, 2021
Other Income and Expenses [Abstract]
Other Earnings	Other Income ($ in millions) 2021 2020 2019 Gain on sale of assets (1) $47 $5 $7 Royalty income 8 7 8 Share of net earnings of equity affiliates (See Note 5) 15 8 11 Income from legal settlements 22 — — Other 80 48 63 Total $172 $68 $89 (1) In 2021, PPG recognized a $34 million gain on the sale of a production facility in connection with the Company’s manufacturing footprint consolidation plans and associated restructuring programs.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation	Stock-Based Compensation The Company’s stock-based compensation includes stock options, restricted stock units (“RSUs”) and grants of contingent shares that are earned based on achieving targeted levels of total shareholder return. All current grants of stock options, RSUs and contingent shares are made under the PPG Industries, Inc. Amended and Restated Omnibus Incentive Plan (“PPG Amended Omnibus Plan”), which was amended and restated effective April 21, 2016. Shares available for future grants under the PPG Amended Omnibus Plan were 5.0 million as of December 31, 2021. ($ in millions) 2021 2020 2019 Total stock-based compensation $57 $44 $39 Income tax benefit recognized $12 $10 $9 Stock Options PPG has outstanding stock option awards that have been granted under the PPG Amended Omnibus Plan. Under the PPG Amended Omnibus Plan, certain employees of the Company have been granted options to purchase shares of common stock at prices equal to the fair market value of the shares on the date the options were granted. The options are generally exercisable 36 months after being granted and have a maximum term of 10 years. Upon exercise of a stock option, shares of Company stock are issued from treasury stock. The fair value of stock options issued to employees is measured on the date of grant and is recognized as expense, net of estimated forfeitures, over the requisite service period. PPG estimates the fair value of stock options using the Black-Scholes option pricing model. The risk-free interest rate is determined by using the U.S. Treasury yield curve at the date of the grant and using a maturity equal to the expected life of the option. The expected life of options is calculated using the average of the vesting term and the maximum term, as prescribed by accounting guidance on the use of the simplified method for determining the expected term of an employee share option. The expected dividend yield and volatility are based on historical stock prices and dividend amounts over past time periods equal in length to the expected life of the options. PPG applies an estimated forfeiture rate that is calculated based on historical activity. The following weighted average assumptions were used to calculate the fair values of stock option grants in each year: 2021 2020 2019 Weighted average exercise price $136.60 $119.52 $109.74 Risk free interest rate 1.0 % 1.6 % 2.6 % Expected life of option in years 6.5 6.5 6.5 Expected dividend yield 1.6 % 1.5 % 1.6 % Expected volatility 25.3 % 20.0 % 20.0 % The weighted average fair value of options granted was $29.27 per share, $21.93 per share and $22.50 per share for the years ended December 31, 2021, 2020, and 2019, respectively. Stock Options Outstanding and Exercisable Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in years) Intrinsic Value (in millions) Outstanding, January 1, 2021 3,371,282 $104.18 6.2 $135 Granted 527,464 $136.60 Exercised (510,864) $91.77 Forfeited/Expired (47,480) $120.01 Outstanding, December 31, 2021 3,340,402 $110.98 6.1 $205 Vested or expected to vest, December 31, 2021 3,245,875 $110.45 6.0 $201 Exercisable, December 31, 2021 1,687,933 $100.46 4.1 $121 At December 31, 2021, unrecognized compensation cost related to outstanding stock options that have not yet vested totaled $8 million. This cost is expected to be recognized as expense over a weighted average period of 1.5 years. The following table presents stock option activity for the years ended December 31, 2021, 2020 and 2019: ($ in millions) 2021 2020 2019 Total intrinsic value of stock options exercised $32 $31 $38 Cash received from stock option exercises $47 $54 $61 Income tax benefit from the exercise of stock options $8 $7 $9 Total fair value of stock options vested $11 $11 $12 Restricted Stock Units (“RSUs”) Long-term incentive value is delivered to selected key management employees by granting RSUs, which have either time or performance-based vesting features. The fair value of an RSU is equal to the market value of a share of PPG stock on the date of grant. Time-based RSUs generally vest over the three three three three For awards granted in 2021 and 2020, the amount paid upon vesting of performance-based RSUs may range from 0% to 200% of the original grant, based upon the level of earnings per share growth achieved and frequency with which the annual cash flow return on capital performance target is met over the three RSU Activity Number of Shares Weighted Average Fair Value Intrinsic Value (in millions) Outstanding, January 1, 2021 591,929 $113.74 $67 Granted 263,911 $120.89 Released from restrictions (215,208) $142.21 Forfeited (18,577) $122.32 Outstanding, December 31, 2021 622,055 $125.92 $78 Vested or expected to vest, December 31, 2021 592,068 $125.60 $73 There was $24 million of total unrecognized compensation cost related to unvested RSUs outstanding as of December 31, 2021. This cost is expected to be recognized as expense over a weighted average period of 1.5 years. Contingent Share Grants The Company also provides grants of contingent shares to selected key executives that may be earned based on PPG total shareholder return (“TSR”) over the three three three three three The performance period for the TSR shares granted in 2019 ended on December 31, 2021, and PPG’s total shareholder return was measured against that of the S&P 500 over the three As of December 31, 2021, there was $7 million of total unrecognized compensation cost related to outstanding TSR awards based on the current estimate of fair value. This cost is expected to be recognized as expense over a weighted average period of 1.4 years.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company recognizes revenue when control of the promised goods or services is transferred to the customer and in amounts that the Company expects to collect. The timing of revenue recognition takes into consideration the various shipping terms applicable to the Company’s sales. For most transactions, control passes in accordance with agreed upon delivery terms. The Company delivers products to company-owned stores, home centers and other regional or national consumer retail outlets, paint dealers, concessionaires and independent distributors, company-owned distribution networks, and directly to manufacturing companies and retail customers. Each product delivered to a third party customer is considered to satisfy a performance obligation. Performance obligations generally occur at a point in time and are satisfied when control of the goods passes to the customer. The Company is entitled to collection of the sales price under normal credit terms in the regions in which it operates. Accounts receivable are recognized when there is an unconditional right to consideration. Payment terms vary from customer to customer, depending on creditworthiness, prior payment history and other considerations. The Company also provides services by applying coatings to customers' manufactured parts and assembled products and by providing technical support to certain customers. Performance obligations are satisfied over time as critical milestones are met and as services are provided. PPG is entitled to payment as the services are rendered. For the years ended December 31, 2021, 2020 and 2019, service revenue constituted less than 5% of total revenue. Net sales by segment and region for the years ended December 31, 2021, 2020 and 2019 were as follows: ($ in millions) 2021 2020 2019 Performance Coatings United States and Canada $4,366 $3,673 $4,057 EMEA 3,582 2,861 2,869 Asia Pacific 1,254 1,015 1,095 Latin America 1,131 946 1,013 Total $10,333 $8,495 $9,034 Industrial Coatings United States and Canada $2,310 $1,995 $2,418 EMEA 1,854 1,467 1,680 Asia Pacific 1,723 1,416 1,447 Latin America 582 461 567 Total $6,469 $5,339 $6,112 Total Net Sales (1) United States and Canada $6,676 $5,668 $6,475 EMEA 5,436 4,328 4,549 Asia Pacific 2,977 2,431 2,542 Latin America 1,713 1,407 1,580 Total PPG $16,802 $13,834 $15,146 (1) Net sales to external customers are attributed to geographic regions based upon the location of the operating unit shipping the product. Allowance for Doubtful Accounts All trade receivables are reported on the consolidated balance sheet at the outstanding principal amount adjusted for any allowance for doubtful accounts and any charge-offs. PPG provides an allowance for doubtful accounts to reduce trade receivables to their estimated net realizable value equal to the amount that is expected to be collected. This allowance is estimated based on historical collection experience, current regional economic and market conditions, the aging of accounts receivable, assessments of current creditworthiness of customers and forward-looking information. The use of forward-looking information is based on certain macroeconomic and microeconomic indicators including, but not limited to, regional business environment risk, political risk, and commercial and financing risks. PPG reviews its allowance for doubtful accounts on a quarterly basis to ensure the estimate reflects regional risk trends as well as current and future global operating conditions. The following table summarizes allowance for doubtful accounts activity for the years ended December 31, 2021 and 2020: Trade Receivables Allowance for Doubtful Accounts ($ in millions) 2021 2020 January 1 $44 $22 Bad debt expense 19 14 Change in allowance for doubtful accounts related to COVID-19 (1) (14) 30 Trade receivables written off as uncollectible, net of recoveries (18) (22) December 31 $31 $44

Reportable Business Segment Inf

Reportable Business Segment Information	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Reportable Business Segment Information	Reportable Business Segment Information Segment Organization and Products PPG is a multinational manufacturer with 10 operating segments (which the Company refers to as “strategic business units”) that are organized based on the Company’s major products lines. The Company’s reportable business segments include the following two segments: Performance Coatings and Industrial Coatings. The operating segments have been aggregated based on economic similarities, the nature of their products, production processes, end-use markets and methods of distribution. The Performance Coatings reportable business segment is comprised of the automotive refinish coatings, aerospace coatings, architectural coatings – Americas and Asia Pacific, architectural coatings – EMEA, protective and marine coatings and traffic solutions operating segments. This reportable business segment primarily supplies a variety of protective and decorative coatings, sealants and finishes, along with paint strippers, stains and related chemicals, pavement marking products, transparencies and transparent armor. The Industrial Coatings reportable business segment is comprised of the automotive OEM coatings, industrial coatings, packaging coatings, and the specialty coatings and materials operating segments. This reportable business segment primarily supplies a variety of protective and decorative coatings and finishes along with adhesives, sealants, metal pretreatment products, optical monomers and coatings, precipitated silicas and other specialty materials. Production facilities and sales for Performance Coatings and Industrial Coatings are global. PPG’s reportable business segments continue to pursue opportunities to further develop their global reach, including efforts in Asia, Eastern Europe and Latin America. Each of the reportable business segments in which PPG is engaged is highly competitive. The diversification of our product lines and the worldwide sales tend to minimize the impact on PPG’s business of changes in demand in a particular industry or in a particular geographic area. The accounting policies of the operating segments are the same as those described in the summary of significant accounting policies (see Note 1, “Summary of Significant Accounting Policies”). The Company allocates resources to operating segments and evaluates the performance of operating segments based upon segment income, which is income before interest expense – net, income taxes, and noncontrolling interests and excludes certain charges which are considered to be unusual or non-recurring. The Company also evaluates performance of operating segments based on working capital reduction, selling price increases and sales volume growth. Corporate unallocated costs include the costs of corporate staff functions not directly associated with the operating segments, certain legal matters, net of related insurance recoveries, the cost of certain insurance and stock-based compensation programs and certain other unusual or non-recurring items. The service cost component of net periodic pension expense related to current employees of each reportable business segment is allocated to that reportable business segment and the remaining portion of net periodic pension expense is included in the Corporate unallocated costs. Product movement between Performance Coatings and Industrial Coatings is limited, is accounted for as an inventory transfer, and is recorded at cost plus a mark-up, the impact of which is not significant to the net sales or segment income of the reportable business segments. ($ in millions) 2021 2020 2019 Net sales to external customers Performance Coatings $10,333 $8,495 $9,034 Industrial Coatings 6,469 5,339 6,112 Total Net sales $16,802 $13,834 $15,146 Segment income Performance Coatings $1,491 $1,359 $1,409 Industrial Coatings 680 750 862 Total Segment income $2,171 $2,109 $2,271 Corporate / Non-Segment Items Corporate unallocated (194) (233) (198) Interest expense, net of interest income (95) (115) (100) Acquisition-related costs, net (1) (86) (9) (17) Pension settlement charge (50) — — Environmental remediation charges, net (35) (26) (61) Business restructuring-related costs, net (2) (27) (224) (222) Impairment charges (3) (21) (93) — Expense incurred due to natural disasters (4) (17) (17) — Change in allowance for doubtful accounts related to COVID-19 14 (30) — Income from legal settlements 22 — — Asbestos-related claims reserve adjustment (5) 133 — (12) Total Income before income taxes $1,815 $1,362 $1,661 ($ in millions) 2021 2020 2019 Depreciation and amortization Performance Coatings $308 $251 $255 Industrial Coatings 212 200 194 Corporate / Non-Segment Items 41 58 62 Total $561 $509 $511 Share of net earnings of equity affiliates Performance Coatings $5 $3 $1 Corporate / Non-Segment Items 10 5 10 Total $15 $8 $11 Segment assets (6) Performance Coatings $13,395 $11,551 $10,636 Industrial Coatings 5,807 5,040 4,912 Corporate / Non-Segment Items 2,149 2,965 2,160 Total $21,351 $19,556 $17,708 Investment in equity affiliates Performance Coatings $33 $31 $33 Industrial Coatings 15 15 14 Corporate / Non-Segment Items 78 74 82 Total $126 $120 $129 Expenditures for property (including business acquisitions) Performance Coatings $1,698 $1,293 $483 Industrial Coatings 784 166 510 Corporate / Non-Segment Items 26 14 63 Total $2,508 $1,473 $1,056 ($ in millions) 2021 2020 2019 Geographic Information Segment income United States and Canada $865 $855 $1,073 EMEA 612 572 569 Asia Pacific 354 382 342 Latin America 340 300 287 Total $2,171 $2,109 $2,271 Property, plant and equipment — net United States and Canada $1,377 $1,351 $1,300 EMEA 1,069 857 836 Asia Pacific 702 623 538 Latin America 294 296 309 Total $3,442 $3,127 $2,983 (1) Acquisition-related costs, net include advisory, legal, accounting, valuation, other professional or consulting fees, and certain internal costs directly incurred to effect acquisitions. These costs are included in Selling, general and administrative expense in the consolidated statement of income. Acquisition-related costs, net also include the impact for the step up to fair value of inventory acquired in certain acquisitions which are included in Cost of Sales, exclusive of depreciation and amortization in the consolidated statement of income. (2) Included in business restructuring-related costs, net are business restructuring charges, accelerated depreciation of certain assets and other related costs, offset by releases related to previously approved programs and a $34 million gain on the sale of certain assets in 2021 in connection with the Company’s manufacturing footprint consolidation plans and associated restructuring programs. This gain is included in Other income in the consolidated statement of income. (3) In 2021 and 2020, impairment charges were recorded for the write-down of certain assets related to the previously planned sale of certain smaller entities in non-strategic regions. Also in 2020, an impairment charge was recorded to reduce the carrying value of an indefinite-lived trademark. (4) In 2020, two hurricanes damaged a southern U.S. factory supporting the Company's specialty coatings and materials business. In early 2021, a winter storm further damaged that factory as well as other company factories in the southern U.S. Incremental expenses incurred due to these storms included costs related to maintenance and repairs of damaged property, freight and utility premiums and other incremental expenses directly related to the impacted areas . (5) In the fourth quarter 2021, the reserve for asbestos-related claims was reduced to reflect the Company’s current estimate of potential liability for these claims. (6) Segment assets are the total assets used in the operation of each segment. Corporate assets are principally cash and cash equivalents, cash held in escrow, short term investments and deferred tax assets.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Allowance For Doubtful Accounts Policy	Receivables and Allowances
Lessee, Leases [Policy Text Block]	Leases The Company determines if a contract is a lease at the inception of the arrangement. The Company reviews all options to extend, terminate, or purchase its right of use assets at the inception of the lease and accounts for these options when they are reasonably certain of being exercised. Certain real estate leases contain lease and non-lease components, which are accounted for separately. For certain equipment leases, lease and non-lease components are accounted for as a single lease component. Leases with an initial term of twelve months or less are not recorded on the consolidated balance sheet. Lease expense for these leases is recognized on a straight-line basis over the lease term. Variable lease expense is based on contractual arrangements with PPG’s lessors determined based on external indices or other relevant market factors. In addition, PPG’s variable lease expense also includes elements of a contract that do not represent a good or service but for which the lessee is responsible for paying.
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements include the accounts of PPG Industries, Inc. (“PPG” or the “Company”) and all subsidiaries, both U.S. and non-U.S., that it controls. PPG owns more than 50% of the voting stock of most of the subsidiaries that it controls. For those consolidated subsidiaries in which the Company’s ownership is less than 100%, the outside shareholders’ interests are shown as noncontrolling interests. Investments in companies in which PPG owns 20% to 50% of the voting stock and has the ability to exercise significant influence over operating and financial policies of the investee are accounted for using the equity method of accounting. As a result, PPG’s share of income or losses from such equity affiliates is included in the consolidated statement of income and PPG’s share of these companies’ shareholders’ equity is included in Investments on the consolidated balance sheet. Transactions between PPG and its subsidiaries are eliminated in consolidation.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial StatementsThe preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of income and expenses during the reporting period. Such estimates also include the fair value of assets acquired and liabilities assumed resulting from the allocation of the purchase price related to business combinations consummated. Actual outcomes could differ from those estimates.
Revenue Recognition	Revenue Recognition Revenue is recognized as performance obligations with the customer are satisfied, at an amount that is determined to be collectible. For the sale of products, this generally occurs at the point in time when control of the Company’s products transfers to the customer based on the agreed upon shipping terms. Shipping and Handling Costs Amounts billed to customers for shipping and handling are reported in Net sales in the consolidated statement of income. Shipping and handling costs incurred by the Company for the delivery of goods to customers are included in Cost of sales, exclusive of depreciation and amortization in the consolidated statement of income. The Company recognizes revenue when control of the promised goods or services is transferred to the customer and in amounts that the Company expects to collect. The timing of revenue recognition takes into consideration the various shipping terms applicable to the Company’s sales. For most transactions, control passes in accordance with agreed upon delivery terms. The Company delivers products to company-owned stores, home centers and other regional or national consumer retail outlets, paint dealers, concessionaires and independent distributors, company-owned distribution networks, and directly to manufacturing companies and retail customers. Each product delivered to a third party customer is considered to satisfy a performance obligation. Performance obligations generally occur at a point in time and are satisfied when control of the goods passes to the customer. The Company is entitled to collection of the sales price under normal credit terms in the regions in which it operates. Accounts receivable are recognized when there is an unconditional right to consideration. Payment terms vary from customer to customer, depending on creditworthiness, prior payment history and other considerations. The Company also provides services by applying coatings to customers' manufactured parts and assembled products and by providing technical support to certain customers. Performance obligations are satisfied over time as critical milestones are met and as services are provided. PPG is entitled to payment as the services are rendered. For the years ended December 31, 2021, 2020 and 2019, service revenue constituted less than 5% of total revenue.
Selling, General and Administrative Costs	Selling, General and Administrative CostsAmounts presented in Selling, general and administrative in the consolidated statement of income are comprised of selling, customer service, distribution and advertising costs, as well as the costs of providing corporate-wide functional support in areas such as finance, law, human resources and planning. Distribution costs pertain to the movement and storage of finished goods inventory at company-owned and leased warehouses and other distribution facilities.
Advertising Costs, Policy	Advertising CostsAdvertising costs are charged to expense as incurred and totaled $243 million, $223 million and $283 million in 2021, 2020 and 2019, respectively.
Research and Development Expense, Policy	Research and DevelopmentResearch and development costs, which consist primarily of employee-related costs, are charged to expense as incurred.
Legal Costs	Legal Costs Legal costs, which primarily include costs associated with acquisition and divestiture transactions, general litigation, environmental regulation compliance, patent and trademark protection and other general corporate purposes, are charged to expense as incurred.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to operating losses and tax credit carryforwards as well as differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in Income tax expense in the consolidated statement of income in the period that includes the enactment date. A valuation allowance is provided against deferred tax assets in situations where PPG determines it is more likely than not such assets will not ultimately be realized. PPG does not recognize a tax benefit unless it concludes that it is more likely than not that the benefit will be sustained on audit by the taxing authority based solely on the technical merits of the associated tax position. If the recognition threshold is met, PPG recognizes a tax benefit measured at the largest amount of the tax benefit that, in PPG’s judgment, is greater than 50 percent likely to be realized. PPG records interest and penalties related to uncertain tax positions in Income tax expense in the consolidated statement of income.
Foreign Currency Translation	Foreign Currency Translation The functional currency of most significant non-U.S. operations is their local currency. Assets and liabilities of those operations are translated into U.S. dollars using year-end exchange rates; income and expenses are translated using the average exchange rates for the reporting period. Unrealized foreign currency translation gains and losses are deferred in Accumulated other comprehensive loss on the consolidated balance sheet.
Cash Equivalents	Cash Equivalents Cash equivalents are highly liquid investments (valued at cost, which approximates fair value) acquired with an original maturity of three months or less.
Short-term Investments	Short-term Investments Short-term investments are highly liquid, high credit quality investments (valued at cost plus accrued interest) that have stated maturities of greater than three months to less than one year. The purchases and sales of these investments are classified as Investing activities in the consolidated statement of cash flows.
Marketable Equity Securities	Marketable Equity Securities The Company’s investment in marketable equity securities is recorded at fair market value and reported as Other current assets and Investments on the consolidated balance sheet with changes in fair market value recorded in income.
Inventories	InventoriesInventories are stated at the lower of cost or net realizable value. Most U.S. inventories are stated at cost, using the last-in, first-out (“LIFO”) method of accounting, which does not exceed net realizable value. All other inventories are stated at cost, using the first-in, first-out (“FIFO”) method of accounting, which does not exceed net realizable value. PPG determines cost using either average or standard factory costs, which approximate actual costs, excluding certain fixed costs such as depreciation and property taxes. Refer to Note 3, “Working Capital Detail” for further information concerning the Company’s inventory.
Derivatives, Policy	Derivative Financial Instruments The Company recognizes all derivative financial instruments (a “derivative”) as either assets or liabilities at fair value on the consolidated balance sheet. The accounting for changes in the fair value of a derivative depends on the use of the instrument. For derivative instruments that are designated and qualify as cash flow hedges, the unrealized gains or losses on the derivatives are recorded in the consolidated statement of comprehensive income. Amounts in Accumulated other comprehensive loss on the consolidated balance sheet are reclassified into Income before income taxes in the consolidated statement of income in the same period or periods during which the hedged transactions are recorded in Income before income taxes in the consolidated statement of income. For derivative instruments that are designated and qualify as fair value hedges, the change in the fair value of the derivatives are reported in Income before income taxes in the consolidated statement of income, offsetting the gain or loss recognized for the change in fair value of the asset, liability, or firm commitment that is being hedged. For derivatives, debt or other financial instruments that are designated and qualify as net investment hedges, the gains or losses associated with the financial instruments are reported as translation gains or losses in Accumulated other comprehensive loss on the consolidated balance sheet. Gains and losses in Accumulated other comprehensive loss related to hedges of the Company’s net investments in foreign operations are reclassified out of Accumulated other comprehensive loss and recognized in Income before income taxes in the consolidated statement of income upon a substantial liquidation, sale or partial sale of such investments or upon impairment of all or a portion of such investments. The cash flow impact of these instruments is classified as Investing activities in the consolidated statement of cash flows. Changes in the fair value of derivative instruments not designated as hedges for hedge accounting purposes are recognized in Income before income taxes in the consolidated statement of income in the period of change.
Property	Property, Plant and Equipment Property, plant and equipment is recorded at cost. Depreciation is computed on a straight-line method based on the estimated useful lives of related assets. Additional depreciation expense is recorded when facilities or equipment are subject to abnormal economic conditions, restructuring actions or obsolescence.
Goodwill and Identifiable Intangible Assets	Goodwill and Identifiable Intangible Assets Goodwill represents the excess of the cost over the fair value of acquired identifiable tangible and intangible assets less liabilities assumed from acquired businesses. Identifiable intangible assets acquired in business combinations are recorded based upon their fair value at the date of acquisition. PPG is a multinational manufacturer with 10 operating segments (which the Company refers to as “strategic business units”) that are organized based on the Company’s major products lines. These operating segments are also the Company’s reporting units for purposes of testing goodwill for impairment, which is tested at least annually in connection with PPG’s strategic planning process or more frequently if an indication of impairment exists. The Company tests goodwill for impairment by either performing a qualitative evaluation or a quantitative test. The qualitative evaluation is an assessment of factors, including reporting unit specific operating results as well as industry, market and general economic conditions, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. The Company may elect to bypass this qualitative assessment for some or all of its reporting units and perform a quantitative test. Quantitative goodwill impairment testing, if deemed necessary, is performed during the fourth quarter of each year by comparing the estimated fair value of an associated reporting unit as of September 30 to its carrying value. Fair value is estimated using a discounted cash flow model. Key assumptions and estimates used in the discounted cash flow model include projected future revenues, discount rates, operating cash flows, capital expenditures and tax rates. In 2021, the annual impairment testing review of goodwill did not result in impairment of the Company’s reporting units. The Company has determined that certain acquired trademarks have indefinite useful lives. The Company tests the carrying value of these trademarks for impairment at least annually, or as needed whenever events and circumstances indicate that their carrying amount may not be recoverable. The annual assessment takes place in the fourth quarter of each year either by completing a qualitative assessment or quantitatively by comparing the estimated fair value of each trademark as of September 30 to its carrying value. Fair value is estimated by using the relief from royalty method (a discounted cash flow methodology). The qualitative assessment includes consideration of factors, including revenue relative to the asset being assessed, the operating results of the related business as well as industry, market and general economic conditions, to determine whether it is more likely than not that the fair value of the asset is less than its carrying amount. In 2021, the annual impairment testing review of indefinite-lived intangibles did not result in an impairment. Identifiable intangible assets with finite lives are amortized on a straight-line basis over their estimated useful lives (1 to 30 years) and are reviewed for impairment whenever events or circumstances indicate that their carrying amount may not be recoverable.
Product Warranties	Product Warranties The Company accrues for product warranties at the time the associated products are sold based on historical claims experience. The reserve, pretax charges against income and cash outlays for product warranties were not significant to the consolidated financial statements of the Company for any year presented.
Asset Retirement Obligations	Asset Retirement Obligations An asset retirement obligation represents a legal obligation associated with the retirement of a tangible long-lived asset that is incurred upon the acquisition, construction, development or normal operation of that long-lived asset. PPG recognizes asset retirement obligations in the period in which they are incurred if a reasonable estimate of fair value can be made. The asset retirement obligation is subsequently adjusted for changes in fair value. The associated estimated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset and depreciated over its useful life. PPG’s asset retirement obligations are primarily associated with the retirement or closure of certain assets used in PPG’s manufacturing process. The accrued asset retirement obligation is recorded in Accounts payable and accrued liabilities and Other liabilities on the consolidated balance sheet and was $22 million and $21 million as of December 31, 2021 and 2020, respectively. PPG’s only conditional asset retirement obligation relates to the possible future abatement of asbestos contained in certain PPG production facilities. The asbestos in PPG’s production facilities arises from the application of normal and customary building practices in the past when the facilities were constructed. This asbestos is encapsulated in place and, as a result, there is no current legal requirement to abate it. Because there is no requirement to abate, the Company does not have any current plans or an intention to abate and therefore the timing, method and cost of future abatement, if any, are not known. The Company has not recorded an asset retirement obligation associated with asbestos abatement, given the uncertainty concerning the timing of future abatement, if any.
Accounting Standard to be Adopted in Future Years	Accounting Standards to be Adopted in Future Years In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-06, “Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40).” This ASU simplifies the accounting for convertible debt instruments by removing certain accounting separation models as well as the accounting for debt instruments with embedded conversion features that are not required to be accounted for as derivative instruments. The ASU also updates and improves the consistency of earnings per share calculations for convertible instruments. The amendments in this ASU are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows. In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform." This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate ("LIBOR"). The amendments in this ASU apply only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued. The amendments in this ASU are effective through December 31, 2022. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows.
Environmental Costs, Capitalization Policy	Environmental ContingenciesIt is PPG’s policy to accrue expenses for environmental contingencies when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. Reserves for environmental contingencies are exclusive of claims against third parties and are generally not discounted.
Impairment or Disposal of Long-Lived Assets, Policy	Assets and Liabilities Held for Sale The Company classifies assets and liabilities as held for sale (a “disposal group”) when management commits to a plan to sell the disposal group, the sale is probable within one year and the disposal group is available for immediate sale in its present condition. The Company considers various factors, particularly whether actions required to complete the plan indicate it is unlikely that significant changes to the plan will be made or the plan will be withdrawn. Assets held for sale are measured at the lower of carrying value or fair value less costs to sell. Any loss resulting from the measurement is recognized in the period the held-for-sale criteria are met. Conversely, gains are not recognized until the date of the sale. When the disposal group is classified as held for sale, depreciation and amortization ceases and the Company tests the assets for impairment.
Reclassification, Comparability Adjustment	Reclassifications Certain reclassifications of prior years’ data have been made to conform to the current year presentation. These reclassifications had no impact on our previously reported Net income, cash flows or shareholders’ equity.
New Accounting Pronouncements, Policy	Accounting Standards Adopted in 2021 Effective January 1, 2021, PPG adopted Accounting Standards Update ("ASU") No. 2019-12, "Income Taxes - Simplifying the Accounting for Income Taxes." This ASU is intended to simplify various aspects of accounting for income taxes by eliminating certain exceptions within Accounting Standards Codification Topic 740, "Income Taxes" and to clarify certain aspects of the current accounting guidance. Adoption of this standard did not materially impact PPG's consolidated financial position, results of operations or cash flows. Accounting Standards to be Adopted in Future Years In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-06, “Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815-40).” This ASU simplifies the accounting for convertible debt instruments by removing certain accounting separation models as well as the accounting for debt instruments with embedded conversion features that are not required to be accounted for as derivative instruments. The ASU also updates and improves the consistency of earnings per share calculations for convertible instruments. The amendments in this ASU are effective for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows. In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform." This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate ("LIBOR"). The amendments in this ASU apply only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued. The amendments in this ASU are effective through December 31, 2022. PPG is currently assessing the potential impacts this ASU may have on its consolidated financial position, results of operations and cash flows.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Research and Development	($ in millions) 2021 2020 2019 Research and development – total $463 $401 $456 Less: depreciation on research facilities 24 22 24 Research and development, net $439 $379 $432

Acquisitions and Dispositions (

Acquisitions and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2021
Business Acquisition [Line Items]
Disposal Groups, Including Discontinued Operations	The major classes of assets and liabilities of these entities included in the PPG consolidated balance sheet at December 31, 2021 and 2020 were as follows: ($ in millions) December 31, 2021 December 31, 2020 Cash and cash equivalents $13 $20 Receivables — 5 Inventories — 5 Assets held for sale $13 $30 Accounts payable and accrued liabilities $13 $14 Operating lease liabilities 5 6 Deferred income taxes 2 3 Other liabilities 1 1 Liabilities held for sale $21 $24

Working Capital Detail (Tables)

Working Capital Detail (Tables)	12 Months Ended
	Dec. 31, 2021
Disclosure Components Of Working Capital Detail [Abstract]
Components of Working Capital Detail	Working Capital Detail ($ in millions) 2021 2020 Receivables Trade - net $2,687 $2,412 Other - net 465 314 Total $3,152 $2,726 Inventories (1) Finished products $1,175 $1,021 Work in process 234 187 Raw materials 723 490 Supplies 39 37 Total $2,171 $1,735 Accounts payable and accrued liabilities Trade $2,734 $2,259 Accrued payroll 534 505 Customer rebates 368 320 Other postretirement and pension benefits 87 85 Income taxes 36 46 Other 633 577 Total $4,392 $3,792 (1) Inventories valued using the LIFO method of inventory valuation comprised 29% and 33% of total gross inventory values as of December 31, 2021 and 2020, respectively. If the FIFO method of inventory valuation had been used, inventories would have been $174 million and $110 million higher as of December 31, 2021 and 2020, respectively.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment ($ in millions) Useful Lives (years) 2021 2020 Land and land improvements 1-30 $570 $541 Buildings 20-40 1,769 1,673 Machinery and equipment 5-25 3,949 3,794 Other 3-20 1,177 1,123 Construction in progress 509 345 Total $7,974 $7,476 Less: accumulated depreciation 4,532 4,349 Net $3,442 $3,127

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments	($ in millions) 2021 2020 Investments in equity affiliates $126 $120 Marketable equity securities (See Note 10) 98 97 Other 50 50 Total $274 $267

Goodwill and Other Identifiab_2

Goodwill and Other Identifiable Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying Amount of Goodwill Attributable to Each Reportable Segment	Goodwill ($ in millions) Performance Coatings Industrial Coatings Total January 1, 2020 $3,442 $1,028 $4,470 Acquisitions, including purchase accounting adjustments 519 15 534 Disposals (5) — (5) Foreign currency impact 67 36 103 December 31, 2020 $4,023 $1,079 $5,102 Acquisitions, including purchase accounting adjustments 1,188 177 1,365 Foreign currency impact (177) (42) (219) December 31, 2021 $5,034 $1,214 $6,248
Identifiable Intangible Assets with Finite Lives	Identifiable Intangible Assets December 31, 2021 December 31, 2020 ($ in millions) Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Indefinite-Lived Identifiable Intangible Assets Trademarks $1,449 $— $1,449 $1,101 $— $1,101 Definite-Lived Identifiable Intangible Assets Acquired technology $862 ($616) $246 $813 ($585) $228 Customer-related 1,956 (1,064) 892 1,849 (994) 855 Trade names 336 (144) 192 277 (129) 148 Other 51 (47) 4 64 (45) 19 Total Definite Lived Intangible Assets $3,205 ($1,871) $1,334 $3,003 ($1,753) $1,250 Total Identifiable Intangible Assets $4,654 ($1,871) $2,783 $4,104 ($1,753) $2,351 In the fourth quarter, the Company tests the carrying value of indefinite-lived trademarks for impairment, as discussed in Note 1, “Summary of Significant Accounting Policies.” In conjunction with the 2020 assessment, the long-term forecast of net sales for a trademark in the Performance Coatings segment was reduced as a result of historical performance. As a result, the Company recognized a pretax impairment charge of $38 million in Impairment charges in the accompanying consolidated statements of income. In 2021, the annual impairment testing review of indefinite-lived intangibles did not result in an impairment. Aggregate amortization expense was $172 million, $138 million and $136 million in 2021, 2020 and 2019, respectively. ($ in millions) 2022 2023 2024 2025 2026 Estimated future amortization expense $180 $165 $150 $135 $115

Business Restructuring (Tables)

Business Restructuring (Tables)	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Activity Related to Restructuring Reserves	The following table summarizes restructuring reserve activity for the years ended December 31, 2021 and 2020: Total Reserve ($ in millions) 2021 2020 January 1 $293 $224 Approved restructuring actions 54 203 Release of prior reserves and other adjustments (a) (23) (29) Cash payments (77) (126) Foreign currency impact (16) 21 December 31 $231 $293 (a) Certain releases were recorded to reflect the current estimate of costs to complete planned business restructuring actions.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense for the years ended December 31, 2021, 2020 and 2019 were as follows: ($ in millions) Classification in the Consolidated Statement of Income 2021 2020 2019 Operating lease cost Cost of sales, exclusive of depreciation and amortization $41 $34 $34 Operating lease cost Selling, general and administrative 219 206 198 Total operating lease cost $260 $240 $232 Finance lease cost: Amortization of right-of-use assets Depreciation $2 $2 $2 Interest on lease liabilities Interest expense 1 1 1 Total finance lease cost $3 $3 $3 Total lease cost $263 $243 $235 Total operating lease cost for the years ended December 31, 2021, 2020 and 2019 is inclusive of the following: ($ in millions) 2021 2020 2019 Variable lease costs $18 $17 $15 Short-term lease costs $16 $8 $5
Schedule of Classification on the Condensed Consolidated Balance Sheet	($ in millions) Classification on the Consolidated Balance Sheet 2021 2020 Assets: Operating Operating lease right-of-use assets $891 $847 Finance (1) Property, plant, and equipment, net 13 17 Total leased assets $904 $864 Liabilities: Current Operating Current portion of operating lease liabilities $192 $180 Finance Short-term debt and current portion of long-term debt 3 3 Noncurrent Operating Operating lease liabilities $693 $677 Finance Long-term debt 7 9 Total lease liabilities $895 $869 (1) Net of accumulated depreciation of $13 million as of December 31, 2021 and 2020.
Schedule of Cash Paid for Lease Liabilities and Right-of-Use Assets Obtained in Exchange for Lease Obligations	($ in millions) 2021 2020 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows paid for operating leases $224 $212 $210 Operating cash flows paid for finance leases $1 $1 $1 Financing cash flows paid for finance leases $3 $2 $4 Right-of-use assets obtained in exchange for lease obligations: Operating leases $253 $227 $219 Finance leases $— $4 $1 Lease terms and discount rates as of December 31, 2021, 2020 and 2019 were as follows:
Schedule of Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate	2021 2020 2019 Weighted-average remaining lease term (in years) Operating leases 7.1 7.4 7.4 Finance leases 6.4 6.1 6.2 Weighted-average discount rate Operating leases 2.1 % 2.4 % 3.0 % Finance leases 5.8 % 7.0 % 9.4 %
Schedule of Maturities of Lease Liabilities, Operating Lease	As of December 31, 2021, maturities of lease liabilities were as follows: ($ in millions) Operating Leases Finance Leases 2022 $210 $3 2023 170 3 2024 133 2 2025 103 1 2026 80 1 Thereafter 262 2 Total lease payments $958 $12 Less: Interest 73 2 Total lease obligations $885 $10
Schedule of Maturities of Lease Liabilities, Finance Lease	As of December 31, 2021, maturities of lease liabilities were as follows: ($ in millions) Operating Leases Finance Leases 2022 $210 $3 2023 170 3 2024 133 2 2025 103 1 2026 80 1 Thereafter 262 2 Total lease payments $958 $12 Less: Interest 73 2 Total lease obligations $885 $10

Borrowings and Lines of Credit

Borrowings and Lines of Credit (Tables)	12 Months Ended
	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term Debt Obligations ($ in millions) Maturity Date 2021 2020 9% non-callable debentures ($134) (1) 2021 — 134 0.875% notes (€600) 2022 — 732 3.2% notes ($300) (2) 2023 299 299 Term Loan Credit Agreement, due 2024 ($1,400) 2024 1,399 — 2.4% notes ($300) 2024 298 298 0.875% notes (€600) 2025 677 727 1.200% notes ($700) 2026 692 — 1.4% notes (€600) 2027 677 726 3.75% notes ($800) (3) 2028 811 813 2.5% notes (€80) 2029 90 94 2.8% notes ($300) 2029 298 299 2.55% notes ($300) 2030 296 296 7.70% notes ($176) 2038 174 174 5.5% notes ($250) 2040 247 247 3.0% notes (€120) 2044 130 139 Commercial paper Various 440 250 Various other non-U.S. debt (4) Various 1 38 Finance lease obligations Various 10 12 Impact of derivatives on debt (1)(5) N/A 36 68 Total $6,575 $5,346 Less payments due within one year N/A 3 175 Long-term debt $6,572 $5,171 (1) PPG entered into several interest rate swaps, which were subsequently settled in prior periods. The impact of these settlements was amortized over the life of the debentures as a reduction to interest expense. These interest rate swaps were terminated in 2021. The weighted average interest rate for these borrowings was 8.8% and 8.4% for the years ended December 31, 2021 and 2020, respectively. (2) In February 2018, PPG entered into interest rate swaps which converted $150 million of the notes from a fixed interest rate to a floating interest rate based on the three month London Interbank Offered Rate (LIBOR). The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 0.6% and 1.2% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (3) In February 2018, PPG entered into interest rate swaps which converted $375 million of the notes from a fixed interest rate to a floating interest rate based on the three month LIBOR. The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 1.0% and 1.6% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (4) Weighted average interest rate of 3.1% and 3.8% as of December 31, 2021 and 2020, respectively. (5) Fair value adjustment of the 3.2% $300 million notes and 3.75% $800 million notes as a result of fair value hedge accounting treatment related to the outstanding interest rate swaps as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. Long-Term Debt ($ in millions) December 31, 2021 (a) December 31, 2020 (b) Long-term debt - carrying value $6,565 $5,334 Long-term debt - fair value $6,958 $5,913 (a) Excluding finance lease obligations of $10 million and short term borrowings of $6 million as of December 31, 2021.
Schedule of Maturities of Long-term Debt	Long-term Debt Maturities ($ in millions) Maturity per year 2022 $3 2023 $301 2024 $2,136 2025 $679 2026 $699 Thereafter $2,757
Short-Term Debt Outstanding	Short-term Debt Obligations ($ in millions) 2021 2020 Various, weighted average 0.7% and 1.7% as of December 31, 2021 and 2020, respectively. $6 $403

Financial Instruments, Hedgin_2

Financial Instruments, Hedging Activities and Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value, Cash Flow and Net Investment Hedges	The following table summarizes the location within the consolidated financial statements and amount of gains/(losses) related to derivative and debt financial instruments for the years ended December 31, 2021, 2020 and 2019. All dollar amounts are shown on a pretax basis. 2021 2020 2019 Caption in Consolidated Statement of Income ($ in millions) Gain Deferred in AOCL Gain Recognized Loss Deferred in AOCL Gain Recognized Gain Deferred in AOCL Gain/(Loss) Recognized Fair Value Interest rate swaps $15 $12 $3 Interest expense Total Fair Value $15 $12 $3 Cash Flow Foreign currency forward contracts $— $— $— $— $2 ($3) Other charges and Cost of sales Total Cash Flow $— $— $— $— $2 ($3) Net Investment Cross currency swaps $53 $13 ($57) $16 $13 $18 Interest expense Foreign denominated debt 173 — (200) — 61 — Total Net Investment $226 $13 ($257) $16 $74 $18 Economic Foreign currency forward contracts $23 $30 $55 Other charges
Schedule of Derivative Liabilities at Fair Value	Assets and liabilities reported at fair value on a recurring basis December 31, 2021 December 31, 2020 ($ in millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Assets: Other current assets: Marketable equity securities $6 $— $— $6 $— $— Foreign currency forward contracts (a) — 28 — — 8 — Other assets: Cross currency swaps (b) $— $50 $— $— $13 $— Interest rate swaps (c) — 36 — — 67 — Investments: Marketable equity securities $98 $— $— $97 $— $— Liabilities: Accounts payable and accrued liabilities: Foreign currency forward contracts (a) $— $4 $— $— $6 $— Cross currency swaps (b) — — — — 8 — Other liabilities: Cross currency swap (b) $— $— $— $— $13 $—
Schedule of Long-term Debt Instruments	Long-term Debt Obligations ($ in millions) Maturity Date 2021 2020 9% non-callable debentures ($134) (1) 2021 — 134 0.875% notes (€600) 2022 — 732 3.2% notes ($300) (2) 2023 299 299 Term Loan Credit Agreement, due 2024 ($1,400) 2024 1,399 — 2.4% notes ($300) 2024 298 298 0.875% notes (€600) 2025 677 727 1.200% notes ($700) 2026 692 — 1.4% notes (€600) 2027 677 726 3.75% notes ($800) (3) 2028 811 813 2.5% notes (€80) 2029 90 94 2.8% notes ($300) 2029 298 299 2.55% notes ($300) 2030 296 296 7.70% notes ($176) 2038 174 174 5.5% notes ($250) 2040 247 247 3.0% notes (€120) 2044 130 139 Commercial paper Various 440 250 Various other non-U.S. debt (4) Various 1 38 Finance lease obligations Various 10 12 Impact of derivatives on debt (1)(5) N/A 36 68 Total $6,575 $5,346 Less payments due within one year N/A 3 175 Long-term debt $6,572 $5,171 (1) PPG entered into several interest rate swaps, which were subsequently settled in prior periods. The impact of these settlements was amortized over the life of the debentures as a reduction to interest expense. These interest rate swaps were terminated in 2021. The weighted average interest rate for these borrowings was 8.8% and 8.4% for the years ended December 31, 2021 and 2020, respectively. (2) In February 2018, PPG entered into interest rate swaps which converted $150 million of the notes from a fixed interest rate to a floating interest rate based on the three month London Interbank Offered Rate (LIBOR). The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 0.6% and 1.2% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (3) In February 2018, PPG entered into interest rate swaps which converted $375 million of the notes from a fixed interest rate to a floating interest rate based on the three month LIBOR. The impact of the derivative on the notes represents the fair value adjustment of the debt. The average effective interest rate for the portion of the notes impacted by the swaps was 1.0% and 1.6% as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. (4) Weighted average interest rate of 3.1% and 3.8% as of December 31, 2021 and 2020, respectively. (5) Fair value adjustment of the 3.2% $300 million notes and 3.75% $800 million notes as a result of fair value hedge accounting treatment related to the outstanding interest rate swaps as of December 31, 2021 and 2020, respectively. Refer to Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements” for additional information. Long-Term Debt ($ in millions) December 31, 2021 (a) December 31, 2020 (b) Long-term debt - carrying value $6,565 $5,334 Long-term debt - fair value $6,958 $5,913 (a) Excluding finance lease obligations of $10 million and short term borrowings of $6 million as of December 31, 2021.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Common Share Calculations	($ in millions, except per share amounts) 2021 2020 2019 Earnings per common share (attributable to PPG) Income from continuing operations, net of tax $1,420 $1,056 $1,243 Income from discontinued operations, net of tax 19 3 — Net income (attributable to PPG) $1,439 $1,059 $1,243 Weighted average common shares outstanding 237.6 236.8 236.9 Effect of dilutive securities: Stock options 1.0 0.4 0.6 Other stock compensation plans 0.8 0.7 0.7 Potentially dilutive common shares 1.8 1.1 1.3 Adjusted weighted average common shares outstanding 239.4 237.9 238.2 Earnings per common share (attributable to PPG) Income from continuing operations, net of tax $5.98 $4.46 $5.25 Income from discontinued operations, net of tax 0.08 0.01 — Net income (attributable to PPG) $6.06 $4.47 $5.25 Earnings per common share - assuming dilution (attributable to PPG) Income from continuing operations, net of tax $5.93 $4.44 $5.22 Income from discontinued operations, net of tax 0.08 0.01 — Net income (attributable to PPG) $6.01 $4.45 $5.22

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Components of Income Tax Expense	The provision for income taxes by taxing jurisdiction and by significant components consisted of the following: ($ in millions) 2021 2020 2019 Current U.S. federal $25 $12 $86 U.S. state and local 13 6 15 Foreign 301 320 296 Total current income tax expense $339 $338 $397 Deferred U.S. federal $12 $1 ($1) U.S. state and local 3 (3) 13 Foreign 20 (45) (17) Total deferred income tax expense/(benefit) $35 ($47) ($5) Total income tax expense $374 $291 $392
Reconciliation of Statutory U.S. Corporate Federal Income Tax Rate to Effective Income Tax Rate	A reconciliation of the statutory U.S. corporate federal income tax rate to the Company’s effective tax rate follows: 2021 2020 2019 U.S. federal income tax rate 21.0 % 21.0 % 21.0 % Changes in rate due to: Taxes on non-U.S. earnings 2.7 3.3 2.9 U.S. state and local taxes 0.8 0.3 1.3 U.S. tax (benefit)/cost on foreign dividends (1.6) 0.1 (0.9) Tax benefits from equity awards (0.3) (0.4) — Change in valuation allowance reserves — (1.4) — U.S. tax incentives (0.6) (0.9) (0.7) U.S. tax cost - Tax Cuts & Jobs Act — — 0.3 Uncertain tax positions (1.4) 0.9 0.3 Other — (1.5) (0.6) Effective income tax rate 20.6 % 21.4 % 23.6 %
Net deferred income tax assets and liabilities	($ in millions) 2021 2020 Deferred income tax assets related to Employee benefits $386 $439 Contingent and accrued liabilities 74 118 Operating loss and other carry-forwards 278 293 Operating lease liabilities 215 209 Research and development amortization 68 — Other 121 197 Valuation allowance (172) (167) Total $970 $1,089 Deferred income tax liabilities related to Property $278 $240 Intangibles 814 663 Employee benefits 75 37 Operating lease right-of-use assets 216 206 Other 36 16 Total $1,419 $1,162 Deferred income tax liabilities – net ($449) ($73)
Summary of Operating Loss Carryforwards	($ in millions) 2021 2020 Expiration Available net operating loss carryforwards, tax effected: Indefinite expiration $106 $113 NA Definite expiration 77 80 2022-2041 Total $183 $193 Income tax credit carryforwards $115 $119 2022-2041
Unrecognized Tax Benefits	A reconciliation of the total amounts of unrecognized tax benefits (excluding interest and penalties) as of December 31 follows: ($ in millions) 2021 2020 2019 January 1 $175 $167 $166 Current year tax positions - additions 12 25 25 Prior year tax positions - additions 10 5 4 Prior year tax positions - reductions (2) (2) (9) Statute of limitations expirations (19) (8) (6) Settlements (21) (11) (12) Foreign currency translation 3 (1) (1) December 31 $158 $175 $167 Interest and penalties ($ in millions) 2021 2020 2019 Accrued interest and penalties related to unrecognized tax benefits $17 $18 $17 (Income)/loss recognized in income tax expense related to interest and penalties ($2) $2 $1

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Changes in Projected Benefit Obligations, Plan Assets and Funded Status	The following table sets forth the changes in projected benefit obligations (“PBO”), plan assets, the funded status and the amounts recognized on the accompanying consolidated balance sheet for the Company’s defined benefit pension and other postretirement benefit plans: Defined Benefit Pension Plans United States International Total PPG ($ in millions) 2021 2020 2021 2020 2021 2020 Projected benefit obligation, January 1 $2,042 $1,842 $1,933 $1,719 $3,975 $3,561 Service cost — 13 9 11 9 24 Interest cost 39 54 26 33 65 87 Actuarial (gains)/losses - net (72) 251 (91) 165 (163) 416 Benefits paid (89) (133) (60) (60) (149) (193) Acquisitions — — 48 — 48 — Foreign currency translation adjustments — — (51) 87 (51) 87 Settlements and curtailments — 13 (198) (19) (198) (6) Other — 2 (2) (3) (2) (1) Projected benefit obligation, December 31 $1,920 $2,042 $1,614 $1,933 $3,534 $3,975 Market value of plan assets, January 1 $1,335 $1,304 $1,881 $1,661 $3,216 $2,965 Actual return on plan assets 66 144 42 198 108 342 Company contributions — — 10 17 10 17 Benefits paid (72) (113) (51) (51) (123) (164) Acquisitions — — 3 — 3 — Plan settlements — — (198) (19) (198) (19) Foreign currency translation adjustments — — (38) 78 (38) 78 Other — — (3) (3) (3) (3) Market value of plan assets, December 31 $1,329 $1,335 $1,646 $1,881 $2,975 $3,216 Funded Status ($591) ($707) $32 ($52) ($559) ($759) Amounts recognized in the Consolidated Balance Sheet: Other assets (long-term) — — 310 218 310 218 Accounts payable and accrued liabilities (23) (23) (12) (9) (35) (32) Accrued pensions (568) (684) (266) (261) (834) (945) Net (liability)/asset recognized ($591) ($707) $32 ($52) ($559) ($759) Other Postretirement Benefit Plans United States International Total PPG ($ in millions) 2021 2020 2021 2020 2021 2020 Projected benefit obligation, January 1 $682 $616 $104 $96 $786 $712 Service cost 11 9 1 1 12 10 Interest cost 12 17 2 3 14 20 Plan amendments — 4 — — — 4 Actuarial (gains)/losses - net (33) 75 (10) 7 (43) 82 Benefits paid (41) (39) (4) (5) (45) (44) Foreign currency translation adjustments — — — 2 — 2 Projected benefit obligation, December 31 $631 $682 $93 $104 $724 $786 Amounts recognized in the Consolidated Balance Sheet: Accounts payable and accrued liabilities (47) (48) (5) (5) (52) (53) Other postretirement benefits (584) (634) (88) (99) (672) (733) Net liability recognized ($631) ($682) ($93) ($104) ($724) ($786) The PBO is the actuarial present value of benefits attributable to employee service rendered to date, including the effects of estimated future pay increases. The accumulated benefit obligation (“ABO”) is the actuarial present value of benefits attributable to employee service rendered to date, but does not include the effects of estimated future pay increases. The ABO for all defined benefit pension plans as of December 31, 2021 and 2020 was $3.5 billion and $3.8 billion, respectively. The following table details the pension plans where the benefit liability exceeds the fair value of the plan assets: Pensions ($ in millions) 2021 2020 Plans with PBO in Excess of Plan Assets: Projected benefit obligation $2,232 $2,478 Fair value of plan assets $1,366 $1,504 Plans with ABO in Excess of Plan Assets: Accumulated benefit obligation $2,197 $2,320 Fair value of plan assets $1,362 $1,383
Accumulated Other Comprehensive Loss Pretax Amounts Not Yet Reflected in Net Periodic Benefit Cost	Pensions Other Postretirement Benefits ($ in millions) 2021 2020 2021 2020 Accumulated net actuarial losses $857 $1,071 $170 $233 Accumulated prior service cost/(credit) 5 4 (21) (75) Total $862 $1,075 $149 $158
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	The net decrease in Accumulated other comprehensive loss (pretax) in 2021 relating to defined benefit pension and other postretirement benefits is primarily attributable to pension and other postretirement plan discount rate increases, as follows: ($ in millions) Pensions Other Postretirement Benefits Net actuarial gain arising during the year ($119) ($43) New prior service cost 1 — Amortization of actuarial loss (39) (20) Amortization of prior service credit — 54 Foreign currency translation adjustments (3) — Impact of settlements (53) — Net decrease ($213) ($9)
Net Periodic Benefit Cost	Pensions Other Postretirement Benefits ($ in millions) 2021 2020 2019 2021 2020 2019 Service cost $9 $24 $23 $12 $10 $8 Interest cost 65 87 105 14 20 26 Expected return on plan assets (152) (144) (139) — — — Amortization of prior service credit — — — (54) (59) (57) Amortization of actuarial losses 39 71 62 20 15 8 Settlements, curtailments, and special termination benefits 53 18 3 — — — Net periodic benefit cost/(income) $14 $56 $54 ($8) ($14) ($15)
Schedule of Contributions to Defined benefit Plans	Contributions to defined benefit pension plans ($ in millions) 2021 2020 2019 Non-U.S. defined benefit pension plans $10 $17 $13
Schedule of Expected Benefit Payments	The estimated benefits expected to be paid under the Company’s defined benefit pension and other postretirement benefit plans are: ($ in millions) Pensions Other Postretirement Benefits 2022 $155 $52 2023 $154 $50 2024 $158 $49 2025 $161 $48 2026 $162 $44 2027 to 2031 $839 $204
Weighted Average Target Pension Plan Asset Allocations	The following summarizes the weighted average target pension plan asset allocation as of December 31, 2021 and 2020 for all PPG defined benefit plans: Asset Category 2021 2020 Equity securities 15-45% 15-45% Debt securities 30-65% 30-65% Real estate 0-10% 0-10% Other 20-40% 20-40%
Fair Values of the Company's Pension Plan Assets by Asset Category	The fair values of the Company’s pension plan assets at December 31, 2021 and 2020, by asset category, are as follows: December 31, 2021 December 31, 2020 ($ in millions) Level 1 (1) Level 2 (1) Level 3 (1) Total Level 1 (1) Level 2 (1) Level 3 (1) Total Asset Category Equity securities: U.S. Large cap $79 $78 $— $157 $65 $94 $— $159 Small cap 48 — — 48 42 — — 42 Non-U.S. Developed and emerging markets (2) 130 76 — 206 144 80 — 224 Debt securities: Cash and cash equivalents 8 42 — 50 5 10 — 15 Corporate (3) U.S. (4) — 232 100 332 — 386 78 464 Developed and emerging markets (2) — 1 — 1 — 2 — 2 Diversified (5) — 57 — 57 — 126 — 126 Government U.S. (4) 68 13 — 81 82 20 — 102 Developed markets — 10 — 10 — 19 — 19 Other (6) — — 367 367 — — 421 421 Real estate, hedge funds, and other — 562 487 1,049 — 515 417 932 Total assets in the fair value hierarchy $333 $1,071 $954 $2,358 $338 $1,252 $916 $2,506 Common-collective trusts (7) — — — 617 — — — 710 Total Investments $333 $1,071 $954 $2,975 $338 $1,252 $916 $3,216 (1) These levels refer to the accounting guidance on fair value measurement described in Note 10, “Financial Instruments, Hedging Activities and Fair Value Measurements.” (2) These amounts represent holdings in investment grade debt or equity securities of issuers in both developed markets and emerging economies. (3) This category represents investment grade debt securities from a diverse set of industry issuers. (4) These investments are primarily long duration fixed income securities. (5) This category represents commingled funds invested in diverse portfolios of debt securities. (6) This category includes mortgage-backed and asset backed debt securities, municipal bonds and other debt securities including derivatives. (7) Certain investments that are measured at net asset value per share (or its equivalent) are not required to be classified in the fair value hierarchy.
Change in the Fair Value of the Company's Level 3 Pension Assets	The change in the fair value of the Company’s Level 3 pension assets for the years ended December 31, 2021 and 2020 was as follows: ($ in millions) Real Estate Other Debt Securities Hedge Funds and Other Assets Total January 1, 2020 $123 $377 $335 $835 Realized gains 4 24 2 30 Unrealized losses (5) — (2) (7) Transfers in/(out), net 1 (14) 28 15 Foreign currency gains 1 34 8 43 December 31, 2020 $124 $421 $371 $916 Realized gains/(losses) 3 (11) 9 1 Unrealized gains 22 — 8 30 Transfers in/(out), net 8 (14) 44 38 Foreign currency losses — (29) (2) (31) December 31, 2021 $157 $367 $430 $954
Benefit Obligations
Weighted Average Assumptions Used for the Defined Benefit Pension and Other Postretirement Plans	The following weighted average assumptions were used to determine the benefit obligation for the Company’s defined benefit pension and other postretirement plans as of December 31, 2021 and 2020: United States International Total PPG 2021 2020 2021 2020 2021 2020 Discount rate 2.8 % 2.4 % 2.0 % 1.6 % 2.5 % 2.1 % Rate of compensation increase 2.5 % 2.5 % 2.8 % 1.1 % 2.6 % 1.5 %
Benefit Costs
Weighted Average Assumptions Used for the Defined Benefit Pension and Other Postretirement Plans	The following weighted average assumptions were used to determine the net periodic benefit cost for the Company’s defined benefit pension and other postretirement benefit plans for the three years in the period ended December 31, 2021: 2021 2020 2019 Discount rate 2.1 % 2.8 % 3.7 % Expected return on assets 4.8 % 5.0 % 5.4 % Rate of compensation increase 1.5 % 2.6 % 1.8 %

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Schedule of Loss Contingencies by Contingency	Environmental Reserves ($ in millions) 2021 2020 New Jersey Chrome $89 $102 Glass and chemical 83 106 Other 110 92 Total $282 $300 Current Portion $97 $99
Environmental Costs	The pretax charges and cash outlays related to such environmental remediation in 2021, 2020 and 2019, were as follows: ($ in millions) 2021 2020 2019 New Jersey Chrome $25 $15 $43 Glass and chemical 12 15 12 Other 7 8 22 Total $44 $38 $77 Cash outlays for environmental spending $56 $60 $77

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Summary of Shares Outstanding	Common Stock Treasury Stock Shares Outstanding January 1, 2019 581,146,136 (345,284,702) 235,861,434 Purchases — (2,722,800) (2,722,800) Issuances — 2,541,836 2,541,836 December 31, 2019 581,146,136 (345,465,666) 235,680,470 Issuances — 1,005,795 1,005,795 December 31, 2020 581,146,136 (344,459,871) 236,686,265 Purchases — (1,521,765) (1,521,765) Issuances — 742,526 742,526 December 31, 2021 581,146,136 (345,239,110) 235,907,026

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Loss	($ in millions) Foreign Currency Translation Adjustments (1) Pension and Other Postretirement Benefit Adjustments, net of tax (2) Unrealized Gain/(Loss) on Derivatives, net of tax Accumulated Other Comprehensive Loss January 1, 2019 ($1,734) ($568) $2 ($2,300) Current year deferrals to AOCL 107 (167) 1 (59) Reclassifications from AOCL to net income — 11 (2) 9 December 31, 2019 ($1,627) ($724) $1 ($2,350) Current year deferrals to AOCL (36) (237) — (273) Reclassifications from AOCL to net income — 24 — 24 December 31, 2020 ($1,663) ($937) $1 ($2,599) Current year deferrals to AOCL (325) 132 — (193) Reclassifications from AOCL to net income — 42 — 42 December 31, 2021 ($1,988) ($763) $1 ($2,750) (1) The tax cost/(benefit) related to unrealized foreign currency translation adjustments on tax inter-branch transactions and net investment hedges as of December 31, 2021, 2020 and 2019 was $55 million, $(6) million and $19 million, respectively. (2) The tax cost/(benefit) related to the adjustment for pension and other postretirement benefits as of December 31, 2021, 2020 and 2019 was $48 million, $(70) million and $(57) million, respectively. Reclassifications from AOCI are included in the computation of net periodic benefit costs (see Note 13, “Employee Benefit Plans").

Other Income (Tables)

Other Income (Tables)	12 Months Ended
	Dec. 31, 2021
Other Income and Expenses [Abstract]
Components of Other Earnings	($ in millions) 2021 2020 2019 Gain on sale of assets (1) $47 $5 $7 Royalty income 8 7 8 Share of net earnings of equity affiliates (See Note 5) 15 8 11 Income from legal settlements 22 — — Other 80 48 63 Total $172 $68 $89 (1) In 2021, PPG recognized a $34 million gain on the sale of a production facility in connection with the Company’s manufacturing footprint consolidation plans and associated restructuring programs.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-based Compensation, Stock Options, Activity	($ in millions) 2021 2020 2019 Total stock-based compensation $57 $44 $39 Income tax benefit recognized $12 $10 $9
Weighted Average Assumptions Used in Calculating the Fair Value of Stock Option	The following weighted average assumptions were used to calculate the fair values of stock option grants in each year: 2021 2020 2019 Weighted average exercise price $136.60 $119.52 $109.74 Risk free interest rate 1.0 % 1.6 % 2.6 % Expected life of option in years 6.5 6.5 6.5 Expected dividend yield 1.6 % 1.5 % 1.6 % Expected volatility 25.3 % 20.0 % 20.0 %
Stock Options Outstanding, Exercisable and Activity	Stock Options Outstanding and Exercisable Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in years) Intrinsic Value (in millions) Outstanding, January 1, 2021 3,371,282 $104.18 6.2 $135 Granted 527,464 $136.60 Exercised (510,864) $91.77 Forfeited/Expired (47,480) $120.01 Outstanding, December 31, 2021 3,340,402 $110.98 6.1 $205 Vested or expected to vest, December 31, 2021 3,245,875 $110.45 6.0 $201 Exercisable, December 31, 2021 1,687,933 $100.46 4.1 $121
Stock Option Activity	The following table presents stock option activity for the years ended December 31, 2021, 2020 and 2019: ($ in millions) 2021 2020 2019 Total intrinsic value of stock options exercised $32 $31 $38 Cash received from stock option exercises $47 $54 $61 Income tax benefit from the exercise of stock options $8 $7 $9 Total fair value of stock options vested $11 $11 $12
RSU Activity	RSU Activity Number of Shares Weighted Average Fair Value Intrinsic Value (in millions) Outstanding, January 1, 2021 591,929 $113.74 $67 Granted 263,911 $120.89 Released from restrictions (215,208) $142.21 Forfeited (18,577) $122.32 Outstanding, December 31, 2021 622,055 $125.92 $78 Vested or expected to vest, December 31, 2021 592,068 $125.60 $73

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Geographic Areas	Net sales by segment and region for the years ended December 31, 2021, 2020 and 2019 were as follows: ($ in millions) 2021 2020 2019 Performance Coatings United States and Canada $4,366 $3,673 $4,057 EMEA 3,582 2,861 2,869 Asia Pacific 1,254 1,015 1,095 Latin America 1,131 946 1,013 Total $10,333 $8,495 $9,034 Industrial Coatings United States and Canada $2,310 $1,995 $2,418 EMEA 1,854 1,467 1,680 Asia Pacific 1,723 1,416 1,447 Latin America 582 461 567 Total $6,469 $5,339 $6,112 Total Net Sales (1) United States and Canada $6,676 $5,668 $6,475 EMEA 5,436 4,328 4,549 Asia Pacific 2,977 2,431 2,542 Latin America 1,713 1,407 1,580 Total PPG $16,802 $13,834 $15,146 (1) Net sales to external customers are attributed to geographic regions based upon the location of the operating unit shipping the product.
Accounts Receivable, Allowance for Credit Loss	The following table summarizes allowance for doubtful accounts activity for the years ended December 31, 2021 and 2020: Trade Receivables Allowance for Doubtful Accounts ($ in millions) 2021 2020 January 1 $44 $22 Bad debt expense 19 14 Change in allowance for doubtful accounts related to COVID-19 (1) (14) 30 Trade receivables written off as uncollectible, net of recoveries (18) (22) December 31 $31 $44

Reportable Business Segment I_2

Reportable Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Reportable Business Segment	($ in millions) 2021 2020 2019 Net sales to external customers Performance Coatings $10,333 $8,495 $9,034 Industrial Coatings 6,469 5,339 6,112 Total Net sales $16,802 $13,834 $15,146 Segment income Performance Coatings $1,491 $1,359 $1,409 Industrial Coatings 680 750 862 Total Segment income $2,171 $2,109 $2,271 Corporate / Non-Segment Items Corporate unallocated (194) (233) (198) Interest expense, net of interest income (95) (115) (100) Acquisition-related costs, net (1) (86) (9) (17) Pension settlement charge (50) — — Environmental remediation charges, net (35) (26) (61) Business restructuring-related costs, net (2) (27) (224) (222) Impairment charges (3) (21) (93) — Expense incurred due to natural disasters (4) (17) (17) — Change in allowance for doubtful accounts related to COVID-19 14 (30) — Income from legal settlements 22 — — Asbestos-related claims reserve adjustment (5) 133 — (12) Total Income before income taxes $1,815 $1,362 $1,661 ($ in millions) 2021 2020 2019 Depreciation and amortization Performance Coatings $308 $251 $255 Industrial Coatings 212 200 194 Corporate / Non-Segment Items 41 58 62 Total $561 $509 $511 Share of net earnings of equity affiliates Performance Coatings $5 $3 $1 Corporate / Non-Segment Items 10 5 10 Total $15 $8 $11 Segment assets (6) Performance Coatings $13,395 $11,551 $10,636 Industrial Coatings 5,807 5,040 4,912 Corporate / Non-Segment Items 2,149 2,965 2,160 Total $21,351 $19,556 $17,708 Investment in equity affiliates Performance Coatings $33 $31 $33 Industrial Coatings 15 15 14 Corporate / Non-Segment Items 78 74 82 Total $126 $120 $129 Expenditures for property (including business acquisitions) Performance Coatings $1,698 $1,293 $483 Industrial Coatings 784 166 510 Corporate / Non-Segment Items 26 14 63 Total $2,508 $1,473 $1,056
Geographic Information	($ in millions) 2021 2020 2019 Geographic Information Segment income United States and Canada $865 $855 $1,073 EMEA 612 572 569 Asia Pacific 354 382 342 Latin America 340 300 287 Total $2,171 $2,109 $2,271 Property, plant and equipment — net United States and Canada $1,377 $1,351 $1,300 EMEA 1,069 857 836 Asia Pacific 702 623 538 Latin America 294 296 309 Total $3,442 $3,127 $2,983 (1) Acquisition-related costs, net include advisory, legal, accounting, valuation, other professional or consulting fees, and certain internal costs directly incurred to effect acquisitions. These costs are included in Selling, general and administrative expense in the consolidated statement of income. Acquisition-related costs, net also include the impact for the step up to fair value of inventory acquired in certain acquisitions which are included in Cost of Sales, exclusive of depreciation and amortization in the consolidated statement of income. (2) Included in business restructuring-related costs, net are business restructuring charges, accelerated depreciation of certain assets and other related costs, offset by releases related to previously approved programs and a $34 million gain on the sale of certain assets in 2021 in connection with the Company’s manufacturing footprint consolidation plans and associated restructuring programs. This gain is included in Other income in the consolidated statement of income. (3) In 2021 and 2020, impairment charges were recorded for the write-down of certain assets related to the previously planned sale of certain smaller entities in non-strategic regions. Also in 2020, an impairment charge was recorded to reduce the carrying value of an indefinite-lived trademark. (4) In 2020, two hurricanes damaged a southern U.S. factory supporting the Company's specialty coatings and materials business. In early 2021, a winter storm further damaged that factory as well as other company factories in the southern U.S. Incremental expenses incurred due to these storms included costs related to maintenance and repairs of damaged property, freight and utility premiums and other incremental expenses directly related to the impacted areas . (5) In the fourth quarter 2021, the reserve for asbestos-related claims was reduced to reflect the Company’s current estimate of potential liability for these claims. (6) Segment assets are the total assets used in the operation of each segment. Corporate assets are principally cash and cash equivalents, cash held in escrow, short term investments and deferred tax assets.

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Additional Information) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)Segment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising costs expensed	$ 243	$ 223	$ 283
Research and development – total	463	401	456
Less: depreciation on research facilities	24	22	24
Research and development, net	$ 439	379	$ 432
Number of operating segments | Segment	10
Asset retirement obligation	$ 22	$ 21
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 38
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Identifiable intangible assets with finite lives estimated useful lives	1 year
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Identifiable intangible assets with finite lives estimated useful lives	30 years

Acquisitions and Dispositions_2

Acquisitions and Dispositions (Acquistions) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jun. 10, 2021	Jun. 09, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill	$ 6,248			$ 5,102	$ 4,470
Tikkurila
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%	97.10%	9.30%
Payments to Acquire Businesses, Gross	$ 1,700
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	199
Goodwill	1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	601
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	110
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets	405
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 196
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Percentage of sales from acquired entities	2.00%

Acquisitions and Dispositions_3

Acquisitions and Dispositions (Divestitures, Major Classes of Assets and Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges	$ 21	$ 93	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges	21	52
Cash and cash equivalents	13	20
Receivables	0	5
Inventories	0	5
Assets held for sale	13	30
Accounts payable and accrued liabilities	13	14
Operating lease liabilities	5	6
Deferred income taxes	2	3
Other liabilities	1	1
Liabilities held for sale	$ 21	$ 24

Acquisitions and Dispositions_4

Acquisitions and Dispositions (Divestitures, Glass Segment) (Details) - Glass Segment $ in Millions	3 Months Ended
	Dec. 31, 2021USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, before tax	$ 25
Income from discontinued operations, net of tax	$ 19

Working Capital Detail (Detail)

Working Capital Detail (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Disclosure Components Of Working Capital Detail [Abstract]
Trade - net	$ 2,687	$ 2,412
Other - net	465	314
Total	3,152	2,726
Finished products	1,175	1,021
Work in process	234	187
Raw materials	723	490
Supplies	39	37
Total	2,171	1,735
Trade	2,734	2,259
Accrued payroll	534	505
Customer rebates	368	320
Other postretirement and pension benefits	87	85
Income taxes	36	46
Other	633	577
Total	$ 4,392	$ 3,792

Working Capital Detail (Additio

Working Capital Detail (Additional Information) (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Components Of Working Capital Detail [Abstract]
Allowance for doubtful accounts	$ 31	$ 44	$ 22
Percentage of inventories valued using the LIFO method	29.00%	33.00%
FIFO adjustment	$ 174	$ 110

Property, Plant and Equipment_2

Property, Plant and Equipment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 7,974	$ 7,476
Accumulated depreciation, depletion and amortization, property, plant, and equipment	4,532	4,349
Property, plant and equipment, net	3,442	3,127	$ 2,983
Land and land improvements
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 570	541
Land and land improvements | Minimum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	1 year
Land and land improvements | Maximum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	30 years
Buildings
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 1,769	1,673
Buildings | Minimum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	20 years
Buildings | Maximum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	40 years
Machinery and equipment
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 3,949	3,794
Machinery and equipment | Minimum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	5 years
Machinery and equipment | Maximum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	25 years
Other
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 1,177	1,123
Other | Minimum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	3 years
Other | Maximum
Property, Plant, and Equipment Disclosure [Line Items]
Property useful lives	20 years
Construction in progress
Property, Plant, and Equipment Disclosure [Line Items]
Property	$ 509	$ 345

Investments (Detail)

Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Investments	$ 274	$ 267
Equity in undistributed earnings losses of subsidiaries	15	8	$ 11
Proceeds from dividends received	9	18	$ 15
Investments in equity affiliates
Debt and Equity Securities, FV-NI [Line Items]
Investments	126	120
Marketable equity securities (See Note 10) | Trading Securities
Debt and Equity Securities, FV-NI [Line Items]
Investments	98	97
Other
Debt and Equity Securities, FV-NI [Line Items]
Investments	$ 50	$ 50
Investments In Other Operating Joint Venture | Minimum
Debt and Equity Securities, FV-NI [Line Items]
Percentage of ownership interests	20.00%
Investments In Other Operating Joint Venture | Maximum
Debt and Equity Securities, FV-NI [Line Items]
Percentage of ownership interests	50.00%

Goodwill and Other Identifiab_3

Goodwill and Other Identifiable Intangible Assets (Carrying Amount of Goodwill Attributable to Each Reportable Segment) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Beginning Balance	$ 5,102	$ 4,470
Goodwill from acquisitions	1,365	534
Goodwill, Impairment Loss		(5)
Currency translation	(219)	103
Ending Balance	6,248	5,102
Performance Coatings Segment [Member]
Goodwill [Roll Forward]
Beginning Balance	4,023	3,442
Goodwill from acquisitions	1,188	519
Goodwill, Impairment Loss		(5)
Currency translation	(177)	67
Ending Balance	5,034	4,023
Industrial Coatings Segment
Goodwill [Roll Forward]
Beginning Balance	1,079	1,028
Goodwill from acquisitions	177	15
Goodwill, Impairment Loss		0
Currency translation	(42)	36
Ending Balance	$ 1,214	$ 1,079

Goodwill and Other Identifiab_4

Goodwill and Other Identifiable Intangible Assets (Identifiable Intangible Assets with Finite Lives) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount of acquired trademarks with indefinite lives	$ 1,449	$ 1,101
Gross carrying amount	3,205	3,003
Accumulated amortization	(1,871)	(1,753)
Net	1,334	1,250
Intangible assets, gross (excluding goodwill)	4,654	4,104
Intangible assets, accumulated amortization (excluding goodwill)		1,753
Total Identifiable Intangible Assets	2,783	2,351
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	38
Aggregate amortization expense of identifiable intangible assets	172	138	$ 136
Estimated future amortization of identifiable intangible assets in 2022	180
Estimated future amortization of identifiable intangible assets in 2023	165
Estimated future amortization of identifiable intangible assets in 2024	150
Estimated future amortization of identifiable intangible assets in 2025	135
Estimated future amortization of identifiable intangible assets in 2026	115
Acquired technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	862	813
Accumulated amortization	(616)	(585)
Net	246	228
Customer-related
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,956	1,849
Accumulated amortization	(1,064)	(994)
Net	892	855
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	336	277
Accumulated amortization	(144)	(129)
Net	192	148
Other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	51	64
Accumulated amortization	(47)	(45)
Net	$ 4	$ 19

Business Restructuring (Additio

Business Restructuring (Additional Information) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Beginning balance	$ 293	$ 224
Business restructuring	31	174	$ 176
Payments for restructuring	(77)	(126)	(58)
Restructuring reserve, foreign currency translation gain (loss)	(16)	21
Ending balance	231	293	$ 224
Restructuring Charges
Restructuring Reserve [Roll Forward]
Business restructuring	54	203
Restructuring reserve, release of previously approved programs	$ 23	$ 29

Leases - Schedule of Components

Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 260	$ 240	$ 232
Finance lease cost:
Interest on lease liabilities	1	1	1
Amortization of right-of-use assets	2	2	2
Total finance lease cost	3	3	3
Total lease cost	263	243	235
Variable lease costs	18	17	15
Short-term lease costs	16	8	5
Cost of sales, exclusive of depreciation and amortization
Lessee, Lease, Description [Line Items]
Total operating lease cost	41	34	34
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 219	$ 206	$ 198

Leases - Schedule of Classifica

Leases - Schedule of Classification on the Condensed Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets:
Operating	$ 891	$ 847
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment, net	Property, plant and equipment, net
Finance	$ 13	$ 17
Total leased assets	904	864
Current
Operating	$ 192	$ 180
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Debt, Current	Debt, Current
Finance	$ 3	$ 3
Noncurrent
Operating	$ 693	$ 677
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Finance	$ 7	$ 9
Total lease liabilities	895	869
Finance lease ROU asset, accumulated depreciation	$ 13	$ 13

Leases - Schedule of Cash Paid

Leases - Schedule of Cash Paid for Lease Liabilities and Right-of-Use Assets Obtained in Exchange for Lease Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 224	$ 212	$ 210
Operating cash flows from finance leases	1	1	1
Financing cash flows from finance leases	3	2	4
Operating leases	253	227	219
Finance leases	$ 0	$ 4	$ 1

Leases - Schedule of Weighted-A

Leases - Schedule of Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate (Details)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted-average remaining lease term, operating leases	7 years 1 month 6 days	7 years 4 months 24 days	7 years 4 months 24 days
Weighted-average remaining lease term, finance leases	6 years 4 months 24 days	6 years 1 month 6 days	6 years 2 months 12 days
Weighted-average discount rate, operating leases	2.10%	2.40%	3.00%
Weighted-average discount rate, finance leases	5.80%	7.00%	9.40%

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 210
2023	170
2024	133
2025	103
2026	80
Thereafter	262
Total lease payments	958
Less: Interest	73
Total lease obligations	885
Finance Leases
2022	3
2023	3
2024	2
2025	1
2026	1
Total lease payments	12
Less: Interest	2
Thereafter	2
Finance lease liability	$ 10	$ 12

Borrowings and Lines of Credi_2

Borrowings and Lines of Credit (Long-term Debt Obligations) (Details) € in Millions	Aug. 31, 2020USD ($)	Aug. 30, 2019USD ($)	Aug. 15, 2019USD ($)	Dec. 31, 2021USD ($)	Jun. 30, 2021USD ($)	Mar. 31, 2021USD ($)	Aug. 31, 2020USD ($)	Jun. 30, 2020USD ($)	May 30, 2020USD ($)	Nov. 30, 2019USD ($)	Aug. 31, 2019USD ($)	Jun. 30, 2021USD ($)instrument	Sep. 30, 2020USD ($)	Dec. 31, 2021EUR (€)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Feb. 28, 2021USD ($)	May 31, 2020	Feb. 28, 2018USD ($)
Debt Instrument [Line Items]
Long-term debt				$ 6,565,000,000											$ 6,565,000,000	$ 5,334,000,000
Line of credit, amount outstanding				0											0	0
Finance lease obligation				10,000,000											10,000,000	12,000,000
Long-term debt and finance lease obligations				6,575,000,000											6,575,000,000	5,346,000,000
Less payments due within one year				3,000,000											3,000,000	175,000,000
Long-term debt				$ 6,572,000,000											$ 6,572,000,000	5,171,000,000
Effective interest rates				1.10%											1.10%
Repayments of debt										$ 634,000,000		$ 170,000,000			$ 850,000,000	504,000,000	$ 637,000,000
Line of Credit Facility, Maximum Borrowing Capacity		$ 2,200,000,000
Line of credit facility, additional borrowing capacity available		$ 750,000,000
Proceeds from Issuance of Debt						$ 692,000,000	$ 119,000,000		$ 296,000,000				$ 595,000,000
Debt Instrument, Covenant, Total Indebtedness To Total Capitalization Ratio, Maximum, Percentage											0.60
Debt Instrument, Covenant, Acquisition For Consideration, Minimum Threshold											$ 1,000,000,000
Debt Instrument, Covenant, Total Indebtedness To Total Capitalization Ratio, Maximum When Acquisition For Consideration Threshold Is Met, Percentage											0.65
Debt Instrument, Total Indebtedness To Total Capitalization, Percentage														0.48	0.48
Debt Instrument, Number of Obligations Matured | instrument												2
Proceeds from revolving credit facility															$ 0	800,000,000	0
Notes 0.00% Due 2019
Debt Instrument [Line Items]
Notional amount of non-derivative instruments																$ 300,000,000
Debt instrument, interest rate, stated percentage																0.00%
Notes 2.3 Percent Due 2019
Debt Instrument [Line Items]
Notional amount of non-derivative instruments																$ 300,000,000
Debt instrument, interest rate, stated percentage																2.30%
Notes 3.6 Percent Due 2020
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				3.60%											3.60%
Debt Instrument, Redemption Charge, Make-Whole Cash Premium								$ 6,000,000
Gain (Loss) on Extinguishment of Debt								7,000,000
Write off of Deferred Debt Issuance Cost								1,000,000
Repayments of Unsecured Debt								$ 500,000,000
Non-callable Debentures 9 Percent Due 2021
Debt Instrument [Line Items]
Long-term debt				$ 0	$ 134,000,000							$ 134,000,000			$ 0	$ 134,000,000
Debt instrument, interest rate, stated percentage				9.00%	9.00%							9.00%			9.00%
Notes 0.875 Percent Due 2022
Debt Instrument [Line Items]
Long-term debt				$ 0											$ 0	732,000,000
Notional amount of non-derivative instruments | €														€ 600
Debt instrument, interest rate, stated percentage				0.875%											0.875%
3.2% Notes due 2023
Debt Instrument [Line Items]
Long-term debt				$ 299,000,000											$ 299,000,000	$ 299,000,000
Effective interest rates				0.60%											0.60%	1.20%
Interest rate swaps																				$ 150,000,000
Notional amount of non-derivative instruments															$ 300,000,000
Debt instrument, interest rate, stated percentage				3.20%											3.20%
Term Loan Credit Agreement, due 2024
Debt Instrument [Line Items]
Long-term debt				$ 1,399,000,000											$ 1,399,000,000	$ 0
Debt Instrument, Face Amount																		$ 2,000,000,000
Proceeds from revolving credit facility				700,000,000	$ 700,000,000
2.4% Notes due 2024
Debt Instrument [Line Items]
Long-term debt				298,000,000											298,000,000	298,000,000
Notional amount of non-derivative instruments			$ 300,000,000
Debt instrument, interest rate, stated percentage			2.40%
Notes 0.875% Due 2025
Debt Instrument [Line Items]
Long-term debt				677,000,000											677,000,000	727,000,000
1.200% Notes due 2026
Debt Instrument [Line Items]
Long-term debt				692,000,000											692,000,000	0
Notional amount of non-derivative instruments						$ 700,000,000
Debt instrument, interest rate, stated percentage						1.20%
Debt Redemption Price Percent Of Principal Amount						101.00%
Notes 1.4 Percent Due 2027
Debt Instrument [Line Items]
Long-term debt				$ 677,000,000											$ 677,000,000	726,000,000
Debt instrument, interest rate, stated percentage				1.40%											1.40%
3.75% Notes due 2028
Debt Instrument [Line Items]
Long-term debt				$ 811,000,000											$ 811,000,000	$ 813,000,000
Effective interest rates				1.00%											1.00%	1.60%
Interest rate swaps																				$ 375,000,000
Notional amount of non-derivative instruments	$ 100,000,000														$ 800		$ 700,000,000
Debt instrument, interest rate, stated percentage				3.75%											3.75%	3.75%
Debt Redemption Price Percent Of Principal Amount	101.00%						101.00%
2.8% Notes due 2029
Debt Instrument [Line Items]
Long-term debt				$ 298,000,000											$ 298,000,000	$ 299,000,000
Notional amount of non-derivative instruments			$ 300,000,000
Debt instrument, interest rate, stated percentage			2.80%
2.55% Notes Due 2030 [Member]
Debt Instrument [Line Items]
Long-term debt				296,000,000											296,000,000	296,000,000
Notional amount of non-derivative instruments									$ 300,000,000
Debt instrument, interest rate, stated percentage																			2.55%
Debt Redemption Price Percent Of Principal Amount																			101.00%
Notes 2.5 Percent Due 2029
Debt Instrument [Line Items]
Long-term debt				$ 90,000,000											$ 90,000,000	94,000,000
Notional amount of non-derivative instruments | €														80
Debt instrument, interest rate, stated percentage				2.50%											2.50%
Notes 7.70 Percent Due 2038
Debt Instrument [Line Items]
Long-term debt				$ 174,000,000											$ 174,000,000	174,000,000
Debt instrument, interest rate, stated percentage				7.70%											7.70%
Notes 5.5 Percent Due 2040
Debt Instrument [Line Items]
Long-term debt				$ 247,000,000											$ 247,000,000	247,000,000
Debt instrument, interest rate, stated percentage				5.50%											5.50%
Notes 3.0 Percent Due 2044
Debt Instrument [Line Items]
Long-term debt				$ 130,000,000											$ 130,000,000	139,000,000
Notional amount of non-derivative instruments | €														€ 120
Debt instrument, interest rate, stated percentage				3.00%											3.00%
Commercial paper
Debt Instrument [Line Items]
Line of credit, amount outstanding				$ 440,000,000											$ 440,000,000	250,000,000
Long-term Commercial Paper, Noncurrent				440,000,000											440,000,000	250,000,000
Other Non-US Debt
Debt Instrument [Line Items]
Long-term debt				$ 1,000,000	$ 30,000,000							$ 30,000,000			$ 1,000,000	$ 38,000,000
Long-term debt, percentage bearing variable interest, percentage rate				3.10%											3.10%	3.80%
Impact Of Derivatives On Debt
Debt Instrument [Line Items]
Long-term debt				$ 36,000,000											$ 36,000,000	$ 68,000,000
Effective interest rates				8.80%											8.80%	8.40%
Minimum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.06%
Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.125%

Borrowings and Lines of Credi_3

Borrowings and Lines of Credit (Long-term Debt Maturities) (Details) $ in Millions	Dec. 31, 2021USD ($)
Debt Disclosure [Abstract]
Aggregate maturities of long-term debt, in 2022	$ 3
Aggregate maturities of long-term debt, in 2023	301
Aggregate maturities of long-term debt, in 2024	2,136
Aggregate maturities of long-term debt, in 2025	679
Aggregate maturities of long-term debt, in 2026	699
Aggregate maturities of long-term debt, Thereafter	$ 2,757

Borrowings and Lines of Credi_4

Borrowings and Lines of Credit (Short-term Debt Outstanding) (Detail) - USD ($) $ in Millions	1 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term borrowings		$ 6	$ 403
Weighted average interest rate		0.70%	1.70%
$1.5 billion 364-Day Term Loan [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 1,500
Debt Instrument, Term	364 days

Borrowings and Lines of Credi_5

Borrowings and Lines of Credit (Additional Information) (Details) - USD ($)	1 Months Ended			12 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Aug. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2021
Debt Instrument [Line Items]
Line of credit, amount outstanding				$ 0	$ 0
Outstanding letters of credit and surety bonds				173,000,000	134,000,000
Proceeds from revolving credit facility				0	800,000,000	$ 0
Repayments of Lines of Credit				0	800,000,000	0
Long-term debt				6,565,000,000	5,334,000,000
Repayments of Medium-term Notes				$ 400,000,000	1,100,000,000	$ 0
Non-callable Debentures 9 Percent Due 2021
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage				9.00%			9.00%
Long-term debt				$ 0	134,000,000		$ 134,000,000
Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Proceeds from revolving credit facility		$ 800,000,000
Repayments of Lines of Credit	$ 800,000,000
Debt Instrument, Term			5 years
Long-term debt				0	$ 0
Minimum
Debt Instrument [Line Items]
Periodic payment amount				50,000,000
International Operations
Debt Instrument [Line Items]
Lines of credit, current borrowing capacity				492,000,000
Line of credit, amount outstanding				$ 9,000,000

Financial Instruments, Hedgin_3

Financial Instruments, Hedging Activities and Fair Value Measurements (Additional Information) (Detail) € in Billions	12 Months Ended
	Dec. 31, 2021EUR (€)	Dec. 31, 2020EUR (€)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Feb. 28, 2018USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Finance lease liability			$ 10,000,000	$ 12,000,000
Fair Value of Debt Instrument Designated as a Hedge of Net Investment in Foreign Operations			1,600,000,000	2,400,000,000
Accumulated pretax unrealized translation gains			6,411,000,000	5,815,000,000	$ 5,403,000,000	$ 4,732,000,000
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure			0	0
Net Investment Hedging
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Nonderivative Instruments | €	€ 1.4	€ 2
Foreign Currency Contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Foreign Currency Contracts, Liability, Fair Value Disclosure			24,000,000
Foreign Currency Contracts, Liability, Fair Value Disclosure			2,000,000	2,000,000
Notional Amount of Derivative Instruments Designated as Net Investment Hedges			1,900,000,000	1,400,000,000
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivative Instruments Designated as Net Investment Hedges							$ 525,000,000
Interest Rate Derivatives, at Fair Value, Net			36,000,000	67,000,000
Cross Currency Swaps
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value, Net			50,000,000	8,000,000
Currency Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional Amount of Derivative Instruments Designated as Net Investment Hedges			775,000,000	875,000,000
Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Accumulated pretax unrealized translation gains			$ 204,000,000	$ 22,000,000

Financial Instruments, Hedgin_4

Financial Instruments, Hedging Activities and Fair Value Measurements (Fair Value, Cash Flow and Net Investment Hedges) (Detail) $ in Millions, € in Billions	12 Months Ended
	Dec. 31, 2021EUR (€)	Dec. 31, 2021USD ($)	Dec. 31, 2020EUR (€)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Derivatives, Fair Value [Line Items]
Derivative financial instruments					$ (1)
Fair Value Hedging
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized Amount		$ 15		$ 12	3
Fair Value Hedging | Foreign Currency Contracts | Interest expense
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized Amount		15		12	3
Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative financial instruments		0		0	2
Gain (Loss) Recognized Amount		0		0	(3)
Cash Flow Hedging | Foreign Currency Contracts | Other Expense
Derivatives, Fair Value [Line Items]
Derivative financial instruments		0		0	2
Gain (Loss) Recognized Amount		0		0	(3)
Net Investment Hedging
Derivatives, Fair Value [Line Items]
Notional Amount of Nonderivative Instruments | €	€ 1.4		€ 2
Derivative financial instruments		226		(257)	74
Gain (Loss) Recognized Amount		13		16	18
Net Investment Hedging | Currency Swap
Derivatives, Fair Value [Line Items]
Derivative financial instruments		53		(57)	13
Gain (Loss) Recognized Amount		13		16	18
Net Investment Hedging | Other Foreign Currency Denominated Debt
Derivatives, Fair Value [Line Items]
Derivative financial instruments		173		(200)	61
Economic Hedging | Foreign Currency Contracts | Other Expense
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized Amount		$ 23		$ 30	$ 55

Financial Instruments, Hedgin_5

Financial Instruments, Hedging Activities and Fair Value Measurements (Assets and Liabilities Reported at Fair Value on a Recurring Basis) (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Level 1 | Short-term Investments | Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets reported at fair value on a recurring basis	$ 6	$ 6
Level 1 | Investments | Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets reported at fair value on a recurring basis	98	97
Level 2 | Other Assets | Cross Currency Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets reported at fair value on a recurring basis	50	13
Liabilities reported at fair value on a recurring basis	0
Level 2 | Other Assets | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets reported at fair value on a recurring basis	36	67
Level 2 | Accounts Payable and Accrued Liabilities | Foreign Currency Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities reported at fair value on a recurring basis	4	6
Level 2 | Other Liabilities | Cross Currency Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities reported at fair value on a recurring basis	0	13
Not Designated as Hedging Instrument [Member] | Level 2 | Other Current Assets | Foreign Currency Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets reported at fair value on a recurring basis	$ 28	$ 8

Financial Instruments, Hedgin_6

Financial Instruments, Hedging Activities and Fair Value Measurements (Fair Value Additional Information) (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Long-term debt	$ 6,565	$ 5,334
Long-term debt (excluding capital lease obligations), fair values	6,958	5,913
Finance lease liability	10	12
Short-term borrowings	$ 6	$ 403

Earnings Per Common Share (Addi

Earnings Per Common Share (Additional Detail) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings per common share (attributable to PPG)
Income from continuing operations, net of tax	$ 1,420	$ 1,056	$ 1,243
Income from discontinued operations, net of tax	19	3	0
Net income (attributable to PPG)	$ 1,439	$ 1,059	$ 1,243
Weighted average common shares outstanding	237.6	236.8	236.9
Effect of dilutive securities:
Stock options	1	0.4	0.6
Other stock compensation plans	0.8	0.7	0.7
Potentially dilutive common shares	1.8	1.1	1.3
Adjusted weighted average common shares outstanding	239.4	237.9	238.2
Earnings per common share (attributable to PPG)
Continuing operations (in dollars per share)	$ 5.98	$ 4.46	$ 5.25
Discontinued operations (in dollars per share)	0.08	0.01	0
Net Income (attributable to PPG) (in dollars per share)	6.06	4.47	5.25
Earnings per common share - assuming dilution (attributable to PPG)
Continuing operations (in dollars per share)	5.93	4.44	5.22
Discontinued operations (in dollars per share)	0.08	0.01	0
Earnings per common share - assuming dilution (in dollars per share)	$ 6.01	$ 4.45	$ 5.22
Outstanding stock options excluded from the computation of diluted earnings per share due to their antidilutive effect	0	1.4	0.9

Income Taxes (Additional Inform

Income Taxes (Additional Information) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)subsidiaryjurisdiction	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Income Taxes [Line Items]
U.S. federal income tax rate	21.00%	21.00%	21.00%
Deferred income taxes	$ 35	$ (47)	$ (5)
Income before income taxes of non-US operations	1,815	1,362	1,661
Net operating loss carryforwards	183	193
Deferred Tax Assets, Tax Credit Carryforwards, Other	115	119
Unrecognized tax benefits that would affect the effective tax rate, if recognized	132
Accrued estimated interest and penalties on unrecognized tax benefits	17	18	17
Recognized (income) expense for estimated interest and penalties	(2)	2	1
Undistributed Earnings of Foreign Subsidiaries	$ 4,300	4,100
Number of taxable jurisdictions | jurisdiction	80
Number of PPG Subsidiaries | subsidiary	280
Income Tax, Potential U.S. Tax Cost for Repatriation of Foreign Earnings	$ 39	40
U.S.
Income Taxes [Line Items]
Deferred income taxes	66	30	22
Income before income taxes of non-US operations	469	190	596
Non United States
Income Taxes [Line Items]
Income before income taxes of non-US operations	1,346	1,172	$ 1,065
Net Operating Loss, Indefinite Life
Income Taxes [Line Items]
Net operating loss carryforwards	106	113
Net Operating Loss, Expiring Within 20 Years
Income Taxes [Line Items]
Net operating loss carryforwards	$ 77	$ 80

Income Taxes (Components of Inc

Income Taxes (Components of Income Tax Expense) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current income tax expense
U.S. federal	$ 25	$ 12	$ 86
U.S. State and local	13	6	15
Non-U.S.	301	320	296
Total current income tax	339	338	397
Deferred income tax expense
U.S. federal	12	1	(1)
U.S. State and local	3	(3)	13
Non-U.S.	20	(45)	(17)
Deferred Income Tax Expense (Benefit)	35	(47)	(5)
Total	$ 374	$ 291	$ 392

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of Statutory U.S. Corporate Federal Income Tax Rate to Effective Income Tax Rate) (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	21.00%	21.00%	21.00%
Changes in rate due to:
Taxes on non-U.S. earnings	2.70%	3.30%	2.90%
U.S. state and local taxes	0.80%	0.30%	1.30%
U.S. tax (benefit)/cost on foreign dividends	(1.60%)	0.10%	(0.90%)
Tax benefits from equity awards	(0.30%)	(0.40%)
Change in valuation allowance reserves	0.00%	(1.40%)	0.00%
U.S. tax incentives	(0.60%)	(0.90%)	(0.70%)
U.S. tax cost - Tax Cuts & Jobs Act	0	0	0.003
Uncertain tax positions	(1.40%)	0.90%	0.30%
Other		(1.50%)	(0.60%)
Effective income tax rate	20.60%	21.40%	23.60%

Income Taxes (Net Deferred Inco

Income Taxes (Net Deferred Income Tax Assets and Liabilities) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Examination [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 172	$ 167
Employee benefits	386	439
Contingent and accrued liabilities	74	118
Operating loss and other carry-forwards	278	293
Operating lease liabilities	215	209
Other	121	197
Deferred Tax Assets, Valuation Allowance	172	167
Deferred Tax Assets, Net of Valuation Allowance	970	1,089
Property	278	240
Intangibles	814	663
Employee benefits	75	37
Operating lease right-of-use assets	216	206
Other	36	16
Deferred Tax Liabilities, Gross	1,419	1,162
Deferred Tax Liabilities, Net	449	73
Income Tax, Potential U.S. Tax Cost for Repatriation of Foreign Earnings	39	40
Deferred income tax assets related to
Employee benefits	386	439
Contingent and accrued liabilities	74	118
Operating loss and other carry-forwards	278	293
Operating lease liabilities	215	209
Research and development amortization	68	0
Other	121	197
Valuation allowance	(172)	(167)
Total	970	1,089
Deferred income tax liabilities related to
Property	278	240
Intangibles	814	663
Employee benefits	75	37
Operating lease right-of-use assets	216	206
Other	36	16
Total	1,419	1,162
Deferred income tax liabilities – net	$ (449)	$ (73)
Minimum
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2022
Tax Credit Carryforward, Expiration Date	Dec. 31, 2022
Maximum
Income Tax Examination [Line Items]
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2041
Tax Credit Carryforward, Expiration Date	Dec. 31, 2041

Income Taxes (Unrecognized Tax

Income Taxes (Unrecognized Tax Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Undistributed Earnings of Foreign Subsidiaries	$ 4,300	$ 4,100
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	175	167	$ 166
Current year tax positions - additions	12	25	25
Prior year tax positions - additions	10	5	4
Prior year tax positions - reductions	(2)	(2)	(9)
Statute of limitations expirations	(19)	(8)	(6)
Settlements	(21)	(11)	(12)
Foreign currency translation	3	(1)	(1)
Ending balance	$ 158	$ 175	$ 167

Employee Benefit Plans (Additio

Employee Benefit Plans (Additional Information) (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 31, 2017	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension and Other Postretirement Benefits Disclosure [Line Items]
Pension settlement charge				$ 50	$ 13	$ 0
Reduction in projected benefit obligation due to non-cash settlement charge		$ 175
ABO for all defined benefit pension plans		$ 3,500		$ 3,500	$ 3,800
Return on plan assets assumption				4.80%	5.00%	5.40%
Impact on net periodic pension expense				$ 13
Weighted-average healthcare cost trend rate assumed for next fiscal year		5.10%		5.10%
Assumed ultimate health care cost trend rate		4.20%		4.20%
Aggregate PBO for the pension plans with PBO in excess of plan assets		$ 2,232		$ 2,232	$ 2,478
Aggregate fair value of plan assets for the pension plans with PBO in excess of plan assets		1,366		1,366	1,504
Aggregate ABO for the pension plans with ABO in excess of plan assets		2,197		2,197	2,320
Fair value of plan assets for the pension plans with ABO in excess of plan assets		1,362		1,362	1,383
Maximum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Estimated future mandatory contributions, low end of range		20		20
Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Impact on net periodic pension expense			$ 2
Weighted-average healthcare cost trend rate assumed for next fiscal year			5.40%
Assumed ultimate health care cost trend rate			4.00%
Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans				10	17
Defined Benefit Plan, Benefit Obligation, Benefits Paid				149	193
Net actuarial gain arising during the year				(119)
Estimated future benefit payments in 2022		155		155
Estimated future benefit payments in 2023		154		154
Estimated future benefit payments in 2024		158		158
Estimated future benefit payments in 2025		161		161
Estimated future benefit payments in 2026		162		162
Estimated aggregate future benefits payments for the five years thereafter		839		839
Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments				0	4
Defined Benefit Plan, Benefit Obligation, Benefits Paid				45	44
Net actuarial gain arising during the year				(43)
Estimated future benefit payments in 2022		52		52
Estimated future benefit payments in 2023		50		50
Estimated future benefit payments in 2024		49		49
Estimated future benefit payments in 2025		48		48
Estimated future benefit payments in 2026		44		44
Estimated aggregate future benefits payments for the five years thereafter		$ 204		$ 204
Other Postretirement Benefits | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Impact on net periodic pension expense			$ 6
Postretirement Health Coverage
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments	$ 306
Amortization reduction period	5 years 7 months 6 days
Welfare Benefits - U.S.
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of defined benefit pension plan assets market value		87.00%		87.00%
United States
Pension and Other Postretirement Benefits Disclosure [Line Items]
Return on plan assets assumption				7.40%
United States | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Return on plan assets assumption			7.40%
United States | Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans				$ 0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid				89	133
United States | Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments				0	4
Defined Benefit Plan, Benefit Obligation, Benefits Paid				41	39
International
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans				10	17	$ 13
International | Minimum
Pension and Other Postretirement Benefits Disclosure [Line Items]
Estimated future mandatory contributions, low end of range		$ 10		10
International | Scenario, Forecast
Pension and Other Postretirement Benefits Disclosure [Line Items]
Return on plan assets assumption			5.00%
International | Pension Plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Contributions to defined benefit pension plans				10	17
Defined Benefit Plan, Benefit Obligation, Benefits Paid				60	60
International | Other Postretirement Benefits
Pension and Other Postretirement Benefits Disclosure [Line Items]
Plan amendments				0	0
Defined Benefit Plan, Benefit Obligation, Benefits Paid				$ 4	$ 5
United States, Canada, Netherlands and United Kingdom
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of defined benefit pension plan assets market value		91.00%		91.00%

Employee Benefit Plans (Changes

Employee Benefit Plans (Changes in Projected Benefit Obligations, Plan Assets and Funded Status) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 3,216
End balance	2,975	$ 3,216
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(87)	(85)
Other postretirement benefits	(672)	(733)
Accrued pensions	(834)	(945)
Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	3,975	3,561
Service cost	9	24	$ 23
Interest cost	65	87	105
Actuarial (gains)/losses - net	(163)	416
Benefits paid	(149)	(193)
Defined Benefit Plan, Benefit Obligation, Business Combination	48	0
Foreign currency translation adjustments	(51)	87
Settlements and curtailments	(198)	(6)
Other	(2)	(1)
Projected benefit obligation, End of year	3,534	3,975	3,561
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	3,216	2,965
Actual return on plan assets	108	342
Company contributions	10	17
Benefits paid	(123)	(164)
Defined Benefit Plan, Plan Assets, Business Combination	3	0
Plan settlements	(198)	(19)
Foreign currency translation adjustments	(38)	78
Other	(3)	(3)
End balance	2,975	3,216	2,965
Funded Status	(559)	(759)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	310	218
Accounts payable and accrued liabilities	(35)	(32)
Accrued pensions	(834)	(945)
Net (liability)/asset recognized	(559)	(759)
Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	786	712
Service cost	12	10	8
Interest cost	14	20	26
Plan amendments	0	4
Actuarial (gains)/losses - net	(43)	82
Benefits paid	(45)	(44)
Foreign currency translation adjustments	0	2
Projected benefit obligation, End of year	724	786	712
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(52)	(53)
Other postretirement benefits	(672)	(733)
Net (liability)/asset recognized	(724)	(786)
United States | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	2,042	1,842
Service cost	0	13
Interest cost	39	54
Actuarial (gains)/losses - net	(72)	251
Benefits paid	(89)	(133)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	0
Foreign currency translation adjustments	0	0
Settlements and curtailments	0	13
Other	0	2
Projected benefit obligation, End of year	1,920	2,042	1,842
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,335	1,304
Actual return on plan assets	66	144
Company contributions	0	0
Benefits paid	(72)	(113)
Defined Benefit Plan, Plan Assets, Business Combination	0	0
Plan settlements	0	0
Foreign currency translation adjustments	0	0
Other	0	0
End balance	1,329	1,335	1,304
Funded Status	(591)	(707)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	0	0
Accounts payable and accrued liabilities	(23)	(23)
Accrued pensions	(568)	(684)
Net (liability)/asset recognized	(591)	(707)
United States | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	682	616
Service cost	11	9
Interest cost	12	17
Plan amendments	0	4
Actuarial (gains)/losses - net	(33)	75
Benefits paid	(41)	(39)
Foreign currency translation adjustments	0	0
Projected benefit obligation, End of year	631	682	616
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(47)	(48)
Other postretirement benefits	(584)	(634)
Net (liability)/asset recognized	(631)	(682)
International
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	10	17	13
International | Pension Plan
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	1,933	1,719
Service cost	9	11
Interest cost	26	33
Actuarial (gains)/losses - net	(91)	165
Benefits paid	(60)	(60)
Defined Benefit Plan, Benefit Obligation, Business Combination	48	0
Foreign currency translation adjustments	(51)	87
Settlements and curtailments	(198)	(19)
Other	(2)	(3)
Projected benefit obligation, End of year	1,614	1,933	1,719
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	1,881	1,661
Actual return on plan assets	42	198
Company contributions	10	17
Benefits paid	(51)	(51)
Defined Benefit Plan, Plan Assets, Business Combination	3	0
Plan settlements	(198)	(19)
Foreign currency translation adjustments	(38)	78
Other	(3)	(3)
End balance	1,646	1,881	1,661
Funded Status	32	(52)
Amounts recognized in the Consolidated Balance Sheet:
Other assets (long-term)	310	218
Accounts payable and accrued liabilities	(12)	(9)
Accrued pensions	(266)	(261)
Net (liability)/asset recognized	32	(52)
International | Other Postretirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, Beginning of year	104	96
Service cost	1	1
Interest cost	2	3
Plan amendments	0	0
Actuarial (gains)/losses - net	(10)	7
Benefits paid	(4)	(5)
Foreign currency translation adjustments	0	2
Projected benefit obligation, End of year	93	104	$ 96
Amounts recognized in the Consolidated Balance Sheet:
Accounts payable and accrued liabilities	(5)	(5)
Other postretirement benefits	(88)	(99)
Net (liability)/asset recognized	$ (93)	$ (104)

Employee Benefit Plans (Accumul

Employee Benefit Plans (Accumulated Other Comprehensive Loss Pretax Amounts Not Yet Reflected in Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated net actuarial losses	$ 857	$ 1,071
Accumulated prior service cost/(credit)	5	4
Total	862	1,075
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated net actuarial losses	170	233
Accumulated prior service cost/(credit)	(21)	(75)
Total	$ 149	$ 158

Employee Benefit Plans (Change

Employee Benefit Plans (Change in Accumulated Other Comprehensive Loss (Pretax) Relating to Defined Benefit Pension and Other Postretirement Benefits) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain arising during the year	$ (43)
New prior service cost	0
Amortization of actuarial loss	20	$ 15	$ 8
Amortization of prior service credit	54	59	57
Foreign currency translation adjustments	0
Impact of settlements	0
Net decrease	(9)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain arising during the year	(119)
New prior service cost	1
Amortization of actuarial loss	39	$ 71	$ 62
Amortization of prior service credit	0
Foreign currency translation adjustments	(3)
Impact of settlements	(53)
Net decrease	$ (213)

Employee Benefit Plans (Net Per

Employee Benefit Plans (Net Periodic Benefit Costs) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12	$ 10	$ 8
Interest cost	14	20	26
Amortization of prior service credit	(54)	(59)	(57)
Amortization of actuarial losses	20	15	8
Net periodic benefit cost/(income)	(8)	(14)	(15)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	24	23
Interest cost	65	87	105
Expected return on plan assets	152	144	139
Amortization of prior service credit	0
Amortization of actuarial losses	39	71	62
Settlements, curtailments, and special termination benefits	53	18	3
Net periodic benefit cost/(income)	$ 14	$ 56	$ 54

Employee Benefit Plans (Weighte

Employee Benefit Plans (Weighted Average Assumptions Used to Determine Benefit Obligation for Defined Benefit Pension and Other Postretirement Plans) (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to calculate benefit obligation	2.50%	2.10%
Rate of compensation increase	2.60%	1.50%
Return on plan assets assumption	4.80%	5.00%	5.40%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to calculate benefit obligation	2.80%	2.40%
Rate of compensation increase	2.50%	2.50%
Return on plan assets assumption	7.40%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate used to calculate benefit obligation	2.00%	1.60%
Rate of compensation increase	2.80%	1.10%

Employee Benefit Plans (Weigh_2

Employee Benefit Plans (Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost for Defined Benefit Pension and Other Postretirement Plans) (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate used to calculate benefit obligation	2.50%	2.10%
Discount rate	2.10%	2.80%	3.70%
Expected return on assets	4.80%	5.00%	5.40%
Rate of compensation increase	1.50%	2.60%	1.80%
United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate used to calculate benefit obligation	2.80%	2.40%
Expected return on assets	7.40%

Employee Benefit Plans (Weigh_3

Employee Benefit Plans (Weighted Average Target Pension Plan Asset Allocations) (Detail)	Dec. 31, 2021	Dec. 31, 2020
Minimum | Equity Securities
Asset Category
Weighted average target pension plan asset allocation, minimum	15.00%	15.00%
Minimum | Debt securities
Asset Category
Weighted average target pension plan asset allocation, minimum	30.00%	30.00%
Minimum | Real Estate
Asset Category
Weighted average target pension plan asset allocation, minimum	0.00%	0.00%
Minimum | Other
Asset Category
Weighted average target pension plan asset allocation, minimum	20.00%	20.00%
Maximum | Equity Securities
Asset Category
Weighted average target pension plan asset allocation, minimum	45.00%	45.00%
Maximum | Debt securities
Asset Category
Weighted average target pension plan asset allocation, minimum	65.00%	65.00%
Maximum | Real Estate
Asset Category
Weighted average target pension plan asset allocation, minimum	10.00%	10.00%
Maximum | Other
Asset Category
Weighted average target pension plan asset allocation, minimum	40.00%	40.00%

Employee Benefit Plans (Fair Va

Employee Benefit Plans (Fair Values of the Company's Pension Plan Assets by Asset Category) (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	$ 2,975	$ 3,216
Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	2,358	2,506
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	333	338
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	1,071	1,252
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	954	916	$ 835
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	617	710
Defined Benefit Plan, Equity Securities, US, Large Cap | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	157	159
Defined Benefit Plan, Equity Securities, US, Large Cap | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	79	65
Defined Benefit Plan, Equity Securities, US, Large Cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	78	94
Defined Benefit Plan, Equity Securities, US, Large Cap | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Defined Benefit Plan, Equity Securities, US, Small Cap | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	48	42
Defined Benefit Plan, Equity Securities, US, Small Cap | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	48	42
Defined Benefit Plan, Equity Securities, US, Small Cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Defined Benefit Plan, Equity Securities, US, Small Cap | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Defined Benefit Plan, Equity Securities, Non-US | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	206	224
Defined Benefit Plan, Equity Securities, Non-US | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	130	144
Defined Benefit Plan, Equity Securities, Non-US | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	76	80
Defined Benefit Plan, Equity Securities, Non-US | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Defined Benefit Plan, Cash and Cash Equivalents | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	50	15
Defined Benefit Plan, Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	8	5
Defined Benefit Plan, Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	42	10
Defined Benefit Plan, Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Debt Security, Corporate, US | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	332	464
Debt Security, Corporate, US | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Debt Security, Corporate, US | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	232	386
Debt Security, Corporate, US | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	100	78
Debt Security, Developed Markets And Emerging Economies | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	1	2
Debt Security, Developed Markets And Emerging Economies | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Debt Security, Developed Markets And Emerging Economies | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	1	2
Debt Security, Developed Markets And Emerging Economies | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Debt Security, Diverse Portfolio | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	57	126
Debt Security, Diverse Portfolio | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Debt Security, Diverse Portfolio | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	57	126
Debt Security, Diverse Portfolio | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
US Government Agencies Debt Securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	81	102
US Government Agencies Debt Securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	68	82
US Government Agencies Debt Securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	13	20
US Government Agencies Debt Securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Developed Markets, Government Agencies Debt Securities | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	10	19
Developed Markets, Government Agencies Debt Securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Developed Markets, Government Agencies Debt Securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	10	19
Developed Markets, Government Agencies Debt Securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Other | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	367	421
Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	367	421
Defined Benefit Plan, Real Estate, Hedge Funds, And Other [Member] | Fair Value, Inputs, Level 1, 2 and 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	1,049	932
Defined Benefit Plan, Real Estate, Hedge Funds, And Other [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	0	0
Defined Benefit Plan, Real Estate, Hedge Funds, And Other [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	562	515
Defined Benefit Plan, Real Estate, Hedge Funds, And Other [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair values of pension plan assets	$ 487	$ 417

Employee Benefit Plans (Chang_2

Employee Benefit Plans (Change in Fair Value of Company's Level 3 Pension Assets) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	$ 3,216
End balance	2,975	$ 3,216
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	916	835
Realized gains	1	30
Unrealized losses	30	(7)
Transfers in/(out), net	38	15
Foreign currency gains	(31)	43
End balance	954	916
Level 3 | Real Estate
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	124	123
Realized gains	3	4
Unrealized losses	22	(5)
Transfers in/(out), net	8	1
Foreign currency gains	0	1
End balance	157	124
Level 3 | Other Debt Securities
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	421	377
Realized gains	(11)	24
Unrealized losses	0	0
Transfers in/(out), net	(14)	(14)
Foreign currency gains	(29)	34
End balance	367	421
Level 3 | Hedge Funds and Other Assets
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	371	335
Realized gains	9	2
Unrealized losses	8	(2)
Transfers in/(out), net	44	28
Foreign currency gains	(2)	8
End balance	$ 430	$ 371

Employee Benefit Plans (Other P

Employee Benefit Plans (Other Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined contribution plan contribution rates as percentage of employee earnings	6.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Compensation expense related to the ESOP	$ 52	$ 50	$ 49
Deductible dividends on PPG shares held by the ESOP	10	11	11
Recognized expense for defined contribution pension plans	88	64	70
Expense (income) of the deferred compensation plan	20	25	21
Increase (Decrease) in fair value of investments	18	24	$ 20
Obligations under the deferred compensation plan	139	138
Investments in marketable securities by the deferred compensation plan	$ 104	$ 103

Commitments and Contingent Li_3

Commitments and Contingent Liabilities (Litigation Settlements - Asbestos Matters and Other Disclosure) (Detail)	Dec. 31, 2021
Pittsburgh Corning Corporation
Ownership interest	50.00%

Commitments and Contingent Li_4

Commitments and Contingent Liabilities (Additional Information - Environmental Matters) (Detail) $ in Millions	12 Months Ended				48 Months Ended
	Dec. 31, 2022USD ($)	Dec. 31, 2021USD ($)Location	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2024USD ($)	Jun. 30, 2011Location	Dec. 31, 2009Location
Environmental Matters [Abstract]
Reserves for environmental contingencies		$ 282	$ 300
Reserves for environmental contingencies classified as current liabilities		97	99
Pretax charges for environmental remediation costs		44	38	$ 77
Cash outlays related to environmental remediation		56	60	77
Historical low end of range of annual environmental remediation expense over the past 15 years		5
Historical high end of range of annual environmental remediation expense over the past 15 years		$ 35
Remediation Period		10 years
Scenario, Forecast | Maximum
Environmental Matters [Abstract]
Cash For Environmental Loss Contingencies High Estimate	$ 100				$ 75
Unreserved loss contingencies related to environmental matters, high estimate	200
Scenario, Forecast | Minimum
Environmental Matters [Abstract]
Cash For Environmental Loss Contingencies Low Estimate	80				$ 20
Unreserved loss contingencies related to environmental matters, high estimate	$ 100
Excavation of Soil
Environmental Matters [Abstract]
Percentage of the total remaining reserve		40.00%
Construction Services
Environmental Matters [Abstract]
Percentage of the total remaining reserve		20.00%
Jersey City Manufacturing Plant
Environmental Matters [Abstract]
Reserves for environmental contingencies		$ 89	102
Pretax charges for environmental remediation costs		25	15	43
Glass and Chemical Sites
Environmental Matters [Abstract]
Reserves for environmental contingencies		83	106
Pretax charges for environmental remediation costs		12	15	12
Other Environmental Contingencies
Environmental Matters [Abstract]
Reserves for environmental contingencies		110	92
Pretax charges for environmental remediation costs		$ 7	$ 8	$ 22
Judicial Consent Order
Environmental Matters [Abstract]
Number Of Sites Involved For Environmental Remediation | Location		6				20	19

Shareholders' Equity (Summary o

Shareholders' Equity (Summary of Shares Outstanding) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Shareholders' Equity Note [Line Items]
Common Stock, Par or Stated Value Per Share	$ 1.667
Preferred stock without par value (in dollars per share)	$ 10,000,000
Shares of common stock authorized	1,200,000,000
Per share cash dividends paid (in dollars per share)	$ 2.26	$ 2.10	$ 1.98
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	236,686,265	235,680,470	235,861,434
Purchases (in shares)	(1,521,765)		(2,722,800)
Issuances (in shares)	742,526	1,005,795	2,541,836
Ending balance (in shares)	235,907,026	236,686,265	235,680,470
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	581,146,136	581,146,136	581,146,136
Ending balance (in shares)	581,146,136	581,146,136	581,146,136
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	344,459,871	345,465,666	345,284,702
Purchases (in shares)	(1,521,765)		(2,722,800)
Issuances (in shares)	742,526	1,005,795	2,541,836
Ending balance (in shares)	345,239,110	344,459,871	345,465,666

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 5,815	$ 5,403	$ 4,732
Ending balance	6,411	5,815	5,403
Unrealized foreign currency translation adjustment, tax	55	(6)	19
Adjustment for pension and other postretirement benefits, tax	48	(70)	(57)
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,663)	(1,627)	(1,734)
Current year deferrals to AOCL	(325)	(36)	107
Reclassifications from AOCL to net income	0	0	0
Ending balance	(1,988)	(1,663)	(1,627)
Pension and Other Post retirement Benefit Adjustments, net of tax
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(937)	(724)	(568)
Current year deferrals to AOCL	132	(237)	(167)
Reclassifications from AOCL to net income	42	24	11
Ending balance	(763)	(937)	(724)
Unrealized Gain (Loss) on Derivatives, net of tax
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	1	1	2
Current year deferrals to AOCL	0	0	1
Reclassifications from AOCL to net income	0	0	(2)
Ending balance	1	1	1
Accumulated Other Comprehensive Loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,599)	(2,350)	(2,300)
Current year deferrals to AOCL	(193)	(273)	(59)
Reclassifications from AOCL to net income	42	24	9
Ending balance	$ (2,750)	$ (2,599)	$ (2,350)

Other Income (Detail)

Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Gain on sale of assets	$ 47	$ 5	$ 7
Royalty income	8	7	8
Share of net earnings of equity affiliates (See Note 6)	15	8	11
Income from legal settlements	22	0	0
Other	80	48	63
Total	172	68	89
Gain on sale of production facility	$ 34	$ 0	$ 0

Stock-Based Compensation (Addit

Stock-Based Compensation (Additional Information) (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Description and Terms	The options are generally exercisable 36 months after being granted and have a maximum term of 10 years.
Shares available for future grants under the PPG Omnibus Plan	5
Stock-based compensation expense	$ 57	$ 44	$ 39
Total income tax benefit recognized related to the stock-based compensation	$ 12	$ 10	$ 9
Maximum term of the outstanding stock options for the PPG Omnibus Plan and the PPG Stock Plan for certain employees	10 years
Weighted average fair value of options granted (in dollars per share)	$ 29.27	$ 21.93	$ 22.50
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	36 months
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost that have not yet vested	$ 8
Cost not yet recognized, period for recognition	1 year 6 months
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost that have not yet vested	$ 24
Award vesting period	3 years
Cost not yet recognized, period for recognition	1 year 6 months
Restricted Stock Units (RSUs) | Share-based Payment Arrangement, 2019-2021 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is assumed to vest for the purposes of expense recognition	150.00%
Restricted Stock Units (RSUs) | Share-based Payment Arrangement, 2020-2022 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is assumed to vest for the purposes of expense recognition	133.00%
Restricted Stock Units (RSUs) | Share-based Payment Arrangement, 2021-2023 Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is assumed to vest for the purposes of expense recognition	100.00%
Restricted Stock Units (RSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is paid based on performance	0.00%	0.00%	0.00%
Restricted Stock Units (RSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is paid based on performance	200.00%	200.00%	180.00%
Contingent Share Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost that have not yet vested	$ 7
Award vesting period	3 years
Earned payout if the target performance is achieved	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	92.80%
Cost not yet recognized, period for recognition	1 year 4 months 24 days
Contingent Share Grants | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is paid based on performance	0.00%	0.00%	0.00%
Contingent Share Grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of the target award that is paid based on performance	200.00%	200.00%	220.00%

Stock-Based Compensation (Weigh

Stock-Based Compensation (Weighted Average Assumptions Used in Calculating Fair Value of Stock Option) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Weighted average exercise price	$ 136.60	$ 119.52	$ 109.74
Risk free interest rate	1.00%	1.60%	2.60%
Expected life of option in years	6 years 6 months	6 years 6 months	6 years 6 months
Expected dividend yield	1.60%	1.50%	1.60%
Expected volatility	25.30%	20.00%	20.00%

Stock-Based Compensation (Stock

Stock-Based Compensation (Stock Options Outstanding, Exercisable and Activity) (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of Shares
Beginning Balance	3,371,282
Granted	527,464
Exercised	(510,864)
Forfeited/Expired	(47,480)
Ending Balance	3,340,402	3,371,282
Vested or expected to vest, at end of period	3,245,875
Exercisable, at end of period	1,687,933
Weighted Average Exercise Price
Beginning Balance (in dollars per share)	$ 104.18
Granted (in dollars per share)	136.60
Exercised (in dollars per share)	91.77
Forfeited/Expired (in dollars per share)	120.01
Ending Balance (in dollars per share)	110.98	$ 104.18
Vested or expected to vest, at end of period (in dollars per share)	110.45
Exercisable, at end of period (in dollars per share)	$ 100.46
Weighted Average Remaining Contractual Life (in years)
Outstanding	6 years 1 month 6 days	6 years 2 months 12 days
Vested or expected to vest, at end of period	6 years
Exercisable, at end of period	4 years 1 month 6 days
Intrinsic Value (in millions)
Outstanding	$ 205	$ 135
Vested or expected to vest, at end of period	201
Exercisable, at end of period	121
Employee Stock Option
Number of Shares
Total unrecognized compensation cost that have not yet vested	$ 8
Cost not yet recognized, period for recognition	1 year 6 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized, period for recognition	1 year 6 months

Stock-Based Compensation (Sto_2

Stock-Based Compensation (Stock Option Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Total intrinsic value of stock options exercised	$ 32	$ 31	$ 38
Cash received from stock option exercises	47	54	61
Income tax benefit from the exercise of stock options	8	7	9
Total fair value of stock options vested	$ 11	$ 11	$ 12

Stock-Based Compensation (RSU A

Stock-Based Compensation (RSU Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance	591,929
Granted	263,911
Released from restrictions	(215,208)
Forfeited	(18,577)
Ending Balance	622,055
Vested or expected vest, at end of period	592,068
Weighted Average Fair Value
Beginning Balance (in dollars per share)	$ 113.74
Granted (in dollars per share)	120.89
Released from restrictions (in dollars per share)	142.21
Forfeited (in dollars per share)	122.32
Ending Balance (in dollars per share)	125.92
Vested or expected to vest, at end of period (in dollars per share)	$ 125.60
Intrinsic Value (in millions)
Outstanding	$ 78	$ 67
Vested or expected to vest, at end of period	$ 73
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized, period for recognition	1 year 6 months

Revenue Recognition - Schedule

Revenue Recognition - Schedule Of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 16,802	$ 13,834	$ 15,146
United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	6,676	5,668	6,475
EMEA
Disaggregation of Revenue [Line Items]
Net sales	5,436	4,328	4,549
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	2,977	2,431	2,542
Latin America
Disaggregation of Revenue [Line Items]
Net sales	1,713	1,407	1,580
Performance Coatings Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	10,333	8,495	9,034
Performance Coatings Segment [Member] | United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	4,366	3,673	4,057
Performance Coatings Segment [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net sales	3,582	2,861	2,869
Performance Coatings Segment [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	1,254	1,015	1,095
Performance Coatings Segment [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net sales	1,131	946	1,013
Industrial Coatings Segment [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,469	5,339	6,112
Industrial Coatings Segment [Member] | United States and Canada
Disaggregation of Revenue [Line Items]
Net sales	2,310	1,995	2,418
Industrial Coatings Segment [Member] | EMEA
Disaggregation of Revenue [Line Items]
Net sales	1,854	1,467	1,680
Industrial Coatings Segment [Member] | Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	1,723	1,416	1,447
Industrial Coatings Segment [Member] | Latin America
Disaggregation of Revenue [Line Items]
Net sales	$ 582	$ 461	$ 567
Revenue from Contract with Customer | Service [Member] | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Service revenue, percentage of total revenue	5.00%	5.00%	5.00%

Revenue Recognition - Summary o

Revenue Recognition - Summary of Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 44	$ 22
Bad debt expense	19	14
Change in allowance for doubtful accounts related to COVID-19	(14)	30
Trade receivables written off as uncollectible, net of recoveries	(18)	(22)
Ending balance	$ 31	$ 44

Reportable Business Segment I_3

Reportable Business Segment Information (Reportable Segment Information) (Detail)	12 Months Ended
	Dec. 31, 2021Segment
Segment Reporting [Abstract]
Number of PPG operating segments	10
Number of PPG reportable business segments, based on economic similarities, the nature of their products, production processes, end-use markets and methods of distribution	2

Reportable Business Segment I_4

Reportable Business Segment Information (Reportable Segment Tables) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Net sales	$ 16,802	$ 13,834	$ 15,146
Total Segment income	2,171	2,109	2,271
Corporate unallocated	(194)	(233)	(198)
Interest Income (Expense), Net	(95)	(115)	(100)
Transaction-related costs	(86)	(9)	(17)
Pension Expense (Reversal of Expense), Noncash	(50)	0	0
Environmental remediation charges, net	(35)	(26)	(61)
Restructuring Costs	(27)	(224)	(222)
Impairment charges	(21)	(93)	0
Unusual or Infrequent Item, or Both, Loss, Gross	(17)	(17)	0
Accounts Receivable, Credit Loss Expense (Reversal), CARES Act	14	(30)	0
Income from legal settlements	22	0	0
Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve	133	0	(12)
Total Income before income taxes	1,815	1,362	1,661
Depreciation and amortization	561	509	511
Share of net earnings of equity affiliates	15	8	11
Segment assets	21,351	19,556	17,708
Investment in equity affiliates	126	120	129
Expenditures for property (including business acquisitions)	2,508	1,473	1,056
Corporate, Non-Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Depreciation and amortization	41	58	62
Share of net earnings of equity affiliates	10	5	10
Segment assets	2,149	2,965	2,160
Investment in equity affiliates	78	74	82
Expenditures for property (including business acquisitions)	26	14	63
Performance Coatings Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Net sales	10,333	8,495	9,034
Performance Coatings Segment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Net sales	10,333	8,495	9,034
Total Segment income	1,491	1,359	1,409
Depreciation and amortization	308	251	255
Share of net earnings of equity affiliates	5	3	1
Segment assets	13,395	11,551	10,636
Investment in equity affiliates	33	31	33
Expenditures for property (including business acquisitions)	1,698	1,293	483
Industrial Coatings Segment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Net sales	6,469	5,339	6,112
Industrial Coatings Segment | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Total Net sales	6,469	5,339	6,112
Total Segment income	680	750	862
Depreciation and amortization	212	200	194
Segment assets	5,807	5,040	4,912
Investment in equity affiliates	15	15	14
Expenditures for property (including business acquisitions)	$ 784	$ 166	$ 510

Reportable Business Segment I_5

Reportable Business Segment Information (Geographic Information) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 16,802	$ 13,834	$ 15,146
Segment income	2,171	2,109	2,271
Property, plant and equipment, net	3,442	3,127	2,983
United States and Canada
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	865	855	1,073
Property, plant and equipment, net	1,377	1,351	1,300
EMEA
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	612	572	569
Property, plant and equipment, net	1,069	857	836
Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	354	382	342
Property, plant and equipment, net	702	623	538
Latin America
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	340	300	287
Property, plant and equipment, net	$ 294	$ 296	$ 309

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	Schedule II – Valuation and Qualifying Accounts Allowance for Doubtful Accounts for the Years Ended December 31, 2021, 2020, and 2019 ($ in millions) Balance at Beginning of Year Charged to Costs and Expenses(1) Deductions(1, 2) Balance at End of Year 2021 $44 $5 ($18) $31 2020 $22 $44 ($22) $44 2019 $24 $24 ($26) $22 (1) In 2020, PPG recorded an allowance for doubtful accounts of $30 million related to the potential financial impacts of COVID-19. In 2021, PPG released $14 million of the previously established reserve due to improvement in economic conditions in certain countries and a slower pattern of bankruptcies than expected. (2) Notes and accounts receivable written off as uncollectible, net of recoveries, amounts attributable to divestitures and changes attributable to foreign currency translation.
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 167
Balance at End of Year	172	$ 167
Accounts Receivable, Credit Loss Expense (Reversal), CARES Act	(14)	30	$ 0
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	44	22	24
Charged to Costs and Expenses	5	44	24
Deductions	(18)	(22)	(26)
Balance at End of Year	$ 31	$ 44	$ 22