Pay vs Performance Disclosure

12 Months Ended

Dec. 31, 2022

USD ($)

Dec. 31, 2021

USD ($)

Dec. 31, 2020

USD ($)

Pay vs Performance Disclosure [Table]

Pay vs Performance [Table Text Block]

					AVERAGE			AVERAGE							SELECTED
					SUMMARY			COMP.	VALUE OF INITIAL FIXED $100						MEASURE:
					COMP. TABLE		ACTUALLY PAID		INVESTMENT BASED ON:						ADJUSTED
	SUMMARY		COMP.		TOTAL FOR		TO NON-PEO				PEER GROUP(3)				EARNINGS
	COMP. TABLE		ACTUALLY		NON-PEO NAMED		NAMED		TOTAL		TOTAL		NET		PER
	TOTAL FOR		PAID TO		EXECUTIVE		EXECUTIVE		SHAREHOLDER		SHAREHOLDER		INCOME		DILUTED
YEAR	PEO(1)		PEO(1)		OFFICERS(2)		OFFICERS(2)		RETURN		RETURN		(in millions)		SHARE
2022	$	8,867,377	$	238,659	$	2,280,483	$	(26,911)	$	99	$	101	$	1,028	$	6.22
2021	$	13,199,616	$	22,568,453	$	3,035,088	$	5,267,224	$	133	$	135	$	1,420	$	6.77
2020	$	15,903,993	$	16,689,353	$	3,607,399	$	3,526,539	$	110	$	112	$	1,056	$	6.12

(1) The principal executive officer was Mr. McGarry for each of the years shown.

(2) The non-principal executive officer named executive officers were Mr. Morales, Mr. Knavish, Ms. Liebert and Ms. Foulkes for each of the years shown. Mr. Vadlamannati was included as a non-principal executive officer named executive officer for 2022.

(3) The peer group consists of: 3M Co., Akzo Nobel N.V., Axalta Coatings Systems Ltd., Dow, Inc., Dupont de Nemours, Inc., Eastman Chemical Co., Masco Corp., RPM International Inc., and The Sherwin-Williams Co. See Exhibit 13.1 of our Form 10-K for the year ended December 31, 2022.

Company Selected Measure Name

Adjusted earnings per diluted share

Named Executive Officers, Footnote [Text Block]

(1) The principal executive officer was Mr. McGarry for each of the years shown.

(2) The non-principal executive officer named executive officers were Mr. Morales, Mr. Knavish, Ms. Liebert and Ms. Foulkes for each of the years shown. Mr. Vadlamannati was included as a non-principal executive officer named executive officer for 2022.

Peer Group Issuers, Footnote [Text Block]

(3) The peer group consists of: 3M Co., Akzo Nobel N.V., Axalta Coatings Systems Ltd., Dow, Inc., Dupont de Nemours, Inc., Eastman Chemical Co., Masco Corp., RPM International Inc., and The Sherwin-Williams Co. See Exhibit 13.1 of our Form 10-K for the year ended December 31, 2022.

PEO Total Compensation Amount

$ 8,867,377

$ 13,199,616

$ 15,903,993

PEO Actually Paid Compensation Amount

$ 238,659

22,568,453

16,689,353

Adjustment To PEO Compensation, Footnote [Text Block]

A reconciliation of PEO SCT total compensation to CAP is provided in the following table.

PEO SCT Total Compensation to CAP Reconciliation (2020-2022)

											PLUS CHANGE
											FROM BOY TO		PLUS CHANGE
									PLUS EOY		EOY IN FAIR		IN FAIR VALUE
									FAIR VALUE		VALUE OF		FROM BOY TO
									OF EQUITY		AWARDS		VESTING DATE
									AWARDS		GRANTED IN		OF AWARDS
									GRANTED		ANY PRIOR		GRANTED IN
					PLUS				DURING YEAR		YEAR		ANY PRIOR
			MINUS SCT		PENSION				THAT ARE		THAT ARE		YEAR THAT
	SCT		CHANGE IN		VALUE				OUTSTANDING		OUTSTANDING		VESTED
	TOTAL FOR		PENSION		SERVICE		MINUS SCT		AND UNVESTED		AND UNVESTED		DURING		PEO
YEAR	PEO		VALUE		COST		EQUITY		AT EOY		AT EOY		THE YEAR		CAP
2022	$	8,867,377	$	4,368,862	$	—	$	(10,000,026)	$	7,834,096	$	(4,197,554)	$	(6,634,096)	$	238,659
2021	$	13,199,616	$	218,598	$	—	$	(9,400,002)	$	10,917,328	$	4,275,913	$	3,357,000	$	22,568,453
2020	$	15,903,993	$	(4,289,632)	$	180,279	$	(8,249,709)	$	11,073,569	$	1,559,781	$	511,072	$	16,689,353
"EOY" = end of Year; "BOY" = Beginning of Year

Non-PEO NEO Average Total Compensation Amount

$ 2,280,483

3,035,088

3,607,399

Non-PEO NEO Average Compensation Actually Paid Amount

$ (26,911)

5,267,224

3,526,539

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

A reconciliation of average non-PEO SCT total compensation to CAP is provided in the following table.

Average Non-PEO NEOs SCT Total Compensation to CAP Reconciliation (2020-2022)

											PLUS CHANGE
											FROM BOY TO		PLUS CHANGE		MINUS FAIR
									PLUS EOY		EOY IN FAIR		IN FAIR VALUE		VALUE AT
									FAIR VALUE		VALUE OF		FROM BOY TO		BOY OF
									OF EQUITY		AWARDS		VESTING DATE		AWARDS
									AWARDS		GRANTED IN		OF AWARDS		GRANTED
									GRANTED		ANY PRIOR		GRANTED IN		IN PRIOR
					PLUS				DURING YEAR		YEAR		ANY PRIOR		YEAR THAT
	SCT		MINUS SCT		PENSION				THAT ARE		THAT ARE		YEAR THAT		WERE
	TOTAL FOR		CHANGE IN		VALUE				OUTSTANDING		OUTSTANDING		VESTED		FORFEITED		NON-PEO
	NON-PEO		PENSION		SERVICE		MINUS SCT		AND UNVESTED		AND UNVESTED		DURING		DURING		NEOs
YEAR	NEOs		VALUE		COST		EQUITY		AT EOY		AT EOY		THE YEAR		THE YEAR		CAP
2022	$	2,280,483	$	846,793	$	—	$	(1,970,003)	$	1,253,448	$	(546,994)	$	(815,908)	$	(1,074,730)	$	(26,911)
2021	$	3,035,088	$	105,473	$	—	$	(1,724,948)	$	2,003,403	$	1,388,365	$	459,843	$	—	$	5,267,224
2020	$	3,607,399	$	(995,665)	$	117,478	$	(1,399,950)	$	1,879,152	$	201,719	$	116,406	$	—	$	3,526,539
"EOY" = end of Year; "BOY" = Beginning of Year

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

As shown in the chart below, the PEO’s and the Non-PEO NEOs’ CAP amounts are aligned with the Company’s TSR. This is primarily due to the Company’s use of equity incentives, which are tied directly to stock price in addition to the Company’s financial performance.

Compensation Actually Paid vs. Net Income [Text Block]

As shown in the chart below, the Company’s CAP is aligned with the Company's net income. The Company does not use net income to determine compensation levels or incentive plan payouts.

Compensation Actually Paid vs. Company Selected Measure [Text Block]

The chart below which compares the PEO’s and the other non-PEO NEOs’ CAP to PPG’s company-selected measure, adjusted earnings per diluted share, indicates that there is a very strong relationship between adjusted earnings per diluted share and CAP. This is primarily due to the Company's use of equity incentives, which are tied directly to stock price and earnings growth in addition to the Company's financial performance.

Total Shareholder Return Vs Peer Group [Text Block]

As shown in the chart below, the Company’s TSR performance for the immediately preceding three years was aligned with the companies included in the peer group, and when the six-year TSR is compared to peers, the Company has outperformed the peers.

The peer group consists of: 3M Co., Akzo Nobel N.V., Axalta Coatings Systems Ltd., Dow, Inc., Dupont de Nemours, Inc., Eastman Chemical Co., Masco Corp., RPM International Inc., and The Sherwin-Williams Co.

Tabular List [Table Text Block]

The three items listed below represent the most important financial performance measures used by PPG to link compensation actually paid to our named executive officers for 2022 to the Company’s performance:

MOST IMPORTANT PERFORMANCE MEASURES

Adjusted earnings per diluted share

Cash flow return on capital

Total shareholder return

Total Shareholder Return Amount

$ 99

133

110

Peer Group Total Shareholder Return Amount

101

135

112

Net Income (Loss)

$ 1,028,000,000

$ 1,420,000,000

$ 1,056,000,000

Company Selected Measure Amount

6.22

6.77

6.12

PEO Name

Mr. McGarry

Additional 402(v) Disclosure [Text Block]

Please see “Annual Compensation” and “Long-Term Incentive Compensation” on pages 48 through 56 for a description of how these metrics are used in our executive compensation program.

Measure [Axis]: 1

Pay vs Performance Disclosure [Table]

Measure Name

Adjusted earnings per diluted share

Measure [Axis]: 2

Pay vs Performance Disclosure [Table]

Measure Name

Cash flow return on capital

Measure [Axis]: 3

Pay vs Performance Disclosure [Table]

Measure Name

Total shareholder return

PEO [Member] | MINUS SCT CHANGE IN PENSION VALUE

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ 4,368,862

$ 218,598

$ (4,289,632)

PEO [Member] | PLUS PENSION VALUE SERVICE COST

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

180,279

PEO [Member] | MINUS SCT EQUITY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(10,000,026)

(9,400,002)

(8,249,709)

PEO [Member] | PLUS EOY FAIR VALUE OF EQUITY AWARDS GRANTED DURING YEAR THAT ARE OUTSTANDING AND UNVESTED AT EOY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

7,834,096

10,917,328

11,073,569

PEO [Member] | PLUS CHANGE FROM BOY TO EOY IN FAIR VALUE OF AWARDS GRANTED IN ANY PRIOR YEAR THAT ARE OUTSTANDING AND UNVESTED AT EOY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(4,197,554)

4,275,913

1,559,781

PEO [Member] | PLUS CHANGE IN FAIR VALUE FROM BOY TO VESTING DATE OF AWARDS GRANTED IN ANY PRIOR YEAR THAT VESTED DURING THE YEAR

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(6,634,096)

3,357,000

511,072

Non-PEO NEO [Member] | MINUS SCT CHANGE IN PENSION VALUE

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

846,793

105,473

(995,665)

Non-PEO NEO [Member] | PLUS PENSION VALUE SERVICE COST

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

117,478

Non-PEO NEO [Member] | MINUS SCT EQUITY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(1,970,003)

(1,724,948)

(1,399,950)

Non-PEO NEO [Member] | PLUS EOY FAIR VALUE OF EQUITY AWARDS GRANTED DURING YEAR THAT ARE OUTSTANDING AND UNVESTED AT EOY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

1,253,448

2,003,403

1,879,152

Non-PEO NEO [Member] | PLUS CHANGE FROM BOY TO EOY IN FAIR VALUE OF AWARDS GRANTED IN ANY PRIOR YEAR THAT ARE OUTSTANDING AND UNVESTED AT EOY

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(546,994)

1,388,365

201,719

Non-PEO NEO [Member] | PLUS CHANGE IN FAIR VALUE FROM BOY TO VESTING DATE OF AWARDS GRANTED IN ANY PRIOR YEAR THAT VESTED DURING THE YEAR

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

(815,908)

$ 459,843

$ 116,406

Non-PEO NEO [Member] | MINUS FAIR VALUE AT BOY OF AWARDS GRANTED IN PRIOR YEAR THAT WERE FORFEITED DURING THE YEAR

Pay vs Performance Disclosure [Table]

Adjustment to Compensation Amount

$ (1,074,730)