Description of the Plan (Details) - EBP 384	12 Months Ended
Dec. 31, 2025 USD ($) loan	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Participant contribution, automatic, deferral rate	4.00%
Participant contribution, maximum contribution to eligible compensation, percentage	50.00%
Rollovers	$ 10,000,000	$ 21,000,000
Employer contribution, participant compensation matched, percent	6.00%
Employer contribution, matching percentage	100.00%	100.00%
Employer additional contribution, change in net asset available for benefit, increase from employer contribution, cash	$ 34,000,000	$ 44,000,000
Dividend election, maximum reinvestment percentage	1
Dividend election, maximum cash distribution percentage	1
Employer contribution vesting service period	3 years
Forfeited nonvested account	$ 1,000,000	$ 1,000,000
Involuntary cash-out limit	5,000
Vested account balance, minimum for loan	$ 2,000
Note receivable from participant, outstanding loans, maximum \| loan	2
Note receivable from participant, loan default lookback period	36 months
Note receivable from participant, loan payoff waiting period	30 days
Note receivable from participant, account, minimum borrowing, amount	$ 1,000
Note receivable from participant, account, maximum borrowing, amount	$ 50,000
Note receivable from participant, account, maximum borrowing, to total account, percentage	50.00%
Note receivable from participant, account, highest outstanding balance, lookback period	12 months
Minimum
EBP, Description of Plan [Line Items]
Employer contribution, annual employer additional contribution, percentage	0.02
Note receivable from participant, general loan, borrowing term	12 days
Note receivable from participant, account, primary residence, borrowing term	61 months
Maximum
EBP, Description of Plan [Line Items]
Employer contribution, annual employer additional contribution, percentage	0.05
Note receivable from participant, general loan, borrowing term	60 months
Note receivable from participant, account, primary residence, borrowing term	360 months

EBP, Change In Net Asset Available For Benefit, Increase From Additional Employer Contribution, Cash

No definition available.

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Period Type:	duration

- Definition

EBP, Dividend Election, Maximum Cash Distribution Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Dividend Election, Maximum Reinvestment Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Contribution, Annual Employer Additional Contribution, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Contribution Vesting Service Period

+ References

No definition available.

+ Details

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- Definition

EBP, Involuntary Cash-out Limit

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Account, General Loan, Borrowing Term

+ References

No definition available.

+ Details

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- Definition

EBP, Note Receivable from Participant, Account, Highest Outstanding Balance, Lookback Period

+ References

No definition available.

+ Details

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- Definition

EBP, Note Receivable from Participant, Account, Loan Default, Lookback Period

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

EBP, Note Receivable from Participant, Account, Loan Payoff Waiting Period

+ References

No definition available.

+ Details

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Namespace Prefix:	ppg_
Data Type:	xbrli:durationItemType
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Period Type:	duration

- Definition

EBP, Note Receivable from Participant, Account, Outstanding Loans, Maximum

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

EBP, Note Receivable From Participant, Account, Primary Residence, Borrowing Term

+ References

No definition available.

+ Details

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- Definition

EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage

+ References

No definition available.

+ Details

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- Definition

EBP, Vested Account Balance, Minimum For Loan

+ References

No definition available.

+ Details

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Namespace Prefix:	ppg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase in net asset available for benefit from contribution transferred from another qualified plan or from individual retirement account of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Excludes contribution for participant transmitted by employer of participant in EBP.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(4)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(4)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 4: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 5: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 50
-Paragraph 2B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477783/962-325-50-2B

Reference 6: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-7

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Data Type:	dtr-types:percentItemType
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Period Type:	duration

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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- Details

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