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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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Estimate of reasonably possible loss exposure in excess of amount accrued for remediation, site restoration, postclosure, monitoring commitments, or other exit costs associated with the sale, disposal or abandonment of a particular property resulting from unanticipated contamination of the assets.

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Cash outflows made during the period for environmental remediation activities.

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Commitments and Contingent Liabilities - Environmental Matters (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Commitments and Contingencies Disclosure [Line Items]
Reserves for environmental contingencies	$ 231			$ 231		$ 227
Reserves for environmental contingencies classified as current liabilities	45			45		52
Environmental remediation charge	(1)		$ 3	23	$ 16
Payments for Environmental Liabilities	6		$ 12	19	$ 28
Minimum
Commitments and Contingencies Disclosure [Line Items]
Unreserved loss contingencies related to environmental matters				100
Maximum
Commitments and Contingencies Disclosure [Line Items]
Unreserved loss contingencies related to environmental matters				200
New Jersey Chrome
Commitments and Contingencies Disclosure [Line Items]
Reserves for environmental contingencies	60			60		53
Glass and chemical
Commitments and Contingencies Disclosure [Line Items]
Reserves for environmental contingencies	55			55		54
Other
Commitments and Contingencies Disclosure [Line Items]
Reserves for environmental contingencies	$ 116			$ 116		$ 120
Excavation of Soil
Commitments and Contingencies Disclosure [Line Items]
Percentage of the total remaining reserve	60.00%			60.00%
Groundwater Remediation
Commitments and Contingencies Disclosure [Line Items]
Percentage of the total remaining reserve	25.00%			25.00%
Legacy PPG Manufacturing Sites
Commitments and Contingencies Disclosure [Line Items]
Environmental remediation charge		$ 20