Other (Income)/Charges, Net (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Site Contingency [Line Items]
Environmental charges	$ 30	$ 46	$ 13	$ 44
Pension and other postretirement benefit plans, non-service cost components		39	(10)	(15)
Share of net earnings of equity affiliates (See Note 5)		(21)	(25)	(15)
Gain on sale of assets		23	(4)	(44)
Foreign Currency Transaction Gain (Loss), before Tax		20	0	0
Royalty income		(10)	(8)	(8)
Business restructuring (income)/charges, net		(2)	33	31
Income from legal settlements		0	0	(22)
Other income, net		(12)	(26)	(83)
Total other charges/(income), net		83	(27)	(112)
Gain on sale of production facility			$ 22	$ 34
Legacy PPG Manufacturing Sites
Site Contingency [Line Items]
Environmental charges		$ 30