Other (Income)/Charges, Net (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Nov. 25, 2024	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Site Contingency [Line Items]
Environmental charges			$ 30	$ 35	$ 13
Pension and other postretirement benefit plans, non-service cost components			43	39	(10)
Share of net earnings of equity affiliates (See Note 5)			(20)	(21)	(25)
Gain on sale of assets			(129)	23	(4)
Foreign Currency Transaction Gain (Loss), before Tax			110	0	0
Insurance recoveries			(4)	(16)	0
Royalty income			(10)	(10)	(8)
Other expense, net				30
Other income, net			(28)		(32)
Total Other (income)/charges, net			(8)	80	$ (66)
Gain on sale of production facility				22
Incurred cost			239	$ 33
Accumulated Currency Losses | 2024 Cost Reduction Program
Site Contingency [Line Items]
Incurred cost		$ 110
Discontinued Operations, Disposed of by Sale | Silicas Products Business
Site Contingency [Line Items]
Gain (loss) on disposal of discontinued operation, net of tax	$ 129	$ 129
Legacy PPG Manufacturing Sites
Site Contingency [Line Items]
Environmental charges			$ 24