Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 15,845	$ 16,242	$ 15,614
Cost of sales, exclusive of depreciation and amortization	9,252	9,678	9,975
Selling, general and administrative	3,391	3,401	3,037
Depreciation	360	360	357
Amortization	132	154	145
Research and development, net	423	424	434
Interest expense	241	247	167
Interest income	(177)	(140)	(54)
Business restructuring, net	233	(2)	33
Impairment and other-related charges, net	146	160	231
Pension settlement charge	0	190	0
Other (income)/charges, net	(8)	80	(66)
Income before income taxes	1,852	1,690	1,355
Income tax expense	475	428	320
Income from continuing operations	1,377	1,262	1,035
(Loss)/income from discontinued operations, net of tax	(228)	47	19
Net income attributable to the controlling and noncontrolling interests	1,149	1,309	1,054
Less: Net income attributable to noncontrolling interests	33	39	28
Net income (attributable to PPG)	1,116	1,270	1,026
Income from continuing operations, net of tax	1,344	1,223	1,007
(Loss)/income from discontinued operations, net of tax	$ (228)	$ 47	$ 19
Earnings per common share
Continuing operations (in dollars per share)	$ 5.75	$ 5.18	$ 4.26
Discontinued operations (in dollars per share)	(0.98)	0.20	0.08
Net Income (attributable to PPG) (in dollars per share)	4.77	5.38	4.34
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	5.72	5.16	4.24
Discontinued operations (in dollars per share)	(0.97)	0.19	0.08
Net Income (attributable to PPG) (in dollars per share)	$ 4.75	$ 5.35	$ 4.32