Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Net sales	$ 15,875	$ 15,845	$ 16,242
Cost of sales, exclusive of depreciation and amortization	9,316	9,252	9,678
Selling, general and administrative	3,439	3,391	3,401
Depreciation	403	360	360
Amortization	125	132	154
Research and development, net	423	423	424
Interest expense	241	241	247
Interest income	(153)	(177)	(140)
Business restructuring, net	6	233	(2)
Impairment and other-related charges, net	24	146	160
Pension settlement charge	0	0	190
Other charges/(income), net	6	(8)	80
Income before income taxes	2,045	1,852	1,690
Income tax expense	458	475	428
Income from continuing operations	1,587	1,377	1,262
Income/(loss) from discontinued operations, net of tax	5	(228)	47
Net income attributable to the controlling and noncontrolling interests	1,592	1,149	1,309
Less: Net income attributable to noncontrolling interests	16	33	39
Net income (attributable to PPG)	1,576	1,116	1,270
Income from continuing operations, net of tax	1,571	1,344	1,223
Income/(loss) from discontinued operations, net of tax	$ 5	$ (228)	$ 47
Earnings per common share
Continuing operations (in dollars per share)	$ 6.94	$ 5.75	$ 5.18
Discontinued operations (in dollars per share)	0.02	(0.98)	0.20
Net Income (attributable to PPG) (in dollars per share)	6.96	4.77	5.38
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	6.92	5.72	5.16
Discontinued operations (in dollars per share)	0.02	(0.97)	0.19
Net Income (attributable to PPG) (in dollars per share)	$ 6.94	$ 4.75	$ 5.35