Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 18,246	$ 17,652	$ 16,802
Cost of sales, exclusive of depreciation and amortization	10,745	11,096	10,286
Selling, general and administrative	4,222	3,842	3,780
Depreciation	391	388	389
Amortization	167	166	172
Research and development, net	433	448	439
Interest expense	247	167	121
Interest income	(140)	(54)	(26)
Impairment and other-related charges, net	160	245	21
Pension settlement charge	190	0	50
Asbestos-related claims reserve adjustment	0	0	(133)
Other charges/(income), net	83	(27)	(112)
Income before income taxes	1,748	1,381	1,815
Income tax expense	439	325	374
Income from continuing operations	1,309	1,056	1,441
(Loss)/income from discontinued operations, net of tax	0	(2)	19
Net income attributable to the controlling and noncontrolling interests	1,309	1,054	1,460
Less: Net income attributable to noncontrolling interests	39	28	21
Net income (attributable to PPG)	1,270	1,026	1,439
Income from continuing operations, net of tax	1,270	1,028	1,420
(Loss)/income from discontinued operations, net of tax	$ 0	$ (2)	$ 19
Earnings per common share
Continuing operations (in dollars per share)	$ 5.38	$ 4.35	$ 5.98
Discontinued operations (in dollars per share)	0	(0.01)	0.08
Net Income (attributable to PPG) (in dollars per share)	5.38	4.34	6.06
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	5.35	4.33	5.93
Discontinued operations (in dollars per share)	0	(0.01)	0.08
Net Income (attributable to PPG) (in dollars per share)	$ 5.35	$ 4.32	$ 6.01