Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales	$ 17,652	$ 16,802	$ 13,834
Cost of sales, exclusive of depreciation and amortization	11,096	10,286	7,777
Selling, general and administrative	3,842	3,780	3,389
Depreciation	388	389	371
Amortization	166	172	138
Research and development, net	448	439	379
Interest expense	167	121	138
Interest income	(54)	(26)	(23)
Impairment and other related charges, net	245	21	93
Pension settlement charge	0	50	0
Asbestos-related claims reserve adjustment	0	(133)	0
Business restructuring, net	33	31	174
Other (income)/charges, net	(60)	(143)	36
Income before income taxes	1,381	1,815	1,362
Income tax expense	325	374	291
Income from continuing operations	1,056	1,441	1,071
(Loss)/income from discontinued operations, net of tax	(2)	19	3
Net income attributable to the controlling and noncontrolling interests	1,054	1,460	1,074
Less: Net income attributable to noncontrolling interests	28	21	15
Net income (attributable to PPG)	1,026	1,439	1,059
Income from continuing operations, net of tax	1,028	1,420	1,056
(Loss)/income from discontinued operations, net of tax	$ (2)	$ 19	$ 3
Earnings per common share
Continuing operations (in dollars per share)	$ 4.35	$ 5.98	$ 4.46
Discontinued operations (in dollars per share)	(0.01)	0.08	0.01
Net Income (attributable to PPG) (in dollars per share)	4.34	6.06	4.47
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	4.33	5.93	4.44
Discontinued operations (in dollars per share)	(0.01)	0.08	0.01
Net Income (attributable to PPG) (in dollars per share)	$ 4.32	$ 6.01	$ 4.45