Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income attributable to the controlling and noncontrolling interests	$ 1,054	$ 1,460	$ 1,074
Defined benefit pension and other postretirement benefit adjustments	206	174	(213)
Unrealized foreign currency translation adjustments	(279)	(330)	(36)
Other comprehensive loss, net of tax	(73)	(156)	(249)
Total comprehensive income	981	1,304	825
Less: amounts attributable to noncontrolling interests:
Net income	(28)	(21)	(15)
Unrealized foreign currency translation adjustments	13	5
Comprehensive income attributable to PPG	$ 966	$ 1,288	$ 810