Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income attributable to the controlling and noncontrolling interests	$ 339	$ 354
Other comprehensive income, net of tax:
Defined benefit pension and other postretirement benefits, net	21	19
Unrealized foreign currency translation adjustments	279	45
Derivative financial instruments, net	(13)	(8)
Other comprehensive income, net of tax	287	56
Total comprehensive income	626	410
Less: amounts attributable to noncontrolling interests:
Net income	(5)	(7)
Unrealized foreign currency translation adjustments	(7)	3
Comprehensive income attributable to PPG	$ 614	$ 406