Consolidated Statement of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income/(Loss)	Total PPG	Non-controlling Interests
Beginning balance at Dec. 31, 2013	$ 5,198	$ 484	$ 953	$ 12,757	$ (8,002)	$ (1,260)	$ 4,932	$ 266
Net income attributable to the controlling and noncontrolling interests	2,159			2,102			2,102	57
Other comprehensive loss, net of tax	(862)					(856)	(856)	(6)
Cash dividends	(361)			(361)			(361)
Purchase of treasury stock	(750)				(750)		(750)
Issuance of treasury stock	77		39		38		77
Stock-based compensation activity	64		64				64
Dividends paid on subsidiary common stock to noncontrolling interests	(50)							(50)
Reductions in noncontrolling interests	(210)		28				(28)	(182)
Ending balance at Dec. 31, 2014	5,265	484	1,028	14,498	(8,714)	(2,116)	5,180	85
Net income attributable to the controlling and noncontrolling interests	1,427			1,406			1,406	21
Other comprehensive loss, net of tax	(599)					(586)	(586)	(13)
Cash dividends	(383)			(383)			(383)
Adjustments to Additional Paid in Capital, Stock Split	0	485	(485)	0	0	0	0	0
Purchase of treasury stock	(751)				(751)		(751)
Issuance of treasury stock	71		46		25		71
Stock-based compensation activity	46		46				46
Dividends paid on subsidiary common stock to noncontrolling interests	(4)							(4)
Reductions in noncontrolling interests	(3)		0				0	(3)
Ending balance at Dec. 31, 2015	5,069	969	635	15,521	(9,440)	(2,702)	4,983	86
Net income attributable to the controlling and noncontrolling interests	899			877			877	22
Other comprehensive loss, net of tax	336					346	346	(10)
Cash dividends	(414)			(414)			(414)
Purchase of treasury stock	(1,050)				(1,050)		(1,050)
Issuance of treasury stock	55		37		18		55
Stock-based compensation activity	29		29				29
Dividends paid on subsidiary common stock to noncontrolling interests	(4)							(4)
Reductions in noncontrolling interests	(7)		0				0	(7)
Ending balance at Dec. 31, 2016	$ 4,913	$ 969	$ 701	$ 15,984	$ (10,472)	$ (2,356)	$ 4,826	$ 87