Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Change in Total Shareholders' Equity

Changes to shareholders’ equity for the nine months ended September 30, 2017 and 2016 were as follows:

($ in millions)	Total PPG Shareholders’ Equity			Non-controlling Interests			Total
January 1, 2017	$	4,826		$	87		$	4,913
Net income	1,444			16			1,460
Other comprehensive income, net of tax	293			15			308
Cash dividends	(321		)	—			(321		)
Issuance of treasury stock	75			—			75
Stock repurchase program	(413		)	—			(413		)
Stock-based compensation activity	(2		)	—			(2		)
Dividends paid on subsidiary common stock to noncontrolling interests	—			(5		)	(5		)
Other	—			(5		)	(5		)
September 30, 2017	$	5,902		$	108		$	6,010

($ in millions)	Total PPG Shareholders’ Equity			Non-controlling Interests			Total
January 1, 2016	$	4,983		$	86		$	5,069
Net income	533			18			551
Other comprehensive income, net of tax	161			(1		)	160
Cash dividends	(309		)	—			(309		)
Issuance of treasury stock	51			—			51
Stock repurchase program	(400		)	—			(400		)
Stock-based compensation activity	12			—			12
Dividends paid on subsidiary common stock to noncontrolling interests	—			(4		)	(4		)
Other	—			(9		)	(9		)
September 30, 2016	$	5,031		$	90		$	5,121