Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Change in Total Shareholders' Equity

Changes to shareholders’ equity for the nine months ended September 30, 2018 and 2017 were as follows:

($ in millions)	Total PPG Shareholders’ Equity			Non-controlling Interests			Total
January 1, 2018		$5,557			$115			$5,672
Net income	1,083			14			1,097
Other comprehensive loss, net of tax	(140		)	(11		)	(151		)
Reclassifications from other comprehensive income to retained earnings - Adoption ASU 2018-02 (a)	107			—			107
Cash dividends	(338		)	(4		)	(342		)
Issuance of treasury stock	38			—			38
Stock repurchase program	(1,313		)	—			(1,313		)
Stock-based compensation activity	(10		)	—			(10		)
Other	(4		)	(16		)	(20		)
September 30, 2018		$4,980			$98			$5,078

($ in millions)	Total PPG Shareholders’ Equity			Non-controlling Interests			Total
January 1, 2017		$4,828			$87			$4,915
Net income (As Restated)	1,443			16			1,459
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 (As Restated)	(8		)	—			(8		)
Dividends paid on subsidiary common stock to noncontrolling interests	—			(5		)	(5		)
Other	—			(5		)	(5		)
September 30, 2017 (As Restated)		$5,897			$108			$6,005

(a) See Note 3, "New Accounting Standards" for more information.