Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Equity [Abstract]

Change in Total Shareholders' Equity

The following tables present the change in total shareholders’ equity for the three months ended March 31, 2013 and 2012, respectively:

(Millions)	Total PPG Shareholders’ Equity			Non- controlling Interests			Total
Balance, January 1, 2013	$	4,063		$	259		$	4,322
Net income	2,410			35			2,445
Other comprehensive income, net of tax	58			(3		)	55
Cash dividends	(84		)	—			(84		)
Issuance of treasury stock	44			—			44
Purchase of treasury stock	(140		)	—			(140		)
Stock-based compensation activity	(2		)	—			(2		)
Increase in treasury stock (Note 5)	(1,562		)	—			(1,562		)
Reduction in non-controlling interests (Note 5)	—			(19		)	(19		)
Dividends paid on subsidiary common stock to noncontrolling interests	—			(18		)	(18		)
Balance, March 31, 2013	$	4,787		$	254		$	5,041

(Millions)	Total PPG Shareholders’ Equity			Non- controlling Interests			Total
Balance, January 1, 2012	$	3,249		$	197		$	3,446
Net income	13			38			51
Other comprehensive income, net of tax	147			4			151
Cash dividends	(87		)	—			(87		)
Issuance of treasury stock	58			—			58
Purchase of treasury stock	(92		)	—			(92		)
Stock-based compensation activity	5			—			5
Dividends paid on subsidiary common stock to noncontrolling interests	—			(15		)	(15		)
Other changes in noncontrolling interests	—			(1		)	(1		)
Balance, March 31, 2012	$	3,293		$	223		$	3,516