Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Common Share Calculations

The following table presents the earnings per common share calculations for the three months ended March 31, 2013 and 2012.

	Three Months Ended March 31
(Millions, except per share amounts)	2013		2012
Earnings per common share (attributable to PPG)
Income from continuing operations, net of tax	$	219	$	(50	)
Income from discontinued operations, net of tax	2,191		63
Net income (attributable to PPG)	$	2,410	$	13
Weighted average common shares outstanding	146.1		152.8
Earnings per common share (attributable to PPG):
Income from continuing operations, net of tax	$	1.50	$	(0.33	)
Income from discontinued operations, net of tax	14.99		0.41
Net income (attributable to PPG)	$	16.49	$	0.08
Earnings per common share - assuming dilution (attributable to PPG)
Income from continuing operations, net of tax	$	219	$	(50	)
Income from discontinued operations, net of tax	2,191		63
Net income (attributable to PPG)	$	2,410	$	13
Weighted average common shares outstanding	146.1		152.8
Effect of dilutive securities:
Stock options	0.9		0.9
Other stock compensation plans	0.7		0.8
Potentially dilutive common shares	1.6		1.7
Adjusted weighted average common shares outstanding	147.7		154.5
Earnings per common share - assuming dilution (attributable to PPG):
Income from continuing operations, net of tax	$	1.48	$	(0.32	)
Income from discontinued operations, net of tax	14.83		0.40
Net income (attributable to PPG)	$	16.31	$	0.08