Subsequent Event (Tables)

3 Months Ended

Mar. 31, 2015

Subsequent Events [Abstract]

Pro forma per share information

Pro forma earnings per share is as follows, giving retroactive effect to the stock split:

	For the three months ended March 31,
	2015		2014		2015		2014
($ in millions, except per share amounts)	Basic				Diluted
Amounts attributable to PPG:
Income from continuing operations, net of tax	$	321	$	277	$	321	$	277
Income from discontinued operations, net of tax	1		985		1		985
Net income (attributable to PPG)	$	322	$	1,262	$	322	$	1,262
Weighted-average shares outstanding, as reported	136.6		139.1		137.8		140.7
Weighted-average shares outstanding, pro forma	273.2		278.2		275.6		281.4
Earnings per common share - as reported:
Income from continuing operations, net of tax	$	2.35	$	1.99	$	2.33	$	1.97
Income from discontinued operations, net of tax	0.01		7.08		0.01		7.00
Net income (attributable to PPG)	$	2.36	$	9.07	$	2.34	$	8.97
Earnings per common share – pro forma:
Income from continuing operations, net of tax	$	1.17	$	1.00	$	1.16	$	0.98
Income from discontinued operations, net of tax	0.01		3.54		0.01		3.50
Net income (attributable to PPG)	$	1.18	$	4.54	$	1.17	$	4.48
Dividends per common share:
As reported	$	0.67	$	0.61
Pro forma	$	0.33	$	0.31