Condensed Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net sales	$ 3,636	$ 3,108
Cost of sales, exclusive of depreciation and amortization	2,091	1,862
Selling, general and administrative	900	746
Depreciation	89	75
Amortization	30	26
Research and development, net	120	109
Interest expense	47	53
Interest income	(12)	(10)
Asbestos settlement – net	3	3
Other charges	21	25
Other income	(25)	(22)
Income before income taxes	372	241
Income tax expense	89	44
Income from continuing operations	283	197
Income from discontinued operations, net of tax	1,018	2,248
Net income attributable to the controlling and noncontrolling interests	1,301	2,445
Less: Net income attributable to noncontrolling interests	(39)	(35)
Net income (attributable to PPG)	1,262	2,410
Income from continuing operations, net of tax	277	191
Income from discontinued operations, net of tax	$ 985	$ 2,219
Income from continuing operations, net of tax	$ 1.99	$ 1.31
Income from discontinued operations, net of tax	$ 7.08	$ 15.18
Net income (attributable to PPG)	$ 9.07	$ 16.49
Income from continuing operations, net of tax	$ 1.97	$ 1.29
Income from discontinued operations, net of tax	$ 7.00	$ 15.02
Net income (attributable to PPG)	$ 8.97	$ 16.31
Dividends per common share	$ 0.61	$ 0.59