Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 3,672	$ 3,662
Cost of sales, exclusive of depreciation and amortization	2,013	2,065
Selling, general and administrative	919	914
Depreciation	91	87
Amortization	30	33
Research and development, net	118	119
Interest expense	31	29
Interest income	(7)	(11)
Asbestos settlement, net	3	3
Other charges	21	24
Other income	(18)	(31)
Income from continuing operations before income taxes	471	430
Income tax expense	117	104
Income from continuing operations	354	326
Income from discontinued operations, net of tax	0	(1)
Net income attributable to the controlling and noncontrolling interests	354	327
Less: Net income attributable to noncontrolling interests	(7)	(5)
Net income (attributable to PPG)	347	322
Income from continuing operations, net of tax	347	321
Income from discontinued operations, net of tax	$ 0	$ 1
Income from continuing operations, net of tax	$ 1.30	$ 1.17
Income from discontinued operations, net of tax	0.00	0.01
Net income (attributable to PPG)	1.30	1.18
Income from continuing operations, net of tax	1.29	1.16
Income from discontinued operations, net of tax	0.00	0.01
Net income (attributable to PPG)	1.29	1.17
Dividends per common share	$ 0.36	$ 0.33