Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net sales	$ 3,806	$ 3,782	$ 7,292	$ 7,193
Cost of sales, exclusive of depreciation and amortization	2,082	1,988	3,987	3,805
Selling, general and administrative	865	930	1,753	1,827
Depreciation	81	79	160	158
Amortization	32	30	63	60
Research and development, net	113	115	223	229
Interest expense	26	31	51	62
Interest income	(4)	(7)	(8)	(14)
Pension settlement charge	0	0	22	0
Asbestos settlement, net	0	2	0	5
Other charges	12	29	26	46
Other income	(72)	(45)	(96)	(59)
Income from continuing operations before income taxes	671	630	1,111	1,074
Income tax expense	162	285	269	394
Income from continuing operations	509	345	842	680
(Loss)/Income from discontinued operations, net of tax	(3)	31	3	50
Net income attributable to the controlling and noncontrolling interests	506	376	845	730
Less: Net income attributable to noncontrolling interests	(5)	(6)	(10)	(13)
Net income (attributable to PPG)	501	370	835	717
Income from continuing operations, net of tax	504	339	832	667
(Loss)/Income from discontinued operations, net of tax	$ (3)	$ 31	$ 3	$ 50
Income from continuing operations, net of tax (in usd per share)	$ 1.96	$ 1.26	$ 3.23	$ 2.49
Income from discontinued operations, net of tax (in usd per share)	(0.01)	0.12	0.01	0.19
Net income (attributable to PPG) (in usd per share)	1.95	1.38	3.24	2.68
Income from continuing operations, net of tax (in usd per share)	1.95	1.25	3.21	2.47
Income from discontinued operations, net of tax (in usd per share)	(0.01)	0.12	0.01	0.19
Net income (attributable to PPG) (in usd per share)	1.94	1.37	3.22	2.66
Dividends per common share (in usd per share)	$ 0.40	$ 0.40	$ 0.80	$ 0.76