Condensed Consolidated Statement of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net sales	$ 3,781	$ 3,486
Cost of sales, exclusive of depreciation and amortization	2,181	1,902
Selling, general and administrative	906	875
Depreciation	87	79
Amortization	36	31
Research and development, net	112	109
Interest expense	26	25
Interest income	(5)	(4)
Pension settlement charge	0	22
Other charges	41	25
Other income	(24)	(24)
Income from continuing operations before income taxes	421	446
Income tax expense	87	110
Income from continuing operations	334	336
Income from discontinued operations, net of tax	6	6
Net income attributable to the controlling and noncontrolling interests	340	342
Less: Net income attributable to noncontrolling interests	(6)	(5)
Net income (attributable to PPG)	334	337
Income from continuing operations, net of tax	328	331
Income from discontinued operations, net of tax	$ 6	$ 6
Income from continuing operations, net of tax (in usd per share)	$ 1.32	$ 1.29
Income from discontinued operations, net of tax (in usd per share)	0.02	0.02
Net income (attributable to PPG) (in usd per share)	1.34	1.31
Income from continuing operations, net of tax (in usd per share)	1.31	1.28
Income from discontinued operations, net of tax (in usd per share)	0.02	0.02
Net income (attributable to PPG) (in usd per share)	1.33	1.30
Dividends per common share (in usd per share)	$ 0.45	$ 0.40