Condensed Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net sales	$ 3,935	$ 3,774	$ 11,653	$ 10,765
Cost of sales, exclusive of depreciation and amortization	2,229	2,161	6,626	6,286
Selling, general and administrative	941	910	2,826	2,581
Depreciation	87	85	260	245
Amortization	32	28	93	88
Research and development, net	120	117	366	344
Interest expense	47	48	142	148
Interest income	(13)	(11)	(38)	(30)
Business restructuring	0	98	0	98
Asbestos settlement – net	3	3	9	9
Other charges	150	119	190	168
Other income	(160)	(31)	(216)	(82)
Income from continuing operations before income taxes	499	247	1,395	910
Income tax expense	116	40	330	182
Income from continuing operations	383	207	1,065	728
(Loss)/income from discontinued operations, net of tax	(6)	48	1,005	2,343
Net income attributable to the controlling and noncontrolling interests	377	255	2,070	3,071
Less: Net income attributable to noncontrolling interests	(6)	(29)	(51)	(94)
Net income (attributable to PPG)	371	226	2,019	2,977
Income from continuing operations, net of tax	377	204	1,047	713
(Loss)/income from discontinued operations, net of tax	$ (6)	$ 22	$ 972	$ 2,264
Income from continuing operations, net of tax	$ 2.73	$ 1.43	$ 7.55	$ 4.93
(Loss)/income from discontinued operations, net of tax	$ (0.04)	$ 0.15	$ 7.01	$ 15.68
Net income (attributable to PPG)	$ 2.69	$ 1.58	$ 14.56	$ 20.61
Income from continuing operations, net of tax	$ 2.70	$ 1.41	$ 7.47	$ 4.88
(Loss)/income from discontinued operations, net of tax	$ (0.04)	$ 0.15	$ 6.94	$ 15.51
Net income (attributable to PPG)	$ 2.66	$ 1.56	$ 14.41	$ 20.39
Dividends per common share	$ 0.67	$ 0.61	$ 1.95	$ 1.81