Condensed Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Net sales	$ 4,082	$ 3,883	$ 7,718	$ 6,991
Cost of sales, exclusive of depreciation and amortization	2,306	2,263	4,397	4,125
Selling, general and administrative	985	925	1,885	1,671
Depreciation	84	85	173	160
Amortization	31	34	61	60
Research and development, net	126	118	246	227
Interest expense	48	47	95	100
Interest income	(13)	(9)	(25)	(19)
Asbestos settlement – net	3	3	6	6
Other charges	19	24	40	49
Other income	(31)	(29)	(56)	(51)
Income from continuing operations before income taxes	524	422	896	663
Income tax expense	125	98	214	142
Income from continuing operations	399	324	682	521
(Loss)/income from discontinued operations, net of tax	(7)	47	1,011	2,295
Net income attributable to the controlling and noncontrolling interests	392	371	1,693	2,816
Less: Net income attributable to noncontrolling interests	(6)	(30)	(45)	(65)
Net income (attributable to PPG)	386	341	1,648	2,751
Income from continuing operations, net of tax	393	318	670	509
(Loss)/income from discontinued operations, net of tax	$ (7)	$ 23	$ 978	$ 2,242
Income from continuing operations, net of tax	$ 2.83	$ 2.22	$ 4.82	$ 3.51
(Loss)/income from discontinued operations, net of tax	$ (0.05)	$ 0.16	$ 7.04	$ 15.46
Net income (attributable to PPG)	$ 2.78	$ 2.38	$ 11.86	$ 18.97
Income from continuing operations, net of tax	$ 2.80	$ 2.19	$ 4.77	$ 3.47
(Loss)/income from discontinued operations, net of tax	$ (0.05)	$ 0.16	$ 6.97	$ 15.29
Net income (attributable to PPG)	$ 2.75	$ 2.35	$ 11.74	$ 18.76
Dividends per common share	$ 0.67	$ 0.61	$ 1.28	$ 1.20