Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net sales	$ 15,108	$ 13,512	$ 13,153
Cost of sales, exclusive of depreciation and amortization	8,636	7,905	7,865
Selling, general and administrative	3,699	3,200	3,122
Depreciation	356	312	305
Amortization	119	109	120
Research and development, net	488	453	428
Interest expense	196	210	210
Interest income	(43)	(39)	(42)
Asbestos settlement, net	11	12	12
Business restructuring	98	208	0
Other charges	190	224	63
Other income	(131)	(139)	(152)
Income before income taxes	1,489	1,057	1,222
Income tax expense	333	221	260
Income from continuing operations	1,156	836	962
Income from discontinued operations, net of tax	2,197	228	250
Net income attributable to the controlling and noncontrolling interests	3,353	1,064	1,212
Less: net income attributable to noncontrolling interests	122	123	117
Net income (attributable to PPG)	3,231	941	1,095
Continuing operations	1,034	726	858
Discontinued operations	$ 2,197	$ 215	$ 237
Earnings per common share
Continuing operations (in dollars per share)	$ 7.21	$ 4.73	$ 5.45
Discontinued operations (in dollars per share)	$ 15.32	$ 1.40	$ 1.51
Net Income (attributable to PPG) (in dollars per share)	$ 22.53	$ 6.13	$ 6.96
Earnings per common share - assuming dilution
Continuing operations (in dollars per share)	$ 7.13	$ 4.69	$ 5.40
Discontinued operations (in dollars per share)	$ 15.14	$ 1.37	$ 1.47
Net Income (attributable to PPG) (in dollars per share)	$ 22.27	$ 6.06	$ 6.87