Consolidated Statement of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Income Statement [Abstract]
Net sales	$ 15,200		$ 14,885		$ 13,423
Cost of sales, exclusive of depreciation and amortization	9,069	[1]	9,081	[1]	8,214
Selling, general and administrative	3,335		3,234		2,979
Depreciation	355		346		346
Amortization of Intangible Assets	110		121		124
Research and development – net (See Note 22)	455		430		394
Interest expense	210		210		189
Interest income	(39)		(42)		(34)
Asbestos settlement – net (See Notes 11 and 15)	12		12		12
Business restructuring (See Note 7)	208		0		0
Other charges (See Note 15)	232		73		84
Other earnings (See Note 19)	(149)		(177)		(180)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	1,402		1,597		1,295
Income tax expense (See Note 13)	338		385		415
Net income attributable to the controlling and noncontrolling interests	1,064		1,212		880
Less: net income attributable to noncontrolling interests	123		117		111
Net income (attributable to PPG)	$ 941	[2]	$ 1,095		$ 769
Earnings per common share (See Note 12)
Net Income (attributable to PPG) (in dollars per share)	$ 6.13		$ 6.96		$ 4.67
Earnings per common share – assuming dilution (See Note 12)
Net Income (attributable to PPG) (in dollars per share)	$ 6.06		$ 6.87		$ 4.63

[1] Exclusive of depreciation and amortization.

[2] First quarter 2012 includes charge of $163 million or $1.06 per diluted share related to restructuring (See Note 7, "Business Restructuring") and charge of $99 million or $0.64 per diluted share related to environmental remediation (See Note 15, "Commitments and Contingent Liabilities").