Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income attributable to the controlling and noncontrolling interests	$ 364	$ 342	$ 811	$ 973
Other comprehensive income, net of tax:
Pension and other postretirement benefits (Note 12)	13	45	71	94
Unrealized currency translation adjustment	85	(410)	38	(126)
Net change - derivatives (Note 15)	(4)	(32)	(10)	(29)
Other comprehensive income (loss), net of tax	94	(397)	99	(61)
Total comprehensive income (loss)	458	(55)	910	912
Less: amounts attributable to noncontrolling interests:
Net income	(25)	(31)	(97)	(94)
Unrealized currency translation adjustment	(5)	16	(3)	8
Comprehensive income (loss) attributable to PPG	$ 428	$ (70)	$ 810	$ 826

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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