Condensed Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income attributable to the controlling and noncontrolling interests	$ 371	$ 396	$ 2,816	$ 447
Other comprehensive income, net of tax:
Pension and other postretirement benefits	17	50	198	58
Unrealized currency translation adjustment	(59)	(184)	(190)	(47)
Unrealized losses on marketable securities	1	0	1	0
Net change – derivatives	2	(12)	7	(6)
Other comprehensive (loss) income, net of tax	(39)	(146)	16	5
Total comprehensive income	332	250	2,832	452
Less: amounts attributable to noncontrolling interests:
Net income	(30)	(34)	(65)	(72)
Unrealized currency translation adjustment	8	6	11	2
Comprehensive income attributable to PPG	$ 310	$ 222	$ 2,778	$ 382