Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net income attributable to the controlling and noncontrolling interests	$ 3,353	$ 1,064	$ 1,212
Other comprehensive income / (loss), net of tax
Unrealized foreign currency translation adjustment	(51)	146	(197)
Defined benefit pension and other postretirement benefit adjustments	440		(169)
Net change – derivative financial instruments	10	(7)	(32)
Other comprehensive income / (loss), net of tax	399	139	(398)
Total comprehensive income	3,752	1,203	814
Less: amounts attributable to noncontrolling interests:
Net income	(122)	(123)	(117)
Unrealized foreign currency translation adjustment	7	(5)	9
Comprehensive income attributable to PPG	$ 3,637	$ 1,075	$ 706