Commitments and Contingent Liabilities (Litigation Settlements Disclosure) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended		48 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012 Asbestos Issue LegalMatter	Dec. 31, 2013 Asbestos Issue LegalMatter	Dec. 31, 2013 Asbestos Settlement Liability, Current	Dec. 31, 2012 Asbestos Settlement Liability, Current	Dec. 31, 2011 Asbestos Settlement Liability, Current	Dec. 31, 2013 Asbestos Settlement Liability, Long-term	Dec. 31, 2012 Asbestos Settlement Liability, Long-term	Dec. 31, 2011 Asbestos Settlement Liability, Long-term	Dec. 31, 2013 Equity Forward (Asset) Liability	Dec. 31, 2012 Equity Forward (Asset) Liability	Dec. 31, 2011 Equity Forward (Asset) Liability	Dec. 31, 2013 Pretax Charge	Dec. 31, 2012 Pretax Charge	Dec. 31, 2011 Pretax Charge	Dec. 31, 2013 Maximum Asbestos Issue
Premises Claims Percentage																	2.00%
Loss Contingency Claims Settled Number			500
Loss Contingency, Number of Plaintiffs			360
Unreserved loss contingencies related to environmental matters, low estimate	$ 100	$ 100
Beginning balance/Prior year activity					683	593	578	237	241	243	(130)	(56)	(55)	12	12	12
Change in fair value:
PPG stock					75	72	(1)	0			0			75	72	(1)
Equity forward instrument					0			0			(77)	(74)	(1)	(77)	(74)	(1)
Accretion of asbestos liability					0			13	14	14	0			13	14	14
Reclassification					5	18	16	(5)	(18)	(16)	0			0
Ending balance/Activity during year					$ 763	$ 683	$ 593	$ 245	$ 237	$ 241	$ (207)	$ (130)	$ (56)	$ 11	$ 12	$ 12
Loss Contingency Claims in the Process of Being Settled			100
Loss Contingency Number of Claims not in the Process of Being Settled.			260
Loss Contingency Claims Being Litigated.				130