Commitments and Contingent Liabilities (Additional Information) (Details) (USD $)	3 Months Ended		9 Months Ended					3 Months Ended														3 Months Ended		9 Months Ended		105 Months Ended					3 Months Ended		1 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jul. 31, 2014	Dec. 31, 2013	Sep. 30, 2014 Construction Services (Related To Soil Excavation, Groundwater Management And Site Security) [Member]	Sep. 30, 2014 Jersey City Manufacturing Plant [Member]	Sep. 30, 2013 Jersey City Manufacturing Plant [Member]	Dec. 31, 2013 Jersey City Manufacturing Plant [Member]	Sep. 30, 2014 New Jersey Remediation Sites [Member] ton	Sep. 30, 2014 Administrative Content Order 1990 ACO [Member] Location	Sep. 30, 2014 Orphan Sites Settlement [Member] Location	Sep. 30, 2014 Judicial Consent Order [Member] Location	Sep. 30, 2014 Other Environmental Contingencies [Member]	Dec. 31, 2013 Other Environmental Contingencies [Member]	Sep. 30, 2014 Soil Treatment, Transportation And Disposal Of Excavated Soil [Member]	Sep. 30, 2014 Unfinished Environmental Remediation [Member] Administrative Content Order 1990 ACO [Member] Location	Sep. 30, 2014 Unfinished Environmental Remediation [Member] Orphan Sites Settlement [Member] Location	Sep. 30, 2008 Unfinished Environmental Remediation [Member] Orphan Sites Settlement [Member] Location	Sep. 30, 2014 Finished Environmental Remediation [Member] Administrative Content Order 1990 ACO [Member] Location	Sep. 30, 2014 Other Charges [Member]	Sep. 30, 2013 Other Charges [Member]	Sep. 30, 2014 Other Charges [Member]	Sep. 30, 2013 Other Charges [Member]	Sep. 30, 2014 Asbestos Issue [Member] LegalMatter	Dec. 31, 2013 Asbestos Issue [Member]	Jun. 30, 2013 Asbestos Issue [Member] LegalMatter	Dec. 31, 2008 Asbestos Issue [Member]	Sep. 30, 2014 Asbestos Issue [Member] Maximum [Member]	Mar. 31, 2000 Pittsburgh Corning Corporation [Member]	Sep. 30, 2014 Pittsburgh Corning Corporation [Member]	Dec. 31, 2008 Pittsburgh Corning Corporation [Member] Asbestos Issue [Member]	May 14, 2002 Pittsburgh Corning Corporation [Member] Asbestos Issue [Member]	Sep. 30, 2014 Pittsburgh Corning Corporation [Member] Asbestos Issue [Member]
Commitments and Contingencies Disclosure [Line Items]
Interest Penalty Asserted by a Foreign Tax Authority	$ 70,000,000		$ 70,000,000
PPG percent ownership interest					40.00%																											50.00%
Number of pending cases																										114,000		114,000
After-tax charge, write-off of investment in PC, related to PC filing for chapter 11 bankruptcy																															35,000,000
Number of days after effective date of a confirmed reorganization plan																															30 days
Number of days after second amended reorganization plan																																		30 days
Agreement to convey assets to the PC asbestos settlement trust (the "Trust"), shares of PPG common stock																																	1,388,889	1,388,889
Future PPG cash payments to the Trust																																	825,000,000	998,000,000
Future PPG cash payments to the Trust, prepayment discount rate																																	5.50%	5.50%
Future PPG legal fees and expenses on behalf of the Trust																																		30,000,000
Fixed payment schedule, period																																		21 years
Fixed payment schedule, effective date																																		June 30, 2003
Future cash payments to the Trust by PPG's participating historical insurance carriers																																	1,700,000,000	1,700,000,000
Future cash payments to the Trust by PPG's participating historical insurance carriers, prepayment discount rate																																	5.50%	5.50%
Period of funding effective date																																			30 days
Percentage of premises claims currently comprised of the total of asbestos related claims against PPG																														2.00%
Loss Contingency, Claims Settled, Number																										580
Loss Contingency, Number of Plaintiffs																										325
Loss Contingency Claims in the Process of Being Settled																										80
Loss Contingency Number of Claims not in the Process of Being Settled.																										245
Loss Contingency Claims Being Litigated.																										125
Reduction in cash obligation to the Trust, corresponding increase in reserve for PPG claims responsibility																													162,000,000
PPG's reserve for asbestos-related claims that will not be channeled to the Trust																										162,000,000	162,000,000
Reserves for environmental contingencies	375,000,000		375,000,000			337,000,000		270,000,000		231,000,000					105,000,000	106,000,000
Percentage of the total remaining reserve							47.00%										36.00%
Reserves for environmental contingencies classified as current liabilities	212,000,000		212,000,000			133,000,000
Environmental remediation costs	138,000,000	89,000,000	138,000,000	101,000,000				136,000,000	89,000,000													138,000,000	92,000,000	143,000,000	107,000,000
Amount Of Soil											1,000,000
Cash outlays related to environmental remediation	31,000,000	21,000,000	106,000,000	72,000,000
Total number of sites to be remediated												61		20				14	6	6	47
Unreserved loss contingencies related to environmental matters, low estimate			75,000,000
Unreserved loss contingencies related to environmental matters, high estimate			200,000,000
Number of sites													3
Reserve for product warranties	11,000,000		11,000,000			10,000,000
Outstanding letters of credit	117,000,000		117,000,000
Guarantees	50,000,000		50,000,000
Environmental Remediation Charge				$ 12,000,000