Commitments and Contingent Liabilities (Additional Information) (Details) (USD $)	1 Months Ended		3 Months Ended			3 Months Ended			3 Months Ended				3 Months Ended					3 Months Ended		3 Months Ended								3 Months Ended			48 Months Ended						3 Months Ended		1 Months Ended		3 Months Ended
	Jan. 31, 2000 Plaintiff	Dec. 31, 1999 cases	Mar. 31, 2014 LegalMatter	Mar. 31, 2013	Dec. 31, 2013	Sep. 30, 2008 Orphan Sites Settlement [Member] Location	Mar. 31, 2014 Orphan Sites Settlement [Member] Location	Mar. 31, 2014 Construction Services (Related To Soil Excavation, Groundwater Management And Site Security) [Member]	Sep. 30, 2013 Jersey City Manufacturing Plant [Member]	Sep. 30, 2006 Jersey City Manufacturing Plant [Member]	Mar. 31, 2014 Jersey City Manufacturing Plant [Member]	Dec. 31, 2013 Jersey City Manufacturing Plant [Member]	Mar. 31, 2014 Jersey City Manufacturing Plant [Member] Minimum [Member]	Mar. 31, 2014 Other Environmental Contingencies [Member]	Dec. 31, 2013 Other Environmental Contingencies [Member]	Mar. 31, 2014 Administrative Content Order Nineteen Ninety Aco [Member] Location	Mar. 31, 2014 Soil Treatment, Transportation And Disposal Of Excavated Soil [Member]	Mar. 31, 2012 New Jersey Remediation Sites [Member]	Mar. 31, 2014 New Jersey Remediation Sites [Member] ton	Mar. 31, 2014 Judicial Consent Order [Member] Location	Mar. 31, 2014 Administrative Content Order 1990 ACO [Member] Minimum [Member] ton	Mar. 31, 2014 Unfinished Environmental Remediation [Member] Orphan Sites Settlement [Member] Location	Sep. 30, 2008 Unfinished Environmental Remediation [Member] Orphan Sites Settlement [Member] Location	Mar. 31, 2014 Unfinished Environmental Remediation [Member] Administrative Content Order Nineteen Ninety Aco [Member] Location	Mar. 31, 2014 Unfinished Environmental Remediation [Member] Administrative Content Order 1990 ACO [Member] Location	Sep. 30, 2008 Partially Liable Environmental Remediation [Member] Orphan Sites Settlement [Member] Location	Mar. 31, 2014 Finished Environmental Remediation [Member] Administrative Content Order Nineteen Ninety Aco [Member] Location	Mar. 31, 2014 Future Period [Member]	Mar. 31, 2014 Other Charges [Member]	Mar. 31, 2013 Other Charges [Member]	Dec. 31, 2012 Asbestos Issue [Member] LegalMatter	Mar. 31, 2014 Asbestos Issue [Member] LegalMatter	Dec. 31, 2013 Asbestos Issue [Member] LegalMatter	Mar. 31, 2013 Asbestos Issue [Member] LegalMatter	Dec. 31, 2008 Asbestos Issue [Member]	Mar. 31, 2014 Asbestos Issue [Member] Maximum [Member]	Mar. 31, 2000 Pittsburgh Corning Corporation [Member]	Mar. 31, 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]	Mar. 31, 2013 Pittsburgh Corning Corporation [Member] Asbestos Issue [Member] Third Amendment [Member]
Commitments and Contingencies Disclosure [Line Items]
Asbestos settlement			$ 249,000,000		$ 245,000,000
Private putative class cases filed			30
PPG percent ownership interest																																						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																																								2003-06-30
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%
Claims alleging personal injury caused by asbestos on PPG premises, approximate number of claims settled																															500
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
PC-related claims at trial that PPG was found not responsible		2
Number of plaintiffs one jury found PPG, for the first time, partly responsible for injuries	5																														360
Reserves for environmental contingencies			273,000,000		310,000,000						168,000,000	204,000,000		105,000,000	106,000,000
Percentage of the total remaining reserve								43.00%									45.00%
Reserves for environmental contingencies classified as current liabilities			105,000,000		105,000,000
Environmental remediation charge			0	12,000,000					89,000,000	165,000,000								145,000,000											2,000,000	13,000,000
Environmental Remediation Charge				12,000,000
Cash outlays related to environmental remediation			39,000,000	23,000,000
Expected cash payments for environmental remediation costs for remaining fiscal year			100,000,000
Expectations of cash outlays for environmental remediation costs through 2014																												100,000,000
Expectations of cash outlays for environmental remediation costs, low estimate annually 2015 and 2016																												10,000,000
Expectations of cash outlays for environmental remediation costs, high estimate annually 2015 and 2016																												30,000,000
Total number of sites to be remediated						53										61				20		6	6	14	14	10	47
PPG agrees to reimburse the NJDEP for a portion of past costs						5,000,000
Judicial Consent Order combining ACO and Orphan Sites Settlement, reparation claim payable to the City of Jersey City																				1,500,000
Payment time period																				5 years
Soil that may be potentially impacted for all remaining sites (in tons)																			1,000,000		70,000
Time Period for Final Resolution of New Jersey Chrome Site Legal Matters													2 years
Unreserved loss contingencies related to environmental matters, low estimate			100,000,000
Unreserved loss contingencies related to environmental matters, high estimate			200,000,000
Number of sites							3
Reserve for product warranties			11,000,000		10,000,000
Outstanding letters of credit			109,000,000
Guarantees			$ 51,000,000
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