Commitments and Contingent Liabilities (Tables)

3 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Environmental Liabilities [Table Text Block]

As of March 31, 2017 and December 31, 2016, PPG had reserves for environmental contingencies associated with PPG’s former chromium manufacturing plant in Jersey City, N.J. and associated sites (“New Jersey Chrome”) and for other environmental contingencies, including National Priority List sites and legacy glass and chemical manufacturing sites. These reserves are reported as "Accounts payable and accrued liabilities" and "Other liabilities" in the accompanying condensed consolidated balance sheet.

Environmental Reserves
($ in millions)	March 31, 2017		December 31, 2016
New Jersey Chrome	$	158	$	163
Legacy glass and chemical	68		70
Other	53		52
Total	$	279	$	285
Current portion	$	76	$	76

Environmental Costs [Table Text Block]

Pre-tax charges against income for environmental remediation costs are included in "Other charges" in the accompanying condensed consolidated statement of income. The pre-tax charges and cash outlays related to such environmental remediation for the three months ended March 31, 2017 and 2016 were as follows:

	Three Months Ended March 31
($ in millions)	2017		2016
Environmental remediation pre-tax charges	$	1	$	5
Cash outlays for environmental remediation activities	$	12	$	14