Commitments and Contingent Liabilities (Additional Information) (Details)
$ in Millions |
1 Months Ended |
3 Months Ended |
9 Months Ended |
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May 14, 2002
shares
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Sep. 30, 2016
USD ($)
Location
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Sep. 30, 2015
USD ($)
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Sep. 30, 2016
USD ($)
Location
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Sep. 30, 2015
USD ($)
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Jun. 30, 2016
USD ($)
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Dec. 31, 2015
USD ($)
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Dec. 31, 2014
USD ($)
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Dec. 31, 2011
Location
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Dec. 31, 2008
USD ($)
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| Commitments and Contingencies Disclosure [Line Items] |
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| Interest Penalty Asserted by a Foreign Tax Authority |
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$ 70.0
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$ 70.0
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| Reserves for environmental contingencies |
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$ 209.0
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$ 209.0
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$ 233.0
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| Accrual for Environmental Loss Contingencies, Component Amount |
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3.6
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3.6
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| Reserves for environmental contingencies classified as current liabilities |
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57.0
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57.0
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51.0
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| Outstanding letters of credit |
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175.0
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175.0
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| Guarantees |
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21.0
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21.0
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| Payments for Environmental Liabilities |
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12.0
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18.0
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35.0
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84.0
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| Prepayment of future pre-tax cash payments to the trust |
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$ 764.0
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| Minimum [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Unreserved loss contingencies related to environmental matters |
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75.0
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| Maximum [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Unreserved loss contingencies related to environmental matters |
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200.0
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| Jersey City Manufacturing Plant [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Reserves for environmental contingencies |
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$ 112.0
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$ 112.0
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133.0
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| Orphan Sites Settlement [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Total number of sites to be remediated | Location |
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6
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6
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| Judicial Consent Order [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Total number of sites to be remediated | Location |
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19
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19
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20
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| Other Environmental Contingencies [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Reserves for environmental contingencies |
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$ 97.0
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$ 97.0
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$ 100.0
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| Environmental remediation charge |
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$ 3.0
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$ 3.0
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$ 11.0
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$ 9.0
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| Asbestos Issue [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| PPG's reserve for asbestos-related claims that will not be channeled to the Trust |
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$ 162.0
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$ 162.0
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| Soil Treatment, Transportation And Disposal Of Excavated Soil [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Percentage of the total remaining reserve |
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33.00%
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33.00%
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| Construction Services (Related To Soil Excavation, Groundwater Management And Site Security) [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Percentage of the total remaining reserve |
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39.00%
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39.00%
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| Pittsburgh Corning Corporation [Member] | Asbestos Issue [Member] |
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| Commitments and Contingencies Disclosure [Line Items] |
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| Settlement Payables Shares | shares |
2,777,778
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| Settlement Prepayment Discount Rate |
5.50%
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| Insurance Settlements Receivable |
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$ 1,700.0
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