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Note 2 - Commitments, Contingencies, and Guarantees (Details) $ in Millions | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) | Nov. 12, 2013 USD ($) | Apr. 16, 2000 USD ($)
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Recorded Unconditional Purchase Obligation | $ 311 |  | $ 311 |  | $ 287 |  |
Number of Hazardous Waste Sites | 15 |  | 15 |  |  |  |
Contingent Guarantees [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 174 |  | $ 174 |  | 150 |  |
Pittsburgh Corning Corporation (PCC) [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  | 50.00% |  |  |  |
Equity Method Investments |  |  |  |  |  |  | $ 0
Pittsburgh Corning Europe (PCE) [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Equity Method Investments, Fair Value Disclosure | $ 245 |  | $ 245 |  | 241 |  |
Equity Method Investments | 151 |  | 151 |  | 162 |  |
Environmental Cleanup And Related Litigation [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Accrual for Environmental Loss Contingencies | $ 41 |  | $ 41 |  | 43 |  |
PPG Industries, Inc. [Member] | Pittsburgh Corning Corporation (PCC) [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 50.00% |  | 50.00% |  |  |  |
Asbestos Litigation [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Asbestos Settlement (Credit) Charge | $ 2 | $ 4 | $ 3 | $ 6 |  |  |
Asbestos Litigation [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | $ 290 |
Asbestos Litigation [Member] | First Payment [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | 70 |
Asbestos Litigation [Member] | First Subsequent Anniversary [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | 35 |
Asbestos Litigation [Member] | Second Subsequent Anniversary [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | 50 |
Asbestos Litigation [Member] | Third Subsequent Anniversary [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | 35 |
Asbestos Litigation [Member] | Fourth Subsequent Anniversary [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | 50 |
Asbestos Litigation [Member] | Fifth Subsequent Anniversary [Member] | Amended Pittsburgh Corning Corporation Plan [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Required Payments Per Reorganization Plan |  |  |  |  |  | $ 50 |
Asbestos Litigation [Member] | Pittsburgh Corning Corporation (PCC) [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Pending Claims, Number |  |  |  |  |  |  | 11,800
Non-PCC Asbestos Litigation [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Number of Other Cases Currently Involved Alleging Injuries from Asbestos and Similar Amounts of Monetary Damages Per Case |  |  | 9,700 |  |  |  |
Number of Claims in Other Cases Currently Involved Alleging Injuries from Asbestos and Similar Amounts of Monetary Damages Per Case |  |  | 37,300 |  |  |  |
Insurance Recoveries |  |  | $ 19 |  |  |  |
Loss Contingency Accrual, Period Increase (Decrease) |  |  | $ 150 |  |  |  |
Undiscounted Projection of Claims and Related Legal Fees, Period |  |  | 20 years |  |  |  |
Amended PCC Plan and Non-PCC Asbestos Claims [Member] |  |  |  |  |  |  |
Note 2 - Commitments, Contingencies, and Guarantees (Details) [Line Items] |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss | $ 685 |  | $ 685 |  | $ 681 |  |

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