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Note 11 - Other Assets and Other Liabilities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Accrual, Noncurrent   $ 440 $ 681
Loss Contingency, Accrual, Current   238  
Proceeds from Deposits from Customers   $ 197  
Pittsburgh Corning Corporation (PCC) [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Equity Method Investment, Ownership Percentage   50.00%  
Chinese Customer [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Customer Advances and Deposits, Nonrefundable   $ 400  
Proceeds from Deposits from Customers   $ 197  
Chinese Customer [Member] | Scenario, Forecast [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Proceeds from Deposits from Customers $ 197    
PPG Industries, Inc. [Member] | Pittsburgh Corning Corporation (PCC) [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Equity Method Investment, Ownership Percentage   50.00%  
Asbestos Litigation [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency Accrual   $ 678 $ 681
Loss Contingency, Accrual, Noncurrent   440  
Asbestos Litigation [Member] | Fixed Series of Payment [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Accrual, Noncurrent   290  
Asbestos Litigation [Member] | Non-PCC Asbestos Litigation [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Accrual, Noncurrent   150  
Asbestos Litigation [Member] | Pittsburgh Corning Europe (PCE) [Member]      
Note 11 - Other Assets and Other Liabilities (Details) [Line Items]      
Loss Contingency, Accrual, Current   $ 238