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Note 16 - Financial Instruments (Details) - Derivatives Not Designated as Hedging Instruments - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Other Nonoperating Income (Expense) [Member]        
Note 16 - Financial Instruments (Details) - Derivatives Not Designated as Hedging Instruments [Line Items]        
Other charges, net $ (6) $ 4 $ 15 $ 12