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Note 17 - Amounts Recognized in the Consolidated Statement of Financial Position (Details) - Other Postretirement Benefit Plans [Member] - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]    
Other benefit plan liabilities $ (78) $ (86)
Other Current Liabilities [Member]    
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]    
Other benefit plan liabilities (5) (8)
Pension and Other Postretirement Liabilities [Member]    
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]    
Other benefit plan liabilities $ (73) $ (78)