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Note 19 - Amounts Recognized in Accumulated Other Comprehensive Loss For All Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
U.S. [Member]    
Amounts Recognized In Accumulated Other Comprehensive Loss For All Major Funded And Unfunded Defined Benefit Plans [Line Items]    
Prior service credit $ 27 $ 36
Net actuarial loss (258) (271)
Total (231) (235)
Non-US [Member]    
Amounts Recognized In Accumulated Other Comprehensive Loss For All Major Funded And Unfunded Defined Benefit Plans [Line Items]    
Prior service credit 3 3
Net actuarial loss (126) (110)
Total $ (123) $ (107)