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Note 19 - Major Funded and Unfunded Defined Benefit Plans With Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
U.S. [Member]    
Major Funded And Unfunded Defined Benefit Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Line Items]    
Projected benefit obligation   $ 3,866
Accumulated benefit obligation   3,864
Fair value of plan assets   3,804
Non-US [Member]    
Major Funded And Unfunded Defined Benefit Plans With Accumulated Benefit Obligation In Excess Of Plan Assets [Line Items]    
Projected benefit obligation $ 578 617
Accumulated benefit obligation 568 606
Fair value of plan assets $ 382 $ 419