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Note 19 - Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Change in Benefit Obligation    
Special termination benefits $ 5 $ 13
U.S. [Member]    
Change in Plan Assets    
Over (under) funded status at end of period 40 (62)
Non-US [Member]    
Change in Plan Assets    
Over (under) funded status at end of period (163) (163)
Defined Benefit Plans [Member] | U.S. [Member]    
Change in Benefit Obligation    
Projected benefit obligation at beginning of period 3,866 3,908
Service cost 13 12
Interest cost 109 115
Benefit payments (414) (352)
Actuarial (gain) loss (174) 170
Special termination benefits 5 13
Projected benefit obligation at end of period 3,405 3,866
Change in Plan Assets    
Fair value of plan assets at beginning of period 3,804 3,653
Gain on plan assets 55 503
Benefit payments (414) (352)
Fair value of plan assets at end of period 3,445 3,804
Over (under) funded status at end of period 40 (62)
Accumulated benefit obligation at end of period 3,403 3,864
Defined Benefit Plans [Member] | Non-US [Member]    
Change in Benefit Obligation    
Projected benefit obligation at beginning of period 885 816
Service cost 3 3
Interest cost 12 12
Benefit payments (50) (48)
Actuarial (gain) loss   37
Currency adjustments (16) 65
Projected benefit obligation at end of period 834 885
Change in Plan Assets    
Fair value of plan assets at beginning of period 722 693
Gain on plan assets 5 27
Employer contributions 4 5
Benefit payments (50) (48)
Currency adjustments (10) 45
Fair value of plan assets at end of period 671 722
Over (under) funded status at end of period (163) (163)
Accumulated benefit obligation at end of period $ 824 $ 874