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Note 16 - Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Change in Benefit Obligation      
Special termination benefits $ 3 $ 9 $ 8
UNITED STATES      
Change in Benefit Obligation      
Projected benefit obligation at beginning of period 4,099 4,438  
Service cost 12 17 18
Interest cost 113 148 176
Benefit payments (395) (478)  
Actuarial loss (gain) 76 (35)  
Special termination benefits 3 9 8
Projected benefit obligation at end of period 3,908 4,099 4,438
Change in Plan Assets      
Fair value of plan assets at beginning of period 3,793 4,160  
Gain on plan assets 255 111  
Benefit payments (395) (478)  
Fair value of plan assets at end of period 3,653 3,793 4,160
Under Funded Status at end of period (255) (306)  
Accumulated benefit obligation at end of period 3,907 4,098  
Non-US [Member]      
Change in Benefit Obligation      
Projected benefit obligation at beginning of period 800 918  
Service cost 3 3 4
Interest cost 14 17 30
Benefit payments (48) (51)  
Actuarial loss (gain) 61 (24)  
Currency adjustments (14) (63)  
Projected benefit obligation at end of period 816 800 918
Change in Plan Assets      
Fair value of plan assets at beginning of period 728 795  
Gain on plan assets 19 31  
Employer contributions 4 4  
Benefit payments (48) (51)  
Currency adjustments (10) (51)  
Fair value of plan assets at end of period 693 728 $ 795
Under Funded Status at end of period (123) (72)  
Accumulated benefit obligation at end of period $ 806 $ 792