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Note 16 - Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Change in Benefit Obligation    
Special termination benefits $ 9 $ 8
UNITED STATES    
Change in Benefit Obligation    
Projected benefit obligation at beginning of period 4,438 4,361
Service cost 17 18
Interest cost 148 176
Plan amendments   (61)
Benefit payments (478) (339)
Actuarial (gain) loss (35) 567
Settlements   (292)
Special termination benefits 9 8
Projected benefit obligation at end of period 4,099 4,438
Change in Plan Assets    
Fair value of plan assets at beginning of period 4,160 4,184
Gain on plan assets 111 607
Settlements   (292)
Benefit payments (478) (339)
Fair value of plan assets at end of period 3,793 4,160
Under Funded Status at end of period (306) (278)
Accumulated benefit obligation at end of period 4,098 4,436
Non-U.S. [Member]    
Change in Benefit Obligation    
Projected benefit obligation at beginning of period 918 960
Transfers   (31)
Service cost 3 4
Interest cost 17 30
Benefit payments (51) (61)
Actuarial (gain) loss (24) 119
Currency adjustments (63) (103)
Projected benefit obligation at end of period 800 918
Change in Plan Assets    
Fair value of plan assets at beginning of period 795 833
Transfers   (9)
Gain on plan assets 31 111
Employer contributions 4 7
Benefit payments (51) (61)
Currency adjustments (51) (86)
Fair value of plan assets at end of period 728 795
Under Funded Status at end of period (72) (123)
Accumulated benefit obligation at end of period $ 792 $ 907