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