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Note 16 - Retirement Plans (Details) - Major Funded and Unfunded Defined Benefit Plans With Accumulated Benefit Obligation in Excess of Plan Assets - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
UNITED STATES    
Note 16 - Retirement Plans (Details) - Major Funded and Unfunded Defined Benefit Plans With Accumulated Benefit Obligation in Excess of Plan Assets [Line Items]    
Projected benefit obligation $ 4,099 $ 4,438
Accumulated benefit obligation 4,098 4,436
Fair value of plan assets 3,793 4,160
Non-US [Member]    
Note 16 - Retirement Plans (Details) - Major Funded and Unfunded Defined Benefit Plans With Accumulated Benefit Obligation in Excess of Plan Assets [Line Items]    
Projected benefit obligation 524 623
Accumulated benefit obligation 516 613
Fair value of plan assets $ 412 $ 471