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Note 17 - Pension Income From Continuing Operations For All Defined Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
U.S. [Member]      
Pension Income Expense From Continuing Operations For All Defined Benefit Plans [Line Items]      
Service cost $ 12 $ 12 $ 17
Interest cost 115 113 148
Expected return on plan assets (243) (262) (272)
Prior service credit (7) (7) (8)
Actuarial loss   7  
Pension income before special termination benefits (123) (137) (115)
Special termination benefits 13 3 9
Net pension income for major defined benefit plans (110) (134) (106)
Net pension income (110) (134) (106)
Non-US [Member]      
Pension Income Expense From Continuing Operations For All Defined Benefit Plans [Line Items]      
Service cost 3 3 3
Interest cost 12 14 17
Expected return on plan assets (27) (28) (30)
Actuarial loss 3   2
Pension income before special termination benefits (9) (11) (8)
Net pension income for major defined benefit plans (9) (11) (8)
Other plans including unfunded plans   (2) 4
Net pension income $ (9) $ (13) $ (4)