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Note 20 - Pension Income From Continuing Operations For All Defined Benefit Plans (Details) - Defined Benefit Plans [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
U.S. [Member]    
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]    
Service cost $ 11 $ 10
Interest cost 86 122
Expected return on plan assets (196) (214)
Prior service credit (7) (7)
Actuarial loss 15  
Pension income before special termination benefits (91) (89)
Special termination benefits 3 3
Curtailment gains   (2)
Settlement losses 9  
Net pension income for major defined benefit plans (79) (88)
Net pension (income), expense (79) (88)
Non-US [Member]    
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]    
Service cost 3 3
Interest cost 9 13
Expected return on plan assets (19) (22)
Actuarial loss 7 5
Pension income before special termination benefits   (1)
Curtailment gains   (5)
Net pension income for major defined benefit plans   (1)
Other plans including unfunded plans 1 (3)
Net pension (income), expense $ 1 $ (4)