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Note 19 - Retirement Plans - Components of the Pension Obligation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Service cost $ 0 $ 0 $ 0
Interest cost 2 1 1
UNITED STATES      
Over (under) funded status at end of period 1,160 1,177  
UNITED STATES | Pension Plan [Member]      
Net benefit obligation at beginning of period 2,482 3,132  
Service cost 13 13 11
Interest cost 117 80 47
Benefit payments (283) (294)  
Plan Amendments 29 28  
Actuarial gain 28 (479)  
Special termination benefits 0 2  
Currency adjustments 0 0  
Net benefit obligation at end of period 2,386 2,482 3,132
Fair value of plan assets at beginning of period 3,659 4,105  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 170 (152)  
Employer contributions 0 0  
Benefit payments (283) (294)  
Currency adjustments 0 0  
Fair value of plan assets at end of period 3,546 3,659 4,105
Over (under) funded status at end of period 1,160 1,177  
Accumulated benefit obligation at end of period 2,384 2,482  
Foreign Plan [Member]      
Over (under) funded status at end of period (60) (51)  
Foreign Plan [Member] | Pension Plan [Member]      
Net benefit obligation at beginning of period 577 816  
Service cost 2 3 3
Interest cost 20 9 5
Benefit payments (43) (44)  
Plan Amendments 0 0  
Actuarial gain 12 (165)  
Special termination benefits 0 0  
Currency adjustments 20 (42)  
Net benefit obligation at end of period 588 577 816
Fair value of plan assets at beginning of period 526 626  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 25 (31)  
Employer contributions 6 5  
Benefit payments (43) (44)  
Currency adjustments 14 (30)  
Fair value of plan assets at end of period 528 526 $ 626
Over (under) funded status at end of period (60) (51)  
Accumulated benefit obligation at end of period $ 579 $ 568