Note 20 - Major Funded and Unfunded Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Change in Benefit Obligation
Special termination benefits	$ 3	$ 5
U.S. [Member]
Change in Plan Assets
Over (under) funded status at end of period	135	40
Non-US [Member]
Change in Plan Assets
Over (under) funded status at end of period	(173)	(163)
Defined Benefit Plans [Member] \| U.S. [Member]
Change in Benefit Obligation
Projected benefit obligation at beginning of period	3,405	3,866
Service cost	10	13
Interest cost	122	109
Benefit payments	(349)	(414)
Actuarial loss (gain)	284	(174)
Special termination benefits	3	5
Projected benefit obligation at end of period	3,475	3,405
Change in Plan Assets
Fair value of plan assets at beginning of period	3,445	3,804
Gain on plan assets	514	55
Benefit payments	(349)	(414)
Fair value of plan assets at end of period	3,610	3,445
Over (under) funded status at end of period	135	40
Accumulated benefit obligation at end of period	3,474	3,403
Defined Benefit Plans [Member] \| Non-US [Member]
Change in Benefit Obligation
Projected benefit obligation at beginning of period	834	885
Service cost	3	3
Interest cost	13	12
Benefit payments	(48)	(50)
Actuarial loss (gain)	36
Currency adjustments	(4)	(16)
Projected benefit obligation at end of period	834	834
Change in Plan Assets
Fair value of plan assets at beginning of period	671	722
Gain on plan assets	28	5
Employer contributions	10	4
Benefit payments	(48)	(50)
Currency adjustments		(10)
Fair value of plan assets at end of period	661	671
Over (under) funded status at end of period	(173)	(163)
Accumulated benefit obligation at end of period	$ 825	$ 824

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Change in Plan Assets

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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase in benefit obligation for benefits provided to employees payable from defined benefit plan or payable upon retirement.

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