Note 18 - Component of the Net Periodic benefit Cost - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]
Total net pension (income) expense			$ (65)	$ (72)
Defined Benefit Plans [Member] | U.S. [Member]
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]
Service cost	$ 2	$ 3	8	8
Interest cost	21	30	64	91
Expected return on plan assets	(48)	(53)	(146)	(160)
Prior service credit	(2)	(2)	(5)	(5)
Actuarial loss	4		11
Net pension income before special termination benefits	(23)	(22)	(68)	(66)
Special termination benefits	1		2	2
Curtailment gain				(2)
Net pension income from major plans	(22)	(22)	(66)	(66)
Total net pension (income) expense	(22)	(22)	(66)	(66)
Defined Benefit Plans [Member] | Non-US [Member]
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]
Service cost	1		3	2
Interest cost	2	3	6	9
Expected return on plan assets	(5)	(6)	(14)	(17)
Actuarial loss	$ 2	2	5	4
Net pension income before special termination benefits		(1)		(2)
Net pension income from major plans		(1)		(2)
Other plans			1	(4)
Total net pension (income) expense		$ (1)	$ 1	$ (6)