Note 17 - Component of the Net Periodic benefit Cost - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]
Total net pension income			$ (72)	$ (81)
Defined Benefit Plans [Member] | U.S. [Member]
Pension Income Expense From Continuing And Discontinued Operations For Major Defined Benefit Plans [Line Items]
Service cost	$ 3	$ 4	8	10
Interest cost	30	27	91	82
Expected return on plan assets	(53)	(55)	(160)	(167)
Prior service credit	(2)	(2)	(5)	(6)
Actuarial loss		1		4
Net pension income before special termination benefits	(22)	(25)	(66)	(77)
Special termination benefits		3	2	4
Curtailment gain			(2)
Net pension income from major plans	(22)	(22)	(66)	(73)
Total net pension income	(22)	(22)	(66)	(73)
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	2	3
Interest cost	3	3	9	9
Expected return on plan assets	(6)	(7)	(17)	(20)
Actuarial loss	2	1	4	3
Net pension income before special termination benefits	(1)	(2)	(2)	(5)
Net pension income from major plans	(1)	(2)	(2)	(5)
Other plans		(3)	(4)	(3)
Total net pension income	$ (1)	$ (5)	$ (6)	$ (8)