Note 17 - Restructuring Liabilities - Restructuring Reserve Activity (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Beginning Balance		$ 8	$ 10	$ 12	$ 12
Charges		1	1	7
Utilization/cash payments		(3)	(3)	(7)
Other adjustments and reclasses	[1]			(2)
Ending Balance		6	8	10	6
Severance Reserve [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	[2]	7	9	11	11
Charges	[2]	1	1	6
Utilization/cash payments	[2]	(3)	(3)	(7)
Other adjustments and reclasses	[1],[2]			(1)
Ending Balance	[2]	5	7	9	5
Exit Costs Reserve [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	[2]	1	1	1	1
Charges	[2]			1
Other adjustments and reclasses	[1],[2]			(1)
Ending Balance	[2]	$ 1	$ 1	$ 1	$ 1

[1] Includes $(1) million of severance charges funded from pension plan assets, which were reclassified to Pension and other postretirement liabilities and $(1) million of currency translation impacts.

[2] The severance and exit costs reserves require the outlay of cash, while long-lived asset impairments and inventory write-downs represent non-cash items.