Note 19 - Restructuring Costs and Other - Restructuring Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Restructuring Cost And Reserve [Line Items]
Beginning Balance		$ 8	$ 10
Charges		16	17
Utilization/cash payments		(9)	(14)
Other adjustments & reclasses	[1]	(3)	(5)
Ending Balance		12	8
Severance Reserve [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	[2]	6	6
Charges	[2]	16	17
Utilization/cash payments	[2]	(8)	(12)
Other adjustments & reclasses	[1],[2]	(3)	(5)
Ending Balance	[2]	11	6
Exit Costs Reserve [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance	[2]	2	4
Utilization/cash payments	[2]	(1)	(2)
Ending Balance	[2]	$ 1	$ 2

[1] The $3 million and $5 million represent severance charges funded from pension plan assets, which were reclassified to Pension and other postretirement liabilities.

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