Note 18 - Restructuring Costs and Other - Restructuring Liabilities (Details) (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring And Related Activities [Abstract]
Other adjustments & reclasses	[1]	$ 2	$ 3	$ 3
Severance Costs		$ 2	$ 3	$ 3

[1] The $2 million in 2021 and the $3 million in both 2020 and 2019 represented severance charges funded from pension plan assets, which were reclassified to Pension and other postretirement liabilities.