Note 20 - Amounts Recognized in the Consolidated Statement of Financial Position (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]
Pension and other postretirement liabilities	$ (382)	$ (406)
Other Postretirement Benefits Plan [Member]
Amounts Recognized In Consolidated Statement Of Financial Position [Line Items]
Other current liabilities	(3)	(3)
Pension and other postretirement liabilities	(53)	(60)
Other benefit plan liabilities	$ (56)	$ (63)