Note 21 - Other Post Retirement Benefit Cost from Continuing Operations (Details) - Other Postretirement Benefits Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Components of net postretirement benefit cost:
Interest cost	$ 2	$ 2
Amortization of:
Net actuarial loss	(1)
Net pension income	$ 1	$ 2