Note 19 - Summary of Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Loss from continuing operations	$ (445)			$ (10)			$ (561)	$ (28)
Less: Series A convertible preferred stock cash dividend	(2)	$ (3)	$ (3)	(2)	$ (3)	$ (3)	(8)	(8)
Less: Series A convertible preferred stock deemed dividend	(3)	$ (2)	$ (2)	(3)	$ (2)	$ (2)	(7)	(7)
Loss from continuing operations available to common shareholders - basic and diluted	(450)			(15)			(576)	(43)
Net (loss) income	(445)			(5)			(561)	178
Net (loss) income available to common shareholders - basic and diluted	$ (450)			$ (10)			$ (576)	$ 163
Weighted average shares — basic and diluted	64.8			43.0			50.8	43.0