Note 20 - Reportable Segments (Details Textual) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019	Sep. 09, 2020
Number of Material Formations		150
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%		21.00%
Revenue, Cumulative Adjustments	$ (105)		$ 105	[1]
Investment Liabilities Noncurrent						$ 270

[1] Amount represents the negative impact of a cumulative adjustment to reduce revenue by $105 million recorded during the first quarter of 2020. The adjustment was associated with a previously recorded commercial benefit asset, reflected as a prepayment, to a customer with a long-term supply agreement that substantially exited its production of LCD panels.