Note 4 - Revenue (Details Textual) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Revenue, Cumulative Adjustments	[1]		$ 105
Contract with Customer, Liability, Total		$ 1,300		$ 1,400
Increase (Decrease) in Contract with Customer, Liability		93	$ 41
Contract with Customer, Liability, Noncurrent		1,058		1,148
Contract with Customer, Liability, Current		217		211
HSG [Member]
Contract with Customer, Liability, Total		1,000		1,000
Contract with Customer, Liability, Noncurrent		834		872
Contract with Customer, Liability, Current		$ 157		$ 152
Maximum [Member]
Long Term Supply, Commitment Period (Year)		10 years

[1] Amount represents the negative impact of a cumulative adjustment to reduce revenue in the amount of $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 exited its production of LCD panels.