Note 4 - Revenue (Details Textual) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020		Dec. 31, 2020
Revenue, Cumulative Adjustments			$ (105)		$ 105	[1]
Contract with Customer, Liability, Total	$ 1,300			$ 1,300			$ 1,400
Increase (Decrease) in Contract with Customer, Liability	59	$ 34		182	$ 107
Contract with Customer, Liability, Noncurrent	1,095			1,095			1,148
Contract with Customer, Liability, Current	224			224			211
Contract With Customer Liability, Deferred Revenue, Noncurrent	792			792			872
Contract With Customer Liability, Deferred Revenue, Current	140			140			152
HSG [Member]
Contract with Customer, Liability, Total	932			932			1,000
Contract With Customer Liability, Deferred Revenue, Noncurrent	792			792			872
Contract With Customer Liability, Deferred Revenue, Current	$ 140			$ 140			$ 152
Maximum [Member]
Long Term Supply, Commitment Period (Year)				10 years

[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.