Note 5 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Net sales			$ 14,082	$ 11,303		$ 11,503
Impact of foreign currency movements	[1]		38	44		153
Cumulative adjustment related to customer contract		$ (105)		105	[2]
Net sales of reportable segments and All Other			14,120	11,452		11,656
Display Products [Member]
Net sales			3,666	3,077		3,180
Telecommunication Products [Member]
Net sales			4,349	3,563		4,064
Specialty Glass Products [Member]
Net sales			2,008	1,884		1,594
Environmental Substrate and Filter Products [Member]
Net sales			1,584	1,333		1,440
Life Science Products [Member]
Net sales			1,232	981		995
Product and Service, Other [Member]
Net sales	[3]		$ 1,243	$ 465		$ 230

[1] This amount primarily represents the impact of foreign currency adjustments in the Display Technologies segment.

[2] 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.

[3] The Company obtained a controlling interest in HSG during the third quarter of 2020 and has consolidated results in "All Other" as of September 9, 2020.