Note 4 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended					6 Months Ended
		Jun. 30, 2021		Jun. 30, 2020		Mar. 31, 2020	Jun. 30, 2021		Jun. 30, 2020
Net sales		$ 3,501		$ 2,561			$ 6,791		$ 4,952
Impact of foreign currency movements	[1]	3		27			(24)		60
Cumulative adjustment related to customer contract			[2]		[2]	$ 105		[2]	105	[2]
Net sales of reportable segments and All Other		3,504		2,588			6,767		5,117
Display Products [Member]
Net sales		934		744			1,822		1,377
Telecommunication Products [Member]
Net sales		1,075		887			2,012		1,678
Specialty Glass Products [Member]
Net sales		483		417			934		769
Environmental Substrate and Filter Products [Member]
Net sales		409		215			851		522
Life Science Products [Member]
Net sales		312		236			613		487
Product and Service, Other [Member]
Net sales	[3]	$ 288		$ 62			$ 559		$ 119

[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.