Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net sales		$ 3,615	$ 3,501	$ 7,295	$ 6,791
Impact of foreign currency movements	[1]	147	3	211	(24)
Net sales of reportable segments and Hemlock and Emerging Growth Businesses		3,762	3,504	7,506	6,767
Telecommunication Products [Member]
Net sales		1,313	1,075	2,511	2,012
Display Products [Member]
Net sales		759	934	1,665	1,822
Specialty Glass Products [Member]
Net sales		485	483	978	934
Environmental Substrate and Filter Products [Member]
Net sales		336	409	737	851
Life Science Products [Member]
Net sales		304	312	611	613
Product and Service, Other [Member]
Net sales		$ 418	$ 288	$ 793	$ 559

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