Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net sales	$ 3,173	$ 3,488	$ 9,594	$ 10,783
Telecommunication Products [Member]
Net sales	918	1,317	3,109	3,828
Display Products [Member]
Net sales	727	558	2,061	2,223
Specialty Glass Products [Member]
Net sales	560	516	1,384	1,494
Environmental Substrate and Filter Products [Member]
Net sales	420	393	1,260	1,130
Life Science Products [Member]
Net sales	221	297	690	908
Polycrystalline Silicon [Member]
Net sales	230	288	765	877
Product and Service, Other [Member]
Net sales	$ 97	$ 119	$ 325	$ 323