Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net sales	$ 3,243	$ 3,615	$ 6,421	$ 7,295
Telecommunication Products [Member]
Net sales	1,066	1,313	2,191	2,511
Display Products [Member]
Net sales	725	759	1,334	1,665
Specialty Glass Products [Member]
Net sales	420	485	824	978
Environmental Substrate and Filter Products [Member]
Net sales	433	336	840	737
Life Science Products [Member]
Net sales	222	304	469	611
Polycrystalline Silicon [Member]
Net sales	258	306	535	588
Product and Service, Other [Member]
Net sales	$ 119	$ 112	$ 228	$ 205