Note 9 - Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 2,421	$ 2,460
Foreign currency translation adjustment and other	(32)	(39)
Acquired goodwill	5
Balance	2,394	2,421
Optical Communications [Member]
Balance	915	943
Foreign currency translation adjustment and other	(14)	(28)
Acquired goodwill	4
Balance	905	915
Display Technologies [Member]
Balance	125	132
Foreign currency translation adjustment and other	(4)	(7)
Balance	121	125
Specialty Materials [Member]
Balance	150	150
Acquired goodwill	1
Balance	151	150
Life Science Products [Member]
Balance	616	618
Foreign currency translation adjustment and other	(10)	(2)
Balance	606	616
Hemlock and Emerging Growth Businesses [Member]
Balance	615	617
Foreign currency translation adjustment and other	(4)	(2)
Acquired goodwill
Balance	$ 611	$ 615