Note 8 - Goodwill and Other Intangible Assets - Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 2,394	$ 2,421
Acquired goodwill		5
Foreign currency translation adjustment and other	(14)	(32)
Balance	2,380	2,394
Optical Communications [Member]
Balance	905	915
Acquired goodwill		4
Foreign currency translation adjustment and other	(1)	(14)
Balance	904	905
Display Technologies [Member]
Balance	121	125
Foreign currency translation adjustment and other	(2)	(4)
Balance	119	121
Specialty Materials [Member]
Balance	151	150
Acquired goodwill		1
Balance	151	151
Life Science Products [Member]
Balance	606	616
Foreign currency translation adjustment and other	1	(10)
Balance	607	606
Hemlock and Emerging Growth Businesses [Member]
Balance	611	615
Foreign currency translation adjustment and other	(12)	(4)
Balance	$ 599	$ 611