Reportable Segments - Segment information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Research, development and engineering expenses	$ 270	$ 258
Depreciation	291	307
Income tax provision (benefit)	55	71
Segment net income (loss)	$ 157	$ 209
Effective tax rate	21.00%	21.00%
Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	$ 3,679	$ 3,258
Research, development and engineering expenses	236	216
Depreciation	289	305
Other segment items	2,409	2,159
Income tax provision (benefit)	162	125
Segment net income (loss)	583	453
Investment in affiliated companies, at equity	299	301
Segment assets	17,973	18,436
Capital expenditures	239	186
Optical Communications | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	1,355	930
Research, development and engineering expenses	77	65
Depreciation	65	66
Other segment items	954	671
Income tax provision (benefit)	58	28
Segment net income (loss)	201	100
Investment in affiliated companies, at equity	5	4
Segment assets	3,768	3,326
Capital expenditures	97	36
Display | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	905	872
Research, development and engineering expenses	25	26
Depreciation	102	116
Other segment items	471	476
Income tax provision (benefit)	64	53
Segment net income (loss)	243	201
Investment in affiliated companies, at equity	91	98
Segment assets	6,613	7,616
Capital expenditures	46	73
Specialty Materials | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	501	454
Research, development and engineering expenses	67	60
Depreciation	35	36
Other segment items	305	303
Income tax provision (benefit)	20	11
Segment net income (loss)	74	44
Investment in affiliated companies, at equity	17	15
Segment assets	2,506	2,514
Capital expenditures	31	33
Automotive | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	440	491
Research, development and engineering expenses	35	38
Depreciation	41	43
Other segment items	278	311
Income tax provision (benefit)	18	21
Segment net income (loss)	68	78
Investment in affiliated companies, at equity	0	0
Segment assets	2,412	2,513
Capital expenditures	12	9
Life Sciences | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	234	236
Research, development and engineering expenses	6	6
Depreciation	16	17
Other segment items	195	196
Income tax provision (benefit)	4	4
Segment net income (loss)	13	13
Investment in affiliated companies, at equity	0	3
Segment assets	767	787
Capital expenditures	3	5
Hemlock and Emerging Growth Businesses | Operating Segments
Segment Reporting Information [Line Items]
Segment net sales	244	275
Research, development and engineering expenses	26	21
Depreciation	30	27
Other segment items	206	202
Income tax provision (benefit)	(2)	8
Segment net income (loss)	(16)	17
Investment in affiliated companies, at equity	186	181
Segment assets	1,907	1,680
Capital expenditures	$ 50	$ 30