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Reportable Segments - Schedule of Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]          
Research, development and engineering expenses $ 280 $ 294 $ 826 $ 814  
Depreciation     913 924  
Income tax provision 80 3 219 124  
Segment net income (loss) $ 430 $ (117) $ 1,056 $ 196  
Effective tax rate 21.00% 21.00% 21.00% 21.00%  
Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales $ 4,272 $ 3,733 $ 11,996 $ 10,595  
Research, development and engineering expenses 233 248 702 686  
Depreciation 304 308 903 918  
Other segment items 2,787 2,400 7,858 6,929  
Income tax provision 207 167 551 444  
Segment net income (loss) 741 610 1,982 1,618  
Investment in affiliated companies, at equity 300   300   $ 290
Segment assets 19,520   19,520   17,626
Capital expenditures 362 184 924 583  
Optical Communications | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 1,652 1,246 4,573 3,289  
Research, development and engineering expenses 75 71 228 202  
Depreciation 66 69 200 201  
Other segment items 1,131 882 3,187 2,350  
Income tax provision 85 49 215 118  
Segment net income (loss) 295 175 743 418  
Investment in affiliated companies, at equity 4   4   4
Segment assets 3,958   3,958   3,506
Capital expenditures 129 49 313 133  
Display | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 939 1,015 2,742 2,901  
Research, development and engineering expenses 23 29 72 83  
Depreciation 105 110 315 336  
Other segment items 495 516 1,426 1,542  
Income tax provision 66 75 193 196  
Segment net income (loss) 250 285 736 744  
Investment in affiliated companies, at equity 100   100   90
Segment assets 6,750   6,750   6,596
Capital expenditures 95 45 206 179  
Specialty Materials | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 621 548 1,667 1,503  
Research, development and engineering expenses 71 69 206 186  
Depreciation 37 39 111 115  
Other segment items 371 348 1,011 975  
Income tax provision 29 20 71 48  
Segment net income (loss) 113 72 268 179  
Investment in affiliated companies, at equity 17   17   15
Segment assets 2,643   2,643   2,489
Capital expenditures 55 13 131 73  
Automotive | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 454 430 1,354 1,400  
Research, development and engineering expenses 38 43 108 122  
Depreciation 40 44 122 131  
Other segment items 290 278 852 893  
Income tax provision 18 14 57 54  
Segment net income (loss) 68 51 215 200  
Investment in affiliated companies, at equity    
Segment assets 2,443   2,443   2,366
Capital expenditures 29 20 71 41  
Life Sciences | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 242 244 726 729  
Research, development and engineering expenses 6 5 19 17  
Depreciation 15 17 46 51  
Other segment items 200 203 601 604  
Income tax provision 5 4 13 12  
Segment net income (loss) 16 15 47 45  
Investment in affiliated companies, at equity    
Segment assets 799   799   800
Capital expenditures 5 2 11 10  
Hemlock and Emerging Growth Businesses | Operating Segments          
Segment Reporting Information [Line Items]          
Segment net sales 364 250 934 773  
Research, development and engineering expenses 20 31 69 76  
Depreciation 41 29 109 84  
Other segment items 300 173 781 565  
Income tax provision 4 5 2 16  
Segment net income (loss) (1) 12 (27) 32  
Investment in affiliated companies, at equity 179   179   181
Segment assets 2,927   2,927   $ 1,869
Capital expenditures $ 49 $ 55 $ 192 $ 147