v3.26.1
Segment Information - Schedule of Business Segments (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]          
Net sales $ 2,752 $ 2,532 $ 5,089 $ 4,921  
Cost of sales (2,134) (1,998) (4,003) (3,913)  
Gross profit 618 534 1,086 1,008  
Selling, general and administrative expenses (251) (214) (477) (445)  
Amortization (39) (42) (79) (82)  
Research and development expenses (29) (31) (57) (62)  
Other (charges) gains, net (Note 18) (31) (20) (51) (51)  
Gain (loss) on disposition of business and assets, net (2) (2) 46 1  
Other segment items(2) 10 [1] 6 [1] 22 [2] 27 [2]  
Operating profit (loss) 276 231 490 396  
Depreciation and amortization 244 190 445 370  
Equity in net earnings (loss) of affiliates 11 29 46 51  
Capital expenditures 67 [3] 84 [3] 111 [4] 162 [4]  
Goodwill and intangible assets, net 7,226   7,226   $ 7,355
Total assets 21,408   21,408   21,695
Increase (decrease) in accrued capital expenditures 5 (9) (17) (33)  
Engineered Materials          
Segment Reporting Information [Line Items]          
Net sales 1,446 1,442 2,771 2,729  
Acetyl Chain          
Segment Reporting Information [Line Items]          
Net sales [5] 1,306 1,090 2,318 2,192  
Operating Segments | Engineered Materials          
Segment Reporting Information [Line Items]          
Net sales 1,446 1,442 2,771 2,729  
Cost of sales (1,129) (1,098) (2,122) (2,111)  
Gross profit 317 344 649 618  
Selling, general and administrative expenses (94) (101) (189) (208)  
Amortization (39) (41) (78) (81)  
Research and development expenses (19) (20) (37) (42)  
Other (charges) gains, net (Note 18) (8) (16) (15) (31)  
Gain (loss) on disposition of business and assets, net (1) (2) 47 2  
Other segment items(2) 0 0 [1] 0 [2] 0 [2]  
Operating profit (loss) 156 164 377 258  
Depreciation and amortization 144 114 251 223  
Equity in net earnings (loss) of affiliates 6 24 37 40  
Capital expenditures 36 46 59 85  
Goodwill and intangible assets, net 6,796   6,796   6,917
Total assets 13,534   13,534   13,971
Operating Segments | Acetyl Chain          
Segment Reporting Information [Line Items]          
Net sales 1,329 1,115 2,365 2,231  
Cost of sales (1,032) (925) (1,927) (1,840)  
Gross profit 297 190 438 391  
Selling, general and administrative expenses (30) (23) (56) (51)  
Amortization 0 (1) (1) (1)  
Research and development expenses (9) (11) (19) (20)  
Other (charges) gains, net (Note 18) (21) (1) (30) (4)  
Gain (loss) on disposition of business and assets, net 0 (1) 0 (1)  
Other segment items(2) 0 0 [1] 0 [2] 0 [2]  
Operating profit (loss) 237 153 332 314  
Depreciation and amortization 86 64 167 125  
Equity in net earnings (loss) of affiliates 1 2 3 5  
Capital expenditures 29 32 49 62  
Goodwill and intangible assets, net 430   430   438
Total assets 5,382   5,382   5,302
Segment Reporting, Reconciling Item, Corporate Nonsegment | Other          
Segment Reporting Information [Line Items]          
Net sales 0 0 0 0  
Cost of sales 4 0 (1) (1)  
Gross profit 4 0 (1) (1)  
Selling, general and administrative expenses (127) (90) (232) (186)  
Amortization 0 0 0 0  
Research and development expenses (1) 0 (1) 0  
Other (charges) gains, net (Note 18) (2) (3) (6) (16)  
Gain (loss) on disposition of business and assets, net (1) 1 (1) 0  
Other segment items(2) 10 [1] 6 [1] 22 [2] 27 [2]  
Operating profit (loss) (117) (86) (219) (176)  
Depreciation and amortization 14 12 27 22  
Equity in net earnings (loss) of affiliates 4 3 6 6  
Capital expenditures 2 6 3 15  
Goodwill and intangible assets, net 0   0   0
Total assets 2,492   2,492   2,422
Eliminations          
Segment Reporting Information [Line Items]          
Net sales (23) [6] (25) [6] (47) [7] (39) [7]  
Cost of sales 23 25 47 39  
Gross profit 0 0 0 0  
Selling, general and administrative expenses 0 0 0 0  
Amortization 0 0 0 0  
Research and development expenses 0 0 0 0  
Other (charges) gains, net (Note 18) 0 0 0 0  
Gain (loss) on disposition of business and assets, net 0 0 0 0  
Other segment items(2) 0 [1] 0 [1] 0 [2] 0 [2]  
Operating profit (loss) 0 0 0 0  
Depreciation and amortization 0 0 0 0  
Equity in net earnings (loss) of affiliates 0 0 0 0  
Capital expenditures 0 0 0 0  
Goodwill and intangible assets, net 0   0   0
Total assets 0   0   $ 0
Eliminations | Acetyl Chain          
Segment Reporting Information [Line Items]          
Net sales $ 23 $ 25 $ 47 $ 39  
[1] Includes Foreign exchange gain (loss), net.
[2] Includes Foreign exchange gain (loss), net.
[3] Includes an increase in accrued capital expenditures of $5 million and a decrease of $9 million for the three months ended June 30, 2026 and 2025, respectively.
[4] Includes a decrease in accrued capital expenditures of $17 million and $33 million for the six months ended June 30, 2026 and 2025, respectively.
[5] Excludes intersegment sales of $23 million and $25 million for the three months ended June 30, 2026 and 2025, respectively. Excludes intersegment sales of $47 million and $39 million for the six months ended June 30, 2026 and 2025, respectively.
[6] Includes intersegment sales primarily related to the Acetyl Chain.
[7] Includes intersegment sales primarily related to the Acetyl Chain.