Acquisitions, Dispositions and Plant Closures (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Gain (loss) on disposition of businesses and assets, net		$ 5	$ 14	$ (505)
One-time Termination Benefits
Restructuring Cost and Reserve [Line Items]
Additions		68	107	52
One-time Termination Benefits | Lanaken, Belgium
Restructuring Cost and Reserve [Line Items]
Additions		7	0	0
Uentrop, Germany | Engineered Materials
Restructuring Cost and Reserve [Line Items]
Additions	[1]	0	16	0
Accelerated depreciation expense	[1],[2]	0	36	14
Gain (loss) on disposition of businesses and assets, net	[1],[3]	0	0	4
Plant Shutdown Costs	[1]	0	52	18
Mechelen, Belgium | Engineered Materials
Restructuring Cost and Reserve [Line Items]
Additions	[4]	3	55	0
Accelerated depreciation expense	[2],[4]	0	35	0
Plant Shutdown Costs	[4]	3	90	0
Lanaken, Belgium | Acetyl Chain
Restructuring Cost and Reserve [Line Items]
Additions	[5]	7	0	0
Accelerated depreciation expense	[2],[5]	11	0	0
Plant Shutdown Costs	[5]	18	$ 0	$ 0
Restructuring and Related Cost, Expected Cost		$ 140

[1] In October 2023, the Company announced the intended closure of its Polyamide 66 ("PA66") and certain High-Performance Nylon ("HPN") polymerization units at its facility in Uentrop, Germany to optimize production costs across its global network. These operations are included in the Company's Engineered Materials segment. The Company fully ceased operation of the PA66 polymerization unit and certain HPN polymerization units during the year ended December 31, 2024.

[2] Included in Cost of sales in the consolidated statements of operations.

[3] Included in Gain (loss) on disposition of businesses and assets, net in the consolidated statements of operations.

[4] In February 2024, the Company announced the intended closure of its facility in Mechelen, Belgium to optimize production costs across its global network. This operation is included in the Company's Engineered Materials segment. The Company fully ceased operations during the year ended December 31, 2024.

[5] On October 28, 2025, the Company announced the intended closure of its facility in Lanaken, Belgium to streamline the Company's production costs across its global network. This operation is included in the Company's Acetyl Chain segment. The Company intends to permanently cease all manufacturing operations during the second half of 2026. The Company expects to incur additional exit and shutdown costs related to the intended closure of its facility in Lanaken, Belgium of $140 million, including employee termination costs, through 2027.