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Acquisitions, Dispositions and Plant Closures (Narrative) (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Feb. 02, 2026	Sep. 30, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Business Combination [Line Items]
Gain (loss) on disposition of businesses and assets, net			$ (5)	$ (14)	$ 505
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Micromax \| Subsequent Event [Member]
Business Combination [Line Items]
Proceeds from Divestiture of Businesses	$ 492
Nutrinova Joint Venture
Business Combination [Line Items]
Gain (loss) on disposition of businesses and assets, net					$ 515
Celanese Corporation \| Nutrinova Joint Venture
Business Combination [Line Items]
Equity Method Investment, Ownership Percentage		30.00%
Mitsui & Co. Ltd. \| Nutrinova Joint Venture
Business Combination [Line Items]
Equity Method Investment, Ownership Percentage		70.00%
Proceeds from sale of businesses and assets, net		$ 503