Acquisitions, Dispositions and Plant Closures Plant Closures - Narrative (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
	Aug. 31, 2026	Feb. 02, 2026	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Business Combination [Line Items]
Gain (loss) on disposition of business and assets, net			$ (4)	$ (3)	$ 42	$ (2)
Proceeds from sale of businesses and assets, net					$ (500)	$ (7)
Mitsui & Co. Ltd. | Nutrinova Joint Venture
Business Combination [Line Items]
Equity Method Investment, Ownership Percentage	19.00%
Celanese Corporations | Nutrinova Joint Venture
Business Combination [Line Items]
Equity Method Investment, Ownership Percentage			11.00%		11.00%
Proceeds from Sale of Equity Method Investments	$ 152
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Micromax
Business Combination [Line Items]
Proceeds from divestiture of businesses		$ 493
Gain (loss) on disposition of business and assets, net					$ 50