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Divestitures (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
Divestitures (Details) - USD ($) $ in Millions	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Oct. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business, net of cash sold and working capital adjustments				$ (4)	$ 0
Net loss on sale of business, excluding transaction costs	$ 0		$ 0	3	$ 22
Medicated Feed Additives \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Products and assets to sell agreement amount						$ 299
Sale proceeds		$ 303
Net of cash sold amount				11
Proceeds from sale of business, net of cash sold and working capital adjustments		292
Net loss on sale of business		$ 25
Payment, net of proceeds received				4
Net loss on sale of business, excluding transaction costs				$ 3