Acquisitions and Divestitures (Details) - USD ($) $ in Millions				12 Months Ended
	Oct. 31, 2024	Aug. 03, 2023	Sep. 30, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2024
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Business				$ (23)	$ 101	$ 0
Proceeds from sale of businesses, net of cash sold				293	$ 96	$ 0
Gain (Loss) On Disposition Of Business, Remeasurement Of Retained Noncontrolling Investment				24
Gain (Loss) On Disposition Of Asset, Goodwill Allocation				12
Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Disposal Group, Including Discontinued Operation, Inventory, Current	$ 154
Disposal Group, Including Discontinued Operation, Other Assets, Current	3
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent	108
Disposal Group, Including Discontinued Operation, Operating Lease, Right-Of-Use Asset, Noncurrent	2
Disposal Group, Including Discontinued Operation, Goodwill, Noncurrent	12
Disposal Group, Including Discontinued Operation, Intangible Assets, Noncurrent	26
Disposal Group, Including Discontinued Operation, Deferred Tax Assets	2
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent	9
Disposal Group, Including Discontinued Operation, Assets	316
Disposal Group, Including Discontinued Operation, Accounts Payable, Current	3
Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current	3
Disposal Group, Including Discontinued Operation, Employee Related, Current	2
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent	8
Disposal Group, Including Discontinued Operation, Liabilities	16
Pumpkin Insurance Services
Business Acquisition [Line Items]
Amount to be received under agreement				99
Cash Divested from Deconsolidation				6
Gain (Loss) on Disposition of Business				101
Proceeds from sale of businesses, net of cash sold				93
Medicated feed additives
Business Acquisition [Line Items]
Divestiture Of Business, Price Of Divestiture, Expected				309
Divestiture Of Business, Contingent Consideration Adjustments				6
Amount to be received under agreement				303
Cash Divested from Deconsolidation				11
Gain (Loss) on Disposition of Business				(25)
Proceeds from sale of businesses, net of cash sold	$ 292
Jurox
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired							100.00%
Payments to Acquire Businesses, Net of Cash Acquired			$ 215
Business Combination, Consideration Transferred			240
Business Combination, Price of Acquisition, Expected			226
Cash paid to shareholders			240
Business Combination, Consideration Transferred, Outstanding				$ 5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents			20
Accounts receivable			8
Inventories			21
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other			1
Property, plant and equipment			25
Identifiable intangible assets			135
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable			2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other			12
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other			1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net			202
Goodwill			$ 38
PetMedix Ltd.
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Payments to Acquire Businesses, Net of Cash Acquired		$ 111
Cash Acquired from Acquisition		19
Business Combination, Consideration Transferred, Cash Withheld For Post-Closing Adjustments		5
Business Combination, Consideration Transferred		$ 100