Acquisitions and Divestitures (Details) - USD ($) $ in Millions			12 Months Ended
	Aug. 03, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023
Business Acquisition [Line Items]
Proceeds from sale of businesses, net of cash sold			$ 96	$ 0	$ 0
Gain (Loss) on Disposition of Business			101	$ 0	$ 0
Gain (Loss) On Disposition Of Business, Remeasurement Of Retained Noncontrolling Investment			24
Pumpkin Insurance Services
Business Acquisition [Line Items]
Proceeds from sale of businesses, net of cash sold			93
Amount to be received under agreement			99
Cash Divested from Deconsolidation			6
Gain (Loss) on Disposition of Business			101
Jurox
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired						100.00%
Business Combination, Consideration Transferred		$ 240
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
Business Combination, Price of Acquisition, Expected		226
Payments to Acquire Businesses, Net of Cash Acquired		$ 215
PetMedix Ltd.
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	$ 100
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