Acquisitions, Divestitures and Other Arrangements - Amounts Recognized for Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Aug. 01, 2023	Jan. 03, 2023
Business Acquisition [Line Items]
Goodwill	$ 4,625	$ 5,094
NutriQuest, LLC
Business Acquisition [Line Items]
Inventories				$ 3
Total identifiable assets				56
Goodwill				3
Total consideration transferred				59
NutriQuest, LLC | Marketed products
Business Acquisition [Line Items]
Definite-lived intangible assets				29
NutriQuest, LLC | Acquired in-process research and development (IPR&D)
Business Acquisition [Line Items]
Definite-lived intangible assets				9
NutriQuest, LLC | Other intangible assets
Business Acquisition [Line Items]
Definite-lived intangible assets				$ 15
NutriQuest Brazil
Business Acquisition [Line Items]
Inventories			$ 3
Definite-lived intangible assets			15
Total identifiable assets			18
Goodwill			1
Total consideration transferred			$ 19