Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 23,658	$ 23,679
Increase in goodwill due to foreign currency translation adjustments	18
Decrease in goodwill due to purchase accounting finalization for business acquisitions	39
Amount of reductions of goodwill relating to impairments	0
Gross amount of amortizable intangible assets	27,700	27,700
Accumulated amortization of intangible assets	21,100	19,700
Decrease in intangible assets due to foreign currency translation adjustments	(9)
Estimated annual amortization expense, intangible assets, 2024	1,900
Estimated annual amortization expense, intangible assets, 2025	1,700
Estimated annual amortization expense, intangible assets, 2026	1,600
Estimated annual amortization expense, intangible assets, 2027	1,300
Estimated annual amortization expense, intangible assets, 2028	700
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination	798	$ 787
Increase in in-process R&D due to acquisition	35
Established Pharmaceutical Products
Goodwill and Intangible Assets [Line Items]
Goodwill	2,700
Nutritional Products
Goodwill and Intangible Assets [Line Items]
Goodwill	285
Diagnostic Products
Goodwill and Intangible Assets [Line Items]
Goodwill	3,600
Medical Devices
Goodwill and Intangible Assets [Line Items]
Goodwill	17,100
Impairment charge	51
Impairment of indefinite-lived intangible assets	$ 25