Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 23,383	$ 23,679
Decrease in goodwill due to foreign currency translation adjustments	294
Amount of reductions of goodwill relating to impairments	0
Gross amount of amortizable intangible assets	27,500	27,700
Accumulated amortization of intangible assets	20,000	19,700
Decrease in intangible assets due to foreign currency translation adjustments	38
Impairment charge	8
Estimated annual amortization expense, intangible assets, remainder of year	1,900
Estimated annual amortization expense, intangible assets, year one	1,700
Estimated annual amortization expense, intangible assets, year two	1,600
Estimated annual amortization expense, intangible assets, year three	1,300
Estimated annual amortization expense, intangible assets, year four	700
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination	787	$ 787
Established Pharmaceutical Products
Goodwill and Intangible Assets [Line Items]
Goodwill	2,700
Nutritionals
Goodwill and Intangible Assets [Line Items]
Goodwill	285
Diagnostics
Goodwill and Intangible Assets [Line Items]
Goodwill	3,500
Medical Devices
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 16,900