Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 23,108	$ 23,679
Increase (decrease ) goodwill, foreign currency translation	(533)	304
Increase in goodwill		576
Amount of reductions of goodwill relating to impairments	0	0
Gross amount of amortizable intangible assets	27,100	27,700
Increase in amortizable intangible assets		305
Accumulated amortization of intangible assets	21,300	19,700
Increase (decrease) in intangible assets due to foreign currency translation adjustments	$ (78)	44
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of products sold, excluding amortization of intangible assets
Estimated annual amortization expense, intangible assets, year one	$ 1,700
Estimated annual amortization expense, intangible assets, year two	1,500
Estimated annual amortization expense, intangible assets, year three	1,200
Estimated annual amortization expense, intangible assets, year four	668
Estimated annual amortization expense, intangible assets, year five	605
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination	784	787
Increase in in-process research and development assets	$ 35	$ 80
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]		Research and development
Minimum
Goodwill and Intangible Assets [Line Items]
Amortization period of intangible assets	2 years
Maximum
Goodwill and Intangible Assets [Line Items]
Amortization period of intangible assets	20 years
Established Pharmaceuticals
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 2,600
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	16,800
Impairment of intangible assets, finite-lived	207
Medical Devices | Operating Segments
Goodwill and Intangible Assets [Line Items]
Impairment of indefinite-lived intangible assets in-process research and development project	$ 39	$ 100