Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Goodwill and Intangible Assets [Line Items]
Goodwill		$ 23,277		$ 22,799
Increase in goodwill due to acquisition		590
Decrease in goodwill due to foreign currency translation adjustments		112
Amount of reductions of goodwill relating to impairments		0
Gross amount of amortizable intangible assets		27,500		27,200
Increase in amortizable intangible assets due to acquisition		305
Accumulated amortization of intangible assets		19,000		17,600
Decrease in intangible assets due to foreign currency translation adjustments		14
Estimated annual amortization expense, intangible assets, 2023		2,000
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
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination		832		$ 807
Increase in in-process R&D due to acquisition		80
Established Pharmaceutical Products
Goodwill and Intangible Assets [Line Items]
Goodwill		2,600
Nutritional Products
Goodwill and Intangible Assets [Line Items]
Goodwill		285
Diagnostic Products
Goodwill and Intangible Assets [Line Items]
Goodwill		3,500
Medical Devices
Goodwill and Intangible Assets [Line Items]
Goodwill		16,800
Impairment of indefinite-lived intangible assets	$ 111	$ 55	$ 111