Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets
Goodwill	$ 22,927	$ 23,195
Decrease in goodwill due to foreign currency translation adjustments	268
Amount of reductions of goodwill relating to impairments	0
Established Pharmaceutical Products
Goodwill and Intangible Assets
Goodwill	2,800
Nutritional Products
Goodwill and Intangible Assets
Goodwill	286
Diagnostic Products
Goodwill and Intangible Assets
Goodwill	3,600
Medical Devices
Goodwill and Intangible Assets
Goodwill	$ 16,100

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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