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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Goodwill and Intangible Assets    
Goodwill $ 23,231 $ 23,744
Increase (decrease) in goodwill due to foreign currency translation adjustments (532) 550
Amount of reductions of goodwill relating to impairments 0 $ 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 3,700  
Medical Devices    
Goodwill and Intangible Assets    
Goodwill $ 16,400