v3.19.3.a.u2
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets      
Gross amount of amortizable intangible assets $ 27,600 $ 25,700  
Accumulated amortization of intangible assets 11,900 10,400  
Decrease in intangible assets due to foreign currency translation adjustments (71) (281)  
Change in amortizable intangible assets due to sale of businesses   280  
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) (71) (281)  
Indefinite-lived intangible assets related to in-process R&D acquired in a business combination 1,300 $ 3,600  
Estimated annual amortization expense, intangible assets, 2020 2,100    
Estimated annual amortization expense, intangible assets, 2021 2,000    
Estimated annual amortization expense, intangible assets, 2022 2,000    
Estimated annual amortization expense, intangible assets, 2023 2,000    
Estimated annual amortization expense, intangible assets, 2024 $ 1,900    
Medical Devices      
Goodwill and Intangible Assets      
Impairment of indefinite-lived intangible assets in-process research and development project     $ 53
Minimum      
Goodwill and Intangible Assets      
Amortization period of intangible assets 2 years    
Maximum      
Goodwill and Intangible Assets      
Amortization period of intangible assets 20 years