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Intangible Assets and Goodwill - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 27, 2020
Sep. 29, 2019
Sep. 27, 2020
Sep. 29, 2019
Mar. 29, 2020
Dec. 29, 2019
Finite-Lived Intangible Assets [Line Items]            
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 12,695   $ 12,695     $ 11,569
Intangible Assets and Goodwill (Textuals)            
Amortization expense of amortizable intangible assets 1,200 $ 1,100 $ 3,400 $ 3,300    
Patents And Trademarks            
Intangible Assets and Goodwill (Textuals)            
Finite-Lived Intangible Assets, Weighted-Average Useful Life     12 years      
Customer relationships and other intangible assets            
Intangible Assets and Goodwill (Textuals)            
Finite-Lived Intangible Assets, Weighted-Average Useful Life     21 years      
Purchased In-Process Research And Development            
Finite-Lived Intangible Assets [Line Items]            
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 5,700   $ 5,700     $ 4,647
Purchased In-Process Research And Development | bermekimab            
Finite-Lived Intangible Assets [Line Items]            
Indefinite-lived Intangible Assets (Excluding Goodwill)         $ 800  
Purchased In-Process Research And Development | Verb Surgical Inc.            
Finite-Lived Intangible Assets [Line Items]            
Indefinite-lived Intangible Assets (Excluding Goodwill)         $ 400