v3.19.3.a.u2
Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill And Other Intangible Assets      
Amortization expense for definite-life intangible assets for the year $ 7,932 $ 8,347 $ 4,626
Estimated amortization expense in 2020 6,614    
Estimated amortization expense in 2021 5,683    
Estimated amortization expense in 2022 4,961    
Estimated amortization expense in 2023 4,299    
Estimated amortization expense in 2024 $ 3,644    
Finite Lived Intangible Assets [Line Items]      
Estimated economic useful life 21 years 6 months 21 years 6 months  
Intangible Assets $ 82,150 $ 79,365  
Trademarks and trade names [Member]      
Finite Lived Intangible Assets [Line Items]      
Estimated economic useful life 37 years 3 months 18 days 37 years 3 months 18 days  
Write-offs of fully amortized finite-lived intangible assets   $ 2,892  
Intangible Assets $ 18,359 $ 18,371  
Trademarks and trade names [Member] | SKY Brasil [Member]      
Finite Lived Intangible Assets [Line Items]      
Goodwill impairment $ 145    
Customer Lists And Relationships [Member]      
Finite Lived Intangible Assets [Line Items]      
Estimated economic useful life 9 years 1 month 6 days 9 years 1 month 6 days  
Write-offs of fully amortized finite-lived intangible assets   $ 2,890  
Intangible Assets $ 20,304 $ 20,516  
License [Member] | Mexico [Member]      
Finite Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Amortization Method straight-line basis    
Finite-Lived Intangible Assets, Remaining Amortization Period 20 years    
Estimated economic useful life 25 years    
Intangible Assets $ 1,561