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Segments of Business and Geographic Areas - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 29, 2020
Mar. 31, 2019
Sales by geographic area    
Sales $ 20,691 $ 20,021
Percentage Change In Sales By Geographic Area 3.30%  
United States    
Sales by geographic area    
Sales $ 10,699 10,129
Percentage Change In Sales By Geographic Area 5.60%  
Europe    
Sales by geographic area    
Sales $ 4,827 4,609
Percentage Change In Sales By Geographic Area 4.70%  
Western Hemisphere, excluding U.S.    
Sales by geographic area    
Sales $ 1,502 1,503
Percentage Change In Sales By Geographic Area (0.10%)  
Asia-Pacific, Africa    
Sales by geographic area    
Sales $ 3,663 $ 3,780
Percentage Change In Sales By Geographic Area (3.10%)