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Property, Plant & Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT      
Property, plant, and equipment, excluding underlying asset - gross $ 32,911 $ 31,504  
Less: Accumulated depreciation, excluding underlying asset 22,968 21,726  
Property, plant, and equipment, excluding underlying asset 9,943 9,778 $ 10,359
Rental machines 265 523  
Less: Accumulated depreciation - rental machines 168 292  
Rental machines - net 97 232  
Property, plant and equipment - net (Note L) 10,040 10,010  
Land and land improvements      
PROPERTY, PLANT AND EQUIPMENT      
Property, plant, and equipment, excluding underlying asset - gross 381 365  
Buildings and building and leasehold improvements      
PROPERTY, PLANT AND EQUIPMENT      
Property, plant, and equipment, excluding underlying asset - gross 9,416 9,364  
Information technology equipment      
PROPERTY, PLANT AND EQUIPMENT      
Property, plant, and equipment, excluding underlying asset - gross 19,419 18,054  
Production, engineering, office and other equipment      
PROPERTY, PLANT AND EQUIPMENT      
Property, plant, and equipment, excluding underlying asset - gross $ 3,695 $ 3,721