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Fixed Assets (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Fixed Assets [Text Block]
(dollars in millions)Estimated
Useful Lives
20192018
Land$447  $425  
Buildings and improvements
12-40 years
6,673  6,486  
Machinery, tools and equipment
3-20 years
16,353  15,119  
Other, including assets under construction 2,213  2,054  
25,686  24,084  
Accumulated depreciation (12,931) (11,787) 
$12,755  $12,297