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Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Abstract]    
Land $ 527 $ 546
Buildings and land improvements 14,288 14,109
Machinery and equipment 15,723 15,221
Construction in progress 1,306 1,337
Gross property, plant and equipment 31,844 31,213
Less accumulated depreciation (19,342) (18,568)
Total $ 12,502 $ 12,645