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Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Abstract]    
Land $ 536 $ 560
Buildings and land improvements 12,397 11,767
Machinery and equipment 13,187 12,867
Construction in progress 2,242 1,502
Gross property, plant and equipment 28,362 26,696
Less accumulated depreciation (16,286) (15,689)
Total $ 12,076 $ 11,007