Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Land	$ 535	$ 536
Buildings and land improvements	13,796	12,397
Machinery and equipment	13,569	13,187
Construction in progress	1,790	2,242
Gross property, plant and equipment	29,690	28,362
Less accumulated depreciation	(16,883)	(16,286)
Total	$ 12,807	$ 12,076