Property, Plant And Equipment (Property, Plant And Equipment, Net) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Property, Plant And Equipment [Abstract]
Property, plant and equipment	$ 26,124	$ 25,541
Less: Accumulated depreciation	(11,749)	(10,639)
Property, plant and equipment, net	$ 14,375	$ 14,902