Property, Plant And Equipment (Property, Plant And Equipment, Net) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Property, Plant And Equipment [Abstract]
Property, plant and equipment	$ 25,857	$ 25,541
Less: Accumulated depreciation	(11,375)	(10,639)
Property, plant and equipment, net	$ 14,482	$ 14,902