Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Original cost	$ 116,377		$ 116,377		$ 116,469
Less accumulated depreciation and amortization	(48,477)		(48,477)		(47,642)
Property, plant and equipment - net	67,900		67,900		68,827
Depreciation and amortization	$ 2,226	$ 2,266	$ 4,501	$ 4,575