Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2014

Property, Plant and Equipment, Net [Abstract]

Schedule of Public Utility Property, Plant, and Equipment [Table Text Block]

Property, plant and equipment, net consists of the following (in millions):

		As of
		March 31,			December 31,
	Depreciable Life	2014			2013
Property, plant and equipment in service	5-75 years	$	24,948		$	24,868
Accumulated depreciation and amortization		(7,806		)	(7,686		)
Net property, plant and equipment in service		17,142			17,182
Construction work-in-progress		1,424			1,325
Total property, plant and equipment, net		$	18,566		$	18,507