Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net [Table Text Block]

Property, plant and equipment, net consists of the following as of December 31 (in millions):

	Depreciable
	Life	2013			2012
Regulated assets:
Utility generation, distribution and transmission system	5-80 years	$	57,490		$	42,682
Interstate pipeline assets	3-80 years	6,448			6,354
		63,938			49,036
Accumulated depreciation and amortization		(19,874		)	(15,338		)
Regulated assets, net		44,064			33,698
Nonregulated assets:
Independent power plants	5-30 years	1,994			1,428
Other assets	3-30 years	522			432
		2,516			1,860
Accumulated depreciation and amortization		(678		)	(591		)
Nonregulated assets, net		1,838			1,269
Net operating assets		45,902			34,967
Construction work-in-progress		4,217			2,647
Property, plant and equipment, net		$	50,119		$	37,614