Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2013

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

(4) Property, Plant and Equipment, Net

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

		As of
	Depreciable	September 30,			December 31,
	Life	2013			2012
Regulated assets:
Utility generation, distribution and transmission system	5-80 years	$	43,899		$	42,682
Interstate pipeline assets	3-80 years	6,388			6,354
		50,287			49,036
Accumulated depreciation and amortization		(16,128		)	(15,338		)
Regulated assets, net		34,159			33,698
Nonregulated assets:
Independent power plants	5-30 years	1,941			1,428
Other assets	3-30 years	483			432
		2,424			1,860
Accumulated depreciation and amortization		(651		)	(591		)
Nonregulated assets, net		1,773			1,269
Net operating assets		35,932			34,967
Construction work-in-progress		3,504			2,647
Property, plant and equipment, net		$	39,436		$	37,614

Construction work-in-progress includes $2.3 billion and $1.9 billion as of September 30, 2013 and December 31, 2012 related to the construction of regulated assets.