Property, Plant and Equipment, Net (Notes)

6 Months Ended

Jun. 30, 2015

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

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

		As of
	Depreciable Life	June 30,			December 31,
		2015			2014
Utility plant in-service:
Electric generation	40-125 years	$	1,111		$	1,036
Electric distribution	20-70 years	1,351			1,321
Electric transmission	50-70 years	725			719
Electric general and intangible plant	5-65 years	131			123
Natural gas distribution	40-70 years	368			366
Natural gas general and intangible plant	8-10 years	13			13
Common general	5-65 years	245			234
Utility plant in-service		3,944			3,812
Accumulated depreciation and amortization		(1,356		)	(1,300		)
Utility plant in-service, net		2,588			2,512
Construction work-in-progress		74			128
Property, plant and equipment, net		$	2,662		$	2,640