Property, Plant and Equipment, Net 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
Property, plant and equipment:
Generation	20 - 80 years	$	11,058		$	10,952
Transmission	25 - 75 years	5,235			4,732
Distribution	20 - 65 years	6,030			5,859
Intangible plant(1)	5 - 65 years	857			850
Other	5 - 50 years	1,688			1,631
Property, plant and equipment in service		24,868			24,024
Accumulated depreciation and amortization		(7,686		)	(7,222		)
Net property, plant and equipment in service		17,182			16,802
Construction work-in-progress		1,325			1,255
Total property, plant and equipment, net		$	18,507		$	18,057

(1) Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.