Property, Plant and Equipment, Net Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2015

Public Utility, Property, Plant and Equipment, Net [Line Items]

Depreciation and Amortization Rates [Table Text Block]

The average depreciation and amortization rates applied to depreciable utility plant for the years ended December 31 were as follows:

	2015		2014		2013
Electric	3.0	%	2.8	%	3.3	%
Gas	2.9	%	2.8	%	2.8	%

MidAmerican Energy Company [Member]

Public Utility, Property, Plant and Equipment, Net [Line Items]

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

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

	Depreciable Life	2015			2014
Utility plant in service:
Generation	20-100 years	$	10,404		$	9,351
Transmission	52-70 years	1,305			1,142
Electric distribution	20-70 years	3,059			2,933
Gas distribution	28-70 years	1,507			1,432
Utility plant in service		16,275			14,858
Accumulated depreciation and amortization		(5,229		)	(4,954		)
Utility plant in service, net		11,046			9,904
Nonregulated property, net:
Nonregulated property gross	5-45 years	15			14
Accumulated depreciation and amortization		(5		)	(5		)
Nonregulated property, net		10			9
		11,056			9,913
Construction work in progress		667			606
Property, plant and equipment, net		$	11,723		$	10,519

Nonregulated property includes land, computer software and other assets not recoverable for regulated utility purposes.