Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2018

Property, Plant and Equipment [Line Items]

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



		As of
	Depreciable	March 31,			December 31,
	Life	2018			2017
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	75,068		$	74,660
Interstate natural gas pipeline assets	3-80 years	7,230			7,176
		82,298			81,836
Accumulated depreciation and amortization		(24,957		)	(24,478		)
Regulated assets, net		57,341			57,358

Nonregulated assets:
Independent power plants	5-30 years	6,034			6,010
Other assets	3-30 years	1,588			1,489
		7,622			7,499
Accumulated depreciation and amortization		(1,644		)	(1,542		)
Nonregulated assets, net		5,978			5,957

Net operating assets		63,319			63,315
Construction work-in-progress		2,735			2,556
Property, plant and equipment, net		$	66,054		$	65,871

Construction work-in-progress includes $2.4 billion as of March 31, 2018 and $2.2 billion as of December 31, 2017, related to the construction of regulated assets.

MidAmerican Funding, LLC and Subsidiaries [Domain]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Net

Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements. In addition to MidAmerican Energy's property, plant and equipment, net, MidAmerican Funding had as of March 31, 2018 and December 31, 2017, nonregulated property gross of $24 million and related accumulated depreciation and amortization of $10 million, which consisted primarily of a corporate aircraft owned by MHC.

MidAmerican Energy Company [Member]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Net

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



		As of
		March 31,			December 31,
	Depreciable Life	2018			2017
Utility plant in service, net:
Generation	20-70 years	$	12,108		$	12,107
Transmission	52-75 years	1,844			1,838
Electric distribution	20-75 years	3,418			3,380
Gas distribution	29-75 years	1,652			1,640
Utility plant in service		19,022			18,965
Accumulated depreciation and amortization		(5,670		)	(5,561		)
Utility plant in service, net		13,352			13,404
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		13,358			13,410
Construction work-in-progress		910			797
Property, plant and equipment, net		$	14,268		$	14,207

PacifiCorp [Member]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Net

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



		As of
		March 31,			December 31,
	Depreciable Life	2018			2017
Utility Plant:
Utility plant in-service	5-75 years	$	27,947		$	27,880
Accumulated depreciation and amortization		(9,503		)	(9,366		)
Utility plant in-service, net		18,444			18,514
Other non-regulated, net of accumulated depreciation and amortization	45 years	11			11
Plant, net		18,455			18,525
Construction work-in-progress		735			678
Property, plant and equipment, net		$	19,190		$	19,203

Nevada Power Company [Member]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Net

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2018			2017
Utility plant:
Generation	30 - 55 years	$	3,707		$	3,707
Distribution	20 - 65 years	3,329			3,314
Transmission	45 - 70 years	1,864			1,860
General and intangible plant	5 - 65 years	805			793
Utility plant		9,705			9,674
Accumulated depreciation and amortization		(2,930		)	(2,871		)
Utility plant, net		6,775			6,803
Other non-regulated, net of accumulated depreciation and amortization	45 years	2			1
Plant, net		6,777			6,804
Construction work-in-progress		78			73
Property, plant and equipment, net		$	6,855		$	6,877

During 2017, Nevada Power revised its electric depreciations rates effective January 2018 based on the results of a new depreciation study, the most significant impact of which was shorter estimated useful lives at the Navajo Generating Station and longer average service lives for various other utility plant groups. The net effect of these changes will increase depreciation and amortization expense by $7 million annually, or $2 million for the three-month period ended March 31, 2018, based on depreciable plant balances at the time of the change.

Sierra Pacific Power Company [Member]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Net

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2018			2017
Utility plant:
Electric generation	25 - 60 years	$	1,143		$	1,144
Electric distribution	20 - 100 years	1,470			1,459
Electric transmission	50 - 100 years	791			786
Electric general and intangible plant	5 - 70 years	181			181
Natural gas distribution	35 - 70 years	390			390
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	296			294
Utility plant		4,285			4,268
Accumulated depreciation and amortization		(1,531		)	(1,513		)
Utility plant, net		2,754			2,755
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,759			2,760
Construction work-in-progress		142			132
Property, plant and equipment, net		$	2,901		$	2,892