Segment Information

9 Months Ended

Sep. 30, 2016

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Segment Information

The Company's reportable segments with foreign operations include Northern Powergrid, whose business is principally in the United Kingdom, BHE Transmission, whose business includes operations in Canada, and BHE Renewables, whose business includes operations in the Philippines. Intersegment eliminations and adjustments, including the allocation of goodwill, have been made. Effective January 1, 2016, MidAmerican Energy transferred the assets and liabilities of its unregulated retail services business to MidAmerican Energy Services, LLC, a subsidiary of BHE. Prior period amounts have been changed to reflect this activity in BHE and Other. Information related to the Company's reportable segments is shown below (in millions):

	Three-Month Periods					Nine-Month Periods
	Ended September 30,					Ended September 30,
	2016		2015			2016		2015
Operating revenue:
PacifiCorp	$	1,434	$	1,423		$	3,919	$	3,942
MidAmerican Funding	797		681			2,008		1,984
NV Energy	987		1,124			2,309		2,665
Northern Powergrid	220		265			748		852
BHE Pipeline Group	201		196			704		736
BHE Transmission(1)	169		153			309		428
BHE Renewables	273		269			582		583
HomeServices	820		745			2,152		1,951
BHE and Other(2)	191		213			523		597
Total operating revenue	$	5,092	$	5,069		$	13,254	$	13,738
Depreciation and amortization:
PacifiCorp	$	193	$	194		$	589	$	584
MidAmerican Funding	118		101			338		300
NV Energy	106		103			315		307
Northern Powergrid	49		50			149		148
BHE Pipeline Group	53		51			160		151
BHE Transmission	61		56			177		147
BHE Renewables	57		55			169		160
HomeServices	9		8			24		20
BHE and Other(2)	2		(1		)	1		(3		)
Total depreciation and amortization	$	648	$	617		$	1,922	$	1,814

	Three-Month Periods						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016			2015
Operating income:
PacifiCorp	$	445		$	437		$	1,108		$	1,037
MidAmerican Funding	284			209			524			422
NV Energy	394			398			656			697
Northern Powergrid	90			129			373			452
BHE Pipeline Group	68			66			320			322
BHE Transmission(1)	81			62			35			166
BHE Renewables	157			153			233			225
HomeServices	87			78			179			161
BHE and Other(2)	(21		)	4			(36		)	(9		)
Total operating income	1,585			1,536			3,392			3,473
Interest expense	(460		)	(475		)	(1,401		)	(1,423		)
Capitalized interest(1)	14			18			128			69
Allowance for equity funds(1)	17			23			147			84
Interest and dividend income	39			27			93			79
Other, net	15			(9		)	26			27
Total income before income tax expense and equity income	$	1,210		$	1,120		$	2,385		$	2,309

Interest expense:
PacifiCorp	$	95	$	97	$	286	$	287
MidAmerican Funding	55		50		164		150
NV Energy	60		67		190		195
Northern Powergrid	33		37		105		108
BHE Pipeline Group	13		16		39		51
BHE Transmission	40		37		114		110
BHE Renewables	51		49		148		144
HomeServices	1		1		2		3
BHE and Other(2)	112		121		353		375
Total interest expense	$	460	$	475	$	1,401	$	1,423

Operating revenue by country:
United States	$	4,697	$	4,643	$	12,185	$	12,444
United Kingdom	220		265		748		852
Canada(1)	170		154		313		434
Philippines and other	5		7		8		8
Total operating revenue by country	$	5,092	$	5,069	$	13,254	$	13,738

Income before income tax expense and equity income by country:
United States	$	1,089	$	962	$	1,945	$	1,785
United Kingdom	74		98		284		364
Canada	43		41		114		119
Philippines and other	4		19		42		41
Total income before income tax expense and equity income by country	$	1,210	$	1,120	$	2,385	$	2,309

	As of
	September 30,		December 31,
	2016		2015
Total assets:
PacifiCorp	$	23,557	$	23,550
MidAmerican Funding	17,199		16,315
NV Energy	14,424		14,656
Northern Powergrid	6,727		7,317
BHE Pipeline Group	5,115		4,953
BHE Transmission	8,493		7,553
BHE Renewables	6,775		5,892
HomeServices	1,947		1,705
BHE and Other(2)	1,651		1,677
Total assets	$	85,888	$	83,618

(1) Refer to Note 4 for information regarding certain regulatory matters impacting AltaLink's financial results for the three- and nine-month periods endedSeptember 30, 2016.

(2) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, corporate functions and intersegment eliminations.

The following table shows the change in the carrying amount of goodwill by reportable segment for the nine-month period endedSeptember 30, 2016 (in millions):

										BHE									BHE
			MidAmerican		NV		Northern			Pipeline			BHE		BHE		Home-		and
	PacifiCorp		Funding		Energy		Powergrid			Group			Transmission		Renewables		Services		Other			Total
December 31, 2015	$	1,129	$	2,102	$	2,369	$	1,056		$	101		$	1,428	$	95	$	794	$	2		$	9,076
Acquisitions	—		—		—		—			—			4		—		41		1			46
Foreign currency translation	—		—		—		(92		)	—			77		—		—		(3		)	(18		)
Other	—		—		—		—			(19		)	—		—		—		—			(19		)
September 30, 2016	$	1,129	$	2,102	$	2,369	$	964		$	82		$	1,509	$	95	$	835	$	—		$	9,085

MidAmerican Energy Company [Member]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Segment Information

MidAmerican Energy has identified two reportable segments: regulated electric and regulated gas. The previously reported nonregulated energy segment consisted substantially of MidAmerican Energy's unregulated retail services business, which was transferred to a subsidiary of BHE and is excluded from the information presented below. Refer to Note 3 for further discussion. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the financial results and assets of remaining nonregulated operations.

The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016		2015
Operating revenue:
Regulated electric	$	692		$	585		$	1,572	$	1,472
Regulated gas	102			94			430		499
Other	1			1			2		3
Total operating revenue	$	795		$	680		$	2,004	$	1,974
Depreciation and amortization:
Regulated electric	$	107		$	91		$	306	$	270
Regulated gas	11			10			32		30
Total depreciation and amortization	$	118		$	101		$	338	$	300
Operating income:
Regulated electric	$	289		$	215		$	481	$	376
Regulated gas	(5		)	(6		)	42		45
Other	—			(1		)	—		(1		)
Total operating income	$	284		$	208		$	523	$	420

	As of
	September 30, 2016		December 31, 2015
Total assets:
Regulated electric	$	13,842	$	12,970
Regulated gas	1,240		1,251
Other(1)	1		164
Total assets	$	15,083	$	14,385

(1) Other total assets for December 31, 2015, includes amounts for MidAmerican Energy's unregulated retail services business transferred to a subsidiary of BHE.

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Segment Information

MidAmerican Funding has identified two reportable segments: regulated electric and regulated gas. The previously reported nonregulated energy segment consisted substantially of MidAmerican Energy's unregulated retail services business, which was transferred to a subsidiary of BHE and is excluded from the information presented below. Refer to Note 3 for further discussion. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the financial results and assets of nonregulated operations, MHC and MidAmerican Funding.

The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016		2015
Operating revenue:
Regulated electric	$	692		$	585		$	1,572	$	1,472
Regulated gas	102			94			430		499
Other	3			2			6		13
Total operating revenue	$	797		$	681		$	2,008	$	1,984
Depreciation and amortization:
Regulated electric	$	107		$	91		$	306	$	270
Regulated gas	11			10			32		30
Total depreciation and amortization	$	118		$	101		$	338	$	300
Operating income:
Regulated electric	$	289		$	215		$	481	$	376
Regulated gas	(5		)	(6		)	42		45
Other	—			—			1		1
Total operating income	$	284		$	209		$	524	$	422

	As of
	September 30, 2016		December 31, 2015
Total assets(1):
Regulated electric	$	15,033	$	14,161
Regulated gas	1,319		1,330
Other	20		183
Total assets	$	16,372	$	15,674

(1) Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units. Other total assets for December 31, 2015, includes amounts for MidAmerican Energy's unregulated retail services business transferred to a subsidiary of BHE.

Sierra Pacific Power Company [Member]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Segment Information

Sierra Pacific has identified two reportable operating segments: regulated electric and regulated natural gas. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated natural gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting natural gas owned by others through its distribution system. Pricing for regulated electric and regulated natural gas sales are established separately by the PUCN; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance.

Sierra Pacific believes presenting gross margin allows the reader to assess the impact of Sierra Pacific's regulatory treatment and its overall regulatory environment on a consistent basis and is meaningful. Gross margin is calculated as operating revenue less cost of fuel, energy and capacity and natural gas purchased for resale ("cost of sales"). The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2016		2015		2016		2015
Operating revenue:
Regulated electric	$	207	$	228	$	539	$	625
Regulated gas	15		18		81		94
Total operating revenue	$	222	$	246	$	620	$	719
Cost of sales:
Regulated electric	$	73	$	96	$	208	$	294
Regulated gas	5		7		42		57
Total cost of sales	$	78	$	103	$	250	$	351
Gross margin:
Regulated electric	$	134	$	132	$	331	$	331
Regulated gas	10		11		39		37
Total gross margin	$	144	$	143	$	370	$	368
Operating and maintenance:
Regulated electric	$	36	$	37	$	112	$	106
Regulated gas	4		5		14		13
Total operating and maintenance	$	40	$	42	$	126	$	119
Depreciation and amortization:
Regulated electric	$	26	$	24	$	76	$	72
Regulated gas	4		4		12		12
Total depreciation and amortization	$	30	$	28	$	88	$	84
Operating income:
Regulated electric	$	68	$	65	$	127	$	136
Regulated gas	1		1		11		10
Total operating income	$	69	$	66	$	138	$	146
Interest expense:
Regulated electric	$	11	$	14	$	38	$	42
Regulated gas	1		2		4		4
Total interest expense	$	12	$	16	$	42	$	46

	As of
	September 30,		December 31,
	2016		2015
Total assets:
Regulated electric	$	3,087	$	3,060
Regulated gas	312		316
Regulated common assets(1)	73		111
Total assets	$	3,472	$	3,487

(1) Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.