Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Information related to the Company's reportable segments is shown below (in millions):

	Years Ended December 31,
	2017			2016			2015
Operating revenue:
PacifiCorp	$	5,237		$	5,201		$	5,232
MidAmerican Funding	2,846			2,631			2,515
NV Energy	3,015			2,895			3,351
Northern Powergrid	949			995			1,140
BHE Pipeline Group	993			978			1,016
BHE Transmission	699			502			592
BHE Renewables	838			743			728
HomeServices	3,443			2,801			2,526
BHE and Other(1)	594			676			780
Total operating revenue	$	18,614		$	17,422		$	17,880
Depreciation and amortization:
PacifiCorp	$	796		$	783		$	780
MidAmerican Funding	500			479			407
NV Energy	422			421			410
Northern Powergrid	214			200			202
BHE Pipeline Group	159			206			204
BHE Transmission	239			241			185
BHE Renewables	251			230			216
HomeServices	66			31			29
BHE and Other(1)	(1		)	—			(5		)
Total depreciation and amortization	$	2,646		$	2,591		$	2,428
Operating income:
PacifiCorp	$	1,462		$	1,427		$	1,344
MidAmerican Funding	562			566			451
NV Energy	765			770			812
Northern Powergrid	436			494			593
BHE Pipeline Group	475			455			464
BHE Transmission	322			92			260
BHE Renewables	316			256			255
HomeServices	214			212			184
BHE and Other(1)	(38		)	(21		)	(35		)
Total operating income	4,514			4,251			4,328
Interest expense	(1,841		)	(1,854		)	(1,904		)
Capitalized interest	45			139			74
Allowance for equity funds	76			158			91
Interest and dividend income	111			120			107
Other, net	(398		)	36			39
Total income before income tax (benefit) expense and equity (loss) income	$	2,507		$	2,850		$	2,735

	Years Ended December 31,
	2017			2016			2015
Interest expense:
PacifiCorp	$	381		$	381		$	383
MidAmerican Funding	237			218			206
NV Energy	233			250			262
Northern Powergrid	133			136			145
BHE Pipeline Group	43			50			66
BHE Transmission	169			153			146
BHE Renewables	204			198			193
HomeServices	7			2			3
BHE and Other(1)	434			466			500
Total interest expense	$	1,841		$	1,854		$	1,904
Income tax (benefit) expense:
PacifiCorp	$	362		$	341		$	328
MidAmerican Funding	(202		)	(139		)	(150		)
NV Energy	221			200			207
Northern Powergrid	57			22			35
BHE Pipeline Group	170			163			158
BHE Transmission	(124		)	26			63
BHE Renewables(2)	(795		)	(32		)	41
HomeServices	49			81			72
BHE and Other(1)	(292		)	(259		)	(304		)
Total income tax (benefit) expense	$	(554	)	$	403		$	450
Capital expenditures:
PacifiCorp	$	769		$	903		$	916
MidAmerican Funding	1,776			1,637			1,448
NV Energy	456			529			571
Northern Powergrid	579			579			674
BHE Pipeline Group	286			226			240
BHE Transmission	334			466			966
BHE Renewables	323			719			1,034
HomeServices	37			20			16
BHE and Other	11			11			10
Total capital expenditures	$	4,571		$	5,090		$	5,875

	As of December 31,
	2017			2016			2015
Property, plant and equipment, net:
PacifiCorp	$	19,203		$	19,162		$	19,039
MidAmerican Funding	14,221			12,835			11,737
NV Energy	9,770			9,825			9,767
Northern Powergrid	6,075			5,148			5,790
BHE Pipeline Group	4,587			4,423			4,345
BHE Transmission	6,330			5,810			5,301
BHE Renewables	5,637			5,302			4,805
HomeServices	117			78			70
BHE and Other	(69		)	(74		)	(85		)
Total property, plant and equipment, net	$	65,871		$	62,509		$	60,769
Total assets:
PacifiCorp	$	23,086		$	23,563		$	23,550
MidAmerican Funding	18,444			17,571			16,315
NV Energy	13,903			14,320			14,656
Northern Powergrid	7,565			6,433			7,317
BHE Pipeline Group	5,134			5,144			4,953
BHE Transmission	9,009			8,378			7,553
BHE Renewables	7,687			7,010			5,892
HomeServices	2,722			1,776			1,705
BHE and Other	2,658			1,245			1,677
Total assets	$	90,208		$	85,440		$	83,618
	Years Ended December 31,
	2017			2016			2015
Operating revenue by country:
United States	$	16,916		$	15,895		$	16,121
United Kingdom	948			995			1,140
Canada	699			506			600
Philippines and other	51			26			19
Total operating revenue by country	$	18,614		$	17,422		$	17,880
Income before income tax (benefit) expense and equity (loss) income by country:
United States	$	1,927		$	2,264		$	2,034
United Kingdom	313			382			472
Canada	167			135			165
Philippines and other	100			69			64
Total income before income tax (benefit) expense and equity (loss) income by country:	$	2,507		$	2,850		$	2,735

	As of December 31,
	2017		2016		2015
Property, plant and equipment, net by country:
United States	$	53,579	$	51,671	$	49,680
United Kingdom	5,953		5,020		5,757
Canada	6,323		5,803		5,298
Philippines and other	16		15		34
Total property, plant and equipment, net by country	$	65,871	$	62,509	$	60,769

(1) The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate to other corporate entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

(2) Income tax (benefit) expense includes the tax attributes of disregarded entities that are not required to pay income taxes and the earnings of which are taxable directly to BHE.

Schedule of Goodwill [Table Text Block]

The following table shows the change in the carrying amount of goodwill by reportable segment for the years ended December 31, 2017 and 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			—		46		—			50
Foreign currency translation	—		—		—		(126		)	—			42			—		—		(2		)	(86		)
Other	—		—		—		—			(26		)	(4		)	—		—		—			(30		)
December 31, 2016	1,129		2,102		2,369		930			75			1,470			95		840		—			9,010
Acquisitions	—		—		—		—			—			—			—		508		—			508
Foreign currency translation	—		—		—		61			—			101			—		—		—			162
Other	—		—		—		—			(2		)	—			—		—		—			(2		)
December 31, 2017	$	1,129	$	2,102	$	2,369	$	991		$	73		$	1,571		$	95	$	1,348	$	—		$	9,678

MidAmerican Energy Company [Member]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

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

	Years Ended December 31,
	2017			2016			2015
Operating revenue:
Regulated electric	$	2,108		$	1,985		$	1,837
Regulated gas	719			637			661
Other	10			3			4
Total operating revenue	$	2,837		$	2,625		$	2,502
Depreciation and amortization:
Regulated electric	$	458		$	436		$	366
Regulated gas	42			43			41
Total depreciation and amortization	$	500		$	479		$	407
Operating income:
Regulated electric	$	485		$	497		$	385
Regulated gas	77			68			64
Other	(1		)	—			—
Total operating income	$	561		$	565		$	449
Interest expense:
Regulated electric	$	196		$	178		$	166
Regulated gas	18			18			17
Total interest expense	$	214		$	196		$	183
Income tax (benefit) expense from continuing operations:
Regulated electric	$	(212	)	$	(156	)	$	(163	)
Regulated gas	29			22			16
Other	—			2			—
Total income tax (benefit) expense from continuing operations	$	(183	)	$	(132	)	$	(147	)
Net income:
Regulated electric	$	570		$	512		$	413
Regulated gas	35			32			33
Other	—			(2		)	—
Income from continuing operations	605			542			446
Income on discontinued operations	—			—			16
Net income	$	605		$	542		$	462

	Years Ended December 31,
	2017		2016		2015
Utility construction expenditures:
Regulated electric	$	1,686	$	1,564	$	1,365
Regulated gas	87		72		81
Total utility construction expenditures	$	1,773	$	1,636	$	1,446
	As of December 31,
	2017		2016		2015
Total assets:
Regulated electric	$	14,914	$	14,113	$	12,970
Regulated gas	1,403		1,345		1,251
Other	1		1		164
Total assets	$	16,318	$	15,459	$	14,385

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

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

	Years Ended December 31,
	2017			2016			2015
Operating revenue:
Regulated electric	$	2,108		$	1,985		$	1,837
Regulated gas	719			637			661
Other	19			9			17
Total operating revenue	$	2,846		$	2,631		$	2,515
Depreciation and amortization:
Regulated electric	$	458		$	436		$	366
Regulated gas	42			43			41
Total depreciation and amortization	$	500		$	479		$	407
Operating income:
Regulated electric	$	485		$	497		$	385
Regulated gas	77			68			64
Other	—			1			2
Total operating income	$	562		$	566		$	451
Interest expense:
Regulated electric	$	196		$	178		$	166
Regulated gas	18			18			17
Other	23			23			23
Total interest expense	$	237		$	219		$	206
Income tax (benefit) expense from continuing operations:
Regulated electric	$	(212	)	$	(156	)	$	(163	)
Regulated gas	29			22			16
Other	(19		)	(5		)	(3		)
Total income tax (benefit) expense from continuing operations	$	(202	)	$	(139	)	$	(150	)
Net income:
Regulated electric	$	570		$	512		$	413
Regulated gas	35			32			33
Other	(31		)	(12		)	(4		)
Income from continuing operations	574			532			442
Income on discontinued operations	—			—			16
Net income	$	574		$	532		$	458
Utility construction expenditures:
Regulated electric	$	1,686		$	1,564		$	1,365
Regulated gas	87			72			81
Total utility construction expenditures	$	1,773		$	1,636		$	1,446

	As of December 31,
	2017		2016		2015
Total assets:
Regulated electric	$	16,105	$	15,304	$	14,161
Regulated gas	1,482		1,424		1,330
Other	34		19		183
Total assets	$	17,621	$	16,747	$	15,674

Schedule of Goodwill [Table Text Block]

Goodwill by reportable segment as of December 31, 2017 and 2016, was as follows (in millions):

Regulated electric	$	1,191
Regulated gas	79
Total	$	1,270

Sierra Pacific Power Company [Member]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following tables provide information on a reportable segment basis for the years ended December 31 (in millions):

	Years Ended December 31,
	2017		2016		2015
Operating revenue:
Regulated electric	$	713	$	702	$	810
Regulated gas	99		110		137
Total operating revenue	$	812	$	812	$	947
Cost of sales:
Regulated electric	$	268	$	265	$	374
Regulated gas	42		55		84
Total cost of sales	$	310	$	320	$	458
Gross margin:
Regulated electric	$	445	$	437	$	436
Regulated gas	57		55		53
Total gross margin	$	502	$	492	$	489
Operating and maintenance:
Regulated electric	$	148	$	153	$	149
Regulated gas	18		17		18
Total operating and maintenance	$	166	$	170	$	167
Depreciation and amortization:
Regulated electric	$	100	$	101	$	96
Regulated gas	14		17		17
Total depreciation and amortization	$	114	$	118	$	113
Operating income:
Regulated electric	$	176	$	161	$	168
Regulated gas	22		19		16
Total operating income	$	198	$	180	$	184
Interest expense:
Regulated electric	$	39	$	49	$	56
Regulated gas	4		5		5
Total interest expense	$	43	$	54	$	61
Income tax expense:
Regulated electric	$	48	$	44	$	43
Regulated gas	7		5		4
Total income tax expense	$	55	$	49	$	47

	Years Ended December 31,
	2017		2016		2015
Capital expenditures:
Regulated electric	$	169	$	176	$	229
Regulated gas	17		18		23
Total capital expenditures	$	186	$	194	$	252
	As of December 31,
Total assets:	2017		2016		2015
Regulated electric	$	3,103	$	3,119	$	3,060
Regulated gas	300		314		316
Regulated common assets(1)	10		60		111
Total assets	$	3,413	$	3,493	$	3,487

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