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Segment Information
 3 Months Ended
Mar. 31, 2021
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. Information related to the Company's reportable segments is shown below (in millions):
 Three-Month Periods
Ended March 31,
 20212020
Operating revenue:
PacifiCorp$1,242 $1,206 
MidAmerican Funding1,067 686 
NV Energy591 622 
Northern Powergrid300 266 
BHE Pipeline Group1,093 401 
BHE Transmission180 172 
BHE Renewables190 178 
HomeServices1,232 893 
BHE and Other(1)
186 103 
Total operating revenue$6,081 $4,527 
Depreciation and amortization:
PacifiCorp$264 $252 
MidAmerican Funding207 176 
NV Energy136 124 
Northern Powergrid71 63 
BHE Pipeline Group118 64 
BHE Transmission58 60 
BHE Renewables60 71 
HomeServices11 11 
BHE and Other(1)
2 — 
Total depreciation and amortization$927 $821 
 Three-Month Periods
Ended March 31,
 20212020
Operating income:
PacifiCorp$234 $234 
MidAmerican Funding48 102 
NV Energy70 79 
Northern Powergrid151 132 
BHE Pipeline Group618 249 
BHE Transmission81 76 
BHE Renewables33 17 
HomeServices112 20 
BHE and Other(1)
(14)10 
Total operating income1,333 919 
Interest expense(530)(483)
Capitalized interest14 17 
Allowance for equity funds26 34 
Interest and dividend income21 20 
(Losses) gains on marketable securities, net(1,118)27 
Other, net8 (27)
Total (loss) income before income tax benefit and equity loss$(246)$507 
Interest expense:
PacifiCorp$107 $102 
MidAmerican Funding78 81 
NV Energy52 58 
Northern Powergrid33 32 
BHE Pipeline Group38 14 
BHE Transmission38 38 
BHE Renewables40 42 
HomeServices1 5 
BHE and Other(1)
143 111 
Total interest expense$530 $483 
(Loss) earnings on common shares:
PacifiCorp$169 $176 
MidAmerican Funding144 150 
NV Energy34 20 
Northern Powergrid104 87 
BHE Pipeline Group383 179 
BHE Transmission59 55 
BHE Renewables16 95 
HomeServices84 10 
BHE and Other(1,027)(102)
(Loss) earnings on common shares$(34)$670 
 As of
 March 31,December 31,
20212020
Assets:
PacifiCorp$26,956 $26,862 
MidAmerican Funding24,098 23,530 
NV Energy14,594 14,501 
Northern Powergrid8,980 8,782 
BHE Pipeline Group19,651 19,541 
BHE Transmission9,341 9,208 
BHE Renewables11,935 12,004 
HomeServices5,186 4,955 
BHE and Other(1)
6,781 7,933 
Total assets$127,522 $127,316 

(1)The differences between the reportable segment amounts and the consolidated amounts, described as BHE and Other, relate principally to other entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.
 Three-Month Periods
Ended March 31,
 20212020
Operating revenue by country:
United States$5,597 $4,089 
United Kingdom300 266 
Canada177 171 
Philippines and other7 1 
Total operating revenue by country$6,081 $4,527 
(Loss) income before income tax benefit and equity loss by country:
United States$(423)$354 
United Kingdom132 109 
Canada39 40 
Philippines and other6 4 
Total (loss) income before income tax benefit and equity loss by country$(246)$507 

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period ended March 31, 2021 (in millions):
BHE Pipeline Group
PacifiCorpMidAmerican FundingNV EnergyNorthern PowergridBHE TransmissionBHE RenewablesHomeServices
Total
 
December 31, 2020$1,129 $2,102 $2,369 $1,000 $1,803 $1,551 $95 $1,457 $11,506 
Acquisitions— — — — — — — 1 1 
Foreign currency translation
— — — 6 — 21 — — 27 
March 31, 2021$1,129 $2,102 $2,369 $1,006 $1,803 $1,572 $95 $1,458 $11,534 
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 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 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.

The following tables provide information on a reportable segment basis (in millions):
Three-Month Periods
 Ended March 31,
20212020
Operating revenue:
Regulated electric$545 $471 
Regulated natural gas512 209 
Other10 1 
Total operating revenue$1,067 $681 
Operating income:
Regulated electric$9 $59 
Regulated natural gas39 39 
Total operating income48 98 
Interest expense(74)(76)
Allowance for borrowed funds2 3 
Allowance for equity funds6 8 
Other, net11 (5)
(Loss) income before income tax benefit$(7)$28 

As of
March 31,
2021		December 31,
2020
Assets:
Regulated electric$20,272 $19,892 
Regulated natural gas1,725 1,544 
Other3 1 
Total assets$22,000 $21,437 
MidAmerican Funding, LLC and Subsidiaries [Member]  
Segment Reporting Information [Line Items]  
Segment Reporting Disclosure [Text Block] Segment Information
MidAmerican Funding has identified two reportable 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 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
Ended March 31,
20212020
Operating revenue:
Regulated electric$545 $471 
Regulated natural gas512 209 
Other10 6 
Total operating revenue$1,067 $686 
Operating income:
Regulated electric$9 $59 
Regulated natural gas39 39 
Other— 4 
Total operating income48 102 
Interest expense(78)(81)
Allowance for borrowed funds2 3 
Allowance for equity funds6 8 
Other, net10 (6)
(Loss) income before income tax benefit$(12)$26 

As of
March 31,
2021		December 31,
2020
Assets(1):
Regulated electric$21,463 $21,083 
Regulated natural gas1,804 1,623 
Other7 5 
Total assets$23,274 $22,711 
(1)Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
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.

The following tables provide information on a reportable segment basis (in millions):
Three-Month Periods
Ended March 31,
20212020
Operating revenue:
Regulated electric$181 $184 
Regulated natural gas39 48 
Total operating revenue$220 $232 
Operating income:
Regulated electric$31 $33 
Regulated natural gas8 7 
Total operating income39 40 
Interest expense(14)(14)
Allowance for equity funds1 1 
Other, net6 1 
Income before income tax expense$32 $28 

As of
March 31,December 31,
20212020
Assets:
Regulated electric$3,589 $3,540 
Regulated natural gas348 342 
Other(1)
26 37 
Total assets$3,963 $3,919 

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