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Segment Information
 6 Months Ended
Jun. 30, 2021
Segment Reporting Information [Line Items]  
Segment Information 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 PeriodsSix-Month Periods
Ended June 30,Ended June 30,
 2021202020212020
Operating revenue:
PacifiCorp$1,298 $1,144 $2,540 $2,350 
MidAmerican Funding693 616 1,760 1,302 
NV Energy767 695 1,358 1,317 
Northern Powergrid280 221 580 487 
BHE Pipeline Group706 225 1,799 626 
BHE Transmission182 169 362 341 
BHE Renewables267 244 457 422 
HomeServices1,763 1,193 2,995 2,086 
BHE and Other(1)
108 105 294 208 
Total operating revenue$6,064 $4,612 $12,145 $9,139 
Depreciation and amortization:
PacifiCorp$275 $210 $539 $462 
MidAmerican Funding209 175 416 351 
NV Energy137 125 273 249 
Northern Powergrid73 63 144 126 
BHE Pipeline Group121 25 239 89 
BHE Transmission60 55 118 115 
BHE Renewables61 71 121 142 
HomeServices12 12 23 23 
BHE and Other(1)
(1)— 1 — 
Total depreciation and amortization$947 $736 $1,874 $1,557 
 Three-Month PeriodsSix-Month Periods
Ended June 30,Ended June 30,
 2021202020212020
Operating income:  
PacifiCorp$283 $256 $517 $490 
MidAmerican Funding103 110 151 212 
NV Energy145 161 215 240 
Northern Powergrid126 89 277 221 
BHE Pipeline Group245 92 863 341 
BHE Transmission85 81 166 157 
BHE Renewables97 84 130 101 
HomeServices179 77 291 97 
BHE and Other(1)
(55)(14)(69)(4)
Total operating income1,208 936 2,541 1,855 
Interest expense(532)(503)(1,062)(986)
Capitalized interest14 19 28 36 
Allowance for equity funds30 38 56 72 
Interest and dividend income26 20 47 40 
Gains on marketable securities, net1,966 583 848 610 
Other, net48 52 56 25 
Total income before income tax expense (benefit) and equity loss$2,760 $1,145 $2,514 $1,652 
Interest expense:
PacifiCorp$105 $110 $212 $212 
MidAmerican Funding78 78 156 159 
NV Energy51 57 103 115 
Northern Powergrid32 31 65 63 
BHE Pipeline Group40 15 78 29 
BHE Transmission40 35 78 73 
BHE Renewables40 42 80 84 
HomeServices1 3 2 8 
BHE and Other(1)
145 132 288 243 
Total interest expense$532 $503 $1,062 $986 
Earnings on common shares:
PacifiCorp$226 $167 $395 $343 
MidAmerican Funding211 208 355 358 
NV Energy100 98 134 118 
Northern Powergrid(25)59 79 146 
BHE Pipeline Group100 64 483 243 
BHE Transmission60 60 119 115 
BHE Renewables181 138 197 233 
HomeServices135 59 219 69 
BHE and Other1,256 263 229 161 
Earnings on common shares$2,244 $1,116 $2,210 $1,786 
 As of
 June 30,December 31,
20212020
Assets:
PacifiCorp$27,235 $26,862 
MidAmerican Funding24,156 23,530 
NV Energy14,839 14,501 
Northern Powergrid9,071 8,782 
BHE Pipeline Group19,739 19,541 
BHE Transmission9,516 9,208 
BHE Renewables11,754 12,004 
HomeServices5,410 4,955 
BHE and Other(1)
8,841 7,933 
Total assets$130,561 $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 PeriodsSix-Month Periods
Ended June 30,Ended June 30,
 2021202020212020
Operating revenue by country:
United States$5,604 $4,224 $11,201 $8,313 
United Kingdom280 221 580 487 
Canada180 167 357 338 
Philippines and other— — 7 1 
Total operating revenue by country$6,064 $4,612 $12,145 $9,139 
Income before income tax expense (benefit) and equity loss by country:
United States$2,611 $1,027 $2,188 $1,381 
United Kingdom104 59 236 168 
Canada46 46 85 86 
Philippines and other(1)13 5 17 
Total income before income tax expense (benefit) and equity loss by country$2,760 $1,145 $2,514 $1,652 

The following table shows the change in the carrying amount of goodwill by reportable segment for the six-month period ended June 30, 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— — — — 11 — — 2 13 
Foreign currency translation
— — — 9 — 42 — — 51 
June 30, 2021$1,129 $2,102 $2,369 $1,009 $1,814 $1,593 $95 $1,459 $11,570 
MEC  
Segment Reporting Information [Line Items]  
Segment Information 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 PeriodsSix-Month Periods
 Ended June 30,Ended June 30,
2021202020212020
Operating revenue:
Regulated electric$586 $518 $1,131 $989 
Regulated natural gas106 95 618 304 
Other1 — 11 1 
Total operating revenue$693 $613 $1,760 $1,294 
Operating income:
Regulated electric$103 $101 $112 $160 
Regulated natural gas— 7 39 46 
Other— — — — 
Total operating income103 108 151 206 
Interest expense(74)(74)(148)(150)
Allowance for borrowed funds2 4 4 7 
Allowance for equity funds8 9 14 17 
Other, net15 21 26 16 
Income before income tax benefit$54 $68 $47 $96 

As of
June 30,
2021		December 31,
2020
Assets:
Regulated electric$20,349 $19,892 
Regulated natural gas1,708 1,544 
Other— 1 
Total assets$22,057 $21,437 
MidAmerican Funding, LLC  
Segment Reporting Information [Line Items]  
Segment Information 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 PeriodsSix-Month Periods
Ended June 30,Ended June 30,
2021202020212020
Operating revenue:
Regulated electric$586 $518 $1,131 $989 
Regulated natural gas106 95 618 304 
Other1 3 11 9 
Total operating revenue$693 $616 $1,760 $1,302 
Operating income:
Regulated electric$103 $101 $112 $160 
Regulated natural gas— 7 39 46 
Other— 2 — 6 
Total operating income103 110 151 212 
Interest expense(78)(78)(156)(159)
Allowance for borrowed funds2 4 4 7 
Allowance for equity funds8 9 14 17 
Other, net16 21 26 15 
Income before income tax benefit$51 $66 $39 $92 

As of
June 30,
2021		December 31,
2020
Assets(1):
Regulated electric$21,540 $21,083 
Regulated natural gas1,787 1,623 
Other4 5 
Total assets$23,331 $22,711 
(1)Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
SPPC  
Segment Reporting Information [Line Items]  
Segment Information 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 PeriodsSix-Month Periods
Ended June 30,Ended June 30,
2021202020212020
Operating revenue:
Regulated electric$189 $165 $370 $349 
Regulated natural gas20 20 59 68 
Total operating revenue$209 $185 $429 $417 
Operating income:
Regulated electric$21 $20 $52 $53 
Regulated natural gas4 3 12 10 
Total operating income25 23 64 63 
Interest expense(13)(14)(27)(28)
Allowance for borrowed funds1 1 1 1 
Allowance for equity funds2 1 3 2 
Other, net3 3 9 4 
Income before income tax expense$18 $14 $50 $42 

As of
June 30,December 31,
20212020
Assets:
Regulated electric$3,665 $3,540 
Regulated natural gas350 342 
Other(1)
27 37 
Total assets$4,042 $3,919 

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