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Segment Information (Tables)
 9 Months Ended
Sep. 30, 2021
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information by Segment
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 PeriodsNine-Month Periods
Ended September 30,Ended September 30,
 2021202020212020
Operating revenue:
PacifiCorp$1,491 $1,479 $4,031 $3,829 
MidAmerican Funding966 812 2,726 2,114 
NV Energy1,085 1,042 2,443 2,359 
Northern Powergrid277 246 857 733 
BHE Pipeline Group785 264 2,584 890 
BHE Transmission185 175 547 516 
BHE Renewables316 309 773 731 
HomeServices1,743 1,742 4,738 3,828 
BHE and Other(1)
120 124 414 332 
Total operating revenue$6,968 $6,193 $19,113 $15,332 
Depreciation and amortization:
PacifiCorp$272 $234 $811 $696 
MidAmerican Funding218 179 634 530 
NV Energy138 128 411 377 
Northern Powergrid73 69 217 195 
BHE Pipeline Group124 45 363 134 
BHE Transmission59 61 177 176 
BHE Renewables61 72 182 214 
HomeServices14 11 37 34 
BHE and Other(1)
1 1 2 1 
Total depreciation and amortization$960 $800 $2,834 $2,357 
 Three-Month PeriodsNine-Month Periods
Ended September 30,Ended September 30,
 2021202020212020
Operating income:  
PacifiCorp$394 $361 $911 $851 
MidAmerican Funding287 232 438 444 
NV Energy348 347 563 587 
Northern Powergrid126 106 403 327 
BHE Pipeline Group303 101 1,166 442 
BHE Transmission90 79 256 236 
BHE Renewables149 143 279 244 
HomeServices135 239 426 336 
BHE and Other(1)
2 (61)(67)(65)
Total operating income1,834 1,547 4,375 3,402 
Interest expense(531)(504)(1,593)(1,490)
Capitalized interest18 24 46 60 
Allowance for equity funds34 50 90 122 
Interest and dividend income18 17 65 57 
Gains on marketable securities, net294 1,797 1,142 2,407 
Other, net8 36 64 61 
Total income before income tax (benefit) expense and equity loss$1,675 $2,967 $4,189 $4,619 
Interest expense:
PacifiCorp$110 $107 $322 $319 
MidAmerican Funding81 79 237 238 
NV Energy51 56 154 171 
Northern Powergrid33 34 98 97 
BHE Pipeline Group33 15 111 44 
BHE Transmission39 38 117 111 
BHE Renewables39 41 119 125 
HomeServices1 1 3 9 
BHE and Other(1)
144 133 432 376 
Total interest expense$531 $504 $1,593 $1,490 
Earnings on common shares:
PacifiCorp$333 $286 $728 $629 
MidAmerican Funding373 337 728 695 
NV Energy282 249 416 367 
Northern Powergrid83 26 162 172 
BHE Pipeline Group144 78 627 321 
BHE Transmission65 58 184 173 
BHE Renewables163 162 360 395 
HomeServices102 177 321 246 
BHE and Other(1)
351 1,469 580 1,630 
Total earnings on common shares$1,896 $2,842 $4,106 $4,628 
 As of
 September 30,December 31,
20212020
Assets:
PacifiCorp$28,230 $26,862 
MidAmerican Funding25,038 23,530 
NV Energy15,105 14,501 
Northern Powergrid9,043 8,782 
BHE Pipeline Group19,993 19,541 
BHE Transmission9,383 9,208 
BHE Renewables11,766 12,004 
HomeServices5,065 4,955 
BHE and Other(1)
7,931 7,933 
Total assets$131,554 $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.
Disaggregation of Revenue
The following table summarizes the Company's energy products and services revenue from contracts with customers ("Customer Revenue") by regulated and nonregulated, with further disaggregation of regulated by line of business, including a reconciliation to the Company's reportable segment information included in Note 13 (in millions):
For the Three-Month Period Ended September 30, 2021
PacifiCorpMidAmerican FundingNV EnergyNorthern PowergridBHE Pipeline GroupBHE TransmissionBHE Renewables
BHE and
Other(1)
Total
Customer Revenue:
Regulated:
Retail electric$1,352 $736 $1,008 $— $— $— $— $— $3,096 
Retail gas— 84 16 — — — — — 100 
Wholesale58 113 19 — 14 — — (1)203 
Transmission and
   distribution		55 15 35 241 — 175 — — 521 
Interstate pipeline— — — — 514 — — (28)486 
Other26 — — — (2)— — — 24 
Total Regulated1,491 948 1,078 241 526 175 — (29)4,430 
Nonregulated— 2 — 8 257 12 288 141 708 
Total Customer Revenue1,491 950 1,078 249 783 187 288 112 5,138 
Other revenue— 16 7 28 2 (2)28 8 87 
Total$1,491 $966 $1,085 $277 $785 $185 $316 $120 $5,225 
For the Nine-Month Period Ended September 30, 2021
PacifiCorpMidAmerican FundingNV EnergyNorthern PowergridBHE Pipeline GroupBHE TransmissionBHE Renewables
BHE and
Other(1)
Total
Customer Revenue:
Regulated:
Retail electric$3,685 $1,704 $2,227 $— $— $— $— $(1)$7,615 
Retail gas— 633 74 — — — — — 707 
Wholesale124 307 44 — 31 — — (2)504 
Transmission and
   distribution		117 45 78 747 — 525 — — 1,512 
Interstate pipeline— — — — 1,787 — — (94)1,693 
Other80 — 1 — (1)— — — 80 
Total Regulated4,006 2,689 2,424 747 1,817 525 — (97)12,111 
Nonregulated— 13 1 26 726 27 693 452 1,938 
Total Customer Revenue4,006 2,702 2,425 773 2,543 552 693 355 14,049 
Other revenue25 24 18 84 41 (5)80 59 326 
Total$4,031 $2,726 $2,443 $857 $2,584 $547 $773 $414 $14,375 
For the Three-Month Period Ended September 30, 2020
PacifiCorpMidAmerican FundingNV EnergyNorthern PowergridBHE Pipeline GroupBHE TransmissionBHE Renewables
BHE and
Other(1)
Total
Customer Revenue:
Regulated:
Retail electric$1,344 $661 $977 $— $— $— $— $(1)$2,981 
Retail gas— 70 14 — — — — — 84 
Wholesale59 56 14 — — — — 1 130 
Transmission and
   distribution		33 15 30 208 — 169 — — 455 
Interstate pipeline— — — — 264 — — (29)235 
Other42 — — — — — — — 42 
Total Regulated1,478 802 1,035 208 264 169 — (29)3,927 
Nonregulated— 4 (1)6 — 6 270 145 430 
Total Customer Revenue1,478 806 1,034 214 264 175 270 116 4,357 
Other revenue1 6 8 32 — — 39 8 94 
Total$1,479 $812 $1,042 $246 $264 $175 $309 $124 $4,451 
For the Nine-Month Period Ended September 30, 2020
PacifiCorpMidAmerican FundingNV EnergyNorthern PowergridBHE Pipeline GroupBHE TransmissionBHE Renewables
BHE and
Other(1)
Total
Customer Revenue:
Regulated:
Retail electric$3,532 $1,539 $2,144 $— $— $— $— $(1)$7,214 
Retail gas— 341 81 — — — — — 422 
Wholesale76 157 34 — — — — (1)266 
Transmission and
   distribution		79 48 75 632 — 502 — — 1,336 
Interstate pipeline— — — — 885 — — (103)782 
Other88 — 1 — — — — — 89 
Total Regulated3,775 2,085 2,335 632 885 502 — (105)10,109 
Nonregulated— 13 1 18 — 14 641 394 1,081 
Total Customer Revenue3,775 2,098 2,336 650 885 516 641 289 11,190 
Other revenue54 16 23 83 5 — 90 43 314 
Total$3,829 $2,114 $2,359 $733 $890 $516 $731 $332 $11,504 

(1)The BHE and Other reportable segment represents amounts related principally to other entities, including MidAmerican Energy Services, LLC, corporate functions and intersegment eliminations.

Real Estate Services

The following table summarizes the Company's real estate services Customer Revenue by line of business (in millions):
HomeServices
Three-Month PeriodsNine-Month Periods
Ended September 30,Ended September 30,
2021202020212020
Customer Revenue:
Brokerage$1,563 $1,449 $4,154 $3,183 
Franchise23 23 65 54 
Total Customer Revenue1,586 1,472 4,219 3,237 
Mortgage and other revenue157 270 519 591 
Total$1,743 $1,742 $4,738 $3,828 
 Three-Month PeriodsNine-Month Periods
Ended September 30,Ended September 30,
 2021202020212020
Operating revenue by country:
United States$6,499 $5,773 $17,700 $14,086 
United Kingdom277 246 857 733 
Canada180 174 537 512 
Philippines and other12 — 19 1 
Total operating revenue by country$6,968 $6,193 $19,113 $15,332 
Income before income tax (benefit) expense and equity loss by country:
United States$1,511 $2,839 $3,699 $4,220 
United Kingdom107 82 343 250 
Canada49 44 134 130 
Philippines and other8 2 13 19 
Total income before income tax (benefit) expense and equity loss by country$1,675 $2,967 $4,189 $4,619 
Schedule of Goodwill
The following table shows the change in the carrying amount of goodwill by reportable segment for the nine-month period ended September 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 — — 59 70 
Foreign currency translation
— — — (10)— 6 — — (4)
September 30, 2021$1,129 $2,102 $2,369 $990 $1,814 $1,557 $95 $1,516 $11,572 
MEC  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information by Segment
The following tables provide information on a reportable segment basis (in millions):
Three-Month PeriodsNine-Month Periods
 Ended September 30,Ended September 30,
2021202020212020
Operating revenue:
Regulated electric$854 $728 $1,985 $1,717 
Regulated natural gas110 80 728 384 
Other2 4 13 5 
Total operating revenue$966 $812 $2,726 $2,106 
Operating income:
Regulated electric$289 $238 $401 $398 
Regulated natural gas(2)(6)37 40 
Total operating income287 232 438 438 
Interest expense(76)(74)(224)(224)
Allowance for borrowed funds4 5 8 12 
Allowance for equity funds11 16 25 33 
Other, net8 14 34 30 
Income before income tax benefit$234 $193 $281 $289 

As of
September 30,
2021		December 31,
2020
Assets:
Regulated electric$21,063 $19,892 
Regulated natural gas1,874 1,544 
Other7 1 
Total assets$22,944 $21,437 
Disaggregation of Revenue
The following table summarizes MidAmerican Energy's revenue from contracts with customers ("Customer Revenue") by line of business, with further disaggregation of retail by customer class, including a reconciliation to MidAmerican Energy's reportable segment information included in Note 11 (in millions):
For the Three-Month Period Ended September 30, 2021For the Nine-Month Period Ended September 30, 2021
ElectricNatural GasOtherTotalElectricNatural GasOtherTotal
Customer Revenue:
Retail:
Residential$255 $52 $— $307 $586 $419 $— $1,005 
Commercial107 17 — 124 258 164 — 422 
Industrial321 5 — 326 741 20 — 761 
Natural gas transportation services— 9 — 9 — 28 — 28 
Other retail(1)
53 1 — 54 119 2 — 121 
Total retail736 84 — 820 1,704 633 — 2,337 
Wholesale88 25 — 113 214 93 — 307 
Multi-value transmission projects15 — — 15 45 — — 45 
Other Customer Revenue— — 2 2 — — 13 13 
Total Customer Revenue839 109 2 950 1,963 726 13 2,702 
Other revenue15 1 — 16 22 2 — 24 
Total operating revenue$854 $110 $2 $966 $1,985 $728 $13 $2,726 

For the Three-Month Period Ended September 30, 2020For the Nine-Month Period Ended September 30, 2020
ElectricNatural GasOtherTotalElectricNatural GasOtherTotal
Customer Revenue:
Retail:
Residential$241 $46 $— $287 $555 $233 $— $788 
Commercial99 13 — 112 242 71 — 313 
Industrial280 2 — 282 640 9 — 649 
Natural gas transportation services— 8 — 8 — 26 — 26 
Other retail(1)
42 1 — 43 103 2 — 105 
Total retail662 70 — 732 1,540 341 — 1,881 
Wholesale46 10 — 56 116 41 — 157 
Multi-value transmission projects14 — — 14 47 — — 47 
Other Customer Revenue— — 4 4 — — 5 5 
Total Customer Revenue722 80 4 806 1,703 382 5 2,090 
Other revenue6 — — 6 14 2 — 16 
Total operating revenue$728 $80 $4 $812 $1,717 $384 $5 $2,106 

(1)    Other retail includes provisions for rate refunds, for which any actual refunds will be reflected in the applicable customer classes upon resolution of the related regulatory proceeding.
MidAmerican Funding, LLC  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information by Segment
The following tables provide information on a reportable segment basis (in millions):
Three-Month PeriodsNine-Month Periods
Ended September 30,Ended September 30,
2021202020212020
Operating revenue:
Regulated electric$854 $728 $1,985 $1,717 
Regulated natural gas110 80 728 384 
Other2 4 13 13 
Total operating revenue$966 $812 $2,726 $2,114 
Operating income:
Regulated electric$289 $238 $401 $398 
Regulated natural gas(2)(6)37 40 
Other— — — 6 
Total operating income287 232 438 444 
Interest expense(81)(79)(237)(238)
Allowance for borrowed funds4 5 8 12 
Allowance for equity funds11 16 25 33 
Other, net8 15 34 30 
Income before income tax benefit$229 $189 $268 $281 

As of
September 30,
2021		December 31,
2020
Assets(1):
Regulated electric$22,254 $21,083 
Regulated natural gas1,953 1,623 
Other11 5 
Total assets$24,218 $22,711 
(1)Assets by reportable segment reflect the assignment of goodwill to applicable reporting units.
SPPC  
Segment Reporting Information [Line Items]  
Schedule of Segment Reporting Information by Segment
The following tables provide information on a reportable segment basis (in millions):
Three-Month PeriodsNine-Month Periods
Ended September 30,Ended September 30,
2021202020212020
Operating revenue:
Regulated electric$266 $220 $636 $569 
Regulated natural gas16 15 75 83 
Total operating revenue$282 $235 $711 $652 
Operating income:
Regulated electric$74 $66 $126 $119 
Regulated natural gas1 2 13 12 
Total operating income75 68 139 131 
Interest expense(14)(14)(41)(42)
Allowance for borrowed funds1 — 2 1 
Allowance for equity funds2 1 5 3 
Interest and dividend income3 1 6 3 
Other, net3 2 9 4 
Income before income tax expense$70 $58 $120 $100 

As of
September 30,December 31,
20212020
Assets:
Regulated electric$3,744 $3,540 
Regulated natural gas354 342 
Other(1)
32 37 
Total assets$4,130 $3,919 

(1)    Consists principally of cash and cash equivalents not included in either the regulated electric or regulated natural gas segments.
Disaggregation of Revenue
The following table summarizes Sierra Pacific's revenue from contracts with customers ("Customer Revenue") by line of business, with further disaggregation of retail by customer class, including a reconciliation to Sierra Pacific's reportable segment information included in Note 10 (in millions):
Three-Month Periods
Ended September 30,
20212020
ElectricNatural GasTotalElectricNatural GasTotal
Customer Revenue:
Retail:
Residential$91 $11 $102 $76 $11 $87 
Commercial84 3 87 71 3 74 
Industrial71 2 73 57 1 58 
Other1 — 1 1 — 1 
Total fully bundled247 16 263 205 15 220 
Distribution only service1 — 1 1 — 1 
Total retail248 16 264 206 15 221 
Wholesale, transmission and other18 — 18 13 — 13 
Total Customer Revenue266 16 282 219 15 234 
Other revenue— — — 1 — 1 
Total revenue$266 $16 $282 $220 $15 $235 
Nine-Month Periods
Ended September 30,
20212020
ElectricNatural GasTotalElectricNatural GasTotal
Customer Revenue:
Retail:
Residential$229 $50 $279 $208 $54 $262 
Commercial202 18 220 183 20 203 
Industrial151 6 157 132 8 140 
Other4 — 4 3 — 3 
Total fully bundled586 74 660 526 82 608 
Distribution only service2 — 2 3 — 3 
Total retail588 74 662 529 82 611 
Wholesale, transmission and other46 — 46 37 — 37 
Total Customer Revenue634 74 708 566 82 648 
Other revenue2 1 3 3 1 4 
Total revenue$636 $75 $711 $569 $83 $652