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Related Party Transactions
 12 Months Ended
Dec. 31, 2023
PAC  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
PacifiCorp has an intercompany administrative services agreement and a mutual assistance agreement with BHE and its subsidiaries. Amounts charged to PacifiCorp by BHE and its subsidiaries under these agreements totaled $168 million, $123 million and $70 million during the years ended December 31, 2023, 2022 and 2021, respectively. Amounts charged to PacifiCorp in 2023 and 2022 were primarily reflected in construction work in progress on the Consolidated Balance Sheets as of December 31, 2023 and 2022. Payables associated with the charges were $15 million and $16 million as of December 31, 2023 and 2022, respectively. Amounts charged by PacifiCorp to BHE and its subsidiaries under these agreements totaled $44 million, $23 million and $8 million during the years ended December 31, 2023, 2022 and 2021, respectively. Receivables associated with the charges were $8 million and $3 million as of December 31, 2023 and 2022, respectively. Such amounts primarily relate to information technology projects and other costs managed at a consolidated level and allocated or passed through to affiliates.

PacifiCorp also engages in various transactions with several subsidiaries of BHE in the ordinary course of business. Services provided by these subsidiaries in the ordinary course of business and charged to PacifiCorp primarily relate to wholesale electricity purchases and transmission of electricity, transportation of natural gas and employee relocation services. These expenses totaled $6 million, $8 million and $6 million during the years ended December 31, 2023, 2022 and 2021, respectively.

PacifiCorp has long-term transportation contracts with BNSF Railway Company, an indirect wholly owned subsidiary of Berkshire Hathaway, PacifiCorp's ultimate parent company. Transportation costs under these contracts were $24 million, $21 million and $19 million during the years ended December 31, 2023, 2022 and 2021, respectively.

PacifiCorp has a long-term master materials supply contract with Marmon Utility, LLC, an indirect wholly owned subsidiary of a holding company in which Berkshire Hathaway holds a majority interest. Materials and supplies purchased under this contract were $17 million, $8 million and $2 million during the years ended December 31, 2023, 2022 and 2021, respectively.

PacifiCorp is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated U.S. federal income tax return. Federal and state income taxes receivable from BHE were $114 million and $84 million as of December 31, 2023 and 2022, respectively. For the years ended December 31, 2023, 2022 and 2021, cash refunded from BHE for federal and state income taxes totaled $292 million, $185 million and $120 million.

PacifiCorp transacts with its equity investees, Bridger Coal and Trapper Mining Inc. Services provided by equity investees to PacifiCorp primarily relate to coal purchases. During the years ended December 31, 2023, 2022 and 2021, coal purchases from PacifiCorp's equity investees totaled $139 million, $119 million and $148 million, respectively. Payables to PacifiCorp's equity investees were $34 million and $10 million as of December 31, 2023 and 2022, respectively.
MEC  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
The companies identified as affiliates of MidAmerican Energy are Berkshire Hathaway and its subsidiaries, including BHE and its subsidiaries. The basis for the following transactions is provided for in service agreements between MidAmerican Energy and the affiliates.

MidAmerican Energy is reimbursed for charges incurred on behalf of its affiliates. The majority of these reimbursed expenses are for general costs, such as insurance and building rent, and for employee wages, benefits and costs related to corporate functions such as information technology, human resources, treasury, legal and accounting. The amount of such reimbursements was $94 million, $78 million and $66 million for 2023, 2022 and 2021, respectively.

MidAmerican Energy reimbursed BHE in the amount of $123 million, $79 million and $72 million in 2023, 2022 and 2021, respectively, for its share of technology costs, corporate expenses and other costs. Amounts charged to MidAmerican Energy in 2023 and 2022 were primarily reflected in construction work-in-progress on the Balance Sheets as of December 31, 2023 and 2022.

MidAmerican Energy purchases, in the normal course of business at either tariffed or market prices, natural gas transportation and storage capacity services from Northern Natural Gas Company, a wholly owned subsidiary of BHE, and coal transportation services from BNSF Railway Company, an indirect wholly owned subsidiary of Berkshire Hathaway. These purchases totaled $141 million, $141 million and $132 million in 2023, 2022 and 2021, respectively.

MidAmerican Energy had accounts receivable from affiliates of $9 million and $9 million as of December 31, 2023 and 2022, respectively, that are included in other current assets on the Balance Sheets. MidAmerican Energy also had accounts payable to affiliates of $32 million and $22 million as of December 31, 2023 and 2022, respectively, that are included in accounts payable on the Balance Sheets.

MidAmerican Energy is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated U.S. federal income tax return. For current federal and state income taxes, MidAmerican Energy had a net payable to BHE of $21 million and a receivable from BHE of $42 million as of December 31, 2023 and 2022, respectively. MidAmerican Energy received net cash payments for federal and state income taxes from BHE totaling $852 million, $840 million and $746 million for the years ended December 31, 2023, 2022 and 2021, respectively.

MidAmerican Energy recognizes the full amount of the funded status for its pension and postretirement plans, and amounts attributable to MidAmerican Energy's affiliates that have not previously been recognized through income are recognized as an intercompany balance with such affiliates. MidAmerican Energy adjusts these balances when changes to the funded status of the respective plans are recognized and does not intend to settle the balances currently. Amounts receivable from affiliates attributable to the funded status of employee benefit plans totaled $82 million and $79 million as of December 31, 2023 and 2022, respectively, and are included in other assets on the Balance Sheets. Similar amounts payable to affiliates totaled $55 million and $40 million as of December 31, 2023 and 2022, respectively, and are included in other long-term liabilities on the Balance Sheets. See Note 10 for further information pertaining to pension and postretirement accounting.
MidAmerican Funding, LLC  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
The companies identified as affiliates of MidAmerican Funding are Berkshire Hathaway and its subsidiaries, including BHE and its subsidiaries. The basis for the following transactions is provided for in-service agreements between MidAmerican Funding and the affiliates.

MidAmerican Funding is reimbursed for charges incurred on behalf of its affiliates. The majority of these reimbursed expenses are for allocated general costs, such as insurance and building rent, and for employee wages, benefits and costs for corporate functions, such as information technology, human resources, treasury, legal and accounting. The amount of such reimbursements was $94 million, $77 million and $65 million for 2023, 2022 and 2021, respectively.

MidAmerican Funding reimbursed BHE in the amount of $123 million, $79 million and $72 million in 2023, 2022 and 2021, respectively, for its share of technology costs, corporate expenses and other costs. Amounts charged to MidAmerican Funding in 2023 and 2022 were primarily reflected in construction work-in-progress on the Consolidated Balance Sheets as of December 31, 2023 and 2022.

MidAmerican Energy purchases, in the normal course of business at either tariffed or market prices, natural gas transportation and storage capacity services from Northern Natural Gas Company, a wholly owned subsidiary of BHE and coal transportation services from BNSF Railway Company, a wholly owned subsidiary of Berkshire Hathaway. These purchases totaled $141 million, $141 million and $132 million in 2023, 2022 and 2021, respectively.

MidAmerican Funding had accounts receivable from affiliates of $10 million and $10 million as of December 31, 2023 and 2022, respectively, that are included in other current assets on the Consolidated Balance Sheets. MidAmerican Funding also had accounts payable to affiliates of $32 million and $22 million as of December 31, 2023 and 2022, respectively, that are included in accounts payable on the Consolidated Balance Sheets.

MidAmerican Funding is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated U.S. federal income tax return. For current federal and state income taxes, MidAmerican Funding had a net payable to BHE of $21 million and a receivable from BHE of $43 million as of December 31, 2023 and 2022, respectively. MidAmerican Funding received net cash payments for federal and state income taxes from BHE totaling $855 million, $845 million and $751 million for the years ended December 31, 2023, 2022 and 2021, respectively.
MidAmerican Funding recognizes the full amount of the funded status for its pension and postretirement plans, and amounts attributable to MidAmerican Funding's affiliates that have not previously been recognized through income are recognized as an intercompany balance with such affiliates. MidAmerican Funding adjusts these balances when changes to the funded status of the respective plans are recognized and does not intend to settle the balances currently. Amounts receivable from affiliates attributable to the funded status of employee benefit plans totaled $82 million and $79 million as of December 31, 2023 and 2022, respectively, and are included in other assets on the Consolidated Balance Sheets. Similar amounts payable to affiliates totaled $55 million and $40 million as of December 31, 2023 and 2022, respectively, and are included in other long-term liabilities on the Consolidated Balance Sheets. See Note 10 for further information pertaining to pension and postretirement accounting.

The indenture pertaining to MidAmerican Funding's long-term debt restricts MidAmerican Funding from paying a distribution on its equity securities, unless after making such distribution either its debt to total capital ratio does not exceed 0.67:1.0 and its interest coverage ratio is not less than 2.2:1.0 or its senior secured long-term debt rating is at least BBB or its equivalent. MidAmerican Funding may seek a release from this restriction upon delivery to the indenture trustee of written confirmation from the ratings agencies that without this restriction MidAmerican Funding's senior secured long-term debt would be rated at least BBB+.
NPC  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
Nevada Power has an intercompany administrative services agreement with BHE and its subsidiaries. Amounts charged to Nevada Power under this agreement, either directly or through NV Energy, totaled $55 million, $46 million and $30 million for the years ended December 31, 2023, 2022 and 2021, respectively. Amounts charged to Nevada Power in 2023 and 2022 primarily relate to information technology projects billed at a consolidated level and passed through to affiliates.

Kern River Gas Transmission Company, an indirect subsidiary of BHE, provided natural gas transportation and other services to Nevada Power of $50 million, $49 million, $52 million for the years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023 and 2022, Nevada Power's Consolidated Balance Sheets included amounts due to Kern River Gas Transmission Company of $4 million and $3 million, respectively.

Nevada Power provided electricity and other services to PacifiCorp, an indirect subsidiary of BHE, of $1 million, $4 million and $3 million for the years ended December 31, 2023, 2022 and 2021, respectively. There were no receivables associated with these services as of December 31, 2023 and 2022.

Nevada Power provided electricity to Sierra Pacific of $230 million, $362 million and $179 million for the years ended December 31, 2023, 2022 and 2021, respectively. Receivables associated with these transactions were $10 million and $41 million as of December 31, 2023 and 2022, respectively. Nevada Power purchased electricity from Sierra Pacific of $70 million, $86 million and $43 million for the years ended December 31, 2023, 2022 and 2021, respectively. Payables associated with these transactions were $1 million and $5 million as of December 31, 2023 and 2022, respectively.

Nevada Power incurs intercompany administrative and shared facility costs with NV Energy and Sierra Pacific. These transactions are governed by an intercompany service agreement and are priced at cost. Nevada Power provided services to NV Energy of $4 million, $3 million and $1 million for each of the years ending December 31, 2023, 2022 and 2021, respectively. NV Energy provided services to Nevada Power of $9 million for the years ending December 31, 2023, 2022 and 2021. Nevada Power provided services to Sierra Pacific of $28 million, $25 million and $25 million for the years ended December 31, 2023, 2022 and 2021, respectively. Sierra Pacific provided services to Nevada Power of $19 million, $16 million and $15 million for the years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023 and 2022, Nevada Power's Consolidated Balance Sheets included amounts due to NV Energy of $82 million and $51 million, respectively. There were no receivables due from NV Energy as of December 31, 2023 and 2022. In November 2022, Nevada Power entered into a $100 million unsecured note with NV Energy receivable upon demand and $— million and $100 million was outstanding as of December 31, 2023 and 2022, respectively. As of December 31, 2023 and 2022, Nevada Power's Consolidated Balance Sheets included receivables due from Sierra Pacific of $— million and $33 million, respectively. There were $20 million and $— million payables due to Sierra Pacific as of December 31, 2023 and 2022.

Nevada Power is party to a tax-sharing agreement with NV Energy and NV Energy is part of the Berkshire Hathaway consolidated U.S. federal income tax return. Federal income taxes payable to NV Energy were $31 million as of December 31, 2023 and federal income taxes receivable from NV Energy were $12 million as of December 31, 2022. Nevada Power received cash refunds of $52 million and $29 million for federal income taxes for the years ended December 31, 2023 and 2022, respectively and made cash payments of $63 million for federal income taxes for the year ended December 31, 2021.

Certain disbursements for accounts payable and payroll are made by NV Energy on behalf of Nevada Power and reimbursed automatically when settled by the bank. These amounts are recorded as accounts payable at the time of disbursement.
SPPC  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
Sierra Pacific has an intercompany administrative services agreement with BHE and its subsidiaries. Amounts charged to Sierra Pacific under this agreement, either directly or through NV Energy, totaled $27 million, $23 million and $14 million for the years ended December 31, 2023, 2022 and 2021. Amounts charged to Sierra Pacific in 2023 and 2022 primarily relate to information technology projects billed at a consolidated level and passed through to affiliates.

Sierra Pacific provided electricity to Nevada Power of $70 million, $86 million and $43 million for the years ended December 31, 2023, 2022 and 2021, respectively. Receivables associated with these transactions were $1 million and $5 million as of December 31, 2023 and 2022, respectively. Sierra Pacific purchased electricity from Nevada Power of $230 million, $362 million and $179 million for the years ended December 31, 2023, 2022 and 2021, respectively. Payables associated with these transactions were $10 million and $41 million as of December 31, 2023 and 2022, respectively.

Sierra Pacific incurs intercompany administrative and shared facility costs with NV Energy and Nevada Power. These transactions are governed by an intercompany service agreement and are priced at cost. NV Energy provided services to Sierra Pacific of $5 million for the years ending December 31, 2023, 2022 and 2021, respectively. Sierra Pacific provided services to Nevada Power of $19 million, $16 million, and $15 million for the years ended December 31, 2023, 2022 and 2021, respectively. Nevada Power provided services to Sierra Pacific of $28 million, $25 million, and $25 million for the years ended December 31, 2023, 2022 and 2021, respectively. Sierra Pacific provided services to NV Energy of $1 million, $1 million, and $— million for the years ended December 31, 2023, 2022 and 2021, respectively. As of December 31, 2023 and 2022, Sierra Pacific's Consolidated Balance Sheets included amounts due to NV Energy of $24 million and $47 million, respectively. There were no receivables due from NV Energy as of December 31, 2023 and 2022. In November 2022, Sierra Pacific entered into a $100 million unsecured note with NV Energy payable upon demand and $— million and $70 million was outstanding as of December 31, 2023 and 2022, respectively. As of December 31, 2023 and 2022, Sierra Pacific's Consolidated Balance Sheets included payables due to Nevada Power of $— million and $33 million, respectively. There were $20 million and $— million receivables due from Nevada Power as of December 31, 2023 and 2022.

Sierra Pacific is party to a tax-sharing agreement with NV Energy and NV Energy is part of the Berkshire Hathaway consolidated U.S. federal income tax return. Federal income taxes payable to NV Energy were $4 million as of December 31, 2023 and federal income taxes receivable from NV Energy were $11 million as of December 31, 2022. Sierra Pacific made cash payments of $55 million for federal income taxes for the year ended December 31, 2023 and received cash refunds of $1 million and $3 million for federal income taxes for the years ended December 31, 2022 and 2021, respectively.

Certain disbursements for accounts payable and payroll are made by NV Energy on behalf of Sierra Pacific and reimbursed automatically when settled by the bank. These amounts are recorded as accounts payable at the time of disbursement.
EEGH  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
Eastern Energy Gas is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated U.S. federal income tax return. For current federal and state income taxes, Eastern Energy Gas had a receivable from BHE of $67 million and $16 million as of December 31, 2023 and 2022, respectively. Eastern Energy Gas received net cash receipts for federal and state income taxes from BHE totaling $47 million for the year ended December 31, 2021.

As of December 31, 2022, Eastern Energy Gas had $1 million of natural gas imbalances payable to affiliates, presented in other current liabilities on the Consolidated Balance Sheets.
Presented below are Eastern Energy Gas' significant transactions with affiliated and related parties for the years ended December 31 (in millions):
202320222021
Sales of natural gas and transmission and storage services$5 $27 $32 
Purchases of natural gas and transmission and storage services— 4 5 
Services provided by related parties(1)
99 83 51 
Services provided to related parties35 38 32 
(1)Includes capitalized expenditures.

Eastern Energy Gas participates in certain MidAmerican Energy benefit plans as described in Note 10. As of December 31, 2023 and 2022, Eastern Energy Gas' amount due to MidAmerican Energy associated with these plans and reflected in other long-term liabilities on the Consolidated Balance Sheets was $53 million and $51 million, respectively.

Borrowings with BHE GT&S

Eastern Energy Gas has a $400 million intercompany revolving credit agreement from its parent, BHE GT&S, expiring in March 2025. The credit agreement, which is for general corporate purposes and provides for the issuance of letters of credit, has a variable interest rate based on the Secured Overnight Financing Rate ("SOFR") plus a fixed spread. Net outstanding borrowings totaled $400 million with a weighted-average interest rate of 5.84% as of December 31, 2023. Interest expense related to this borrowing totaled $4 million for the year ended December 31, 2023. There were no amounts outstanding under the credit agreement as of December 31, 2022.

BHE GT&S has a $650 million intercompany revolving credit agreement from Eastern Energy Gas expiring in November 2024. The credit agreement has a variable interest rate based on SOFR plus a fixed spread. There were no amounts outstanding under the credit agreement as of December 31, 2023. As of December 31, 2022, $536 million was outstanding under the credit agreement. Interest income related to this borrowing totaled $20 million and $7 million for the years ended December 31, 2023 and 2022, respectively.
EGTS  
Related Party Transaction [Line Items]  
Related Party Transactions Related Party Transactions
EGTS is party to a tax-sharing agreement and is part of the Berkshire Hathaway consolidated U.S. federal income tax return. For current federal and state income taxes, EGTS had a receivable from BHE of $57 million and $21 million as of December 31, 2023 and 2022, respectively. EGTS received net cash receipts for federal and state income taxes from BHE totaling $10 million for the year ended December 31, 2021.

Trade receivables, net as of December 31, 2022 included $2 million of accrued unbilled revenue. This revenue is based on estimated amounts of services provided but not yet billed to an affiliate.

As of December 31, 2023, EGTS had $2 million of natural gas imbalances receivable from affiliates, presented in natural gas imbalances on the Consolidated Balance Sheets. As of December 31, 2022, EGTS had $10 million of natural gas imbalances payable to affiliates, presented in other current liabilities on the Consolidated Balance Sheets.

EGTS participates in certain MidAmerican Energy benefit plans as described in Note 10. As of December 31, 2023 and 2022, EGTS' amount due to MidAmerican Energy associated with these plans and reflected in other long-term liabilities on the Consolidated Balance Sheets was $48 million and $47 million, respectively.

Presented below are EGTS' significant transactions with related parties for the years ended December 31 (in millions):

202320222021
Sales of natural gas and transmission and storage services$4 $26 $28 
Purchases of natural gas and transmission and storage services— 4 5 
Services provided by related parties(1)
58 46 26 
Services provided to related parties59 62 57 
(1)Includes capitalized expenditures.

Borrowings With Eastern Energy Gas

EGTS has a $400 million intercompany revolving credit agreement from its parent, Eastern Energy Gas, expiring in March 2025. The credit agreement, which is for general corporate purposes, has a variable interest rate based on the Secured Overnight Financing Rate ("SOFR") plus a fixed spread. Net outstanding borrowings totaled $2 million with a weighted-average interest rate of 5.41% as of December 31, 2023 and $36 million with a weighted-average interest rate of 1.43% as of December 31, 2022. Interest expense related to this borrowing totaled $1 million for the year ended December 31, 2023.

Eastern Energy Gas has a $400 million intercompany revolving credit agreement from EGTS expiring in March 2025. The credit agreement has a variable interest rate based on SOFR plus a fixed spread. There were no amounts outstanding under the
credit agreement as of December 31, 2023 and 2022. Interest income related to this borrowing totaled $2,071 for the year ended December 31, 2021.
EGTS had also borrowed from Eastern Energy Gas pursuant to a series of long-term notes with fixed interest rates ranging from 3.6% to 5.0%, due 2024 to 2047. EGTS incurred interest charges related to these borrowings of $44 million for the year ended December 31, 2021. Refer to Note 8 for more information.