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Employee Benefit Plans
 3 Months Ended
Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans
Domestic Operations

Net periodic benefit cost (credit) for the domestic pension and other postretirement benefit plans included the following components (in millions):
 Three-Month Periods
Ended March 31,
 20232022
Pension:
Service cost$4 $7 
Interest cost28 19 
Expected return on plan assets(31)(27)
Settlement(5)2 
Net amortization4 4 
Net periodic benefit cost$— $5 
Other postretirement:
Service cost$1 $2 
Interest cost7 5 
Expected return on plan assets(8)(7)
Net amortization(1)— 
Net periodic benefit (credit) cost$(1)$— 

Amounts other than the service cost for pension and other postretirement benefit plans are recorded in other, net on the Consolidated Statements of Operations. Employer contributions to the domestic pension and other postretirement benefit plans are expected to be $13 million and $7 million, respectively, during 2023. As of March 31, 2023, $3 million and $1 million of contributions had been made to the domestic pension and other postretirement benefit plans, respectively.
Foreign Operations

Net periodic benefit cost (credit) for the United Kingdom pension plan included the following components (in millions):
Three-Month Periods
Ended March 31,
 20232022
 
Service cost$2 $4 
Interest cost14 10 
Expected return on plan assets(19)(25)
Net amortization6 6 
Net periodic benefit cost (credit)$3 $(5)

Amounts other than the service cost for the United Kingdom pension plan are recorded in other, net on the Consolidated Statements of Operations. Employer contributions to the United Kingdom pension plan are expected to be £11 million during 2023. As of March 31, 2023, £3 million, or $4 million, of contributions had been made to the United Kingdom pension plan.
PAC  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans
Net periodic benefit cost (credit) for the pension and other postretirement benefit plans included the following components (in millions):
Three-Month Periods
Ended March 31,
20232022
Pension:
Interest cost$10 $7 
Expected return on plan assets(12)(10)
Net amortization3 4 
Net periodic benefit cost$1 $1 
Other postretirement:
Service cost$— $— 
Interest cost3 2 
Expected return on plan assets(3)(2)
Net amortization(1)— 
Net periodic benefit credit$(1)$— 
Amounts other than the service cost for pension and other postretirement benefit plans are recorded in other, net on the Consolidated Statements of Operations. Employer contributions to the pension and other postretirement benefit plans are expected to be $4 million and $— million, respectively, during 2023. As of March 31, 2023, $1 million of contributions had been made to the pension plans.
MEC  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans
MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc.

Net periodic benefit cost (credit) for the plans of MidAmerican Energy and the aforementioned affiliates included the following components (in millions):
Three-Month Periods
Ended March 31,
20232022
Pension:
Service cost$3 $5 
Interest cost8 5 
Expected return on plan assets(8)(7)
Settlement(5)2 
Net periodic benefit cost (credit)$(2)$5 
Other postretirement:
Service cost$1 $2 
Interest cost3 2 
Expected return on plan assets(4)(4)
Net periodic benefit cost (credit)$— $— 

Amounts other than the service cost for pension and other postretirement benefit plans are recorded in Other, net in the Statements of Operations. Employer contributions to the pension and other postretirement benefit plans during 2023 are expected to be $7 million and $2 million, respectively. As of March 31, 2023, $2 million and $1 million of contributions had been made to the pension and other postretirement benefit plans, respectively.
MidAmerican Funding, LLC  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit PlansRefer to Note 5 of MidAmerican Energy's Notes to Financial Statements.
NPC  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans
Nevada Power is a participant in benefit plans sponsored by NV Energy. The NV Energy Retirement Plan includes a qualified pension plan ("Qualified Pension Plan") and a supplemental executive retirement plan and a restoration plan (collectively, "Non‑Qualified Pension Plans") that provide pension benefits for eligible employees. The NV Energy Comprehensive Welfare Benefit and Cafeteria Plan provides certain postretirement health care and life insurance benefits for eligible retirees ("Other Postretirement Plans") on behalf of Nevada Power. Amounts attributable to Nevada Power were allocated from NV Energy based upon the current, or in the case of retirees, previous, employment location. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net.

Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions):
As of
March 31,December 31,
20232022
Qualified Pension Plan:
Other non-current assets$26 $27 
Non-Qualified Pension Plans:
Other current liabilities(1)(1)
Other long-term liabilities(6)(6)
Other Postretirement Plans:
Other non-current assets7 7 
SPPC  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans
Sierra Pacific is a participant in benefit plans sponsored by NV Energy. The NV Energy Retirement Plan includes a qualified pension plan ("Qualified Pension Plan") and a supplemental executive retirement plan and a restoration plan (collectively, "Non‑Qualified Pension Plans") that provide pension benefits for eligible employees. The NV Energy Comprehensive Welfare Benefit and Cafeteria Plan provides certain postretirement health care and life insurance benefits for eligible retirees ("Other Postretirement Plans") on behalf of Sierra Pacific. Amounts attributable to Sierra Pacific were allocated from NV Energy based upon the current, or in the case of retirees, previous, employment location. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net.

Amounts receivable from (payable to) NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions):
As of
March 31,December 31,
20232022
Qualified Pension Plan:
Other non-current assets$44 $43 
Non-Qualified Pension Plans:
Other current liabilities(1)(1)
Other long-term liabilities(5)(5)
Other Postretirement Plans:
Other long-term liabilities(2)(2)
EEGH  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit PlansEastern Energy Gas is a participant in benefit plans sponsored by MidAmerican Energy Company ("MidAmerican Energy"), an affiliate. The MidAmerican Energy Company Retirement Plan includes a qualified pension plan that provides pension benefits for eligible employees. The MidAmerican Energy Company Welfare Benefit Plan provides certain postretirement health care and life insurance benefits for eligible retirees on behalf of Eastern Energy Gas. Eastern Energy Gas contributed $2 million and $3 million to the MidAmerican Energy Company Retirement Plan for the three-month periods ended March 31, 2023 and 2022, respectively, and $1 million to the MidAmerican Energy Company Welfare Benefit Plan for the three-month periods ended March 31, 2023 and 2022. Contributions related to these plans are reflected as net periodic benefit cost in operations and maintenance expense on the Consolidated Statements of Operations. Amounts attributable to Eastern Energy Gas were allocated from MidAmerican Energy in accordance with the intercompany administrative service agreement. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. Net periodic benefit costs not included in regulated rates are included in accumulated other comprehensive loss, net. As of March 31, 2023 and December 31, 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 $51 million.
EGTS  
Defined Benefit Plan Disclosure [Line Items]  
Employee Benefit Plans Employee Benefit Plans EGTS is a participant in benefit plans sponsored by MidAmerican Energy Company ("MidAmerican Energy"), an affiliate. The MidAmerican Energy Company Retirement Plan includes a qualified pension plan that provides pension benefits for eligible employees. The MidAmerican Energy Company Welfare Benefit Plan provides certain postretirement health care and life insurance benefits for eligible retirees on behalf of EGTS. EGTS contributed $2 million and $3 million to the MidAmerican Energy Company Retirement Plan for the three-month periods ended March 31, 2023 and 2022, respectively, and $1 million to the MidAmerican Energy Company Welfare Benefit Plan for the three-month period ended March 31, 2022. Contributions related to these plans are reflected as net periodic benefit cost in operations and maintenance expense on the Consolidated Statements of Operations. Amounts attributable to EGTS were allocated from MidAmerican Energy in accordance with the intercompany administrative service agreement. Offsetting regulatory assets and liabilities have been recorded related to the amounts not yet recognized as a component of net periodic benefit costs that will be included in regulated rates. As of March 31, 2023 and December 31, 2022, EGTS' amount due to MidAmerican Energy associated with these plans and reflected in other long-term liabilities on the Consolidated Balance Sheets was $47 million.