Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2023

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

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,
	2023		2022
Pension:
Service cost	$	4	$	7
Interest cost	28		19
Expected return on plan assets	(31)		(27)
Settlement	(5)		2
Net amortization	4		4
Net periodic benefit cost	$	—	$	5
Other postretirement:
Service cost	$	1	$	2
Interest cost	7		5
Expected return on plan assets	(8)		(7)
Net amortization	(1)		—
Net periodic benefit (credit) cost	$	(1)	$	—

Net periodic benefit cost (credit) for the United Kingdom pension plan included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2023		2022
Service cost	$	2	$	4
Interest cost	14		10
Expected return on plan assets	(19)		(25)
Net amortization	6		6
Net periodic benefit cost (credit)	$	3	$	(5)

PAC

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

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,
	2023		2022
Pension:
Interest cost	$	10	$	7
Expected return on plan assets	(12)		(10)
Net amortization	3		4
Net periodic benefit cost	$	1	$	1
Other postretirement:
Service cost	$	—	$	—
Interest cost	3		2
Expected return on plan assets	(3)		(2)
Net amortization	(1)		—
Net periodic benefit credit	$	(1)	$	—

MEC

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs

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,
	2023		2022
Pension:
Service cost	$	3	$	5
Interest cost	8		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 cost	3		2
Expected return on plan assets	(4)		(4)
Net periodic benefit cost (credit)	$	—	$	—

NPC

Defined Benefit Plan Disclosure [Line Items]

Schedule of Amounts Recognized in Balance Sheet

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,
	2023		2022
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 assets	7		7

SPPC

Defined Benefit Plan Disclosure [Line Items]

Schedule of Amounts Recognized in Balance Sheet

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,
	2023		2022
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)