Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 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				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2023		2022		2023		2022
Pension:
Service cost	$	3	$	7	$	12	$	20
Interest cost	27		20		82		58
Expected return on plan assets	(30)		(28)		(92)		(82)
Settlement	—		—		(5)		2
Net amortization	4		4		11		13
Net periodic benefit cost	$	4	$	3	$	8	$	11
Other postretirement:
Service cost	$	3	$	2	$	6	$	8
Interest cost	8		5		22		15
Expected return on plan assets	(7)		(8)		(25)		(22)
Net amortization	(1)		—		(2)		(1)
Net periodic benefit cost (credit)	$	3	$	(1)	$	1	$	—

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

	Three-Month Periods				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2023		2022		2023		2022
Service cost	$	2	$	3	$	5	$	10
Interest cost	14		8		42		27
Expected return on plan assets	(20)		(22)		(60)		(70)
Net amortization	7		6		20		18
Net periodic benefit cost (credit)	$	3	$	(5)	$	7	$	(15)

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				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2023		2022		2023		2022
Pension:
Interest cost	$	10	$	8	$	29	$	22
Expected return on plan assets	(12)		(11)		(36)		(32)
Net amortization	3		4		9		12
Net periodic benefit cost	$	1	$	1	$	2	$	2
Other postretirement:
Service cost	$	—	$	—	$	1	$	1
Interest cost	3		2		8		6
Expected return on plan assets	(3)		(3)		(10)		(8)
Net amortization	(1)		1		(2)		1
Net periodic benefit credit	$	(1)	$	—	$	(3)	$	—

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				Nine-Month Periods
	Ended September 30,				Ended September 30,
	2023		2022		2023		2022
Pension:
Service cost	$	2	$	5	$	8	$	14
Interest cost	8		5		24		15
Expected return on plan assets	(7)		(7)		(23)		(21)
Settlement	—		—		(5)		2
Net amortization	—		—		—		1
Net periodic benefit cost	$	3	$	3	$	4	$	11
Other postretirement:
Service cost	$	2	$	2	$	4	$	6
Interest cost	4		2		10		6
Expected return on plan assets	(3)		(4)		(11)		(11)
Net amortization	—		(1)		—		(2)
Net periodic benefit cost (credit)	$	3	$	(1)	$	3	$	(1)

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
	September 30,		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
	September 30,		December 31,
	2023		2022
Qualified Pension Plan:
Other non-current assets	$	45	$	43
Non-Qualified Pension Plans:
Other current liabilities	(1)		(1)
Other long-term liabilities	(5)		(5)
Other Postretirement Plans:
Other non-current assets	1		—
Other long-term liabilities	—		(2)