Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

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,
	2021		2020
Pension:
Service cost	$	7	$	3
Interest cost	20		23
Expected return on plan assets	(33)		(35)
Net amortization	6		9
Net periodic benefit cost	$	—	$	—
Other postretirement:
Service cost	$	2	$	1
Interest cost	5		6
Expected return on plan assets	(5)		(9)
Net amortization	(1)		(1)
Net periodic benefit cost (credit)	$	1	$	(3)

Foreign Operations

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

	Three-Month Periods
	Ended March 31,
	2021		2020
Service cost	$	4	$	4
Interest cost	8		10
Expected return on plan assets	(28)		(25)
Net amortization	14		10
Net periodic benefit credit	$	(2)	$	(1)

PacifiCorp [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

Net periodic benefit credit for the pension and other postretirement benefit plans included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2021		2020
Pension:
Service cost	$	—	$	—
Interest cost	7		9
Expected return on plan assets	(13)		(14)
Net amortization	5		5
Net periodic benefit credit	$	(1)	$	—
Other postretirement:
Service cost	$	—	$	—
Interest cost	2		3
Expected return on plan assets	(2)		(4)
Net amortization	—		—
Net periodic benefit credit	$	—	$	(1)

MidAmerican Energy Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

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,
	2021		2020
Pension:
Service cost	$	5	$	1
Interest cost	6		6
Expected return on plan assets	(9)		(10)
Net periodic benefit cost (credit)	$	2	$	(3)
Other postretirement:
Service cost	$	2	$	1
Interest cost	2		2
Expected return on plan assets	(2)		(3)
Net amortization	(1)		(1)
Net periodic benefit cost (credit)	$	1	$	(1)

Nevada Power Company [Member]

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,
	2021		2020
Qualified Pension Plan:
Other non-current assets	$	9	$	8
Non-Qualified Pension Plans:
Other current liabilities	(1)		(1)
Other long-term liabilities	(9)		(9)
Other Postretirement Plans:
Other non-current assets	4		4

Sierra Pacific Power Company [Member]

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,
	2021		2020
Qualified Pension Plan:
Other non-current assets	$	27	$	26
Non-Qualified Pension Plans:
Other current liabilities	(1)		(1)
Other long-term liabilities	(8)		(8)
Other Postretirement Plans:
Other long-term liabilities	(14)		(13)

Eastern Energy Gas Holdings, LLC [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs (Credits)

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,
	2021		2020
Pension:
Service cost	$	—	$	1
Interest cost	—		3
Expected return on plan assets	—		(14)
Net amortization	—		2
Net periodic benefit cost (credit)	$	—	$	(8)
Other Postretirement:
Service cost	$	—	$	1
Interest cost	—		1
Expected return on plan assets	—		(5)
Net amortization	—		(1)
Net periodic benefit cost (credit)	$	—	$	(4)