Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2017

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

Foreign Operations

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

	Three-Month Periods
	Ended March 31,
	2017			2016
Service cost	$	6		$	5
Interest cost	14			19
Expected return on plan assets	(24		)	(29		)
Net amortization	17			12
Net periodic benefit cost	$	13		$	7

Domestic Operations

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

	Three-Month Periods
	Ended March 31,
	2017			2016
Pension:
Service cost	$	6		$	8
Interest cost	29			31
Expected return on plan assets	(40		)	(40		)
Net amortization	7			11
Net periodic benefit cost	$	2		$	10
Other postretirement:
Service cost	$	2		$	3
Interest cost	6			8
Expected return on plan assets	(10		)	(11		)
Net amortization	(3		)	(3		)
Net periodic benefit credit	$	(5	)	$	(3	)

PacifiCorp [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

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

	Three-Month Periods
	Ended March 31,
	2017			2016
Pension:
Service cost	$	—		$	1
Interest cost	12			14
Expected return on plan assets	(18		)	(19		)
Net amortization	4			8
Net periodic benefit cost	$	(2	)	$	4
Other postretirement:
Service cost	$	1		$	1
Interest cost	3			4
Expected return on plan assets	(6		)	(6		)
Net amortization	(1		)	(1		)
Net periodic benefit credit	$	(3	)	$	(2	)

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,
	2017			2016
Pension:
Service cost	$	2		$	3
Interest cost	8			8
Expected return on plan assets	(11		)	(11		)
Net periodic benefit credit	$	(1	)	$	—
Other postretirement:
Service cost	$	1		$	1
Interest cost	2			2
Expected return on plan assets	(3		)	(3		)
Net amortization	(1		)	(1		)
Net periodic benefit credit	$	(1	)	$	(1	)

Nevada Power Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Amounts Recognized in Balance Sheet

Amounts payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions):

	As of
	March 31,			December 31,
	2017			2016
Qualified Pension Plan -
Other long-term liabilities	$	(25	)	$	(24	)
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(1		)
Other long-term liabilities	(9		)	(9		)
Other Postretirement Plans -
Other long-term liabilities	(4		)	(4		)

Sierra Pacific Power Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Amounts Recognized in Balance Sheet

Amounts payable to NV Energy are included on the Consolidated Balance Sheets and consist of the following (in millions):

	As of
	March 31,			December 31,
	2017			2016
Qualified Pension Plan -
Other long-term liabilities	$	(12	)	$	(12	)
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(1		)
Other long-term liabilities	(9		)	(9		)
Other Postretirement Plans -
Other long-term liabilities	(24		)	(28		)