Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

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,
	2016			2015
Service cost	$	5		$	6
Interest cost	19			20
Expected return on plan assets	(29		)	(29		)
Net amortization	12			16
Net periodic benefit cost	$	7		$	13

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,
	2016			2015
Pension:
Service cost	$	8		$	8
Interest cost	31			30
Expected return on plan assets	(40		)	(42		)
Net amortization	11			13
Net periodic benefit cost	$	10		$	9
Other postretirement:
Service cost	$	3		$	4
Interest cost	8			7
Expected return on plan assets	(11		)	(12		)
Net amortization	(3		)	(3		)
Net periodic benefit credit	$	(3	)	$	(4	)

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,
	2016			2015
Pension:
Service cost	$	1		$	1
Interest cost	14			13
Expected return on plan assets	(19		)	(19		)
Net amortization	8			10
Net periodic benefit cost	$	4		$	5
Other postretirement:
Service cost	$	1		$	1
Interest cost	4			4
Expected return on plan assets	(6		)	(6		)
Net amortization	(1		)	(1		)
Net periodic benefit credit	$	(2	)	$	(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,
	2016			2015
Pension:
Service cost	$	3		$	3
Interest cost	8			8
Expected return on plan assets	(11		)	(11		)
Net periodic benefit cost	$	—		$	—
Other postretirement:
Service cost	$	1		$	2
Interest cost	2			2
Expected return on plan assets	(3		)	(4		)
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,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(40	)	$	(38	)
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(1		)
Other long-term liabilities	(9		)	(9		)
Other Postretirement Plans -
Other long-term liabilities	(5		)	(5		)

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,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(29	)	$	(29	)
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(1		)
Other long-term liabilities	(9		)	(9		)
Other Postretirement Plans -
Other long-term liabilities	(32		)	(32		)