Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 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						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016			2015
Service cost	$	5		$	6		$	16		$	18
Interest cost	17			20			55			60
Expected return on plan assets	(27		)	(29		)	(85		)	(87		)
Net amortization	11			17			34			49
Net periodic benefit cost	$	6		$	14		$	20		$	40

Domestic Operations

Net periodic benefit cost 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,
	2016			2015			2016			2015
Pension:
Service cost	$	7		$	8		$	22		$	24
Interest cost	31			30			94			91
Expected return on plan assets	(39		)	(42		)	(120		)	(127		)
Net amortization	12			13			36			41
Net periodic benefit cost	$	11		$	9		$	32		$	29
Other postretirement:
Service cost	$	2		$	2		$	7		$	8
Interest cost	7			6			23			22
Expected return on plan assets	(10		)	(10		)	(31		)	(33		)
Net amortization	(2		)	(1		)	(9		)	(7		)
Net periodic benefit credit	$	(3	)	$	(3	)	$	(10	)	$	(10	)

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						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016			2015
Pension:
Service cost	$	1		$	1		$	3		$	3
Interest cost	14			13			41			40
Expected return on plan assets	(18		)	(19		)	(56		)	(58		)
Net amortization	8			10			25			31
Net periodic benefit cost	$	5		$	5		$	13		$	16
Other postretirement:
Service cost	$	1		$	—		$	2		$	2
Interest cost	3			4			11			12
Expected return on plan assets	(5		)	(5		)	(16		)	(17		)
Net amortization	(1		)	(1		)	(4		)	(3		)
Net periodic benefit credit	$	(2	)	$	(2	)	$	(7	)	$	(6	)

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						Nine-Month Periods
	Ended September 30,						Ended September 30,
	2016			2015			2016			2015
Pension:
Service cost	$	3		$	3		$	8		$	9
Interest cost	8			8			25			24
Expected return on plan assets	(11		)	(11		)	(33		)	(34		)
Net amortization	—			—			1			1
Net periodic benefit cost	$	—		$	—		$	1		$	—
Other postretirement:
Service cost	$	1		$	2		$	4		$	5
Interest cost	2			1			7			6
Expected return on plan assets	(3		)	(4		)	(10		)	(11		)
Net amortization	(1		)	—			(3		)	(2		)
Net periodic benefit credit	$	(1	)	$	(1	)	$	(2	)	$	(2	)

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
	September 30,			December 31,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(7	)	$	(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
	September 30,			December 31,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(4	)	$	(29	)
Non-Qualified Pension Plans:
Other current liabilities	(1		)	(1		)
Other long-term liabilities	(8		)	(9		)
Other Postretirement Plans -
Other long-term liabilities	(32		)	(32		)