Employee Benefit Plans (Tables)

6 Months Ended

Jun. 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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2016			2015			2016			2015
Service cost	$	6		$	6		$	11		$	12
Interest cost	19			20			38			40
Expected return on plan assets	(29		)	(29		)	(58		)	(58		)
Net amortization	11			16			23			32
Net periodic benefit cost	$	7		$	13		$	14		$	26

Domestic Operations

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

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2016			2015			2016			2015
Pension:
Service cost	$	7		$	8		$	15		$	16
Interest cost	32			31			63			61
Expected return on plan assets	(41		)	(43		)	(81		)	(85		)
Net amortization	13			15			24			28
Net periodic benefit cost	$	11		$	11		$	21		$	20
Other postretirement:
Service cost	$	2		$	2		$	5		$	6
Interest cost	8			9			16			16
Expected return on plan assets	(10		)	(11		)	(21		)	(23		)
Net amortization	(4		)	(3		)	(7		)	(6		)
Net periodic benefit credit	$	(4	)	$	(3	)	$	(7	)	$	(7	)

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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2016			2015			2016			2015
Pension:
Service cost	$	1		$	1		$	2		$	2
Interest cost	13			14			27			27
Expected return on plan assets	(19		)	(20		)	(38		)	(39		)
Net amortization	9			11			17			21
Net periodic benefit cost	$	4		$	6		$	8		$	11
Other postretirement:
Service cost	$	—		$	1		$	1		$	2
Interest cost	4			4			8			8
Expected return on plan assets	(5		)	(6		)	(11		)	(12		)
Net amortization	(2		)	(1		)	(3		)	(2		)
Net periodic benefit credit	$	(3	)	$	(2	)	$	(5	)	$	(4	)

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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2016			2015			2016			2015
Pension:
Service cost	$	2		$	3		$	5		$	6
Interest cost	9			8			17			16
Expected return on plan assets	(11		)	(12		)	(22		)	(23		)
Net amortization	1			1			1			1
Net periodic benefit cost	$	1		$	—		$	1		$	—
Other postretirement:
Service cost	$	2		$	1		$	3		$	3
Interest cost	3			3			5			5
Expected return on plan assets	(4		)	(3		)	(7		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
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
	June 30,			December 31,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(41	)	$	(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
	June 30,			December 31,
	2016			2015
Qualified Pension Plan -
Other long-term liabilities	$	(30	)	$	(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		)