Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2017			2016			2017			2016
Service cost	$	7		$	6		$	13		$	11
Interest cost	15			19			29			38
Expected return on plan assets	(25		)	(29		)	(49		)	(58		)
Net amortization	16			11			33			23
Net periodic benefit cost	$	13		$	7		$	26		$	14

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,
	2017			2016			2017			2016
Pension:
Service cost	$	6		$	7		$	12		$	15
Interest cost	29			32			58			63
Expected return on plan assets	(40		)	(41		)	(80		)	(81		)
Net amortization	8			13			15			24
Net periodic benefit cost	$	3		$	11		$	5		$	21
Other postretirement:
Service cost	$	2		$	2		$	4		$	5
Interest cost	8			8			14			16
Expected return on plan assets	(11		)	(10		)	(21		)	(21		)
Net amortization	(4		)	(4		)	(7		)	(7		)
Net periodic benefit credit	$	(5	)	$	(4	)	$	(10	)	$	(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,
	2017			2016			2017			2016
Pension:
Service cost	$	—		$	1		$	—		$	2
Interest cost	13			13			25			27
Expected return on plan assets	(18		)	(19		)	(36		)	(38		)
Net amortization	3			9			7			17
Net periodic benefit (credit) cost	$	(2	)	$	4		$	(4	)	$	8
Other postretirement:
Service cost	$	—		$	—		$	1		$	1
Interest cost	4			4			7			8
Expected return on plan assets	(5		)	(5		)	(11		)	(11		)
Net amortization	(2		)	(2		)	(3		)	(3		)
Net periodic benefit credit	$	(3	)	$	(3	)	$	(6	)	$	(5	)

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,
	2017			2016			2017			2016
Pension:
Service cost	$	3		$	2		$	5		$	5
Interest cost	7			9			15			17
Expected return on plan assets	(11		)	(11		)	(22		)	(22		)
Net amortization	1			1			1			1
Net periodic benefit cost (credit)	$	—		$	1		$	(1	)	$	1
Other postretirement:
Service cost	$	1		$	2		$	2		$	3
Interest cost	2			3			4			5
Expected return on plan assets	(4		)	(4		)	(7		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit credit	$	(2	)	$	—		$	(3	)	$	(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,
	2017			2016
Qualified Pension Plan -
Other long-term liabilities	$	(26	)	$	(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
	June 30,			December 31,
	2017			2016
Qualified Pension Plan -
Other long-term liabilities	$	(13	)	$	(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		)