Risk Management and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2017

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of the Company's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

	Other					Other			Other
	Current			Other		Current			Long-term
	Assets			Assets		Liabilities			Liabilities			Total
As of March 31, 2017
Not designated as hedging contracts:
Commodity assets(1)	$	19		$	90	$	6		$	1		$	116
Commodity liabilities(1)	(4		)	—		(55		)	(157		)	(216		)
Interest rate assets	13			—		—			—			13
Interest rate liabilities	—			—		(5		)	(6		)	(11		)
Total	28			90		(54		)	(162		)	(98		)
Designated as hedging contracts:
Commodity assets	1			—		3			2			6
Commodity liabilities	—			—		(11		)	(18		)	(29		)
Interest rate assets	—			8		—			—			8
Interest rate liabilities	—			—		(4		)	—			(4		)
Total	1			8		(12		)	(16		)	(19		)
Total derivatives	29			98		(66		)	(178		)	(117		)
Cash collateral receivable	—			—		16			72			88
Total derivatives - net basis	$	29		$	98	$	(50	)	$	(106	)	$	(29	)

	Other					Other			Other
	Current			Other		Current			Long-term
	Assets			Assets		Liabilities			Liabilities			Total
As of December 31, 2016
Not designated as hedging contracts:
Commodity assets(1)	$	42		$	86	$	5		$	2		$	135
Commodity liabilities(1)	(10		)	—		(46		)	(150		)	(206		)
Interest rate assets	15			—		—			—			15
Interest rate liabilities	—			—		(4		)	(6		)	(10		)
Total	47			86		(45		)	(154		)	(66		)
Designated as hedging contracts:
Commodity assets	1			—		2			3			6
Commodity liabilities	—			—		(14		)	(8		)	(22		)
Interest rate assets	—			8		—			—			8
Interest rate liabilities	—			—		(3		)	—			(3		)
Total	1			8		(15		)	(5		)	(11		)
Total derivatives	48			94		(60		)	(159		)	(77		)
Cash collateral receivable	—			—		13			61			74
Total derivatives - net basis	$	48		$	94	$	(47	)	$	(98	)	$	(3	)

(1) The Company's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of March 31, 2017 and December 31, 2016, a net regulatory asset of $180 million and $148 million, respectively, was recorded related to the net derivative liability of $100 million and $71 million, respectively. The difference between the net regulatory asset and the net derivative liability relates primarily to a power purchase agreement derivative at BHE Renewables.

Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts

The following table reconciles the beginning and ending balances of the Company's net regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in net regulatory assets, as well as amounts reclassified to earnings (in millions):

	Three-Month Periods
	Ended March 31,
	2017			2016
Beginning balance	$	148		$	250
Changes in fair value recognized in net regulatory assets	33			36
Net gains reclassified to operating revenue	13			—
Net losses reclassified to cost of sales	(14		)	(33		)
Ending balance	$	180		$	253

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)

The following table reconciles the beginning and ending balances of the Company's accumulated other comprehensive (income) loss (pre-tax) and summarizes pre-tax gains and losses on commodity derivative contracts designated and qualifying as cash flow hedges recognized in OCI, as well as amounts reclassified to earnings (in millions):

	Three-Month Periods
	Ended March 31,
	2017			2016
Beginning balance	$	16		$	46
Changes in fair value recognized in OCI	16			48
Net losses reclassified to cost of sales	(9		)	(22		)
Ending balance	$	23		$	72

Schedule of Notional Amounts of Outstanding Derivative Positions

The following table summarizes the net notional amounts of outstanding derivative contracts with fixed price terms that comprise the mark-to-market values as of (in millions):

	Unit of	March 31,		December 31,
	Measure	2017		2016
Electricity purchases	Megawatt hours	10		5
Natural gas purchases	Decatherms	305		271
Fuel purchases	Gallons	8		11
Interest rate swaps	US$	814		714
Mortgage sale commitments, net	US$	(143	)	(309	)

PacifiCorp [Member]

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table, which reflects master netting arrangements and excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of PacifiCorp's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

	Other					Other			Other
	Current			Other		Current			Long-term
	Assets			Assets		Liabilities			Liabilities			Total
As of March 31, 2017
Not designated as hedging contracts(1):
Commodity assets	$	7		$	—	$	5		$	—		$	12
Commodity liabilities	(1		)	—		(27		)	(91		)	(119		)
Total	6			—		(22		)	(91		)	(107		)
Total derivatives	6			—		(22		)	(91		)	(107		)
Cash collateral receivable	—			—		13			63			76
Total derivatives - net basis	$	6		$	—	$	(9	)	$	(28	)	$	(31	)
As of December 31, 2016
Not designated as hedging contracts(1):
Commodity assets	$	24		$	2	$	1		$	—		$	27
Commodity liabilities	(6		)	—		(14		)	(84		)	(104		)
Total	18			2		(13		)	(84		)	(77		)
Total derivatives	18			2		(13		)	(84		)	(77		)
Cash collateral receivable	—			—		10			59			69
Total derivatives - net basis	$	18		$	2	$	(3	)	$	(25	)	$	(8	)

(1) PacifiCorp's commodity derivatives are generally included in rates and as of March 31, 2017 and December 31, 2016, a regulatory asset of $103 million and $73 million, respectively, was recorded related to the net derivative liability of $107 million and $77 million, respectively.

Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts

The following table reconciles the beginning and ending balances of PacifiCorp's net regulatory assets and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in net regulatory assets, as well as amounts reclassified to earnings (in millions):

	Three-Month Periods
	Ended March 31,
	2017			2016
Beginning balance	$	73		$	133
Changes in fair value recognized in net regulatory assets	24			26
Net gains reclassified to operating revenue	12			8
Net losses reclassified to energy costs	(6		)	(23		)
Ending balance	$	103		$	144

Schedule of Notional Amounts of Outstanding Derivative Positions

The following table summarizes the net notional amounts of outstanding commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of (in millions):

	Unit of	March 31,	December 31,
	Measure	2017	2016
Electricity (sales) purchases	Megawatt hours	—	(3	)
Natural gas purchases	Decatherms	82	84
Fuel oil purchases	Gallons	8	11

Nevada Power Company [Member]

Derivative [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table, which excludes contracts that have been designated as normal under the normal purchases or normal sales exception afforded by GAAP, summarizes the fair value of Nevada Power's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

	Other			Other
	Current			Long-term
	Liabilities			Liabilities			Total
As of March 31, 2017
Commodity liabilities(1)	$	(7	)	$	(7	)	$	(14	)
As of December 31, 2016
Commodity liabilities(1)	$	(7	)	$	(7	)	$	(14	)

(1) Nevada Power's commodity derivatives not designated as hedging contracts are included in regulated rates and as of March 31, 2017 and December 31, 2016, a regulatory asset of $14 million was recorded related to the derivative liability of $14 million.

Schedule of Notional Amounts of Outstanding Derivative Positions

The following table summarizes the net notional amounts of outstanding derivative contracts with indexed and fixed price terms that comprise the mark-to-market values (in millions):

		As of
	Unit of	March 31,		December 31,
	Measure	2017		2016
Electricity sales	Megawatt hours	(1	)	(2	)
Natural gas purchases	Decatherms	147		114