Risk Management and Hedging Activities (MEC) (MidAmerican Energy Company and Subsidiaries [Member])

12 Months Ended

Dec. 31, 2012

MidAmerican Energy Company and Subsidiaries [Member]

Derivatives, Fair Value [Line Items]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(13) Risk Management and Hedging Activities

MidAmerican Energy is exposed to the impact of market fluctuations in commodity prices and interest rates. MidAmerican Energy is principally exposed to electricity, natural gas, coal and fuel oil commodity price risk as it has an obligation to serve retail customer load in its regulated service territory. MidAmerican Energy also provides nonregulated retail electricity and natural gas services in competitive markets. MidAmerican Energy's load and generating facilities represent substantial underlying commodity positions. Exposures to commodity prices consist mainly of variations in the price of fuel required to generate electricity, wholesale electricity that is purchased and sold, and natural gas supply for retail customers. Commodity prices are subject to wide price swings as supply and demand are impacted by, among many other unpredictable items, weather; market liquidity; generating facility availability; customer usage; storage; and transmission and transportation constraints. Interest rate risk exists on variable-rate debt and future debt issuances. MidAmerican Energy does not engage in a material amount of proprietary trading activities.

MidAmerican Energy has established a risk management process that is designed to identify, assess, monitor, report, manage and mitigate each of the various types of risk involved in its business. To mitigate a portion of its commodity price risk, MidAmerican Energy uses commodity derivative contracts, which may include forwards, futures, options, swaps and other agreements, to effectively secure future supply or sell future production generally at fixed prices. MidAmerican Energy manages its interest rate risk by limiting its exposure to variable interest rates primarily through the issuance of fixed-rate long-term debt and by monitoring market changes in interest rates. Additionally, MidAmerican Energy may from time to time enter into interest rate derivative contracts, such as interest rate swaps or locks, to mitigate its exposure to interest rate risk. MidAmerican Energy does not hedge all of its commodity price and interest rate risks, thereby exposing the unhedged portion to changes in market prices.

There have been no significant changes in MidAmerican Energy's accounting policies related to derivatives. Refer to Notes 2 and 14 for additional information on derivative contracts.

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 MidAmerican Energy'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):

	Current			Other			Current			Other
	Assets			Assets			Liabilities			Liabilities
	- Other			- Other			- Other			- Other			Total
As of As of December 31, 2012
Not designated as hedging contracts(1):
Commodity assets	$	18		$	1		$	7		$	2		$	28
Commodity liabilities	(12		)	—			(47		)	(14		)	(73		)
Total	6			1			(40		)	(12		)	(45		)
Designated as hedging contracts:
Commodity assets	—			—			1			1			2
Commodity liabilities	—			—			(22		)	(12		)	(34		)
Total	—			—			(21		)	(11		)	(32		)
Total derivatives	6			1			(61		)	(23		)	(77		)
Cash collateral receivable	—			—			6			1			7
Total derivatives - net basis	$	6		$	1		$	(55	)	$	(22	)	$	(70	)
As of As of December 31, 2011
Not designated as hedging contracts(1):
Commodity assets	$	60		$	6		$	6		$	1		$	73
Commodity liabilities	(29		)	(2		)	(73		)	(41		)	(145		)
Total	31			4			(67		)	(40		)	(72		)
Designated as hedging contracts:
Commodity assets	—			—			1			—			1
Commodity liabilities	(6		)	—			(21		)	(17		)	(44		)
Total	(6		)	—			(20		)	(17		)	(43		)
Total derivatives	25			4			(87		)	(57		)	(115		)
Cash collateral receivable	—			—			28			5			33
Total derivatives - net basis	$	25		$	4		$	(59	)	$	(52	)	$	(82	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates. Accordingly, as of December 31, 2012 and 2011, a net regulatory asset of $45 million and $73 million, respectively, was recorded related to the net derivative liability of $45 million and $72 million, respectively.

Not Designated as Hedging Contracts

The following table reconciles the beginning and ending balances of MidAmerican Energy's net regulatory assets (liabilities) and summarizes the pre-tax gains and losses on commodity derivative contracts recognized in net regulatory assets (liabilities), as well as amounts reclassified to earnings for the years ended December 31 (in millions):

	2012			2011			2010
Beginning balance	$	73		$	27		$	(14	)
Changes in fair value recognized in net regulatory assets (liabilities)	14			76			23
Net gains reclassified to operating revenue	21			—			16
Net gains reclassified to cost of fuel, energy and capacity	2			8			18
Net losses reclassified to cost of gas sold	(65		)	(38		)	(16		)
Ending balance	$	45		$	73		$	27

The following table summarizes the pre-tax gains (losses) included on the Consolidated Statements of Operations associated with MidAmerican Energy's derivative contracts not designated as hedging contracts and not recorded as a net regulatory asset or liability for the years ended December 31 (in millions):

	2012			2011			2010
Nonregulated operating revenue	$	8		$	18		$	20
Regulated cost of gas sold	—			—			3
Nonregulated cost of sales	(4		)	(13		)	(15		)
Total	$	4		$	5		$	8

Designated as Hedging Contracts

MidAmerican Energy uses derivative contracts accounted for as cash flow hedges to hedge electricity and natural gas commodity prices for delivery to nonregulated customers.

The following table reconciles the beginning and ending balances of MidAmerican Energy's accumulated other comprehensive loss (pre-tax) and summarizes pre-tax gains and losses on derivative contracts designated and qualifying as cash flow hedges recognized in OCI, as well as amounts reclassified to earnings, for the years ended December 31 (in millions):

	2012			2011			2010
Beginning balance	$	43		$	34		$	63
Net losses recognized in OCI	27			27			14
Net losses reclassified to nonregulated cost of sales	(38		)	(18		)	(43		)
Ending balance	$	32		$	43		$	34

Realized gains and losses on hedges and hedge ineffectiveness are recognized in income as nonregulated operating revenue or nonregulated cost of sales depending upon the nature of the item being hedged. For the years ended December 31, 2012, 2011 and 2010, hedge ineffectiveness was insignificant. As of December 31, 2012, MidAmerican Energy had cash flow hedges with expiration dates extending through December 2016, and $21 million of pre-tax net unrealized losses are forecasted to be reclassified from AOCI into earnings over the next twelve months as contracts settle.

Derivative Contract Volumes

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 December 31 (in millions):

	Unit of
	Measure	2012	2011
Electricity purchases	Megawatt hours	5	8
Natural gas purchases	Decatherms	36	62
Fuel purchases	Gallons	—	2

Credit Risk

MidAmerican Energy extends unsecured credit to other utilities, energy marketing companies, financial institutions and other market participants in conjunction with its wholesale energy supply and marketing activities. Credit risk relates to the risk of loss that might occur as a result of nonperformance by counterparties on their contractual obligations to make or take delivery of electricity, natural gas or other commodities and to make financial settlements of these obligations. Credit risk may be concentrated to the extent that one or more groups of counterparties have similar economic, industry or other characteristics that would cause their ability to meet contractual obligations to be similarly affected by changes in market or other conditions. In addition, credit risk includes not only the risk that a counterparty may default due to circumstances relating directly to it, but also the risk that a counterparty may default due to circumstances involving other market participants that have a direct or indirect relationship with the counterparty.

MidAmerican Energy analyzes the financial condition of each significant wholesale counterparty before entering into any transactions, establishes limits on the amount of unsecured credit to be extended to each counterparty and evaluates the appropriateness of unsecured credit limits on an ongoing basis. To mitigate exposure to the financial risks of wholesale counterparties, MidAmerican Energy enters into netting and collateral arrangements that may include margining and cross-product netting agreements and obtains third-party guarantees, letters of credit and cash deposits. Counterparties may be assessed fees for delayed payments. If required, MidAmerican Energy exercises rights under these arrangements, including calling on the counterparty's credit support arrangement.

MidAmerican Energy also has potential indirect credit exposure to other market participants in the regional transmission organization ("RTO") markets where it actively participates, including the Midwest Independent Transmission System Operator, Inc. and the PJM Interconnection, L.L.C. In the event of a default by a RTO market participant on its market-related obligations, losses are allocated among all other market participants in proportion to each participant's share of overall market activity during the period of time the loss was incurred, diversifying MidAmerican Energy's exposure to credit losses from individual participants. Transactional activities of MidAmerican Energy and other participants in organized RTO markets are governed by credit policies specified in each respective RTO's governing tariff or related business practices. Credit policies of RTO's, which have been developed through extensive stakeholder participation, generally seek to minimize potential loss in the event of a market participant default without unnecessarily inhibiting access to the marketplace. MidAmerican Energy's share of historical losses from defaults by other RTO market participants has not been material.

Collateral and Contingent Features

In accordance with industry practice, certain wholesale derivative contracts contain provisions that require MidAmerican Energy to maintain specific credit ratings from one or more of the major credit rating agencies on its senior unsecured debt. These derivative contracts may either specifically provide bilateral rights to demand cash or other security if credit exposures on a net basis exceed specified rating-dependent threshold levels ("credit-risk-related contingent features") or provide the right for counterparties to demand "adequate assurance" in the event of a material adverse change in MidAmerican Energy's creditworthiness. These rights can vary by contract and by counterparty. As of December 31, 2012, MidAmerican Energy's credit ratings from thethree recognized credit rating agencies were investment grade.

The aggregate fair value of MidAmerican Energy's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $84 million and $122 million as of December 31, 2012 and 2011, respectively, for which MidAmerican Energy had posted collateral of $- million. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of December 31, 2012 and 2011, MidAmerican Energy would have been required to post $72 million and $109 million, respectively, of additional collateral. MidAmerican Energy's collateral requirements could fluctuate considerably due to market price volatility, changes in credit ratings, changes in legislation or regulation, or other factors.