10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

[X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2013

or

[  ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from _________to _________

Commission	Exact name of registrant as specified in its charter;	IRS Employer
File Number	State or other jurisdiction of incorporation or organization	Identification No.
333-90553	MIDAMERICAN FUNDING, LLC	47-0819200
	(An Iowa Limited Liability Company)
	666 Grand Avenue, Suite 500
	Des Moines, Iowa 50309-2580
333-15387	MIDAMERICAN ENERGY COMPANY	42-1425214
	(An Iowa Corporation)
	666 Grand Avenue, Suite 500
	Des Moines, Iowa 50309-2580
(515) 242-4300
(Registrant's telephone number, including area code)
N/A
(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

MidAmerican Funding, LLC Yes £ No S MidAmerican Energy Company Yes S  No £

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

MidAmerican Funding, LLC Yes S No £ MidAmerican Energy Company Yes S  No £

Indicate by check mark whether the registrants are large accelerated filers, accelerated filers, non-accelerated filers or smaller reporting companies. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer £ Accelerated filer £ Non-accelerated filer S Smaller reporting company £

Indicate by check mark whether either registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes  £            No  S

All of the member's equity of MidAmerican Funding, LLC was held by its parent company, MidAmerican Energy Holdings Company as of July 31, 2013.

All common stock of MidAmerican Energy Company is held by its parent company, MHC Inc., which is a direct, wholly owned subsidiary of MidAmerican Funding, LLC. As of July 31, 2013, 70,980,203 shares of MidAmerican Energy Company common stock, without par value, were outstanding.

MidAmerican Funding, LLC and MidAmerican Energy Company separately file this combined Form 10-Q. Information relating to each individual registrant is filed by such registrant on its own behalf. MidAmerican Energy Company makes no representation as to information relating to any other subsidiary of MidAmerican Funding, LLC.

TABLE OF CONTENTS

PART I

Item 1.	Financial Statements	1
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	41
Item 4.	Controls and Procedures	41
PART II
Item 1.	Legal Proceedings	42
Item 1A.	Risk Factors	42
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	42
Item 3.	Defaults Upon Senior Securities	42
Item 4.	Mine Safety Disclosures	42
Item 5.	Other Information	42
Item 6.	Exhibits	42
Signatures		43
Exhibit Index		44

i

Definition of Abbreviations and Industry Terms

When used in Forward-Looking Statements, Part I - Items 2 through 4, and Part II - Items 1 through 6, the following terms have the definitions indicated.

Companies
MEHC	MidAmerican Energy Holdings Company
MidAmerican Funding	MidAmerican Funding, LLC
MidAmerican Energy	MidAmerican Energy Company
Berkshire Hathaway	Berkshire Hathaway Inc. and its subsidiaries
Certain Industry Terms
AFUDC	Allowance for Funds Used During Construction
DSM	Demand-side Management
Dth	Decatherms
EPA	United States Environmental Protection Agency
FERC	Federal Energy Regulatory Commission
GHG	Greenhouse Gases
GWh	Gigawatt Hours
IUB	Iowa Utilities Board
MW	Megawatts

Forward-Looking Statements

This report contains statements that do not directly or exclusively relate to historical facts. These statements are "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements can typically be identified by the use of forward-looking words, such as "will," "may," "could," "project," "believe," "anticipate," "expect," "estimate," "continue," "intend," "potential," "plan," "forecast" and similar terms. These statements are based upon MidAmerican Funding's and MidAmerican Energy's current intentions, assumptions, expectations and beliefs and are subject to risks, uncertainties and other important factors. Many of these factors are outside the control of MidAmerican Funding or MidAmerican Energy and could cause actual results to differ materially from those expressed or implied by such forward-looking statements. These factors include, among others:

• general economic, political and business conditions, as well as, changes in laws and regulations affecting MidAmerican Energy's operations or related industries;

• changes in, and compliance with, environmental laws, regulations, decisions and policies that could, among other items, increase operating and capital costs, reduce generating facility output, accelerate generating facility retirements or delay generating facility construction or acquisition;

• the outcome of rate cases and other proceedings conducted by regulatory commissions or other governmental and legal bodies and MidAmerican Energy's ability to recover costs in rates in a timely manner;

• changes in economic, industry, competition or weather conditions, as well as demographic trends and new technologies, that could affect customer growth and usage, electricity and natural gas supply or MidAmerican Energy's ability to obtain long-term contracts with customers and suppliers;

• a high degree of variance between actual and forecasted load or generation that could impact MidAmerican Energy's hedging strategy and the cost of balancing its generation resources with its retail load obligations;

• performance and availability of MidAmerican Energy's generating facilities, including the impacts of outages and repairs, transmission constraints, weather, including wind, and operating conditions;

• changes in prices, availability and demand for wholesale electricity, coal, natural gas, other fuel sources and fuel transportation that could have a significant impact on generating capacity and energy costs;

• the financial condition and creditworthiness of MidAmerican Energy's significant customers and suppliers;

ii

• changes in business strategy or development plans;

• availability, terms and deployment of capital, including reductions in demand for investment grade commercial paper, debt securities and other sources of debt financing and volatility in the London Interbank Offered Rate, the base interest rate for MidAmerican Energy's credit facilities;

• changes in MidAmerican Energy's credit ratings;

• risks relating to nuclear generation;

• the impact of certain contracts used to mitigate or manage volume, price and interest rate risk, including increased collateral requirements, and changes in commodity prices, interest rates and other conditions that affect the fair value of certain contracts;

• the impact of inflation on costs and MidAmerican Energy's ability to recover such costs in regulated rates;

• increases in employee healthcare costs, including the implementation of the Affordable Care Act;

• the impact of investment performance and changes in interest rates, legislation, healthcare cost trends, mortality and morbidity on pension and other postretirement benefits expense and funding requirements;

• unanticipated construction delays, changes in costs, receipt of required permits and authorizations, ability to fund capital projects and other factors that could affect future generating facilities and infrastructure additions;

• the impact of new accounting guidance or changes in current accounting estimates and assumptions on MidAmerican Funding's or MidAmerican Energy's consolidated financial results;

• other risks or unforeseen events, including the effects of storms, floods, fires, explosions, litigation, wars, terrorism, embargoes and other catastrophic events; and

• other business or investment considerations that may be disclosed from time to time in MidAmerican Funding's or MidAmerican Energy's filings with the United States Securities and Exchange Commission or in other publicly disseminated written documents.

Further details of the potential risks and uncertainties affecting MidAmerican Funding or MidAmerican Energy are described in their filings with the United States Securities and Exchange Commission, including Part II, Item 1A and other discussions contained in this Form 10-Q. MidAmerican Funding and MidAmerican Energy undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. The foregoing factors should not be construed as exclusive.

iii

PART I

Item 1. Financial Statements

MidAmerican Energy Company

Report of Independent Registered Public Accounting Firm	2
Balance Sheets	3
Statements of Operations	4
Statements of Comprehensive Income	5
Statements of Changes in Equity	6
Statements of Cash Flows	7
Notes to Financial Statements	8
MidAmerican Funding, LLC and Subsidiaries
Report of Independent Registered Public Accounting Firm	20
Consolidated Balance Sheets	21
Consolidated Statements of Operations	22
Consolidated Statements of Comprehensive Income	23
Consolidated Statements of Changes in Equity	24
Consolidated Statements of Cash Flows	25
Notes to Consolidated Financial Statements	26

1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholder of

MidAmerican Energy Company

Des Moines, Iowa

We have reviewed the accompanying balance sheet of MidAmerican Energy Company (the "Company") as of June 30, 2013, and the related statements of operations and comprehensive income for the three-month and six-month periods ended June 30, 2013 and 2012, and of changes in equity and cash flows for the six-month periods ended June 30, 2013 and 2012. These interim financial statements are the responsibility of the Company's management.

We conducted our reviews in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our reviews, we are not aware of any material modifications that should be made to such interim financial statements for them to be in conformity with accounting principles generally accepted in the United States of America.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet and consolidated statement of capitalization (not presented herein) of MidAmerican Energy Company and subsidiaries as of December 31, 2012, and the related consolidated statements of operations, comprehensive income, changes in equity and cash flows for the year then ended (not presented herein); and in our report dated March 1, 2013, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying balance sheet as of December 31, 2012 is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ Deloitte & Touche LLP

Des Moines, Iowa

August 2, 2013

2

MIDAMERICAN ENERGY COMPANY

BALANCE SHEETS (Unaudited)

(Amounts in millions)

	As of
	June 30, 2013			December 31, 2012
ASSETS
Utility plant, net:
Electric	$	11,527		$	11,416
Gas	1,316			1,301
Gross utility plant in service	12,843			12,717
Accumulated depreciation and amortization	(4,575		)	(4,413		)
Utility plant in service, net	8,268			8,304
Construction work in progress	431			318
Total utility plant, net	8,699			8,622
Current assets:
Cash and cash equivalents	186			354
Receivables, net	380			416
Income taxes receivable	20			—
Inventories	216			240
Other	72			56
Total current assets	874			1,066
Other assets:
Regulatory assets	844			876
Investments and nonregulated property, net	553			535
Other	122			133
Total other assets	1,519			1,544
Total assets	$	11,092		$	11,232
CAPITALIZATION AND LIABILITIES
Capitalization:
MidAmerican Energy common shareholder's equity	$	3,613		$	3,608
Preferred securities	—			27
Long-term debt, excluding current portion	2,598			2,590
Total capitalization	6,211			6,225
Current liabilities:
Current portion of long-term debt	669			669
Accounts payable	300			386
Taxes accrued	113			224
Interest accrued	41			27
Other	120			120
Total current liabilities	1,243			1,426
Other liabilities:
Deferred income taxes	2,219			2,164
Asset retirement obligations	326			318
Regulatory liabilities	775			750
Other	318			349
Total other liabilities	3,638			3,581
Total capitalization and liabilities	$	11,092		$	11,232

The accompanying notes are an integral part of these financial statements.

3

MIDAMERICAN ENERGY COMPANY

STATEMENTS OF OPERATIONS (Unaudited)

(Amounts in millions)

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Operating revenue:
Regulated electric	$	411		$	404		$	826		$	784
Regulated gas	142			91			457			354
Nonregulated	204			214			394			445
Total operating revenue	757			709			1,677			1,583
Operating costs and expenses:
Regulated:
Cost of fuel, energy and capacity	114			101			237			209
Cost of gas sold	88			45			312			231
Other operating expenses	111			100			217			202
Maintenance	70			52			115			98
Depreciation and amortization	104			100			211			193
Property and other taxes	30			30			60			59
Total regulated operating costs and expenses	517			428			1,152			992
Nonregulated:
Cost of sales	190			193			364			405
Other	7			7			12			13
Total nonregulated operating costs and expenses	197			200			376			418
Total operating costs and expenses	714			628			1,528			1,410
Operating income	43			81			149			173
Non-operating income:
Interest income	1			1			1			1
Allowance for equity funds	4			3			8			5
Other, net	3			—			7			4
Total non-operating income	8			4			16			10
Fixed charges:
Interest on long-term debt	35			36			70			73
Other interest expense	1			1			1			1
Allowance for borrowed funds	(2		)	(1		)	(3		)	(2		)
Total fixed charges	34			36			68			72
Income before income tax benefit	17			49			97			111
Income tax benefit	(7		)	(32		)	(30		)	(44		)
Net income	24			81			127			155
Preferred dividends	1			1			1			1
Earnings on common stock	$	23		$	80		$	126		$	154

The accompanying notes are an integral part of these financial statements.

4

MIDAMERICAN ENERGY COMPANY

STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

(Amounts in millions)

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	2013			2012		2013		2012
Net income	$	24		$	81	$	127	$	155
Other comprehensive (loss) income, net of tax:
Unrealized (losses) gains on cash flow hedges, net of tax of $(10), $5, $2 and $(6)	(14		)	7		4		(7		)
Comprehensive income	$	10		$	88	$	131	$	148

The accompanying notes are an integral part of these financial statements.

5

MIDAMERICAN ENERGY COMPANY

STATEMENTS OF CHANGES IN EQUITY (Unaudited)

(Amounts in millions)

	MidAmerican Energy Shareholders' Equity
	Common Stock			Retained Earnings			Accumulated Other Comprehensive Loss, Net			Preferred Securities			Noncontrolling Interests		Total Equity
Balance, December 31, 2011	$	562		$	2,716		$	(34	)	$	27		$	1	$	3,272
Net income	—			155			—			—			—		155
Other comprehensive loss	—			—			(7		)	—			—		(7		)
Preferred dividends	—			(1		)	—			—			—		(1		)
Balance, June 30, 2012	$	562		$	2,870		$	(41	)	$	27		$	1	$	3,419
Balance, December 31, 2012	$	562		$	3,070		$	(24	)	$	27		$	—	$	3,635
Net income	—			127			—			—			—		127
Other comprehensive income	—			—			4			—			—		4
Redemption of preferred securities	(1		)	—			—			(27		)	—		(28		)
Common dividends	—			(125		)	—			—			—		(125		)
Balance, June 30, 2013	$	561		$	3,072		$	(20	)	$	—		$	—	$	3,613

The accompanying notes are an integral part of these financial statements.

6

MIDAMERICAN ENERGY COMPANY

STATEMENTS OF CASH FLOWS (Unaudited)

(Amounts in millions)

	Six-Month Periods
	Ended June 30,
	2013			2012
Cash flows from operating activities:
Net income	$	127		$	155
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	211			193
Deferred income taxes and amortization of investment tax credits	16			22
Changes in other assets and liabilities	28			22
Other, net	1			(8		)
Changes in other operating assets and liabilities:
Receivables, net	32			51
Inventories	24			—
Derivative collateral, net	5			—
Pension and other postretirement benefit plans	4			(55		)
Accounts payable	(35		)	—
Taxes accrued	(133		)	432
Other current assets and liabilities	22			3
Net cash flows from operating activities	302			815
Cash flows from investing activities:
Utility construction expenditures	(327		)	(259		)
Purchases of available-for-sale securities	(44		)	(29		)
Proceeds from sales of available-for-sale securities	37			20
Other, net	17			7
Net cash flows from investing activities	(317		)	(261		)
Cash flows from financing activities:
Dividends	(125		)	(1		)
Repayments of long-term debt	—			(283		)
Redemption of preferred securities	(28		)	—
Net cash flows from financing activities	(153		)	(284		)
Net change in cash and cash equivalents	(168		)	270
Cash and cash equivalents at beginning of period	354			1
Cash and cash equivalents at end of period	$	186		$	271

The accompanying notes are an integral part of these financial statements.

7

MIDAMERICAN ENERGY COMPANY

NOTES TO FINANCIAL STATEMENTS

(Unaudited)

(1) General

MidAmerican Energy Company ("MidAmerican Energy") is a public utility with electric and natural gas operations and is the principal subsidiary of MHC Inc. ("MHC"). MHC is a holding company that conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's nonregulated subsidiaries include Midwest Capital Group, Inc. and MEC Construction Services Co. MHC is the direct, wholly owned subsidiary of MidAmerican Funding, LLC ("MidAmerican Funding"), which is an Iowa limited liability company with MidAmerican Energy Holdings Company ("MEHC") as its sole member. MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").

The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Financial Statements as of June 30, 2013, and for the three- and six-month periods ended June 30, 2013 and 2012. The results of operations for the three- and six-month periods ended June 30, 2013, are not necessarily indicative of the results to be expected for the full year.

The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in MidAmerican Energy's Annual Report on Form 10-K for the year ended December 31, 2012, describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in MidAmerican Energy's assumptions regarding significant accounting estimates and policies during the six-month period ended June 30, 2013.

(2) New Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-04, which amends FASB Accounting Standards Codification ("ASC") Topic 405, "Liabilities." The amendments in this guidance require an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the amount the reporting entity agreed to pay plus any additional amounts the reporting entity expects to pay on behalf of its co-obligor. Additionally, the guidance requires the entity to disclose the nature and amount of the obligation, as well as other information about those obligations. This guidance is effective for interim and annual reporting periods beginning after December 15, 2013. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements.

In February 2013, the FASB issued ASU No. 2013-02, which amends FASB ASC Topic 220, "Comprehensive Income." The amendments in this guidance require an entity to provide information about the amounts reclassified out of accumulated other comprehensive income (loss) ("AOCI") by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income if the amount reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required by GAAP that provide additional detail about those amounts. MidAmerican Energy adopted this guidance on January 1, 2013. The adoption of this guidance did not have a material impact on MidAmerican Energy's disclosures included within Notes to Financial Statements.

8

In December 2011, the FASB issued ASU No. 2011-11, which amends FASB ASC Topic 210, "Balance Sheet." The amendments in this guidance require an entity to provide quantitative disclosures about offsetting financial instruments and derivative instruments. Additionally, this guidance requires qualitative and quantitative disclosures about master netting agreements or similar agreements when the financial instruments and derivative instruments are not offset. In January 2013, the FASB issued ASU No. 2013-01, which also amends FASB ASC Topic 210 to clarify that the scope of ASU No. 2011-11 only applies to derivative instruments, repurchase agreements, reverse purchase agreements and securities borrowing and securities lending transactions that are either being offset or are subject to an enforceable master netting arrangement or similar agreement. MidAmerican Energy adopted the guidance on January 1, 2013. The adoption of the guidance did not have a material impact on MidAmerican Energy's disclosures included within Notes to Financial Statements.

(3) Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in AOCI by each component of other comprehensive income, net of applicable income taxes, for the six-month period ended June 30, 2013 (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			Losses on			Other
	Available-For-Sale			Cash Flow			Comprehensive
	Securities			Hedges			Loss, Net
Balance, December 31, 2012	$	(5	)	$	(19	)	$	(24	)
Other comprehensive income	—			4			4
Balance, June 30, 2013	$	(5	)	$	(15	)	$	(20	)

Reclassifications from AOCI to net income for the six-month periods ended June 30, 2013 and 2012, were net losses reflected in nonregulated cost of sales totaling $6 million and $27 million, respectively.

(4) Preferred Securities

In April 2013, MidAmerican Energy redeemed all of the outstanding shares of its preferred securities at the stated redemption prices, which in aggregate totaled $28 million, plus accrued dividends.

(5) Recent Financing Transactions

In March 2013, MidAmerican Energy replaced its $530 million unsecured revolving credit facility, which had been set to expire in July 2013, with a $600 million unsecured revolving credit facility expiring in March 2018. The new credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the London Interbank Offered Rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for its senior unsecured long-term debt securities. As of June 30, 2013, MidAmerican Energy had no borrowings outstanding under this credit facility. The credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.

9

(6) Income Taxes

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(57	)	(54	)	(60	)	(51	)
State income tax, net of federal income tax benefit	(4	)	(11	)	(2	)	(8	)
Income tax method change	—		(32	)	—		(14	)
Effects of ratemaking	(15	)	(3	)	(4	)	(3	)
Other, net	—		—		—		1
Effective income tax rate	(41	)%	(65	)%	(31	)%	(40	)%

Income tax credits relate primarily to production tax credits earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities were placed in service.

MidAmerican Energy's earnings for the three- and six-month periods ended June 30, 2012, reflect $16 million of federal income tax benefits recognized in connection with an income tax method change for income tax years prior to 2012. MidAmerican Energy changed the method by which it determines current income tax deductions for repair costs related to its regulated utility electric transmission and distribution assets based on guidance published by the Internal Revenue Service. Application of this guidance results in current deductibility for those costs, which are capitalized for book purposes. MidAmerican Energy retroactively applied the method change, deducted amounts related to prior years' costs on its 2011 tax return and recognized the change in the second quarter of 2012. State utility rate regulation in Iowa requires the tax effect of certain temporary differences be flowed through immediately to customers. Therefore, certain deferred amounts that would otherwise have been recognized in income tax expense have been included as changes in regulatory assets.

Berkshire Hathaway includes MEHC and subsidiaries in its United States federal income tax return. Consistent with established regulatory practice, MidAmerican Energy's provision for income taxes has been computed on a stand-alone basis, and substantially all of its currently payable or receivable income taxes are remitted to or received from MEHC. MidAmerican Energy made net cash payments for income taxes to MEHC totaling $89 million for the six-month period ended June 30, 2013, and received net cash receipts for income taxes from MEHC totaling $494 million for the six-month period ended June 30, 2012.

10

(7) Employee Benefit Plans

MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of MEHC and its domestic energy subsidiaries other than PacifiCorp. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of MEHC and its domestic energy subsidiaries other than PacifiCorp. Net periodic benefit cost 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,
	2013			2012			2013			2012
Pension:
Service cost	$	4		$	5		$	9		$	9
Interest cost	8			9			16			18
Expected return on plan assets	(11		)	(12		)	(22		)	(22		)
Net amortization	2			1			5			2
Net periodic benefit cost	$	3		$	3		$	8		$	7
Other postretirement:
Service cost	$	1		$	1		$	2		$	2
Interest cost	2			2			4			4
Expected return on plan assets	(4		)	(3		)	(7		)	(6		)
Net amortization	—			(2		)	(1		)	(2		)
Net periodic benefit cost (benefit)	$	(1	)	$	(2	)	$	(2	)	$	(2	)

Employer contributions to the pension and other postretirement benefit plans are expected to be $8 million and $- million, respectively, during 2013. As of June 30, 2013, $4 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

(8) 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 Note 9 for additional information on derivative contracts.

11

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 Balance Sheets (in millions):

	Current Assets - Other			Other Assets - Other			Current Liabilities - Other			Other Liabilities - Other			Total
As of June 30, 2013:
Not designated as hedging contracts(1):
Commodity assets	$	18		$	3		$	5		$	—		$	26
Commodity liabilities	(15		)	(1		)	(31		)	(3		)	(50		)
Total	3			2			(26		)	(3		)	(24		)
Designated as hedging contracts:
Commodity assets	—			(1		)	2			1			2
Commodity liabilities	—			—			(18		)	(10		)	(28		)
Total	—			(1		)	(16		)	(9		)	(26		)
Total derivatives	3			1			(42		)	(12		)	(50		)
Cash collateral receivable	—			—			2			—			2
Total derivatives - net basis	$	3		$	1		$	(40	)	$	(12	)	$	(48	)

	Current Assets - Other			Other Assets - Other		Current Liabilities - Other			Other Liabilities - Other			Total
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	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2013 and December 31, 2012, a net regulatory asset of $23 million and $45 million, respectively, was recorded related to the net derivative liability of $24 million and $45 million, respectively.

12

Not Designated as Hedging Contracts

The following table reconciles the beginning and ending balances of MidAmerican Energy'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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	24		$	60		$	45		$	73
Changes in fair value recognized in net regulatory assets	1			1			—			11
Net gains reclassified to operating revenue	—			7			3			20
Net gains reclassified to cost of fuel, energy and capacity	—			—			—			1
Net losses reclassified to cost of gas sold	(2		)	(5		)	(25		)	(42		)
Ending balance	$	23		$	63		$	23		$	63

The following table summarizes the pre-tax gains (losses) included on the 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 (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013		2012
Nonregulated operating revenue	$	3		$	(1	)	$	1	$	7
Nonregulated cost of sales	(3		)	2			—		(5		)
Total	$	—		$	1		$	1	$	2

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 commodity derivative contracts designated and qualifying as cash flow hedges recognized in other comprehensive income ("OCI"), as well as amounts reclassified to earnings (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	2		$	68		$	32		$	43
Changes in fair value recognized in OCI	25			2			—			40
Net losses reclassified to nonregulated cost of sales	(1		)	(14		)	(6		)	(27		)
Ending balance	$	26		$	56		$	26		$	56

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 three- and six-month periods ended June 30, 2013 and 2012, hedge ineffectiveness was insignificant. As of June 30, 2013, MidAmerican Energy had cash flow hedges with expiration dates extending through December 2017, and $16 million of pre-tax net unrealized losses are forecasted to be reclassified from AOCI into earnings over the next twelve months as contracts settle.

13

Derivative Contract Volumes

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	June 30,	December 31,
	Measure	2013	2012
Electricity purchases	Megawatt hours	5	5
Natural gas purchases	Decatherms	23	36

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 Midcontinent Independent 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 June 30, 2013, MidAmerican Energy's credit ratings from the three recognized credit rating agencies were investment grade.

14

The aggregate fair value of MidAmerican Energy's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $58 million and $84 million as of June 30, 2013 and December 31, 2012, 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 June 30, 2013 and December 31, 2012, MidAmerican Energy would have been required to post $47 million and $72 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.

(9) Fair Value Measurements

The carrying value of MidAmerican Energy's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. MidAmerican Energy has various financial assets and liabilities that are measured at fair value on the Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows:

• Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that MidAmerican Energy has the ability to access at the measurement date.

• Level 2 — Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

• Level 3 — Unobservable inputs reflect MidAmerican Energy's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. MidAmerican Energy develops these inputs based on the best information available, including its own data.

15

The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions):

	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other(1)			Total
As of June 30, 2013:
Assets:
Commodity derivatives	$	1		$	20		$	7		$	(24	)	$	4
Money market mutual funds(2)	172			—			—			—			172
Debt securities:
United States government obligations	118			—			—			—			118
International government obligations	—			1			—			—			1
Corporate obligations	—			31			—			—			31
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			22			—			22
Equity securities:
United States companies	202			—			—			—			202
International companies	3			—			—			—			3
	$	496		$	56		$	29		$	(24	)	$	557
Liabilities - commodity derivatives	$	(5	)	$	(64	)	$	(9	)	$	26		$	(52	)

As of December 31, 2012:
Assets:
Commodity derivatives	$	1		$	22		$	7		$	(23	)	$	7
Money market mutual funds(2)	163			—			—			—			163
Debt securities:
United States government obligations	104			—			—			—			104
International government obligations	—			1			—			—			1
Corporate obligations	—			32			—			—			32
Municipal obligations	—			4			—			—			4
Agency, asset and mortgage-backed obligations	—			6			—			—			6
Auction rate securities	—			—			21			—			21
Equity securities:
United States companies	187			—			—			—			187
International companies	2			—			—			—			2
Investment funds	1			—			—			—			1
	$	458		$	65		$	28		$	(23	)	$	528
Liabilities - commodity derivatives	$	(10	)	$	(90	)	$	(7	)	$	30		$	(77	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $2 million and $7 million as of June 30, 2013 and December 31, 2012, respectively.

(2) Amounts are included in cash and cash equivalents and investments and nonregulated property, net on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

16

Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which MidAmerican Energy transacts. When quoted prices for identical contracts are not available, MidAmerican Energy uses forward price curves. Forward price curves represent MidAmerican Energy's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. MidAmerican Energy bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent energy brokers, exchanges, direct communication with market participants and actual transactions executed by MidAmerican Energy. Market price quotations are generally readily obtainable for the applicable term of MidAmerican Energy's outstanding derivative contracts; therefore, MidAmerican Energy's forward price curves reflect observable market quotes. Market price quotations for certain electricity and natural gas trading hubs are not as readily obtainable due to the length of the contract. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, MidAmerican Energy uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 8 for further discussion regarding MidAmerican Energy's risk management and hedging activities.

MidAmerican Energy's investments in money market mutual funds and debt and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. The fair value of MidAmerican Energy's investments in auction rate securities, where there is no current liquid market, is determined using pricing models based on available observable market data and MidAmerican Energy's judgment about the assumptions, including liquidity and nonperformance risks, which market participants would use when pricing the asset.

The following table reconciles the beginning and ending balances of MidAmerican Energy's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	Commodity Derivatives			Auction Rate Securities		Commodity Derivatives			Auction Rate Securities
2013:
Beginning balance	$	(2	)	$	22	$	—		$	21
Changes included in earnings(1)	2			—		5			—
Changes in fair value recognized in other comprehensive income	(2		)	—		(5		)	1
Changes in fair value recognized in net regulatory assets	1			—		2			—
Settlements	(1		)	—		(4		)	—
Ending balance	$	(2	)	$	22	$	(2	)	$	22
2012:
Beginning balance	$	23		$	17	$	22		$	16
Changes included in earnings(1)	(1		)	—		9			—
Changes in fair value recognized in other comprehensive income	(1		)	—		(4		)	1
Changes in fair value recognized in net regulatory assets	(6		)	—		2			—
Settlements	(7		)	—		(21		)	—
Ending balance	$	8		$	17	$	8		$	17

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2013 and 2012, net unrealized gains (losses) included in earnings for the three-month periods ended June 30, 2013 and 2012, totaled $2 million and $(2) million, respectively, and for the six-month periods ended June 30, 2013 and 2012, totaled $(1) million and $5 million, respectively.

17

MidAmerican Energy's long-term debt is carried at cost on the Financial Statements. The fair value of MidAmerican Energy's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Energy's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Energy's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,267	$	3,601	$	3,259	$	3,737

(10) Commitments and Contingencies

Legal Matters

MidAmerican Energy is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Energy does not believe that such normal and routine litigation will have a material impact on its financial results.

Commitments

In May 2013, MidAmerican Energy filed with the Iowa Utilities Board ("IUB") an application for ratemaking principles to construct up to 1,050 megawatts (nominal ratings) of additional wind-powered generating facilities expected to be placed in service in 2013, 2014 and 2015. In July 2013, MidAmerican Energy entered into contracts totaling $1.1 billion related to these wind-powered generating facilities, with minimum payments expected to be $199 million in 2013, $431 million in 2014 and $490 million in 2015.

In July 2013, MidAmerican Energy entered into a contract totaling $342 million to construct transmission assets related to its Multi-Value Projects approved by the Midcontinent Independent System Operator, Inc. with minimum payments of $17 million in 2013, $140 million in 2014, $149 million in 2015 and $36 million in 2016.

Environmental Laws and Regulations

MidAmerican Energy is subject to federal, state and local laws and regulations regarding air and water quality, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations.

(11) Segment Information

MidAmerican Energy has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost.

18

The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Total operating revenue	$	757	$	709	$	1,677	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Total operating income	$	43	$	81	$	149	$	173

	As of
	June 30, 2013		December 31, 2012
Total assets:
Regulated electric	$	9,912	$	9,898
Regulated gas	1,053		1,202
Nonregulated energy	127		132
Total assets	$	11,092	$	11,232

(12) Other Related Party Transactions

In 2012, MidAmerican Energy signed new long-term rail transportation contracts with BNSF Railway Company ("BNSF"), an affiliate company, and Union Pacific Railroad Company ("UP") for the transportation of coal to all of the MidAmerican Energy-operated coal-fueled generating facilities. These contracts replaced a long-term contract with UP that expired December 31, 2012. For the three- and six-month periods ended June 30, 2013, $38 million and $89 million, respectively, was incurred for coal transportation services, the majority of which was related to the BNSF agreement. As of June 30, 2013, MidAmerican Energy had accounts payable to BNSF of $5 million.

19

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Managers and Member of

MidAmerican Funding, LLC

Des Moines, Iowa

We have reviewed the accompanying consolidated balance sheet of MidAmerican Funding, LLC and subsidiaries (the "Company") as of June 30, 2013, and the related consolidated statements of operations and comprehensive income for the three-month and six-month periods ended June 30, 2013 and 2012, and of changes in equity and cash flows for the six-month periods ended June 30, 2013 and 2012. These interim financial statements are the responsibility of the Company's management.

We conducted our reviews in accordance with the standards of the Public Company Accounting Oversight Board (United States). A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters. It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our reviews, we are not aware of any material modifications that should be made to such consolidated interim financial statements for them to be in conformity with accounting principles generally accepted in the United States of America.

We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet and consolidated statement of capitalization (not presented herein) of MidAmerican Funding, LLC and subsidiaries as of December 31, 2012, and the related consolidated statements of operations, comprehensive income, changes in equity and cash flows for the year then ended (not presented herein); and in our report dated March 1, 2013, we expressed an unqualified opinion on those consolidated financial statements. In our opinion, the information set forth in the accompanying consolidated balance sheet as of December 31, 2012 is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ Deloitte & Touche LLP

Des Moines, Iowa

August 2, 2013

20

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (Unaudited)

(Amounts in millions)

	As of
	June 30, 2013			December 31, 2012
ASSETS
Utility plant, net:
Electric	$	11,527		$	11,416
Gas	1,316			1,301
Gross utility plant in service	12,843			12,717
Accumulated depreciation and amortization	(4,575		)	(4,413		)
Utility plant in service, net	8,268			8,304
Construction work in progress	431			318
Total utility plant, net	8,699			8,622
Current assets:
Cash and cash equivalents	187			354
Receivables, net	382			418
Income taxes receivable	16			—
Inventories	216			240
Other	73			57
Total current assets	874			1,069
Other assets:
Goodwill	1,270			1,270
Regulatory assets	844			876
Investments and nonregulated property, net	579			561
Other	121			132
Total other assets	2,814			2,839
Total assets	$	12,387		$	12,530
CAPITALIZATION AND LIABILITIES
Capitalization:
MidAmerican Funding member's equity	$	4,449		$	4,324
Noncontrolling interests	—			27
Long-term debt, excluding current portion	2,923			2,915
Total capitalization	7,372			7,266
Current liabilities:
Current portion of long-term debt	669			669
Note payable to affiliate	127			246
Accounts payable	300			386
Taxes accrued	113			227
Interest accrued	48			35
Other	120			120
Total current liabilities	1,377			1,683
Other liabilities:
Deferred income taxes	2,218			2,162
Asset retirement obligations	326			318
Regulatory liabilities	775			750
Other	319			351
Total other liabilities	3,638			3,581
Total capitalization and liabilities	$	12,387		$	12,530

The accompanying notes are an integral part of these consolidated financial statements.

21

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

(Amounts in millions)

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Operating revenue:
Regulated electric	$	411		$	404		$	826		$	784
Regulated gas	142			91			457			354
Nonregulated	206			214			397			445
Total operating revenue	759			709			1,680			1,583
Operating costs and expenses:
Regulated:
Cost of fuel, energy and capacity	114			101			237			209
Cost of gas sold	88			45			312			231
Other operating expenses	111			100			217			202
Maintenance	70			52			115			98
Depreciation and amortization	104			100			211			193
Property and other taxes	30			30			60			59
Total regulated operating costs and expenses	517			428			1,152			992
Nonregulated:
Cost of sales	191			193			365			405
Other	8			7			14			14
Total nonregulated operating costs and expenses	199			200			379			419
Total operating costs and expenses	716			628			1,531			1,411
Operating income	43			81			149			172
Non-operating income:
Interest income	1			1			1			1
Allowance for equity funds	4			3			8			5
Other, net	4			1			10			6
Total non-operating income	9			5			19			12
Fixed charges:
Interest on long-term debt	40			42			81			84
Other interest expense	1			—			1			1
Allowance for borrowed funds	(2		)	(1		)	(3		)	(2		)
Total fixed charges	39			41			79			83
Income before income tax benefit	13			45			89			101
Income tax benefit	(9		)	(33		)	(33		)	(48		)
Net income	22			78			122			149
Net income attributable to noncontrolling interests	1			1			1			1
Net income attributable to MidAmerican Funding member	$	21		$	77		$	121		$	148

The accompanying notes are an integral part of these consolidated financial statements.

22

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

(Amounts in millions)

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	2013			2012		2013		2012
Net income	$	22		$	78	$	122	$	149
Other comprehensive (loss) income, net of tax:
Unrealized (losses) gains on cash flow hedges, net of tax of $(10), $5, $2 and $(6)	(14		)	7		4		(7		)
Comprehensive income	8			85		126		142
Comprehensive income attributable to noncontrolling interests	1			1		1		1
Comprehensive income attributable to MidAmerican Funding member	$	7		$	84	$	125	$	141

The accompanying notes are an integral part of these consolidated financial statements.

23

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited)

(Amounts in millions)

	MidAmerican Funding Member's Equity
	Paid-in Capital		Retained Earnings		Accumulated Other Comprehensive Loss, Net			Noncontrolling Interests			Total Equity
Balance, December 31, 2011	$	1,679	$	2,327	$	(34	)	$	28		$	4,000
Net income	—		148		—			1			149
Other comprehensive loss	—		—		(7		)	—			(7		)
Distributions to noncontrolling interests	—		—		—			(1		)	(1		)
Balance, June 30, 2012	$	1,679	$	2,475	$	(41	)	$	28		$	4,141
Balance, December 31, 2012	$	1,679	$	2,669	$	(24	)	$	27		$	4,351
Net income	—		121		—			1			122
Other comprehensive income	—		—		4			—			4
Redemption of preferred securities of subsidiary	—		—					(28		)	(28		)
Balance, June 30, 2013	$	1,679	$	2,790	$	(20	)	$	—		$	4,449

The accompanying notes are an integral part of these consolidated financial statements.

24

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(Amounts in millions)

	Six-Month Periods
	Ended June 30,
	2013			2012
Cash flows from operating activities:
Net income	$	122		$	149
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	211			193
Deferred income taxes and amortization of investment tax credits	16			21
Changes in other assets and liabilities	28			22
Other, net	—			(8		)
Changes in other operating assets and liabilities:
Receivables, net	32			52
Inventories	24			—
Derivative collateral, net	5			—
Pension and other postretirement benefit plans	4			(55		)
Accounts payable	(35		)	—
Taxes accrued	(133		)	433
Other current assets and liabilities	22			3
Net cash flows from operating activities	296			810
Cash flows from investing activities:
Utility construction expenditures	(327		)	(259		)
Purchases of available-for-sale securities	(44		)	(29		)
Proceeds from sales of available-for-sale securities	37			20
Other, net	18			7
Net cash flows from investing activities	(316		)	(261		)
Cash flows from financing activities:
Repayment of long-term debt	—			(283		)
Redemption of preferred securities of subsidiary	(28		)	—
Net change in note payable to affiliate	(119		)	6
Other, net	—			(1		)
Net cash flows from financing activities	(147		)	(278		)
Net change in cash and cash equivalents	(167		)	271
Cash and cash equivalents at beginning of period	354			1
Cash and cash equivalents at end of period	$	187		$	272

The accompanying notes are an integral part of these consolidated financial statements.

25

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(1) General

MidAmerican Funding, LLC ("MidAmerican Funding") is an Iowa limited liability company with MidAmerican Energy Holdings Company ("MEHC") as its sole member. MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). MidAmerican Funding's direct, wholly owned subsidiary is MHC Inc. ("MHC"), which constitutes substantially all of MidAmerican Funding's assets, liabilities and business activities except those related to MidAmerican Funding's long-term debt securities. MHC conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's principal subsidiary is MidAmerican Energy Company ("MidAmerican Energy"), a public utility with electric and natural gas operations. Direct, wholly owned nonregulated subsidiaries of MHC are Midwest Capital Group, Inc. and MEC Construction Services Co.

The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Consolidated Financial Statements as of June 30, 2013, and for the three- and six-month periods ended June 30, 2013 and 2012. The results of operations for the three- and six-month periods ended June 30, 2013, are not necessarily indicative of the results to be expected for the full year.

The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in MidAmerican Funding's Annual Report on Form 10-K for the year ended December 31, 2012, describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in MidAmerican Funding's assumptions regarding significant accounting estimates and policies during the six-month period ended June 30, 2013.

(2) New Accounting Pronouncements

Refer to Note 2 of MidAmerican Energy's Notes to Financial Statements.

(3) Components of Accumulated Other Comprehensive Loss, Net

Refer to Note 3 of MidAmerican Energy's Notes to Financial Statements.

(4)    Noncontrolling Interests

Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements. Preferred securities of subsidiary comprised the total of noncontrolling interests on the Consolidated Balance Sheet as of December 31, 2012.

(5) Recent Financing Transactions

Refer to Note 5 of MidAmerican Energy's Notes to Financial Statements.

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(6) Income Taxes

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(75	)	(60	)	(66	)	(57	)
State income tax, net of federal income tax benefit	(8	)	(13	)	(3	)	(9	)
Income tax method change	—		(36	)	—		(16	)
Effects of ratemaking	(20	)	(4	)	(4	)	(3	)
Other, net	(1	)	5		1		2
Effective income tax rate	(69	)%	(73	)%	(37	)%	(48	)%

Income tax credits relate primarily to production tax credits earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities were placed in service.

MidAmerican Energy's earnings for the three- and six-month periods ended June 30, 2012, reflect $16 million of federal income tax benefits recognized in connection with an income tax method change for income tax years prior to 2012. MidAmerican Energy changed the method by which it determines current income tax deductions for repair costs related to its regulated utility electric transmission and distribution assets based on guidance published by the Internal Revenue Service. Application of this guidance results in current deductibility for those costs, which are capitalized for book purposes. MidAmerican Energy retroactively applied the method change, deducted amounts related to prior years' costs on its 2011 tax return and recognized the change in the second quarter of 2012. State utility rate regulation in Iowa requires the tax effect of certain temporary differences be flowed through immediately to customers. Therefore, certain deferred amounts that would otherwise have been recognized in income tax expense have been included as changes in regulatory assets.

Berkshire Hathaway includes MEHC and subsidiaries in its United States federal income tax return. Consistent with established regulatory practice, MidAmerican Funding's and MidAmerican Energy's provisions for income taxes have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income taxes are remitted to or received from MEHC. MidAmerican Funding made net cash payments for income taxes to MEHC totaling $86 million for the six-month period ended June 30, 2013, and received net cash receipts for income taxes totaling $498 million for the six-month period ended June 30, 2012.

(7) Employee Benefit Plans

Refer to Note 7 of MidAmerican Energy's Notes to Financial Statements.

(8) Risk Management and Hedging Activities

Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements.

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(9) Fair Value Measurements

Refer to Note 9 of MidAmerican Energy's Notes to Financial Statements. MidAmerican Funding's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of MidAmerican Funding's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Funding's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,592	$	4,012	$	3,584	$	4,186

(10) Commitments and Contingencies

MidAmerican Funding is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Funding does not believe that such normal and routine litigation will have a material impact on its consolidated financial results.

Refer to Note 10 of MidAmerican Energy's Notes to Financial Statements.

(11) Segment Information

MidAmerican Funding has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the nonregulated subsidiaries of MidAmerican Funding not engaged in the energy business and parent company interest expense. The following tables provide information on a reportable segment basis (in millions):

28

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Other	2		—		3		—
Total operating revenue	$	759	$	709	$	1,680	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Other	—		—		—		(1		)
Total operating income	$	43	$	81	$	149	$	172

	As of
	June 30, 2013		December 31, 2012
Total assets(1):
Regulated electric	$	11,103	$	11,089
Regulated gas	1,131		1,280
Nonregulated energy	127		132
Other	26		29
Total assets	$	12,387	$	12,530

(1) Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

(12) Other Related Party Transactions

Refer to Note 12 of MidAmerican Energy's Notes to Financial Statements.

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Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations

MidAmerican Funding is an Iowa limited liability company whose sole member is MEHC. MidAmerican Funding owns all of the outstanding common stock of MHC Inc., which owns all of the common stock of MidAmerican Energy, Midwest Capital Group, Inc. and MEC Construction Services Co. MidAmerican Energy is a public utility company headquartered in Des Moines, Iowa, and incorporated in the state of Iowa. MHC Inc., MidAmerican Funding and MEHC are also headquartered in Des Moines, Iowa.

The following is management's discussion and analysis of certain significant factors that have affected the consolidated financial condition and results of operations of MidAmerican Funding and its subsidiaries and MidAmerican Energy as presented in this joint filing. Information in Management's Discussion and Analysis related to MidAmerican Energy, whether or not segregated, also relates to MidAmerican Funding. Information related to other subsidiaries of MidAmerican Funding pertains only to the discussion of the financial condition and results of operations of MidAmerican Funding. Where necessary, discussions have been segregated under the heading "MidAmerican Funding" to allow the reader to identify information applicable only to MidAmerican Funding. Explanations include management's best estimate of the impact of weather, customer growth and other factors. This discussion should be read in conjunction with the historical unaudited Consolidated Financial Statements and Notes to Consolidated Financial Statements in Item 1 of this Form 10-Q. MidAmerican Energy's and MidAmerican Funding's actual results in the future could differ significantly from the historical results.

Results of Operations for the Second Quarter and First Six Months of 2013 and 2012

Overview

MidAmerican Energy -

MidAmerican Energy's earnings on common stock for the second quarter of 2013 was $23 million, a decrease of $57 million, or 71%, compared to 2012 primarily due to $16 million of federal income tax benefits recognized in 2012 related to an income tax method change, a $17 million decrease in recognized production tax credits, a $12 million decrease in regulated electric wholesale gross margin due to higher costs for purchased power, a $6 million decrease in nonregulated electric gross margin and an $18 million increase in maintenance expense principally for a generating facility outage and storm restoration. The decreases were partially offset by an $8 million increase in regulated gas gross margins primarily due to abnormally warm spring temperatures in 2012 and a $6 million increase in regulated electric retail gross margins primarily from adjustment clauses in Iowa and Illinois.

MidAmerican Energy's earnings on common stock for the first six months of 2013 was $126 million, a decrease of $28 million, or 18%, compared to 2012 due to $16 million of federal income tax benefits recognized in the second quarter of 2012 related to an income tax method change, a $21 million decrease in regulated electric wholesale gross margin due to higher costs for purchased power, a $9 million decrease in nonregulated electric gross margin, an $18 million increase in depreciation expense primarily as a result of additional wind-powered generating facilities placed in service in the second half of 2012, and a $17 million increase in maintenance expense principally for a generating facility outage and storm restoration. The decreases were partially offset by a $35 million increase in regulated electric retail gross margins from adjustment clauses in Iowa and Illinois and higher electric retail sales volumes due to colder temperatures in 2013 primarily from the unusually warm temperatures in 2012, which also contributed to higher gas retail sales volumes resulting in a $22 million increase in regulated gas gross margins.

MidAmerican Funding -

Net income attributable to MidAmerican Funding for the second quarter of 2013 was $21 million, a decrease of $56 million, or 73%, and for the first six months of 2013 was $121 million, a decrease of $27 million, or 18%, compared to 2012 due to the decreases in MidAmerican Energy's earnings discussed above.

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Regulated Electric Gross Margin

	Second Quarter									First Six Months
	2013		2012		Change					2013		2012		Change
Gross margin (in millions):
Operating revenue	$	411	$	404	$	7		2	%	$	826	$	784	$	42		5	%
Cost of fuel, energy and capacity	114		101		13			13		237		209		28			13
Gross margin	$	297	$	303	$	(6	)	(2	)	$	589	$	575	$	14		2
Sales (GWh):
Residential	1,371		1,383		(12		)	(1	)%	3,097		2,906		191			7	%
Small general service	998		1,017		(19		)	(2	)	2,032		2,009		23			1
Large general service	2,549		2,505		44			2		4,866		4,802		64			1
Other	389		392		(3		)	(1	)	787		782		5			1
Total retail	5,307		5,297		10			—		10,782		10,499		283			3
Wholesale	2,158		2,212		(54		)	(2	)	5,242		5,246		(4		)	—
Total sales	7,465		7,509		(44		)	(1	)	16,024		15,745		279			2
Average number of retail customers (in thousands)	738		733		5			1	%	738		733		5			1	%
Average revenue per MWh:
Retail	$	66.16	$	64.60	$	1.56		2	%	$	63.87	$	61.66	$	2.21		4	%
Wholesale	$	24.70	$	25.04	$	(0.34	)	(1	)%	$	23.69	$	23.74	$	(0.05	)	—	%
Heating degree days	733		400		333			83	%	4,056		2,846		1,210			43	%
Cooling degree days	306		432		(126		)	(29	)%	306		462		(156		)	(34	)%
Sources of energy (GWh)(1):
Coal	3,887		4,164		(277		)	(7	)%	8,524		8,991		(467		)	(5	)%
Nuclear	970		895		75			8		1,848		1,844		4			—
Natural gas	5		158		(153		)	(97	)	10		155		(145		)	(94	)
Wind and other(2)	1,890		1,649		241			15		4,109		3,438		671			20
Total energy generated	6,752		6,866		(114		)	(2	)	14,491		14,428		63			—
Energy purchased	820		884		(64		)	(7	)	1,818		1,728		90			5
Total	7,572		7,750		(178		)	(2	)	16,309		16,156		153			1

(1) GWh amounts are net of energy used by the related generating facilities.

(2) All or some of the renewable energy attributes associated with generation from these generating facilities may be: (a) used in future years to comply with renewable portfolio standards or other regulatory requirements or (b) sold to third parties in the form of renewable energy credits or other environmental commodities.

Electric gross margin for the second quarter of 2013 decreased $6 million compared to 2012. Retail gross margin increased $6 million compared to 2012 due to an increase of $8 million from adjustment clauses in Iowa and Illinois, partially offset by an increase in generation costs as a result of new coal transportation agreements effective in 2013 and higher transportation capacity charges for natural gas reduced by an increase in low-cost generation for retail. Retail sales volumes were relatively flat as an increase from customer growth was offset by a decrease due to the abnormally warm spring temperatures in 2012. Wholesale gross margin decreased $12 million compared to 2012 due to a lower average margin per megawatt hour sold primarily as a result of higher costs for purchased power. Wholesale includes sales of electricity principally to markets operated by regional transmission organizations.

31

Electric gross margin for the first six months of 2013 increased $14 million compared to 2012. Retail gross margin increased $35 million compared to 2012 due to an increase of $27 million from adjustment clauses implemented in Iowa and Illinois in the first half of 2012, a $7 million increase from higher sales volumes in 2013 primarily due to the unseasonably warm temperatures in the first quarter of 2012, customer growth and other usage factors, and a $3 million increase from recoveries through bill riders predominately for DSM program costs, partially offset by higher generation costs. The increase in generation costs for retail was due to new coal transportation agreements effective in 2013 and higher transportation capacity charges for natural gas reduced by an increase in low-cost generation for retail. Wholesale gross margin decreased $21 million compared to 2012 due to a lower average margin per megawatt hour sold as a result of higher costs for purchased power and an increase in generation costs primarily from new coal transportation agreements and higher transportation capacity charges for natural gas.

Regulated Gas Gross Margin

	Second Quarter									First Six Months
	2013		2012		Change					2013		2012		Change
Gross margin (in millions):
Operating revenue	$	142	$	91	$	51		56	%	$	457	$	354	$	103		29	%
Cost of gas sold	88		45		43			96		312		231		81			35
Gross margin	$	54	$	46	$	8		17		$	145	$	123	$	22		18
Natural gas throughput (000's Dth):
Residential	7,478		4,597		2,881			63	%	32,062		23,117		8,945			39	%
Small general service	3,798		2,578		1,220			47		15,773		11,632		4,141			36
Large general service	1,014		919		95			10		2,378		2,136		242			11
Other	11		4		7			*		33		23		10			43
Total retail sales	12,301		8,098		4,203			52		50,246		36,908		13,338			36
Wholesale sales	6,494		7,121		(627		)	(9	)	14,099		19,478		(5,379		)	(28	)
Total sales	18,795		15,219		3,576			23		64,345		56,386		7,959			14
Gas transportation service	17,260		16,798		462			3		39,248		37,536		1,712			5
Total gas throughput	36,055		32,017		4,038			13		103,593		93,922		9,671			10
Average number of retail customers (in thousands)	716		710		6			1	%	717		712		5			1	%
Average revenue per retail Dth sold	$	8.81	$	8.42	$	0.39		5	%	$	7.69	$	7.94	$	(0.25	)	(3	)%
Average cost of natural gas per retail Dth sold	$	5.02	$	3.55	$	1.47		41	%	$	5.14	$	5.01	$	0.13		3	%
Heating degree days	785		437		348			80	%	4,227		2,976		1,251			42	%

* Not meaningful.

Regulated gas revenue includes purchased gas adjustment clauses through which MidAmerican Energy is allowed to recover the cost of gas sold from its retail gas utility customers. Consequently, fluctuations in the cost of gas sold do not directly affect gross margin or net income because regulated gas revenue reflects comparable fluctuations through the purchased gas adjustment clauses. For the second quarter of 2013, MidAmerican Energy's combined retail and wholesale average per-unit cost of gas sold increased 58%, resulting in an increase of $30 million in gas revenue and cost of gas sold compared to 2012. Additionally, the increase in sales volumes compared to the second quarter of 2012, primarily due to abnormally warm spring temperatures in 2012, increased revenue and cost of gas sold for the second quarter of 2013. For the first six months of 2013, MidAmerican Energy's combined retail and wholesale average per-unit cost of gas sold increased 18%, resulting in an increase of $48 million in gas revenue and cost of gas sold compared to 2012. Additionally, the increase in sales volumes compared to the first six months of 2012, primarily from the unseasonably warm winter and spring temperatures in 2012, increased revenue and cost of gas sold for the first six months of 2013. The improvement in gas gross margin for the second quarter and first six months of 2013 was due to the increase in retail sales volumes primarily as a result of the unusual temperatures in 2012.

32

Regulated Operating Costs and Expenses

Other operating expenses for the second quarter of 2013 totaled $111 million, an increase of $11 million compared to 2012, and for the first six months of 2013, totaled $217 million, an increase of $15 million compared to 2012. The increases were primarily due to higher DSM program costs, which are matched by increases in regulated electric and gas revenue, general increases in and the timing of various operating costs and the write-off of Iowa carbon reduction study costs.

Maintenance expense for the second quarter of 2013 totaled $70 million, an increase of $18 million compared to 2012, and for the first six months of 2013, totaled $115 million, an increase of $17 million compared to 2012. The increases were primarily due to higher maintenance costs of $12 million related to an expanded scope of work for the Louisa Generating Station outage and higher storm restoration costs of $4 million.

Depreciation and amortization expense for the second quarter of 2013 totaled $104 million, an increase of $4 million compared to 2012, and for the first six months of 2013, totaled $211 million, an increase of $18 million compared to 2012, primarily due to additional wind-powered generating facilities placed in service in the second half of 2012, partially offset by a $5 million decrease in Iowa revenue sharing and a $2 million decrease in a regulatory expense related to nuclear decommissioning accruals.

Nonregulated Gross Margin

MidAmerican Energy -

	Second Quarter									First Six Months
	2013		2012		Change					2013		2012		Change
Gross margin (in millions):
Nonregulated operating revenue	$	204	$	214	$	(10	)	(5	)%	$	394	$	445	$	(51	)	(11	)%
Nonregulated cost of sales	190		193		(3		)	(2	)	364		405		(41		)	(10	)
Nonregulated gross margin	$	14	$	21	$	(7	)	(33	)	$	30	$	40	$	(10	)	(25	)
Nonregulated electric sales (GWh)	2,344		2,629		(285		)	(11	)%	4,514		5,096		(582		)	(11	)%
Nonregulated gas sales (000's Dth)	8,725		8,073		652			8	%	19,310		18,339		971			5	%

For the second quarter and first six months of 2013 compared to 2012, lower volumes, prices and costs for electric sales, partially offset by higher prices, costs and volumes for gas sales resulted in decreases to nonregulated operating revenue and cost of sales. Nonregulated gross margin decreased compared to the second quarter and first six months of 2012 due to lower average electric margins per unit and lower electric sales.

Non-Operating Income

MidAmerican Energy -

Allowance for equity funds for the second quarter and first six months of 2013 increased $1 million and $3 million, respectively, compared to 2012 due to higher construction work-in-progress balances primarily related to emissions control equipment at two of MidAmerican Energy's jointly owned generating facilities.

Fixed Charges

MidAmerican Energy -

Interest on long-term debt decreased $1 million and $3 million for the second quarter and first six months of 2013, respectively, as a result of MidAmerican Energy's redemption of $275 million of its 5.125% senior notes in June 2012, partially offset by an increase from interest expense on the larger balance of deferred payments for construction of wind-powered generating facilities.

33

Income Tax Benefit

MidAmerican Energy -

MidAmerican Energy's income tax benefit was $7 million for the second quarter of 2013, a decrease of $25 million compared to $32 million for 2012, with an effective tax rate of (41)% for 2013 and (65)% for 2012. MidAmerican Energy's income tax benefit was $30 million for the first six months of 2013, a decrease of $14 million compared to $44 million for 2012, with an effective tax rate of (31)% for 2013 and (40)% for 2012.

The change in the effective tax rates was primarily due to benefits recognized in the second quarter of 2012 related to a method change for deduction of repair costs, as discussed below, and a decrease in recognized production tax credits for the second quarter of 2013 compared to the second quarter of 2012 as a result of lower pre-tax income.

MidAmerican Energy's earnings for the second quarter and first six months of 2012, reflect $16 million of federal income tax benefits for income tax years prior to 2012 that were recognized in connection with MidAmerican Energy changing the method by which it determines current income tax deductions for repair costs related to its regulated utility electric transmission and distribution assets based on guidance published by the Internal Revenue Service. Application of this guidance results in current deductibility for those costs, which are capitalized for book purposes. MidAmerican Energy retroactively applied the method change, deducted amounts related to prior years' costs on its 2011 tax return and recognized the change in the second quarter of 2012. State utility rate regulation in Iowa requires the tax effect of certain temporary differences be flowed through immediately to customers. Therefore, certain deferred amounts that would otherwise have been recognized in income tax expense have been included as changes in regulatory assets.

Production tax credits are recognized in earnings for interim periods based on the application of an estimated annual effective tax rate to pretax earnings. Federal renewable electricity production tax credits are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities were placed in service. Production tax credits recognized in the second quarter of 2013 were $10 million, or $17 million lower than the second quarter of 2012, while production tax credits earned in the second quarter of 2013 were $43 million, or $7 million higher than the second quarter of 2012. Production tax credits recognized in the first six months of 2013 were $59 million, or $2 million higher than the first six months of 2012, while production tax credits earned in the first six months of 2013 were $95 million, or $19 million higher than the first six months of 2012 primarily due to wind-powered generation placed in service in late 2012. The difference between production tax credits recognized and earned of $36 million as of June 30, 2013 will be recorded in earnings over the remainder of 2013.

MidAmerican Funding -

MidAmerican Funding's income tax benefit was $9 million for the second quarter of 2013, a decrease of $24 million compared to $33 million for 2012, with an effective tax rate of (69)% for 2013 and (73)% for 2012. MidAmerican Funding's income tax benefit was $33 million for the first six months of 2013, a decrease of $15 million compared to $48 million for 2012, with an effective tax rate of (37)% for 2013 and (48)% for 2012. The decrease in effective tax rates was due principally to the factors discussed for MidAmerican Energy.

34

Liquidity and Capital Resources

As of June 30, 2013, MidAmerican Energy's total net liquidity was $596 million consisting of $186 million of cash and cash equivalents and $605 million of revolving credit facilities reduced by $195 million of the revolving credit facilities reserved to support MidAmerican Energy's variable-rate tax-exempt bond obligations. As of June 30, 2013, MidAmerican Funding's total net liquidity was $601 million, including $1 million of additional cash and cash equivalents and MHC Inc.'s $4 million revolving credit facility.

Operating Activities

MidAmerican Energy's net cash flows from operating activities for the six-month periods ended June 30, 2013 and 2012, were $302 million and $815 million, respectively. MidAmerican Funding's net cash flows from operating activities for the six-month periods ended June 30, 2013 and 2012, were $296 million and $810 million, respectively. The decreases were predominantly due to the timing of income tax cash flows with MEHC, partially offset by higher regulated electric and gas margins.

Investing Activities

MidAmerican Energy's net cash flows from investing activities for the six-month periods ended June 30, 2013 and 2012, were $(317) million and $(261) million, respectively. MidAmerican Funding's net cash flows from investing activities for the six-month periods ended June 30, 2013 and 2012, were $(316) million and $(261) million, respectively. Net cash flows from investing activities consist almost entirely of utility construction expenditures, which increased for 2013 principally due to expenditures for the construction of emissions control equipment at two of MidAmerican Energy's jointly owned generating facilities and the payment of payables related to 2012 construction expenditures. Purchases and proceeds related to available-for-sale securities consist of activity within the Quad Cities Generating Station nuclear decommissioning trust.

Financing Activities

MidAmerican Energy's net cash flows from financing activities for the six-month periods ended June 30, 2013 and 2012 were $(153) million and $(284) million, respectively. MidAmerican Funding's net cash flows from financing activities for the six-month periods ended June 30, 2013 and 2012, were $(147) million and $(278) million, respectively. In January 2013, MidAmerican Energy paid common dividends of $125 million to MHC Inc. and, in April 2013, paid $28 million for the redemption of all outstanding shares of its preferred securities. In June 2012, MidAmerican Energy redeemed $275 million of its 5.125% senior notes due January 2013. MidAmerican Funding paid $119 million in 2013 and received $6 million in 2012 through its note payable with MEHC.

Debt Authorizations and Related Matters

MidAmerican Energy has authority from the FERC to issue through October 30, 2014, commercial paper and bank notes aggregating $600 million at interest rates not to exceed the applicable London Interbank Offered Rate ("LIBOR") plus a spread of 400 basis points. MidAmerican Energy has a $600 million unsecured revolving credit facility expiring in March 2018. MidAmerican Energy may request that the banks extend the credit facility up to two years. The credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on LIBOR or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for its senior unsecured long-term debt securities. Additionally, MidAmerican Energy has a $5 million unsecured credit facility for general corporate purposes.

MidAmerican Energy currently has an effective registration statement with the United States Securities and Exchange Commission to issue up to $1.5 billion of long-term unsecured securities. Additionally, MidAmerican Energy has received authorization from the FERC effective August 17, 2013, to issue through August 16, 2015, long-term securities totaling up to $1.25 billion at interest rates not to exceed the applicable United States Treasury rate plus a spread of 200 basis points. Regarding multiple-year capital projects, MidAmerican Energy has authorizations from the ICC, expiring December 19, 2015, to issue up to an aggregate of $1.5 billion of long-term debt securities.

35

In conjunction with the March 1999 merger, MidAmerican Energy committed to the IUB to use commercially reasonable efforts to maintain an investment grade rating on its long-term debt and to maintain its common equity level above 42% of total capitalization unless circumstances beyond its control result in the common equity level decreasing to below 39% of total capitalization. MidAmerican Energy must seek the approval of the IUB of a reasonable utility capital structure if MidAmerican Energy's common equity level decreases below 42% of total capitalization, unless the decrease is beyond the control of MidAmerican Energy. MidAmerican Energy is also required to seek the approval of the IUB if MidAmerican Energy's equity level decreases to below 39%, even if the decrease is due to circumstances beyond the control of MidAmerican Energy. If MidAmerican Energy's common equity level were to drop below the required thresholds, MidAmerican Energy's ability to issue debt could be restricted. As of June 30, 2013, MidAmerican Energy's common equity ratio was 53% computed on a basis consistent with its commitment.

Future Uses of Cash

MidAmerican Energy and MidAmerican Funding have available a variety of sources of liquidity and capital resources, both internal and external, including net cash flows from operating activities, public and private debt offerings, the issuance of commercial paper, the use of unsecured revolving credit facilities, and other sources. These sources are expected to provide funds required for current operations, capital expenditures, debt retirements and other capital requirements. The availability and terms under which MidAmerican Energy and MidAmerican Funding have access to external financing depends on a variety of factors, including their credit ratings, investors' judgment of risk and conditions in the overall capital market, including the condition of the utility industry.

Utility Construction Expenditures

MidAmerican Energy's primary need for capital is utility construction expenditures. Capital expenditure needs are reviewed regularly by management and may change significantly as a result of these reviews, which may consider, among other factors, changes in environmental and other rules and regulations; impacts to customers' rates; outcomes of regulatory proceedings; changes in income tax laws; general business conditions; load projections; system reliability standards; the cost and efficiency of construction labor, equipment and materials; commodity prices; and the cost and availability of capital. Prudently incurred expenditures for compliance-related items such as pollution-control technologies, replacement generation[, nuclear decommissioning] and associated operating costs are generally incorporated into MidAmerican Energy's regulated retail rates.

MidAmerican Energy's forecasted utility construction expenditures, which exclude amounts for non-cash equity AFUDC and other non-cash items, are approximately $1.1 billion for 2013 and include:

• $356 million for the construction of 1,050 MW (nominal ratings) of wind-powered generating facilities expected to be placed in service in 2013, 2014 and 2015. Refer to additional discussion below.

• $203 million for emissions control equipment, primarily at George Neal Energy Center Units 3 and 4 and Ottumwa Generating Station to meet air quality targets, including the reduction of sulfur dioxide, nitrogen oxides and particulate matter emissions.

• $60 million for transmission system investments, including $22 million for Multi-Value Projects ("MVPs) approved by the Midcontinent Independent System Operator, Inc. ("MISO") for the construction of 245 miles of 345 kV transmission line located in Iowa and Illinois. In July 2013, MidAmerican Energy entered into a contract totaling $342 million related to its MVPs approved by MISO with minimum payments of $17 million in 2013, $140 million in 2014, $149 million in 2015 and $36 million in 2016.

• $19 million for other generation development projects.

• Remaining amounts are for ongoing investments in distribution, generation and other infrastructure needed to serve existing and expected demand.

36

In May 2013, MidAmerican Energy filed with the IUB an application for ratemaking principles, and, in July 2013, filed with the IUB a settlement agreement between MidAmerican Energy and the Iowa Office of Consumer Advocate for ratemaking principles, related to the construction of up to 1,050 MW (nominal ratings) of additional wind-powered generating facilities. The settlement agreement, which is subject to IUB approval, establishes a cost cap of $1.9 billion, including AFUDC, for the construction of 1,050 MW (nominal ratings) of wind-powered generating facilities and provides for a fixed rate of return on equity of 11.625% over the proposed 30-year useful lives of those facilities in any future Iowa rate proceeding. The cost cap ensures that as long as total costs are below the cap, the investment will be deemed prudent in any future Iowa rate proceeding. Until such time as these generation assets are reflected in rates, and ceasing thereafter, MidAmerican Energy proposes reductions in the energy adjustment clause recoveries proposed in its current Iowa electric rate request of $3 million in 2015, $7 million in 2016 and $10 million for each calendar year thereafter, conditioned upon MidAmerican Energy having completed at least 350 MW (nominal ratings) of wind-powered generating facilities pursuant to the settlement agreement. MidAmerican Energy has requested IUB approval in the third quarter of 2013. In July 2013, MidAmerican Energy entered into contracts totaling $1.1 billion related to these projects. Minimum payments are expected to be $199 million in 2013, $431 million in 2014 and $490 million in 2015. In order to qualify for federal production tax credits, construction of the facilities must begin by December 31, 2013.

Contractual Obligations

As of June 30, 2013, there have been no material changes outside the normal course of business in MidAmerican Energy's and MidAmerican Funding's contractual obligations from the information provided in Item 7 of their Annual Report on Form 10‑K for the year ended December 31, 2012, other than the 2013 capital expenditures matters previously discussed.

Regulatory Matters

In May 2013, MidAmerican Energy filed a request with the IUB for an increase in Iowa retail electric rates. MidAmerican Energy expects to begin collecting interim rates in the third quarter of 2013. The interim rates would be collected subject to refund pending a final decision by the IUB on MidAmerican Energy's requested rate increase. If approved, the proposed rate increase would be phased in over approximately three years and would result in equal annualized increases in revenues, above current rates, of $45 million, or 3.6%, effective with the start of interim rates and again on January 1, 2015 and 2016, for a total annualized increase of $135 million when fully implemented. In addition to the request for an increase in base rates, the filing contains a request for the creation of two new adjustment clauses to be effective with the implementation of final approved rates. One clause would be for the recovery of changes in certain energy production related costs such as fuel, fuel transportation and the impacts of the production tax credit. The second clause would be for recovery of certain electric transmission charges. The filing also proposes a revenue sharing mechanism similar to that in place at MidAmerican Energy for a number of years that shares with customers revenues related to equity returns above 11.5%. A final decision by the IUB on MidAmerican Energy's request is expected by the end of the first quarter of 2014.

Since 2010, MidAmerican Energy has been investigating the possible development of a nuclear generation facility. MidAmerican Energy has completed its investigation and concluded that it is currently premature to pursue any additional site work on a nuclear facility. MidAmerican Energy submitted its assessment to the IUB in June 2013. In support of such an investigation, Iowa law provided for recovery of the cost of this effort from MidAmerican Energy's Iowa customers over three years beginning in October 2010, subject to the review of the IUB.

37

Environmental Laws and Regulations

MidAmerican Energy is subject to federal, state and local laws and regulations regarding air and water quality, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. In addition to imposing continuing compliance obligations, these laws and regulations provide regulators with the authority to levy substantial penalties for noncompliance including fines, injunctive relief and other sanctions. These laws and regulations are administered by the EPA and various other state and local agencies. All such laws and regulations are subject to a range of interpretation, which may ultimately be resolved by the courts. Environmental laws and regulations continue to evolve, and MidAmerican Energy is unable to predict the impact of the changing laws and regulations on its operations and financial results. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations. Refer to "Liquidity and Capital Resources" for discussion of MidAmerican Energy's forecasted environmental-related capital expenditures. The discussion below contains material developments to those matters disclosed in Item 7 of MidAmerican Energy's and MidAmerican Funding's Annual Report on Form 10‑K for the year ended December 31, 2012.

Clean Air Act Regulations

The Clean Air Act is a federal law administered by the EPA that provides a framework for protecting and improving the nation's air quality and controlling sources of air emissions. The implementation of new standards is generally outlined in State Implementation Plans ("SIPs"), which are a collection of regulations, programs and policies to be followed. SIPs vary by state and are subject to public hearings and EPA approval. Some states may adopt additional or more stringent requirements than those implemented by the EPA.

In anticipation of the April 16, 2015, Mercury and Air Toxics Standards ("MATS") compliance deadline, MidAmerican Energy evaluated each of its coal-fueled units for compliance with the MATS emission limits. Due to the MATS compliance costs, MidAmerican Energy plans to retire four coal-fueled units by March 31, 2015. These units include Walter Scott, Jr. Energy Center Units 1 and 2 and George Neal Energy Center Units 1 and 2. A fifth unit, Riverside Generating Station, will be limited to natural gas combustion by March 31, 2015. The units being retired produced 2.2 million MWh of electricity, or 7% of MidAmerican Energy's owned generation production, during 2012. These planned retirements are independent of and precede the April 2016 deadline by which these five units had to stop burning solid fuel arising from the consent decree MidAmerican Energy previously agreed to with the Sierra Club.

National Ambient Air Quality Standards

In June 2010, the EPA finalized a new national ambient air quality standard for sulfur dioxide. Under the new rule, the existing 24-hour and annual standards for sulfur dioxide, which were 140 parts per billion measured over 24 hours and 30 parts per billion measured over an entire year, were replaced with a new one-hour standard of 75 parts per billion. The new rule utilizes a three-year average to determine attainment. The rule utilizes source modeling in addition to the installation of ambient monitors where sulfur dioxide emissions impact populated areas. Attainment designations were due by June 2012; however, due to the lack of sufficient information to make the designations, the EPA extended the deadline for area designations to June 2013. The EPA issued its final designations in July 2013 and determined that a portion of Muscatine County, Iowa was in nonattainment for the one-hour sulfur dioxide standard. MidAmerican Energy's Louisa coal-fueled generating facility is located just outside of Muscatine County, south of the violating monitor. In its final designation, the EPA indicated that it was not yet prepared to conclude that the emissions from the Louisa coal-fueled generating facility contribute to the monitored violation or to other possible violations and that in a subsequent round of designations the EPA will make decisions for areas and sources outside Muscatine County. MidAmerican Energy does not believe a subsequent nonattainment designation will have a material impact on the Louisa coal-fueled generating facility.

38

Climate Change

In April 2012, the EPA proposed New Source Performance Standards for GHG at new fossil-fueled generating facilities at an emissions rate of 1,000 pounds per MWh, which are expected to be finalized in 2013. The EPA is also under a consent decree to establish GHG emissions performance standards for existing and modified sources.

GHG New Source Performance Standards

Under the Clean Air Act, the EPA may establish emissions standards that reflect the degree of emissions reductions achievable through the best technology that has been demonstrated, taking into consideration the cost of achieving those reductions and any non-air quality health and environmental impact and energy requirements. The EPA entered into a settlement agreement with a number of parties, including certain state governments and environmental groups, in December 2010 to promulgate emissions standards covering GHG. In April 2012, the EPA proposed new source performance standards for new fossil-fueled generating facilities that would limit emissions of carbon dioxide to 1,000 pounds per MWh. The April 2012 proposal exempted simple cycle combustion turbines from meeting the GHG standards. In June 2013, the President announced a national climate change strategy and issued a presidential memorandum requiring the EPA to issue a re-proposed GHG new source performance standard for fossil-fueled generating facilities by September 2013. Any new fossil-fueled generating facilities constructed by MidAmerican Energy will be required to meet the final GHG new source performance standards. The presidential memorandum also requires the EPA to propose standards or guidelines for existing and modified fossil-fueled generating facilities by June 2014, to finalize those standards or guidelines by June 2015, and to require states to submit SIPs that comply with those standards or guidelines by June 2016. Until the standards or guidelines for existing, modified or reconstructed units are proposed and finalized, the impact on MidAmerican Energy's existing facilities cannot be determined.

GHG Litigation

In October 2009, the United States District Court for the Northern District of California ("Northern District of California") granted the defendants' motions to dismiss in the case of Native Village of Kivalina v. ExxonMobil Corporation, et al. The plaintiffs filed their complaint in February 2008, asserting claims against 24 defendants, including electric generating companies, oil companies and a coal company, for public nuisance under state and federal common law based on the defendants' GHG emissions. MEHC was a named defendant in the Kivalina case. The Northern District of California dismissed all of the plaintiffs' federal claims, holding that the court lacked subject matter jurisdiction to hear the claims under the political question doctrine, and that the plaintiffs lacked standing to bring their claims. The Northern District of California declined to hear the state law claims and the case was dismissed without prejudice to their future presentation in an appropriate state court. In November 2009, the plaintiffs appealed the case to the United States Ninth Circuit Court of Appeals ("Ninth Circuit"). In September 2012, the Ninth Circuit issued its opinion affirming the Northern District of California's dismissal of the plaintiffs' complaint. The Ninth Circuit held that the Clean Air Act displaced the plaintiffs' federal common law claims. In October 2012, the plaintiffs filed a petition for a full rehearing by the Ninth Circuit, which was denied by the Ninth Circuit in November 2012. In February 2013, the plaintiffs filed a petition with the United States Supreme Court to review the Ninth Circuit's decision. In May 2013, the United States Supreme Court denied the petition.

39

Collateral and Contingent Features

Debt and preferred securities of MidAmerican Energy are rated by credit rating agencies. Assigned credit ratings are based on each rating agency's assessment of MidAmerican Energy's ability to, in general, meet the obligations of its issued debt or preferred securities. The credit ratings are not a recommendation to buy, sell or hold securities, and there is no assurance that a particular credit rating will continue for any given period of time. As of June 30, 2013, MidAmerican Energy's credit ratings for its senior unsecured debt from the three recognized credit rating agencies were investment grade.

MidAmerican Funding and MidAmerican Energy have no credit rating downgrade triggers that would accelerate the maturity dates of its outstanding debt, and a change in ratings is not an event of default under the applicable debt instruments. MidAmerican Energy's unsecured revolving credit facilities do not require the maintenance of a minimum credit rating level in order to draw upon its availability but, under certain instances, sufficient covenant tests must be maintained if ratings drop below a certain level. However, commitment fees and interest rates under the credit facilities are tied to credit ratings and increase or decrease when the ratings change. A ratings downgrade could also increase the future cost of commercial paper, short- and long-term debt issuances or new credit facilities.

In accordance with industry practice, certain wholesale agreements, including derivative contracts, contain provisions that require MidAmerican Energy to maintain specific credit ratings on its unsecured debt from one or more of the three recognized credit rating agencies. These agreements 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. If all credit-risk-related contingent features or adequate assurance provisions for these agreements had been triggered as of June 30, 2013, MidAmerican Energy would have been required to post $174 million 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. Refer to Note 8 of Notes to Financial Statements in Item 1 of this Form 10-Q for a discussion of MidAmerican Energy's collateral requirements specific to its derivative contracts.

New Accounting Pronouncements

For a discussion of new accounting pronouncements affecting MidAmerican Energy and MidAmerican Funding, refer to Note 2 of Notes to Consolidated Financial Statements in Item 1 of this Form 10-Q.

Critical Accounting Estimates

Certain accounting measurements require management to make estimates and judgments concerning transactions that will be settled several years in the future. Amounts recognized on the Consolidated Financial Statements based on such estimates involve numerous assumptions subject to varying and potentially significant degrees of judgment and uncertainty and will likely change in the future as additional information becomes available. Estimates are used for, but not limited to, the accounting for the effects of certain types of regulation, derivatives, impairment of goodwill and long-lived assets, pension and other postretirement benefits, income taxes and revenue recognition - unbilled revenue. For additional discussion of MidAmerican Energy's and MidAmerican Funding's critical accounting estimates, see Item 7 of their Annual Report on Form 10-K for the year ended December 31, 2012. There have been no significant changes in MidAmerican Energy's and MidAmerican Funding's assumptions regarding critical accounting estimates since December 31, 2012.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

For quantitative and qualitative disclosures about market risk affecting MidAmerican Energy and MidAmerican Funding, see Item 7A of their Annual Report on Form 10-K for the year ended December 31, 2012. MidAmerican Energy's and MidAmerican Funding's exposure to market risk and their management of such risk has not changed materially since December 31, 2012. Refer to Note 8 of Notes to Financial Statements in Item 1 of this Form 10-Q for disclosure of MidAmerican Energy's derivative positions as of June 30, 2013.

Item 4. Controls and Procedures

At the end of the period covered by this Quarterly Report on Form 10-Q, the Company (MidAmerican Energy or MidAmerican Funding, as applicable) carried out an evaluation, under the supervision and with the participation of the Company's management, including the Chief Executive Officer (principal executive officer) and the Chief Financial Officer (principal financial officer), of the effectiveness of the design and operation of the Company's disclosure controls and procedures (as defined in Rule 13a-15(e) promulgated under the Securities and Exchange Act of 1934, as amended). Based upon that evaluation, the Company's management, including the Chief Executive Officer (principal executive officer) and the Chief Financial Officer (principal financial officer), concluded that the Company's disclosure controls and procedures were effective to ensure that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the United States Securities and Exchange Commission's rules and forms, and is accumulated and communicated to management, including the Company's Chief Executive Officer (principal executive officer) and Chief Financial Officer (principal financial officer), or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. There has been no change in the Company's internal control over financial reporting during the quarter ended June 30, 2013, that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

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PART II

Item 1. Legal Proceedings

None.

Item 1A. Risk Factors

There has been no material change to MidAmerican Funding's or MidAmerican Energy's risk factors from those disclosed in Item 1A of their Annual Report on Form 10-K for the year ended December 31, 2012.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Not applicable.

Item 3. Defaults Upon Senior Securities

Not applicable.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Not applicable.

Item 6. Exhibits

The exhibits listed on the accompanying Exhibit Index are filed as part of this Quarterly Report.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	MIDAMERICAN FUNDING, LLC
	MIDAMERICAN ENERGY COMPANY
	(Registrants)
Date: August 2, 2013	/s/  Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Controller
	of MidAmerican Funding, LLC
	and Vice President and Chief Financial Officer
	of MidAmerican Energy Company
	(principal financial and accounting officer)

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EXHIBIT INDEX

Exhibit No. Description

MidAmerican Energy

15 Awareness Letter of Independent Registered Public Accounting Firm.

31.1 Principal Executive Officer Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.2 Principal Executive Officer Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.1 Principal Executive Officer Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.2 Principal Executive Officer Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

MidAmerican Funding

31.3 Principal Executive Officer Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

31.4 Principal Executive Officer Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

32.3 Principal Executive Officer Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

32.4 Principal Executive Officer Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

MidAmerican Energy and MidAmerican Funding

101 The following financial information from MidAmerican Energy's and MidAmerican Funding's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013, is formatted in XBRL (eXtensible Business Reporting Language) and included herein: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Operations, (iii) the Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Changes in Equity, (v) the Consolidated Statements of Cash Flows, and (vi) the Notes to Consolidated Financial Statements, tagged in summary and detail.

44

EX-15

EXHIBIT 15

August 2, 2013

MidAmerican Energy Company

Des Moines, Iowa

We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited consolidated interim financial information of MidAmerican Energy Company and subsidiary for the periods ended June 30, 2013 and 2012, as indicated in our report dated August 2, 2013; because we did not perform an audit, we expressed no opinion on that information.

We are aware that our report referred to above, which is included in your Quarterly Report on Form 10-Q for the quarter ended June 30, 2013, is incorporated by reference in Registration Statement No. 333-187686 on Form S-3.

We also are aware that the aforementioned report, pursuant to Rule 436(c) under the Securities Act of 1933, is not considered a part of the Registration Statement prepared or certified by an accountant or a report prepared or certified by an accountant within the meaning of Sections 7 and 11 of that Act.

/s/ Deloitte & Touche LLP

Des Moines, Iowa

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, William J. Fehrman, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Energy Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2013	/s/ William J. Fehrman
	William J. Fehrman
	President and Chief Executive Officer
	(principal executive officer)

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas B. Specketer, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Energy Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2013	/s/ Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Chief Financial Officer
	(principal financial officer)

EX-31.3

EXHIBIT 31.3

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, William J. Fehrman, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Funding, LLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2013	/s/ William J. Fehrman
	William J. Fehrman
	President
	(principal executive officer)

EX-31.4

EXHIBIT 31.4

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas B. Specketer, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Funding, LLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 2, 2013	/s/ Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Controller
	(principal financial officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, William J. Fehrman, President and Chief Executive Officer of MidAmerican Energy Company (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of my knowledge:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 2, 2013	/s/ William J. Fehrman
	William J. Fehrman
	President and Chief Executive Officer
	(principal executive officer)

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas B. Specketer, Vice President and Chief Financial Officer of MidAmerican Energy Company (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of my knowledge:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 2, 2013	/s/ Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Chief Financial Officer
	(principal financial officer)

EX-32.3

EXHIBIT 32.3

CERTIFICATION PURSUANT TO

SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, William J. Fehrman, President of MidAmerican Funding, LLC (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of my knowledge:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 2, 2013	/s/ William J. Fehrman
	William J. Fehrman
	President
	(principal executive officer)

EX-32.4

EXHIBIT 32.4

CERTIFICATION PURSUANT TO

SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas B. Specketer, Vice President and Controller of MidAmerican Funding, LLC (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of my knowledge:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

Date: August 2, 2013	/s/ Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Controller
	(principal financial officer)

XML

Preferred Securities (MEC) Preferred Securities (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Class of Stock [Line Items]

Preferred Stock [Text Block]

(4) Preferred Securities

In April 2013, MidAmerican Energy redeemed all of the outstanding shares of its preferred securities at the stated redemption prices, which in aggregate totaled $28 million, plus accrued dividends.

XML

Risk Management and Hedging Activities (MEC) Balance Sheet Location (Details) (MidAmerican Energy Company [Member], Commodity Contract [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Mar. 31, 2013	Dec. 31, 2012		Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net	$ (50)			$ (77)
Cash collateral, net receivable (payable), offset against derivatives	2			7
Total derivatives - net of collateral	(48)			(70)
Current Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net	3			6
Cash collateral, net receivable (payable), offset against derivatives	0			0
Total derivatives - net of collateral	3			6
Other Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net	1			1
Cash collateral, net receivable (payable), offset against derivatives	0			0
Total derivatives - net of collateral	1			1
Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net	(42)			(61)
Cash collateral, net receivable (payable), offset against derivatives	2			6
Total derivatives - net of collateral	(40)			(55)
Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net	(12)			(23)
Cash collateral, net receivable (payable), offset against derivatives	0			1
Total derivatives - net of collateral	(12)			(22)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	26	[1]		28	[1]
Commodity liabilities	(50)	[1]		(73)	[1]
Total derivative assets (liabilities), net	(24)	[1]		(45)	[1]
Net regulatory asset	23		24	45		63	60	73
Not Designated as Hedging Instrument [Member] | Current Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	18	[1]		18	[1]
Commodity liabilities	(15)	[1]		(12)	[1]
Total derivative assets (liabilities), net	3	[1]		6	[1]
Not Designated as Hedging Instrument [Member] | Other Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	3	[1]		1	[1]
Commodity liabilities	(1)	[1]		0	[1]
Total derivative assets (liabilities), net	2	[1]		1	[1]
Not Designated as Hedging Instrument [Member] | Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	5	[1]		7	[1]
Commodity liabilities	(31)	[1]		(47)	[1]
Total derivative assets (liabilities), net	(26)	[1]		(40)	[1]
Not Designated as Hedging Instrument [Member] | Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	0	[1]		2	[1]
Commodity liabilities	(3)	[1]		(14)	[1]
Total derivative assets (liabilities), net	(3)	[1]		(12)	[1]
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	2			2
Commodity liabilities	(28)			(34)
Total derivative assets (liabilities), net	(26)			(32)
Designated as Hedging Instrument [Member] | Current Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	0			0
Commodity liabilities	0			0
Total derivative assets (liabilities), net	0			0
Designated as Hedging Instrument [Member] | Other Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	(1)			0
Commodity liabilities	0			0
Total derivative assets (liabilities), net	(1)			0
Designated as Hedging Instrument [Member] | Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	2			1
Commodity liabilities	(18)			(22)
Total derivative assets (liabilities), net	(16)			(21)
Designated as Hedging Instrument [Member] | Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	1			1
Commodity liabilities	(10)			(12)
Total derivative assets (liabilities), net	$ (9)			$ (11)

[1] MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2013 and December 31, 2012, a net regulatory asset of $23 million and $45 million, respectively, was recorded related to the net derivative liability of $24 million and $45 million, respectively.

XML

Statements of Comprehensive Income (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Net income	$ 24	$ 81	$ 127	$ 155
Other comprehensive income (loss), net of tax:
Unrealized (losses) gains on cash flow hedges, net of tax of $(10), $5, $2 and $(6)	(14)	7	4	(7)
Total other comprehensive income (loss), net of tax			4	(7)
Comprehensive income	$ 10	$ 88	$ 131	$ 148

XML

Consolidated Statements of Comprehensive Income (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Net income	$ 22	$ 78	$ 122	$ 149
Other comprehensive income (loss), net of tax:
Unrealized (losses) gains on cash flow hedges, net of tax of $(10), $5, $2 and $(6)	(14)	7	4	(7)
Total other comprehensive income (loss), net of tax			4	(7)
Comprehensive income	8	85	126	142
Comprehensive income attributable to noncontrolling interests	1	1	1	1
Comprehensive income attributable to MidAmerican Funding member	$ 7	$ 84	$ 125	$ 141

XML

Segment Information (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

(11) Segment Information

MidAmerican Energy has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost.

The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Total operating revenue	$	757	$	709	$	1,677	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Total operating income	$	43	$	81	$	149	$	173

	As of
	June 30, 2013		December 31, 2012
Total assets:
Regulated electric	$	9,912	$	9,898
Regulated gas	1,053		1,202
Nonregulated energy	127		132
Total assets	$	11,092	$	11,232

XML

Segment Information (LLC) (Details) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013 ReportableSegments		Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of Reportable Segments				3
Regulated electric	$ 411		$ 404	$ 826		$ 784
Regulated gas	142		91	457		354
Nonregulated	206		214	397		445
Total operating revenue	759		709	1,680		1,583
Depreciation and amortization	104		100	211		193
Total operating income	43		81	149		172
Assets	12,387	[1]		12,387	[1]		12,530	[1]
Regulated electric [Member]
Segment Reporting Information [Line Items]
Regulated electric	411		404	826		784
Depreciation and amortization	95		91	193		175
Total operating income	31		66	81		114
Assets	11,103	[1]		11,103	[1]		11,089	[1]
Regulated gas [Member]
Segment Reporting Information [Line Items]
Regulated gas	142		91	457		354
Depreciation and amortization	9		9	18		18
Total operating income	4		1	49		31
Assets	1,131	[1]		1,131	[1]		1,280	[1]
Nonregulated energy [Member]
Segment Reporting Information [Line Items]
Nonregulated	204		214	394		445
Total operating income	8		14	19		28
Assets	127	[1]		127	[1]		132	[1]
Other [Member]
Segment Reporting Information [Line Items]
Nonregulated	2		0	3		0
Total operating income	0		0	0		(1)
Assets	$ 26	[1]		$ 26	[1]		$ 29	[1]

[1] (1)Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

XML

Risk Management and Hedging Activities (MEC) Designated as Hedging Contracts (Details) (MidAmerican Energy Company [Member], Designated as Hedging Instrument [Member], Commodity Contract [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member] | Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Accumulated Other Comprehensive (Income) Loss, Net, Derivatives [Roll Forward]
Beginning balance	$ 2	$ 68	$ 32	$ 43
Changes in fair value recognized in OCI	25	2	0	40
Net losses reclassified to nonregulated cost of sales	(1)	(14)	(6)	(27)
Ending balance	26	56	26	56
Cash Flow Hedge Ineffectiveness is Immaterial			insignificant	insignificant
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 16

XML

Recent Financing Transactions (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Debt Instrument [Line Items]

Debt Disclosure [Text Block]

(5) Recent Financing Transactions

In March 2013, MidAmerican Energy replaced its $530 million unsecured revolving credit facility, which had been set to expire in July 2013, with a $600 million unsecured revolving credit facility expiring in March 2018. The new credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the London Interbank Offered Rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for its senior unsecured long-term debt securities. As of June 30, 2013, MidAmerican Energy had no borrowings outstanding under this credit facility. The credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.

XML

Preferred Securities (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
MidAmerican Energy Company [Member]
Class of Stock [Line Items]
Stock Redeemed or Called During Period, Value	$ 28

XML

Risk Management and Hedging Activities (MEC) Derivative Contract Volumes (Details) (MidAmerican Energy Company [Member], Commodity Contract [Member])	Jun. 30, 2013 MWh	Dec. 31, 2012 MWh
Electricity purchases (in megawatt hours) [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount	5,000,000	5,000,000
Natural gas purchases (in decatherms) [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount	23,000,000	36,000,000

XML

Components of Accumulated Other Comprehensive Loss, Net (MEC) (Tables) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The following table shows the change in AOCI by each component of other comprehensive income, net of applicable income taxes, for the six-month period ended June 30, 2013 (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			Losses on			Other
	Available-For-Sale			Cash Flow			Comprehensive
	Securities			Hedges			Loss, Net
Balance, December 31, 2012	$	(5	)	$	(19	)	$	(24	)
Other comprehensive income	—			4			4
Balance, June 30, 2013	$	(5	)	$	(15	)	$	(20	)

XML

New Accounting Pronouncements (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Accounting Changes and Error Corrections [Text Block]

(2) New Accounting Pronouncements

Refer to Note 2 of MidAmerican Energy's Notes to Financial Statements.

XML

General (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

(1) General

MidAmerican Funding, LLC ("MidAmerican Funding") is an Iowa limited liability company with MidAmerican Energy Holdings Company ("MEHC") as its sole member. MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway"). MidAmerican Funding's direct, wholly owned subsidiary is MHC Inc. ("MHC"), which constitutes substantially all of MidAmerican Funding's assets, liabilities and business activities except those related to MidAmerican Funding's long-term debt securities. MHC conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's principal subsidiary is MidAmerican Energy Company ("MidAmerican Energy"), a public utility with electric and natural gas operations. Direct, wholly owned nonregulated subsidiaries of MHC are Midwest Capital Group, Inc. and MEC Construction Services Co.

The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Consolidated Financial Statements as of June 30, 2013, and for the three- and six-month periods ended June 30, 2013 and 2012. The results of operations for the three- and six-month periods ended June 30, 2013, are not necessarily indicative of the results to be expected for the full year.

The preparation of the unaudited Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Consolidated Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Consolidated Financial Statements. Note 2 of Notes to Consolidated Financial Statements included in MidAmerican Funding's Annual Report on Form 10-K for the year ended December 31, 2012, describes the most significant accounting policies used in the preparation of the unaudited Consolidated Financial Statements. There have been no significant changes in MidAmerican Funding's assumptions regarding significant accounting estimates and policies during the six-month period ended June 30, 2013.

XML

Segment Information (LLC) (Tables) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

MidAmerican Funding has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the nonregulated subsidiaries of MidAmerican Funding not engaged in the energy business and parent company interest expense. The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Other	2		—		3		—
Total operating revenue	$	759	$	709	$	1,680	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Other	—		—		—		(1		)
Total operating income	$	43	$	81	$	149	$	172

	As of
	June 30, 2013		December 31, 2012
Total assets(1):
Regulated electric	$	11,103	$	11,089
Regulated gas	1,131		1,280
Nonregulated energy	127		132
Other	26		29
Total assets	$	12,387	$	12,530

(1) Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

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Fair Value Measurements (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Value Disclosures [Text Block]

(9) Fair Value Measurements

Refer to Note 9 of MidAmerican Energy's Notes to Financial Statements. MidAmerican Funding's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of MidAmerican Funding's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Funding's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,592	$	4,012	$	3,584	$	4,186

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Employee Benefit Plans (MEC) (Tables) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Net periodic benefit cost 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,
	2013			2012			2013			2012
Pension:
Service cost	$	4		$	5		$	9		$	9
Interest cost	8			9			16			18
Expected return on plan assets	(11		)	(12		)	(22		)	(22		)
Net amortization	2			1			5			2
Net periodic benefit cost	$	3		$	3		$	8		$	7
Other postretirement:
Service cost	$	1		$	1		$	2		$	2
Interest cost	2			2			4			4
Expected return on plan assets	(4		)	(3		)	(7		)	(6		)
Net amortization	—			(2		)	(1		)	(2		)
Net periodic benefit cost (benefit)	$	(1	)	$	(2	)	$	(2	)	$	(2	)

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Recent Financing Transactions (MEC) Recent Financing Transactions (Details) (MidAmerican Energy Company [Member], Line of Credit [Member], USD $)		1 Months Ended		6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013 Unsecured credit facility, $530 million, expiring July 2013 [Member]	Jun. 30, 2013 Unsecured credit facility, $530 million, expiring July 2013 [Member]	Jun. 30, 2013 Unsecured credit facility, $600 million, expiring March 2018 [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 530,000,000	$ 600,000,000
Line of Credit Facility, Expiration Date		Jul. 31, 2013		Mar. 31, 2018
Line of Credit Facility, Amount Outstanding				$ 0
Debt to capitalization ratio	0.65

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Income Taxes (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Income Taxes [Line Items]

Income Tax Disclosure [Text Block]

(6) Income Taxes

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(75	)	(60	)	(66	)	(57	)
State income tax, net of federal income tax benefit	(8	)	(13	)	(3	)	(9	)
Income tax method change	—		(36	)	—		(16	)
Effects of ratemaking	(20	)	(4	)	(4	)	(3	)
Other, net	(1	)	5		1		2
Effective income tax rate	(69	)%	(73	)%	(37	)%	(48	)%

Income tax credits relate primarily to production tax credits earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities were placed in service.

MidAmerican Energy's earnings for the three- and six-month periods ended June 30, 2012, reflect $16 million of federal income tax benefits recognized in connection with an income tax method change for income tax years prior to 2012. MidAmerican Energy changed the method by which it determines current income tax deductions for repair costs related to its regulated utility electric transmission and distribution assets based on guidance published by the Internal Revenue Service. Application of this guidance results in current deductibility for those costs, which are capitalized for book purposes. MidAmerican Energy retroactively applied the method change, deducted amounts related to prior years' costs on its 2011 tax return and recognized the change in the second quarter of 2012. State utility rate regulation in Iowa requires the tax effect of certain temporary differences be flowed through immediately to customers. Therefore, certain deferred amounts that would otherwise have been recognized in income tax expense have been included as changes in regulatory assets.

Berkshire Hathaway includes MEHC and subsidiaries in its United States federal income tax return. Consistent with established regulatory practice, MidAmerican Funding's and MidAmerican Energy's provisions for income taxes have been computed on a stand-alone basis, and substantially all of their currently payable or receivable income taxes are remitted to or received from MEHC. MidAmerican Funding made net cash payments for income taxes to MEHC totaling $86 million for the six-month period ended June 30, 2013, and received net cash receipts for income taxes totaling $498 million for the six-month period ended June 30, 2012.

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Other Related Party Transactions (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Related Party Transaction [Line Items]
Coal transportation services costs, railroad	$ 38	$ 89
BNSF Railway Company [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current	$ 5	$ 5

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Segment Information (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 ReportableSegments	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of Reportable Segments			3
Regulated electric	$ 411	$ 404	$ 826	$ 784
Regulated gas	142	91	457	354
Nonregulated energy	204	214	394	445
Total operating revenue	757	709	1,677	1,583
Depreciation and amortization	104	100	211	193
Total operating income	43	81	149	173
Assets	11,092		11,092		11,232
Regulated electric [Member]
Segment Reporting Information [Line Items]
Regulated electric	411	404	826	784
Depreciation and amortization	95	91	193	175
Total operating income	31	66	81	114
Assets	9,912		9,912		9,898
Regulated gas [Member]
Segment Reporting Information [Line Items]
Regulated gas	142	91	457	354
Depreciation and amortization	9	9	18	18
Total operating income	4	1	49	31
Assets	1,053		1,053		1,202
Nonregulated energy [Member]
Segment Reporting Information [Line Items]
Nonregulated energy	204	214	394	445
Total operating income	8	14	19	28
Assets	$ 127		$ 127		$ 132

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Segment Information (MEC) (Tables) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

MidAmerican Energy has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost.

The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Total operating revenue	$	757	$	709	$	1,677	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Total operating income	$	43	$	81	$	149	$	173

	As of
	June 30, 2013		December 31, 2012
Total assets:
Regulated electric	$	9,912	$	9,898
Regulated gas	1,053		1,202
Nonregulated energy	127		132
Total assets	$	11,092	$	11,232

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Other Related Party Transactions (MEC) Other Related Party Transactions (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Related Party Transaction [Line Items]

Related Party Transactions Disclosure [Text Block]

(12) Other Related Party Transactions

In 2012, MidAmerican Energy signed new long-term rail transportation contracts with BNSF Railway Company ("BNSF"), an affiliate company, and Union Pacific Railroad Company ("UP") for the transportation of coal to all of the MidAmerican Energy-operated coal-fueled generating facilities. These contracts replaced a long-term contract with UP that expired December 31, 2012. For the three- and six-month periods ended June 30, 2013, $38 million and $89 million, respectively, was incurred for coal transportation services, the majority of which was related to the BNSF agreement. As of June 30, 2013, MidAmerican Energy had accounts payable to BNSF of $5 million.

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Statements of Changes in Equity (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	MidAmerican Energy Company [Member] USD ($)	MidAmerican Energy Company [Member] Common Stock [Member] USD ($)	MidAmerican Energy Company [Member] Retained Earnings [Member] USD ($)	MidAmerican Energy Company [Member] Accumulated Other Comprehensive Loss, Net [Member] USD ($)	MidAmerican Energy Company [Member] Preferred Securities [Member] USD ($)	MidAmerican Energy Company [Member] Noncontrolling Interests [Member] USD ($)
Balance at Dec. 31, 2011	$ 3,272	$ 562	$ 2,716	$ (34)	$ 27	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	155		155			0
Other comprehensive income (loss)	(7)			(7)		0
Dividends, Preferred Stock, Cash	(1)		(1)
Balance at Jun. 30, 2012	3,419	562	2,870	(41)	27	1
Balance at Mar. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	81
Balance at Jun. 30, 2012	3,419	562			27
Balance at Dec. 31, 2012	3,635	562	3,070	(24)	27	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	127		127			0
Other comprehensive income (loss)	4			4		0
Redemption of preferred securities	(28)	(1)			(27)
Common dividends	(125)		(125)
Balance at Jun. 30, 2013	3,613	561	3,072	(20)	0	0
Balance at Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	24
Balance at Jun. 30, 2013	$ 3,613

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Consolidated Balance Sheets (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Utility plant, net:
Electric	$ 11,527		$ 11,416
Gas	1,316		1,301
Gross utility plant in service	12,843		12,717
Accumulated depreciation and amortization	(4,575)		(4,413)
Utility plant in service, net	8,268		8,304
Construction work in progress	431		318
Total utility plant, net	8,699		8,622
Current assets:
Cash and cash equivalents	187		354
Receivables, net	382		418
Income taxes receivable	16		0
Inventories	216		240
Other	73		57
Total current assets	874		1,069
Other assets:
Goodwill	1,270		1,270
Regulatory assets	844		876
Investments and nonregulated property, net	579		561
Other	121		132
Total other assets	2,814		2,839
Total assets	12,387	[1]	12,530	[1]
Capitalization:
MidAmerican Funding member's equity	4,449		4,324
Noncontrolling interests	0		27
Long-term debt, excluding current portion	2,923		2,915
Total capitalization	7,372		7,266
Current liabilities:
Current portion of long-term debt	669		669
Note payable to affiliate	127		246
Accounts payable	300		386
Taxes accrued	113		227
Interest accrued	48		35
Other	120		120
Total current liabilities	1,377		1,683
Other liabilities:
Deferred income taxes	2,218		2,162
Asset retirement obligations	326		318
Regulatory liabilities	775		750
Other	319		351
Total other liabilities	3,638		3,581
Total capitalization and liabilities	$ 12,387		$ 12,530

[1] (1)Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

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Consolidated Statements of Comprehensive Income (LLC) (Parenthetical) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Unrealized (losses) gains on cash flow hedges, tax	$ (10)	$ 5	$ 2	$ (6)

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Consolidated Statements of Operations (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Operating revenue:
Regulated electric	$ 411	$ 404	$ 826	$ 784
Regulated gas	142	91	457	354
Nonregulated	206	214	397	445
Total operating revenue	759	709	1,680	1,583
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	114	101	237	209
Cost of gas sold	88	45	312	231
Other operating expenses	111	100	217	202
Maintenance	70	52	115	98
Depreciation and amortization	104	100	211	193
Property and other taxes	30	30	60	59
Total regulated operating costs and expenses	517	428	1,152	992
Nonregulated operating costs and expenses:
Cost of sales	191	193	365	405
Other	8	7	14	14
Total nonregulated operating costs and expenses	199	200	379	419
Total operating costs and expenses	716	628	1,531	1,411
Operating income	43	81	149	172
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	4	3	8	5
Other, net	4	1	10	6
Total non-operating income	9	5	19	12
Fixed charges:
Interest on long-term debt	40	42	81	84
Other interest expense	1	0	1	1
Allowance for borrowed funds	(2)	(1)	(3)	(2)
Total fixed charges	39	41	79	83
Income before income tax (benefit) expense	13	45	89	101
Income tax (benefit) expense	(9)	(33)	(33)	(48)
Net income	22	78	122	149
Net income attributable to noncontrolling interests	1	1	1	1
Net income attributable to MidAmerican Funding member	$ 21	$ 77	$ 121	$ 148

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

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

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 Balance Sheets (in millions):

	Current Assets - Other			Other Assets - Other			Current Liabilities - Other			Other Liabilities - Other			Total
As of June 30, 2013:
Not designated as hedging contracts(1):
Commodity assets	$	18		$	3		$	5		$	—		$	26
Commodity liabilities	(15		)	(1		)	(31		)	(3		)	(50		)
Total	3			2			(26		)	(3		)	(24		)
Designated as hedging contracts:
Commodity assets	—			(1		)	2			1			2
Commodity liabilities	—			—			(18		)	(10		)	(28		)
Total	—			(1		)	(16		)	(9		)	(26		)
Total derivatives	3			1			(42		)	(12		)	(50		)
Cash collateral receivable	—			—			2			—			2
Total derivatives - net basis	$	3		$	1		$	(40	)	$	(12	)	$	(48	)

	Current Assets - Other			Other Assets - Other		Current Liabilities - Other			Other Liabilities - Other			Total
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	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2013 and December 31, 2012, a net regulatory asset of $23 million and $45 million, respectively, was recorded related to the net derivative liability of $24 million and $45 million, respectively.

Schedule of Regulatory Assets (Liabilities), Net, Unrealized Loss (Gain), Net, on Derivative Contracts [Table Text Block]

The following table reconciles the beginning and ending balances of MidAmerican Energy'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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	24		$	60		$	45		$	73
Changes in fair value recognized in net regulatory assets	1			1			—			11
Net gains reclassified to operating revenue	—			7			3			20
Net gains reclassified to cost of fuel, energy and capacity	—			—			—			1
Net losses reclassified to cost of gas sold	(2		)	(5		)	(25		)	(42		)
Ending balance	$	23		$	63		$	23		$	63

Schedule Of Nonregulated Derivatives Not Designated As Hedging Instruments Gain (Loss) In Statement Of Financial Performance [Table Text Block]

The following table summarizes the pre-tax gains (losses) included on the 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 (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013		2012
Nonregulated operating revenue	$	3		$	(1	)	$	1	$	7
Nonregulated cost of sales	(3		)	2			—		(5		)
Total	$	—		$	1		$	1	$	2

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

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 commodity derivative contracts designated and qualifying as cash flow hedges recognized in other comprehensive income ("OCI"), as well as amounts reclassified to earnings (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	2		$	68		$	32		$	43
Changes in fair value recognized in OCI	25			2			—			40
Net losses reclassified to nonregulated cost of sales	(1		)	(14		)	(6		)	(27		)
Ending balance	$	26		$	56		$	26		$	56

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

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	June 30,	December 31,
	Measure	2013	2012
Electricity purchases	Megawatt hours	5	5
Natural gas purchases	Decatherms	23	36

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Components of Accumulated Other Comprehensive Loss, Net (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Comprehensive Income (Loss) Note [Text Block]

(3) Components of Accumulated Other Comprehensive Loss, Net

Refer to Note 3 of MidAmerican Energy's Notes to Financial Statements.

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Employee Benefit Plans (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Defined Benefit Plan Disclosure [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

(7) Employee Benefit Plans

Refer to Note 7 of MidAmerican Energy's Notes to Financial Statements.

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Other Related Party Transactions (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Related Party Transaction [Line Items]

Related Party Transactions Disclosure [Text Block]

(12) Other Related Party Transactions

Refer to Note 12 of MidAmerican Energy's Notes to Financial Statements.

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Risk Management and Hedging Activities (MEC) Not Designated as Hedging Contracts - Nonregulated (Details) (MidAmerican Energy Company [Member], Commodity Contract [Member], Not Designated as Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 0	$ 1	$ 1	$ 2
Nonregulated operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	3	(1)	1	7
Nonregulated cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ (3)	$ 2	$ 0	$ (5)

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Income Taxes (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Income tax credits	(57.00%)	(54.00%)	(60.00%)	(51.00%)
State income tax, net of federal income tax benefit	(4.00%)	(11.00%)	(2.00%)	(8.00%)
Income tax method change	0.00%	(32.00%)	0.00%	(14.00%)
Effects of ratemaking	(15.00%)	(3.00%)	(4.00%)	(3.00%)
Other, net	0.00%	0.00%	0.00%	1.00%
Effective income tax rate	(41.00%)	(65.00%)	(31.00%)	(40.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for renewable energy production tax credit			10 years
MEHC [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related Party Transaction, Cash (Paid) Received for Income Taxes, Net			$ (89)	$ 494
Repairs Deduction [Member]
Income tax method change [Abstract]
Income tax method change benefit			$ 16

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(Tables) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Value, by Balance Sheet Grouping [Table Text Block]

MidAmerican Funding's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of MidAmerican Funding's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Funding's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Funding's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,592	$	4,012	$	3,584	$	4,186

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Statements of Operations (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Operating revenue:
Regulated electric	$ 411	$ 404	$ 826	$ 784
Regulated gas	142	91	457	354
Nonregulated	204	214	394	445
Total operating revenue	757	709	1,677	1,583
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	114	101	237	209
Cost of gas sold	88	45	312	231
Other operating expenses	111	100	217	202
Maintenance	70	52	115	98
Depreciation and amortization	104	100	211	193
Property and other taxes	30	30	60	59
Total regulated operating costs and expenses	517	428	1,152	992
Nonregulated operating costs and expenses:
Cost of sales	190	193	364	405
Other	7	7	12	13
Total nonregulated operating costs and expenses	197	200	376	418
Total operating costs and expenses	714	628	1,528	1,410
Operating income	43	81	149	173
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	4	3	8	5
Other, net	3	0	7	4
Total non-operating income	8	4	16	10
Fixed charges:
Interest on long-term debt	35	36	70	73
Other interest expense	1	1	1	1
Allowance for borrowed funds	(2)	(1)	(3)	(2)
Total fixed charges	34	36	68	72
Income before income tax (benefit) expense	17	49	97	111
Income tax (benefit) expense	(7)	(32)	(30)	(44)
Net income	24	81	127	155
Preferred dividends	1	1	1	1
Earnings on common stock	$ 23	$ 80	$ 126	$ 154

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General (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Notes to Consolidated Financial Statements [Line Items]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

(1) General

MidAmerican Energy Company ("MidAmerican Energy") is a public utility with electric and natural gas operations and is the principal subsidiary of MHC Inc. ("MHC"). MHC is a holding company that conducts no business other than the ownership of its subsidiaries and related corporate services. MHC's nonregulated subsidiaries include Midwest Capital Group, Inc. and MEC Construction Services Co. MHC is the direct, wholly owned subsidiary of MidAmerican Funding, LLC ("MidAmerican Funding"), which is an Iowa limited liability company with MidAmerican Energy Holdings Company ("MEHC") as its sole member. MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").

The unaudited Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Financial Statements as of June 30, 2013, and for the three- and six-month periods ended June 30, 2013 and 2012. The results of operations for the three- and six-month periods ended June 30, 2013, are not necessarily indicative of the results to be expected for the full year.

The preparation of the unaudited Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the unaudited Financial Statements and the reported amounts of revenue and expenses during the period. Actual results may differ from the estimates used in preparing the unaudited Financial Statements. Note 2 of Notes to Financial Statements included in MidAmerican Energy's Annual Report on Form 10-K for the year ended December 31, 2012, describes the most significant accounting policies used in the preparation of the unaudited Financial Statements. There have been no significant changes in MidAmerican Energy's assumptions regarding significant accounting estimates and policies during the six-month period ended June 30, 2013.

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Statements of Comprehensive Income (MEC) (Parenthetical) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Unrealized (losses) gains on cash flow hedges, tax	$ (10)	$ 5	$ 2	$ (6)

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Risk Management and Hedging Activities (MEC) Collateral and Contingent Features (Details) (MidAmerican Energy Company [Member], Commodity Contract [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
MidAmerican Energy Company [Member] | Commodity Contract [Member]
Derivative [Line Items]
Derivatives, net liability positions with specific credit-risk features, aggregate fair value	$ 58	$ 84
Collateral already posted, aggregate fair value	0	0
Additional dollateral, aggregate fair value	$ 47	$ 72

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Balance Sheets (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
MidAmerican Energy Company [Member]
Utility plant, net:
Electric	$ 11,527	$ 11,416
Gas	1,316	1,301
Gross utility plant in service	12,843	12,717
Accumulated depreciation and amortization	(4,575)	(4,413)
Utility plant in service, net	8,268	8,304
Construction work in progress	431	318
Total utility plant, net	8,699	8,622
Current assets:
Cash and cash equivalents	186	354
Receivables, net	380	416
Income taxes receivable	20	0
Inventories	216	240
Other	72	56
Total current assets	874	1,066
Other assets:
Regulatory assets	844	876
Investments and nonregulated property, net	553	535
Other	122	133
Total other assets	1,519	1,544
Total assets	11,092	11,232
Capitalization:
MidAmerican Energy common shareholder's equity	3,613	3,608
Preferred securities	0	27
Long-term debt, excluding current portion	2,598	2,590
Total capitalization	6,211	6,225
Current liabilities:
Current portion of long-term debt	669	669
Accounts payable	300	386
Taxes accrued	113	224
Interest accrued	41	27
Other	120	120
Total current liabilities	1,243	1,426
Other liabilities:
Deferred income taxes	2,219	2,164
Asset retirement obligations	326	318
Regulatory liabilities	775	750
Other	318	349
Total other liabilities	3,638	3,581
Total capitalization and liabilities	$ 11,092	$ 11,232

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Employee Benefit Plans (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 5	$ 9	$ 9
Interest cost	8	9	16	18
Expected return on plan assets	(11)	(12)	(22)	(22)
Net amortization	2	1	5	2
Net periodic benefit cost	3	3	8	7
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	2	2
Interest cost	2	2	4	4
Expected return on plan assets	(4)	(3)	(7)	(6)
Net amortization	0	(2)	(1)	(2)
Net periodic benefit cost	$ (1)	$ (2)	$ (2)	$ (2)

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Noncontrolling Interests (LLC) Noncontrolling Interests (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Noncontrolling Interest [Line Items]

Noncontrolling Interest Disclosure [Text Block]

(4)    Noncontrolling Interests

Refer to Note 4 of MidAmerican Energy's Notes to Financial Statements. Preferred securities of subsidiary comprised the total of noncontrolling interests on the Consolidated Balance Sheet as of December 31, 2012.

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Commitments and Contingencies (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Notes to Consolidated Financial Statements [Line Items]

Commitments Contingencies and Guarantees [Text Block]

(10) Commitments and Contingencies

Legal Matters

MidAmerican Energy is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Energy does not believe that such normal and routine litigation will have a material impact on its financial results.

Commitments

In May 2013, MidAmerican Energy filed with the Iowa Utilities Board ("IUB") an application for ratemaking principles to construct up to 1,050 megawatts (nominal ratings) of additional wind-powered generating facilities expected to be placed in service in 2013, 2014 and 2015. In July 2013, MidAmerican Energy entered into contracts totaling $1.1 billion related to these wind-powered generating facilities, with minimum payments expected to be $199 million in 2013, $431 million in 2014 and $490 million in 2015.

In July 2013, MidAmerican Energy entered into a contract totaling $342 million to construct transmission assets related to its Multi-Value Projects approved by the Midcontinent Independent System Operator, Inc. with minimum payments of $17 million in 2013, $140 million in 2014, $149 million in 2015 and $36 million in 2016.

Environmental Laws and Regulations

MidAmerican Energy is subject to federal, state and local laws and regulations regarding air and water quality, emissions performance standards, climate change, coal combustion byproduct disposal, hazardous and solid waste disposal, protected species and other environmental matters that have the potential to impact its current and future operations. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations.

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Income Taxes (LLC) (Tables) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Income Taxes [Line Items]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(75	)	(60	)	(66	)	(57	)
State income tax, net of federal income tax benefit	(8	)	(13	)	(3	)	(9	)
Income tax method change	—		(36	)	—		(16	)
Effects of ratemaking	(20	)	(4	)	(4	)	(3	)
Other, net	(1	)	5		1		2
Effective income tax rate	(69	)%	(73	)%	(37	)%	(48	)%

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Risk Management and Hedging Activities (MEC) Not Designated as Hedging Contracts (Details) (MidAmerican Energy Company [Member], Not Designated as Hedging Instrument [Member], Commodity Contract [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contract [Member]
Regulatory Assets (Liabilities), Net, Derivatives [Roll Forward]
Beginning balance	$ 24	$ 60	$ 45	$ 73
Changes in fair value recognized in net regulatory assets	1	1	0	11
Net gains reclassified to operating revenue	0	7	3	20
Net gains reclassified to cost of fuel, energy and capacity	0	0	0	1
Net losses reclassified to cost of gas sold	(2)	(5)	(25)	(42)
Ending balance	$ 23	$ 63	$ 23	$ 63

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Income Taxes (LLC) (Details) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Income tax credits	(75.00%)	(60.00%)	(66.00%)	(57.00%)
State income tax, net of federal income tax benefit	(8.00%)	(13.00%)	(3.00%)	(9.00%)
Income tax method change	0.00%	(36.00%)	0.00%	(16.00%)
Effects of ratemaking	(20.00%)	(4.00%)	(4.00%)	(3.00%)
Other, net	(1.00%)	5.00%	1.00%	2.00%
Effective income tax rate	(69.00%)	(73.00%)	(37.00%)	(48.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for renewable energy production tax credit			10 years
MEHC [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related Party Transaction, Cash (Paid) Received for Income Taxes, Net			$ (86)	$ 498
Repairs Deduction [Member]
Income tax method change [Abstract]
Income tax method change benefit			$ 16

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Income Taxes (MEC) (Tables) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Income Taxes [Line Items]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(57	)	(54	)	(60	)	(51	)
State income tax, net of federal income tax benefit	(4	)	(11	)	(2	)	(8	)
Income tax method change	—		(32	)	—		(14	)
Effects of ratemaking	(15	)	(3	)	(4	)	(3	)
Other, net	—		—		—		1
Effective income tax rate	(41	)%	(65	)%	(31	)%	(40	)%

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Commitments and Contingencies (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Commitments Contingencies and Guarantees [Text Block]

(10) Commitments and Contingencies

MidAmerican Funding is party to a variety of legal actions arising out of the normal course of business. Plaintiffs occasionally seek punitive or exemplary damages. MidAmerican Funding does not believe that such normal and routine litigation will have a material impact on its consolidated financial results.

Refer to Note 10 of MidAmerican Energy's Notes to Financial Statements.

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Segment Information (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

(11) Segment Information

MidAmerican Funding has identified three reportable segments: regulated electric, regulated gas and nonregulated energy. The regulated electric segment derives most of its revenue from regulated retail sales of electricity to residential, commercial, and industrial customers and from wholesale sales. The regulated gas segment derives most of its revenue from regulated retail sales of natural gas to residential, commercial, and industrial customers and also obtains revenue by transporting gas owned by others through its distribution system. Pricing for regulated electric and regulated gas sales are established separately by regulatory agencies; therefore, management also reviews each segment separately to make decisions regarding allocation of resources and in evaluating performance. The nonregulated energy segment derives most of its revenue from nonregulated retail electric and gas activities. Common operating costs, interest income, interest expense and income tax expense are allocated to each segment based on certain factors, which primarily relate to the nature of the cost. "Other" in the tables below consists of the nonregulated subsidiaries of MidAmerican Funding not engaged in the energy business and parent company interest expense. The following tables provide information on a reportable segment basis (in millions):

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Operating revenue:
Regulated electric	$	411	$	404	$	826	$	784
Regulated gas	142		91		457		354
Nonregulated energy	204		214		394		445
Other	2		—		3		—
Total operating revenue	$	759	$	709	$	1,680	$	1,583
Depreciation and amortization:
Regulated electric	$	95	$	91	$	193	$	175
Regulated gas	9		9		18		18
Total depreciation and amortization	$	104	$	100	$	211	$	193
Operating income:
Regulated electric	$	31	$	66	$	81	$	114
Regulated gas	4		1		49		31
Nonregulated energy	8		14		19		28
Other	—		—		—		(1		)
Total operating income	$	43	$	81	$	149	$	172

	As of
	June 30, 2013		December 31, 2012
Total assets(1):
Regulated electric	$	11,103	$	11,089
Regulated gas	1,131		1,280
Nonregulated energy	127		132
Other	26		29
Total assets	$	12,387	$	12,530

(1) Total assets by reportable segment reflect the assignment of goodwill to applicable reporting units.

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Consolidated Statements of Cash Flows (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
Cash flows from operating activities:
Net income	$ 122	$ 149
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	211	193
Deferred income taxes and amortization of investment tax credits	16	21
Changes in other assets and liabilities	28	22
Other, net	0	(8)
Changes in other operating assets and liabilities:
Receivables, net	32	52
Inventories	24	0
Derivative collateral, net	5	0
Contributions to pension and other postretirement benefit plans, net	4	(55)
Accounts payable	(35)	0
Taxes accrued	(133)	433
Other current assets and liabilities	22	3
Net cash flows from operating activities	296	810
Cash flows from investing activities:
Utility construction expenditures	(327)	(259)
Purchases of available-for-sale securities	(44)	(29)
Proceeds from sales of available-for-sale securities	37	20
Other, net	18	7
Net cash flows from investing activities	(316)	(261)
Cash flows from financing activities:
Repayment of long-term debt	0	(283)
Redemption of preferred securities of subsidiary	(28)	0
Net change in note payable to affiliate	(119)	6
Other, net	0	(1)
Net cash flows from financing activities	(147)	(278)
Net change in cash and cash equivalents	(167)	271
Cash and cash equivalents at beginning of period	354	1
Cash and cash equivalents at end of period	$ 187	$ 272

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Commitments and Contingencies (MEC) Construction commitments (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Jul. 31, 2013 Subsequent Event [Member] Wind Generating Facility [Member]	Jul. 31, 2013 Subsequent Event [Member] Electric Transmission [Member]	Jun. 30, 2013 Wind-powered generating facilities [Member] MWs
ContractualObligationFiscalYearMaturityScheduleTable [Line Items]
Megawatt nominal ratings			1,050
Purchase Obligation	$ 1,100	$ 342
Purchase Obligation, Due in Next Twelve Months	199	17
Purchase Obligation, Due in Second Year	431	140
Purchase Obligation, Due in Third Year	490	149
Purchase Obligation, Due in Fourth Year		$ 36

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Recent Financing Transactions (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Debt Instrument [Line Items]

Debt Disclosure [Text Block]

(5) Recent Financing Transactions

Refer to Note 5 of MidAmerican Energy's Notes to Financial Statements.

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Fair Value Measurements (MEC) (Tables) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions):

	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other(1)			Total
As of June 30, 2013:
Assets:
Commodity derivatives	$	1		$	20		$	7		$	(24	)	$	4
Money market mutual funds(2)	172			—			—			—			172
Debt securities:
United States government obligations	118			—			—			—			118
International government obligations	—			1			—			—			1
Corporate obligations	—			31			—			—			31
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			22			—			22
Equity securities:
United States companies	202			—			—			—			202
International companies	3			—			—			—			3
	$	496		$	56		$	29		$	(24	)	$	557
Liabilities - commodity derivatives	$	(5	)	$	(64	)	$	(9	)	$	26		$	(52	)

As of December 31, 2012:
Assets:
Commodity derivatives	$	1		$	22		$	7		$	(23	)	$	7
Money market mutual funds(2)	163			—			—			—			163
Debt securities:
United States government obligations	104			—			—			—			104
International government obligations	—			1			—			—			1
Corporate obligations	—			32			—			—			32
Municipal obligations	—			4			—			—			4
Agency, asset and mortgage-backed obligations	—			6			—			—			6
Auction rate securities	—			—			21			—			21
Equity securities:
United States companies	187			—			—			—			187
International companies	2			—			—			—			2
Investment funds	1			—			—			—			1
	$	458		$	65		$	28		$	(23	)	$	528
Liabilities - commodity derivatives	$	(10	)	$	(90	)	$	(7	)	$	30		$	(77	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $2 million and $7 million as of June 30, 2013 and December 31, 2012, respectively.

(2) Amounts are included in cash and cash equivalents and investments and nonregulated property, net on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Fair Value Assets and Liabilities Net Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]

The following table reconciles the beginning and ending balances of MidAmerican Energy's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	Commodity Derivatives			Auction Rate Securities		Commodity Derivatives			Auction Rate Securities
2013:
Beginning balance	$	(2	)	$	22	$	—		$	21
Changes included in earnings(1)	2			—		5			—
Changes in fair value recognized in other comprehensive income	(2		)	—		(5		)	1
Changes in fair value recognized in net regulatory assets	1			—		2			—
Settlements	(1		)	—		(4		)	—
Ending balance	$	(2	)	$	22	$	(2	)	$	22
2012:
Beginning balance	$	23		$	17	$	22		$	16
Changes included in earnings(1)	(1		)	—		9			—
Changes in fair value recognized in other comprehensive income	(1		)	—		(4		)	1
Changes in fair value recognized in net regulatory assets	(6		)	—		2			—
Settlements	(7		)	—		(21		)	—
Ending balance	$	8		$	17	$	8		$	17

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2013 and 2012, net unrealized gains (losses) included in earnings for the three-month periods ended June 30, 2013 and 2012, totaled $2 million and $(2) million, respectively, and for the six-month periods ended June 30, 2013 and 2012, totaled $(1) million and $5 million, respectively.

Fair Value, by Balance Sheet Grouping [Table Text Block]

MidAmerican Energy's long-term debt is carried at cost on the Financial Statements. The fair value of MidAmerican Energy's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Energy's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Energy's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,267	$	3,601	$	3,259	$	3,737

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Components of Accumulated Other Comprehensive Loss, Net (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Comprehensive Income (Loss) Note [Text Block]

(3) Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in AOCI by each component of other comprehensive income, net of applicable income taxes, for the six-month period ended June 30, 2013 (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			Losses on			Other
	Available-For-Sale			Cash Flow			Comprehensive
	Securities			Hedges			Loss, Net
Balance, December 31, 2012	$	(5	)	$	(19	)	$	(24	)
Other comprehensive income	—			4			4
Balance, June 30, 2013	$	(5	)	$	(15	)	$	(20	)

Reclassifications from AOCI to net income for the six-month periods ended June 30, 2013 and 2012, were net losses reflected in nonregulated cost of sales totaling $6 million and $27 million, respectively.

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Consolidated Statements of Changes in Equity (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	MidAmerican Funding, LLC and Subsidiaries [Domain] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Paid-in Capital [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Retained Earnings [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Accumulated Other Comprehensive Loss, Net [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Noncontrolling Interests [Member] USD ($)
Balance at Dec. 31, 2011	$ 4,000	$ 1,679	$ 2,327	$ (34)	$ 28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	149		148		1
Other comprehensive income (loss)	(7)			(7)	0
Distributions to noncontrolling interests	(1)				(1)
Balance at Jun. 30, 2012	4,141	1,679	2,475	(41)	28
Balance at Mar. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	78
Balance at Jun. 30, 2012	4,141	1,679
Balance at Dec. 31, 2012	4,351	1,679	2,669	(24)	27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	122		121		1
Other comprehensive income (loss)	4			4	0
Redemption of preferred securities of subsidiary	(28)				(28)
Balance at Jun. 30, 2013	4,449	1,679	2,790	(20)	0
Balance at Mar. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	22
Balance at Jun. 30, 2013	$ 4,449	$ 1,679

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Statements of Cash Flows (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
MidAmerican Energy Company [Member]
Cash flows from operating activities:
Net income	$ 127	$ 155
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	211	193
Deferred income taxes and amortization of investment tax credits	16	22
Changes in other assets and liabilities	28	22
Other, net	1	(8)
Changes in other operating assets and liabilities:
Receivables, net	32	51
Inventories	24	0
Derivative collateral, net	5	0
Contributions to pension and other postretirement benefit plans, net	4	(55)
Accounts payable	(35)	0
Taxes accrued	(133)	432
Other current assets and liabilities	22	3
Net cash flows from operating activities	302	815
Cash flows from investing activities:
Utility construction expenditures	(327)	(259)
Purchases of available-for-sale securities	(44)	(29)
Proceeds from sales of available-for-sale securities	37	20
Other, net	17	7
Net cash flows from investing activities	(317)	(261)
Cash flows from financing activities:
Dividends	(125)	(1)
Repayment of long-term debt	0	(283)
Redemption of preferred securities	(28)	0
Net cash flows from financing activities	(153)	(284)
Net change in cash and cash equivalents	(168)	270
Cash and cash equivalents at beginning of period	354	1
Cash and cash equivalents at end of period	$ 186	$ 271

XML

Employee Benefit Plans (MEC) Narrative (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions In current fiscal year	$ 8
Contributions by employer in current year	4
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions In current fiscal year	0
Contributions by employer in current year	$ 0

XML

Components of Accumulated Other Comprehensive Loss, Net (MEC) (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income, unrealized gains on cash flow hedges	$ (14)	$ 7	$ 4	$ (7)
Other comprehensive income (loss)			4	(7)
Commodity Contract [Member] | Designated as Hedging Instrument [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Net losses reclassified to nonregulated cost of sales	1	14	6	27
Accumulated Other Comprehensive Loss, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, December 31, 2012, Unrealized Losses on Available-For-Fale Securities			(5)
Balance, December 31, 2012, Unrealized Losses on Cash Flow Hedges			(19)
Balance, December 31, 2012, Accumulated Other Comprehensive Loss, Net			(24)
Other comprehensive income, unrealized gains on available-for-sales securities			0
Other comprehensive income, unrealized gains on cash flow hedges			4
Other comprehensive income (loss)			4	(7)
Balance, June 30, 2013, Unrealized Losses on Available-For-Sale Securities	(5)		(5)
Balance, June 30, 2013, Unrealized Losses on Cash Flow Hedges	(15)		(15)
Balance, June 30, 2013, Accumulated Other Comprehensive Loss, Net	$ (20)		$ (20)

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Risk Management and Hedging Activities (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])

6 Months Ended

Jun. 30, 2013

MidAmerican Funding, LLC and Subsidiaries [Domain]

Derivatives, Fair Value [Line Items]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(8) Risk Management and Hedging Activities

Refer to Note 8 of MidAmerican Energy's Notes to Financial Statements.

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Fair Value Measurements (LLC) Debt (Details) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 3,592	$ 3,584
Long-term debt, fair value		4,186
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 4,012

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Fair Value Measurements (MEC) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure			$ 1
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure			1
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure			0
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure			0
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure			0
MidAmerican Energy Company [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	2		7
MidAmerican Energy Company [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Commodity derivative assets	4		7
Assets, Fair Value Disclosure	557		528
Liabilities - commodity derivatives, fair value	(52)		(77)
MidAmerican Energy Company [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Commodity derivative assets	1		1
Assets, Fair Value Disclosure	496		458
Liabilities - commodity derivatives, fair value	(5)		(10)
MidAmerican Energy Company [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Commodity derivative assets	20		22
Assets, Fair Value Disclosure	56		65
Liabilities - commodity derivatives, fair value	(64)		(90)
MidAmerican Energy Company [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Commodity derivative assets	7		7
Assets, Fair Value Disclosure	29		28
Liabilities - commodity derivatives, fair value	(9)		(7)
MidAmerican Energy Company [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Commodity derivative assets	(24)	[1]	(23)	[1]
Assets, Fair Value Disclosure	(24)	[1]	(23)	[1]
Liabilities - commodity derivatives, fair value	26	[1]	30	[1]
MidAmerican Energy Company [Member] | Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	172	[2]	163	[2]
MidAmerican Energy Company [Member] | Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	172	[2]	163	[2]
MidAmerican Energy Company [Member] | Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[2]	0	[2]
MidAmerican Energy Company [Member] | Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[2]	0	[2]
MidAmerican Energy Company [Member] | Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1],[2]	0	[1],[2]
MidAmerican Energy Company [Member] | United States government obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	118		104
MidAmerican Energy Company [Member] | United States government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	118		104
MidAmerican Energy Company [Member] | United States government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | United States government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | United States government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | International government obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1		1
MidAmerican Energy Company [Member] | International government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | International government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	1		1
MidAmerican Energy Company [Member] | International government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | International government obligations [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	31		32
MidAmerican Energy Company [Member] | Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	31		32
MidAmerican Energy Company [Member] | Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2		4
MidAmerican Energy Company [Member] | Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2		4
MidAmerican Energy Company [Member] | Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2		6
MidAmerican Energy Company [Member] | Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	2		6
MidAmerican Energy Company [Member] | Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	22		21
MidAmerican Energy Company [Member] | Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	22		21
MidAmerican Energy Company [Member] | Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | United States equity securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	202		187
MidAmerican Energy Company [Member] | United States equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	202		187
MidAmerican Energy Company [Member] | United States equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | United States equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | United States equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0	[1]	0	[1]
MidAmerican Energy Company [Member] | International equity securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	3		2
MidAmerican Energy Company [Member] | International equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	3		2
MidAmerican Energy Company [Member] | International equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | International equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	0		0
MidAmerican Energy Company [Member] | International equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Collateral and netting [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	$ 0	[1]	$ 0	[1]

[1] Represents netting under master netting arrangements and a net cash collateral receivable of $2 million and $7 million as of June 30, 2013 and December 31, 2012, respectively.

[2] Amounts are included in cash and cash equivalents and investments and nonregulated property, net on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

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Income Taxes (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Income Taxes [Line Items]

Income Tax Disclosure [Text Block]

(6) Income Taxes

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax benefit is as follows:

	Three-Month Periods				Six-Month Periods
	Ended June 30,				Ended June 30,
	2013		2012		2013		2012
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(57	)	(54	)	(60	)	(51	)
State income tax, net of federal income tax benefit	(4	)	(11	)	(2	)	(8	)
Income tax method change	—		(32	)	—		(14	)
Effects of ratemaking	(15	)	(3	)	(4	)	(3	)
Other, net	—		—		—		1
Effective income tax rate	(41	)%	(65	)%	(31	)%	(40	)%

Income tax credits relate primarily to production tax credits earned by MidAmerican Energy's wind-powered generating facilities. Federal renewable electricity production tax credits are earned as energy from qualifying wind-powered generating facilities is produced and sold and are based on a per-kilowatt hour rate pursuant to the applicable federal income tax law. Wind-powered generating facilities are eligible for the credits for 10 years from the date the qualifying generating facilities were placed in service.

MidAmerican Energy's earnings for the three- and six-month periods ended June 30, 2012, reflect $16 million of federal income tax benefits recognized in connection with an income tax method change for income tax years prior to 2012. MidAmerican Energy changed the method by which it determines current income tax deductions for repair costs related to its regulated utility electric transmission and distribution assets based on guidance published by the Internal Revenue Service. Application of this guidance results in current deductibility for those costs, which are capitalized for book purposes. MidAmerican Energy retroactively applied the method change, deducted amounts related to prior years' costs on its 2011 tax return and recognized the change in the second quarter of 2012. State utility rate regulation in Iowa requires the tax effect of certain temporary differences be flowed through immediately to customers. Therefore, certain deferred amounts that would otherwise have been recognized in income tax expense have been included as changes in regulatory assets.

Berkshire Hathaway includes MEHC and subsidiaries in its United States federal income tax return. Consistent with established regulatory practice, MidAmerican Energy's provision for income taxes has been computed on a stand-alone basis, and substantially all of its currently payable or receivable income taxes are remitted to or received from MEHC. MidAmerican Energy made net cash payments for income taxes to MEHC totaling $89 million for the six-month period ended June 30, 2013, and received net cash receipts for income taxes from MEHC totaling $494 million for the six-month period ended June 30, 2012.

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New Accounting Pronouncements (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Notes to Consolidated Financial Statements [Line Items]

Accounting Changes and Error Corrections [Text Block]

(2) New Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2013-04, which amends FASB Accounting Standards Codification ("ASC") Topic 405, "Liabilities." The amendments in this guidance require an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the amount the reporting entity agreed to pay plus any additional amounts the reporting entity expects to pay on behalf of its co-obligor. Additionally, the guidance requires the entity to disclose the nature and amount of the obligation, as well as other information about those obligations. This guidance is effective for interim and annual reporting periods beginning after December 15, 2013. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements.

In February 2013, the FASB issued ASU No. 2013-02, which amends FASB ASC Topic 220, "Comprehensive Income." The amendments in this guidance require an entity to provide information about the amounts reclassified out of accumulated other comprehensive income (loss) ("AOCI") by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income if the amount reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required by GAAP that provide additional detail about those amounts. MidAmerican Energy adopted this guidance on January 1, 2013. The adoption of this guidance did not have a material impact on MidAmerican Energy's disclosures included within Notes to Financial Statements.

In December 2011, the FASB issued ASU No. 2011-11, which amends FASB ASC Topic 210, "Balance Sheet." The amendments in this guidance require an entity to provide quantitative disclosures about offsetting financial instruments and derivative instruments. Additionally, this guidance requires qualitative and quantitative disclosures about master netting agreements or similar agreements when the financial instruments and derivative instruments are not offset. In January 2013, the FASB issued ASU No. 2013-01, which also amends FASB ASC Topic 210 to clarify that the scope of ASU No. 2011-11 only applies to derivative instruments, repurchase agreements, reverse purchase agreements and securities borrowing and securities lending transactions that are either being offset or are subject to an enforceable master netting arrangement or similar agreement. MidAmerican Energy adopted the guidance on January 1, 2013. The adoption of the guidance did not have a material impact on MidAmerican Energy's disclosures included within Notes to Financial Statements.

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Fair Value Measurements (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value Disclosures [Text Block]

(9) Fair Value Measurements

The carrying value of MidAmerican Energy's cash, certain cash equivalents, receivables, payables, accrued liabilities and short-term borrowings approximates fair value because of the short-term maturity of these instruments. MidAmerican Energy has various financial assets and liabilities that are measured at fair value on the Financial Statements using inputs from the three levels of the fair value hierarchy. A financial asset or liability classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows:

• Level 1 — Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that MidAmerican Energy has the ability to access at the measurement date.

• Level 2 — Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability and inputs that are derived principally from or corroborated by observable market data by correlation or other means (market corroborated inputs).

• Level 3 — Unobservable inputs reflect MidAmerican Energy's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. MidAmerican Energy develops these inputs based on the best information available, including its own data.

The following table presents MidAmerican Energy's assets and liabilities recognized on the Balance Sheets and measured at fair value on a recurring basis (in millions):

	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other(1)			Total
As of June 30, 2013:
Assets:
Commodity derivatives	$	1		$	20		$	7		$	(24	)	$	4
Money market mutual funds(2)	172			—			—			—			172
Debt securities:
United States government obligations	118			—			—			—			118
International government obligations	—			1			—			—			1
Corporate obligations	—			31			—			—			31
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			22			—			22
Equity securities:
United States companies	202			—			—			—			202
International companies	3			—			—			—			3
	$	496		$	56		$	29		$	(24	)	$	557
Liabilities - commodity derivatives	$	(5	)	$	(64	)	$	(9	)	$	26		$	(52	)

As of December 31, 2012:
Assets:
Commodity derivatives	$	1		$	22		$	7		$	(23	)	$	7
Money market mutual funds(2)	163			—			—			—			163
Debt securities:
United States government obligations	104			—			—			—			104
International government obligations	—			1			—			—			1
Corporate obligations	—			32			—			—			32
Municipal obligations	—			4			—			—			4
Agency, asset and mortgage-backed obligations	—			6			—			—			6
Auction rate securities	—			—			21			—			21
Equity securities:
United States companies	187			—			—			—			187
International companies	2			—			—			—			2
Investment funds	1			—			—			—			1
	$	458		$	65		$	28		$	(23	)	$	528
Liabilities - commodity derivatives	$	(10	)	$	(90	)	$	(7	)	$	30		$	(77	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $2 million and $7 million as of June 30, 2013 and December 31, 2012, respectively.

(2) Amounts are included in cash and cash equivalents and investments and nonregulated property, net on the Balance Sheets. The fair value of these money market mutual funds approximates cost.

Derivative contracts are recorded on the Balance Sheets as either assets or liabilities and are stated at estimated fair value unless they are designated as normal purchases or normal sales and qualify for the exception afforded by GAAP. When available, the fair value of derivative contracts is estimated using unadjusted quoted prices for identical contracts in the market in which MidAmerican Energy transacts. When quoted prices for identical contracts are not available, MidAmerican Energy uses forward price curves. Forward price curves represent MidAmerican Energy's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. MidAmerican Energy bases its forward price curves upon market price quotations, when available, or internally developed and commercial models, with internal and external fundamental data inputs. Market price quotations are obtained from independent energy brokers, exchanges, direct communication with market participants and actual transactions executed by MidAmerican Energy. Market price quotations are generally readily obtainable for the applicable term of MidAmerican Energy's outstanding derivative contracts; therefore, MidAmerican Energy's forward price curves reflect observable market quotes. Market price quotations for certain electricity and natural gas trading hubs are not as readily obtainable due to the length of the contract. Given that limited market data exists for these contracts, as well as for those contracts that are not actively traded, MidAmerican Energy uses forward price curves derived from internal models based on perceived pricing relationships to major trading hubs that are based on unobservable inputs. The estimated fair value of these derivative contracts is a function of underlying forward commodity prices, interest rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 8 for further discussion regarding MidAmerican Energy's risk management and hedging activities.

MidAmerican Energy's investments in money market mutual funds and debt and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. The fair value of MidAmerican Energy's investments in auction rate securities, where there is no current liquid market, is determined using pricing models based on available observable market data and MidAmerican Energy's judgment about the assumptions, including liquidity and nonperformance risks, which market participants would use when pricing the asset.

The following table reconciles the beginning and ending balances of MidAmerican Energy's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	Commodity Derivatives			Auction Rate Securities		Commodity Derivatives			Auction Rate Securities
2013:
Beginning balance	$	(2	)	$	22	$	—		$	21
Changes included in earnings(1)	2			—		5			—
Changes in fair value recognized in other comprehensive income	(2		)	—		(5		)	1
Changes in fair value recognized in net regulatory assets	1			—		2			—
Settlements	(1		)	—		(4		)	—
Ending balance	$	(2	)	$	22	$	(2	)	$	22
2012:
Beginning balance	$	23		$	17	$	22		$	16
Changes included in earnings(1)	(1		)	—		9			—
Changes in fair value recognized in other comprehensive income	(1		)	—		(4		)	1
Changes in fair value recognized in net regulatory assets	(6		)	—		2			—
Settlements	(7		)	—		(21		)	—
Ending balance	$	8		$	17	$	8		$	17

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2013 and 2012, net unrealized gains (losses) included in earnings for the three-month periods ended June 30, 2013 and 2012, totaled $2 million and $(2) million, respectively, and for the six-month periods ended June 30, 2013 and 2012, totaled $(1) million and $5 million, respectively.

MidAmerican Energy's long-term debt is carried at cost on the Financial Statements. The fair value of MidAmerican Energy's long-term debt is a Level 2 fair value measurement and has been estimated based upon quoted market prices, where available, or at the present value of future cash flows discounted at rates consistent with comparable maturities with similar credit risks. The carrying value of MidAmerican Energy's variable-rate long-term debt approximates fair value because of the frequent repricing of these instruments at market rates. The following table presents the carrying value and estimated fair value of MidAmerican Energy's long-term debt (in millions):

	As of June 30, 2013				As of December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	3,267	$	3,601	$	3,259	$	3,737

XML

Employee Benefit Plans (MEC) (MidAmerican Energy Company [Member])

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

(7) Employee Benefit Plans

MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of MEHC and its domestic energy subsidiaries other than PacifiCorp. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of MEHC and its domestic energy subsidiaries other than PacifiCorp. Net periodic benefit cost 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,
	2013			2012			2013			2012
Pension:
Service cost	$	4		$	5		$	9		$	9
Interest cost	8			9			16			18
Expected return on plan assets	(11		)	(12		)	(22		)	(22		)
Net amortization	2			1			5			2
Net periodic benefit cost	$	3		$	3		$	8		$	7
Other postretirement:
Service cost	$	1		$	1		$	2		$	2
Interest cost	2			2			4			4
Expected return on plan assets	(4		)	(3		)	(7		)	(6		)
Net amortization	—			(2		)	(1		)	(2		)
Net periodic benefit cost (benefit)	$	(1	)	$	(2	)	$	(2	)	$	(2	)

Employer contributions to the pension and other postretirement benefit plans are expected to be $8 million and $- million, respectively, during 2013. As of June 30, 2013, $4 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

XML

Document and Entity Information Document	6 Months Ended
	Jun. 30, 2013	Jul. 31, 2013
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Entity Filer Category	Non-accelerated Filer
Entity Registrant Name	MIDAMERICAN ENERGY COMPANY
Entity Central Index Key	0000928576
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		70,980,203
MidAmerican Funding, LLC and Subsidiaries [Domain]
Entity Information [Line Items]
Entity Filer Category	Non-accelerated Filer
Entity Registrant Name	MIDAMERICAN FUNDING, LLC
Entity Central Index Key	0001098296
Current Fiscal Year End Date	--12-31

XML

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

6 Months Ended

Jun. 30, 2013

MidAmerican Energy Company [Member]

Derivatives, Fair Value [Line Items]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(8) 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 Note 9 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 Balance Sheets (in millions):

	Current Assets - Other			Other Assets - Other			Current Liabilities - Other			Other Liabilities - Other			Total
As of June 30, 2013:
Not designated as hedging contracts(1):
Commodity assets	$	18		$	3		$	5		$	—		$	26
Commodity liabilities	(15		)	(1		)	(31		)	(3		)	(50		)
Total	3			2			(26		)	(3		)	(24		)
Designated as hedging contracts:
Commodity assets	—			(1		)	2			1			2
Commodity liabilities	—			—			(18		)	(10		)	(28		)
Total	—			(1		)	(16		)	(9		)	(26		)
Total derivatives	3			1			(42		)	(12		)	(50		)
Cash collateral receivable	—			—			2			—			2
Total derivatives - net basis	$	3		$	1		$	(40	)	$	(12	)	$	(48	)

	Current Assets - Other			Other Assets - Other		Current Liabilities - Other			Other Liabilities - Other			Total
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	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2013 and December 31, 2012, a net regulatory asset of $23 million and $45 million, respectively, was recorded related to the net derivative liability of $24 million and $45 million, respectively.

Not Designated as Hedging Contracts

The following table reconciles the beginning and ending balances of MidAmerican Energy'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						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	24		$	60		$	45		$	73
Changes in fair value recognized in net regulatory assets	1			1			—			11
Net gains reclassified to operating revenue	—			7			3			20
Net gains reclassified to cost of fuel, energy and capacity	—			—			—			1
Net losses reclassified to cost of gas sold	(2		)	(5		)	(25		)	(42		)
Ending balance	$	23		$	63		$	23		$	63

The following table summarizes the pre-tax gains (losses) included on the 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 (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013		2012
Nonregulated operating revenue	$	3		$	(1	)	$	1	$	7
Nonregulated cost of sales	(3		)	2			—		(5		)
Total	$	—		$	1		$	1	$	2

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 commodity derivative contracts designated and qualifying as cash flow hedges recognized in other comprehensive income ("OCI"), as well as amounts reclassified to earnings (in millions):

	Three-Month Periods						Six-Month Periods
	Ended June 30,						Ended June 30,
	2013			2012			2013			2012
Beginning balance	$	2		$	68		$	32		$	43
Changes in fair value recognized in OCI	25			2			—			40
Net losses reclassified to nonregulated cost of sales	(1		)	(14		)	(6		)	(27		)
Ending balance	$	26		$	56		$	26		$	56

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 three- and six-month periods ended June 30, 2013 and 2012, hedge ineffectiveness was insignificant. As of June 30, 2013, MidAmerican Energy had cash flow hedges with expiration dates extending through December 2017, and $16 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 commodity derivative contracts with fixed price terms that comprise the mark-to-market values as of (in millions):

	Unit of	June 30,	December 31,
	Measure	2013	2012
Electricity purchases	Megawatt hours	5	5
Natural gas purchases	Decatherms	23	36

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 Midcontinent Independent 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 June 30, 2013, MidAmerican Energy's credit ratings from the three 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 $58 million and $84 million as of June 30, 2013 and December 31, 2012, 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 June 30, 2013 and December 31, 2012, MidAmerican Energy would have been required to post $47 million and $72 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.

XML

Fair Value Measurements (MEC) Debt (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 3,267	$ 3,259
Long-term debt, fair value		3,737
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 3,601

XML

Fair Value Measurements (MEC) Level 3 (Details) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Commodity Derivative [Member]
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (2)		$ 23		$ 0		$ 22
Changes included in earnings	2	[1]	(1)	[1]	5	[1]	9	[1]
Changes in fair value recognized in other comprehensive income	(2)		(1)		(5)		(4)
Changes in fair value recognized in net regulatory assets	1		(6)		2		2
Settlements	(1)		(7)		(4)		(21)
Ending balance	(2)		8		(2)		8
Net unrealized gains (losses) included in earnings	2		(2)
Auction rate securities [Member]
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	22		17		21		16
Changes included in earnings	0	[1]	0	[1]	0	[1]	0	[1]
Changes in fair value recognized in other comprehensive income	0		0		1		1
Changes in fair value recognized in net regulatory assets	0		0		0		0
Settlements	0		0		0		0
Ending balance	$ 22		$ 17		$ 22		$ 17

[1] Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2013 and 2012, net unrealized gains (losses) included in earnings for the three-month periods ended June 30, 2013 and 2012, totaled $2 million and $(2) million, respectively, and for the six-month periods ended June 30, 2013 and 2012, totaled $(1) million and $5 million, respectively.