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, 2015

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
333-190862	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, Berkshire Hathaway Energy Company, as of July 31, 2015.

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, 2015, 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	29
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	40
Item 4.	Controls and Procedures	40
PART II
Item 1.	Legal Proceedings	41
Item 1A.	Risk Factors	41
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	41
Item 3.	Defaults Upon Senior Securities	41
Item 4.	Mine Safety Disclosures	41
Item 5.	Other Information	41
Item 6.	Exhibits	41
Signatures		42
Exhibit Index		43

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
BHE	Berkshire Hathaway Energy 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
GWh	Gigawatt Hours
IUB	Iowa Utilities Board
MW	Megawatts
MWh	Megawatt Hours

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, as amended, 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, and compliance with, laws and regulations, including reliability and safety standards, 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, new technologies and various conservation, energy efficiency and distributed generation measures and programs, 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;

• 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;

ii

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

• 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;

• the effects of catastrophic and other unforeseen events, which may be caused by factors beyond MidAmerican Energy's control or by a breakdown or failure of its operating assets, including storms, floods, fires, explosions, litigation, wars, terrorism and embargoes; 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	19
Consolidated Balance Sheets	20
Consolidated Statements of Operations	21
Consolidated Statements of Comprehensive Income	22
Consolidated Statements of Changes in Equity	23
Consolidated Statements of Cash Flows	24
Notes to Consolidated Financial Statements	25

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, 2015, and the related statements of operations and comprehensive income for the three-month and six-month periods ended June 30, 2015 and 2014, and of changes in equity and cash flows for the six-month periods ended June 30, 2015 and 2014. 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 balance sheet and statement of capitalization (not presented herein) of MidAmerican Energy Company as of December 31, 2014, and the related statements of operations, comprehensive income, changes in equity and cash flows for the year then ended (not presented herein); and in our report dated February 27, 2015, we expressed an unqualified opinion on those financial statements. In our opinion, the information set forth in the accompanying balance sheet as of December 31, 2014 is fairly stated, in all material respects, in relation to the balance sheet from which it has been derived.

/s/ Deloitte & Touche LLP

Des Moines, Iowa

August 7, 2015

2

MIDAMERICAN ENERGY COMPANY

BALANCE SHEETS (Unaudited)

(Amounts in millions)

	As of
	June 30, 2015			December 31, 2014
ASSETS
Utility plant, net:
Electric	$	13,534		$	13,426
Gas	1,462			1,432
Gross utility plant in service	14,996			14,858
Accumulated depreciation and amortization	(5,042		)	(4,954		)
Utility plant in service, net	9,954			9,904
Construction work in progress	893			606
Total utility plant, net	10,847			10,510
Current assets:
Cash and cash equivalents	302			29
Receivables, net	392			433
Income taxes receivable	—			307
Inventories	181			185
Other	84			87
Total current assets	959			1,041
Other assets:
Regulatory assets	959			908
Investments and nonregulated property, net	640			634
Other	154			164
Total other assets	1,753			1,706
Total assets	$	13,559		$	13,257
CAPITALIZATION AND LIABILITIES
Capitalization:
MidAmerican Energy common shareholder's equity	$	4,472		$	4,250
Long-term debt, excluding current portion	3,634			3,630
Total capitalization	8,106			7,880
Current liabilities:
Short-term debt	—			50
Current portion of long-term debt	431			426
Accounts payable	373			392
Taxes accrued	133			128
Interest accrued	40			40
Other	162			131
Total current liabilities	1,139			1,167
Other liabilities:
Deferred income taxes	2,738			2,663
Asset retirement obligations	457			432
Regulatory liabilities	836			837
Other	283			278
Total other liabilities	4,314			4,210
Total capitalization and liabilities	$	13,559		$	13,257

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,
	2015			2014			2015			2014
Operating revenue:
Regulated electric	$	461		$	426		$	887		$	876
Regulated gas	110			136			405			647
Nonregulated	222			207			447			471
Total operating revenue	793			769			1,739			1,994
Operating costs and expenses:
Regulated:
Cost of fuel, energy and capacity	104			120			226			266
Cost of gas sold	55			83			256			492
Other operating expenses	119			123			236			232
Maintenance	51			77			100			121
Depreciation and amortization	99			85			199			170
Property and other taxes	30			29			63			61
Total regulated operating costs and expenses	458			517			1,080			1,342
Nonregulated:
Cost of sales	204			194			416			435
Other	9			7			15			13
Total nonregulated operating costs and expenses	213			201			431			448
Total operating costs and expenses	671			718			1,511			1,790
Operating income	122			51			228			204
Non-operating income:
Interest income	1			1			1			1
Allowance for equity funds	6			10			11			19
Other, net	—			3			4			5
Total non-operating income	7			14			16			25
Fixed charges:
Interest on long-term debt	44			45			88			85
Other interest expense	1			1			1			1
Allowance for borrowed funds	(2		)	(4		)	(4		)	(8		)
Total fixed charges	43			42			85			78
Income before income tax benefit	86			23			159			151
Income tax benefit	(45		)	(9		)	(66		)	(38		)
Net income	$	131		$	32		$	225		$	189

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,
	2015			2014		2015			2014
Net income	$	131		$	32	$	225		$	189
Other comprehensive (loss) income, net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $- and $1	1			—		1			1
Unrealized (losses) gains on cash flow hedges, net of tax of $(3), $6, $(1) and $16	(6		)	9		(4		)	23
Total other comprehensive (loss) income, net of tax	(5		)	9		(3		)	24
Comprehensive income	$	126		$	41	$	222		$	213

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

5

MIDAMERICAN ENERGY COMPANY

STATEMENTS OF CHANGES IN EQUITY (Unaudited)

(Amounts in millions)

	Common Stock		Retained Earnings		Accumulated Other Comprehensive (Loss) Income, Net			Total Equity
Balance, December 31, 2013	$	561	$	3,295	$	(11	)	$	3,845
Net income	—		189		—			189
Other comprehensive income	—		—		24			24
Balance, June 30, 2014	$	561	$	3,484	$	13		$	4,058
Balance, December 31, 2014	$	561	$	3,712	$	(23	)	$	4,250
Net income	—		225		—			225
Other comprehensive loss	—		—		(3		)	(3		)
Balance, June 30, 2015	$	561	$	3,937	$	(26	)	$	4,472

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,
	2015			2014
Cash flows from operating activities:
Net income	$	225		$	189
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	199			170
Deferred income taxes and amortization of investment tax credits	4			17
Changes in other assets and liabilities	24			22
Other, net	5			(29		)
Changes in other operating assets and liabilities:
Receivables, net	40			(1		)
Inventories	4			50
Derivative collateral, net	35			(47		)
Pension and other postretirement benefit plans	(4		)	(1		)
Accounts payable	(103		)	(22		)
Taxes accrued, net	308			34
Other current assets and liabilities	16			18
Net cash flows from operating activities	753			400
Cash flows from investing activities:
Utility construction expenditures	(428		)	(432		)
Purchases of available-for-sale securities	(61		)	(47		)
Proceeds from sales of available-for-sale securities	56			44
Other, net	3			4
Net cash flows from investing activities	(430		)	(431		)
Cash flows from financing activities:
Proceeds from long-term debt	—			847
Repayments of long-term debt	—			(356		)
Net repayments of short-term debt	(50		)	—
Other, net	—			(7		)
Net cash flows from financing activities	(50		)	484
Net change in cash and cash equivalents	273			453
Cash and cash equivalents at beginning of period	29			194
Cash and cash equivalents at end of period	$	302		$	647

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 Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE 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 unaudited Financial Statements as of June 30, 2015, and for the three- and six-month periods ended June 30, 2015 and 2014. The results of operations for the three- and six-month periods ended June 30, 2015, 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, 2014, 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, 2015.

(2) New Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-03, which amends FASB Accounting Standards Codification ("ASC") Subtopic 835-30, "Interest - Imputation of Interest." The amendments in this guidance require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability instead of as an asset. This guidance is effective for interim and annual reporting periods beginning after December 15, 2015, with early adoption permitted. This guidance must be adopted retrospectively, wherein the balance sheet of each period presented should be adjusted to reflect the new guidance. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements and disclosures included within Notes to Financial Statements.

In May 2014, the FASB issued ASU No. 2014-09, which creates FASB ASC Topic 606, "Revenue from Contracts with Customers" and supersedes ASC Topic 605, "Revenue Recognition." The guidance replaces industry-specific guidance and establishes a single five-step model to identify and recognize revenue. The core principle of the guidance is that an entity should recognize revenue upon transfer of control of promised goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled in exchange for those goods or services. Additionally, the guidance requires the entity to disclose further quantitative and qualitative information regarding the nature and amount of revenues arising from contracts with customers, as well as other information about the significant judgments and estimates used in recognizing revenues from contracts with customers. In July 2015, the FASB decided to defer the effective date one year to interim and annual reporting periods beginning after December 15, 2017. This guidance may be adopted retrospectively or under a modified retrospective method where the cumulative effect is recognized at the date of initial application. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements and disclosures included within Notes to Financial Statements.

8

(3) Components of Accumulated Other Comprehensive Income (Loss), Net

The following table shows the change in accumulated other comprehensive income (loss), net ("AOCI") by each component of other comprehensive income, net of applicable income taxes (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			(Losses) Gains			Other
	Available-For-Sale			on Cash Flow			Comprehensive
	Securities			Hedges			(Loss) Income, Net
Balance, December 31, 2013	$	(4	)	$	(7	)	$	(11	)
Other comprehensive income	1			23			24
Balance, June 30, 2014	$	(3	)	$	16		$	13
Balance, December 31, 2014	$	(3	)	$	(20	)	$	(23	)
Other comprehensive income (loss)	1			(4		)	(3		)
Balance, June 30, 2015	$	(2	)	$	(24	)	$	(26	)

For information regarding cash flow hedge reclassifications from AOCI to net income in their entirety, refer to Note 6.

(4) Income Taxes

A reconciliation of the federal statutory income tax rate to MidAmerican Energy's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(66	)	(62	)	(62	)	(55	)
State income tax, net of federal income tax benefit	(8	)	(3	)	(3	)	1
Effects of ratemaking	(13	)	(8	)	(12	)	(5	)
Other, net	—		(1	)	—		(1	)
Effective income tax rate	(52	)%	(39	)%	(42	)%	(25	)%

Income tax credits relate primarily to production tax credits from 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 are placed in service.

Berkshire Hathaway includes BHE 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 BHE. MidAmerican Energy received net cash payments for income taxes from BHE totaling $373 million and $86 million for the six-month periods ended June 30, 2015 and 2014, respectively.

(5) Employee Benefit Plans

MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc.

9

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,
	2015			2014			2015			2014
Pension:
Service cost	$	3		$	4		$	6		$	7
Interest cost	8			9			16			18
Expected return on plan assets	(12		)	(12		)	(23		)	(23		)
Net amortization	1			—			1			1
Net periodic benefit cost	$	—		$	1		$	—		$	3
Other postretirement:
Service cost	$	1		$	2		$	3		$	3
Interest cost	3			3			5			5
Expected return on plan assets	(3		)	(4		)	(7		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit cost (benefit)	$	—		$	—		$	(1	)	$	(1	)

Employer contributions to the pension and other postretirement benefit plans are expected to be $8 million and $1 million, respectively, during 2015. As of June 30, 2015, $4 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

(6) 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, which creates contractual obligations to provide electric and natural gas services. 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 7 for additional information on derivative contracts.

10

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, 2015:
Not designated as hedging contracts(1):
Commodity assets	$	11		$	3	$	15		$	—		$	29
Commodity liabilities	(1		)	—		(51		)	(5		)	(57		)
Total	10			3		(36		)	(5		)	(28		)
Designated as hedging contracts:
Commodity assets	—			—		2			2			4
Commodity liabilities	—			—		(24		)	(20		)	(44		)
Total	—			—		(22		)	(18		)	(40		)
Total derivatives	10			3		(58		)	(23		)	(68		)
Cash collateral receivable	—			—		26			5			31
Total derivatives - net basis	$	10		$	3	$	(32	)	$	(18	)	$	(37	)

As of December 31, 2014:
Not designated as hedging contracts(1):
Commodity assets	$	14	$	3	$	19		$	1		$	37
Commodity liabilities	—		—		(69		)	(4		)	(73		)
Total	14		3		(50		)	(3		)	(36		)
Designated as hedging contracts:
Commodity assets	—		—		4			2			6
Commodity liabilities	—		—		(27		)	(17		)	(44		)
Total	—		—		(23		)	(15		)	(38		)
Total derivatives	14		3		(73		)	(18		)	(74		)
Cash collateral receivable	—		—		42			5			47
Total derivatives - net basis	$	14	$	3	$	(31	)	$	(13	)	$	(27	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2015 and December 31, 2014, a net regulatory asset of $28 million and $38 million, respectively, was recorded related to the net derivative liability of $28 million and $36 million, respectively.

11

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,
	2015			2014			2015			2014
Beginning balance	$	18		$	32		$	38		$	10
Changes in fair value recognized in net regulatory assets	17			20			19			62
Net losses reclassified to operating revenue	(6		)	(5		)	(22		)	(24		)
Net (losses) gains reclassified to cost of gas sold	(1		)	1			(7		)	—
Ending balance	$	28		$	48		$	28		$	48

The following table summarizes the pre-tax gains (losses) included on the Statements of Operations associated with MidAmerican Energy's commodity 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,
	2015			2014		2015			2014
Nonregulated operating revenue	$	1		$	1	$	4		$	(8	)
Regulated cost of gas sold	1			—		2			—
Nonregulated cost of sales	(1		)	—		(5		)	21
Total	$	1		$	1	$	1		$	13

Designated as Hedging Contracts

MidAmerican Energy uses commodity 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 (income) 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,
	2015			2014			2015			2014
Beginning balance	$	30		$	(13	)	$	34		$	11
Changes in fair value recognized in OCI	25			(21		)	19			(79		)
Net (losses) gains reclassified to nonregulated cost of sales	(16		)	6			(14		)	40
Ending balance	$	39		$	(28	)	$	39		$	(28	)

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-month periods ended June 30, 2015 and 2014, hedge ineffectiveness was insignificant, and for the six-month periods ended June 30, 2015 and 2014, hedge ineffectiveness was a pre-tax gain of $1 million and $- million, respectively. As of June 30, 2015, MidAmerican Energy had cash flow hedges with expiration dates extending through December 2019, and $22 million of pre-tax net unrealized losses are forecasted to be reclassified from AOCI into earnings over the next twelve months as contracts settle.

12

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	2015	2014
Electricity purchases	Megawatt hours	16	14
Natural gas purchases	Decatherms	17	19

Credit Risk

MidAmerican Energy is exposed to counterparty credit risk associated with wholesale energy supply and marketing activities with other utilities, energy marketing companies, financial institutions and other market participants. Credit risk may be concentrated to the extent MidAmerican Energy's counterparties have similar economic, industry or other characteristics and due to direct or indirect relationships among the counterparties. Before entering into a transaction, MidAmerican Energy analyzes the financial condition of each significant wholesale counterparty, 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 further mitigate wholesale counterparty credit risk, 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. If required, MidAmerican Energy exercises rights under these arrangements, including calling on the counterparty's credit support arrangement.

Collateral and Contingent Features

In accordance with industry practice, certain wholesale derivative contracts contain credit support provisions that in part base MidAmerican Energy's collateral requirements on its credit ratings for senior unsecured debt as reported by one or more of the three recognized credit rating agencies. 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," or in some cases terminate the contract, 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, 2015, 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 $60 million and $52 million as of June 30, 2015 and December 31, 2014, respectively, for which MidAmerican Energy had posted collateral of $- million at each date. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of June 30, 2015 and December 31, 2014, MidAmerican Energy would have been required to post $52 million and $36 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.

13

(7) 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.

14

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, 2015:
Assets:
Commodity derivatives	$	—		$	20		$	13		$	(20	)	$	13
Money market mutual funds(2)	292			—			—			—			292
Debt securities:
United States government obligations	131			—			—			—			131
International government obligations	—			3			—			—			3
Corporate obligations	—			40			—			—			40
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			3			—			—			3
Auction rate securities	—			—			27			—			27
Equity securities:
United States companies	239			—			—			—			239
International companies	6			—			—			—			6
Investment funds	4			—			—			—			4
	$	672		$	68		$	40		$	(20	)	$	760
Liabilities - commodity derivatives	$	(12	)	$	(69	)	$	(20	)	$	51		$	(50	)

As of December 31, 2014:
Assets:
Commodity derivatives	$	1		$	18		$	24		$	(26	)	$	17
Money market mutual funds(2)	1			—			—			—			1
Debt securities:
United States government obligations	136			—			—			—			136
International government obligations	—			1			—			—			1
Corporate obligations	—			39			—			—			39
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			26			—			26
Equity securities:
United States companies	238			—			—			—			238
International companies	5			—			—			—			5
	$	381		$	62		$	50		$	(26	)	$	467
Liabilities - commodity derivatives	$	(18	)	$	(87	)	$	(12	)	$	73		$	(44	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $31 million and $47 million as of June 30, 2015 and December 31, 2014, 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.

15

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 6 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 stated at fair value and are primarily accounted for as available-for-sale securities. 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
2015:
Beginning balance	$	9		$	26	$	12		$	26
Changes included in earnings(1)	2			—		4			—
Changes in fair value recognized in OCI	(4		)	1		(3		)	1
Changes in fair value recognized in net regulatory assets	(15		)	—		(15		)	—
Purchases	1			—		1			—
Settlements	—			—		(6		)	—
Ending balance	$	(7	)	$	27	$	(7	)	$	27
2014:
Beginning balance	$	(2	)	$	25	$	(3	)	$	23
Changes included in earnings(1)	2			—		(4		)	—
Changes in fair value recognized in OCI	1			—		4			2
Changes in fair value recognized in net regulatory assets	(4		)	—		(1		)	—
Settlements	1			—		2			—
Ending balance	$	(2	)	$	25	$	(2	)	$	25

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2015 and 2014, net unrealized gains included in earnings for the three-month periods ended June 30, 2015 and 2014, totaled $1 million and $2 million, respectively, and for the six-month periods ended June 30, 2015 and 2014, totaled $4 million and $1 million, respectively .

16

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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,065	$	4,447	$	4,056	$	4,581

(8) 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.

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.

(9) 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.

17

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

	Three-Month Periods					Six-Month Periods
	Ended June 30,					Ended June 30,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Total operating revenue	$	793	$	769		$	1,739	$	1,994
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Total operating income	$	122	$	51		$	228	$	204

	As of
	June 30, 2015		December 31, 2014
Total assets:
Regulated electric	$	12,220	$	11,859
Regulated gas	1,165		1,231
Nonregulated energy	174		167
Total assets	$	13,559	$	13,257

(10) Transfer of Nonregulated Energy Operations

In the second quarter of 2015, MidAmerican Energy filed with the Iowa Utilities Board and Illinois Commerce Commission for approval to transfer the operations, assets and liabilities of its unregulated retail services business to a subsidiary of BHE. The transfer, which would include substantially all of the net assets of MidAmerican Energy's nonregulated energy reportable segment, would be made at MidAmerican Energy’s carrying value of the assets and liabilities, resulting in no gain or loss. The transaction would be accounted for as a dividend and is expected to occur in the first quarter of 2016.

18

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, 2015, and the related consolidated statements of operations and comprehensive income for the three-month and six-month periods ended June 30, 2015 and 2014, and of changes in equity and cash flows for the six-month periods ended June 30, 2015 and 2014. 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, 2014, 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 February 27, 2015, 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, 2014 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 7, 2015

19

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (Unaudited)

(Amounts in millions)

	As of
	June 30, 2015			December 31, 2014
ASSETS
Utility plant, net:
Electric	$	13,534		$	13,426
Gas	1,462			1,432
Gross utility plant in service	14,996			14,858
Accumulated depreciation and amortization	(5,042		)	(4,954		)
Utility plant in service, net	9,954			9,904
Construction work in progress	893			606
Total utility plant, net	10,847			10,510
Current assets:
Cash and cash equivalents	303			30
Receivables, net	395			437
Income taxes receivable	—			303
Inventories	181			185
Other	81			87
Total current assets	960			1,042
Other assets:
Goodwill	1,270			1,270
Regulatory assets	959			908
Investments and nonregulated property, net	656			651
Other	153			163
Total other assets	3,038			2,992
Total assets	$	14,845		$	14,544
CAPITALIZATION AND LIABILITIES
Capitalization:
MidAmerican Funding member's equity	$	5,298		$	5,073
Long-term debt, excluding current portion	3,959			3,955
Total capitalization	9,257			9,028
Current liabilities:
Short-term debt	—			50
Current portion of long-term debt	431			426
Note payable to affiliate	130			136
Accounts payable	373			392
Taxes accrued	136			128
Interest accrued	48			48
Other	161			131
Total current liabilities	1,279			1,311
Other liabilities:
Deferred income taxes	2,733			2,657
Asset retirement obligations	457			432
Regulatory liabilities	836			837
Other	283			279
Total other liabilities	4,309			4,205
Total capitalization and liabilities	$	14,845		$	14,544

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

20

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,
	2015			2014			2015			2014
Operating revenue:
Regulated electric	$	461		$	426		$	887		$	876
Regulated gas	110			136			405			647
Nonregulated	226			213			456			482
Total operating revenue	797			775			1,748			2,005
Operating costs and expenses:
Regulated:
Cost of fuel, energy and capacity	104			120			226			266
Cost of gas sold	55			83			256			492
Other operating expenses	119			123			236			232
Maintenance	51			77			100			121
Depreciation and amortization	99			85			199			170
Property and other taxes	30			29			63			61
Total regulated operating costs and expenses	458			517			1,080			1,342
Nonregulated:
Cost of sales	207			194			423			435
Other	10			13			16			24
Total nonregulated operating costs and expenses	217			207			439			459
Total operating costs and expenses	675			724			1,519			1,801
Operating income	122			51			229			204
Non-operating income:
Interest income	1			1			1			1
Allowance for equity funds	6			10			11			19
Other, net	1			4			18			9
Total non-operating income	8			15			30			29
Fixed charges:
Interest on long-term debt	49			50			99			96
Other interest expense	1			1			1			1
Allowance for borrowed funds	(2		)	(4		)	(4		)	(8		)
Total fixed charges	48			47			96			89
Income before income tax benefit	82			19			163			144
Income tax benefit	(47		)	(11		)	(65		)	(41		)
Net income	$	129		$	30		$	228		$	185

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

21

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,
	2015			2014		2015			2014
Net income	$	129		$	30	$	228		$	185
Other comprehensive (loss) income, net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $- and $1	1			—		1			1
Unrealized (losses) gains on cash flow hedges, net of tax of $(3), $6, $(1) and $16	(6		)	9		(4		)	23
Total other comprehensive (loss) income, net of tax	(5		)	9		(3		)	24
Comprehensive income	$	124		$	39	$	225		$	209

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

22

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited)

(Amounts in millions)

	Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive (Loss) Income, Net			Total Equity
Balance, December 31, 2013	$	1,679	$	3,009		$	(11	)	$	4,677
Net income	—		185			—			185
Other comprehensive income	—		—			24			24
Other equity transactions	—		(1		)	—			(1		)
Balance, June 30, 2014	$	1,679	$	3,193		$	13		$	4,885
Balance, December 31, 2014	$	1,679	$	3,417		$	(23	)	$	5,073
Net income	—		228			—			228
Other comprehensive loss	—		—			(3		)	(3		)
Balance, June 30, 2015	$	1,679	$	3,645		$	(26	)	$	5,298

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

23

MIDAMERICAN FUNDING, LLC AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(Amounts in millions)

	Six-Month Periods
	Ended June 30,
	2015			2014
Cash flows from operating activities:
Net income	$	228		$	185
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	199			170
Deferred income taxes and amortization of investment tax credits	4			16
Changes in other assets and liabilities	24			22
Other, net	(9		)	(27		)
Changes in other operating assets and liabilities:
Receivables, net	42			(1		)
Inventories	4			50
Derivative collateral, net	35			(47		)
Pension and other postretirement benefit plans	(4		)	(1		)
Accounts payable	(103		)	(22		)
Taxes accrued, net	310			33
Other current assets and liabilities	16			18
Net cash flows from operating activities	746			396
Cash flows from investing activities:
Utility construction expenditures	(428		)	(432		)
Purchases of available-for-sale securities	(61		)	(47		)
Proceeds from sales of available-for-sale securities	56			44
Proceeds from sales of investments	13			—
Other, net	3			6
Net cash flows from investing activities	(417		)	(429		)
Cash flows from financing activities:
Proceeds from long-term debt	—			847
Repayment of long-term debt	—			(356		)
Net change in note payable to affiliate	(6		)	2
Net repayments of short-term debt	(50		)	—
Other, net	—			(7		)
Net cash flows from financing activities	(56		)	486
Net change in cash and cash equivalents	273			453
Cash and cash equivalents at beginning of period	30			194
Cash and cash equivalents at end of period	$	303		$	647

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

24

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 Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE 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 unaudited Consolidated Financial Statements as of June 30, 2015, and for the three- and six-month periods ended June 30, 2015 and 2014. The results of operations for the three- and six-month periods ended June 30, 2015, 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, 2014, 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, 2015.

Refer to Note 1 of MidAmerican Energy's Notes to Financial Statements.

(2) New Accounting Pronouncements

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

(3) Components of Accumulated Other Comprehensive Income (Loss), Net

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

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(4) Income Taxes

A reconciliation of the federal statutory income tax rate to MidAmerican Funding's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(70	)	(79	)	(60	)	(58	)
State income tax, net of federal income tax benefit	(9	)	(5	)	(3	)	1
Effects of ratemaking	(13	)	(10	)	(11	)	(5	)
Other, net	—		1		(1	)	(1	)
Effective income tax rate	(57	)%	(58	)%	(40	)%	(28	)%

Income tax credits relate primarily to production tax credits from 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 are placed in service.

Berkshire Hathaway includes BHE 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 BHE. MidAmerican Funding received net cash payments for income taxes from BHE totaling $374 million and $87 million for the six-month periods ended June 30, 2015 and 2014, respectively.

(5) Employee Benefit Plans

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

(6) Risk Management and Hedging Activities

Refer to Note 6 of MidAmerican Energy's Notes to Financial Statements.

(7) Fair Value Measurements

Refer to Note 7 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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,390	$	4,886	$	4,381	$	5,012

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(8) 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 8 of MidAmerican Energy's Notes to Financial Statements.

(9)    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,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Other	4		6			9		11
Total operating revenue	$	797	$	775		$	1,748	$	2,005
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Other	—		—			1		—
Total operating income	$	122	$	51		$	229	$	204

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	As of
	June 30, 2015		December 31, 2014
Total assets(1):
Regulated electric	$	13,411	$	13,050
Regulated gas	1,244		1,310
Nonregulated energy	174		167
Other	16		17
Total assets	$	14,845	$	14,544

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

(10) Transfer of Nonregulated Energy Operations

Refer to Note 10 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 BHE. 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. MHC Inc., MidAmerican Funding and BHE 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 Financial Statements and Notes to 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 2015 and 2014

Overview

MidAmerican Energy -

MidAmerican Energy's net income for the second quarter of 2015 was $131 million, an increase of $99 million compared to 2014 due to higher regulated electric margins of $51 million, substantially from changes in electric retail rates and rate structure and lower energy costs, higher recognized production tax credits of $43 million and other income tax benefits, lower fossil-fueled generation maintenance of $21 million due to planned outages in 2014 and a one-time refund of $8 million to customers in 2014 of insurance recoveries related to environmental matters, partially offset by higher depreciation and amortization of $14 million due to wind-powered generation and other plant placed in service, lower AFUDC of $6 million and higher income taxes on greater pre-tax income.

MidAmerican Energy's net income for the first six months of 2015 was $225 million, an increase of $36 million, or 19%, compared to 2014 due to higher regulated electric margins of $51 million from changes in electric retail rates and rate structure, lower energy costs and higher transmission revenue related to MidAmerican Energy's Multi-Value Projects ("MVPs"), lower fossil-fueled generation maintenance of $21 million due to planned outages in 2014, higher recognized production tax credits of $16 million and a one-time refund of $8 million to customers in 2014 of insurance recoveries related to environmental matters, partially offset by higher depreciation and amortization of $29 million due to wind-powered generation and other plant placed in-service, lower AFUDC of $12 million and lower natural gas margins of $6 million primarily from colder than normal winter temperatures in 2014.

MidAmerican Funding -

MidAmerican Funding's net income for the second quarter of 2015 was $129 million, an increase of $99 million compared to 2014 and, for the first six months of 2015, was $228 million, an increase of $43 million, or 23%, compared to 2014. In addition to the changes in MidAmerican Energy's earnings discussed above, MidAmerican Funding recognized an $8 million after-tax gain on the sale of an investment in a generating facility lease in the first quarter of 2015.

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Regulated Electric Gross Margin

A comparison of key operating results related to regulated electric gross margin is as follows:

	Second Quarter									First Six Months
	2015		2014		Change					2015		2014		Change
Gross margin (in millions):
Operating revenue	$	461	$	426	$	35		8	%	$	887	$	876	$	11		1	%
Cost of fuel, energy and capacity	104		120		(16		)	(13	)	226		266		(40		)	(15	)
Gross margin	$	357	$	306	$	51		17		$	661	$	610	$	51		8
Electricity Sales (GWh):
Residential	1,223		1,393		(170		)	(12	)%	2,966		3,260		(294		)	(9	)%
Small general service	872		1,025		(153		)	(15	)	1,868		2,117		(249		)	(12	)
Large general service	2,981		2,755		226			8		5,673		5,170		503			10
Other	382		405		(23		)	(6	)	782		818		(36		)	(4	)
Total retail	5,458		5,578		(120		)	(2	)	11,289		11,365		(76		)	(1	)
Wholesale	2,171		1,513		658			43		5,021		4,375		646			15
Total sales	7,629		7,091		538			8		16,310		15,740		570			4
Average number of retail customers (in thousands)	751		744		7			1	%	751		744		7			1	%
Average revenue per MWh:
Retail	$	73.59	$	67.39	$	6.20		9	%	$	67.22	$	65.12	$	2.10		3	%
Wholesale	$	20.87	$	27.08	$	(6.21	)	(23	)%	$	20.08	$	26.73	$	(6.65	)	(25	)%
Heating degree days	468		605		(137		)	(23	)%	3,797		4,420		(623		)	(14	)%
Cooling degree days	292		343		(51		)	(15	)%	294		343		(49		)	(14	)%
Sources of energy (GWh)(1):
Coal	3,815		3,550		265			7	%	8,377		8,297		80			1	%
Nuclear	988		806		182			23		1,864		1,798		66			4
Natural gas	5		49		(44		)	(90	)	—		68		(68		)	(100	)
Wind and other(2)	2,184		1,965		219			11		4,825		4,306		519			12
Total energy generated	6,992		6,370		622			10		15,066		14,469		597			4
Energy purchased	744		784		(40		)	(5	)	1,437		1,598		(161		)	(10	)
Total	7,736		7,154		582			8		16,503		16,067		436			3

(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.

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Electric gross margin for the second quarter of 2015 increased $51 million compared to 2014 due to a higher retail gross margin of $37 million, a higher wholesale gross margin of $9 million and higher MVP transmission revenue of $5 million, which is expected to increase as the projects are constructed over the next two years. Retail gross margin increased due to $36 million from higher electric retail rates, $10 million from lower retail energy costs due to a lower average cost of fuel for generation and lower purchased power costs, and $6 million from higher recoveries through adjustment clauses, including DSM, partially offset by $8 million from lower sales volumes for weather-sensitive customers due to milder temperatures in 2015 and $7 million primarily from other retail usage factors, net of strong industrial sales growth. In addition to increases in electric retail base rates, the increase in electric retail rates reflects changes in Iowa rate structure related to seasonal pricing that were effective with the implementation of final Iowa base rates in August 2014, which result in a greater differential between higher rates from June to September and lower rates in the remaining months. The increases in retail base rates include higher rates of $45 million annually, effective January 2015, for the second step of the 2014 Iowa rate increase and $16 million annually in Illinois, effective December 2014. Wholesale gross margin increased primarily due to a higher average margin per megawatt hour sold. Wholesale includes sales of electricity principally to markets operated by regional transmission organizations.

Electric gross margin for the first six months of 2015 increased $51 million compared to 2014 due to a higher retail gross margin of $36 million, a higher wholesale gross margin of $5 million and higher MVP transmission revenue of $10 million, which is expected to increase as the projects are constructed over the next two years. Retail gross margin increased due to $21 million from higher recoveries through adjustment clauses, including DSM, $19 million from higher electric retail rates and $16 million primarily from a lower average cost of fuel for retail generation, partially offset by $16 million from lower sales volumes for weather-sensitive customers due to milder temperatures in 2015 and $4 million from other items such as steam sales. The increase in electric retail rates reflects the increases in Iowa and Illinois base rates discussed above, partially offset by changes in Iowa rate structure related to seasonal pricing. Wholesale gross margin increased primarily due to a higher average margin per megawatt hour sold.

Regulated Gas Gross Margin

A comparison of key operating results related to regulated gas gross margin is as follows:

	Second Quarter									First Six Months
	2015		2014		Change					2015		2014		Change
Gross margin (in millions):
Operating revenue	$	110	$	136	$	(26	)	(19)	%	$	405	$	647	$	(242	)	(37)	%
Cost of gas sold	55		83		(28		)	(34	)	256		492		(236		)	(48	)
Gross margin	$	55	$	53	$	2		4		$	149	$	155	$	(6	)	(4	)
Natural gas throughput (000's Dth):
Residential	5,617		6,724		(1,107		)	(16)	%	30,648		36,041		(5,393		)	(15)	%
Small general service	2,962		3,454		(492		)	(14	)	15,070		17,543		(2,473		)	(14	)
Large general service	1,048		1,178		(130		)	(11	)	2,591		2,783		(192		)	(7	)
Other	5		8		(3		)	(38	)	27		35		(8		)	(23	)
Total retail sales	9,632		11,364		(1,732		)	(15	)	48,336		56,402		(8,066		)	(14	)
Wholesale sales	7,366		4,972		2,394			48		19,683		12,873		6,810			53
Total sales	16,998		16,336		662			4		68,019		69,275		(1,256		)	(2	)
Gas transportation service	17,779		18,889		(1,110		)	(6	)	41,748		44,672		(2,924		)	(7	)
Total gas throughput	34,777		35,225		(448		)	(1	)	109,767		113,947		(4,180		)	(4	)
Average number of retail customers (in thousands)	729		722		7			1	%	731		724		7			1	%
Average revenue per retail Dth sold	$	8.68	$	9.37	$	(0.69	)	(7)	%	$	6.81	$	9.66	$	(2.85	)	(30)	%
Average cost of natural gas per retail Dth sold	$	3.72	$	5.35	$	(1.63	)	(30)	%	$	4.09	$	7.24	$	(3.15	)	(44)	%
Combined retail and wholesale average cost of natural gas per Dth sold	$	3.25	$	5.11	$	(1.86	)	(36)	%	$	3.76	$	7.11	$	(3.35	)	(47)	%
Heating degree days	503		647		(144		)	(22)	%	3,951		4,601		(650		)	(14)	%

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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.

Regulated gas gross margin for the second quarter of 2015 increased $2 million compared to 2014 due to a higher average margin on sales and higher recoveries of DSM program costs, partially offset by lower retail sales volumes from warmer temperatures in 2015. For the second quarter of 2015, MidAmerican Energy's combined retail and wholesale average per-unit cost of gas sold decreased 36%, resulting in a decrease of $34 million in gas revenue and cost of gas sold compared to 2014, which was partially offset by the increase in total sales volumes compared to 2014.

Regulated gas gross margin for the first six months of 2015 decreased $6 million compared to 2014 due to lower retail sales volumes in 2015 primarily as a result of colder than normal winter temperatures in 2014, partially offset by a higher average margin on sales and higher recoveries of DSM program costs. For the first six months of 2015, MidAmerican Energy's combined retail and wholesale average per-unit cost of gas sold decreased 47%, resulting in a decrease of $228 million in gas revenue and cost of gas sold compared to 2014. Additionally, the decrease in total sales volumes compared to 2014 decreased revenue and cost of gas sold for the first six months of 2014.

Regulated Operating Costs and Expenses

Other operating expenses for the second quarter of 2015 decreased $4 million compared to 2014 due to a one-time refund of $8 million to MidAmerican Energy's customers in June 2014 for insurance recoveries related to environmental matters, partially offset by $4 million of higher DSM program costs, which are matched by increases in regulated electric and gas revenue.

Other operating expenses for the first six months of 2015 increased $4 million compared to 2014 due to $14 million of higher DSM program costs, which are matched by increases in regulated electric and gas revenue, and $3 million of higher transmission operations costs, partially offset by a one-time refund of $8 million to MidAmerican Energy's customers in June 2014 for insurance recoveries related to environmental matters and a decrease in deferred compensation, pension and postretirement costs.

Maintenance expense decreased $26 million for the second quarter of 2015 and $21 million for the first six months of 2015 compared to 2014 due to $21 million of lower fossil-fueled generation maintenance primarily from planned major outages in 2014 at Walter Scott, Jr. Energy Center Unit 4 and George Neal Energy Center Unit 3 and $5 million of lower electric distribution maintenance due in part to emergency storm restoration in 2014. For the first six months of 2015, the decreases were partially offset by higher wind-powered generating facility maintenance costs.

Depreciation and amortization expense increased $14 million for the second quarter of 2015 and $29 million for the first six months of 2015 compared to 2014 due to utility plant additions, including 511 MW (nominal ratings) of wind-powered generating facilities placed in-service in the fourth quarter of 2014.

Nonregulated Gross Margin

MidAmerican Energy -

	Second Quarter									First Six Months
	2015		2014		Change					2015		2014		Change
Gross margin (in millions):
Nonregulated operating revenue	$	222	$	207	$	15		7	%	$	447	$	471	$	(24	)	(5	)%
Nonregulated cost of sales	204		194		10			5		416		435		(19		)	(4	)
Nonregulated gross margin	$	18	$	13	$	5		38		$	31	$	36	$	(5	)	(14	)
Nonregulated electric sales (GWh)	2,691		2,352		339			14	%	5,165		4,586		579			13	%
Nonregulated gas sales (000's Dth)	6,422		6,864		(442		)	(6	)%	16,694		18,254		(1,560		)	(9	)%

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For the second quarter of 2015 compared to 2014, nonregulated operating revenue and cost of sales increased due to higher nonregulated electric volumes, prices and per-unit costs, partially offset by lower prices, per-unit costs and volumes for nonregulated gas activities. Nonregulated gross margin increased due to higher average margins per unit sold on higher nonregulated electric sales.

For the first six months of 2015 compared to 2014, nonregulated operating revenue and cost of sales decreased due to lower prices and per-unit costs on lower gas volumes, partially offset by an increase in nonregulated electric volumes, prices and per-unit costs. Nonregulated gross margin decreased due to lower average margins per unit sold on nonregulated gas sales, lower nonregulated gas sales and lower income from the portion of margins on regulated gas wholesale sales that is retained by MidAmerican Energy, partially offset by higher nonregulated electric sales and average margins per unit sold.

Non-Operating Income

MidAmerican Energy -

Allowance for equity funds decreased $4 million for the second quarter of 2015 and $8 million for the first six months of 2015 compared to 2014 primarily due to lower construction work-in-progress balances related to the installation of emissions control equipment at a number of MidAmerican Energy's jointly owned generating facilities. MidAmerican Energy's other, net decreased $3 million for the second quarter of 2015 and $1 million for the first six months of 2015 compared to 2014 primarily due to fluctuations in returns from corporate-owned life insurance policies.

MidAmerican Funding -

In addition to the fluctuations discussed for MidAmerican Energy, MidAmerican Funding's other, net for the first six months of 2015 reflects a $13 million pre-tax gain on the sale of an investment in a generating facility lease in 2015.

Fixed Charges

MidAmerican Energy -

Interest on long-term debt decreased $1 million for the second quarter of 2015 and increased $3 million for the first six months of 2015 compared to 2014 due to higher interest expense from the issuance of first mortgage bonds totaling $850 million in April 2014, partially offset by a decrease in interest expense from the redemption of $350 million of 4.65% senior notes in May 2014.

Allowance for borrowed funds decreased $2 million for the second quarter of 2015 and $4 million for the first six months of 2015 compared to 2014 primarily due to lower construction work-in-progress balances related to the installation of emissions control equipment at a number of MidAmerican Energy's jointly owned generating facilities.

Income Tax Benefit

MidAmerican Energy -

MidAmerican Energy's income tax benefit increased $36 million for the second quarter of 2015 compared to 2014, and the effective tax rates were (52)% for 2015 and (39)% for 2014. The increase in income tax benefit for the second quarter of 2015 was due to an increase in recognized production tax credits and the effects of ratemaking, partially offset by the impact of a higher pre-tax income.

MidAmerican Energy's income tax benefit increased $28 million for the first six months of 2015 compared to 2014, and the effective tax rates were (42)% for 2015 and (25)% for 2014. The increase in income tax benefit for the first six months of 2015 was due to an increase in recognized production tax credits and the effects of ratemaking, partially offset by the impact of a higher pre-tax income.

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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. Production tax credits recognized in the second quarter of 2015 were $57 million, or $43 million higher than the second quarter of 2014, while production tax credits earned in the second quarter of 2015 were $48 million, or $3 million higher than the second quarter of 2014 primarily due to wind-powered generation placed in service in late 2014. Production tax credits recognized in the first six months of 2015 were $98 million, or $16 million higher than the first six months of 2014, while production tax credits earned in the first six months of 2015 were $107 million, or $7 million higher than the first six months of 2014 primarily due to wind-powered generation placed in service in late 2014. The difference between production tax credits recognized and earned of $9 million as of June 30, 2015 will be recorded in earnings over the remainder of 2015.

MidAmerican Funding -

MidAmerican Funding's income tax benefit increased $36 million for the second quarter of 2015, and the effective tax rates were (57)% for 2015 and (58)% for 2014. The change in the income tax benefit was principally due to the factors discussed for MidAmerican Energy.

MidAmerican Funding's income tax benefit increased $24 million for the first six months of 2015, and the effective tax rates were (40)% for 2015 and (28)% for 2014. The change in the income tax benefit was principally due to the factors discussed for MidAmerican Energy, partially offset by income tax expense related to the gain on the sale of an investment in a generating facility lease in 2015.

Liquidity and Capital Resources

As of June 30, 2015, MidAmerican Energy's total net liquidity was $712 million consisting of $302 million of cash and cash equivalents and $605 million of credit facilities reduced by $195 million of the credit facilities reserved to support MidAmerican Energy's variable-rate tax-exempt bond obligations. As of June 30, 2015, MidAmerican Funding's total net liquidity was $717 million, including $1 million of additional cash and cash equivalents and MHC Inc.'s $4 million credit facility.

Operating Activities

MidAmerican Energy's net cash flows from operating activities for the six-month periods ended June 30, 2015 and 2014, were $753 million and $400 million, respectively. MidAmerican Funding's net cash flows from operating activities for the six-month periods ended June 30, 2015 and 2014, were $746 million and $396 million, respectively. The changes in net cash flows were predominantly due to the timing of MidAmerican Energy's income tax cash flows with BHE, which totaled net cash receipts from BHE of $373 million and $86 million for the first six months of 2015 and 2014, respectively. Income tax cash flows for 2015 reflect the receipt of $255 million of income tax benefits generated in 2014. The timing of MidAmerican Energy's income tax cash flows from period to period can be significantly affected by the estimated federal income tax payment methods and assumptions for each payment date. Additionally, cash flows from operations for the first six months of 2015 increased from higher gross margins for the regulated electric business and lower collateral requirements related to derivative positions, partially offset by the net impact of payables and receivables, largely attributable to the fluctuation in the cost of natural gas.

In December 2014, the Tax Increase Prevention Act of 2014 (the "Act") was signed into law, extending the 50% bonus depreciation for qualifying property purchased and placed in-service before January 1, 2015 and before January 1, 2016 for certain longer-lived assets. Production tax credits were extended for wind power and other forms of non-solar renewable energy projects that begin construction before the end of 2014. As a result of the Act, MidAmerican Energy's cash flows from operations have benefited in 2015 due to bonus depreciation on qualifying assets placed in-service and for production tax credits earned on qualifying projects.

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Investing Activities

MidAmerican Energy's net cash flows from investing activities for the six-month periods ended June 30, 2015 and 2014, were $(430) million and $(431) million, respectively. MidAmerican Funding's net cash flows from investing activities for the six-month periods ended June 30, 2015 and 2014, were $(417) million and $(429) million, respectively. Net cash flows from investing activities consist almost entirely of utility construction expenditures, which were relatively unchanged for the first six months of 2015 compared to 2014. Purchases and proceeds related to available-for-sale securities primarily consist of activity within the Quad Cities Generating Station nuclear decommissioning trust. MidAmerican Funding received $13 million in 2015 related to the sale of an investment in a generating facility lease.

Financing Activities

MidAmerican Energy's net cash flows from financing activities for the six-month periods ended June 30, 2015 and 2014 were $(50) million and $484 million, respectively. MidAmerican Funding's net cash flows from financing activities for the six-month periods ended June 30, 2015 and 2014, were $(56) million and $486 million, respectively. In 2015, MidAmerican Energy made repayments totaling $50 million through its commercial paper program. In April 2014, MidAmerican Energy issued $150 million of 2.40% First Mortgage Bonds due March 2019, $300 million of 3.50% First Mortgage Bonds due October 2024 and $400 million of 4.40% First Mortgage Bonds due October 2044. The net proceeds were used for the optional redemption in May 2014 of $350 million of MidAmerican Energy's 4.65% Senior Notes due October 2014 and for general corporate purposes. MidAmerican Funding paid $6 million in 2015 and received $2 million in 2014 through its note payable with BHE.

Debt Authorizations and Related Matters

MidAmerican Energy has authority from the FERC to issue through June 30, 2016, commercial paper and bank notes aggregating $605 million at interest rates not to exceed the applicable London Interbank Offered Rate ("LIBOR") plus a spread of up to 400 basis points. MidAmerican Energy has a $600 million unsecured 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 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 $800 million of long-term debt securities through November 12, 2016. Additionally, MidAmerican Energy has authorization from the FERC to issue through March 31, 2017, long-term securities totaling up to $1.70 billion at interest rates not to exceed the applicable United States Treasury rate plus a spread of 175 basis points. MidAmerican Energy has authorizations from the Illinois Commerce Commission to issue up to an aggregate of $800 million of additional long-term debt securities, of which $50 million expires December 19, 2015, and $750 million expires December 9, 2016.

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, 2015, MidAmerican Energy's common equity ratio was 52% 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 markets, including the condition of the utility industry.

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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 forecast utility construction expenditures, which exclude amounts for non-cash equity AFUDC and other non-cash items, are approximately $1.5 billion for 2015 and include:

• $791 million for the construction of 657 MW (nominal ratings) of wind-powered generating facilities expected to be placed in service in 2015, including 162 MW (nominal ratings) approved by the IUB in February 2015.

• $166 million for transmission MVP investments. MidAmerican Energy has approval from the Midcontinent Independent System Operator, Inc. for the construction of four MVPs located in Iowa and Illinois, which will add approximately 245 miles of 345 kV transmission line to MidAmerican Energy's transmission system, with remaining expenditures predominantly in 2016.

• Remaining costs primarily relate to routine expenditures for distribution, generation, transmission and other infrastructure needed to serve existing and expected demand.

In April 2015, MidAmerican Energy filed with the IUB an application for ratemaking principles related to the construction of up to 552 MW (nominal ratings) of additional wind-powered generating facilities expected to be placed in service by the end of 2016. In June 2015, MidAmerican Energy and the Iowa Office of Consumer Advocate entered into a settlement agreement relating to the proposal. The settlement agreement, which is subject to IUB approval, establishes a cost cap of $903 million, including AFUDC, and provides for a fixed rate of return on equity of 11.35% 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. MidAmerican Energy has requested IUB approval by the end of the third quarter of 2015.

Contractual Obligations

As of June 30, 2015, 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, 2014.

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 state and local agencies. MidAmerican Energy believes it is in material compliance with all applicable laws and regulations, although many are subject to interpretation that may ultimately be resolved by the courts. Refer to "Liquidity and Capital Resources" for discussion of MidAmerican Energy's forecast 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, 2014.

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Clean Air Act Regulations

National Ambient Air Quality Standards

The Sierra Club filed a lawsuit against the EPA in August 2013 with respect to the one-hour sulfur dioxide standards and its failure to make certain attainment designations in a timely manner. In March 2015, the United States District Court for the Northern District of California ("Northern District of California") accepted as an enforceable order an agreement between the EPA and Sierra Club to resolve litigation concerning the deadline for completing the designations. The Northern District of California's order directed the EPA to complete designations in three phases: the first phase by July 2, 2016; the second phase by December 31, 2017; and the final phase by December 31, 2020. The first phase of the designations require the EPA to designate two groups of areas: 1) areas that have newly monitored violations of the 2020 sulfur dioxide standard; and 2) areas that contain any stationary source that, according to the EPA's data, either emitted more than 16,000 tons of sulfur dioxide in 2012 or emitted more than 2,600 tons of sulfur dioxide and had an emission rate of at least 0.45 lbs/sulfur dioxide per million British thermal unit in 2012 and, as of March 2, 2015, had not been announced for retirement. MidAmerican Energy's George Neal Unit 4 and the Ottumwa Generating Station (in which MidAmerican Energy has a majority ownership interest in, but does not operate), are included as units subject to the first phase of the designations, having emitted more than 2,600 tons of sulfur dioxide and having an emission rate of at least 0.45 lbs/sulfur dioxide per million British thermal unit in 2012. States may submit to the EPA updated recommendations and supporting information for the EPA to consider in making its determinations and Iowa intends to submit such updated and supporting information by the specified deadline of September 18, 2015. The EPA intends to promulgate final sulfur dioxide area designations no later than July 2, 2016.

Mercury and Air Toxics Standards

Numerous lawsuits have been filed in the United States Court of Appeals for the District of Columbia Circuit ("D.C. Circuit") challenging the Mercury and Air Toxics Standards ("MATS"). In April 2014, the D.C. Circuit upheld the MATS requirements. In November 2014, the United States Supreme Court agreed to hear the MATS appeal on the limited issue of whether the EPA unreasonably refused to consider costs in determining whether it is appropriate to regulate hazardous air pollutants emitted by electric utilities. Oral argument in the case was held before the United States Supreme Court in March 2015, and a decision was issued by the United States Supreme Court in June 2015, which reversed and remanded the MATS rule to the D.C. Circuit for further action. The United States Supreme Court held that the EPA had acted unreasonably when it deemed cost irrelevant to the decision to regulate generating facilities, and that cost, including costs of compliance, must be considered before deciding whether regulation is necessary and appropriate. The United States Supreme Court's decision did not vacate or stay implementation of the MATS rule, and until the D.C. Circuit takes further action, MidAmerican Energy continues to have a legal obligation under the MATS rule and its permits issued by the states in which it operates to comply with the MATS rule, including operating all emissions controls or otherwise complying with the MATS requirements, such as retiring the Walter Scott, Jr. Energy Center Units 1 and 2 coal-fueled generating facilities and ceasing the utilization of coal at the Riverside Generating Station.

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Climate Change

GHG 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. As part of his Climate Action Plan, President Obama 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. The September 2013 GHG new source performance standards released by the EPA set different standards for coal-fueled and natural gas-fueled generating facilities. The proposed standard for natural gas-fueled generating facilities considered the size of the unit and the electricity sent to the grid from the unit. The proposed standards were published in the Federal Register January 8, 2014, and the public comment period closed in May 2014. On August 3, 2015, the EPA issued the final new source performance standards, establishing a standard of 1,000 pounds of carbon dioxide per MWh for large natural gas-fueled generating facilities and 1,400 pounds of carbon dioxide per MWh for new coal-fueled generating facilities with the "Best System of Emission Reduction" for coal-fueled generating facilities reflecting highly efficient supercritical pulverized coal facilities with partial carbon capture and sequestration or integrated gasification combined-cycle units that are co-fired with natural gas or pre-combustion slipstream capture of carbon dioxide. Any new fossil-fueled generating facilities constructed by MidAmerican Energy will be required to meet the GHG new source performance standards.

In June 2014, the EPA released proposed regulations to address GHG emissions from existing fossil-fueled generating facilities, referred to as the Clean Power Plan, under Section 111(d) of the Clean Air Act. The EPA's proposal calculated state-specific emission rate targets to be achieved based on four building blocks that it determined were the "Best System of Emission Reduction." The four building blocks include: (a) a 6% heat rate improvement from coal-fueled generating facilities; (b) increased utilization of existing combined-cycle natural gas-fueled generating facilities to 70%; (c) increased deployment of renewable and non-carbon generating resources; and (d) increased energy efficiency. Under this proposal, states could have utilized any measure to achieve the specified emission reduction goals, with an initial implementation period of 2020-2029 and the final goal to be achieved by 2030. When fully implemented, the proposal was expected to reduce carbon dioxide emissions in the power sector to 30% below 2005 levels by 2030. The final Clean Power Plan was released August 3, 2015 and changed the methodology upon which the Best System of Emission Reduction is based to include: (a) heat rate improvements; (b) increased utilization of existing combined-cycle natural gas-fueled generating facilities; and (c) increased deployment of new and incremental non-carbon generation placed in-service after 2012. The EPA also changed the compliance period to begin in 2022, with three interim periods of compliance and with the final goal to be achieved by 2030. Based on changes to the state emission reduction targets, which are now all between 771 pounds per MWh and 1,305 pounds per MWh, the Clean Power Plan, when fully implemented, is expected to reduce carbon dioxide emissions in the power sector to 32% below 2005 levels by 2030. The EPA also released on August 3, 2015, a draft federal plan as an option or backstop for states to utilize in the event they do not submit approvable state plans. The draft federal plan is expected to be open for a 90-day public comment period after publication in the Federal Register. States are required to submit initial implementation plans by September 2016, and may request an extension to September 2018. The impacts of the final rule or the federal plan on MidAmerican Energy cannot be determined until the states develop their implementation plans or the federal plan is finalized. MidAmerican Energy has historically pursued cost-effective projects, including plant efficiency improvements, increased diversification of its generating fleet to include deployment of renewable and lower carbon generating resources, and advancement of customer energy efficiency programs.

The GHG rules and MidAmerican Energy's compliance requirements are subject to potential outcomes from proceedings and litigation challenging the rules.

Coal Combustion Byproduct Disposal

In May 2010, the EPA released a proposed rule to regulate the management and disposal of coal combustion byproducts, presenting two alternatives to regulation under the Resource Conservation and Recovery Act ("RCRA"). The public comment period closed in November 2010. The final rule was released by the EPA on December 19, 2014, was published in the Federal Register on April 17, 2015 and will be effective on October 19, 2015. The final rule regulates coal combustion byproducts as non-hazardous waste under RCRA Subtitle D and establishes minimum nationwide standards for the disposal of coal combustion residuals. Under the final rule, surface impoundments and landfills utilized for coal combustion byproducts may need to be closed unless they can meet the more stringent regulatory requirements.

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As defined by the final rule, MidAmerican Energy owns or operates seven surface impoundments and four landfills that contain coal combustion byproducts. MidAmerican Energy continues to assess the requirements of the final rule to determine required compliance activities and the associated costs.

Collateral and Contingent Features

Debt 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 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, 2015, MidAmerican Energy's credit ratings for its senior secured debt and its issuer credit ratings for 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 their availability. 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 credit support provisions that in part base MidAmerican Energy's collateral requirements on its credit ratings for senior unsecured debt as reported by 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," or in some cases terminate the contract, 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, 2015, MidAmerican Energy would have been required to post $203 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 6 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 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, 2014. There have been no significant changes in MidAmerican Energy's and MidAmerican Funding's assumptions regarding critical accounting estimates since December 31, 2014.

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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, 2014. MidAmerican Energy's and MidAmerican Funding's exposure to market risk and their management of such risk has not changed materially since December 31, 2014. Refer to Note 6 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, 2015.

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, 2015, 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, 2014.

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 7, 2015	/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

15.1 Awareness Letter of Deloitte & Touche LLP

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, 2015, 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.

43

EX-15.1

EXHIBIT 15.1

August 7, 2015

To the Board of Directors and Shareholder of

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 interim financial information of MidAmerican Energy Company for the periods ended June 30, 2015 and 2014, as indicated in our report dated August 7, 2015; 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, 2015, is incorporated by reference in the Registration Statement No. 333-192077 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 7, 2015	/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 7, 2015	/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 7, 2015	/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 7, 2015	/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, 2015 (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 7, 2015	/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, 2015 (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 7, 2015	/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, 2015 (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 7, 2015	/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, 2015 (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 7, 2015	/s/ Thomas B. Specketer
	Thomas B. Specketer
	Vice President and Controller
	(principal financial officer)

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Segment Information (MEC) (Tables)

6 Months Ended

Jun. 30, 2015

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,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Total operating revenue	$	793	$	769		$	1,739	$	1,994
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Total operating income	$	122	$	51		$	228	$	204

	As of
	June 30, 2015		December 31, 2014
Total assets:
Regulated electric	$	12,220	$	11,859
Regulated gas	1,165		1,231
Nonregulated energy	174		167
Total assets	$	13,559	$	13,257

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Fair Value Measurements (MEC) Level 3 (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Commodity Derivative [Member]
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		$ 9	$ (2)	$ 12	$ (3)
Changes included in earnings	[1]	2	2	4	(4)
Changes in fair value recognized in OCI		(4)	1	(3)	4
Changes in fair value recognized in net regulatory assets		(15)	(4)	(15)	(1)
Purchases		1		1
Settlements		0	1	(6)	2
Ending balance		(7)	(2)	(7)	(2)
Net unrealized gains (losses) included in earnings		1	2	4	1
Auction rate securities [Member]
Fair Value, Assets and Liabilities, Net, Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		26	25	26	23
Changes included in earnings	[1]	0	0	0	0
Changes in fair value recognized in OCI		1	0	1	2
Changes in fair value recognized in net regulatory assets		0	0	0	0
Purchases		0		0
Settlements		0	0	0	0
Ending balance		$ 27	$ 25	$ 27	$ 25

[1] Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2015 and 2014, net unrealized gains included in earnings for the three-month periods ended June 30, 2015 and 2014, totaled $1 million and $2 million, respectively, and for the six-month periods ended June 30, 2015 and 2014, totaled $4 million and $1 million, respectively .

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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	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Regulatory Assets (Liabilities), Net, Derivatives [Roll Forward]
Beginning balance	$ 18	$ 32	$ 38	$ 10
Changes in fair value recognized in net regulatory assets	17	20	19	62
Net gains (losses) reclassified to operating revenue	(6)	(5)	(22)	(24)
Net gains (losses) reclassified to cost of gas sold	(1)	1	(7)	0
Ending balance	$ 28	$ 48	$ 28	$ 48

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Fair Value Measurements (MEC) Debt (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 4,065	$ 4,056
Long-term debt, fair value		$ 4,581
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 4,447

XML

Employee Benefit Plans (MEC) Narrative (Details) - MidAmerican Energy Company [Member] $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
United States Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions in current fiscal year	$ 8
Employer contributions in current year	4
United States Defined Benefit Other Postretirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated employer contributions in current fiscal year	1
Employer contributions in current year	$ 0

XML

Transfer of Nonregulated Energy Operations (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Property, Plant and Equipment Disclosure [Text Block]

(10) Transfer of Nonregulated Energy Operations

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

XML

Income Taxes (LLC) (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
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	(70.00%)	(79.00%)	(60.00%)	(58.00%)
State income tax, net of federal income tax benefit	(9.00%)	(5.00%)	(3.00%)	1.00%
Income tax method change	(0.00%)	(0.00%)	(0.00%)	(0.00%)
Effects of ratemaking	(13.00%)	(10.00%)	(11.00%)	(5.00%)
Other, net	(0.00%)	1.00%	(1.00%)	(1.00%)
Effective income tax rate	(57.00%)	(58.00%)	(40.00%)	(28.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for renewable energy production tax credit			10 years
Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related Party Transaction, Cash (Paid) Received for Income Taxes, Net			$ 374	$ 87

XML

New Accounting Pronouncements (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Accounting Changes [Text Block]

(2) New Accounting Pronouncements

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

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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	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive (Income) Loss, Net, Derivatives [Roll Forward]
Beginning balance	$ 30	$ (13)	$ 34	$ 11
Changes in fair value recognized in OCI	25	(21)	19	(79)
Net gains (losses) reclassified to nonregulated cost of sales	(16)	6	(14)	40
Ending balance	$ 39	$ (28)	39	(28)
Cash flow hedge ineffectiveness is immaterial	insignificant	insignificant
Gain (loss) on cash flow hedge ineffectiveness, net			1	$ 0
Cash flow hedge gain (loss) to be reclassified within twelve months			$ (22)

XML

Segment Information (LLC) (Tables)

6 Months Ended

Jun. 30, 2015

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,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Other	4		6			9		11
Total operating revenue	$	797	$	775		$	1,748	$	2,005
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Other	—		—			1		—
Total operating income	$	122	$	51		$	229	$	204

	As of
	June 30, 2015		December 31, 2014
Total assets(1):
Regulated electric	$	13,411	$	13,050
Regulated gas	1,244		1,310
Nonregulated energy	174		167
Other	16		17
Total assets	$	14,845	$	14,544

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

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

6 Months Ended

Jun. 30, 2015

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, 2015:
Not designated as hedging contracts(1):
Commodity assets	$	11		$	3	$	15		$	—		$	29
Commodity liabilities	(1		)	—		(51		)	(5		)	(57		)
Total	10			3		(36		)	(5		)	(28		)
Designated as hedging contracts:
Commodity assets	—			—		2			2			4
Commodity liabilities	—			—		(24		)	(20		)	(44		)
Total	—			—		(22		)	(18		)	(40		)
Total derivatives	10			3		(58		)	(23		)	(68		)
Cash collateral receivable	—			—		26			5			31
Total derivatives - net basis	$	10		$	3	$	(32	)	$	(18	)	$	(37	)

As of December 31, 2014:
Not designated as hedging contracts(1):
Commodity assets	$	14	$	3	$	19		$	1		$	37
Commodity liabilities	—		—		(69		)	(4		)	(73		)
Total	14		3		(50		)	(3		)	(36		)
Designated as hedging contracts:
Commodity assets	—		—		4			2			6
Commodity liabilities	—		—		(27		)	(17		)	(44		)
Total	—		—		(23		)	(15		)	(38		)
Total derivatives	14		3		(73		)	(18		)	(74		)
Cash collateral receivable	—		—		42			5			47
Total derivatives - net basis	$	14	$	3	$	(31	)	$	(13	)	$	(27	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2015 and December 31, 2014, a net regulatory asset of $28 million and $38 million, respectively, was recorded related to the net derivative liability of $28 million and $36 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,
	2015			2014			2015			2014
Beginning balance	$	18		$	32		$	38		$	10
Changes in fair value recognized in net regulatory assets	17			20			19			62
Net losses reclassified to operating revenue	(6		)	(5		)	(22		)	(24		)
Net (losses) gains reclassified to cost of gas sold	(1		)	1			(7		)	—
Ending balance	$	28		$	48		$	28		$	48

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 commodity 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,
	2015			2014		2015			2014
Nonregulated operating revenue	$	1		$	1	$	4		$	(8	)
Regulated cost of gas sold	1			—		2			—
Nonregulated cost of sales	(1		)	—		(5		)	21
Total	$	1		$	1	$	1		$	13

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 (income) 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,
	2015			2014			2015			2014
Beginning balance	$	30		$	(13	)	$	34		$	11
Changes in fair value recognized in OCI	25			(21		)	19			(79		)
Net (losses) gains reclassified to nonregulated cost of sales	(16		)	6			(14		)	40
Ending balance	$	39		$	(28	)	$	39		$	(28	)

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	2015	2014
Electricity purchases	Megawatt hours	16	14
Natural gas purchases	Decatherms	17	19

XML

Risk Management and Hedging Activities (MEC) Collateral and Contingent Features (Details) - MidAmerican Energy Company [Member] - Commodity Contract [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Derivative [Line Items]
Derivatives, net liability positions with specific credit-risk features, aggregate fair value	$ 60		$ 60		$ 52
Collateral already posted, aggregate fair value	0		0		0
Additional collateral, aggregate fair value	$ 52		52		$ 36
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Cash flow hedge ineffectiveness is immaterial	insignificant	insignificant
Gain (loss) on cash flow hedge ineffectiveness, net			$ 1	$ 0

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Risk Management and Hedging Activities (MEC) Balance Sheet Location (Details) - MidAmerican Energy Company [Member] - Commodity Contract [Member] - USD ($) $ in Millions		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net		$ (68)		$ (74)
Cash collateral, net receivable (payable), offset against derivatives		31		47
Total derivatives - net of collateral		(37)		(27)
Current Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net		10		14
Cash collateral, net receivable (payable), offset against derivatives		0		0
Total derivatives - net of collateral		10		14
Other Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net		3		3
Cash collateral, net receivable (payable), offset against derivatives		0		0
Total derivatives - net of collateral		3		3
Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net		(58)		(73)
Cash collateral, net receivable (payable), offset against derivatives		26		42
Total derivatives - net of collateral		(32)		(31)
Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Total derivative assets (liabilities), net		(23)		(18)
Cash collateral, net receivable (payable), offset against derivatives		5		5
Total derivatives - net of collateral		(18)		(13)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	[1]	29		37
Commodity liabilities	[1]	(57)		(73)
Total derivative assets (liabilities), net	[1]	(28)		(36)
Net regulatory asset		28	$ 18	38	$ 48	$ 32	$ 10
Not Designated as Hedging Instrument [Member] | Current Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	[1]	11		14
Commodity liabilities	[1]	(1)		0
Total derivative assets (liabilities), net	[1]	10		14
Not Designated as Hedging Instrument [Member] | Other Assets - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	[1]	3		3
Commodity liabilities	[1]	0		0
Total derivative assets (liabilities), net	[1]	3		3
Not Designated as Hedging Instrument [Member] | Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	[1]	15		19
Commodity liabilities	[1]	(51)		(69)
Total derivative assets (liabilities), net	[1]	(36)		(50)
Not Designated as Hedging Instrument [Member] | Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets	[1]	0		1
Commodity liabilities	[1]	(5)		(4)
Total derivative assets (liabilities), net	[1]	(5)		(3)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Commodity assets		4		6
Commodity liabilities		(44)		(44)
Total derivative assets (liabilities), net		(40)		(38)
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		0		0
Commodity liabilities		0		0
Total derivative assets (liabilities), net		0		0
Designated as Hedging Instrument [Member] | Current Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets		2		4
Commodity liabilities		(24)		(27)
Total derivative assets (liabilities), net		(22)		(23)
Designated as Hedging Instrument [Member] | Other Liabilities - Other [Member]
Derivatives, Fair Value [Line Items]
Commodity assets		2		2
Commodity liabilities		(20)		(17)
Total derivative assets (liabilities), net		$ (18)		$ (15)

[1] MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2015 and December 31, 2014, a net regulatory asset of $28 million and $38 million, respectively, was recorded related to the net derivative liability of $28 million and $36 million, respectively.

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Consolidated Statements of Operations (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenue:
Regulated electric	$ 461	$ 426	$ 887	$ 876
Regulated gas	110	136	405	647
Nonregulated	226	213	456	482
Total operating revenue	797	775	1,748	2,005
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	104	120	226	266
Cost of gas sold	55	83	256	492
Other operating expenses	119	123	236	232
Maintenance	51	77	100	121
Depreciation and amortization	99	85	199	170
Property and other taxes	30	29	63	61
Total regulated operating costs and expenses	458	517	1,080	1,342
Nonregulated operating costs and expenses:
Cost of sales	207	194	423	435
Other	10	13	16	24
Total nonregulated operating costs and expenses	217	207	439	459
Total operating costs and expenses	675	724	1,519	1,801
Operating income	122	51	229	204
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	6	10	11	19
Other, net	1	4	18	9
Total non-operating income	8	15	30	29
Fixed charges:
Interest on long-term debt	49	50	99	96
Other interest expense	1	1	1	1
Allowance for borrowed funds	(2)	(4)	(4)	(8)
Total fixed charges	48	47	96	89
Income before income tax benefit	82	19	163	144
Income tax benefit	(47)	(11)	(65)	(41)
Net income	$ 129	$ 30	$ 228	$ 185

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Components of Accumulated Other Comprehensive Income (Loss), Net (MEC) (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive income, unrealized gains on available-for-sales securities	$ 1	$ 0	$ 1	$ 1
Other comprehensive income (loss), unrealized gains on cash flow hedges	(6)	9	(4)	23
Other comprehensive income (loss)	(5)	9	(3)	24
Accumulated Other Comprehensive Income (Loss), Net [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance, Unrealized Losses on Available-For-Sale Securities			(3)	(4)
Beginning Balance, Unrealized (Losses) Gains on Cash Flow Hedges			(20)	(7)
Beginning Balance, Accumulated Other Comprehensive Income (Loss), Net			(23)	(11)
Other comprehensive income, unrealized gains on available-for-sales securities			1	1
Other comprehensive income (loss), unrealized gains on cash flow hedges			(4)	23
Other comprehensive income (loss)			(3)	24
Ending Balance, Unrealized Losses on Available-For-Sale Securities	(2)	(3)	(2)	(3)
Ending Balance, Unrealized (Losses) Gains on Cash Flow Hedges	(24)	16	(24)	16
Ending Balance, Accumulated Other Comprehensive Income (Loss), Net	$ (26)	$ 13	$ (26)	$ 13

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Risk Management and Hedging Activities (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Derivatives, Fair Value [Line Items]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(6) Risk Management and Hedging Activities

Refer to Note 6 of MidAmerican Energy's Notes to Financial Statements.

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Employee Benefit Plans (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Defined Benefit Plan Disclosure [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

(5) Employee Benefit Plans

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

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Segment Information (MEC) (Details) - MidAmerican Energy Company [Member] $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) ReportableSegments	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | ReportableSegments			3
Regulated electric	$ 461	$ 426	$ 887	$ 876
Regulated gas	110	136	405	647
Nonregulated energy	222	207	447	471
Total operating revenue	793	769	1,739	1,994
Depreciation and amortization	99	85	199	170
Total operating income	122	51	228	204
Assets	13,559		13,559		$ 13,257
Regulated electric [Member]
Segment Reporting Information [Line Items]
Regulated electric	461	426	887	876
Depreciation and amortization	89	76	179	151
Total operating income	108	48	161	131
Assets	12,220		12,220		11,859
Regulated gas [Member]
Segment Reporting Information [Line Items]
Regulated gas	110	136	405	647
Depreciation and amortization	10	9	20	19
Total operating income	4	(3)	51	55
Assets	1,165		1,165		1,231
Nonregulated energy [Member]
Segment Reporting Information [Line Items]
Nonregulated energy	222	207	447	471
Total operating income	10	$ 6	16	$ 18
Assets	$ 174		$ 174		$ 167

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Income Taxes (MEC) (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
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	(66.00%)	(62.00%)	(62.00%)	(55.00%)
State income tax, net of federal income tax benefit	(8.00%)	(3.00%)	(3.00%)	1.00%
Effects of ratemaking	(13.00%)	(8.00%)	(12.00%)	(5.00%)
Other, net	(0.00%)	(1.00%)	(0.00%)	(1.00%)
Effective income tax rate	(52.00%)	(39.00%)	(42.00%)	(25.00%)
Production Tax Credit Carryforwards [Abstract]
Years eligible for renewable energy production tax credit			10 years
Berkshire Hathaway Energy [Member]
Related Party Income Tax Receivable (Payable) [Abstract]
Related Party Transaction, Cash (Paid) Received for Income Taxes, Net			$ 373	$ 86

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Fair Value Measurements (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

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

Fair Value Disclosures [Text Block]

(7) Fair Value Measurements

Refer to Note 7 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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,390	$	4,886	$	4,381	$	5,012

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Commitments and Contingencies (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Notes to Consolidated Financial Statements [Line Items]

Commitments and Contingencies Disclosure [Text Block]

(8) 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 8 of MidAmerican Energy's Notes to Financial Statements.

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Consolidated Balance Sheets (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Utility plant, net:
Electric		$ 13,534	$ 13,426
Gas		1,462	1,432
Gross utility plant in service		14,996	14,858
Accumulated depreciation and amortization		(5,042)	(4,954)
Utility plant in service, net		9,954	9,904
Construction work in progress		893	606
Total utility plant, net		10,847	10,510
Current assets:
Cash and cash equivalents		303	30
Receivables, net		395	437
Income taxes receivable		0	303
Inventories		181	185
Other		81	87
Total current assets		960	1,042
Other assets:
Goodwill		1,270	1,270
Regulatory assets		959	908
Investments and nonregulated property, net		656	651
Other		153	163
Total other assets		3,038	2,992
Total assets	[1]	14,845	14,544
Capitalization:
MidAmerican Funding member's equity		5,298	5,073
Long-term debt, excluding current portion		3,959	3,955
Total capitalization		9,257	9,028
Current liabilities:
Short-term debt		0	50
Current portion of long-term debt		431	426
Note payable to affiliate		130	136
Accounts payable		373	392
Taxes accrued		136	128
Interest accrued		48	48
Other		161	131
Total current liabilities		1,279	1,311
Other liabilities:
Deferred income taxes		2,733	2,657
Asset retirement obligations		457	432
Regulatory liabilities		836	837
Other		283	279
Total other liabilities		4,309	4,205
Total capitalization and liabilities		$ 14,845	$ 14,544

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

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Segment Information (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

(9)    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,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Other	4		6			9		11
Total operating revenue	$	797	$	775		$	1,748	$	2,005
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Other	—		—			1		—
Total operating income	$	122	$	51		$	229	$	204

	As of
	June 30, 2015		December 31, 2014
Total assets(1):
Regulated electric	$	13,411	$	13,050
Regulated gas	1,244		1,310
Nonregulated energy	174		167
Other	16		17
Total assets	$	14,845	$	14,544

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

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Income Taxes (LLC) (Tables)

6 Months Ended

Jun. 30, 2015

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 MidAmerican Funding's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(70	)	(79	)	(60	)	(58	)
State income tax, net of federal income tax benefit	(9	)	(5	)	(3	)	1
Effects of ratemaking	(13	)	(10	)	(11	)	(5	)
Other, net	—		1		(1	)	(1	)
Effective income tax rate	(57	)%	(58	)%	(40	)%	(28	)%

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Fair Value Measurements (MEC) (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014
Commodity Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions		$ 31	$ 47
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure		760	467
Cash Collateral, Net Receivable (Payable), Offset Against Derivative Positions	[1]	31	47
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure		672	381
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure		68	62
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Assets, Fair Value Disclosure		40	50
Fair Value, Measurements, Recurring [Member] | Commodity Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		13	17
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	[1]	(20)	(26)
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(50)	(44)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	[1]	51	73
Fair Value, Measurements, Recurring [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		0	1
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(12)	(18)
Fair Value, Measurements, Recurring [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		20	18
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(69)	(87)
Fair Value, Measurements, Recurring [Member] | Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		13	24
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		(20)	(12)
Money market mutual funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure	[2]	292	1
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	[2]	292	1
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	[2]	0	0
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	[2]	0	0
United States government obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		131	136
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		131	136
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
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
International government obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		3	1
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
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		3	1
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
Corporate obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		40	39
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
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		40	39
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
Municipal obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		2	2
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
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	2
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
Agency, asset and mortgage-backed obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		3	2
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
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		3	2
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
Auction rate securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		27	26
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
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
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		27	26
United States equity securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		239	238
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		239	238
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
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
International equity securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Available-for-sale Securities, Fair Value Disclosure		6	5
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		6	5
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
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
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Trading securities, investment funds, fair value disclosure		4
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Trading securities, investment funds, fair value disclosure		4
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Trading securities, investment funds, fair value disclosure		0
Equity Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Trading securities, investment funds, fair value disclosure		$ 0

[1] Represents netting under master netting arrangements and a net cash collateral receivable of $31 million and $47 million as of June 30, 2015 and December 31, 2014, 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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Balance Sheets (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Utility plant, net:
Electric	$ 13,534	$ 13,426
Gas	1,462	1,432
Gross utility plant in service	14,996	14,858
Accumulated depreciation and amortization	(5,042)	(4,954)
Utility plant in service, net	9,954	9,904
Construction work in progress	893	606
Total utility plant, net	10,847	10,510
Current assets:
Cash and cash equivalents	302	29
Receivables, net	392	433
Income taxes receivable	0	307
Inventories	181	185
Other	84	87
Total current assets	959	1,041
Other assets:
Regulatory assets	959	908
Investments and nonregulated property, net	640	634
Other	154	164
Total other assets	1,753	1,706
Total assets	13,559	13,257
Capitalization:
MidAmerican Energy common shareholder's equity	4,472	4,250
Long-term debt, excluding current portion	3,634	3,630
Total capitalization	8,106	7,880
Current liabilities:
Short-term debt	0	50
Current portion of long-term debt	431	426
Accounts payable	373	392
Taxes accrued	133	128
Interest accrued	40	40
Other	162	131
Total current liabilities	1,139	1,167
Other liabilities:
Deferred income taxes	2,738	2,663
Asset retirement obligations	457	432
Regulatory liabilities	836	837
Other	283	278
Total other liabilities	4,314	4,210
Total capitalization and liabilities	$ 13,559	$ 13,257

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Employee Benefit Plans (MEC) (Details) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
United States Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3	$ 4	$ 6	$ 7
Interest cost	8	9	16	18
Expected return on plan assets	(12)	(12)	(23)	(23)
Net amortization	1	0	1	1
Net periodic benefit cost (benefit)	0	1	0	3
United States Defined Benefit Other Postretirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2	3	3
Interest cost	3	3	5	5
Expected return on plan assets	(3)	(4)	(7)	(7)
Net amortization	(1)	(1)	(2)	(2)
Net periodic benefit cost (benefit)	$ 0	$ 0	$ (1)	$ (1)

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Statements of Changes in Equity (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]
Balance at Dec. 31, 2013	$ 3,845	$ 561	$ 3,295	$ (11)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	189		189
Other comprehensive income (loss)	24			24
Balance at Jun. 30, 2014	4,058	561	3,484	13
Balance at Dec. 31, 2014	4,250	561	3,712	(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	225		225
Other comprehensive income (loss)	(3)			(3)
Balance at Jun. 30, 2015	$ 4,472	$ 561	$ 3,937	$ (26)

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Segment Information (LLC) (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) ReportableSegments	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | ReportableSegments				3
Regulated electric		$ 461	$ 426	$ 887	$ 876
Regulated gas		110	136	405	647
Nonregulated		226	213	456	482
Total operating revenue		797	775	1,748	2,005
Depreciation and amortization		99	85	199	170
Total operating income		122	51	229	204
Assets	[1]	14,845		14,845		$ 14,544
Regulated electric [Member]
Segment Reporting Information [Line Items]
Regulated electric		461	426	887	876
Depreciation and amortization		89	76	179	151
Total operating income		108	48	161	131
Assets	[1]	13,411		13,411		13,050
Regulated gas [Member]
Segment Reporting Information [Line Items]
Regulated gas		110	136	405	647
Depreciation and amortization		10	9	20	19
Total operating income		4	(3)	51	55
Assets	[1]	1,244		1,244		1,310
Nonregulated energy [Member]
Segment Reporting Information [Line Items]
Nonregulated		222	207	447	471
Total operating income		10	6	16	18
Assets	[1]	174		174		167
Other [Member]
Segment Reporting Information [Line Items]
Nonregulated		4	6	9	11
Total operating income		0	$ 0	1	$ 0
Assets	[1]	$ 16		$ 16		$ 17

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

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Income Taxes (MEC) (Tables)

6 Months Ended

Jun. 30, 2015

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 MidAmerican Energy's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(66	)	(62	)	(62	)	(55	)
State income tax, net of federal income tax benefit	(8	)	(3	)	(3	)	1
Effects of ratemaking	(13	)	(8	)	(12	)	(5	)
Other, net	—		(1	)	—		(1	)
Effective income tax rate	(52	)%	(39	)%	(42	)%	(25	)%

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Segment Information (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

(9) 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,
	2015		2014			2015		2014
Operating revenue:
Regulated electric	$	461	$	426		$	887	$	876
Regulated gas	110		136			405		647
Nonregulated energy	222		207			447		471
Total operating revenue	$	793	$	769		$	1,739	$	1,994
Depreciation and amortization:
Regulated electric	$	89	$	76		$	179	$	151
Regulated gas	10		9			20		19
Total depreciation and amortization	$	99	$	85		$	199	$	170
Operating income:
Regulated electric	$	108	$	48		$	161	$	131
Regulated gas	4		(3		)	51		55
Nonregulated energy	10		6			16		18
Total operating income	$	122	$	51		$	228	$	204

	As of
	June 30, 2015		December 31, 2014
Total assets:
Regulated electric	$	12,220	$	11,859
Regulated gas	1,165		1,231
Nonregulated energy	174		167
Total assets	$	13,559	$	13,257

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Employee Benefit Plans (MEC) (Tables)

6 Months Ended

Jun. 30, 2015

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,
	2015			2014			2015			2014
Pension:
Service cost	$	3		$	4		$	6		$	7
Interest cost	8			9			16			18
Expected return on plan assets	(12		)	(12		)	(23		)	(23		)
Net amortization	1			—			1			1
Net periodic benefit cost	$	—		$	1		$	—		$	3
Other postretirement:
Service cost	$	1		$	2		$	3		$	3
Interest cost	3			3			5			5
Expected return on plan assets	(3		)	(4		)	(7		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit cost (benefit)	$	—		$	—		$	(1	)	$	(1	)

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General (LLC)

6 Months Ended

Jun. 30, 2015

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 Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE 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 unaudited Consolidated Financial Statements as of June 30, 2015, and for the three- and six-month periods ended June 30, 2015 and 2014. The results of operations for the three- and six-month periods ended June 30, 2015, 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, 2014, 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, 2015.

Refer to Note 1 of MidAmerican Energy's Notes to Financial Statements.

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Statements of Cash Flows (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 225	$ 189
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	199	170
Deferred income taxes and amortization of investment tax credits	4	17
Changes in other assets and liabilities	24	22
Other, net	5	(29)
Changes in other operating assets and liabilities:
Receivables, net	40	(1)
Inventories	4	50
Derivative collateral, net	35	(47)
Pension and other postretirement benefit plans	(4)	(1)
Accounts payable	(103)	(22)
Taxes accrued, net	308	34
Other current assets and liabilities	16	18
Net cash flows from operating activities	753	400
Cash flows from investing activities:
Utility construction expenditures	(428)	(432)
Purchases of available-for-sale securities	(61)	(47)
Proceeds from sales of available-for-sale securities	56	44
Other, net	3	4
Net cash flows from investing activities	(430)	(431)
Cash flows from financing activities:
Proceeds from long-term debt	0	847
Repayments of long-term debt	0	(356)
Net proceeds from (repayments of) short-term debt	(50)	0
Other, net	0	(7)
Net cash flows from financing activities	(50)	484
Net change in cash and cash equivalents	273	453
Cash and cash equivalents at beginning of period	29	194
Cash and cash equivalents at end of period	$ 302	$ 647

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Statements of Operations (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenue:
Regulated electric	$ 461	$ 426	$ 887	$ 876
Regulated gas	110	136	405	647
Nonregulated	222	207	447	471
Total operating revenue	793	769	1,739	1,994
Regulated operating costs and expenses:
Cost of fuel, energy and capacity	104	120	226	266
Cost of gas sold	55	83	256	492
Other operating expenses	119	123	236	232
Maintenance	51	77	100	121
Depreciation and amortization	99	85	199	170
Property and other taxes	30	29	63	61
Total regulated operating costs and expenses	458	517	1,080	1,342
Nonregulated operating costs and expenses:
Cost of sales	204	194	416	435
Other	9	7	15	13
Total nonregulated operating costs and expenses	213	201	431	448
Total operating costs and expenses	671	718	1,511	1,790
Operating income	122	51	228	204
Non-operating income:
Interest income	1	1	1	1
Allowance for equity funds	6	10	11	19
Other, net	0	3	4	5
Total non-operating income	7	14	16	25
Fixed charges:
Interest on long-term debt	44	45	88	85
Other interest expense	1	1	1	1
Allowance for borrowed funds	(2)	(4)	(4)	(8)
Total fixed charges	43	42	85	78
Income before income tax benefit	86	23	159	151
Income tax benefit	(45)	(9)	(66)	(38)
Net income	$ 131	$ 32	$ 225	$ 189

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Income Taxes (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Income Taxes [Line Items]

Income Tax Disclosure [Text Block]

(4) Income Taxes

A reconciliation of the federal statutory income tax rate to MidAmerican Energy's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(66	)	(62	)	(62	)	(55	)
State income tax, net of federal income tax benefit	(8	)	(3	)	(3	)	1
Effects of ratemaking	(13	)	(8	)	(12	)	(5	)
Other, net	—		(1	)	—		(1	)
Effective income tax rate	(52	)%	(39	)%	(42	)%	(25	)%

Income tax credits relate primarily to production tax credits from 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 are placed in service.

Berkshire Hathaway includes BHE 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 BHE. MidAmerican Energy received net cash payments for income taxes from BHE totaling $373 million and $86 million for the six-month periods ended June 30, 2015 and 2014, respectively.

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Document and Entity Information Document - shares	6 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
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

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Employee Benefit Plans (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Defined Benefit Plan Disclosure [Line Items]

Pension and Other Postretirement Benefits Disclosure [Text Block]

(5) Employee Benefit Plans

MidAmerican Energy sponsors a noncontributory defined benefit pension plan covering a majority of all employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc. MidAmerican Energy also sponsors certain postretirement healthcare and life insurance benefits covering substantially all retired employees of BHE and its domestic energy subsidiaries other than PacifiCorp and NV Energy, Inc.

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,
	2015			2014			2015			2014
Pension:
Service cost	$	3		$	4		$	6		$	7
Interest cost	8			9			16			18
Expected return on plan assets	(12		)	(12		)	(23		)	(23		)
Net amortization	1			—			1			1
Net periodic benefit cost	$	—		$	1		$	—		$	3
Other postretirement:
Service cost	$	1		$	2		$	3		$	3
Interest cost	3			3			5			5
Expected return on plan assets	(3		)	(4		)	(7		)	(7		)
Net amortization	(1		)	(1		)	(2		)	(2		)
Net periodic benefit cost (benefit)	$	—		$	—		$	(1	)	$	(1	)

Employer contributions to the pension and other postretirement benefit plans are expected to be $8 million and $1 million, respectively, during 2015. As of June 30, 2015, $4 million and $- million of contributions had been made to the pension and other postretirement benefit plans, respectively.

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Statements of Comprehensive Income (MEC) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 131	$ 32	$ 225	$ 189
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $- and $1	1	0	1	1
Unrealized (losses) gains on cash flow hedges, net of tax of $(3), $6, $(1) and $16	(6)	9	(4)	23
Total other comprehensive income (loss), net of tax	(5)	9	(3)	24
Comprehensive income, net of tax	$ 126	$ 41	$ 222	$ 213

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Consolidated Statements of Changes in Equity (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	Total	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]
Balance at Dec. 31, 2013	$ 4,677	$ 1,679	$ 3,009	$ (11)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	185		185
Other comprehensive income (loss)	24			24
Balance at Jun. 30, 2014	4,885	1,679	3,193	13
Balance at Dec. 31, 2014	5,073	1,679	3,417	(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	228		228
Other comprehensive income (loss)	(3)			(3)
Balance at Jun. 30, 2015	$ 5,298	$ 1,679	$ 3,645	$ (26)

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Consolidated Statements of Comprehensive Income (LLC) (Parenthetical) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Unrealized gains on available-for-sale securities, tax	$ 0	$ 0	$ 0	$ 1
Unrealized gains (losses) on cash flow hedges, tax	$ (3)	$ 6	$ (1)	$ 16

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Transfer of Nonregulated Energy Operations (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Notes to Consolidated Financial Statements [Line Items]

Property, Plant and Equipment Disclosure [Text Block]

(10) Transfer of Nonregulated Energy Operations

In the second quarter of 2015, MidAmerican Energy filed with the Iowa Utilities Board and Illinois Commerce Commission for approval to transfer the operations, assets and liabilities of its unregulated retail services business to a subsidiary of BHE. The transfer, which would include substantially all of the net assets of MidAmerican Energy's nonregulated energy reportable segment, would be made at MidAmerican Energy’s carrying value of the assets and liabilities, resulting in no gain or loss. The transaction would be accounted for as a dividend and is expected to occur in the first quarter of 2016.

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Risk Management and Hedging Activities (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Derivatives, Fair Value [Line Items]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(6) 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, which creates contractual obligations to provide electric and natural gas services. 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 7 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, 2015:
Not designated as hedging contracts(1):
Commodity assets	$	11		$	3	$	15		$	—		$	29
Commodity liabilities	(1		)	—		(51		)	(5		)	(57		)
Total	10			3		(36		)	(5		)	(28		)
Designated as hedging contracts:
Commodity assets	—			—		2			2			4
Commodity liabilities	—			—		(24		)	(20		)	(44		)
Total	—			—		(22		)	(18		)	(40		)
Total derivatives	10			3		(58		)	(23		)	(68		)
Cash collateral receivable	—			—		26			5			31
Total derivatives - net basis	$	10		$	3	$	(32	)	$	(18	)	$	(37	)

As of December 31, 2014:
Not designated as hedging contracts(1):
Commodity assets	$	14	$	3	$	19		$	1		$	37
Commodity liabilities	—		—		(69		)	(4		)	(73		)
Total	14		3		(50		)	(3		)	(36		)
Designated as hedging contracts:
Commodity assets	—		—		4			2			6
Commodity liabilities	—		—		(27		)	(17		)	(44		)
Total	—		—		(23		)	(15		)	(38		)
Total derivatives	14		3		(73		)	(18		)	(74		)
Cash collateral receivable	—		—		42			5			47
Total derivatives - net basis	$	14	$	3	$	(31	)	$	(13	)	$	(27	)

(1) MidAmerican Energy's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of June 30, 2015 and December 31, 2014, a net regulatory asset of $28 million and $38 million, respectively, was recorded related to the net derivative liability of $28 million and $36 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,
	2015			2014			2015			2014
Beginning balance	$	18		$	32		$	38		$	10
Changes in fair value recognized in net regulatory assets	17			20			19			62
Net losses reclassified to operating revenue	(6		)	(5		)	(22		)	(24		)
Net (losses) gains reclassified to cost of gas sold	(1		)	1			(7		)	—
Ending balance	$	28		$	48		$	28		$	48

The following table summarizes the pre-tax gains (losses) included on the Statements of Operations associated with MidAmerican Energy's commodity 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,
	2015			2014		2015			2014
Nonregulated operating revenue	$	1		$	1	$	4		$	(8	)
Regulated cost of gas sold	1			—		2			—
Nonregulated cost of sales	(1		)	—		(5		)	21
Total	$	1		$	1	$	1		$	13

Designated as Hedging Contracts

MidAmerican Energy uses commodity 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 (income) 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,
	2015			2014			2015			2014
Beginning balance	$	30		$	(13	)	$	34		$	11
Changes in fair value recognized in OCI	25			(21		)	19			(79		)
Net (losses) gains reclassified to nonregulated cost of sales	(16		)	6			(14		)	40
Ending balance	$	39		$	(28	)	$	39		$	(28	)

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-month periods ended June 30, 2015 and 2014, hedge ineffectiveness was insignificant, and for the six-month periods ended June 30, 2015 and 2014, hedge ineffectiveness was a pre-tax gain of $1 million and $- million, respectively. As of June 30, 2015, MidAmerican Energy had cash flow hedges with expiration dates extending through December 2019, and $22 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	2015	2014
Electricity purchases	Megawatt hours	16	14
Natural gas purchases	Decatherms	17	19

Credit Risk

MidAmerican Energy is exposed to counterparty credit risk associated with wholesale energy supply and marketing activities with other utilities, energy marketing companies, financial institutions and other market participants. Credit risk may be concentrated to the extent MidAmerican Energy's counterparties have similar economic, industry or other characteristics and due to direct or indirect relationships among the counterparties. Before entering into a transaction, MidAmerican Energy analyzes the financial condition of each significant wholesale counterparty, 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 further mitigate wholesale counterparty credit risk, 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. If required, MidAmerican Energy exercises rights under these arrangements, including calling on the counterparty's credit support arrangement.

Collateral and Contingent Features

In accordance with industry practice, certain wholesale derivative contracts contain credit support provisions that in part base MidAmerican Energy's collateral requirements on its credit ratings for senior unsecured debt as reported by one or more of the three recognized credit rating agencies. 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," or in some cases terminate the contract, 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, 2015, 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 $60 million and $52 million as of June 30, 2015 and December 31, 2014, respectively, for which MidAmerican Energy had posted collateral of $- million at each date. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of June 30, 2015 and December 31, 2014, MidAmerican Energy would have been required to post $52 million and $36 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.

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New Accounting Pronouncements (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Notes to Financial Statements [Line Items]

Accounting Changes [Text Block]

(2) New Accounting Pronouncements

In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2015-03, which amends FASB Accounting Standards Codification ("ASC") Subtopic 835-30, "Interest - Imputation of Interest." The amendments in this guidance require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability instead of as an asset. This guidance is effective for interim and annual reporting periods beginning after December 15, 2015, with early adoption permitted. This guidance must be adopted retrospectively, wherein the balance sheet of each period presented should be adjusted to reflect the new guidance. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements and disclosures included within Notes to Financial Statements.

In May 2014, the FASB issued ASU No. 2014-09, which creates FASB ASC Topic 606, "Revenue from Contracts with Customers" and supersedes ASC Topic 605, "Revenue Recognition." The guidance replaces industry-specific guidance and establishes a single five-step model to identify and recognize revenue. The core principle of the guidance is that an entity should recognize revenue upon transfer of control of promised goods or services to customers in an amount that reflects the consideration to which an entity expects to be entitled in exchange for those goods or services. Additionally, the guidance requires the entity to disclose further quantitative and qualitative information regarding the nature and amount of revenues arising from contracts with customers, as well as other information about the significant judgments and estimates used in recognizing revenues from contracts with customers. In July 2015, the FASB decided to defer the effective date one year to interim and annual reporting periods beginning after December 15, 2017. This guidance may be adopted retrospectively or under a modified retrospective method where the cumulative effect is recognized at the date of initial application. MidAmerican Energy is currently evaluating the impact of adopting this guidance on its Financial Statements and disclosures included within Notes to Financial Statements.

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Consolidated Statements of Cash Flows (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 228	$ 185
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	199	170
Deferred income taxes and amortization of investment tax credits	4	16
Changes in other assets and liabilities	24	22
Other, net	(9)	(27)
Changes in other operating assets and liabilities:
Receivables, net	42	(1)
Inventories	4	50
Derivative collateral, net	35	(47)
Pension and other postretirement benefit plans	(4)	(1)
Accounts payable	(103)	(22)
Taxes accrued, net	310	33
Other current assets and liabilities	16	18
Net cash flows from operating activities	746	396
Cash flows from investing activities:
Utility construction expenditures	(428)	(432)
Purchases of available-for-sale securities	(61)	(47)
Proceeds from sales of available-for-sale securities	56	44
Proceeds from sales of investments	13	0
Other, net	3	6
Net cash flows from investing activities	(417)	(429)
Cash flows from financing activities:
Proceeds from long-term debt	0	847
Repayments of long-term debt	0	(356)
Net change in note payable to affiliate	(6)	2
Net proceeds from (repayments of) short-term debt	(50)	0
Other, net	0	(7)
Net cash flows from financing activities	(56)	486
Net change in cash and cash equivalents	273	453
Cash and cash equivalents at beginning of period	30	194
Cash and cash equivalents at end of period	$ 303	$ 647

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General (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Notes to 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 Berkshire Hathaway Energy Company ("BHE") as its sole member. BHE 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 unaudited Financial Statements as of June 30, 2015, and for the three- and six-month periods ended June 30, 2015 and 2014. The results of operations for the three- and six-month periods ended June 30, 2015, 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, 2014, 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, 2015.

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Components of Accumulated Other Comprehensive Income (Loss), Net (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Income (Loss), Net [Text Block]

(3) Components of Accumulated Other Comprehensive Income (Loss), Net

The following table shows the change in accumulated other comprehensive income (loss), net ("AOCI") by each component of other comprehensive income, net of applicable income taxes (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			(Losses) Gains			Other
	Available-For-Sale			on Cash Flow			Comprehensive
	Securities			Hedges			(Loss) Income, Net
Balance, December 31, 2013	$	(4	)	$	(7	)	$	(11	)
Other comprehensive income	1			23			24
Balance, June 30, 2014	$	(3	)	$	16		$	13
Balance, December 31, 2014	$	(3	)	$	(20	)	$	(23	)
Other comprehensive income (loss)	1			(4		)	(3		)
Balance, June 30, 2015	$	(2	)	$	(24	)	$	(26	)

For information regarding cash flow hedge reclassifications from AOCI to net income in their entirety, refer to Note 6.

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Components of Accumulated Other Comprehensive Income (Loss), Net (MEC) (Tables)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Income (Loss), Net [Table Text Block]

The following table shows the change in accumulated other comprehensive income (loss), net ("AOCI") by each component of other comprehensive income, net of applicable income taxes (in millions):

	Unrealized			Unrealized			Accumulated
	Losses on			(Losses) Gains			Other
	Available-For-Sale			on Cash Flow			Comprehensive
	Securities			Hedges			(Loss) Income, Net
Balance, December 31, 2013	$	(4	)	$	(7	)	$	(11	)
Other comprehensive income	1			23			24
Balance, June 30, 2014	$	(3	)	$	16		$	13
Balance, December 31, 2014	$	(3	)	$	(20	)	$	(23	)
Other comprehensive income (loss)	1			(4		)	(3		)
Balance, June 30, 2015	$	(2	)	$	(24	)	$	(26	)

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Risk Management and Hedging Activities (MEC) Derivative Contract Volumes (Details) - MidAmerican Energy Company [Member] - Commodity Contract [Member] MWh in Millions, Dth in Millions	Jun. 30, 2015 MWh Dth	Dec. 31, 2014 MWh Dth
Electricity purchases (in megawatt hours) [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount	16	14
Natural gas purchases (in decatherms) [Member]
Notional Amounts of Outstanding Derivative Positions [Line Items]
Derivative, Nonmonetary Notional Amount | Dth	17	19

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Commitments and Contingencies (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

Notes to Financial Statements [Line Items]

Commitments and Contingencies Disclosure [Text Block]

(8) 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.

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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Components of Accumulated Other Comprehensive Income (Loss), Net (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Accumulated Other Comprehensive Income (Loss) [Line Items]

Components of Accumulated Other Comprehensive Income (Loss), Net [Text Block]

(3) Components of Accumulated Other Comprehensive Income (Loss), Net

Refer to Note 3 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	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ 1	$ 1	$ 1	$ 13
Nonregulated operating revenue
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	1	1	4	(8)
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	1	0	2	0
Nonregulated cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$ (1)	$ 0	$ (5)	$ 21

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Fair Value Mearsurements (LLC) (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,390	$	4,886	$	4,381	$	5,012

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Statements of Comprehensive Income (MEC) (Parenthetical) - MidAmerican Energy Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Unrealized gains on available-for-sale securities, tax	$ 0	$ 0	$ 0	$ 1
Unrealized gains (losses) on cash flow hedges, tax	$ (3)	$ 6	$ (1)	$ 16

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Consolidated Statements of Comprehensive Income (LLC) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 129	$ 30	$ 228	$ 185
Other comprehensive income (loss), net of tax:
Unrealized gains on available-for-sale securities, net of tax of $-, $-, $- and $1	1	0	1	1
Unrealized (losses) gains on cash flow hedges, net of tax of $(3), $6, $(1) and $16	(6)	9	(4)	23
Total other comprehensive income (loss), net of tax	(5)	9	(3)	24
Comprehensive income, net of tax	$ 124	$ 39	$ 225	$ 209

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Fair Value Measurements (LLC) Debt (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, carrying value	$ 4,390	$ 4,381
Long-term debt, fair value		$ 5,012
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 4,886

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Income Taxes (LLC)

6 Months Ended

Jun. 30, 2015

MidAmerican Funding, LLC and Subsidiaries [Domain]

Income Taxes [Line Items]

Income Tax Disclosure [Text Block]

(4) Income Taxes

A reconciliation of the federal statutory income tax rate to MidAmerican Funding's 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,
	2015		2014		2015		2014
Federal statutory income tax rate	35	%	35	%	35	%	35	%
Income tax credits	(70	)	(79	)	(60	)	(58	)
State income tax, net of federal income tax benefit	(9	)	(5	)	(3	)	1
Effects of ratemaking	(13	)	(10	)	(11	)	(5	)
Other, net	—		1		(1	)	(1	)
Effective income tax rate	(57	)%	(58	)%	(40	)%	(28	)%

Income tax credits relate primarily to production tax credits from 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 are placed in service.

Berkshire Hathaway includes BHE 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 BHE. MidAmerican Funding received net cash payments for income taxes from BHE totaling $374 million and $87 million for the six-month periods ended June 30, 2015 and 2014, respectively.

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

6 Months Ended

Jun. 30, 2015

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, 2015:
Assets:
Commodity derivatives	$	—		$	20		$	13		$	(20	)	$	13
Money market mutual funds(2)	292			—			—			—			292
Debt securities:
United States government obligations	131			—			—			—			131
International government obligations	—			3			—			—			3
Corporate obligations	—			40			—			—			40
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			3			—			—			3
Auction rate securities	—			—			27			—			27
Equity securities:
United States companies	239			—			—			—			239
International companies	6			—			—			—			6
Investment funds	4			—			—			—			4
	$	672		$	68		$	40		$	(20	)	$	760
Liabilities - commodity derivatives	$	(12	)	$	(69	)	$	(20	)	$	51		$	(50	)

As of December 31, 2014:
Assets:
Commodity derivatives	$	1		$	18		$	24		$	(26	)	$	17
Money market mutual funds(2)	1			—			—			—			1
Debt securities:
United States government obligations	136			—			—			—			136
International government obligations	—			1			—			—			1
Corporate obligations	—			39			—			—			39
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			26			—			26
Equity securities:
United States companies	238			—			—			—			238
International companies	5			—			—			—			5
	$	381		$	62		$	50		$	(26	)	$	467
Liabilities - commodity derivatives	$	(18	)	$	(87	)	$	(12	)	$	73		$	(44	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $31 million and $47 million as of June 30, 2015 and December 31, 2014, 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
2015:
Beginning balance	$	9		$	26	$	12		$	26
Changes included in earnings(1)	2			—		4			—
Changes in fair value recognized in OCI	(4		)	1		(3		)	1
Changes in fair value recognized in net regulatory assets	(15		)	—		(15		)	—
Purchases	1			—		1			—
Settlements	—			—		(6		)	—
Ending balance	$	(7	)	$	27	$	(7	)	$	27
2014:
Beginning balance	$	(2	)	$	25	$	(3	)	$	23
Changes included in earnings(1)	2			—		(4		)	—
Changes in fair value recognized in OCI	1			—		4			2
Changes in fair value recognized in net regulatory assets	(4		)	—		(1		)	—
Settlements	1			—		2			—
Ending balance	$	(2	)	$	25	$	(2	)	$	25

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2015 and 2014, net unrealized gains included in earnings for the three-month periods ended June 30, 2015 and 2014, totaled $1 million and $2 million, respectively, and for the six-month periods ended June 30, 2015 and 2014, totaled $4 million and $1 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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,065	$	4,447	$	4,056	$	4,581

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Fair Value Measurements (MEC)

6 Months Ended

Jun. 30, 2015

MidAmerican Energy Company [Member]

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

Fair Value Disclosures [Text Block]

(7) 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, 2015:
Assets:
Commodity derivatives	$	—		$	20		$	13		$	(20	)	$	13
Money market mutual funds(2)	292			—			—			—			292
Debt securities:
United States government obligations	131			—			—			—			131
International government obligations	—			3			—			—			3
Corporate obligations	—			40			—			—			40
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			3			—			—			3
Auction rate securities	—			—			27			—			27
Equity securities:
United States companies	239			—			—			—			239
International companies	6			—			—			—			6
Investment funds	4			—			—			—			4
	$	672		$	68		$	40		$	(20	)	$	760
Liabilities - commodity derivatives	$	(12	)	$	(69	)	$	(20	)	$	51		$	(50	)

As of December 31, 2014:
Assets:
Commodity derivatives	$	1		$	18		$	24		$	(26	)	$	17
Money market mutual funds(2)	1			—			—			—			1
Debt securities:
United States government obligations	136			—			—			—			136
International government obligations	—			1			—			—			1
Corporate obligations	—			39			—			—			39
Municipal obligations	—			2			—			—			2
Agency, asset and mortgage-backed obligations	—			2			—			—			2
Auction rate securities	—			—			26			—			26
Equity securities:
United States companies	238			—			—			—			238
International companies	5			—			—			—			5
	$	381		$	62		$	50		$	(26	)	$	467
Liabilities - commodity derivatives	$	(18	)	$	(87	)	$	(12	)	$	73		$	(44	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $31 million and $47 million as of June 30, 2015 and December 31, 2014, 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 6 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 stated at fair value and are primarily accounted for as available-for-sale securities. 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
2015:
Beginning balance	$	9		$	26	$	12		$	26
Changes included in earnings(1)	2			—		4			—
Changes in fair value recognized in OCI	(4		)	1		(3		)	1
Changes in fair value recognized in net regulatory assets	(15		)	—		(15		)	—
Purchases	1			—		1			—
Settlements	—			—		(6		)	—
Ending balance	$	(7	)	$	27	$	(7	)	$	27
2014:
Beginning balance	$	(2	)	$	25	$	(3	)	$	23
Changes included in earnings(1)	2			—		(4		)	—
Changes in fair value recognized in OCI	1			—		4			2
Changes in fair value recognized in net regulatory assets	(4		)	—		(1		)	—
Settlements	1			—		2			—
Ending balance	$	(2	)	$	25	$	(2	)	$	25

(1) Changes included in earnings are reported as nonregulated operating revenue on the Statements of Operations. For commodity derivatives held as of June 30, 2015 and 2014, net unrealized gains included in earnings for the three-month periods ended June 30, 2015 and 2014, totaled $1 million and $2 million, respectively, and for the six-month periods ended June 30, 2015 and 2014, totaled $4 million and $1 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, 2015				As of December 31, 2014
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt	$	4,065	$	4,447	$	4,056	$	4,581