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 March 31, 2012

or

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

For the transition period from ______ to _______

Commission File Number	Exact name of registrant as specified in its charter; State or other jurisdiction of incorporation or organization	IRS Employer Identification No.
001-14881	MIDAMERICAN ENERGY HOLDINGS COMPANY	94-2213782
	(An Iowa Corporation)
	666 Grand Avenue, Suite 500
	Des Moines, Iowa 50309-2580
	515-242-4300
	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. Yes  x  No  o

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). Yes  x  No  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer o Accelerated filer o Non-accelerated filer x Smaller reporting company o

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

Yes  o  No  x

All of the shares of common equity of MidAmerican Energy Holdings Company are privately held by a limited group of investors. As of April 30, 2012, 74,609,001 shares of common stock were outstanding.

TABLE OF CONTENTS

PART I

Item 1.	Financial Statements	1
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	37
Item 4.	Controls and Procedures	37

PART II

Item 1.	Legal Proceedings	38
Item 1A.	Risk Factors	38
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	38
Item 3.	Defaults Upon Senior Securities	38
Item 4.	Mine Safety Disclosures	38
Item 5.	Other Information	38
Item 6.	Exhibits	38
Signatures		39
Exhibit Index		40

i

Definition of Abbreviations and Industry Terms

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

MidAmerican Energy Holdings Company and Related Entities
MEHC	MidAmerican Energy Holdings Company
Company	MidAmerican Energy Holdings Company and its subsidiaries
PacifiCorp	PacifiCorp and its subsidiaries
MidAmerican Funding	MidAmerican Funding, LLC
MidAmerican Energy	MidAmerican Energy Company
Northern Natural Gas	Northern Natural Gas Company
Kern River	Kern River Gas Transmission Company
Northern Powergrid Holdings	Northern Powergrid Holdings Company
MidAmerican Energy Pipeline Group	Consists of Northern Natural Gas and Kern River
MidAmerican Renewables	Consists of MidAmerican Renewables, LLC and CalEnergy Philippines
CE Casecnan	CE Casecnan Water and Energy Company, Inc.
HomeServices	HomeServices of America, Inc. and its subsidiaries
ETT	Electric Transmission Texas, LLC
Utilities	PacifiCorp and MidAmerican Energy Company
Domestic Regulated Businesses	PacifiCorp, MidAmerican Energy Company, Northern Natural Gas Company and Kern River Gas Transmission Company
Berkshire Hathaway	Berkshire Hathaway Inc. and its subsidiaries
Topaz	Topaz Solar Farms LLC
Topaz Project	Topaz Solar Farms LLC's 550-megawatt solar project
Agua Caliente	Agua Caliente Solar, LLC
Agua Caliente Project	Agua Caliente Solar, LLC's 290-megawatt solar project
Bishop Hill	Bishop Hill Energy II, LLC
Bishop Hill Project	Bishop Hill Energy II, LLC's 81-MW wind-powered generating project
Certain Industry Terms
AFUDC	Allowance for Funds Used During Construction
Dodd-Frank Reform Act	Dodd-Frank Wall Street Reform and Consumer Protection Act
EPA	United States Environmental Protection Agency
ERCOT	Electric Reliability Council of Texas
FERC	Federal Energy Regulatory Commission
GHG	Greenhouse Gases
IPUC	Idaho Public Utilities Commission
IUB	Iowa Utilities Board
kV	Kilovolt
MW	Megawatts
OPUC	Oregon Public Utility Commission
REC	Renewable Energy Credit
RPS	Renewable Portfolio Standards
RTO	Regional Transmission Organization
UPSC	Utah Public Service Commission
WPSC	Wyoming Public Service Commission
WUTC	Washington Utilities and Transportation Commission

ii

Forward-Looking Statements

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

• general economic, political and business conditions, as well as changes in laws and regulations affecting the Company'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 general rate cases and other proceedings conducted by regulatory commissions or other governmental and legal bodies and the Company's ability to recover costs in rates in a timely manner;

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

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

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

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

• the financial condition and creditworthiness of the Company'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 MEHC's and its subsidiaries' credit facilities;

• changes in MEHC's and its subsidiaries' credit ratings;

• risks relating to nuclear generation;

• the impact of derivative 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 derivative contracts;

• the impact of inflation on costs and our ability to recover such costs in regulated rates;

• increases in employee healthcare costs;

• 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;

• changes in the residential real estate brokerage and mortgage industries and regulations that could affect brokerage and mortgage transaction levels;

• 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 availability and price of natural gas in applicable geographic regions;

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

• the Company's ability to successfully integrate future acquired operations into its business;

iii

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

• other business or investment considerations that may be disclosed from time to time in MEHC'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 the Company are described in MEHC's filings with the United States Securities and Exchange Commission, including Part II, Item 1A and other discussions contained in this Form 10-Q. The Company undertakes 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.

iv

PART I

Item 1. Financial Statements

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

MidAmerican Energy Holdings Company

Des Moines, Iowa

We have reviewed the accompanying consolidated balance sheet of MidAmerican Energy Holdings Company and subsidiaries (the "Company") as of March 31, 2012, and the related consolidated statements of operations, comprehensive income, changes in equity, and cash flows for the three-month periods ended March 31, 2012 and 2011. 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 of MidAmerican Energy Holdings Company and subsidiaries as of December 31, 2011, and the related consolidated statements of operations, cash flows, changes in equity, and comprehensive income for the year then ended (not presented herein); and in our report dated February 27, 2012, 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, 2011 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

May 4, 2012

1

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (Unaudited)

(Amounts in millions)

	As of
	March 31,		December 31,
	2012		2011
ASSETS
Current assets:
Cash and cash equivalents	$	382	$	286
Trade receivables, net	1,186		1,270
Income taxes receivable	552		456
Inventories	694		690
Other current assets	645		581
Total current assets	3,459		3,283
Property, plant and equipment, net	34,828		34,167
Goodwill	5,039		4,996
Investments and restricted cash and investments	2,676		1,948
Regulatory assets	2,841		2,835
Other assets	524		489
Total assets	$	49,367	$	47,718

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

2

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (Unaudited) (continued)

(Amounts in millions)

	As of
	March 31,			December 31,
	2012			2011
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	874		$	989
Accrued employee expenses	223			155
Accrued interest	327			326
Accrued property, income and other taxes	365			340
Derivative contracts	263			160
Short-term debt	98			865
Current portion of long-term debt	1,456			1,198
Other current liabilities	549			514
Total current liabilities	4,155			4,547
Regulatory liabilities	1,696			1,663
MEHC senior debt	4,621			4,621
Subsidiary debt	14,523			13,253
Deferred income taxes	7,272			7,076
Other long-term liabilities	2,310			2,293
Total liabilities	34,577			33,453
Commitments and contingencies (Note 10)
Equity:
MEHC shareholders' equity:
Common stock - 115 shares authorized, no par value, 75 shares issued and outstanding	—			—
Additional paid-in capital	5,423			5,423
Retained earnings	9,685			9,310
Accumulated other comprehensive loss, net	(487		)	(641		)
Total MEHC shareholders' equity	14,621			14,092
Noncontrolling interests	169			173
Total equity	14,790			14,265
Total liabilities and equity	$	49,367		$	47,718

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

3

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

(Amounts in millions)

	Three-Month Periods
	Ended March 31,
	2012			2011
Operating revenue:
Energy	$	2,638		$	2,655
Real estate	209			189
Total operating revenue	2,847			2,844
Operating costs and expenses:
Energy:
Cost of sales	942			972
Operating expense	626			635
Depreciation and amortization	348			332
Real estate	215			201
Total operating costs and expenses	2,131			2,140
Operating income	716			704
Other income (expense):
Interest expense	(290		)	(303		)
Capitalized interest	9			9
Interest and dividend income	3			3
Other, net	33			26
Total other income (expense)	(245		)	(265		)
Income before income tax expense and equity income	471			439
Income tax expense	104			111
Equity income	12			7
Net income	379			335
Net income attributable to noncontrolling interests	4			4
Net income attributable to MEHC	$	375		$	331

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

4

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited)

(Amounts in millions)

	Three-Month Periods
	Ended March 31,
	2012			2011
Net income	$	379		$	335
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax of $(2) and $(2)	(5		)	(5		)
Foreign currency translation adjustment	85			76
Unrealized gains (losses) on available-for-sale securities, net of tax of $59 and $(127)	89			(189		)
Unrealized (losses) gains on cash flow hedges, net of tax of $(11) and $1	(15		)	1
Total other comprehensive income (loss), net of tax	154			(117		)
Comprehensive income	533			218
Comprehensive income attributable to noncontrolling interests	4			4
Comprehensive income attributable to MEHC	$	529		$	214

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

5

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited)

 (Amounts in millions)

	MEHC Shareholders' Equity
									Accumulated
				Additional					Other
	Common			Paid-in			Retained		Comprehensive			Noncontrolling			Total
	Shares	Stock		Capital			Earnings		Loss, Net			Interests			Equity
Balance at December 31, 2010	75	$	—	$	5,427		$	7,979	$	(174	)	$	176		$	13,408
Net income	—	—		—			331		—			4			335
Other comprehensive loss	—	—		—			—		(117		)	—			(117		)
Distributions	—	—		—			—		—			(6		)	(6		)
Other equity transactions	—	—		(3		)	—		—			—			(3		)
Balance at March 31, 2011	75	$	—	$	5,424		$	8,310	$	(291	)	$	174		$	13,617
Balance at December 31, 2011	75	$	—	$	5,423		$	9,310	$	(641	)	$	173		$	14,265
Net income	—	—		—			375		—			4			379
Other comprehensive income	—	—		—			—		154			—			154
Distributions	—	—		—			—		—			(8		)	(8		)
Balance at March 31, 2012	75	$	—	$	5,423		$	9,685	$	(487	)	$	169		$	14,790

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

6

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(Amounts in millions)

	Three-Month Periods
	Ended March 31,
	2012			2011
Cash flows from operating activities:
Net income	$	379		$	335
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	351			335
Changes in regulatory assets and liabilities	5			(4		)
Deferred income taxes and amortization of investment tax credits	176			60
Other, net	(19		)	(3		)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	127			88
Derivative collateral, net	93			32
Contributions to pension and other postretirement benefit plans, net	(14		)	(35		)
Accrued property, income and other taxes	(96		)	49
Accounts payable and other liabilities	(70		)	(40		)
Net cash flows from operating activities	932			817
Cash flows from investing activities:
Capital expenditures	(756		)	(551		)
Acquisitions, net of cash acquired	(109		)	—
Purchases of available-for-sale securities	(50		)	(69		)
Proceeds from sales of available-for-sale securities	46			73
Equity method investments	(163		)	(11		)
Increase in restricted cash and investments	(448		)	(8		)
Other, net	9			6
Net cash flows from investing activities	(1,471		)	(560		)
Cash flows from financing activities:
Proceeds from subsidiary debt	1,599			191
Repayments of subsidiary debt	(114		)	(224		)
Repayment of MEHC subordinated debt	(22		)	—
Net (repayments of) proceeds from short-term debt	(795		)	217
Other, net	(34		)	(11		)
Net cash flows from financing activities	634			173
Effect of exchange rate changes	1			(1		)
Net change in cash and cash equivalents	96			429
Cash and cash equivalents at beginning of period	286			470
Cash and cash equivalents at end of period	$	382		$	899

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

7

MIDAMERICAN ENERGY HOLDINGS COMPANY AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(1) General

MidAmerican Energy Holdings Company ("MEHC") is a holding company that owns subsidiaries principally engaged in energy businesses (collectively with its subsidiaries, the "Company"). MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").

The Company's operations are organized and managed as eight distinct platforms: PacifiCorp, MidAmerican Funding, LLC ("MidAmerican Funding") (which primarily consists of MidAmerican Energy Company ("MidAmerican Energy")), Northern Natural Gas Company ("Northern Natural Gas"), Kern River Gas Transmission Company ("Kern River"), Northern Powergrid Holdings Company ("Northern Powergrid Holdings") (which primarily consists of Northern Powergrid (Northeast) Limited and Northern Powergrid (Yorkshire) plc), CalEnergy Philippines (which owns a majority interest in the Casecnan project in the Philippines), MidAmerican Renewables, LLC (which owns interests in independent power projects in the United States), and HomeServices of America, Inc. (collectively with its subsidiaries, "HomeServices"). Through these platforms, the Company owns and operates an electric utility company in the Western United States, an electric and natural gas utility company in the Midwestern United States, two interstate natural gas pipeline companies in the United States, two electricity distribution companies in Great Britain, a diversified portfolio of independent power projects and the second largest residential real estate brokerage firm in the United States. Northern Natural Gas and Kern River have been aggregated in the reportable segment called MidAmerican Energy Pipeline Group, and CalEnergy Philippines and MidAmerican Renewables, LLC have been aggregated in the reportable segment called MidAmerican Renewables.

The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Consolidated Financial Statements as of March 31, 2012 and for the three-month periods endedMarch 31, 2012 and 2011. The results of operations for the three-month period endedMarch 31, 2012 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 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 the Company's Annual Report on Form 10-K for the year ended December 31, 2011 describes the most significant accounting policies used in the preparation of the Consolidated Financial Statements. There have been no significant changes in the Company's assumptions regarding significant accounting estimates and policies during the three-month period endedMarch 31, 2012.

(2) New Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-11, which amends FASB Accounting Standards Codification ("ASC") Topic 210, "Balance Sheet." The amendments in this guidance require an entity to provide quantitative disclosures about offsetting financial instruments and derivative instruments. Additionally, this guidance requires qualitative and quantitative disclosures about master netting agreements or similar agreements when the financial instruments and derivative instruments are not offset. This guidance is effective for fiscal years beginning on or after January 1, 2013, and for interim periods within those fiscal years. The Company is currently evaluating the impact of adopting this guidance on its disclosures included within Notes to Consolidated Financial Statements.

8

In June 2011, the FASB issued ASU No. 2011-05, which amends FASB ASC Topic 220, "Comprehensive Income." ASU No. 2011-05 provides an entity with the option to present the total of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. Regardless of the option chosen, this guidance also requires presentation of items on the face of the financial statements that are reclassified from other comprehensive income to net income. This guidance does not change the items that must be reported in other comprehensive income, when an item of other comprehensive income must be reclassified to net income or how tax effects of each item of other comprehensive income are presented. This guidance is effective for interim and annual reporting periods beginning after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which also amends FASB ASC Topic 220 to defer indefinitely the ASU No. 2011-05 requirement to present items on the face of the financial statements that are reclassified from other comprehensive income to net income. ASU No. 2011-12 is also effective for interim and annual reporting periods beginning after December 15, 2011. The Company adopted this guidance on January 1, 2012 and elected the two separate but consecutive statements option.

In May 2011, the FASB issued ASU No. 2011-04, which amends FASB ASC Topic 820, "Fair Value Measurements and Disclosures." The amendments in this guidance are not intended to result in a change in current accounting. ASU No. 2011-04 requires additional disclosures relating to fair value measurements categorized within Level 3 of the fair value hierarchy, including quantitative information about unobservable inputs, the valuation process used by the entity and the sensitivity of unobservable input measurements. Additionally, entities are required to disclose the level of the fair value hierarchy for assets and liabilities that are not measured at fair value in the balance sheet, but for which disclosure of the fair value is required. This guidance is effective for interim and annual reporting periods beginning after December 15, 2011. The Company adopted ASU No. 2011-04 on January 1, 2012. The adoption of this guidance did not have a material impact on the Company's disclosures included within Notes to Consolidated Financial Statements.

(3) Property, Plant and Equipment, Net

Property, plant and equipment, net consists of the following (in millions):

		As of
	Depreciable	March 31,			December 31,
	Life	2012			2011
Regulated assets:
Utility generation, distribution and transmission system	5-80 years	$	40,608		$	40,180
Interstate pipeline assets	3-80 years	6,253			6,245
		46,861			46,425
Accumulated depreciation and amortization		(14,643		)	(14,390		)
Regulated assets, net		32,218			32,035
Nonregulated assets:
Independent power plants	5-30 years	677			677
Other assets	3-30 years	437			429
		1,114			1,106
Accumulated depreciation and amortization		(549		)	(533		)
Nonregulated assets, net		565			573
Net operating assets		32,783			32,608
Construction work-in-progress		2,045			1,559
Property, plant and equipment, net		$	34,828		$	34,167

Construction work-in-progress includes $1.8 billion and $1.6 billion as of March 31, 2012 and December 31, 2011, respectively, related to the construction of regulated assets.

9

The Company completed various acquisitions totaling $109 million during the three-month period ended March 31, 2012. The purchase price for each acquisition was allocated to the assets acquired, which relate primarily to development and construction costs for the 550-megawatt Topaz solar project ("Topaz Project") and the 81-megawatt Bishop Hill II wind-powered generation project. There were no material liabilities assumed.

(4) Fair Value Measurements

The carrying value of the Company'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. The Company has various financial assets and liabilities that are measured at fair value on the Consolidated 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 the Company 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 the Company's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Company develops these inputs based on the best information available, including its own data.

The following table presents the Company's assets and liabilities recognized on the Consolidated 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 March 31, 2012
Assets:
Commodity derivatives	$	3		$	183		$	32		$	(164	)	$	54
Money market mutual funds(2)	657			—			—			—			657
Debt securities:
United States government obligations	90			—			—			—			90
International government obligations	—			1			—			—			1
Corporate obligations	—			31			—			—			31
Municipal obligations	—			11			—			—			11
Agency, asset and mortgage-backed obligations	—			7			—			—			7
Auction rate securities	—			—			36			—			36
Equity securities:
United States companies	186			—			—			—			186
International companies	631			—			—			—			631
Investment funds	68			—			—			—			68
	$	1,635		$	233		$	68		$	(164	)	$	1,772
Liabilities - commodity derivatives	$	(31	)	$	(664	)	$	(7	)	$	230		$	(472	)

10

	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other(1)			Total
As of December 31, 2011
Assets:
Commodity derivatives	$	1		$	166		$	27		$	(147	)	$	47
Money market mutual funds(2)	164			—			—			—			164
Debt securities:
United States government obligations	89			—			—			—			89
International government obligations	—			1			—			—			1
Corporate obligations	—			30			—			—			30
Municipal obligations	—			12			—			—			12
Agency, asset and mortgage-backed obligations	—			7			—			—			7
Auction rate securities	—			—			35			—			35
Equity securities:
United States companies	166			—			—			—			166
International companies	489			—			—			—			489
Investment funds	64			—			—			—			64
	$	973		$	216		$	62		$	(147	)	$	1,104
Liabilities - commodity derivatives	$	(37	)	$	(598	)	$	(4	)	$	303		$	(336	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $66 million and $156 million as of March 31, 2012 and December 31, 2011, respectively.

(2) Amounts are included in cash and cash equivalents; current investments and restricted cash and investments; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at 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 the Company transacts. When quoted prices for identical contracts are not available, the Company uses forward price curves. Forward price curves represent the Company's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. The Company 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 the Company. Market price quotations for certain major electricity and natural gas trading hubs are generally readily obtainable for the applicable term of the Company's outstanding derivative contracts; therefore, the Company's forward price curves for those locations and periods reflect observable market quotes. Market price quotations for other 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, the Company 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, currency rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 5 for further discussion regarding the Company's risk management and hedging activities.

The Company's investments in money market mutual funds and debt and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. The fair value of the Company'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 the Company's judgment about the assumptions, including liquidity and nonperformance risks, which market participants would use when pricing the asset.

11

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

	Three-Month Period
	Ended March 31,
	Commodity			Auction Rate
	Derivatives			Securities
2012
Beginning balance	$	23		$	35
Changes included in earnings(1)	10			—
Changes in fair value recognized in other comprehensive income	(3		)	2
Changes in fair value recognized in net regulatory assets	9			—
Sales	—			(1		)
Settlements	(14		)	—
Ending balance	$	25		$	36

2011
Beginning balance	$	(331	)	$	50
Changes included in earnings(1)	2			—
Changes in fair value recognized in other comprehensive income	—			2
Changes in fair value recognized in net regulatory assets	(13		)	—
Sales	—			(13		)
Settlements	1			—
Ending balance	$	(341	)	$	39

(1) Changes included in earnings are reported as operating revenue on the Consolidated Statements of Operations. For commodity derivatives held as of March 31, 2012 and 2011, net unrealized gains (losses) included in earnings for the three-month periods endedMarch 31, 2012 and 2011 totaled $7 million and $(1) million, respectively.

The Company's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of the Company'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 the Company'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 the Company's long-term debt (in millions):

	As of March 31, 2012				As of December 31, 2011
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value
Long-term debt	$	20,600	$	23,791	$	19,072	$	23,327

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(5) Risk Management and Hedging Activities

The Company is exposed to the impact of market fluctuations in commodity prices, interest rates and foreign currency exchange rates. The Company is principally exposed to electricity, natural gas, coal and fuel oil commodity price risk primarily through MEHC's ownership of the Utilities as they have an obligation to serve retail customer load in their regulated service territories. MidAmerican Energy also provides nonregulated retail electricity and natural gas services in competitive markets. The Utilities' 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. Additionally, the Company is exposed to foreign currency exchange rate risk from its business operations and investments in Great Britain. The Company does not engage in a material amount of proprietary trading activities.

Each of the Company's business platforms 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, the Company 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. The Company 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, the Company may from time to time enter into interest rate derivative contracts, such as interest rate swaps or locks, to mitigate the Company's exposure to interest rate risk. The Company does not hedge all of its commodity price, interest rate and foreign currency exchange rate risks, thereby exposing the unhedged portion to changes in market prices.

There have been no significant changes in the Company's accounting policies related to derivatives. Refer to Note 4 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 the Company's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

							Derivative
	Other						Contracts -			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total
As of March 31, 2012
Not designated as hedging contracts(1):
Commodity assets	$	104		$	8		$	88		$	14		$	214
Commodity liabilities	(50		)	(3		)	(363		)	(212		)	(628		)
Total	54			5			(275		)	(198		)	(414		)
Designated as hedging contracts:
Commodity assets	—			—			1			3			4
Commodity liabilities	(2		)	—			(49		)	(23		)	(74		)
Total	(2		)	—			(48		)	(20		)	(70		)
Total derivatives	52			5			(323		)	(218		)	(484		)
Cash collateral (payable) receivable	(3		)	—			60			9			66
Total derivatives - net basis	$	49		$	5		$	(263	)	$	(209	)	$	(418	)

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							Derivative
	Other						Contracts -			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total
As of December 31, 2011
Not designated as hedging contracts(1):
Commodity assets	$	93		$	14		$	73		$	13		$	193
Commodity liabilities	(47		)	(5		)	(324		)	(216		)	(592		)
Total	46			9			(251		)	(203		)	(399		)
Designated as hedging contracts:
Commodity assets	—			—			1			—			1
Commodity liabilities	(6		)	—			(24		)	(17		)	(47		)
Total	(6		)	—			(23		)	(17		)	(46		)
Total derivatives	40			9			(274		)	(220		)	(445		)
Cash collateral (payable) receivable	(2		)	—			114			44			156
Total derivatives - net basis	$	38		$	9		$	(160	)	$	(176	)	$	(289	)

(1) The Company's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of March 31, 2012 and December 31, 2011, a net regulatory asset of $415 million and $400 million, respectively, was recorded related to the net derivative liability of $414 million and $399 million, respectively.

Not Designated as Hedging Contracts

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

	Three-Month Periods
	Ended March 31,
	2012			2011
Beginning balance	$	400		$	564
Changes in fair value recognized in net regulatory assets	70			(22		)
Net gains reclassified to operating revenue	29			8
Net losses reclassified to cost of sales	(84		)	(7		)
Ending balance	$	415		$	543

Designated as Hedging Contracts

The Company uses derivative contracts accounted for as cash flow hedges to hedge electricity and natural gas commodity prices for delivery to nonregulated customers, spring operational sales, natural gas storage and other transactions.

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

	Three-Month Periods
	Ended March 31,
	2012			2011
Beginning balance(1)	$	46		$	37
Changes in fair value recognized in OCI	38			2
Net losses reclassified to cost of sales	(13		)	(5		)
Ending balance(1)	$	71		$	34

(1) Certain derivative contracts, principally interest rate locks, have settled and the fair value at the date of settlement remains in accumulated other comprehensive income ("AOCI") and is recognized in earnings when the forecasted transactions impact earnings.

Realized gains and losses on hedges and hedge ineffectiveness are recognized in income as operating revenue, cost of sales, operating expense or interest expense depending upon the nature of the item being hedged. For the three-month periods endedMarch 31, 2012 and 2011, hedge ineffectiveness was insignificant. As of March 31, 2012, the Company had cash flow hedges with expiration dates extending through December 2016 and $46 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	March 31,	December 31,
	Measure	2012	2011
Electricity purchases	Megawatt hours	10	6
Natural gas purchases	Decatherms	152	183
Fuel purchases	Gallons	14	19

Credit Risk

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

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

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

Collateral and Contingent Features

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

The aggregate fair value of the Company's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $620 million and $571 million as of March 31, 2012 and December 31, 2011, respectively, for which the Company had posted collateral of $176 million and $125 million, respectively, in the form of cash deposits and letters of credit. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of March 31, 2012 and December 31, 2011, the Company would have been required to post $259 million and $332 million, respectively, of additional collateral. The Company'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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(6) Investments and Restricted Cash and Investments

Investments and restricted cash and investments consists of the following (in millions):

	As of
	March 31,			December 31,
	2012			2011
Investments:
BYD common stock	$	629		$	488
Rabbi trusts	304			290
Other	100			99
Total investments	1,033			877
Equity method investments:
CE Generation, LLC	253			255
Electric Transmission Texas, LLC	251			221
Bridger Coal Company	195			204
Agua Caliente Solar, LLC	95			—
Other	56			52
Total equity method investments	850			732
Restricted cash and investments:
Nuclear decommissioning trust funds	329			308
Other	530			82
Total restricted cash and investments	859			390
Total investments and restricted cash and investments	2,742			1,999
Less current portion	(66		)	(51		)
Noncurrent portion	$	2,676		$	1,948

Investments

MEHC's investment in BYD Company Limited common stock is accounted for as an available-for-sale security with changes in fair value recognized in AOCI. As of March 31, 2012 and December 31, 2011, the fair value of MEHC's investment in BYD Company Limited common stock was $629 million and $488 million, respectively, which resulted in a pre-tax unrealized gain of $397 million and $256 million as of March 31, 2012 and December 31, 2011, respectively.

Equity Method Investments

In January 2012, MEHC, through a wholly-owned subsidiary, acquired from NRG Energy, Inc. a 49% equity interest in Agua Caliente Solar, LLC ("Agua Caliente"), the owner of a 290-megawatt solar project in Arizona.

Restricted Cash and Investments

Other restricted cash and investments includes $439 million restricted for construction of the Topaz Project.

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(7) Recent Financing Transactions

In January 2012, PacifiCorp issued $350 million of its 2.95% First Mortgage Bonds due February 1, 2022 and $300 million of its 4.10% First Mortgage Bonds due February 1, 2042. The net proceeds were used to repay short-term debt, fund capital expenditures and for general corporate purposes. In March 2012, PacifiCorp issued an additional $100 million of its 2.95% First Mortgage Bonds due February 1, 2022. The net proceeds were used to redeem $84 million of tax-exempt bond obligations prior-to-scheduled maturity with a weighted average interest rate of 5.7%, repay short-term debt and for general corporate purposes.

In February 2012, Topaz Solar Farms, LLC ("Topaz") issued $850 million of the 5.75% Series A Senior Secured Notes. The principal of the notes amortize beginning September 2015 with a final maturity in September 2039. The net proceeds will be used to fund the costs and expenses related to the development, construction and financing of the Topaz Project. Any unused amounts will be invested or, in certain circumstances, loaned to MEHC. As of March 31, 2012, $296 million was loaned to MEHC.

In connection with its offering, Topaz entered into a letter of credit and reimbursement facility in an aggregate principal amount of $345 million. Letters of credit issued under the letter of credit facility will be used to (a) provide security under the power purchase agreement and large generator interconnection agreements, (b) fund the debt service reserve requirement and the operation and maintenance debt service reserve requirement, (c) provide security for our remediation and mitigation liabilities, and (d) provide security in respect of our conditional use permit sales tax obligations. As of March 31, 2012, Topaz had $28 million of letters of credit issued under this facility.

Pursuant to an equity funding and contribution agreement, MEHC has committed to provide Agua Caliente with funding for (a) base equity contributions of up to an aggregative amount of $303 million for the construction of the project, and (b) transmission upgrade costs. In January 2012, MEHC entered into a $303 million letter of credit facility related to its funding commitments. The equity funding and contribution agreement and the letter of credit commitment decreases as equity is contributed to the Agua Caliente Project. As of March 31, 2012, the balance of the commitment was $273 million.

Additionally, during the three-month period endedMarch 31, 2012, MEHC issued letters of credit totaling $31 million, of which $30 million were issued under its existing unsecured credit facility, to support the construction of renewable generation projects acquired in 2012. Additionally, PacifiCorp issued letters of credit totaling $135 million under its existing unsecured credit facilities as collateral for commodity derivative agreements.

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(8) Employee Benefit Plans

Domestic Operations

Net periodic benefit cost for the domestic pension and other postretirement benefit plans included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Pension:
Service cost	$	6		$	6
Interest cost	24			25
Expected return on plan assets	(29		)	(27		)
Net amortization	10			5
Net periodic benefit cost	$	11		$	9
Other postretirement:
Service cost	$	3		$	2
Interest cost	9			11
Expected return on plan assets	(11		)	(10		)
Net amortization	1			3
Net periodic benefit cost	$	2		$	6

Employer contributions to the domestic pension and other postretirement benefit plans are expected to be $81 million and $9 million, respectively, during 2012. As of March 31, 2012, $20 million and $2 million of contributions had been made to the domestic pension and other postretirement benefit plans, respectively.

Foreign Operations

Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Service cost	$	5		$	5
Interest cost	21			23
Expected return on plan assets	(26		)	(29		)
Net amortization	14			9
Net periodic benefit cost	$	14		$	8

Employer contributions to the United Kingdom pension plan are expected to be £50 million during 2012. As of March 31, 2012, £12 million, or $19 million, of contributions had been made to the United Kingdom pension plan.

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(9) Income Taxes

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

	Three-Month Periods
	Ended March 31,
	2012		2011
Federal statutory income tax rate	35	%	35	%
Federal and state income tax credits	(10	)	(9	)
State income tax, net of federal income tax benefit	3		1
Income tax effect of foreign income	(3	)	(2	)
Effects of ratemaking	(2	)	(1	)
Other, net	(1	)	1
Effective income tax rate	22	%	25	%

Federal and state income tax credits primarily relate to production tax credits at the Utilities. The Utilities' wind-powered generating facilities are eligible for federal renewable electricity production tax credits for 10 years from the date the facilities were placed in service.

Berkshire Hathaway includes the Company in its United States federal income tax return. As of March 31, 2012 and December 31, 2011, income taxes receivable from Berkshire Hathaway totaled $552 million and $456 million, respectively.

(10) Commitments and Contingencies

Environmental Laws and Regulations

The Company is subject to federal, state, local and foreign laws and regulations regarding air and water quality, renewable portfolio standards, 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 the Company's current and future operations. The Company believes it is in material compliance with all applicable laws and regulations.

Hydroelectric Relicensing

PacifiCorp's hydroelectric portfolio consists of 44 generating facilities with an aggregate facility net owned capacity of 1,145 megawatts. The Federal Energy Regulatory Commission ("FERC") regulates 98% of the net capacity of this portfolio through 15 individual licenses, which have terms of 30 to 50 years. PacifiCorp expects to incur ongoing operating and maintenance expense and capital expenditures associated with the terms of its renewed hydroelectric licenses and settlement agreements, including natural resource enhancements. PacifiCorp's Klamath hydroelectric system is currently operating under annual licenses. Substantially all of PacifiCorp's remaining hydroelectric generating facilities are operating under licenses that expire between 2030 and 2058.

In February 2010, PacifiCorp, the United States Department of the Interior, the United States Department of Commerce, the State of California, the State of Oregon and various other governmental and non-governmental settlement parties signed the Klamath Hydroelectric Settlement Agreement ("KHSA"). Among other things, the KHSA provides that the United States Department of the Interior conduct scientific and engineering studies to assess whether removal of the Klamath hydroelectric system's four mainstem dams is in the public interest and will advance restoration of the Klamath Basin's salmonid fisheries. If it is determined that dam removal should proceed, dam removal is expected to commence no earlier than 2020.

Under the KHSA, PacifiCorp and its customers are protected from uncapped dam removal costs and liabilities. For dam removal to occur, federal legislation consistent with the KHSA must be enacted to provide, among other things, protection for PacifiCorp from all liabilities associated with dam removal activities. If Congress does not enact legislation, then PacifiCorp will resume relicensing at the FERC. In November 2011, bills were introduced in both chambers of the United States Congress that, if passed, would enact the KHSA and a companion agreement that seeks to resolve other water-related conflicts and restore habitat in the Klamath basin.

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In addition, the KHSA limits PacifiCorp's contribution to dam removal costs to no more than $200 million, of which up to $184 million would be collected from PacifiCorp's Oregon customers with the remainder to be collected from PacifiCorp's California customers. An additional $250 million for dam removal costs is expected to be raised through a California bond measure or other appropriate State of California financing mechanism. If dam removal costs exceed $200 million and if the State of California is unable to raise the additional funds necessary for dam removal costs, sufficient funds would need to be provided by an entity other than PacifiCorp in order for the KHSA and dam removal to proceed.

PacifiCorp has begun collection of surcharges from Oregon customers for their share of dam removal costs, as approved by the Oregon Public Utility Commission ("OPUC"), and is depositing the proceeds in a trust account maintained by the OPUC. PacifiCorp has begun collection of surcharges from California customers for their share of dam removal costs, as approved by the California Public Utilities Commission ("CPUC"), and is depositing the proceeds into two trust accounts maintained by the CPUC. PacifiCorp is authorized to collect the surcharges through 2019.

As of March 31, 2012, PacifiCorp's property, plant and equipment, net included $123 million of costs associated with the Klamath hydroelectric system's four mainstem dams and the associated relicensing and settlement costs. PacifiCorp has received approvals from the OPUC, the CPUC and the Wyoming Public Service Commission to depreciate the Klamath hydroelectric system's four mainstem dams and the associated relicensing and settlement costs through the expected dam removal date. The depreciation rate changes were effective January 1, 2011 and will allow for full depreciation of the assets by December 2019 for those jurisdictions. PacifiCorp filed for consistent ratemaking treatment in the last Idaho general rate case, which was settled in January 2012 without a decision on this matter. PacifiCorp expects to seek similar approval in Washington. As part of the July 2011 Utah general rate case settlement that was approved by the Utah Public Service Commission in August 2011, PacifiCorp and the other parties to the settlement agreed to defer a decision regarding the acceleration of the depreciation rates for the Klamath hydroelectric system's four mainstem dams to a future rate proceeding, at which time Utah's $34 million share of associated relicensing and settlement costs would be addressed. In the 2012 Utah general rate case, PacifiCorp has requested approval for Utah's share of accelerated depreciation of the Klamath hydroelectric system's four mainstem dams and associated relicensing and settlement costs. This proceeding is currently ongoing.

Legal Matters

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

Guarantees

The Company has entered into guarantees as part of the normal course of business and the sale of certain assets. These guarantees are not expected to have a material impact on the Company's consolidated financial results.

(11) Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in accumulated other comprehensive loss attributable to MEHC by each component of other comprehensive income, net of applicable income taxes, for the three-month period endedMarch 31, 2012 (in millions):

							Unrealized					Accumulated
	Unrecognized			Foreign			Gains on		Unrealized			Other
	Amounts on			Currency			Available-		Gains on			Comprehensive
	Retirement			Translation			For-Sale		Cash Flow			Loss Attributable
	Benefits			Adjustment			Securities		Hedges			To MEHC, Net
Balance, December 31, 2011	$	(491	)	$	(307	)	$	142	$	15		$	(641	)
Other comprehensive (loss) income	(5		)	85			89		(15		)	154
Balance, March 31, 2012	$	(496	)	$	(222	)	$	231	$	—		$	(487	)

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(12) Segment Information

MEHC's reportable segments were determined based on how the Company's strategic units are managed. Northern Natural Gas and Kern River have been aggregated in the reportable segment called MidAmerican Energy Pipeline Group, and CalEnergy Philippines and MidAmerican Renewables, LLC have been aggregated in the reportable segment called MidAmerican Renewables. Prior year amounts have been changed to conform to the current presentation. The Company's reportable segments with foreign operations include Northern Powergrid Holdings, whose business is principally in Great Britain, and MidAmerican Renewables, whose business includes operations in the Philippines. Intersegment eliminations and adjustments, including the allocation of goodwill, have been made. Information related to the Company's reportable segments is shown below (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Operating revenue:
PacifiCorp	$	1,191		$	1,119
MidAmerican Funding	874			979
MidAmerican Energy Pipeline Group	302			293
Northern Powergrid Holdings	263			252
MidAmerican Renewables	31			32
HomeServices	209			189
MEHC and Other(1)	(23		)	(20		)
Total operating revenue	$	2,847		$	2,844
Depreciation and amortization:
PacifiCorp	$	161		$	155
MidAmerican Funding	93			85
MidAmerican Energy Pipeline Group	48			46
Northern Powergrid Holdings	41			41
MidAmerican Renewables	7			8
HomeServices	3			3
MEHC and Other(1)	(2		)	(3		)
Total depreciation and amortization	$	351		$	335
Operating income:
PacifiCorp	$	281		$	271
MidAmerican Funding	91			113
MidAmerican Energy Pipeline Group	183			177
Northern Powergrid Holdings	157			159
MidAmerican Renewables	17			16
HomeServices	(6		)	(12		)
MEHC and Other(1)	(7		)	(20		)
Total operating income	716			704
Interest expense	(290		)	(303		)
Capitalized interest	9			9
Interest and dividend income	3			3
Other, net	33			26
Total income before income tax expense and equity income	$	471		$	439

22

	Three-Month Periods
	Ended March 31,
	2012		2011
Interest expense:
PacifiCorp	$	99	$	100
MidAmerican Funding	43		48
MidAmerican Energy Pipeline Group	23		27
Northern Powergrid Holdings	33		39
MidAmerican Renewables	9		5
MEHC and Other(1)	83		84
Total interest expense	$	290	$	303

	As of
	March 31,		December 31,
	2012		2011
Total assets:
PacifiCorp	$	22,538	$	22,364
MidAmerican Funding	12,489		12,430
MidAmerican Energy Pipeline Group	4,858		4,854
Northern Powergrid Holdings	5,932		5,690
MidAmerican Renewables	2,026		890
HomeServices	702		649
MEHC and Other(1)	822		841
Total assets	$	49,367	$	47,718

(1) The remaining differences between the segment amounts and the consolidated amounts described as "MEHC and Other" relate principally to intersegment eliminations for operating revenue and, for the other items presented, to (a) corporate functions, including administrative costs, interest expense, corporate cash and investments and related interest income and (b) intersegment eliminations.

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period endedMarch 31, 2012 (in millions):

					MidAmerican
					Energy			Northern
			MidAmerican		Pipeline			Powergrid		MidAmerican		Home-
	PacifiCorp		Funding		Group			Holdings		Renewables		Services		Total
Balance, December 31, 2011	$	1,126	$	2,102	$	205		$	1,097	$	71	$	395	$	4,996
Foreign currency translation	—		—		—			26		—		—		26
Other	—		—		(7		)	—		—		24		17
Balance, March 31, 2012	$	1,126	$	2,102	$	198		$	1,123	$	71	$	419	$	5,039

23

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

The following is management's discussion and analysis of certain significant factors that have affected the consolidated financial condition and results of operations of the Company during the periods included herein. Explanations include management's best estimate of the impacts of weather, customer growth and other factors. This discussion should be read in conjunction with the Company's historical unaudited Consolidated Financial Statements and Notes to Consolidated Financial Statements in Item 1 of this Form 10-Q. The Company's actual results in the future could differ significantly from the historical results.

The Company's operations are organized and managed as eight distinct platforms: PacifiCorp, MidAmerican Funding (which primarily consists of MidAmerican Energy), Northern Natural Gas, Kern River, Northern Powergrid Holdings (which primarily consists of Northern Powergrid (Northeast) Limited and Northern Powergrid (Yorkshire) plc), CalEnergy Philippines (which owns a majority interest in the Casecnan project in the Philippines), MidAmerican Renewables, LLC (which owns interests in independent power projects in the United States), and HomeServices. Through these platforms, the Company owns and operates an electric utility company in the Western United States, an electric and natural gas utility company in the Midwestern United States, two interstate natural gas pipeline companies in the United States, two electricity distribution companies in Great Britain, a diversified portfolio of independent power projects and the second largest residential real estate brokerage firm in the United States. Northern Natural Gas and Kern River have been aggregated in the reportable segment called MidAmerican Energy Pipeline Group, and CalEnergy Philippines and MidAmerican Renewables, LLC have been aggregated in the reportable segment called MidAmerican Renewables. The reportable segment financial information includes all necessary adjustments and eliminations needed to conform to the Company's significant accounting policies. The differences between the reportable segment amounts and the consolidated amounts, described as "MEHC and Other," relate principally to corporate functions, including administrative costs and intersegment eliminations.

Results of Operations for the First Quarter of 2012 and 2011

Overview

Net income attributable to MEHC for the three-month period ended March 31, 2012, was $375 million, an increase of $44 million, or 13%, compared to 2011. PacifiCorp's net income was $150 million for 2012, an increase of $23 million, or 18%, compared to 2011 as higher retail prices approved by regulators, higher renewable energy credit revenue, higher wholesale revenue, lower operating expense and lower income tax expense were partially offset by higher energy costs, lower retail customer load and higher depreciation and amortization. Net income at MidAmerican Funding was $71 million for 2012, an increase of $2 million, or 3%, compared to 2011 due to income tax benefits from higher production tax credits and the effects of ratemaking and lower interest expense, partially offset by lower regulated gas margins and higher depreciation and amortization. Net income at MidAmerican Energy Pipeline Group was $97 million for 2012, an increase of $3 million, or 3%, compared to 2011 due to higher operating revenue, net of higher depreciation, related to the Kern River Apex Expansion project, which was placed in service in October 2011. Northern Powergrid Holdings' net income was $93 million for 2012, an increase of $5 million, or 6%, for 2011 due to higher distribution rates and lower interest expense, partially offset by recoveries of certain regulatory provisions in 2011 and higher operating expense. MidAmerican Renewables' net income was $5 million for 2012, a decrease of $6 million, or 55%, for 2011 primarily due to higher interest expense related to the Topaz project financing. HomeServices' net loss of $1 million for 2012 improved $5 million compared to 2011 due to higher mortgage profits and higher revenue from higher closed units, partially offset by lower average home sale prices. MEHC and Other net loss of $40 million decreased $12 million for 2012 compared to 2011 due to the cessation of purchase price pension amortization in 2011, lower claims at captive insurance companies in 2012 and lower interest expense.

24

Reportable Segment Results

Operating revenue and operating income for the Company's reportable segments are summarized as follows (in millions):

	First Quarter
	2012			2011			Change
Operating revenue:
PacifiCorp	$	1,191		$	1,119		$	72		6	%
MidAmerican Funding	874			979			(105		)	(11	)
MidAmerican Energy Pipeline Group	302			293			9			3
Northern Powergrid Holdings	263			252			11			4
MidAmerican Renewables	31			32			(1		)	(3	)
HomeServices	209			189			20			11
MEHC and Other	(23		)	(20		)	(3		)	(15	)
Total operating revenue	$	2,847		$	2,844		$	3		—

Operating income:
PacifiCorp	$	281		$	271		$	10		4	%
MidAmerican Funding	91			113			(22		)	(19	)
MidAmerican Energy Pipeline Group	183			177			6			3
Northern Powergrid Holdings	157			159			(2		)	(1	)
MidAmerican Renewables	17			16			1			6
HomeServices	(6		)	(12		)	6			50
MEHC and Other	(7		)	(20		)	13			65
Total operating income	$	716		$	704		$	12		2

PacifiCorp

Operating revenue increased $72 million for 2012 compared to 2011 due to higher retail revenue of $48 million and higher wholesale and other revenue of $24 million. The increase in retail revenue was due to higher prices approved by regulators of $60 million, partially offset by lower retail customer load totaling $12 million due to the impacts of mild weather on residential loads in PacifiCorp's eastern service territory. The increase in wholesale and other revenue was due to higher volumes of $32 million on higher short-term sales from increased thermal generation availability and improved natural gas spark spreads, partially offset by lower average market prices on short-term wholesale sales. Additionally, renewable energy credit revenue increased $16 million.

Operating income increased $10 million for 2012 compared to 2011 due to the higher operating revenue and lower operating expense of $5 million, partially offset by higher energy costs of $62 million and higher depreciation and amortization of $6 million due to higher plant in service. Energy costs increased due to reduced electricity swap settlement gains totaling $51 million, higher thermal generation and the impact of energy adjustment mechanisms of $15 million, partially offset by lower purchased power volumes. Energy supplied increased 5% for 2012 compared to 2011 due to a 10% increase in thermal generation due to higher availability and improved spark spreads on natural gas-fueled generation, partially offset by lower purchased power volumes of 14%. Operating expense decreased due to lower plant operating costs, partially offset by higher property taxes due to higher plant in service.

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MidAmerican Funding

MidAmerican Funding's operating revenue and operating income are summarized as follows (in millions):

	First Quarter
	2012		2011		Change
Operating revenue:
Regulated electric	$	380	$	377	$	3		1	%
Regulated natural gas	263		333		(70		)	(21	)
Nonregulated and other	231		269		(38		)	(14	)
Total operating revenue	$	874	$	979	$	(105	)	(11	)
Operating income:
Regulated electric	$	48	$	50	$	(2	)	(4	)%
Regulated natural gas	30		45		(15		)	(33	)
Nonregulated and other	13		18		(5		)	(28	)
Total operating income	$	91	$	113	$	(22	)	(19	)

Regulated electric operating revenue increased $3 million for 2012 compared to 2011 due to higher wholesale and other revenue of $11 million, partially offset by lower retail revenue of $8 million. Retail revenue decreased due to a 3% decrease in customer load as a result of decreased residential and commercial sales primarily due to unseasonably warm temperatures, partially offset by customer growth. Wholesale and other revenue increased due to higher volumes of 46% due to lower retail loads and the addition of 594 megawatts of wind-powered generation in late 2011, partially offset by lower average prices of 18%.

Regulated electric operating income decreased $2 million for 2012 compared to 2011 as the higher operating revenue and lower energy costs of $2 million were more than offset by higher depreciation and amortization of $8 million due to additional wind-powered generation placed in service in 2011, partially offset by lower depreciation rates that were effective June 1, 2011, following the results of a depreciation study. Energy costs decreased due to higher wind-powered generation and lower thermal generation costs. Lower maintenance costs due to the Louisa Generating Station outage in 2011 were substantially offset by higher maintenance costs on wind-powered generating facilities in 2012.

Regulated natural gas operating revenue decreased $70 million for 2012 compared to 2011 due to a lower average per-unit cost of gas sold and lower volumes sold of 8% from unseasonably warm weather, also resulting in lower cost of sales. Regulated natural gas operating income decreased by $15 million from 2012 compared to 2011 due to lower volume-related gas margins.

Nonregulated and other operating revenue decreased $38 million for 2012 compared to 2011 due to lower electricity and natural gas prices and volumes. Nonregulated and other operating income decreased $5 million for 2012 compared to 2011 due to lower electric margins.

MidAmerican Energy Pipeline Group

Operating revenue increased $9 million for 2012 compared to 2011 due to increased capacity from the Kern River Apex Expansion project being placed in service in October 2011 and better natural gas price spreads, partially offset by contract expirations. Operating income increased $6 million for 2012 compared to 2011 due to the higher operating revenue, partially offset by higher depreciation due to the Kern River Apex Expansion project being placed in service in October 2011.

Northern Powergrid Holdings

Operating revenue increased $11 million for 2012 compared to 2011 due to higher distribution revenue of $18 million, partially offset by the stronger United States dollar totaling $5 million. Distribution revenue increased due to higher tariff rates of $31 million, partially offset by recoveries of certain regulatory provisions in 2011 and lower volumes caused by warm winter weather. Operating income decreased by $2 million for 2012 compared to 2011 as the higher operating revenue was more than offset by higher pension amortization of $13 million.

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HomeServices

Operating revenue increased $20 million for 2012 compared to 2011 due to a 14% increase in closed brokerage units, partially offset by a 5% decrease in average home sale prices. Operating income increased $6 million for 2012 compared to 2011 due to the higher operating revenue, net of commissions.

MEHC and Other

Operating loss decreased $13 million for 2012 compared to 2011 due to the cessation of purchase price pension amortization in 2011 and lower claims at captive insurance companies in 2012.

Consolidated Other Income and Expense Items

Interest Expense

Interest expense is summarized as follows (in millions):

	First Quarter
	2012		2011		Change
Subsidiary debt	$	206	$	213	$	(7	)	(3	)%
MEHC senior debt and other	84		82		2			2
MEHC subordinated debt - Berkshire Hathaway	—		5		(5		)	(100	)
MEHC subordinated debt - other	—		3		(3		)	(100	)
Total interest expense	$	290	$	303	$	(13	)	(4	)

Interest expense decreased $13 million for 2012 compared to 2011 due to scheduled maturities and early principal repayments in 2011, partially offset by the debt issuances at PacifiCorp ($400 million in May 2011, $650 million in January 2012 and $100 million in March 2012), Northern Natural Gas ($200 million in April 2011) and MidAmerican Renewables ($850 million in February 2012).

Other, Net

Other, net increased $7 million for 2012 compared to 2011 due to higher Rabbi Trust earnings and higher equity AFUDC at PacifiCorp, partially offset by lower equity AFUDC at MidAmerican Energy Pipeline Group due to the Kern River Apex Expansion project being placed in service in October 2011.

Income Tax Expense

Income tax expense decreased $7 million for 2012 compared to 2011 and the effective tax rates were 22% for 2012 and 25% for 2011. The decrease in the effective tax rate was due to higher income tax benefits related to the effects of ratemaking and additional production tax credits at MidAmerican Energy due to wind-powered generation placed in service in late 2011.

Equity Income

Equity income increased $5 million for 2012 compared to 2011 due to higher earnings at HomeServices' mortgage joint venture due to higher refinancing activity and higher earnings at Electric Transmission Texas due to continued investment.

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Liquidity and Capital Resources

Each of MEHC's direct and indirect subsidiaries is organized as a legal entity separate and apart from MEHC and its other subsidiaries. It should not be assumed that the assets of any subsidiary will be available to satisfy MEHC's obligations or the obligations of its other subsidiaries. However, unrestricted cash or other assets that are available for distribution may, subject to applicable law, regulatory commitments and the terms of financing and ring-fencing arrangements for such parties, be advanced, loaned, paid as dividends or otherwise distributed or contributed to MEHC or affiliates thereof. The long-term debt of subsidiaries may include provisions that allow MEHC's subsidiaries to redeem it in whole or in part at any time. These provisions generally include make-whole premiums. Refer to Note 17 of Notes to Consolidated Financial Statements in Item 8 of the Company's Annual Report on Form 10-K for further discussion regarding the limitation of distributions from MEHC's subsidiaries.

As of March 31, 2012, the Company's total net liquidity was $4.494 billion. The components of total net liquidity are as follows (in millions):

										Northern
							MidAmerican			Powergrid
	MEHC			PacifiCorp			Funding			Holdings			Other			Total
Cash and cash equivalents	$	68		$	45		$	43		$	28		$	198		$	382
Credit facilities	552			1,355			654			240			95			2,896
Less:
Short-term debt	—			—			—			(64		)	(34		)	(98		)
Tax-exempt bond support and letters of credit	(52		)	(439		)	(195		)	—			—			(686		)
Net credit facilities	500			916			459			176			61			2,112
Net liquidity before Berkshire Equity Commitment	568			$	961		$	502		$	204		$	259		2,494
Berkshire Equity Commitment(1)	2,000															2,000
Total net liquidity	$	2,568														$	4,494
Unsecured revolving credit facilities:
Maturity date	2013			2012, 2013			2012, 2013			2013			2012, 2013
Largest single bank commitment as a % of total revolving credit facilities(2)	18		%	16		%	23		%	33		%	53		%

(1) MEHC has an Equity Commitment Agreement with Berkshire Hathaway (the "Berkshire Equity Commitment") pursuant to which Berkshire Hathaway has agreed to purchase up to $2.0 billion of MEHC's common equity upon any requests authorized from time to time by MEHC's Board of Directors. The proceeds of any such equity contribution shall only be used for the purpose of (a) paying when due MEHC's debt obligations and (b) funding the general corporate purposes and capital requirements of MEHC's regulated subsidiaries. The Berkshire Equity Commitment expires on February 28, 2014.

(2) An inability of financial institutions to honor their commitments could adversely affect the Company's short-term liquidity and ability to meet long-term commitments.

The above table does not include unused revolving credit facilities and letters of credit for investments that are accounted for under the equity method.

Operating Activities

Net cash flows from operating activities for the three-month periods endedMarch 31, 2012 and 2011 were $932 million and $817 million, respectively. The increase was primarily due to changes in collateral posted for derivative contracts as a result of replacing certain cash collateral outstanding with letters of credit, improved operating results and other changes in working capital.

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In December 2010, the President signed the Tax Relief, Unemployment Insurance Reauthorization, and Job Creation Act of 2010 into law, which provided for 100% bonus depreciation for qualifying property purchased and placed in service after September 8, 2010 and prior to January 1, 2012, and extended 50% bonus depreciation for qualifying property purchased and placed in service after December 31, 2010 and prior to January 1, 2013. As a result of this legislation, the Company's cash flows from operations are expected to benefit in 2012 due to bonus depreciation on qualifying assets placed in service in 2012 and from income taxes received in 2012 for assets placed in service in 2011.

Investing Activities

Net cash flows from investing activities for the three-month periods endedMarch 31, 2012 and 2011 were $(1.471) billion and $(560) million, respectively. The change was primarily due to an increase in restricted cash and investments related to proceeds from the issuance of $850 million of long-term debt at Topaz that is restricted for use in the construction of the 550-MW Topaz Project; the acquisitions of Topaz and Bishop Hill and a 49% interest in Agua Caliente; and higher capital expenditures at the Utilities and MidAmerican Renewables.

Capital Expenditures

Capital expenditures, which exclude amounts for non-cash equity AFUDC and other non-cash items, by reportable segment for the three-month periods endedMarch 31 are summarized as follows (in millions):

	2012		2011
Capital expenditures:
PacifiCorp	$	405	$	352
MidAmerican Funding	117		98
MidAmerican Energy Pipeline Group	15		33
Northern Powergrid Holdings	69		67
MidAmerican Renewables	149		—
Other	1		1
Total capital expenditures	$	756	$	551

The Company's capital expenditures relate primarily to the Utilities and consisted mainly of the following for the three-month periods endedMarch 31:

2012:

• Transmission system investments totaling $93 million, including construction costs for PacifiCorp's 100-mile high-voltage transmission line being built between the Mona substation in central Utah and the Oquirrh substation in the Salt Lake Valley. A 65-mile segment of the Mona-Oquirrh transmission project will be a single-circuit 500-kV transmission line, while the remaining 35-mile segment will be a double-circuit 345-kV transmission line. The transmission line is expected to be placed in service in 2013.

• The development and construction of PacifiCorp's Lake Side 2 637-MW combined-cycle combustion turbine natural gas-fueled generating facility ("Lake Side 2") totaling $60 million, which is expected to be placed in service in 2014.

• Emissions control equipment on existing generating facilities totaling $40 million for installation or upgrade of sulfur dioxide scrubbers, low nitrogen oxide burners and particulate matter control systems.

• The construction of MidAmerican Energy's 407 MW of wind-powered generating facilities totaling $19 million.

• Distribution, generation, mining and other infrastructure needed to serve existing and expected demand totaling $310 million.

29

2011:

• Emissions control equipment on existing generating facilities totaling $90 million for installation or upgrade of sulfur dioxide scrubbers, low nitrogen oxide burners and particulate matter control systems, including costs for projects that were placed in service in April 2011.

• Transmission system investments totaling $58 million, including permitting and right-of-way costs for the Mona-Oquirrh transmission project.

• Distribution, generation, mining and other infrastructure needed to serve existing and expected demand totaling $302 million.

Additionally, capital expenditures for the three-month period endedMarch 31, 2012 include costs related to MidAmerican Renewables totaling $149 million related to the Topaz Project and Bishop Hill Project. The remaining amounts are for ongoing investments in distribution and other infrastructure needed at the other platforms to serve existing and expected demand.

Financing Activities

Net cash flows from financing activities for the three-month period endedMarch 31, 2012 was $634 million. Sources of cash totaled $1.599 billion related to proceeds from subsidiary debt. Uses of cash totaled $965 million and consisted mainly of net repayments of short-term debt totaling $795 million, repayments of subsidiary debt totaling $114 million and repayment of MEHC subordinated debt totaling $22 million. For the three-month period endedMarch 31, 2012, subsidiary debt issuances included the following:

• In January 2012, PacifiCorp issued $350 million of its 2.95% First Mortgage Bonds due February 1, 2022 and $300 million of its 4.10% First Mortgage Bonds due February 1, 2042. The net proceeds were used to repay short-term debt, fund capital expenditures and for general corporate purposes. In March 2012, PacifiCorp issued an additional $100 million of its 2.95% First Mortgage Bonds due February 1, 2022. The net proceeds were used to redeem $84 million of tax-exempt bond obligations prior-to-scheduled maturity with a weighted average interest rate of 5.7%, repay short-term debt and for general corporate purposes.

• In February 2012, Topazissued $850 million of the 5.75% Series A Senior Secured Notes. The principal of the notes amortize beginning September 2015 with a final maturity in September 2039. The net proceeds will be used to fund the costs and expenses related to the development, construction and financing of the Topaz Project. Any unused amounts will be invested or, in certain circumstances, loaned to MEHC. As of March 31, 2012, $296 million was loaned to MEHC.

Net cash flows from financing activities for the three-month period endedMarch 31, 2011 was $173 million. Sources of cash totaled $408 million and consisted of net proceeds from short-term debt totaling $217 million and proceeds from subsidiary debt totaling $191 million. Uses of cash totaled $235 million and consisted mainly of repayments of subsidiary debt totaling $224 million.

Future Uses of Cash

The Company has 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, the issuance of equity and other sources. These sources are expected to provide funds required for current operations, capital expenditures, acquisitions, investments, debt retirements and other capital requirements. The availability and terms under which each subsidiary has access to external financing depends on a variety of factors, including its credit ratings, investors' judgment of risk and conditions in the overall capital market, including the condition of the utility industry in general. Additionally, MEHC has the Berkshire Equity Commitment pursuant to which Berkshire Hathaway has agreed to purchase up to $2.0 billion of MEHC's common equity upon any requests authorized from time to time by MEHC's Board of Directors. The Berkshire Equity Commitment expires on February 28, 2014 and may only be used for the purpose of (a) paying when due MEHC's debt obligations and (b) funding the general corporate purposes and capital requirements of MEHC's regulated subsidiaries. Berkshire Hathaway will have up to 180 days to fund any such request in increments of at least $250 million pursuant to one or more drawings authorized by MEHC's Board of Directors. The funding of any such drawing will be made by means of a cash equity contribution to MEHC in exchange for additional shares of MEHC's common stock.

30

Capital Expenditures

The Company has significant future capital requirements. 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 rules and regulations, including environmental and nuclear; 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; and the cost and availability of capital. Prudently incurred expenditures for compliance-related items, such as pollution-control technologies, replacement generation, nuclear decommissioning, hydroelectric relicensing, hydroelectric decommissioning and associated operating costs are generally incorporated into MEHC's energy subsidiaries' regulated retail rates.

Forecasted capital expenditures, which exclude amounts for non-cash equity AFUDC and other non-cash items, are approximately $3.8 billion for 2012 and consist mainly of large scale projects at the Utilities and MidAmerican Renewables, including the following:

• $835 million for the Topaz Project, which is a 550-MW solar project in California that will be completed in 22 blocks through 2015, with an aggregate tested capacity of 586 MW. The Topaz Project expects to place 45 MW in service in 2012.

• $212 million for 407 MW of wind-powered generation at MidAmerican Energy that it expects to place in service in 2012, excluding approximately $400 million of payments deferred until the fourth quarter of 2015.

• $364 million for transmission system investments, including $278 million for the Energy Gateway Transmission Expansion Program, which includes construction costs for the Mona-Oquirrh transmission line.

• $265 million for emissions control equipment at the Utilities, which includes equipment to meet air quality and visibility targets, including the reduction of sulfur dioxide, nitrogen oxides and particulate matter emissions. This estimate includes the installation of new or the replacement of existing emissions control equipment at several of the Utilities' coal-fueled generating facilities.

• $233 million for development and construction of Lake Side 2, which is expected to be placed in service in 2014.

• $149 million for the construction of the Bishop Hill Project, an 81-MW wind-powered generating facility in Illinois that is expected to be placed in service in 2012. In March 2012, MEHC, through a wholly-owned subsidiary, acquired Bishop Hill from Invenergy Wind LLC, which included the Bishop Hill Project.

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

Equity Investments

ETT, a company owned equally by subsidiaries of American Electric Power Company, Inc. and MEHC, owns and operates electric transmission assets in the ERCOT. In order to fund ETT's ongoing transmission investment, MEHC expects to make equity contributions to ETT during 2012 of $107 million.

Agua Caliente, a company owned 51% by NRG Energy, Inc. and 49% by a subsidiary of MEHC, is constructing the 290-MW Agua Caliente Project in Arizona that will be completed in 12 blocks through 2014. Pursuant to an equity funding and contribution agreement, MEHC has committed to provide Agua Caliente with funding for (a) base equity contributions of up to an aggregate amount of $303 million for the construction of the project and (b) transmission upgrade costs. MEHC expects to make equity contributions to Agua Caliente during 2012 of $266 million.

Contractual Obligations

As of March 31, 2012, there have been no material changes outside the normal course of business in contractual obligations from the information provided in Item 7 of the Company's Annual Report on Form 10-K for the year ended December 31, 2011 other than the 2012 debt issuances previously discussed. Additionally, refer to the "Capital Expenditures" discussion included in "Liquidity and Capital Resources."

31

On April 25, 2012, MidAmerican Energy entered into a multi-year coal transportation agreement with BNSF Railway Company, an affiliate of the Company, for long-haul delivery of coal to MidAmerican Energy's generating facilities that are not “captive” to a single railroad. The new contract will provide delivery for the majority of the coal anticipated to be delivered to MidAmerican Energy-operated coal-fueled generating facilities beginning January 1, 2013. While prices for this rail service are significantly higher than those contained in MidAmerican Energy's legacy long-haul rail contract, which expires December 31, 2012, the BNSF Railway Company proposal was the lowest cost and best overall bid. Negotiations continue on arrangements for delivery of coal to MidAmerican Energy's other coal-fueled generating facilities.

Regulatory Matters

MEHC's regulated subsidiaries and certain affiliates are subject to comprehensive regulation. The discussion below contains material developments to those matters disclosed in Item 7 of the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

PacifiCorp

Utah

In February 2012, PacifiCorp filed a general rate case with the UPSC requesting a rate increase of $172 million, or an average price increase of 10%. If approved by the UPSC, the new rates are expected to be effective in October 2012.

In March 2012, PacifiCorp filed its first annual EBA with the UPSC requesting (a) $9 million for recovery of 70% of the net power costs in excess of amounts included in base rates for the period October 1, 2011 through December 31, 2011 and (b) collection of $20 million for the first annual installment of the $60 million of net power costs in excess of amounts included in base rates for the period prior to September 2011. The new rates will become effective in June 2012 on an interim basis until a final order is issued by the UPSC.

In March 2012, PacifiCorp filed with the UPSC to return $4 million to customers through the REC balancing account. The new rates will become effective in June 2012 on an interim basis until a final order is issued by the UPSC.

Oregon

In February 2012, PacifiCorp made its initial filing for the annual Transition Adjustment Mechanism with the OPUC for an annual increase of $10 million, or an average price increase of 1%, to recover the anticipated net power costs forecasted for calendar year 2013.

In March 2012, PacifiCorp filed a general rate case with the OPUC requesting an annual increase of $41 million, or an average price increase of 3%. As part of the general rate case filing, PacifiCorp indicated that it anticipates that the 172-MW Carbon coal-fueled generating facility ("Carbon Facility") will be retired in early 2015. If approved by the OPUC, the new rates are expected to be effective no later than January 1, 2013. Refer to "Environmental Laws and Regulations" for a further discussion regarding the Carbon Facility.

Wyoming

In December 2011, PacifiCorp filed a general rate case with the WPSC requesting an annual increase of $63 million, or an average price increase of 10%. If approved by the WPSC, the new rates are expected to be effective October 2012.

In March 2012, PacifiCorp made its first annual Wyoming ECAM filing with the WPSC. The filing requests recovery of $29 million, or an average price increase of 5%, for deferred net power costs for the period December 1, 2010 to December 31, 2011. The new rates will become effective in May 2012 on an interim basis until a final order is issued by the WPSC.

In March 2012, PacifiCorp filed its first annual Wyoming REC and Sulfur Dioxide Revenue Adjustment Mechanism ("RRA") application with the WPSC. The RRA tracks the difference between PacifiCorp's actual revenues from the sale of RECs and sulfur dioxide allowances and the amounts credited to customers in current rates. The filing requests to reduce the current surcredit by $1 million to $15 million. If approved by the WPSC, the surcredit will be effective in May 2012.

32

In September 2011, PacifiCorp filed with the WPSC an application for a certificate of public convenience and necessity ("CPCN") for pollution control projects in Wyoming. In April 2012, PacifiCorp filed testimony modifying its original CPCN application to reflect its current plan to convert Naughton Unit No. 3 to a natural gas-fueled unit as a result of PacifiCorp's current estimation that conversion is the least cost alternative for meeting air quality and visibility requirements and is in the best interest of customers. Public hearings regarding this matter are scheduled to begin in May 2012.

Washington

In May 2010, PacifiCorp filed a general rate case with the WUTC requesting an annual increase of $57 million, or an average price increase of 21%. In November 2010, the requested annual increase was reduced to $49 million, or an average price increase of 18%. In March 2011, the WUTC issued a final order and clarification letter approving an annual increase of $33 million, or an average price increase of 12%, reduced in the first year by a customer bill credit of $5 million, or 2%, related to the sale of RECs expected during the twelve-month period ended March 31, 2012, as well as requiring PacifiCorp to submit additional information to the WUTC regarding the sales of RECs. The new rates were effective in April 2011. Although both PacifiCorp and the WUTC staff filed petitions for reconsideration of various items on the final order, the WUTC denied the petitions for reconsideration. In May 2011, PacifiCorp submitted to the WUTC the additional information required by the March 2011 order regarding PacifiCorp's proceeds from sales of RECs for the period January 1, 2009 forward and a detailed proposal for a tracking mechanism for proceeds of RECs. Intervening parties and WUTC staff are proposing that PacifiCorp refund to customers the amount of REC sales in excess of the amount included in base rates since January 1, 2009. Initial and reply briefs from all parties were filed in November 2011. Oral arguments were held before the WUTC in January 2012 and an order is expected during the second quarter of 2012.

In July 2011, PacifiCorp filed a general rate case with the WUTC requesting an annual increase of $13 million, or an average price increase of 4%, with an effective date no later than June 1, 2012. In February 2012, the parties to the proceeding filed a settlement agreement with the WUTC reflecting an annual increase of $5 million, or an average price increase of 2%. In March 2012, the WUTC approved the settlement agreement with an effective date of June 2012.

Idaho

In February 2012, PacifiCorp filed an ECAM application with the IPUC requesting recovery of $18 million in deferred net power costs with a $3 million increase to the current ECAM surcharge rate. In March 2012, the IPUC approved the new rates with an effective date of April 2012. In April 2012, Monsanto Company filed a motion for reconsideration of the IPUC order.

MidAmerican Energy

On February 21, 2012, MidAmerican Energy filed an application with the IUB for an interim and final increase in Iowa retail electric rates in the form of two adjustment clauses to be added to customers' bills. The requested adjustment clauses and a modification to current revenue sharing provisions are consistent with a November 2011 settlement agreement between MidAmerican Energy and the OCA, in which the parties agree to support the proposed changes. The adjustment clauses would recover anticipated increases in retail coal and coal transportation costs and environmental control expenditures subject to an aggregate maximum of $39 million, or 3.4%, for 2012 and an additional $37 million for an aggregate maximum of $76 million for 2013, or a 3.2% increase from 2012. The requested modification to the existing revenue sharing provisions provides for MidAmerican Energy to share with its customers 20% of revenue associated with Iowa electric returns on equity between 10% and 10.5%, 50% of revenue associated with Iowa electric returns on equity between 10.5% and 11.75%, 75% of revenue associated with Iowa electric returns on equity between 11.75% and 13.0% and 83.3% of revenue associated with Iowa electric returns on equity above 13.0%. Such shared amounts would reduce MidAmerican Energy's investment in the Walter Scott, Jr. Energy Center Unit 4. There would be no revenue sharing for Iowa electric returns on equity below 10%. Pursuant to the settlement agreement, MidAmerican Energy is not precluded from seeking interim rate relief in 2013. MidAmerican Energy implemented the adjustment clauses on an interim basis in March 2012 and expects resolution of the related rate proceeding in the fourth quarter of 2012.

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Environmental Laws and Regulations

The Company is subject to federal, state, local and foreign laws and regulations regarding air and water quality, RPS, 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 the Company's current and future operations. In addition to imposing continuing compliance obligations, these laws and regulations provide regulators with the authority to levy substantial penalties for noncompliance including fines, injunctive relief and other sanctions. These laws and regulations are administered by the EPA and various other state, local and international agencies. All such laws and regulations are subject to a range of interpretation, which may ultimately be resolved by the courts. Environmental laws and regulations continue to evolve, and the Company is unable to predict the impact of the changing laws and regulations on its operations and consolidated financial results. The Company believes it is in material compliance with all applicable laws and regulations. Refer to "Liquidity and Capital Resources" for discussion of the Company's forecasted environmental-related capital expenditures. The discussion below contains material developments to those matters disclosed in Item 7 of the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

Clean Air Standards

Mercury and Air Toxics Standards

The Clean Air Mercury Rule ("CAMR"), issued by the EPA in March 2005, was the United States' first attempt to regulate mercury emissions from coal-fueled generating facilities through the use of a market-based cap-and-trade system. The CAMR, which mandated emissions reductions of approximately 70% by 2018, was overturned by the United States Court of Appeals for the District of Columbia Circuit ("D.C. Circuit") in February 2008. In March 2011, the EPA proposed a new rule that would require coal-fueled generating facilities to reduce mercury emissions and other hazardous air pollutants through the establishment of "Maximum Achievable Control Technology" standards rather than a cap-and-trade system. The final rule, Mercury and Air Toxics Standards ("MATS"), was published in the Federal Register on February 16, 2012, with an effective date of April 16, 2012, and requires that new and existing coal-fueled facilities achieve emission standards for mercury, acid gases and other non-mercury hazardous air pollutants. Existing sources are required to comply with the new standards by April 16, 2015. Individual sources may be granted up to one additional year, at the discretion of the Title V permitting authority, to complete installation of controls or for transmission system reliability reasons. While the final MATS continues to be reviewed by the Company, the Company believes that its emissions reduction projects completed to date or currently permitted or planned for installation, including scrubbers, baghouses and electrostatic precipitators are consistent with the EPA's MATS and will support the Company's ability to comply with the final rule's standards for acid gases and non-mercury metallic hazardous air pollutants. The Company will be required to take additional actions to reduce mercury emissions through the installation of controls or use of sorbent injection at certain of its coal-fueled generating facilities and otherwise comply with the final rule's standards. The Company is evaluating whether or not to close certain units. As a result of recent testing and evaluation, PacifiCorp currently anticipates that retiring the Carbon Facility in early 2015 will be the least-cost alternative to comply with the MATS and other environmental regulations. PacifiCorp continues to assess compliance alternatives and potential transmission system impacts that could otherwise impact PacifiCorp's ultimate decision with respect to the Carbon Facility, including timing of retirement and decommissioning. Incremental costs to install and maintain emissions control equipment at the Company's coal-fueled generating facilities and any requirement to shut down what have traditionally been low cost coal-fueled generating facilities will likely increase the cost of providing service to customers. In addition, numerous lawsuits are pending against the MATS rules in the D.C. Circuit, which may have an impact on the Company's compliance obligations and the timing of those obligations.

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Climate Change

GHG New Source Performance Standards

Under the Clean Air Act, the EPA may establish emissions standards that reflect the degree of emissions reductions achievable through the best technology that has been demonstrated, taking into consideration the cost of achieving those reductions and any non-air quality health and environmental impact and energy requirements. The EPA entered into a settlement agreement with a number of parties, including certain state governments and environmental groups, in December 2010 to promulgate emissions standards covering GHG by September 30, 2011, as amended, and issue final regulations by May 26, 2012. However, in mid-September, the EPA indicated it would not meet the September 30, 2011 deadline to promulgate the standards. 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 megawatt hour. The proposal exempts simple cycle combustion turbines from meeting the GHG standards. The proposal is open for public comments until June 12, 2012. The EPA indicated in the proposal that it does not have sufficient information to establish GHG new source performance standards for modified or reconstructed units and has not established a schedule for when these units, or other existing sources, will be regulated. Any new fossil-fueled generating facilities constructed by the Company will be required to meet the final GHG new source performance standards, which, if finalized as proposed, will preclude the construction of any coal-fueled generating facilities that do not have carbon capture and sequestration. Until any standards for existing, modified or reconstructed units are proposed and finalized, the impact on the Company's existing facilities cannot be determined.

GHG Litigation

In October 2009, a three-judge panel in the United States Court of Appeals for the Fifth Circuit ("Fifth Circuit") issued its opinion in the case of Ned Comer, et al. v. Murphy Oil USA, et al., ("Comer I") a putative class action lawsuit against insurance, oil, coal and chemical companies, based on claims that the defendants' GHG emissions contributed to global warming that in turn caused a rise in sea levels and added to the ferocity of Hurricane Katrina, which combined to damage the plaintiff's private property, as well as public property. In 2007, the United States District Court for the Southern District of Mississippi ("Southern District of Mississippi") dismissed the case based on the lack of standing and further held that the claims were barred by the political question doctrine. In March 2010, the full court of the Fifth Circuit agreed to rehear the case; however, in May 2010, the Fifth Circuit dismissed the appeal for failure to have a quorum, resulting in the Southern District of Mississippi's decision, holding that property owners did not have standing to sue for climate change and that climate change was a political question for the United States Congress, standing as good law. The plaintiffs filed a petition asking the United States Supreme Court to direct the Fifth Circuit to reinstate the appeal and return it to the original panel. In January 2011, the United States Supreme Court denied the request, resulting in the original dismissal of the case to stand. However, in May 2011, the Comer case was refiled ("Comer II") in the Southern District of Mississippi. In response to the defendants' motions to dismiss in Comer II, the Southern District of Mississippi, in March 2012, granted the motions, dismissing the suit with prejudice. Plaintiffs filed an appeal with the Fifth Circuit in April 2012. The Company was not a party in Comer I and is not a party in Comer II.

Collateral and Contingent Features

Debt and preferred securities of MEHC and certain of its subsidiaries are rated by credit rating agencies. Assigned credit ratings are based on each rating agency's assessment of the rated company's ability to, in general, meet the obligations of its issued debt or preferred securities. The credit ratings are not a recommendation to buy, sell or hold securities, and there is no assurance that a particular credit rating will continue for any given period of time.

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

35

In accordance with industry practice, certain wholesale agreements, including derivative contracts, contain provisions that require certain of MEHC's subsidiaries, principally the Utilities, to maintain specific credit ratings on their unsecured debt from one or more of the three recognized credit rating agencies. These agreements may either specifically provide bilateral rights to demand cash or other security if credit exposures on a net basis exceed specified rating-dependent threshold levels ("credit-risk-related contingent features") or provide the right for counterparties to demand "adequate assurance" in the event of a material adverse change in the subsidiary's creditworthiness. These rights can vary by contract and by counterparty. As of March 31, 2012, these subsidiary's credit ratings from the three recognized credit rating agencies were investment grade. If all credit-risk-related contingent features or adequate assurance provisions for these agreements had been triggered as of March 31, 2012, the Company would have been required to post $610 million of additional collateral. The Company'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 5 of Notes to Consolidated Financial Statements in Item 1 of this Form 10-Q for a discussion of the Company's collateral requirements specific to the Company's derivative contracts.

In accordance with MEHC's equity commitment agreement related to Topaz, if MEHC does not maintain at least an investment grade credit rating from at least two of the three credit ratings agencies, MEHC's obligations under the equity commitment agreement would be supported by cash collateral or a letter of credit issued by a financial institution that meets certain minimum criteria specified in the financing documents. Upon reaching the final commercial operation date of the Topaz Project, MEHC will have no further obligation to make any equity contribution and any unused equity contribution obligations will be canceled.

In July 2010, the President signed into law the Dodd-Frank Reform Act. The Dodd-Frank Reform Act reshapes financial regulation in the United States by creating new regulators, regulating new markets and firms, and providing new enforcement powers to regulators. Virtually all major areas of the Dodd-Frank Reform Act, including collateral requirements on derivative contracts, are the subject of regulatory interpretation and implementation rules requiring rulemaking proceedings, some of which have been completed and others that are expected to be finalized in 2012.

The Company is a party to derivative contracts, including over-the-counter derivative contracts. The Dodd-Frank Reform Act provides for extensive new regulation of over-the-counter derivative contracts and certain market participants, including imposition of mandatory clearing, exchange trading, capital and margin requirements for "swap dealers" and "major swap participants." The Dodd-Frank Reform Act provides certain exemptions from these regulations for commercial end-users that use derivatives to hedge and manage the commercial risk of their businesses. Although the Company generally does not enter into over-the-counter derivative contracts for purposes unrelated to hedging of commercial risk and does not believe it will be considered a swap dealer or major swap participant, the outcome of the rulemaking proceedings cannot be predicted and, therefore, the impact of the Dodd-Frank Reform Act on the Company's consolidated financial results cannot be determined at this time.

New Accounting Pronouncements

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

Critical Accounting Estimates

Certain accounting measurements require management to make estimates and judgments concerning transactions that will be settled several years in the future. Amounts recognized on the Consolidated Financial Statements based on such estimates involve numerous assumptions subject to varying and potentially significant degrees of judgment and uncertainty and will likely change in the future as additional information becomes available. Estimates are used for, but not limited to, the accounting for the effects of certain types of regulation, derivatives, impairment of long-lived assets and goodwill, pension and other postretirement benefits, income taxes and revenue recognition - unbilled revenue. For additional discussion of the Company's critical accounting estimates, see Item 7 of the Company's Annual Report on Form 10-K for the year ended December 31, 2011. There have been no significant changes in the Company's assumptions regarding critical accounting estimates since December 31, 2011.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

For quantitative and qualitative disclosures about market risk affecting the Company, see Item 7A of the Company's Annual Report on Form 10-K for the year ended December 31, 2011. The Company's exposure to market risk and its management of such risk has not changed materially since December 31, 2011. Refer to Note 5 of Notes to Consolidated Financial Statements in Item 1 of this Form 10-Q for disclosure of the Company's derivative positions as of March 31, 2012.

Item 4. Controls and Procedures

At the end of the period covered by this Quarterly Report on Form 10-Q, the Company 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 March 31, 2012 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 the Company's risk factors from those disclosed in Item 1A of the Company's Annual Report on Form 10-K for the year ended December 31, 2011.

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

Information regarding the Company's mine safety violations and other legal matters disclosed in accordance with Section 1503(a) of the Dodd-Frank Reform Act is included in Exhibit 95 to this Form 10-Q.

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, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	MIDAMERICAN ENERGY HOLDINGS COMPANY
	(Registrant)
Date: May 4, 2012	/s/ Patrick J. Goodman
	Patrick J. Goodman
	Executive Vice President and Chief Financial Officer
	(principal financial and accounting officer)

39

EXHIBIT INDEX

Exhibit No. Description

15 Awareness Letter of Independent Registered Public Accounting Firm.

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

31.2 Principal Financial 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 Financial Officer Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

95 Mine Safety Disclosures Required by the Dodd-Frank Wall Street Reform and Consumer Protection Act.

101 The following financial information from MidAmerican Energy Holdings Company's Quarterly Report on Form 10-Q for the quarter ended March 31, 2012, 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 as blocks of text.

40

EX-15

EXHIBIT 15

AWARENESS LETTER OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

MidAmerican Energy Holdings Company

Des Moines, Iowa

We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited consolidated interim financial information of MidAmerican Energy Holdings Company and subsidiaries for the periods ended March 31, 2012 and 2011, as indicated in our report dated May 4, 2012; 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 March 31, 2012, is incorporated by reference in Registration Statement No. 333-147957 on Form S-8.

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

May 4, 2012

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Gregory E. Abel, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Energy Holdings 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: May 4, 2012	/s/ Gregory E. Abel
	Gregory E. Abel
	Chairman, 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, Patrick J. Goodman, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of MidAmerican Energy Holdings 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: May 4, 2012	/s/ Patrick J. Goodman
	Patrick J. Goodman
	Executive Vice President and Chief Financial Officer
	(principal financial officer)

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

SECTION 906 OF THE

SARBANES-OXLEY ACT OF 2002

I, Gregory E. Abel, Chairman, President and Chief Executive Officer of MidAmerican Energy Holdings 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 March 31, 2012 (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: May 4, 2012	/s/ Gregory E. Abel
	Gregory E. Abel
	Chairman, 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, Patrick J. Goodman, Executive Vice President and Chief Financial Officer of MidAmerican Energy Holdings 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 March 31, 2012 (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: May 4, 2012	/s/ Patrick J. Goodman
	Patrick J. Goodman
	Executive Vice President and Chief Financial Officer
	(principal financial officer)

EX-95

EXHIBIT 95

MINE SAFETY VIOLATIONS AND OTHER LEGAL MATTER DISCLOSURES

PURSUANT TO SECTION 1503(a) OF THE DODD-FRANK WALL STREET

REFORM AND CONSUMER PROTECTION ACT

PacifiCorp and its subsidiaries operate certain coal mines and coal processing facilities (collectively, the "mining facilities") that are regulated by the Federal Mine Safety and Health Administration ("MSHA") under the Federal Mine Safety and Health Act of 1977 (the "Mine Safety Act"). MSHA inspects PacifiCorp's mining facilities on a regular basis. The total number of reportable Mine Safety Act citations, orders, assessments and legal actions for the three-month period endedMarch 31, 2012 are summarized in the table below and are subject to contest and appeal. The severity and assessment of penalties may be reduced or, in some cases, dismissed through the contest and appeal process. Amounts are reported regardless of whether PacifiCorp has challenged or appealed the matter. Coal reserves that are not yet mined and mines that are closed or idled are not included in the information below as no reportable events occurred at those locations during the three-month period endedMarch 31, 2012. There were no mining-related fatalities during the three-month period endedMarch 31, 2012.

	Mine Safety Act					Legal Actions
				Total
			Section	Value of
	Section 104	Section	107(a)	Proposed
	Significant and	104(d)	Imminent	MSHA			Instituted	Closed
	Substantial	Citations/	Danger	Assessments			During	During
Mining Facilities	Citations(1)	Orders(2)	Orders(3)	(in thousands)		Pending(4)	Period	Period
Deer Creek	1	—	—	$	15	9	1	4
Bridger (surface)	—	—	—	—		1	—	3
Bridger (underground)	11	2	1	17		16	4	5
Cottonwood Preparatory Plant	—	—	—	—		—	—	—
Wyodak Coal Crushing Facility	—	—	—	—		—	—	—

(1) Citations for alleged violations of mandatory health and safety standards that could significantly or substantially contribute to the cause and effect of a safety or health hazard under Section 104 of the Mine Safety Act.

(2) For an alleged unwarrantable failure (i.e., aggravated conduct constituting more than ordinary negligence) to comply with a mining safety standard or regulation.

(3) For the existence of any condition or practice in a coal or other mine which could reasonably be expected to cause death or serious physical harm before such condition or practice can be abated. On March 20, 2012, Bridger received an imminent danger order under Section 107(a) of the Mine Safety Act at its underground mine located near Rock Springs, Wyoming. The order was reconsidered and subsequently vacated by MSHA.

(4) Amounts are as of March 31, 2012 and (a) include contests of proposed penalties under Subpart C of the Federal Mine Safety and Health Review Commission's procedural rules and (b) are not exclusive to citations, notices, orders and penalties assessed by MSHA during the reporting period.

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General

3 Months Ended

Mar. 31, 2012

General [Abstract]

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

(1) General

MidAmerican Energy Holdings Company ("MEHC") is a holding company that owns subsidiaries principally engaged in energy businesses (collectively with its subsidiaries, the "Company"). MEHC is a consolidated subsidiary of Berkshire Hathaway Inc. ("Berkshire Hathaway").

The Company's operations are organized and managed as eight distinct platforms: PacifiCorp, MidAmerican Funding, LLC ("MidAmerican Funding") (which primarily consists of MidAmerican Energy Company ("MidAmerican Energy")), Northern Natural Gas Company ("Northern Natural Gas"), Kern River Gas Transmission Company ("Kern River"), Northern Powergrid Holdings Company ("Northern Powergrid Holdings") (which primarily consists of Northern Powergrid (Northeast) Limited and Northern Powergrid (Yorkshire) plc), CalEnergy Philippines (which owns a majority interest in the Casecnan project in the Philippines), MidAmerican Renewables, LLC (which owns interests in independent power projects in the United States), and HomeServices of America, Inc. (collectively with its subsidiaries, "HomeServices"). Through these platforms, the Company owns and operates an electric utility company in the Western United States, an electric and natural gas utility company in the Midwestern United States, two interstate natural gas pipeline companies in the United States, two electricity distribution companies in Great Britain, a diversified portfolio of independent power projects and the second largest residential real estate brokerage firm in the United States. Northern Natural Gas and Kern River have been aggregated in the reportable segment called MidAmerican Energy Pipeline Group, and CalEnergy Philippines and MidAmerican Renewables, LLC have been aggregated in the reportable segment called MidAmerican Renewables.

The unaudited Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and the United States Securities and Exchange Commission's rules and regulations for Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the disclosures required by GAAP for annual financial statements. Management believes the unaudited Consolidated Financial Statements contain all adjustments (consisting only of normal recurring adjustments) considered necessary for the fair presentation of the Consolidated Financial Statements as of March 31, 2012 and for the three-month periods endedMarch 31, 2012 and 2011. The results of operations for the three-month period endedMarch 31, 2012 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 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 the Company's Annual Report on Form 10-K for the year ended December 31, 2011 describes the most significant accounting policies used in the preparation of the Consolidated Financial Statements. There have been no significant changes in the Company's assumptions regarding significant accounting estimates and policies during the three-month period endedMarch 31, 2012.

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Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 379	$ 335
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	351	335
Changes in regulatory assets and liabilities	5	(4)
Deferred income taxes and amortization of investment tax credits	176	60
Other, net	(19)	(3)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	127	88
Derivative collateral, net	93	32
Contributions to pension and other postretirement benefit plans, net	(14)	(35)
Accrued property, income and other taxes	(96)	49
Accounts payable and other liabilities	(70)	(40)
Net cash flows from operating activities	932	817
Cash flows from investing activities:
Capital expenditures	(756)	(551)
Acquisitions, net of cash acquired	(109)	0
Purchases of available-for-sale securities	(50)	(69)
Proceeds from sales of available-for-sale securities	46	73
Equity method investments	(163)	(11)
Increase in restricted cash and investments	(448)	(8)
Other, net	9	6
Net cash flows from investing activities	(1,471)	(560)
Cash flows from financing activities:
Proceeds from subsidiary debt	1,599	191
Repayments of subsidiary debt	(114)	(224)
Repayments of MEHC subordinated debt	(22)	0
Net (repayments of) proceeds from short-term debt	(795)	217
Other, net	(34)	(11)
Net cash flows from financing activities	634	173
Effect of exchange rate changes	1	(1)
Net change in cash and cash equivalents	96	429
Cash and cash equivalents at beginning of period	286	470
Cash and cash equivalents at end of period	$ 382	$ 899

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Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 382	$ 286
Trade receivables, net	1,186	1,270
Income taxes receivable	552	456
Inventories	694	690
Other current assets	645	581
Total current assets	3,459	3,283
Property, plant and equipment, net	34,828	34,167
Goodwill	5,039	4,996
Investments and restricted cash and investments	2,676	1,948
Regulatory assets	2,841	2,835
Other assets	524	489
Total assets	49,367	47,718
Current liabilities:
Accounts payable	874	989
Accrued employee expenses	223	155
Accrued interest	327	326
Accrued property, income and other taxes	365	340
Derivative contracts	263	160
Short-term debt	98	865
Current portion of long-term debt	1,456	1,198
Other current liabilities	549	514
Total current liabilities	4,155	4,547
Regulatory liabilities	1,696	1,663
MEHC senior debt	4,621	4,621
Subsidiary debt	14,523	13,253
Deferred income taxes	7,272	7,076
Other long-term liabilities	2,310	2,293
Total liabilities	34,577	33,453
Commitments and contingencies (Note 10)
MEHC shareholders' equity:
Common stock - 115 shares authorized, no par value, 75 shares issued and outstanding	0	0
Additional paid-in capital	5,423	5,423
Retained earnings	9,685	9,310
Accumulated other comprehensive loss, net	(487)	(641)
Total MEHC shareholders' equity	14,621	14,092
Noncontrolling interests	169	173
Total equity	14,790	14,265
Total liabilities and equity	$ 49,367	$ 47,718

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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Unrecognized amounts on retirement benefits, tax	$ (2)	$ (2)
Unrealized gains (losses) on available-for-sale securities, tax	59	(127)
Unrealized (losses) gains on cash flow hedges, tax	$ (11)	$ 1

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Consolidated Statements of Changes in Equity (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss, Net [Member]	Noncontrolling Interests [Member]
Balance at Dec. 31, 2010	$ 13,408	$ 0	$ 5,427	$ 7,979	$ (174)	$ 176
Balance (shares) at Dec. 31, 2010		75
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	335			331		4
Other comprehensive income (loss)	(117)				(117)	0
Distributions	(6)					(6)
Other equity transactions	(3)	0	(3)	0	0	0
Balance at Mar. 31, 2011	13,617	0	5,424	8,310	(291)	174
Balance (shares) at Mar. 31, 2011		75
Balance at Dec. 31, 2011	14,265	0	5,423	9,310	(641)	173
Balance (shares) at Dec. 31, 2011	75	75
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	379			375		4
Other comprehensive income (loss)	154				154	0
Distributions	(8)					(8)
Balance at Mar. 31, 2012	$ 14,790	$ 0	$ 5,423	$ 9,685	$ (487)	$ 169
Balance (shares) at Mar. 31, 2012	75	75

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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
MEHC shareholders' equity:
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	115	115
Common stock, shares issued	75	75
Common stock, shares outstanding	75	75

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Income Taxes

3 Months Ended

Mar. 31, 2012

Income Taxes [Abstract]

Income Tax Disclosure [Text Block]

(9) Income Taxes

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

	Three-Month Periods
	Ended March 31,
	2012		2011
Federal statutory income tax rate	35	%	35	%
Federal and state income tax credits	(10	)	(9	)
State income tax, net of federal income tax benefit	3		1
Income tax effect of foreign income	(3	)	(2	)
Effects of ratemaking	(2	)	(1	)
Other, net	(1	)	1
Effective income tax rate	22	%	25	%

Federal and state income tax credits primarily relate to production tax credits at the Utilities. The Utilities' wind-powered generating facilities are eligible for federal renewable electricity production tax credits for 10 years from the date the facilities were placed in service.

Berkshire Hathaway includes the Company in its United States federal income tax return. As of March 31, 2012 and December 31, 2011, income taxes receivable from Berkshire Hathaway totaled $552 million and $456 million, respectively.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2012	Apr. 30, 2012
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Registrant Name	MIDAMERICAN ENERGY HOLDINGS CO /NEW/
Entity Central Index Key	0001081316
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		74,609,001

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2012

Commitments and Contingencies [Abstract]

Commitments Contingencies and Guarantees [Text Block]

(10) Commitments and Contingencies

Environmental Laws and Regulations

The Company is subject to federal, state, local and foreign laws and regulations regarding air and water quality, renewable portfolio standards, 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 the Company's current and future operations. The Company believes it is in material compliance with all applicable laws and regulations.

Hydroelectric Relicensing

PacifiCorp's hydroelectric portfolio consists of 44 generating facilities with an aggregate facility net owned capacity of 1,145 megawatts. The Federal Energy Regulatory Commission ("FERC") regulates 98% of the net capacity of this portfolio through 15 individual licenses, which have terms of 30 to 50 years. PacifiCorp expects to incur ongoing operating and maintenance expense and capital expenditures associated with the terms of its renewed hydroelectric licenses and settlement agreements, including natural resource enhancements. PacifiCorp's Klamath hydroelectric system is currently operating under annual licenses. Substantially all of PacifiCorp's remaining hydroelectric generating facilities are operating under licenses that expire between 2030 and 2058.

In February 2010, PacifiCorp, the United States Department of the Interior, the United States Department of Commerce, the State of California, the State of Oregon and various other governmental and non-governmental settlement parties signed the Klamath Hydroelectric Settlement Agreement ("KHSA"). Among other things, the KHSA provides that the United States Department of the Interior conduct scientific and engineering studies to assess whether removal of the Klamath hydroelectric system's four mainstem dams is in the public interest and will advance restoration of the Klamath Basin's salmonid fisheries. If it is determined that dam removal should proceed, dam removal is expected to commence no earlier than 2020.

Under the KHSA, PacifiCorp and its customers are protected from uncapped dam removal costs and liabilities. For dam removal to occur, federal legislation consistent with the KHSA must be enacted to provide, among other things, protection for PacifiCorp from all liabilities associated with dam removal activities. If Congress does not enact legislation, then PacifiCorp will resume relicensing at the FERC. In November 2011, bills were introduced in both chambers of the United States Congress that, if passed, would enact the KHSA and a companion agreement that seeks to resolve other water-related conflicts and restore habitat in the Klamath basin.

In addition, the KHSA limits PacifiCorp's contribution to dam removal costs to no more than $200 million, of which up to $184 million would be collected from PacifiCorp's Oregon customers with the remainder to be collected from PacifiCorp's California customers. An additional $250 million for dam removal costs is expected to be raised through a California bond measure or other appropriate State of California financing mechanism. If dam removal costs exceed $200 million and if the State of California is unable to raise the additional funds necessary for dam removal costs, sufficient funds would need to be provided by an entity other than PacifiCorp in order for the KHSA and dam removal to proceed.

PacifiCorp has begun collection of surcharges from Oregon customers for their share of dam removal costs, as approved by the Oregon Public Utility Commission ("OPUC"), and is depositing the proceeds in a trust account maintained by the OPUC. PacifiCorp has begun collection of surcharges from California customers for their share of dam removal costs, as approved by the California Public Utilities Commission ("CPUC"), and is depositing the proceeds into two trust accounts maintained by the CPUC. PacifiCorp is authorized to collect the surcharges through 2019.

As of March 31, 2012, PacifiCorp's property, plant and equipment, net included $123 million of costs associated with the Klamath hydroelectric system's four mainstem dams and the associated relicensing and settlement costs. PacifiCorp has received approvals from the OPUC, the CPUC and the Wyoming Public Service Commission to depreciate the Klamath hydroelectric system's four mainstem dams and the associated relicensing and settlement costs through the expected dam removal date. The depreciation rate changes were effective January 1, 2011 and will allow for full depreciation of the assets by December 2019 for those jurisdictions. PacifiCorp filed for consistent ratemaking treatment in the last Idaho general rate case, which was settled in January 2012 without a decision on this matter. PacifiCorp expects to seek similar approval in Washington. As part of the July 2011 Utah general rate case settlement that was approved by the Utah Public Service Commission in August 2011, PacifiCorp and the other parties to the settlement agreed to defer a decision regarding the acceleration of the depreciation rates for the Klamath hydroelectric system's four mainstem dams to a future rate proceeding, at which time Utah's $34 million share of associated relicensing and settlement costs would be addressed. In the 2012 Utah general rate case, PacifiCorp has requested approval for Utah's share of accelerated depreciation of the Klamath hydroelectric system's four mainstem dams and associated relicensing and settlement costs. This proceeding is currently ongoing.

Legal Matters

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

Guarantees

The Company has entered into guarantees as part of the normal course of business and the sale of certain assets. These guarantees are not expected to have a material impact on the Company's consolidated financial results.

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Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating revenue:
Energy	$ 2,638	$ 2,655
Real estate	209	189
Total operating revenue	2,847	2,844
Energy:
Cost of sales	942	972
Operating expense	626	635
Depreciation and amortization	348	332
Real estate	215	201
Total operating costs and expenses	2,131	2,140
Operating income	716	704
Other income (expense):
Interest expense	(290)	(303)
Capitalized interest	9	9
Interest and dividend income	3	3
Other, net	33	26
Total other income (expense)	(245)	(265)
Income before income tax expense and equity income	471	439
Income tax expense	104	111
Equity income	12	7
Net income	379	335
Net income attributable to noncontrolling interests	4	4
Net income attributable to MEHC	$ 375	$ 331

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Fair Value Measurements

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Fair Value Disclosures [Text Block]

(4) Fair Value Measurements

The carrying value of the Company'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. The Company has various financial assets and liabilities that are measured at fair value on the Consolidated 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 the Company 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 the Company's judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Company develops these inputs based on the best information available, including its own data.

The following table presents the Company's assets and liabilities recognized on the Consolidated 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 March 31, 2012
Assets:
Commodity derivatives	$	3		$	183		$	32		$	(164	)	$	54
Money market mutual funds(2)	657			—			—			—			657
Debt securities:
United States government obligations	90			—			—			—			90
International government obligations	—			1			—			—			1
Corporate obligations	—			31			—			—			31
Municipal obligations	—			11			—			—			11
Agency, asset and mortgage-backed obligations	—			7			—			—			7
Auction rate securities	—			—			36			—			36
Equity securities:
United States companies	186			—			—			—			186
International companies	631			—			—			—			631
Investment funds	68			—			—			—			68
	$	1,635		$	233		$	68		$	(164	)	$	1,772
Liabilities - commodity derivatives	$	(31	)	$	(664	)	$	(7	)	$	230		$	(472	)

	Input Levels for Fair Value Measurements
	Level 1			Level 2			Level 3			Other(1)			Total
As of December 31, 2011
Assets:
Commodity derivatives	$	1		$	166		$	27		$	(147	)	$	47
Money market mutual funds(2)	164			—			—			—			164
Debt securities:
United States government obligations	89			—			—			—			89
International government obligations	—			1			—			—			1
Corporate obligations	—			30			—			—			30
Municipal obligations	—			12			—			—			12
Agency, asset and mortgage-backed obligations	—			7			—			—			7
Auction rate securities	—			—			35			—			35
Equity securities:
United States companies	166			—			—			—			166
International companies	489			—			—			—			489
Investment funds	64			—			—			—			64
	$	973		$	216		$	62		$	(147	)	$	1,104
Liabilities - commodity derivatives	$	(37	)	$	(598	)	$	(4	)	$	303		$	(336	)

(1) Represents netting under master netting arrangements and a net cash collateral receivable of $66 million and $156 million as of March 31, 2012 and December 31, 2011, respectively.

(2) Amounts are included in cash and cash equivalents; current investments and restricted cash and investments; and noncurrent investments and restricted cash and investments on the Consolidated Balance Sheets. The fair value of these money market mutual funds approximates cost.

Derivative contracts are recorded on the Consolidated Balance Sheets as either assets or liabilities and are stated at 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 the Company transacts. When quoted prices for identical contracts are not available, the Company uses forward price curves. Forward price curves represent the Company's estimates of the prices at which a buyer or seller could contract today for delivery or settlement at future dates. The Company 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 the Company. Market price quotations for certain major electricity and natural gas trading hubs are generally readily obtainable for the applicable term of the Company's outstanding derivative contracts; therefore, the Company's forward price curves for those locations and periods reflect observable market quotes. Market price quotations for other 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, the Company 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, currency rates, related volatility, counterparty creditworthiness and duration of contracts. Refer to Note 5 for further discussion regarding the Company's risk management and hedging activities.

The Company's investments in money market mutual funds and debt and equity securities are accounted for as available-for-sale securities and are stated at fair value. When available, a readily observable quoted market price or net asset value of an identical security in an active market is used to record the fair value. In the absence of a quoted market price or net asset value of an identical security, the fair value is determined using pricing models or net asset values based on observable market inputs and quoted market prices of securities with similar characteristics. The fair value of the Company'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 the Company'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 the Company's assets and liabilities measured at fair value on a recurring basis using significant Level 3 inputs (in millions):

	Three-Month Period
	Ended March 31,
	Commodity			Auction Rate
	Derivatives			Securities
2012
Beginning balance	$	23		$	35
Changes included in earnings(1)	10			—
Changes in fair value recognized in other comprehensive income	(3		)	2
Changes in fair value recognized in net regulatory assets	9			—
Sales	—			(1		)
Settlements	(14		)	—
Ending balance	$	25		$	36

2011
Beginning balance	$	(331	)	$	50
Changes included in earnings(1)	2			—
Changes in fair value recognized in other comprehensive income	—			2
Changes in fair value recognized in net regulatory assets	(13		)	—
Sales	—			(13		)
Settlements	1			—
Ending balance	$	(341	)	$	39

(1) Changes included in earnings are reported as operating revenue on the Consolidated Statements of Operations. For commodity derivatives held as of March 31, 2012 and 2011, net unrealized gains (losses) included in earnings for the three-month periods endedMarch 31, 2012 and 2011 totaled $7 million and $(1) million, respectively.

The Company's long-term debt is carried at cost on the Consolidated Financial Statements. The fair value of the Company'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 the Company'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 the Company's long-term debt (in millions):

	As of March 31, 2012				As of December 31, 2011
	Carrying		Fair		Carrying		Fair
	Value		Value		Value		Value
Long-term debt	$	20,600	$	23,791	$	19,072	$	23,327

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Property, Plant and Equipment, Net

3 Months Ended

Mar. 31, 2012

Property, Plant and Equipment, Net [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

(3) Property, Plant and Equipment, Net

Property, plant and equipment, net consists of the following (in millions):

		As of
	Depreciable	March 31,			December 31,
	Life	2012			2011
Regulated assets:
Utility generation, distribution and transmission system	5-80 years	$	40,608		$	40,180
Interstate pipeline assets	3-80 years	6,253			6,245
		46,861			46,425
Accumulated depreciation and amortization		(14,643		)	(14,390		)
Regulated assets, net		32,218			32,035
Nonregulated assets:
Independent power plants	5-30 years	677			677
Other assets	3-30 years	437			429
		1,114			1,106
Accumulated depreciation and amortization		(549		)	(533		)
Nonregulated assets, net		565			573
Net operating assets		32,783			32,608
Construction work-in-progress		2,045			1,559
Property, plant and equipment, net		$	34,828		$	34,167

Construction work-in-progress includes $1.8 billion and $1.6 billion as of March 31, 2012 and December 31, 2011, respectively, related to the construction of regulated assets.

The Company completed various acquisitions totaling $109 million during the three-month period ended March 31, 2012. The purchase price for each acquisition was allocated to the assets acquired, which relate primarily to development and construction costs for the 550-megawatt Topaz solar project ("Topaz Project") and the 81-megawatt Bishop Hill II wind-powered generation project. There were no material liabilities assumed.

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Components of Accumulated Other Comprehensive Loss, Net

3 Months Ended

Mar. 31, 2012

Components of Accumulated Other Comprehensive Income, Net [Abstract]

Comprehensive Income Note [Text Block]

(11) Components of Accumulated Other Comprehensive Loss, Net

The following table shows the change in accumulated other comprehensive loss attributable to MEHC by each component of other comprehensive income, net of applicable income taxes, for the three-month period endedMarch 31, 2012 (in millions):

							Unrealized					Accumulated
	Unrecognized			Foreign			Gains on		Unrealized			Other
	Amounts on			Currency			Available-		Gains on			Comprehensive
	Retirement			Translation			For-Sale		Cash Flow			Loss Attributable
	Benefits			Adjustment			Securities		Hedges			To MEHC, Net
Balance, December 31, 2011	$	(491	)	$	(307	)	$	142	$	15		$	(641	)
Other comprehensive (loss) income	(5		)	85			89		(15		)	154
Balance, March 31, 2012	$	(496	)	$	(222	)	$	231	$	—		$	(487	)

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Recent Financing Transactions

3 Months Ended

Mar. 31, 2012

Recent Debt Transactions [Abstract]

Debt Disclosure [Text Block]

(7) Recent Financing Transactions

In January 2012, PacifiCorp issued $350 million of its 2.95% First Mortgage Bonds due February 1, 2022 and $300 million of its 4.10% First Mortgage Bonds due February 1, 2042. The net proceeds were used to repay short-term debt, fund capital expenditures and for general corporate purposes. In March 2012, PacifiCorp issued an additional $100 million of its 2.95% First Mortgage Bonds due February 1, 2022. The net proceeds were used to redeem $84 million of tax-exempt bond obligations prior-to-scheduled maturity with a weighted average interest rate of 5.7%, repay short-term debt and for general corporate purposes.

In February 2012, Topaz Solar Farms, LLC ("Topaz") issued $850 million of the 5.75% Series A Senior Secured Notes. The principal of the notes amortize beginning September 2015 with a final maturity in September 2039. The net proceeds will be used to fund the costs and expenses related to the development, construction and financing of the Topaz Project. Any unused amounts will be invested or, in certain circumstances, loaned to MEHC. As of March 31, 2012, $296 million was loaned to MEHC.

In connection with its offering, Topaz entered into a letter of credit and reimbursement facility in an aggregate principal amount of $345 million. Letters of credit issued under the letter of credit facility will be used to (a) provide security under the power purchase agreement and large generator interconnection agreements, (b) fund the debt service reserve requirement and the operation and maintenance debt service reserve requirement, (c) provide security for our remediation and mitigation liabilities, and (d) provide security in respect of our conditional use permit sales tax obligations. As of March 31, 2012, Topaz had $28 million of letters of credit issued under this facility.

Pursuant to an equity funding and contribution agreement, MEHC has committed to provide Agua Caliente with funding for (a) base equity contributions of up to an aggregative amount of $303 million for the construction of the project, and (b) transmission upgrade costs. In January 2012, MEHC entered into a $303 million letter of credit facility related to its funding commitments. The equity funding and contribution agreement and the letter of credit commitment decreases as equity is contributed to the Agua Caliente Project. As of March 31, 2012, the balance of the commitment was $273 million.

Additionally, during the three-month period endedMarch 31, 2012, MEHC issued letters of credit totaling $31 million, of which $30 million were issued under its existing unsecured credit facility, to support the construction of renewable generation projects acquired in 2012. Additionally, PacifiCorp issued letters of credit totaling $135 million under its existing unsecured credit facilities as collateral for commodity derivative agreements.

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Risk Management and Hedging Activities

3 Months Ended

Mar. 31, 2012

Risk Management and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities Disclosure [Text Block]

(5) Risk Management and Hedging Activities

The Company is exposed to the impact of market fluctuations in commodity prices, interest rates and foreign currency exchange rates. The Company is principally exposed to electricity, natural gas, coal and fuel oil commodity price risk primarily through MEHC's ownership of the Utilities as they have an obligation to serve retail customer load in their regulated service territories. MidAmerican Energy also provides nonregulated retail electricity and natural gas services in competitive markets. The Utilities' 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. Additionally, the Company is exposed to foreign currency exchange rate risk from its business operations and investments in Great Britain. The Company does not engage in a material amount of proprietary trading activities.

Each of the Company's business platforms 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, the Company 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. The Company 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, the Company may from time to time enter into interest rate derivative contracts, such as interest rate swaps or locks, to mitigate the Company's exposure to interest rate risk. The Company does not hedge all of its commodity price, interest rate and foreign currency exchange rate risks, thereby exposing the unhedged portion to changes in market prices.

There have been no significant changes in the Company's accounting policies related to derivatives. Refer to Note 4 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 the Company's derivative contracts, on a gross basis, and reconciles those amounts to the amounts presented on a net basis on the Consolidated Balance Sheets (in millions):

							Derivative
	Other						Contracts -			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total
As of March 31, 2012
Not designated as hedging contracts(1):
Commodity assets	$	104		$	8		$	88		$	14		$	214
Commodity liabilities	(50		)	(3		)	(363		)	(212		)	(628		)
Total	54			5			(275		)	(198		)	(414		)
Designated as hedging contracts:
Commodity assets	—			—			1			3			4
Commodity liabilities	(2		)	—			(49		)	(23		)	(74		)
Total	(2		)	—			(48		)	(20		)	(70		)
Total derivatives	52			5			(323		)	(218		)	(484		)
Cash collateral (payable) receivable	(3		)	—			60			9			66
Total derivatives - net basis	$	49		$	5		$	(263	)	$	(209	)	$	(418	)

							Derivative
	Other						Contracts -			Other
	Current			Other			Current			Long-term
	Assets			Assets			Liabilities			Liabilities			Total
As of December 31, 2011
Not designated as hedging contracts(1):
Commodity assets	$	93		$	14		$	73		$	13		$	193
Commodity liabilities	(47		)	(5		)	(324		)	(216		)	(592		)
Total	46			9			(251		)	(203		)	(399		)
Designated as hedging contracts:
Commodity assets	—			—			1			—			1
Commodity liabilities	(6		)	—			(24		)	(17		)	(47		)
Total	(6		)	—			(23		)	(17		)	(46		)
Total derivatives	40			9			(274		)	(220		)	(445		)
Cash collateral (payable) receivable	(2		)	—			114			44			156
Total derivatives - net basis	$	38		$	9		$	(160	)	$	(176	)	$	(289	)

(1) The Company's commodity derivatives not designated as hedging contracts are generally included in regulated rates, and as of March 31, 2012 and December 31, 2011, a net regulatory asset of $415 million and $400 million, respectively, was recorded related to the net derivative liability of $414 million and $399 million, respectively.

Not Designated as Hedging Contracts

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

	Three-Month Periods
	Ended March 31,
	2012			2011
Beginning balance	$	400		$	564
Changes in fair value recognized in net regulatory assets	70			(22		)
Net gains reclassified to operating revenue	29			8
Net losses reclassified to cost of sales	(84		)	(7		)
Ending balance	$	415		$	543

Designated as Hedging Contracts

The Company uses derivative contracts accounted for as cash flow hedges to hedge electricity and natural gas commodity prices for delivery to nonregulated customers, spring operational sales, natural gas storage and other transactions.

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

	Three-Month Periods
	Ended March 31,
	2012			2011
Beginning balance(1)	$	46		$	37
Changes in fair value recognized in OCI	38			2
Net losses reclassified to cost of sales	(13		)	(5		)
Ending balance(1)	$	71		$	34

(1) Certain derivative contracts, principally interest rate locks, have settled and the fair value at the date of settlement remains in accumulated other comprehensive income ("AOCI") and is recognized in earnings when the forecasted transactions impact earnings.

Realized gains and losses on hedges and hedge ineffectiveness are recognized in income as operating revenue, cost of sales, operating expense or interest expense depending upon the nature of the item being hedged. For the three-month periods endedMarch 31, 2012 and 2011, hedge ineffectiveness was insignificant. As of March 31, 2012, the Company had cash flow hedges with expiration dates extending through December 2016 and $46 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	March 31,	December 31,
	Measure	2012	2011
Electricity purchases	Megawatt hours	10	6
Natural gas purchases	Decatherms	152	183
Fuel purchases	Gallons	14	19

Credit Risk

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

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

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

Collateral and Contingent Features

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

The aggregate fair value of the Company's derivative contracts in liability positions with specific credit-risk-related contingent features totaled $620 million and $571 million as of March 31, 2012 and December 31, 2011, respectively, for which the Company had posted collateral of $176 million and $125 million, respectively, in the form of cash deposits and letters of credit. If all credit-risk-related contingent features for derivative contracts in liability positions had been triggered as of March 31, 2012 and December 31, 2011, the Company would have been required to post $259 million and $332 million, respectively, of additional collateral. The Company'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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Investments and Restricted Cash and Investments

3 Months Ended

Mar. 31, 2012

Investments and Restricted Cash and Investments [Abstract]

Investments and Restricted Cash and Investments [Text Block]

(6) Investments and Restricted Cash and Investments

Investments and restricted cash and investments consists of the following (in millions):

	As of
	March 31,			December 31,
	2012			2011
Investments:
BYD common stock	$	629		$	488
Rabbi trusts	304			290
Other	100			99
Total investments	1,033			877
Equity method investments:
CE Generation, LLC	253			255
Electric Transmission Texas, LLC	251			221
Bridger Coal Company	195			204
Agua Caliente Solar, LLC	95			—
Other	56			52
Total equity method investments	850			732
Restricted cash and investments:
Nuclear decommissioning trust funds	329			308
Other	530			82
Total restricted cash and investments	859			390
Total investments and restricted cash and investments	2,742			1,999
Less current portion	(66		)	(51		)
Noncurrent portion	$	2,676		$	1,948

Investments

MEHC's investment in BYD Company Limited common stock is accounted for as an available-for-sale security with changes in fair value recognized in AOCI. As of March 31, 2012 and December 31, 2011, the fair value of MEHC's investment in BYD Company Limited common stock was $629 million and $488 million, respectively, which resulted in a pre-tax unrealized gain of $397 million and $256 million as of March 31, 2012 and December 31, 2011, respectively.

Equity Method Investments

In January 2012, MEHC, through a wholly-owned subsidiary, acquired from NRG Energy, Inc. a 49% equity interest in Agua Caliente Solar, LLC ("Agua Caliente"), the owner of a 290-megawatt solar project in Arizona.

Restricted Cash and Investments

Other restricted cash and investments includes $439 million restricted for construction of the Topaz Project.

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Employee Benefit Plans

3 Months Ended

Mar. 31, 2012

Employee Benefit Plans [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

(8) Employee Benefit Plans

Domestic Operations

Net periodic benefit cost for the domestic pension and other postretirement benefit plans included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Pension:
Service cost	$	6		$	6
Interest cost	24			25
Expected return on plan assets	(29		)	(27		)
Net amortization	10			5
Net periodic benefit cost	$	11		$	9
Other postretirement:
Service cost	$	3		$	2
Interest cost	9			11
Expected return on plan assets	(11		)	(10		)
Net amortization	1			3
Net periodic benefit cost	$	2		$	6

Employer contributions to the domestic pension and other postretirement benefit plans are expected to be $81 million and $9 million, respectively, during 2012. As of March 31, 2012, $20 million and $2 million of contributions had been made to the domestic pension and other postretirement benefit plans, respectively.

Foreign Operations

Net periodic benefit cost for the United Kingdom pension plan included the following components (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Service cost	$	5		$	5
Interest cost	21			23
Expected return on plan assets	(26		)	(29		)
Net amortization	14			9
Net periodic benefit cost	$	14		$	8

Employer contributions to the United Kingdom pension plan are expected to be £50 million during 2012. As of March 31, 2012, £12 million, or $19 million, of contributions had been made to the United Kingdom pension plan.

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Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 379	$ 335
Other comprehensive income (loss), net of tax:
Unrecognized amounts on retirement benefits, net of tax of $(2) and $(2)	(5)	(5)
Foreign currency translation adjustment	85	76
Unrealized gains (losses) on available-for-sale securities, net of tax of $59 and $(127)	89	(189)
Unrealized (losses) gains on cash flow hedges, net of tax of $(11) and $1	(15)	1
Total other comprehensive income (loss), net of tax	154	(117)
Comprehensive income	533	218
Comprehensive income attributable to noncontrolling interests	4	4
Comprehensive income attributable to MEHC	$ 529	$ 214

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New Accounting Pronouncements

3 Months Ended

Mar. 31, 2012

New Accounting Pronouncements [Abstract]

Accounting Changes and Error Corrections [Text Block]

(2) New Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2011-11, which amends FASB Accounting Standards Codification ("ASC") Topic 210, "Balance Sheet." The amendments in this guidance require an entity to provide quantitative disclosures about offsetting financial instruments and derivative instruments. Additionally, this guidance requires qualitative and quantitative disclosures about master netting agreements or similar agreements when the financial instruments and derivative instruments are not offset. This guidance is effective for fiscal years beginning on or after January 1, 2013, and for interim periods within those fiscal years. The Company is currently evaluating the impact of adopting this guidance on its disclosures included within Notes to Consolidated Financial Statements.

In June 2011, the FASB issued ASU No. 2011-05, which amends FASB ASC Topic 220, "Comprehensive Income." ASU No. 2011-05 provides an entity with the option to present the total of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. Regardless of the option chosen, this guidance also requires presentation of items on the face of the financial statements that are reclassified from other comprehensive income to net income. This guidance does not change the items that must be reported in other comprehensive income, when an item of other comprehensive income must be reclassified to net income or how tax effects of each item of other comprehensive income are presented. This guidance is effective for interim and annual reporting periods beginning after December 15, 2011. In December 2011, the FASB issued ASU No. 2011-12, which also amends FASB ASC Topic 220 to defer indefinitely the ASU No. 2011-05 requirement to present items on the face of the financial statements that are reclassified from other comprehensive income to net income. ASU No. 2011-12 is also effective for interim and annual reporting periods beginning after December 15, 2011. The Company adopted this guidance on January 1, 2012 and elected the two separate but consecutive statements option.

In May 2011, the FASB issued ASU No. 2011-04, which amends FASB ASC Topic 820, "Fair Value Measurements and Disclosures." The amendments in this guidance are not intended to result in a change in current accounting. ASU No. 2011-04 requires additional disclosures relating to fair value measurements categorized within Level 3 of the fair value hierarchy, including quantitative information about unobservable inputs, the valuation process used by the entity and the sensitivity of unobservable input measurements. Additionally, entities are required to disclose the level of the fair value hierarchy for assets and liabilities that are not measured at fair value in the balance sheet, but for which disclosure of the fair value is required. This guidance is effective for interim and annual reporting periods beginning after December 15, 2011. The Company adopted ASU No. 2011-04 on January 1, 2012. The adoption of this guidance did not have a material impact on the Company's disclosures included within Notes to Consolidated Financial Statements.

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Segment Information

3 Months Ended

Mar. 31, 2012

Segment Information [Abstract]

Segment Reporting Disclosure [Text Block]

(12) Segment Information

MEHC's reportable segments were determined based on how the Company's strategic units are managed. Northern Natural Gas and Kern River have been aggregated in the reportable segment called MidAmerican Energy Pipeline Group, and CalEnergy Philippines and MidAmerican Renewables, LLC have been aggregated in the reportable segment called MidAmerican Renewables. Prior year amounts have been changed to conform to the current presentation. The Company's reportable segments with foreign operations include Northern Powergrid Holdings, whose business is principally in Great Britain, and MidAmerican Renewables, whose business includes operations in the Philippines. Intersegment eliminations and adjustments, including the allocation of goodwill, have been made. Information related to the Company's reportable segments is shown below (in millions):

	Three-Month Periods
	Ended March 31,
	2012			2011
Operating revenue:
PacifiCorp	$	1,191		$	1,119
MidAmerican Funding	874			979
MidAmerican Energy Pipeline Group	302			293
Northern Powergrid Holdings	263			252
MidAmerican Renewables	31			32
HomeServices	209			189
MEHC and Other(1)	(23		)	(20		)
Total operating revenue	$	2,847		$	2,844
Depreciation and amortization:
PacifiCorp	$	161		$	155
MidAmerican Funding	93			85
MidAmerican Energy Pipeline Group	48			46
Northern Powergrid Holdings	41			41
MidAmerican Renewables	7			8
HomeServices	3			3
MEHC and Other(1)	(2		)	(3		)
Total depreciation and amortization	$	351		$	335
Operating income:
PacifiCorp	$	281		$	271
MidAmerican Funding	91			113
MidAmerican Energy Pipeline Group	183			177
Northern Powergrid Holdings	157			159
MidAmerican Renewables	17			16
HomeServices	(6		)	(12		)
MEHC and Other(1)	(7		)	(20		)
Total operating income	716			704
Interest expense	(290		)	(303		)
Capitalized interest	9			9
Interest and dividend income	3			3
Other, net	33			26
Total income before income tax expense and equity income	$	471		$	439

	Three-Month Periods
	Ended March 31,
	2012		2011
Interest expense:
PacifiCorp	$	99	$	100
MidAmerican Funding	43		48
MidAmerican Energy Pipeline Group	23		27
Northern Powergrid Holdings	33		39
MidAmerican Renewables	9		5
MEHC and Other(1)	83		84
Total interest expense	$	290	$	303

	As of
	March 31,		December 31,
	2012		2011
Total assets:
PacifiCorp	$	22,538	$	22,364
MidAmerican Funding	12,489		12,430
MidAmerican Energy Pipeline Group	4,858		4,854
Northern Powergrid Holdings	5,932		5,690
MidAmerican Renewables	2,026		890
HomeServices	702		649
MEHC and Other(1)	822		841
Total assets	$	49,367	$	47,718

(1) The remaining differences between the segment amounts and the consolidated amounts described as "MEHC and Other" relate principally to intersegment eliminations for operating revenue and, for the other items presented, to (a) corporate functions, including administrative costs, interest expense, corporate cash and investments and related interest income and (b) intersegment eliminations.

The following table shows the change in the carrying amount of goodwill by reportable segment for the three-month period endedMarch 31, 2012 (in millions):

					MidAmerican
					Energy			Northern
			MidAmerican		Pipeline			Powergrid		MidAmerican		Home-
	PacifiCorp		Funding		Group			Holdings		Renewables		Services		Total
Balance, December 31, 2011	$	1,126	$	2,102	$	205		$	1,097	$	71	$	395	$	4,996
Foreign currency translation	—		—		—			26		—		—		26
Other	—		—		(7		)	—		—		24		17
Balance, March 31, 2012	$	1,126	$	2,102	$	198		$	1,123	$	71	$	419	$	5,039