DTE Energy®

Business and Financial Update for European Investor Meetings

Nick Khouri, Vice President & Treasurer

March 13-14, 2012

Safe Harbor Statement

The information contained herein is as of the date of this presentation. Many factors may impact forward-looking statements including, but not limited to, the following: impact of regulation by the FERC, MPSC, NRC and other applicable governmental proceedings and regulations, including any associated impact on rate structures; the amount and timing of cost recovery allowed as a result of regulatory proceedings, related appeals or new legislation; impact of electric and gas utility restructuring in Michigan, including legislative amendments and Customer Choice programs; economic conditions and population changes in our geographic area resulting in changes in demand, customer conservation, increased thefts of electricity and gas and high levels of uncollectible accounts receivable; environmental issues, laws, regulations, and the increasing costs of remediation and compliance, including actual and potential new federal and state requirements; health, safety, financial, environmental and regulatory risks associated with ownership and operation of nuclear facilities; changes in the cost and availability of coal and other raw materials, purchased power and natural gas; volatility in the short-term natural gas storage markets impacting third-party storage revenues; access to capital markets and the results of other financing efforts which can be affected by credit agency ratings; instability in capital markets which could impact availability of short and long-term financing; the timing and extent of changes in interest rates; the level of borrowings; the potential for losses on investments, including nuclear decommissioning and benefit plan assets and the related increases in future expense and contributions; the potential for increased costs or delays in completion of significant construction projects; the uncertainties of successful exploration of unconventional gas and oil resources and challenges in estimating gas and oil reserves with certainty; changes in and application of federal, state and local tax laws and their interpretations, including the Internal Revenue Code, regulations, rulings, court proceedings and audits; the effects of weather and other natural phenomena on operations and sales to customers, and purchases from suppliers; unplanned outages; the cost of protecting assets against, or damage due to, terrorism or cyber attacks; employee relations and the impact of collective bargaining agreements; the availability, cost, coverage and terms of insurance and stability of insurance providers; cost reduction efforts and the maximization of plant and distribution system performance; the effects of competition; changes in and application of accounting standards and financial reporting regulations; changes in federal or state laws and their interpretation with respect to regulation, energy policy and other business issues; binding arbitration, litigation and related appeals; and the risks discussed in our public filings with the Securities and Exchange Commission. New factors emerge from time to time. We cannot predict what factors may arise or how such factors may cause our results to differ materially from those contained in any forward-looking statement. Any forward-looking statements refer only as of the date on which such statements are made. We undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events. This presentation should also be read in conjunction with the “Forward-Looking Statements” sections in each of DTE Energy’s and Detroit Edison’s 2011 Forms 10-K and 2011 Forms 10-Q (which sections are incorporated herein by reference), and in conjunction with other SEC reports filed by DTE Energy and Detroit Edison.

Cautionary Note – The Securities and Exchange Commission permits oil and gas companies, in their filings with the SEC, to disclose only proved reserves that a company has demonstrated by actual production or conclusive formation tests to be economically and legally producible under existing economic and operating conditions. We use certain terms in this presentation such as “probable reserves” that the SEC’s guidelines strictly prohibit us from including in filings with the SEC. You are urged to consider closely the disclosure in DTE Energy’s 2011 Form 10-K and 2011 Forms 10-Q, File No. 1-11607, available from our offices or from our website at www.dteenergy.com. You can also obtain these Forms from the SEC by accessing its website at www.sec.gov or by calling 1-800-SEC-0330.

2

Overview

Long-Term Growth Update

Financial Update

3

DTE Energy is an Integrated Energy Company

Strong, Stable and Growing Utilities

~80% of DTE Energy’s 2011 Earnings

Detroit Edison

Electric generation and distribution

2.1 million customers

Fully regulated by Michigan Public Service Commission (MPSC)

MichCon

Natural gas distribution

1.2 million customers

Fully regulated by MPSC

Complementary Non-Utility Businesses

~20% of DTE Energy’s 2011 Earnings

Gas Storage & Pipelines

Power & Industrial Projects

Energy Trading

Unconventional Gas Production

4

Profile of Detroit Edison

Service Territory

Detroit

Twelfth largest US electric utility with 2.1 million customers

7,600 square mile service territory centered around Detroit

~$5 billion in revenue, $17 billion in assets

Regulated by the Michigan Public Service Commission (MPSC)

Pumped Storage

8.9%

Gas/Oil

17.3%

Nuclear

10.4%

Coal

63.4%

Generation Capacity by Fuel Type

Total Capacity = 10,425MW

5

Profile of MichCon

Service Territory

Detroit

Tenth largest US natural gas utility with 1.2 million customers

14,700 square mile service territory throughout Michigan

Significant state regulated gas storage capacity benefits customers (~138 Bcf)

~$1.5 billion in revenue, $4 billion in assets

Regulated by the Michigan Public Service Commission (MPSC)

Storage & Transportation ~11%

Gas Sales ~89%

MichCon Gross Margin

6

Profile of Non-Utility Businesses

Gas Storage & Pipelines

Transport and Store Natural Gas

90 Bcf natural gas storage in Michigan 530 miles of interstate pipeline in-service

Power & Industrial Projects

Own and Operate Energy Related Assets

Industrial Energy Services

Renewable Energy Reduced Emissions Fuel

Energy Trading

Provide Strategic Value

Solid earnings and cash contributor

Provides market intelligence and hedging capability

Unconventional Gas Production

Western Barnett Shale Production of Natural Gas and Oil in Texas

87,000 net acres

214 gross producing wells

559 Bcfe reserves (proved and probable)

7

Overview

Long-Term Growth Update

Financial Update

8

DTE Energy Earnings Growth

Targeting 5% - 6% Long-Term Operating EPS Growth From 2012 Guidance Midpoint

DTE Energy Operating Earnings Per Share*

$2.89

$3.30

$3.60

$3.73

Guidance $3.80**

2008A 2009A 2010A 2011A 2012E 2013E 2014E 2015E

CAGR = ~7%

5% - 6% CAGR from 2012 Midpoint

* Reconciliation to GAAP reported earnings included in the appendix

** Midpoint of $3.65 - $3.95 range

9

Michigan Regulatory Structure Supports Growth

Passed comprehensive energy legislation in 2008

File & Use Rates with 6 month self-implementation

Final order in 12 months

Forward-looking test year

Retail access cap

Renewable Portfolio Standard / Energy Efficiency with fixed surcharge

Certificate of Need for large capital projects

Trackers in place that reduce earnings risk

Revenue decoupling

Fuel cost pass through

10

Detroit Edison Investment Profile, 2012 - 2016

Base Infrastructure*

~$4 billion

Investments to ensure reliability of generation fleet and distribution systems

$785 million investment in 2012

Environmental Compliance $1.3 - $1.8 billion

Investments to meet evolving environmental requirements $255 million investment in 2012

Renewable Energy & Energy Efficiency $900 million

Renewable generation to meet Michigan RPS $235 million investment in 2012

* Includes AMI, Ludington expansion and other investments

11

Detroit Edison

Renewable Energy Update

Gratiot Wind Energy

First Spinning Detroit Edison Turbine, Nov. 2011

212 MW project scheduled to be fully operational by March 2012 All 64 (102 MW) Detroit Edison owned turbines constructed and operational

Michigan Thumb Wind Projects

Foundation Construction for Wind Turbine

Construction underway on three wind parks, totaling 110 MW

Targeting completion by end of 2012 $250 million capital investment

12

MichCon Investment Profile, 2012 - 2016

Base Capital $675 million

Strengthen and expand distribution system Transmission pipeline integrity $155 million investment in 2012

Main Renewal $250 million

670 mile main replacement over 10 years ($500 million total capital investment) Plan to file for capital recovery mechanism $40 million investment in 2012

Meter Move out $115 million

Move out ~27,000 meters per year Improves customer service $20 million investment in 2012

13

Gas Storage & Pipeline: Development of Marcellus Shale Provides Future Growth Opportunities

Solid Operating Earnings* Growth

~$100

$57* $57-60

2011A 2012E 2013E 2014E 2015E 2016E

Storage Assets

Pipeline Interests

Bluestone

Millennium Mainline Expansions

Late 2012 and 2013

Expand capacity ~50% to 0.8 Bcf/d Economic to expand to 1.5 Bcf/d

Bluestone Pipeline & Gathering

$280 million investment In-service 2012

Investigating additional lateral & gathering opportunities

* Reconciliation to GAAP reported earnings included in the appendix

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Power & Industrial Projects: Earnings Potential of $125 Million by 2016

Earnings* potential of $125 million by 2016

($millions)

$38*

$45 - $55

~$125

2011A 2012E 2013E 2014E 2015E 2016E

*Reconciliation to GAAP reported earnings included in the appendix

2016 Target

New Project

~$25

Development

Renewable

~$35

Energy

Reduced

~$60

Emissions Fuel

Industrial Energy

~$75

Services

Corporate allocations, ~($70) interest and overheads

15

Power & Industrial Projects

Reduced Emissions Fuel (REF) Overview

REF facility at St. Clair Power Plant

REF facility at Monroe Power Plant

Program Overview

Facilities blend proprietary additives with coal, resulting in reduced mercury and NOx emissions

Demonstrated emissions reductions in excess of 40% mercury and 20% NOx

Qualifies for federal income tax credit* of ~$6.33 per ton in 2011

Host utility retains environmental benefits

*Section 45 (adjusts each year with inflation)

16

Overview

Long-Term Growth Update

Financial Update

17

Continuous Improvement Efforts Offsetting Inflation and Other Costs

Utility Operations and Maintenance Expense*

($ millions)

~$1,900

$1,635

$1,550

~$1,590**

Target

$1,550

~$350

2005 2006 2007 2008 2009 2010 2011 2012E

Utility O&M reduction of $85 million from 2005 to 2012E

*Excludes bad debt expense, energy efficiency and renewable energy

**Includes $40 million of higher storm costs vs. 2010

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Michigan Economy Continues to Show Signs of Improvement

%

14 12 10 8 6 4

Michigan Unemployment Declining*

Dec-09 Jun-10 Dec-10 Jun-11 Dec-11

* Source: Bureau of Labor Statistics

Michigan Auto Production Increasing*

(000’s)

2,000

1,500 1,000 500 0

2009 2010 2011

Chrysler

GM

Ford

* Source: IHS Automotive

Detroit Edison Sales Improving

(Temperature Normal Territory Sales – GWh)

53,770

48,280

49,894

Other

Industrial

Commercial

Residential

2007 2009 2011

2011 includes 1% cumulative reduction (~500GWh) from Energy Efficiency initiatives

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2012 Operating Earnings Guidance*

(millions, except EPS)

2011

Actual*

2012 Guidance*

Detroit Edison $443 $438 - $448

MichCon 110 110 - 115

Gas Storage & Pipelines 57 57 - 60

Unconventional Gas (6) 0

Production

Power & Industrial 38 45 - 55

Projects

Energy Trading 52 30 - 50

Corporate & Other (61) (54)

DTE Energy $633 $626 - $674

Operating EPS $3.73 $3.65 - $3.95

Avg. Shares Outstanding 170 171

* Reconciliation to GAAP reported earnings included in the appendix

2012 Drivers

Full year rate order impact at lower ROE, 2011 one-time tax items and increased earnings from renewable investments

Continued cost control; 2Q rate case filing

Modest incremental earnings from existing projects; more significant growth begins in 2013 from new projects

Targeting monetization

Incremental earnings from REF

Expect performance near historical levels

Primarily lower interest expense

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DTE Energy

2012 Cash Flow Guidance

Cash Flow Summary

(billions)

2011 2012

Actual Guidance

Cash From Operations $2.0 $1.9

Capital Spending (1.5) (1.9)

Free Cash Flow $0.5 $0.0

Asset Sales $0.0 $0.3

Dividends (0.4) (0.4)

Net Cash $0.1 ($0.1)

Debt ($0.1) $0.1

Equity issued for employee benefit programs is considered non-cash and not included in financing activities

2012 Drivers

2012 cash from operations slightly lower than 2011 driven by higher post-retirement contributions and federal tax payments

2012 capital spending driven by $300 million increased non-utility investment

Projecting ~$300 million equity issuance in 2012; focus on internal mechanisms

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DTE Energy

2012 Capital Expenditure Guidance

Capital Expenditures Summary

(millions)

2011 2012

Actual Guidance

Detroit Edison

Operational $688 $785

Environmental 186 255

Renewable Energy 328 235

$1,202 $1,275

MichCon

Operational $155 $155

Main Renewal /

Meter Move-out 25 60

$180 $215

Non-Utility $146 $430

Total $1,528 $1,920

2012 Drivers

Detroit Edison

• Increased operational investment for improved generation and distribution reliability

• Higher environmental capital for scrubbers at Monroe Power Plant

• Gratiot Wind Energy turbines placed in service late 2011

MichCon

• Higher capital for main renewal and meter relocation projects

Non-Utility

• Increased capital investment driven by Bluestone and various Power & Industrial projects

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Strong Balance Sheet Supports Growth

Leverage*

Target 50% - 52%

51% 51% 50%

2010 2011 2012E

Funds from Operations / Debt*

28%

24%

22%

2010 2011 2012E

Target 22% - 4%

A strong balance sheet remains a key priority

Leverage and cash flow metrics within targeted ranges

Refinanced over $1 billion of debt in 2011, generating annual interest savings of over $25 million

Closed on $1.8 billion 5-year credit facilities in October 2011

– $1.4 billion of available liquidity at year-end 2011

*Debt excludes securitization, a portion of MichCon’s short-term debt, and considers 50% of the Trust Preferreds/Junior Subordinated Notes as equity

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Dividend is Well Supported

Dividend Yield (as of March 2012)

6% 5% 4% 3% 2% 1% 0%

4.4%

POM TEG

UIL TE

VVC WR DUK PGN PNW CMS SCG DTE PCG GXP POR

SO LNT CNP

ED XEL NST WEC

NVE IDA CNL NU

DTE Energy Annualized Dividend

$2.12

$2.24

$2.35

2009 2010 2011

Payout ratio in-line with 60% - 70% target

Future increases supported by targeted 5% - 6% operating EPS growth

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Investment Thesis

DTE Energy has a plan it believes will provide 5%—6% long-term operating EPS growth, an attractive dividend yield and a strong balance sheet

Utility growth plan driven by mandated investments

Constructive regulatory structure and continued cost savings enable utilities to earn their authorized returns

Plans in place to achieve operational excellence and customer satisfaction that are distinctive in our industry, with a focus on customer affordability

Meaningful, low-risk growth opportunities in non-utility businesses continue to provide diversity in earnings and geography

5%-6% Average Annual EPS Growth

Attractive Dividend

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Contact Us

DTE Energy Investor Relations www.dteenergy.com/investors 313-235-8030

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Appendix

Michigan Public Service Commission (MPSC)

The Michigan Public Service Commission is composed of three members appointed by the Governor with the advice and consent of the Senate.

Commissioners are appointed to serve staggered six-year terms.

No more than two Commissioners may represent the same political party.

One commissioner is designated as chairman by the Governor.

John Quackenbush

Chairman

Appointed: 9/15/11

Term Ends: 7/2/17 (Republican)

Orjiakor Isiogu

Commissioner

Appointed: 9/9/07

Term Ends: 7/2/13 (Democrat)

Greg White

Commissioner

Appointed: 12/4/09

Term Ends: 7/2/15 (Independent)

Source: MPSC website - www.michigan.gov/mpsc - Jan. 2010

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2011 Operating Earnings Variance

Operating Earnings*

($ millions, except EPS)

2010 2011 Change

Detroit Edison $ 438 $ 443 $ 5

MichCon 107 110 $ 3

Gas Storage and

Pipelines 51 57 $ 6

Unconventional Gas

Production (11) (6) $ 5

Power & Industrial Projects 85 38 $ (47)

Energy Trading 6 52 $ 46

Corporate & Other (69) (61) $ 8

DTE Energy $ 607 $ 633 $ 26

Operating EPS $ 3.60 $ 3.73 $ 0.13

Avg. Shares Outstanding 168.7 169.9

Drivers

Detroit Edison

Rate increase partially offset by increased maintenance activity

MichCon

Primarily cooler 2011 weather partially offset by lower midstream revenues

Non-Utility

Gas Storage & Pipelines driven by higher transportation revenues

Power & Industrial due to non-repeating 2010 earnings

Energy Trading due to improved economic performance

Corporate & Other

Primarily driven by lower interest expense in 2011

* Reconciliation to GAAP reported earnings included in the appendix

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Detroit Edison

Renewable Energy Portfolio

17 MW Biomass

26 MW Wind

120 MW Wind

Gratiot Wind Energy

212 MW Wind

~$250M Capital Investment On-Line Late 2011/Early 2012

(102 MW Owned/110 MW Contracted)

Detroit Edison Owned

Contracted

6 MW Landfill Gas

SolarCurrents Pilot:

7 MW Contracted

Thumb Wind Farms

~110 MW Wind

~$250M Capital Investment

On-Line 2012 / 2013

Michigan RPS Requirements

10% of retail sales must come from Michigan-based renewable sources by 2015 Up to 50% owned by utility New capacity requirements: 300 MWs by 2013; 600 MWs by 2015

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Gas Storage and Pipeline Development Update

Bluestone Pipeline & Gathering

$280 million Phase 1 (including gathering) in-Phase 2 in-service

Millennium Pipeline

First 2 line late 2012 Expands

0.8 Bcf/d

Phase 1

Phase 2

Initial gathering

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Barnett Shale Operating Metrics

Reserves (Bcfe)

555

201

354

YE2010

559

186

373

YE2011

Proved

Probable

(Unaudited)

70 16

54

YE2010

87 17

70

YE2011

Net Developed Acres Net Undeveloped Acres

Gross Producing Wells

194

215

YE2010

YE2011

Net Production (Bcfe)

4.8

5.1

YE2010

YE2011

2011 Results

21 new wells on-line, 2 in progress Production of 5.1 Bcfe (54% liquids) 58% increase in oil sales volume year-over-year Proved reserves (Mcfe basis): 50% liquids / 50% dry gas Acquired 17 thousand acres, net

2012 Goals

Prudently manage Barnett assets and focus on developing liquids production

Pursue monetization opportunities

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Unconventional Gas: Barnett Shale Assets Focused on Marble Falls Oil Play

Oil and NGLs* driving value

Revenue by product (%)

Oil 52%

NGL34% Gas 14%

2010 2011 2012E

Proved reserves by product (%)

2009 2010 2011

Oil 11%

NGL39%

Gas 50%

* Natural gas liquids

Focus on maturing Marble Falls oil play

Wells confirming resource play

Vertical wells initial production up to 250 bbls oil per day plus liquids rich gas

Potential upside with horizontal wells

~65,000 net acre Marble Falls position

Well payback period of 6-24 months at current prices

Vertical well costs of $800k

Attractive economics at current prices

33

Power & Industrial Projects

Reduced Emission Fuels Development Update

Significant value and strong contribution for next 10 years

2011 Status

3 units in service at Detroit Edison plants

2 units constructed and in service at two midwest utilities

4 units available for relocation

Under $5 million contribution

2012 Plan

Optimize operations and throughput at 5 units in service

Relocate 4 units

Expected to contribute

~$30 million

2013 - 2021 Outlook

9 units in operation

Average annual contribution of

~$50 million

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DTE Energy Trading Reconciliation of Operating Earnings* to Economic Net Income

($ millions)

$52

($5)

$47

FY 2011 Operating Earnings*

Accounting

Adjustments**

FY 2011 Economic Net Income

$6

$16

$22

FY 2010 Operating Earnings*

Accounting

Adjustments**

FY 2010 Economic Net Income

* Reconciliation to GAAP reported earnings included in the appendix

** Consists of the income statement effect of not recognizing changes in the fair market value of certain non-derivative contracts including physical inventory and capacity contracts for transportation, transmission and storage. These contracts are not MTM, instead are recognized for accounting purposes on an accrual basis.

*** Economic gross margin is the change in net fair value of realized and unrealized purchase and sale contracts including certain non-derivative contract costs.

Economic net income equals economic gross margin*** minus O&M expenses and taxes. DTE Energy management uses economic net income as one of the performance measures for external communications with analysts and investors. Internally, DTE Energy uses economic net income as one of the measures to review performance against financial targets and budget.

Energy Trading Operating Earnings*

($ millions, after-tax)

YE 2011 YE 2010

Realized $71 $56

Unrealized 28 (2)

O&M / Other (47) (48)

$52 $6

35

Reconciliation of 2011 Reported to Operating Earnings

Use of Operating Earnings Information – DTE Energy management believes that operating earnings provide a more meaningful representation of the company’s earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors. Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

2011 Net Income ($ millions)

Gas Power &

DTE Electric Gas Storage & Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other

Reported Earnings $711 $434 $110 $57 ($6) $38 $52 $26

Michigan Corporate Income Tax

Adjustment (87) - - - - (87)

Fermi 1 Asset Retirement Obligation 9 9 - - - -

Operating Earnings $633 $443 $110 $57 ($6) $38 $52 ($61)

2011 $EPS

Gas Power &

DTE Electric Gas Storage & Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other

Reported Earnings $4.18 $2.55 $0.65 $0.34 ($0.04) $0.22 $0.31 $0.15

Michigan Corporate Income Tax

Adjustment (0.50) - - - - (0.50)

Fermi 1 Asset Retirement Obligation 0.05 0.05 - - - -

Operating Earnings $3.73 $2.60 $0.65 $0.34 ($0.04) $0.22 $0.31 ($0.35)

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Reconciliation of 2010 Reported to Operating Earnings

Use of Operating Earnings Information – DTE Energy management believes that operating earnings provide a more meaningful representation of the company’s earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors. Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

2010 Net Income ($ millions)

Gas Power &

DTE Electric Gas Storage & Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other

Reported Earnings $630 $441 $127 $51 ($11) $85 $6 ($69)

Performance Excellence Process -

Cost to Achieve Deferral* (20) -(20) -

Settlement with Detroit Thermal (3) (3) - - - -

Operating Earnings $607 $438 $107 $51 ($11) $85 $6 ($69)

2010 $EPS

Gas Power &

DTE Electric Gas Storage & Unc. Gas Indust. Energy Corporate Energy Utility Utility Pipelines Prod. Projects Trading & Other Reported Earnings $3.74 $2.62 $0.75 $0.30 ($0.06) $0.50 $0.04 ($0.41) Performance Excellence Process - Cost to Achieve Deferral* (0.12) - (0.12) - - - - -

Settlement with Detroit Thermal (0.02) (0.02) - - - - - -

Operating Earnings $3.60 $2.60 $0.63 $0.30 ($0.06) $0.50 $0.04 ($0.41)

* Deferral of previously expensed cost to achieve as allowed for in June 3, 2010 MPSC order (case - U-15985)

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Reconciliation of 2009 Reported to Operating Earnings

Use of Operating Earnings Information – DTE Energy management believes that operating earnings provide a more meaningful representation of the company’s earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors. Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

FY 2009 Net Income ($ millions)

Gas Power &

DTE Electric Gas Storage and Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other

Reported Earnings $532 $376 $80 $49 ($9) $31 $75 ($70)

Gain on Sale - gathering and treating

assets (before goodwill allocation) (13) - (13) - - - -

Goodwill allocation - gathering and

treating assets 13 - 13 - - - -

Chrysler Bad Debt 5 4 - - 1 - -

General Motors Bad Debt 3 - - - 3 - -

Antrim Hedge 3 - - - - 3

Operating Earnings $543 $380 $80 $49 ($9) $35 $75 ($67)

FY 2009 $EPS

Gas Power &

DTE Electric Gas Storage and Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other

Reported Earnings $3.24 $2.28 $0.49 $0.30 ($0.05) $0.19 $0.46 ($0.43)

Gain on Sale - gathering and treating

assets (before goodwill allocation) (0.08) - (0.08) - - - -

Goodwill allocation - gathering and

treating assets 0.08 - 0.08 - - - -

Chrysler Bad Debt 0.03 0.02 - - 0.01 - -

General Motors Bad Debt 0.02 - - - 0.02 - -

Antrim Hedge 0.01 - - - - 0.01

Operating Earnings $3.30 $2.30 $0.49 $0.30 ($0.05) $0.22 $0.46 ($0.42)

38

Reconciliation of 2008 Reported to Operating Earnings

Use of Operating Earnings Information – DTE Energy management believes that operating earnings provide a more meaningful representation of the company’s earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors. Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

FY 2008 Net Income ($ millions)

Gas Power &

DTE Electric Gas Storage and Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other Synfuel

Reported Earnings $546 $331 $85 $38 $84 $40 $42 ($94) $20

Performance Excellence Process 6 - 4 - - 1 1 - -

Core Barnett Sale (81) - - (81) - - -

Antrim hedge 13 - - - - 13 -

Barnett Lease impairment 5 - - 5 - - -

Crete Sale - Tax True up 2 - - - - 2 -

Synfuel Discontinued Operations (20) - - - - - (20)

Operating Earnings $471 $331 $89 $38 $8 $41 $43 ($79) $ -

FY 2008 $EPS

Gas Power &

DTE Electric Gas Storage and Unc. Gas Indust. Energy Corporate

Energy Utility Utility Pipelines Prod. Projects Trading & Other Synfuel

Reported Earnings $3.34 $2.03 $0.52 $0.23 $0.52 $0.25 $0.26 ($0.59) $0.12

Performance Excellence Process 0.05 - 0.03 - - 0.01 0.01 - -

Core Barnett Sale (0.50) - - (0.50) - - -

Antrim hedge 0.08 - - - - 0.08 -

Barnett Lease impairment 0.03 - - 0.03 - - -

Crete Sale - Tax True up 0.01 - - - - 0.01 -

Synfuel Discontinued Operations (0.12) - - - - - (0.12)

Operating Earnings $2.89 $2.03 $0.55 $0.23 $0.05 $0.26 $0.27 ($0.50) $ -

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Reconciliation of Other Reported to Operating Earnings

Use of Operating Earnings Information – DTE Energy management believes that operating earnings provide a more meaningful representation of the company’s earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors. Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

In this presentation, DTE Energy provides guidance for future period operating earnings. It is likely that certain items that impact the company’s future period reported results will be excluded from operating results. A reconciliation to the comparable future period reported earnings is not provided because it is not possible to provide a reliable forecast of specific line items. These items may fluctuate significantly from period to period and may have a significant impact on reported earnings.

40