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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2002

Commission file number 1-11607

DTE ENERGY COMPANY
(Exact name of registrant as specified in its charter)

313-235-4000
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

     None     

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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. x

Indicate by check mark whether the registrant is an accelerated filer. Yes x No o

Based on the closing price on June 28, 2002, our most recently completed second quarter, the aggregate market value of our Common Stock held by non-affiliates was $7.5 billion.

At January 31, 2003, 167,662,916 shares of DTE Energy’s Common Stock, substantially all held by non-affiliates, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Certain information in DTE Energy Company’s definitive Proxy Statement for its 2003 Annual Meeting of Common Shareholders to be held April 17, 2003, which will be filed with the Securities and Exchange Commission pursuant to Regulation 14A, not later than 120 days after the end of the Registrant’s fiscal year covered by this report on Form 10-K, is incorporated herein by reference to Part III (Items 10, 11, 12 and 13) of this Form 10-K.

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DTE ENERGY COMPANY

ANNUAL REPORT ON FORM 10-K
YEAR ENDED DECEMBER 31, 2002

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Definitions

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FORWARD-LOOKING STATEMENTS

Certain information presented herein includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve certain risks and uncertainties that may cause actual future results to differ materially from those contemplated, projected, estimated or budgeted in such forward-looking statements. There are many factors that may impact forward-looking statements including, but not limited to, the following:

•		the effects of weather and other natural phenomena on operations and sales to customers;
•		economic climate and growth in the geographic areas where we do business;
•		environmental issues, including changes in the climate, and regulations;
•		nuclear regulations and risks associated with nuclear operations;
•		ability to utilize Section 29 tax credits or sell interests in facilities producing such credits;
•		implementation of electric and gas Customer Choice programs;
•		implementation of electric and gas utility restructuring in Michigan;
•		employee relations;
•		unplanned outages;
•		access to capital markets and capital market conditions and other financing efforts which can be affected by credit agency ratings;
•		the timing and extent of changes in interest rates;
•		the level of borrowings;
•		changes in the cost of fuel, purchased power and natural gas;
•		effects of competition;
•		impact of FERC and MPSC proceedings and regulations;
•		contributions to earnings by non-regulated businesses;
•		changes in federal or state tax laws and their interpretations, including the code, regulations, rulings, court proceedings and audits;
•		ability to recover costs through rate increases;
•		property insurance;
•		the cost of protecting assets against or damage due to terrorism; and
•		changes in accounting standards and financial reporting regulations.

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 statement speaks 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.

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PART I

Items 1 & 2. Business & Properties

GENERAL

In 1995, DTE Energy incorporated in the state of Michigan. DTE Energy owns three regulated companies, Detroit Edison, the International Transmission Company (ITC) and MichCon, and numerous non-regulated subsidiaries engaged in energy marketing and trading, energy services, and various other electricity, coal and gas related businesses. DTE Energy is an exempt holding company under the Public Utility Holding Company Act (PUHCA) of 1935. DTE Energy and all of its subsidiary companies are exempt from the provisions of such Act, except Section 9 (a) (2) that relates to the acquisition of securities of public utility companies and Section 33 that relates to the acquisition of foreign (non-U.S.) utility companies.

Detroit Edison, incorporated in the state of Michigan in 1967, is a public utility subject to regulation by the MPSC and FERC. Detroit Edison is engaged in the generation, purchase, distribution and sale of electric energy to 2.1 million customers in a 7,600 square mile area in southeastern Michigan.

ITC, incorporated in the state of Michigan in 2000, is regulated by the FERC for rates, conditions of service and operations relating to the transmission of electricity. In January 2001, Detroit Edison transferred its transmission assets to ITC, then a wholly owned subsidiary of Detroit Edison. On May 31, 2001, Detroit Edison distributed 100% of the shares of ITC to DTE Energy. In December 2002, DTE Energy reached a definitive agreement to sell ITC. The sale closed on February 28, 2003. See Notes 4 and 21 for a further discussion of the ITC sale.

MichCon is a Michigan corporation organized in 1898. MichCon became an indirect wholly owned subsidiary of DTE Energy in conjunction with the acquisition of MCN Energy (now referred to as Enterprises), which was completed on May 31, 2001. See Note 4 for a further discussion of the MCN Energy acquisition. MichCon is a natural gas utility subject to regulation by the MPSC. MichCon is engaged in the purchase, storage, transmission and distribution of natural gas to 1.2 million customers in a 14,700 square mile area throughout Michigan.

Our website is www.dteenergy.com. Available free of charge on our website is information such as previously filed reports with the SEC, press releases and other informational resources regarding DTE Energy and our subsidiaries. The information on our website is updated as soon as reasonably practicable. The information on our website is not, and shall not be deemed to be, a part of this Form 10-K or any other filing we make with the SEC. Additionally, our previously filed reports and statements are also available at the SEC’s website: www.sec.gov.

References in this report to “we,” “us” and “our” are to DTE Energy and its subsidiaries, collectively.

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We operate our businesses through three strategic business units (Energy Resources, Energy Distribution and Energy Gas). The balance of our business consists of Corporate & Other. Based on this structure, we set strategic goals, allocate resources and evaluate performance. Each business unit has regulated and non-regulated operations, and contributed to DTE Energy’s 2002 diluted earnings per share of $3.83. See Note 19 — Segment and Related Information, for financial information by segment for the last three years. A discussion of each business follows.

ENERGY RESOURCES

Power Generation

Description

Power Generation comprises our regulated power generation business and plants within Detroit Edison. These plants are regulated by numerous federal and state governmental agencies, including the MPSC, NRC and the EPA. Electricity is generated from Detroit Edison’s numerous fossil plants, its hydroelectric pumped storage plant and its nuclear plant, and then sold principally throughout Michigan, the Midwest and Ontario, Canada. The electricity we produce is sold to four major classes of customers: residential, commercial, industrial and wholesale.

Weather, economic factors and electricity prices affect sales to customers. Our peak load and highest total system sales generally occur during the third quarter of the year driven by air conditioning and cooling-related demands. During 2002, sales to automotive and automotive-related customers accounted for approximately 13% of total Power Generation operating revenues. Power Generation sales are not dependent upon a limited number of customers. The loss of any one or a few customers is not reasonably likely to have a material adverse effect on Power Generation.

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Our power is generated from a variety of fuels and is supplemented with market purchases. The table below details our energy supply mix and average cost per unit:

We expect an adequate supply of fuel and purchased power to meet our obligation to serve customers. We have short and long-term supply contracts for expected fuel and purchased power requirements as detailed in the following table:

Detroit Edison’s generating capability is heavily dependent upon coal. The coal is purchased from various sources in different geographic areas under agreements that vary in both pricing and terms. Detroit Edison expects to obtain the majority of its coal requirements through long-term and medium-term contracts with the balance to be obtained through short-term agreements and spot purchases. Detroit Edison has contracts with eight coal suppliers for a total purchase of up to 29.6 million tons of low-sulfur western coal to be delivered from 2003 through 2006. Detroit Edison also has contracts with three suppliers for the purchase of approximately 4.0 million tons of Appalachian coal to be delivered from 2003 through 2005. These existing long-term coal contracts include provisions for price escalation as well as de-escalation. Given the geographic diversity of supply, Detroit Edison believes it can meet the expected generation requirements. We have long-term transportation contracts with companies to provide rail car and vessel services for delivery of purchased coal to our generating facilities.

We purchase power from other electricity generators, suppliers and wholesalers. These purchases supplement our generation capability to meet customer demand during peak cycles. For example, when high temperatures occur during the summer we require additional electricity to meet demand. This access to additional power is an efficient and economical way to meet our obligation to customers without increasing capital expenditures to build additional base-load power facilities.

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Regulation

Detroit Edison’s Power Generation business is subject to the regulatory jurisdiction of the MPSC. The MPSC issues orders pertaining to rates, recovery of certain costs, including the costs of generating facilities and regulatory assets, conditions of service, accounting and operating-related matters. Detroit Edison’s MPSC-approved rates charged to customers have historically been designed to allow for the recovery of costs, plus an authorized rate of return on our investments. The FERC regulates Detroit Edison with respect to financing authorization and wholesale electric activities. The NRC has regulatory jurisdiction over all phases of the operation, construction, licensing and decommissioning of Detroit Edison’s Fermi 2 nuclear plant.

Since 1996 there have been several important acts, orders, court rulings and legislative actions in the state of Michigan which affect our Power Generation operations. In 1996, the MPSC began an initiative designed to give all of Michigan’s electric customers added choices and the opportunity to benefit from lower electric generation costs resulting from competition. In 1998, the MPSC authorized the electric Customer Choice program that allowed for a limited number of customers to purchase electricity from suppliers other than their local utility. The local utility would continue to transport the electric supply to the customers’ facilities, thereby retaining distribution margins. The electric Customer Choice program was phased in over a three-year period, with all customers having the option to choose their electric supplier by January 2002.

In 2000, the Michigan Legislature enacted legislation that reduced electric rates by 5% and reaffirmed January 2002 as the date for full implementation of the electric Customer Choice program. This legislation also contained provisions freezing rates through 2003 and preventing rate increases for residential customers through 2005 and for small business customers through 2004. The legislation and an MPSC order issued in 2001 established a methodology to enable Detroit Edison to recover costs related to its generation operations (stranded costs) that may not otherwise be recoverable due to electric Customer Choice related lost sales and margins. The legislation also provides for the recovery of the costs associated with the implementation of electric Customer Choice. The MPSC has determined that these costs be treated as regulatory assets. Additionally, the legislation provides for recovery of costs incurred as a result of changes in taxes, laws and other governmental actions including the Clean Air Act.

Due to MPSC orders issued in 1997 and 1998, that altered the regulatory process in Michigan and provided a plan for transition to competition for the generation business of Detroit Edison, effective December 1998, Detroit Edison’s generation business no longer met the criteria of SFAS No. 71, “Accounting for the Effects of Certain Types of Regulation.” Since the June 2000 legislation was enacted into law and with the issuance of subsequent clarifying MPSC orders in 2001 and 2002, rates for retail customers and transition charges for electric Customer Choice customers will be set to recover Detroit Edison’s generation costs. Such costs will be billed and recovered from both retail and choice customers and thus satisfy the criteria of SFAS No. 71. In addition, we have the legislative authority to defer regulatory costs in 2002 and 2003 and to begin recovery of such costs starting in 2004 after the mandated rate freeze expires. As a result, we resumed application of SFAS No. 71 for our generation business in the fourth quarter of 2002.

In November 2002, the MPSC requested Michigan gas and electric utilities to justify why their retail rates should not be lowered due to potential personal property tax reductions. We have responded and await further MPSC action.

For additional information regarding our regulatory environment, see Note 6 — Regulatory Matters.

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Properties

Detroit Edison owns generating properties and facilities that are all located in the state of Michigan. Substantially all the net utility properties of Detroit Edison are subject to the lien of its mortgage. Power Generation plants owned and in service as of December 31, 2002 are as follows:

Strategy and Competition

Our strategy for Power Generation is to build upon Detroit Edison’s solid reputation. We will continue to strive to be the preferred electricity supplier in southeast Michigan. We believe that we can accomplish our goal by working with our customers and communities to be a reliable supplier of electricity. To control expenses, we plan to optimize our fuel blends and make investments in our generating plants that will reduce unplanned plant outages and improve operating efficiencies, thereby increasing generation output without proportional additional fuel requirements. Revenues from year to year will vary due to weather conditions, economic factors, regulatory events and other risk factors as discussed in the “Risk Factors” section that follows.

Alternative suppliers of generation services in the retail and wholesale markets create competition in the electric generating business. Effective January 1, 2002, the electric Customer Choice program expanded in Michigan whereby all electric customers can choose to purchase their electricity from alternative suppliers. Approximately 6% of Detroit Edison’s retail generation sales were lost in 2002 as a result of

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customers participating in the electric Customer Choice program. We expect to lose between 10% to 13% of retail sales in 2003 as a result of customers choosing to participate in the program.

Energy Services

Description

Non-regulated Energy Services has three business lines: Coal-Based Fuels, On-Site Energy Projects and Merchant Generation.

Coal-Based Fuels

Coal-Based Fuels operations include producing synthetic fuel from nine synfuel plants and producing coke from three coke battery plants. Both processes generate tax credits under Section 29 of the Internal Revenue Code. Section 29 is designed to stimulate investment in and development of alternate fuel sources. Synfuel-related Section 29 tax credits expire in 2007. Section 29 tax credits for two of our three coke batteries expired at the end of 2002 with the third expiring in 2007.

The synthetic fuel process involves chemically modifying and binding particles of coal to produce a fuel that is used for power generation and coke production. The modification involves a three-step process that produces a solid synthetic fuel product that has characteristics similar to those of high-quality mined coal. The potential benefits of this process can include increased use of lower quality coal, improved coking qualities of the coal, reduced dust and air emissions, and improved material handling. During 2002, we sold a 95% interest in two of our synfuel projects.

The coke battery facilities produce coke that is used in blast furnaces within the steel industry. DTE Energy is one of the largest producers in the U.S. of coke for the steel industry. During 2001, we sold a 49% interest in two of our coke battery projects, and in 2002, consistent with the original purchase and sale agreement, our third coke battery project interest was reduced from 95% to 5%.

On-Site Energy Projects

Energy Services owns and operates on-site facilities, including pulverized coal injection, power generation, steam production, chilled water, wastewater treatment and compressed air. Many of these facilities deliver utility services to industrial, commercial and institutional customers.

Merchant Generation

Energy Services develops and operates peaking and gas-fired electric generating plants. We have four electric generating plants in operation, all located in the Great Lakes region. We have contracts for approximately 39% of the 2003 output of these plants.

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Properties

Coal-Based Fuels owns interest in and operates nine synfuel plants at eight production sites. Additionally, we have interests in three coke battery facilities in the United States, two of which we operate.

Coal Based Fuels

On-Site Energy Projects owns and/or operates energy facilities throughout the United States. The significant properties are varied in both use and function and are listed below:

     On-Site Energy Projects

The Merchant Generation fleet consists of four natural gas-fired electric generating plants that are all located in the Great Lakes region.

     Merchant Generation

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Strategy and Competition

Our strategy for Energy Services is to continue leveraging our extensive energy-related operating experience and project management capability to develop and grow the on-site energy and merchant generating businesses. We continue to evaluate opportunities to sell interests in some or all of our synfuel plants.

We anticipate building around our core strengths in the markets where we operate. In determining which markets to compete in, we examine closely the regulatory environment, the number of competitors and our ability to achieve sustainable margins. We plan to maximize the effectiveness of our inter-related businesses as we expand from our current regional focus. As we pursue growth opportunities, our first priority will be to achieve value-added returns, and then trend towards increased operational scale.

We plan to focus on the following areas for growth:

•		Acquisition of assets in the distressed energy market;
•		Expansion of on-site energy projects;
•		Select development of coal-fired generation; and
•		Development of new tax advantaged opportunities.

Energy Marketing & Trading

Description

Energy Marketing & Trading consists of the wholesale electric and gas marketing and trading operations of DTE Energy Trading Company and CoEnergy Trading Company. We acquired CoEnergy Trading as part of the MCN Energy acquisition in May 2001. Energy Marketing & Trading focuses on physical power marketing and structured transactions for large customers, as well as the enhancement of returns from DTE Energy’s power plants, pipeline and storage assets. In pursuing these goals, Energy Marketing & Trading may enter into forwards, futures, swaps and option contracts.

Regulation

There have been numerous events that impacted the energy trading business. These events led to increased oversight and scrutiny of the trading business by state and federal regulatory agencies.

Strategy and Competition

Our strategy for Energy Marketing & Trading is to execute on our vision of the role energy trading plays in delivering value-added services to our customers. Over the past year many of the major market players have either ceased as going concerns or are no longer engaged in the energy trading business. We seek to gradually expand this business in a manner consistent with and complementary to the growth of our other business segments. We plan to focus on physical marketing and the optimization of our portfolio of energy assets. We have risk management and credit policies to monitor and minimize risk.

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Coal Services

Description

Coal Services specializes in minimizing energy production costs and maximizing reliability of supply for energy-intensive customers. We provide fuel, transportation and equipment management services tailored to the individual requirements of each customer. Our customers include electric utilities, merchant producers, integrated steel mills and large industrial producers with high energy requirements. We also operate a number of railcar maintenance and repair facilities serving coal transporters, as well as all other industries and rail car types.

Properties

We lease approximately 2,800 rail cars. We own fixed and mobile railcar maintenance and repair facilities in Nebraska and Indiana.

Strategy and Competition

We plan to leverage our position as one of the top North American coal marketers and our reputation as an efficient manager of transportation assets. Certain trends are taking place within our industry that could have an impact on how we compete in the future. Industry consolidation in the mining business is resulting in fewer but larger mines. Consolidation in the railroad industry is reducing the number of rail companies we can contract with to transport coal for our customers. We plan to work with suppliers and the railroads to promote secure and competitive access to the energy requirements for our customers. We are also exploring a technology that removes clay and dirt from waste coal. If the technology is commercially practical, it could contribute significantly to earnings and provide environmental benefits.

Biomass

Description

Biomass develops, owns and operates landfill gas recovery systems in the U.S. Landfill gas, a byproduct of solid waste decomposition, is composed of approximately equal portions of methane and carbon dioxide. Converting the methane into a renewable energy resource conserves fossil fuels. Biomass operations generate Section 29 tax credits that expire in 2007.

Biomass helps limit potential greenhouse gas emissions by developing and implementing landfill gas recovery systems that capture the gas and use it productively. Such a recovery system eliminates detrimental air emissions by preventing methane from migrating off-site and becoming a safety hazard or odor problem. Landfill gas recovery systems also provide local utilities, industry and consumers with an opportunity to use a competitive, renewable source of energy. Applications for this form of energy include steam and electricity generation, fueling of asphalt plants and kilns for brick manufacturing.

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Properties

Biomass has 30 operating sites and other projects are under development. These sites are located throughout the continental U.S.

Strategy and Competition

Biomass’ strategy capitalizes upon our industry experience of over 20 years. We are evaluating business growth through both development and acquisitions. We compete primarily with fossil fuels like natural gas, but we believe the environmental benefits of biomass along with reasonable and economic access to these landfill sites provide a platform for future growth.

ENERGY DISTRIBUTION

Power Distribution & Transmission

Description

The electric distribution services and the steam heating business of Detroit Edison and the electric transmission services of ITC comprise our regulated Power Distribution & Transmission business. This business transmits and distributes electricity generated by Energy Resources’ Power Generation business and alternative electric suppliers to Detroit Edison’s 2.1 million customers in southeastern Michigan. The transmission assets of ITC are operated by the Midwest Independent System Operator, a regional transmission operator responsible for evaluating and coordinating requests for transmission service on a non-discriminatory basis. In the fourth quarter of 2002, we entered into an agreement with Kohlberg, Kravis, Roberts and Company and Trimaran Capital Partners, L.L.C. to sell ITC for $610 million. The sale closed on February 28, 2003. In January 2003, we sold the steam heating business to Thermal Ventures II, LP.

Weather and economic factors affect our sales and revenues. Similar to the Power Generation business, our peak load and highest total system sales generally occur during the third quarter of the year driven by air conditioning and cooling-related demands. Power Distribution & Transmission’s sales are not dependent upon a limited number of customers. Additionally, customers participating in the electric Customer Choice program will not impact Power Distribution & Transmission’s operating revenues or the number of customers served. The loss of any one or a few customers is not reasonably likely to have a material adverse effect on Power Distribution & Transmission.

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Regulation

Detroit Edison’s Power Distribution is subject to the regulatory jurisdiction of the MPSC. ITC’s transmission business is subject to the regulatory jurisdiction of the FERC. The MPSC and FERC have regulatory jurisdiction over rates, conditions of service and other operating-related matters. As previously discussed, Michigan legislation prevents Detroit Edison from increasing rates to residential customers through 2005, for small business customers through 2004, and remaining customers through 2003. We expect the rates charged by ITC to remain at current levels through December 2004.

For additional information regarding our regulatory environment, see Note 6 — Regulatory Matters.

Properties

Detroit Edison owns and operates 662 distribution substations with a capacity of 30,843,000 kilovolt- amperes (kV) and 406,176 line transformers with a capacity of 24,493,806 kV amperes. Substantially all of the net utility properties of Detroit Edison are subject to the lien of its mortgage. Circuit miles of distribution lines owned and in service as of December 31, 2002 are as follows:

ITC owns and operates 40 transmission stations with a capacity of 20,250,000 kV amperes. Circuit miles of transmission lines owned and in service as of December 31, 2002 are as follows:

Detroit Edison and Consumers Energy Company interchange energy through nine interconnections currently owned and operated by ITC and Michigan Electric Transmission Company (METC). Detroit Edison and Consumers Energy Company also have interchange agreements that permit the exchange of electric energy through 12 ITC and METC owned interconnections with First Energy, Indiana Michigan Power Company, Northern Indiana Public Service Company and Ontario Hydro Services Company. In addition, Detroit Edison has interchange agreements for the exchange of electric energy with Michigan South Central Power Agency and the City of Wyandotte.

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Strategy and Competition

Our strategy is to build upon Detroit Edison’s solid reputation of being a reliable distributor of electricity. We plan to focus on improving the quality of customer service and lowering operating costs by improving operating efficiencies as well as targeting capital investments in areas that have the greatest impact on reliability improvements with the goal of managing distribution rates charged to utility customers.

The decision to sell ITC is consistent with our strategic view that maximization of shareholder value and high levels of customer service are best achieved with assets we own, operate and exercise significant control. The sale was completed on February 28, 2003 and ITC will continue to provide transmission services to the Energy Distribution business. As Detroit Edison’s rates were designed to recover transmission costs, billings to Detroit Edison from ITC will be recovered from Detroit Edison’s utility customers. Rates charged by ITC to Detroit Edison are expected to remain at current levels through December 2004. Thereafter, rates would be subject to normal FERC regulation and market forces.

Competition in the regulated electrical distribution business is provided primarily by on-site generation by industrial customers and distributed generation applications by industrial and commercial customers. We do not expect significant competition for distribution to any group of customers.

Distributed Generation

Description

Distributed Generation, primarily consisting of DTE Energy Technologies (Dtech), invests in emerging technologies that complement our existing businesses. We currently have businesses that develop, market and distribute a broad portfolio of distributed generation products, provide application engineering, and monitor and manage system operations. Distributed generation units seek to generate safe, clean, reliable power at or near the point of use, rather than at large central power stations, which can provide very high efficiencies due to effective use of waste heat. Distributed generation products use a range of technologies, including internal combustion engines, external combustion engines, mini-turbines and fuel cells.

Distribution Generation has steadily increased the number of completed projects each year. The table below details the number of projects completed in the past three years.

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Strategy and Competition

Our goal is to become a significant player in the distributed generation market, providing one-stop shopping that meets customers’ total energy needs. Key milestones toward this success include full commercialization of our internal combustion engine-driven products as well as our monitoring and system management operations. Additionally, we are completing the development of our first turbine-powered product. Our North American sales structure is in place and we are continuing to expand our support capabilities (both direct and with partners). Important objectives beyond North America will be the continued development of marketing relationships in Europe, Korea and Japan.

Competition in the distributed generation business currently is provided by other distributors of stand-by generators. We compete on the basis of cost and seek to better meet customer needs with our enhanced offerings including turn-key installations, project management, after sale service and system management operation. We anticipate increased future competition, including the entry of new competitors, for continuous duty products and services. To compete effectively, we develop proprietary products and services that are sold through our existing distribution channels in North America and exclusive arrangements in international markets.

ENERGY GAS

Gas Distribution

Description

Gas Distribution operations primarily consist of MichCon, our regulated gas utility. Gas Distribution provides gas sales and transportation delivery services to 1.2 million residential, commercial and industrial customers located throughout Michigan. The following table details sales and deliveries to these customers.

Gas Distribution makes gas sales primarily to residential and small-volume commercial and industrial customers. It provides end user transportation to large-volume commercial and industrial customers and gas Customer Choice customers who purchase natural gas directly from other suppliers and utilizes MichCon’s pipeline network to transport the gas to the customer’s facilities. Gas Distribution provides intermediate transportation to producers, brokers and other gas companies that own the natural gas transported, but are not the ultimate consumers. MichCon’s revenues and net income are impacted by weather and are concentrated in the first and fourth quarters of the year due to heating-related demand. MichCon’s operations are not dependent upon a limited number of customers, and the loss of any one or a few customers is not reasonably likely to have a material adverse effect on MichCon.

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We obtain our natural gas supply from various sources in different geographic areas under agreements that vary in both pricing and terms.

Supply under contract represents approximately 89% of the expected 157 Bcf of supply requirements in 2003. We expect to meet the balance of gas supply requirements through open market purchases. As a result of varying demand primarily due to weather, MichCon may use existing gas in inventory to meet unanticipated customer obligations. Given the geographic diversity of supply, coupled with its 124 Bcf of storage capacity, MichCon believes it can meet the supply requirements for customers. MichCon has long-term firm transportation agreements expiring on various dates through 2011 for delivery of purchased natural gas to our distribution system.

Regulation

MichCon is subject to the regulatory jurisdiction of the MPSC, which issues orders pertaining to rates, recovery of certain costs, including the costs of regulatory assets, conditions of service, accounting and operating-related matters. MichCon is subject to the requirements of other regulatory agencies with respect to safety, the environment and health.

In the late 1990s, the MPSC began an initiative designed to give all of Michigan’s natural gas customers added choices and the opportunity to benefit from lower gas costs resulting from competition. In 1999, the MPSC approved a comprehensive experimental three-year gas Customer Choice program that allowed an increasing number of customers to purchase natural gas from suppliers other than their local utility. The local utility would continue to transport the natural gas supply to the customers’ facilities, thereby retaining distribution margins. In December 2001, the MPSC issued an order that continues the gas Customer Choice program on a permanent and expanding basis beginning with the conclusion of the three-year temporary program on March 31, 2002. Under the expanded program, beginning April 1, 2002, up to approximately 40% of customers could elect to purchase gas from suppliers other than MichCon. Beginning in April 2003, up to approximately 60% of customers could participate, and beginning April 2004, all 1.2 million of MichCon’s gas customers could choose to participate. MichCon will continue to transport and deliver the gas to the participating customers’ premises at prices that generate favorable margins.

Under the December 2001 MPSC order, MichCon returned to a gas cost recovery (GCR) mechanism in January 2002 upon termination of its temporary Gas Sales Program. The GCR permits MichCon to pass the cost of natural gas to its customers. Under the Gas Sales Program, the MPSC suspended the GCR mechanism and MichCon’s sales rates included a gas commodity component that was fixed at $2.95 per thousand cubic feet (Mcf). Under this program, MichCon incurred commodity price risk associated with its ability to secure gas supplies at prices less than $2.95 per Mcf. Beginning in January 2002, MichCon’s gas sales rates include a gas commodity component designed to recover its actual gas costs.

For additional information regarding our regulatory environment, see Note 6 — Regulatory Matters.

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Properties

MichCon owns distribution, transmission and storage properties and facilities that are all located in the state of Michigan. At December 31, 2002, MichCon’s distribution system included 17,774 miles of distribution mains, 1,136,863 service lines and 1,241,516 active meters. MichCon owns 2,581 miles of transmission lines that deliver natural gas to the distribution districts and interconnect its storage fields with the sources of supply and the market areas. MichCon owns properties relating to four underground natural gas storage fields with an aggregate working gas storage capacity of approximately 124 Bcf. Substantially all of the net utility properties of MichCon are subject to the lien of its mortgage.

Strategy and competition

The strategy of the Gas Distribution business is to expand our role as the preferred provider of natural gas and high-value energy services within Michigan. We expect modest growth and to control costs in order to provide customers high-quality service at competitive prices.

Competition in the gas business primarily involves alternate fuels and energy sources. Natural gas continues to be the preferred space and water-heating fuel. Developers select natural gas in new construction because of the convenience, cleanliness and relative price advantage compared to propane, fuel oil and other alternative fuels.

Exploration & Production

Description

The Exploration & Production (E&P) business owns one of the industry’s largest Antrim gas reserve bases. Our emphasis is on developing and producing the 400 Bcf of proved reserves we owned as of December 31, 2002 predominantly located in northern Michigan. We drilled 90 wells (78 net of interest of others) in 2002. Wells drilled in the Antrim shale formations have high success rates and low drilling costs, and are therefore considered low risk.

Properties

The Michigan properties had 24.2 Bcf equivalents of production in 2002. E&P does not anticipate adding a significant amount of new reserves to its 400 Bcf of proven reserves at December 31, 2002.

Strategy

The E&P business is aggressively managing its Michigan oil and gas producing assets to optimize returns on investment. We have operator responsibilities for our Michigan properties with the goal of lowering the costs of producing reserves. E&P has rights to 86,050 acres (69,977 net of interest of others) of undeveloped leases. During 2003, E&P plans to continue developing this acreage and anticipates selling nearly all of its gas production to DTE Energy’s Energy Marketing & Trading segment. In addition, in order to leverage our E&P capabilities and the skills and experience of other non-regulated businesses, we are exploring opportunities in the coal bed methane gas production business.

Pipelines & Processing

Description

The Pipelines & Processing business has partnership interests in two interstate transmission pipelines, Portland Natural Gas Transmission System (Portland) and Vector Pipeline (Vector), seven carbon dioxide processing facilities and a 9.7 Bcf natural gas storage field. Additionally, we have contract rights to a 42.5 Bcf natural gas storage field. The assets of the Pipelines & Processing business are primarily supported by the Energy Marketing & Trading segment.

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Properties

Strategy and Competition

Pipelines & Processing focuses on opportunities in the Midwest-to-Northeast region that supply natural gas to meet growing demand. We expect much of the growth in the demand for natural gas in the United States to occur within the Mid-Atlantic and New England regions. These regions currently lack the pipeline capacity and low-cost storage necessary to deliver gas volumes to meet growing demand. Portland and Vector are interstate pipeline projects that are intended to fill a large portion of that need, and are complemented by Energy Gas’ significant storage capacity. Pipelines & Processing has interests in seven processing plants that extract carbon dioxide from Antrim gas production making it suitable for transportation to nearby markets. Additionally, we have contract rights in natural gas storage fields, capable of storing up to 52.2 Bcf. We plan to continue identifying asset opportunities related to natural gas, storage and transmission and working with other DTE Energy affiliates to secure the market required to support asset investment.

CORPORATE & OTHER

Description

Corporate & Other includes administrative and general expenses, and interest costs that have not been allocated to regulated and non-regulated businesses. Corporate & Other also includes various other non-regulated investments, including assets held for sale and in emerging energy technologies.

Strategy and Competition

Our energy technology strategy is to invest in a profitable portfolio of energy technology companies that facilitate the creation of new businesses, and expand growth opportunities for existing DTE Energy businesses. We seek to gain early experience in emerging energy sectors where energy trends and technologies may create potentially profitable opportunities. The investment portfolio consists of direct investments in energy technology companies and venture funds. Our largest investment is in Plug Power Inc., a company that designs and develops on-site electric fuel cell power generation systems. In 2002, we invested $9 million in five emerging energy companies and $2 million in three energy technology venture funds.

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ENVIRONMENTAL MATTERS

We are subject to extensive environmental regulation. Additional costs may result as the effects of various chemicals on the environment are studied and governmental regulations are developed and implemented. We expect to continue recovering environmental costs related to utility operations through rates charged to our customers. Greater details on environmental issues are provided in the following Notes to the Consolidated Financial Statements:

Detroit Edison

Detroit Edison is subject to applicable permit requirements, and to potentially increasing stringent federal, state and local standards covering among other things, particulate and gaseous stack emission limitations, the discharge of waste into lakes and streams and the handling and disposal of waste material.

The U.S. Environmental Protection Agency (EPA) issued ozone transport regulations and air quality standards relating to ozone and particulate air pollution. The new rules have led to additional controls on fossil-fueled power plants to reduce nitrogen oxides, sulfur dioxide, carbon dioxide and particulate emissions. To comply with these new controls, Detroit Edison has spent approximately $460 million through December 2002 and estimates that it will incur an additional $300 to $400 million of future capital expenditures over the next five to eight years to satisfy these new control requirements. The EPA initiated enforcement actions against several major electric utilities citing violations of new source provisions of the Clean Air Act. Detroit Edison received and responded to information requests from the EPA on this subject. We cannot predict the future impact of this issue upon Detroit Edison.

Detroit Edison is required to demonstrate that the cooling water intake structures at all of its facilities minimize adverse environmental impact. Detroit Edison filed such demonstrations and in the event of a final adverse decision, may be required to install additional control technologies to further minimize the impact.

Various state and federal laws regulate Detroit Edison’s handling, storage and disposal of its waste materials. The EPA and the Michigan Department of Environmental Quality (MDEQ) have aggressive programs to manage the clean up of contaminated property. Detroit Edison has extensive land holdings and, from time to time, must investigate claims of improperly disposed contaminants. Detroit Edison anticipates it will be periodically included in these types of environmental proceedings.

MichCon and Citizens

Prior to the construction of major natural gas pipelines, gas for heating and other uses was manufactured from processes involving coal, coke or oil. Enterprises (MichCon and Citizens, a wholly owned utility located in Adrian, Michigan) owns, or previously owned, 17 such former manufactured gas plant (MGP) sites. Investigations have revealed contamination related to the by-products of gas manufacturing at each site. Enterprises is remediating eight of the former MGP sites and is conducting more extensive investigations at three of the sites. Enterprises has received MDEQ closure of one site and a determination that it is not a responsible party for two other sites. While we cannot make any assurances, we believe that a cost deferral and rate recovery mechanism approved by the MPSC will prevent these costs from having a material adverse impact on our results of operations.

Other

Our non-regulated affiliates are subject to a number of environmental laws and regulations dealing with the protection of the environment from various pollutants. We believe these non-regulated affiliates are in substantial compliance with all environmental requirements.

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RISK FACTORS

There are various risks associated with the operations of DTE Energy’s regulated and non-regulated businesses. To provide a framework to understand the operating environment of DTE Energy, we are providing a brief explanation of the more significant risks associated with our businesses. Although we have tried to identify and discuss key risk factors, others could emerge in the future. Each of the following risks could affect our performance.

Weather — Weather significantly affects our operations. Deviations from normal hot and cold weather conditions affect our earnings and cash flow. Mild temperatures can result in decreased utilization of our assets, lowering income and cash flow. Damage due to ice storms, tornadoes, or high winds can damage our infrastructure and require us to perform emergency repairs and incur material unplanned expenses.

Regional and national economic conditions — Our businesses follow the economic cycles of the customers we serve. Should national or regional economic conditions decline, reduced volumes of electricity and gas we supply will result in decreased earnings and cash flow.

Environmental laws and liability — We are subject to numerous environmental regulations. These regulations govern air emissions, water quality, wastewater discharge, solid waste, and hazardous waste. Compliance with these regulations can significantly increase capital spending, operating expenses and plant down times. These laws and regulations require us to seek a variety of environmental licenses, permits, inspections, and other regulatory approvals. We may also incur liabilities because of our emission of gases that may cause changes in the climate, including issues related to global warming. The regulatory environment is subject to significant change, and therefore we cannot predict future issues.

Additionally, we may become a responsible party for environmental clean up at sites identified by a regulatory body. We cannot predict with certainty the amount and timing of future expenditures related to environmental matters because of the difficulty of estimating clean up costs. There is also uncertainty in quantifying liabilities under environmental laws that impose joint and several liability on all potentially responsible parties.

Operation of nuclear facilities — Ownership of an operating nuclear generating plant subjects Detroit Edison to significant additional risks. These risks among others, include plant security, environmental regulation and remediation, and operational factors than can significantly impact the performance and cost of operating a nuclear facility.

Section 29 tax credits — We have generated Section 29 tax credits from our synfuel, coke battery and biomass operations. Generating Section 29 tax credits is important to minimizing our income tax expense. We have received favorable private letter rulings on 7 of our 9 synfuel plants and expect the remaining two in 2003. The generation of tax credits is subject to review by the Internal Revenue Service. If we failed to prevail through the administrative and legal process, there could be additional tax liabilities owed for previously taken Section 29 tax credits which could impact our earnings and cash flows. The value of future credits generated may be affected by new tax legislation. The combination of overall industry audits of Section 29 credits, supply and demand for tax credits and new tax legislation could hinder our plan to sell interests in tax credit properties which could have an impact on our earnings and cash flows.

Rate regulation — We operate in a regulated industry. Our rates are set by the MPSC and cannot be increased without their authorization. We may be impacted by new regulations or interpretations by the MPSC, FERC or other regulatory bodies. New legislation, regulations or interpretations could change how our business operates, impact our ability to recover costs through rate increases or may require us to incur additional expenses.

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Competition — Deregulation and restructuring in the electric and gas industry, including customer choice programs could result in increased competition and unrecovered costs that could affect the financial condition, results of operations or cash flows of our regulated businesses.

Supply and price of raw materials — We are dependent on coal for much of our electrical generating capacity. Price fluctuation and supply disruptions could have a negative impact on our ability to profitably generate electricity. Our access to natural gas supplies is critical to ensure reliability of service for our regulated gas customers. We have hedging policies in place to mitigate negative fluctuations in commodity supply prices.

Labor relations — Unions represent a majority of our employees. A union choosing to strike as a negotiating tactic could have an impact on our business.

Unplanned outages — Unforeseen maintenance may be required to safely produce electricity or comply with environmental regulations. This occurrence could result in spot market purchases of electricity in excess of our costs of generation.

Access to capital markets and interest rates — Our ability to access capital markets is important to operate our businesses. Heightened concerns about the energy industry, the level of borrowing by other energy companies and the market as a whole could limit our access to capital markets. Changes in interest rates could increase our borrowing costs.

Upstream cash flows from subsidiaries — Cash flows from subsidiaries are required to pay interest expenses and dividends on DTE Energy debt and securities. Should a major subsidiary not be able to pay dividends or transfer cash flows to DTE Energy, our ability to pay dividends and interest would be restricted.

Property tax reform — We are one of the largest payers of property taxes in the state of Michigan. Should the legislature change how schools are financed, we could face increased property taxes on our Michigan facilities.

Credit ratings — Increased scrutiny of the energy industry and regulatory changes could result in credit agencies reexamining our credit rating. A change in our rating could restrict our ability to access capital markets at attractive rates and increase our borrowing costs.

Property insurance — While we seek to adequately insure our property, catastrophic damage as a result of acts of God, terrorism, war or a combination of significant unforeseen items occurring at one time could impact our operations and economic losses might not be covered in full by insurance.

Terrorism — Damage to downstream infrastructure or our own assets by terrorist groups would impact our operations. At Fermi 2, we have already increased security as a result of an NRC order and further security increases are expected. Additionally, we may assist other energy companies if terrorists were to strike their energy facilities.

Energy trading markets — Recent events in the energy trading industry have increased the level of scrutiny on the energy trading business and the energy industry as a whole. A decline in the confidence in the energy trading market along with stricter credit requirements has led to a decrease in the number of trading entities resulting in decreased liquidity in the energy trading market.

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EMPLOYEES

The table below shows our employees as of December 31, 2002:

There are several bargaining units for our represented employees. Of the 5,876 represented employees, 4,919 are under contracts that expire in June or October 2004. The contracts of the remaining represented employees expire in 2005.

EXECUTIVE OFFICERS OF DTE ENERGY

Under our By-Laws, the officers of DTE Energy are elected annually by the Board of Directors at a meeting held for such purpose, each to serve until the next annual meeting of directors or until their respective successors are chosen and qualified. With the exception of Messrs. Peterson and Ewing, all of the above officers have been employed by DTE Energy in one or more management capacities during the past five years.

Stephen E. Ewing was elected group president for DTE Energy Gas on May 31, 2001. He joined DTE Energy having previously served as president and chief operating officer of MCN Energy and president and chief executive officer of MichCon during the previous five years.

Bruce D. Peterson was elected Senior Vice President and General Counsel on June 25, 2002. Mr. Peterson was a partner with Hunton & Williams in Washington, D.C. prior to joining DTE Energy. He joined Hunton & Williams in 1982 and later rejoined that firm in 1988 after serving in the U.S. Foreign Service, Department of State.

Pursuant to Article VI of our Articles of Incorporation, directors of DTE Energy will not be personally liable to the company or its shareholders in the performance of their duties to the full extent permitted by law.

Article VII of our Articles of Incorporation provides that each current or former director or officer of DTE Energy, or each current and former employee or agent of the company or a director, officer, employee or

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agent of another corporation, partnership, joint venture, trust or other enterprise (including the heirs, executors, administrators or estate of such person), shall be indemnified by the company to the full extent permitted by the Michigan Business Corporation Act or any other applicable laws as presently or hereafter in effect. In addition, we have entered into indemnification agreements with all of our officers and directors, these agreements set forth procedures for claims for indemnification as well as contractually obligating us to provide indemnification to the maximum extent permissible by law.

We and our directors and officers in their capacities as such are insured against liability for alleged wrongful acts (to the extent defined) under three insurance policies providing aggregate coverage in the amount of $100 million.

Item 3. Legal Proceedings

We are involved in certain legal (including commercial matters), administrative and environmental proceedings before various courts, arbitration panels and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include contract disputes, environmental reviews and investigations, and pending judicial matters. We cannot predict the final disposition of such proceedings. We regularly review legal matters and record provisions for claims that are considered probable of loss. The resolution of pending proceedings is not expected to have a material effect on our financial statements in the period they are resolved. For additional discussion on legal matters, see the following Notes to the Consolidated Financial Statements:

Item 4. Submission of Matters to a Vote of Security Holders

We did not submit any matters to a vote of security holders in the fourth quarter of 2002.

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Part II

Item 5. Market for Registrant’s Common Equity and Related Stockholder Matters

Our common stock is listed on the New York Stock Exchange, which is the principal market for such stock, and the Chicago Stock Exchange. The following table indicates the reported high and low sales prices of our Common Stock on the Composite Tape of the New York Stock Exchange and dividends paid per share for each quarterly period during the past two years: