UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Form 10-K/A

FOR ANNUAL AND TRANSITION REPORTS
PURSUANT TO SECTIONS 13 OR 15(d) OF THE
SECURITIES EXCHANGE OF 1934

For the fiscal year ended December 31, 2004

Commission file number 1-11607

DTE ENERGY COMPANY

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 þ 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 the 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. þ

     Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes þ No o

     On June 30, 2004, the aggregate market value of the Registrant’s voting and non-voting common equity held by non-affiliates was approximately $7.0 billion (based on the New York Stock Exchange closing price on such date). There were 174,175,040 shares of common stock outstanding at March 31, 2005, substantially all held by non-affiliates.

DOCUMENTS INCORPORATED IN THIS AMENDMENT BY REFERENCE
None

TABLE OF CONTENTS

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Table of Contents

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Integrated Framework. Based on our assessment, management believes that, as of December 31, 2004, the Company’s internal control over financial reporting was effective based on those criteria.

Our management’s assessment of the effectiveness of the Company’s internal control over financial reporting has been audited by the Company’s independent auditors, as stated in their report which is included in the 2004 10-K.

(c) Changes in internal control over financial reporting

The Company has established a formal assessment process and related procedures to evaluate the effectiveness of internal control over financial reporting using criteria specified by COSO. The assessment process is comprehensive in scope, utilizes internal and external resources and involves many individuals at various levels of the Company in the design, testing and evaluation of internal control.

As part of the evaluation and assessment process, the Company has been improving the design and operating effectiveness of many entity-level and process-level controls. Control testing and remediation activities provide reasonable, but not absolute, assurance that a material weakness in internal control over financial reporting will be avoided. The inherent limitations of our current internal controls, a portion of which are manual by their nature, contribute to the potential for control deficiencies. Management does not believe any areas requiring further improvement constitute a material weakness in internal control over financial reporting as of December 31, 2004.

There has been no change in the Company’s internal control over financial reporting during the fourth quarter of 2004 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART IV

Item 15. Exhibits and Financial Statement Schedules

(b) The following exhibits are filed as part of this Form 10-K/A.

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Signatures

Pursuant to the requirements of Section 13 or 15(d) 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.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.

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