Power of Attorney


STATE OF MICHIGAN    )
                     )  SS
COUNTY OF WAYNE      )

    KNOW ALL BY THESE PRESENTS that I, Bruce D. Peterson, do hereby constitute
and appoint Sandra K. Ennis, Thomas A. Hughes, Bruce D. Peterson and Sharon L.
Sabat, and each of them, my true and lawful Attorneys-in-Fact with full power of
substitution to execute and file on my behalf with the Securities and Exchange
Commission any and all reports, including without limiting the generality of the
foregoing, reports on Securities and Exchange Commission Forms 3, 4 and 5 and
144, that may be required or advisable in connection with my holdings in and
transactions related to securities of DTE Energy Company.

    This Power of Attorney is in full force and effect until revoked by the
undersigned in a signed writing delivered to such attorney-in-fact.

    IN WITNESS THEREOF, I have hereto set my hand this 28th day of June, 2007.

                          /s/Bruce D. Peterson
                          Bruce D. Peterson


Witnesses:

/s/Kay Heil
Kay Heil

/s/Elizabeth M. Querin
Elizabeth M. Querin

STATE OF MICHIGAN    )
                     )  SS
COUNTY OF WAYNE      )

On this 28th day of June, 2007, before me personally appeared Bruce D. Peterson,
to me known to be the person described who executed the foregoing Power of
Attorney.

              Subscribed and sworn to before me
              the 28th day of June, 2007.

              /s/Audrey B. MacMechan
              Audrey B. MacMechan
              Notary Public - Wayne County
              My Commission Expires:  06-19-2013