Document:

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                                                                    EXHIBIT 10.9

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN
                 (AS RESTATED EFFECTIVE AS OF DECEMBER 15, 1999)

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                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

SECTION                                                                                                    PAGE
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<S>                                                                                                        <C>
ARTICLE 1 - TITLE...........................................................................................1

ARTICLE 2 - DEFINITIONS.....................................................................................1

ARTICLE 3 - PURPOSE.........................................................................................1

ARTICLE 4 - EFFECTIVE DATE..................................................................................2

ARTICLE 5 - PARTICIPATION...................................................................................2

            Section 5.1 Eligibility to Participate..........................................................2
            Section 5.2 Election to Participate.............................................................2

ARTICLE 6 - PARTICIPANTS' ACCOUNTS..........................................................................3

            Section 6.1 Establishment of Accounts and Subordination of Executive's
                    Rights..................................................................................3
            Section 6.2 Credits and Debits to Participants' Accounts........................................3
            Section 6.3 Election of Accounts................................................................4
            Section 6.4 Change of Election for Accounts.....................................................5
            Section 6.5 Transfers Between Accounts..........................................................5

ARTICLE 7 - HARDSHIP WITHDRAWALS............................................................................5

ARTICLE 8 - VESTING AND PAYMENT OF BENEFITS.................................................................6

            Section 8.1 Form and Timing of Payments.........................................................6
            Section 8.2 Change in Payment Options...........................................................7
            Section 8.3 Payments Subject to Golden Parachute Provisions.....................................7
            Section 8.4 Vested Portion of Participants' Accounts............................................7
            Section 8.5 Recrediting of Forfeited Amounts....................................................7
            Section 8.6 Transfer to an Affiliated Company...................................................8

ARTICLE 9 - BENEFICIARY IN THE EVENT OF DEATH...............................................................8

ARTICLE 10 - ADMINISTRATION.................................................................................9

ARTICLE 11 - AMENDMENT AND TERMINATION......................................................................9
</TABLE>

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<TABLE>
<S>                                                                                                       <C>
ARTICLE 12 - MISCELLANEOUS..................................................................................9

             Section 12.1 Non-Assignability.................................................................9
             Section 12.2 No Employment Rights.............................................................10
             Section 12.3 Law Applicable...................................................................10
             Section 12.4 Legal Fees and Expenses..........................................................10
             Section 12.5 Successors.......................................................................10

ARTICLE 13 - CHANGE IN CONTROL PROVISIONS..................................................................10

             Section 13.1 General..........................................................................10
             Section 13.2 Transfer to Rabbi Trust..........................................................10
             Section 13.3 Lump Sum Payments................................................................11
             Section 13.4 Joint and Several Liability......................................................11
             Section 13.5 Dispute Procedures...............................................................11
             Section 13.6 Definition of Change in Control..................................................11

Historical Background
</TABLE>

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<PAGE>   4

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN
                 (AS RESTATED EFFECTIVE AS OF DECEMBER 15, 1999)

         WHEREAS, MCN Energy Group Inc. (the "Company") has previously adopted
the MichCon Supplemental Savings Plan and the Company desires to make certain
changes in the plan.

         NOW, THEREFORE, effective December 15, 1999, the MichCon Supplemental
Savings Plan is hereby amended and restated as follows:

                                    ARTICLE 1
                                      TITLE

         The title of this Plan shall be the "MCN Energy Group Supplemental
Savings Plan" and shall be referred to in this document as the "Plan".

                                    ARTICLE 2
                                   DEFINITIONS

         The words and phrases used in the Plan shall have the same meanings as
provided under Article 2 of the MCN Energy Group Savings and Stock Ownership
Plan (the "Qualified Plan"), as amended from time to time, unless otherwise
defined in the Plan or the context clearly requires otherwise.

                                    ARTICLE 3
                                     PURPOSE

         The principal purpose of the Plan is to provide deferred compensation
for a select group of management or highly compensated Employees of the Company
and any other Employer that has adopted the Plan with the consent of the Company
who has been specifically designated by the

<PAGE>   5

Committee to be eligible for Plan participation (an "Executive"). Such an
employee shall remain an Executive so long as this designation is not revoked by
the Committee.

It is intended that this Plan provide benefits for "a select group of management
or highly compensated employees" within the meaning of Section 201, 301 and 401
of ERISA and, therefore, to be exempt from the provisions of Parts 2, 3, and 4
of Title I of ERISA.

                                    ARTICLE 4
                                 EFFECTIVE DATE

         The original effective date of the Plan for the Company was May 31,
1988, and for any other Employer shall be the date established by such Employer
at the time of adoption of the Plan.

                                    ARTICLE 5
                                  PARTICIPATION

         Section 5.1 Eligibility to Participate. Only the following individuals
shall be eligible to participate in the Plan: (a) any Executive whose
contributions under the Qualified Plan are limited because of the limitation on
compensation under Section 401(a)(17) of the Code, the limitation on elective
deferrals under Section 402(g) of the Code, the limitation on benefits and
contributions under Section 415 of the Code, or any other provision of the Code
or other law that the Committee hereafter designates; and (b) such other
management or highly compensated Employees as shall be approved by the Chief
Executive Officer of an Employer that has adopted the Plan.

         Section 5.2 Election to Participate. An Executive who is eligible to
participate may become a participant in the Plan (a "Participant") by filing a
written election with the Committee on a form approved by the Committee. The
Executive's election shall authorize the Employer to defer the amount of such
Executive's Eligible Compensation pursuant to Section 6.2(a) and (c) hereof and
shall evidence the Executive's acceptance of and agreement to all the provisions
of the Plan.

<PAGE>   6

         The Executive's election must be made no later than December 31 of the
year that immediately precedes the year for which it applies. However, the first
election by any Executive to participate in this Plan shall be effective for
Eligible Compensation earned after the election is received by the Committee and
after contributions to the Qualified Plan are limited in accordance with Section
5.1(a) above. An election shall be irrevocable for the current calendar year. An
election shall be irrevocable for future calendar years unless a written
revocation is filed with the Committee prior to the first day of the calendar
year for which the revocation is desired.

                                    ARTICLE 6
                             PARTICIPANTS' ACCOUNTS

         Section 6.1 Establishment of Accounts. The Employer shall establish
accounts for each of its Executives who is a Participant in the Plan. Separate
accounts corresponding in name to the separate funds under the Qualified Plan
shall be maintained for each Participant. Credits under Sections 6.2(a) and (b)
shall also be maintained in separate accounts. The accounts shall be maintained
as unfunded bookkeeping accounts and all amounts represented by the accounts
shall remain a part of the general funds of the Employer of such Participant,
subject to the claims of its general creditors. Nothing in the Plan and no
action taken pursuant to the provisions of the Plan shall be deemed to create a
trust or fund of any kind or to create any fiduciary relationship. The
obligation to make payments under this Plan shall be and remain an unsecured,
unfunded general obligation of the Employer of the particular Participant. Each
Executive who is a Participant in the Plan shall be provided an annual statement
of the unfunded accounts maintained for the Participant.

         Section 6.2 Credits and Debits to Participants' Accounts. As of the end
of a pay period, total credits shall be made to the accounts maintained for a
Participant as set forth below:

         (a)       An amount equal to the difference between (1) and (2) below:

                        (1)  the amount that such Participant would have
                   contributed to the Qualified Plan for such pay period,
                   assuming (x) the Participant satisfied the eligibility
                   requirements set forth in Section 3.1 of the Qualified Plan
                   and (y) the allotments

                                       3
<PAGE>   7

                   of such Participant under the Qualified Plan were not limited
                   by the application of the any restriction set forth in
                   Section 5.1(a), or any provision of the Qualified Plan
                   relating to the limitations described in Section 5.1(a)
                   above;

                        (2)  the amount that such Participant actually
                   contributed to the Qualified Plan for such pay period.

         (b)       An amount equal to the difference between (1) and (2) below:

                        (1)  the amount that the Employer of such Participant
                   would have contributed to the Qualified Plan on behalf of
                   such Participant for such pay period if the Participant had
                   contributed the amount set forth in (a)(1) above to the
                   Qualified Plan during such pay period;

                        (2)  the amount that the Employer actually contributed
                   to the Qualified Plan on behalf of such Participant for such
                   pay period.

         The total credits under (a) and (b) of this Section shall be allocated
to the specific accounts elected by the Participant as provided under Section
6.3 hereof. Each account shall be credited with an amount representing earnings
or debited with an amount representing losses on a daily basis. Earnings or
losses for a pay period shall be calculated using the daily valuation
methodology employed by the recordkeeper for each corresponding fund under the
Qualified Plan.

         Section 6.3 Election of Accounts. Each Participant shall, by filing a
written election with the Committee, on a form approved by the Committee, elect
the accounts which are to be used for recording credits under Sections 6.2(a)
and (b) hereof.

         A Participant may direct that credits under Sections 6.2(a) and (b) may
be made to any account corresponding in name to the funds under the Qualified
Plan that are available to accept contributions or allotments. Notwithstanding
the foregoing, a Participant must at all times maintain an aggregate balance in
the MCN Stock fund in the Qualified Plan or the MCN Stock account in this Plan
or a combination of both such plans in an amount at least equal to the sum of
the Employer contributions made pursuant to Section 4.3(a) of the Qualified Plan
after April 1, 1989, plus seventy-five percent of

                                       4
<PAGE>   8

the credits recorded under Section 6.2(b) of this Plan (or the corresponding
Predecessor provision) after April 1, 1989. This balance may be maintained in
the Qualified Plan, this Plan, or a combination of both such plans, at the
discretion of the Participant.

         Section 6.4 Change of Election for Accounts. Any election of accounts
given by a Participant under the preceding Section shall be deemed to be a
continuing election until changed by the Participant. A Participant may change
any such election as of any normal business day of any month by giving prior
notice of such change to the Plan recordkeeper in the form prescribed by the
Committee.

         Section 6.5 Transfers Between Accounts. Transfers between accounts
shall be effected on any normal business day of any month upon directions to the
Plan recordkeeper in the form prescribed by the Committee.

         A Participant may not transfer any amount from the MCN Stock account if
the balance remaining in such account after the transfer would be less than the
amount required to be credited to such account under Section 6.3 hereof, plus
the earnings thereon.

                                    ARTICLE 7
                              HARDSHIP WITHDRAWALS

         A Participant may request, upon 20 days written notice to the
Committee, a withdrawal from his or her accounts if the withdrawal is on account
of financial hardship as defined under the Qualified Plan. A financial hardship
shall first be satisfied from the MCN Executive Deferred Compensation Plan to
the extent possible; then from the Plan; and finally from the Qualified Plan.
The amount of such withdrawal shall be limited to the amounts deferred under
Section 6.2(a) hereof, or the total value of the accounts maintained under
Section 6.2(a) hereof as of the end of the prior month, whichever is smaller.

                                       5

<PAGE>   9

         The determination of the existence of financial hardship and the amount
required to be distributed to meet the need created by the hardship shall be
made by the Committee. All determinations regarding financial hardship shall be
made in accordance with written procedures established by the Committee for
hardship withdrawals from the Qualified Plan and shall be applied in a uniform
and nondiscriminatory manner. Such written procedures shall specify the
requirements for requesting and receiving withdrawals on account of financial
hardship, including the forms that must be submitted, and to whom the forms are
to be submitted. No other withdrawals or loans are permitted under this Plan.

                                    ARTICLE 8
                         VESTING AND PAYMENT OF BENEFITS

         Section 8.1 Form and Timing of Payment. On the date that a Participant
becomes entitled, pursuant to either Section 9.1 or 9.2 of the Qualified Plan
(the "Retirement Date"), to a distribution of his or her account in the
Qualified Plan, such Participant shall be entitled to receive the vested portion
of the amount credited to his or her accounts in the Plan. All distributions
shall be paid out at the end of the quarter in which the Participant's
Retirement Date occurs. As of the end of the quarter in which his Retirement
Date occurs, the Participant's Account shall be valued on a cash basis with
interest credited annually at a rate equal to the average interest rate of
ten-year U.S. Treasury Notes for the November of the prior calendar year, or
such other rate as set by the Committee (the "Plan Interest Rate"). Payment of
the vested portion of a Participant's accounts shall be made in accordance with
the Participant's selection on his Benefit Agreement either in annual payments
over a period not less than one year and not more than 15 years, or in one lump
sum by the Employer maintaining the accounts. If no payment election has been
made, the vested portion of the Participant's account shall be paid in one lump
sum. The amount of the annual payments shall be calculated to pay out over the
specified period the entire balance in the Participant's Account as of his
Retirement Date with interest credited annually on the declining balance at the
Plan Interest Rate. The Participant's Account shall continue to be credited
annually with interest at the Plan Interest Rate and charged with the annual
payments to the Participant. The amount of the annual payments to the
Participant shall be adjusted at the end of the quarter in which the anniversary
of the Participant's retirement date

                                       6
<PAGE>   10

occurs to reflect changes in the Plan Interest Rate and other changes in the
Participant's Account balance.

         Section 8.2. Change in Payment Option. The payment option selected by
the Participant may be changed at any time by the Participant submitting a new
payment selection to the Committee, however, a change shall be effective only if
it is received by the Committee at least 12 months before payments under the
Plan commence.

         Section 8.3 Payments Subject to Golden Parachute Provisions.
Notwithstanding the above, if payment at the time specified in the first
sentence of this paragraph would subject the Participant to the excise tax under
Section 4999 of the Code, payment of the vested portion of a Participant's
accounts shall be deferred until the earlier of (a) the date that would have
been the Participant's Normal Retirement Date, Early Retirement Date or
Disability Retirement Date, (b) death of the Participant, or (c) total and
permanent disability or legally established mental incompetency of the
Participant.

         Section 8.4 Vested Portion of Participants' Accounts. The vested
portion of a Participant's account shall mean: (i) the total value of the
accounts of a Participant who is entitled to a distribution pursuant to Section
9.1 of the Qualified Plan; or (ii) with respect to a Participant who is entitled
to a distribution pursuant to Section 9.2 of the Qualified Plan, the total value
of the account maintained under Section 6.2(a) hereof. Notwithstanding the
foregoing, the total value of the accounts of a Participant shall become
nonforfeitable as of the date on which the Participant attains age 65.

         Section 8.5 Recrediting of Forfeited Amounts. If a Participant entitled
to a distribution pursuant to Section 9.2 of the Qualified Plan receives the
vested portion of the amount credited to his or her accounts in the Plan,
forfeits the remainder, and is thereafter reemployed prior to incurring five
consecutive Break in Service Years, then as of the end of the month coincident
with or next following the Participant's date of reemployment, the amount of the
Participant's accounts that was forfeited upon the earlier termination of
employment shall be credited to the Participant's accounts. Interest shall not
accrue on such amount between the time it was forfeited and the time at which it
was recredited.

                                       7
<PAGE>   11

         Section 8.6 Transfer to an Affiliated Company. Benefits for a
Participant who transfers employment from one Employer to an Affiliated Company
shall be subject to Section 3.8 of the Qualified Plan. Such a transfer of
employment shall cause a transfer of the accounts maintained by an Employer for
a Participant if the new Employer has adopted the Plan and the former Employer
transfers cash to the new Employer equal to the amount of the accounts
transferred. In all other events, a transfer of employment shall not cause a
transfer of the accounts maintained by an Employer for a Participant.

                                    ARTICLE 9
                        BENEFICIARY IN THE EVENT OF DEATH

         Each Participant shall have the right to designate a beneficiary or
beneficiaries to receive any distribution to be made under Article 8 upon the
death of such Participant, or, in the case of a Participant who dies subsequent
to termination of his or her employment but prior to the distribution of the
entire amount to which the Participant is entitled under the Plan, any
undistributed balance to which such Participant would have been entitled. Each
Participant shall also have the right to designate a contingent beneficiary in
the event any of the primary beneficiaries predecease the Participant or die
prior to complete disbursement of the Participant's account.

         If no beneficiary has been named by a Participant at the time of the
Participant's death, or if the beneficiary designated by the Participant has
predeceased the Participant or such designated beneficiary has died prior to
complete disbursement of the Participant's accounts and the Participant has
failed to name a contingent beneficiary, the value of the Participant's
accounts, or the undistributed portion thereof, shall be paid by the Employer to
the deceased employee's lawful successor(s) in interest in a lump sum as soon as
practicable, but in no event later than one year following the employee's death.

                                       8
<PAGE>   12
                                   ARTICLE 10
                                 ADMINISTRATION

         The Plan shall be administered by the Committee appointed pursuant to
the provisions of Section 10.1 of the Qualified Plan. The Committee shall have
the same powers and duties, and shall be subject to the same limitations, as are
described in the Qualified Plan. However, unlike the limitation on the
Committee's power to amend or modify the Qualified Plan under Section 11.1 of
the Qualified Plan, the Committee shall have full power to amend or modify the
Plan in all respects.

                                   ARTICLE 11
                            AMENDMENT AND TERMINATION

         The Company may amend or terminate the Plan at any time and for any
reason. The power to amend or modify the Plan shall rest solely with the
Committee. No such amendment or termination shall affect the rights of
Participants or beneficiaries to the vested portion of amounts credited to
Participants' accounts as of the date of such amendment or termination. In the
event of a termination of the Plan, all amounts credited to a Participant's
accounts shall be fully vested.

                                   ARTICLE 12
                                  MISCELLANEOUS

          12.1 Non-Assignability. This Plan shall be subject to the same terms
and conditions as specified in Section 15.4 of the Qualified Plan, and said
Section is hereby incorporated by reference.

         Section 12.2 No Employment Rights. Nothing contained in the Plan and no
action taken pursuant to the provisions of the Plan shall be construed as a
contract of employment between the Employer and an Employee, or as a right of
any Employee to be continued in the employment of the Employer, or as a
limitation of the right of the Employer to discharge any of its Employees at any
time, with or without cause, or as a limitation of the right of the Employee to
terminate employment at any time.

                                       9
<PAGE>   13

         Section 12.3 Law Applicable. This Plan and all actions hereunder shall
be governed by and construed according to the laws of the State of Michigan.

         Section 12.4 Legal Fees and Expenses. The Company shall pay all legal
fees and expenses which a Participant may incur as a result of the Company
contesting the validity, enforceability, or the Participant's interpretation of,
or determinations under this Plan other than the hardship withdrawal provisions
hereof.

         Section 12.5 Successors. In the event of any consolidation, merger,
acquisition or reorganization of the Company, the obligations of the Company
under this Plan shall continue and be binding upon the Company and its
successors.

                                   ARTICLE 13
                          CHANGE IN CONTROL PROVISIONS

         Section 13.1 General. In the event of a Change in Control, as defined
in Section 13.6, then, notwithstanding any other provision of the Plan, the
provisions of this Section 13 shall be applicable and shall supersede any
conflicting provisions of the Plan.

         Section 13.2 Transfer to Rabbi Trust. MCN Energy Group Inc. ("MCN") has
established a trust pursuant to a Trust Agreement dated January 3, 1991 (the
"Rabbi Trust"). The terms of the Rabbi Trust provide that, in the event of a
Change in Control and thereafter, assets are to be transferred to such trust to
provide benefits under the Plan. MCN shall make all transfers of funds required
by the Rabbi Trust in a timely manner and shall otherwise abide by the terms of
the Rabbi Trust.

         Section 13.3 Lump Sum Payments. In a Change in Control situation, the
Chairman of MCN shall have the absolute discretion to direct that a lump sum
payment be made to a Participant up to the total value of such Participant's
Account in the year of the Change in

                                       10
<PAGE>   14

Control if such payment will reduce the amount of any potential excise tax
imposed by Code Section 4999.

         Section 13.4 Joint and Several Liability. Upon and at all times after a
Change in Control, the liability under the Plan of MCN and each Affiliated
Employer that has adopted the Plan shall be joint and several so that MCN and
each such Affiliated Employer shall each be liable for all obligations under the
Plan to each employee covered by the Plan, regardless of the corporation by
which such employee is employed.

         Section 13.5 Dispute Procedures. In the event that, upon or at any time
subsequent to a Change in Control, a claim for benefits under the Plan of a
Participant or distributee who has exhausted the claims and appeals procedures
set forth in Section 10.6 of the Qualified Plan is denied in whole or in part,
the following additional procedures shall be applicable:

              (a)  Any amount that is not in dispute shall be paid to the
         Participant or distributee at the time or times provided herein.

              (b)  MCN shall advance to such claimant from time to time such
         amounts as shall be required to reimburse the claimant for reasonable
         legal fees, costs and expenses incurred by such claimant in seeking a
         judicial resolution of his or her claim, including reasonable fees,
         costs and expenses relating to appeals; provided, however, that MCN
         shall not be obligated to advance to the claimant any amounts under
         this Section 13.4(b) unless and until the claimant agrees in writing to
         repay to MCN, immediately upon the occurrence of a final judicial
         determination with respect to such dispute, any amount of such fees,
         costs and expenses that is not awarded to such claimant in a final
         order of a court of competent jurisdiction.

         Section 13.6   Definition of Change in Control.  A "Change of Control"
means:

                                       11
<PAGE>   15

              (a)  The acquisition by any individual, entity or group (within
         the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange
         Act of 1934, as amended (the "Exchange Act")) (a "Person") of
         beneficial ownership (within the meaning of Rule 13d-3 promulgated
         under the Exchange Act) of 20% or more of either (i) the then
         outstanding shares of common stock of MCN (the "Outstanding MCN Common
         Stock") or (ii) the combined voting power of the then outstanding
         voting securities of MCN entitled to vote generally in the election of
         directors (the "Outstanding MCN Voting Securities"); provided, however,
         that the following acquisitions shall not constitute a Change of
         Control: (A) any acquisition directly from MCN (excluding any
         acquisition by virtue of the exercise of a conversion privilege), (B)
         any acquisition by MCN, (C) any acquisition by any employee benefit
         plan (or related trust) sponsored or maintained by MCN or any
         corporation controlled by MCN or (D) any acquisition by any corporation
         pursuant to a reorganization, merger or consolidation, if, following
         such reorganization, merger or consolidation, the conditions described
         in clauses (i), (ii) and (iii) of subsection (c) of this Section 13.6
         are satisfied; or

              (b)  Individuals who, as of the date hereof, constitute the Board
         of Directors of MCN (the "Incumbent Board") cease for any reason to
         constitute at least a majority of the Board; provided, however, that
         any individual becoming a director subsequent to the date hereof whose
         election, or nomination for election by MCN's shareholders, was
         approved by a vote of at least a majority of the directors then
         comprising the Incumbent Board shall be considered as though such
         individual were a member of the Incumbent Board, but excluding, for
         this purpose, any such individual whose initial assumption of office
         occurs as a result of either an actual or threatened election contest
         (as such terms are used in Rule 14a-11 of Regulation 14A promulgated
         under the Exchange Act) or other actual or threatened solicitation of
         proxies or consents by or on behalf of a Person other than the Board;
         or

              (c)  Approval by the shareholders of MCN of a reorganization,
         merger or consolidation, in each case, unless, following such
         reorganization, merger or

                                       12
<PAGE>   16

         consolidation, (i) more than 60% of, respectively, the then outstanding
         shares of common stock of the corporation resulting from such
         reorganization, merger or consolidation and the combined voting power
         of the then outstanding voting securities of such corporation entitled
         to vote generally in the election of directors is then beneficially
         owned, directly or indirectly, by all or substantially all of the
         individuals and entities who were the beneficial owners, respectively,
         of the Outstanding MCN Common Stock and Outstanding MCN Voting
         Securities immediately prior to such reorganization, merger or
         consolidation in substantially the same proportions as their ownership,
         immediately prior to such reorganization, merger or consolidation, of
         the Outstanding MCN Common Stock and Outstanding MCN Voting Securities,
         as the case may be, (ii) no Person (excluding MCN, any employee benefit
         plan or related trust sponsored or maintained by MCN or any corporation
         controlled by MCN or such corporation resulting from such
         reorganization, merger or consolidation and any Person beneficially
         owning, immediately prior to such reorganization, merger or
         consolidation, directly or indirectly, 20% or more of the Outstanding
         MCN Common Stock or Outstanding MCN Voting Securities, as the case may
         be) beneficially owns, directly or indirectly, 20% or more of,
         respectively, the then outstanding shares of common stock of the
         corporation resulting from such reorganization, merger or consolidation
         or the combined voting power of the then outstanding voting securities
         of such corporation entitled to vote generally in the election of
         directors and (iii) at least a majority of the members of the board of
         directors of the corporation resulting from such reorganization, merger
         or consolidation were members of the Incumbent Board at the time of the
         execution of the initial agreement providing for such reorganization,
         merger or consolidation; or

              (d)  Approval by the shareholders of MCN of (i) a complete
         liquidation or dissolution of MCN or (ii) the sale or other disposition
         of all or substantially all of the assets of MCN, other than to a
         corporation, with respect to which following such sale or other
         disposition, (A) more than 60% of, respectively, the then outstanding
         shares of common stock of such corporation and the combined voting
         power of the then

                                       13
<PAGE>   17
         outstanding voting securities of such corporation entitled to vote
         generally in the election of directors is then beneficially owned,
         directly or indirectly, by all or substantially all of the individuals
         and entities who were the beneficial owners, respectively, of the
         Outstanding MCN Common Stock and Outstanding MCN Voting Securities
         immediately prior to such sale or other disposition in substantially
         the same proportion as their ownership, immediately prior to such sale
         or other disposition, of the Outstanding MCN Common Stock and
         Outstanding MCN Voting Securities, as the case may be, (B) no Person
         (excluding MCN Corporation, any employee benefit plan or related trust
         sponsored or maintained by MCN or any corporation controlled by MCN or
         such corporation resulting from such reorganization, merger or
         consolidation and any Person beneficially owning, immediately prior to
         such sale or other disposition, directly or indirectly, 20% or more of
         the Outstanding MCN Common Stock or Outstanding MCN Voting Securities,
         as the case may be) beneficially owns, directly or indirectly, 20% or
         more of, respectively, the then outstanding shares of common stock of
         such corporation and the combined voting power of the then outstanding
         voting securities of such corporation entitled to vote generally in the
         election of directors and (C) at least a majority of the members of the
         board of directors of such corporation were members of the Incumbent
         Board at the time of the execution of the initial agreement or action
         of the Board providing for such sale or other disposition of assets of
         MCN.

         IN WITNESS WHEREOF, the undersigned officer of the Company has executed
this Plan as of this 15th day of December, 1999.

                                  MCN ENERGY GROUP INC.

                                  By:
                                     -----------------------------------------
                                      Daniel L. Schiffer, Senior Vice President,
                                      General Counsel and Secretary

Restated: December 15, 1999

                                       14
<PAGE>   18

                              MCN ENERGY GROUP INC.
                            SUPPLEMENTAL SAVINGS PLAN

                              Historical Background

07/01/89          Plan amended and restated.

02/28/90          MCN Corporation Minutes of Regular Meeting of Board of
                  Directors - authorization for amendment regarding "Change in
                  Control" language (Section 13).

08/01/91          Plan amended and restated per MCN Corporation Minutes of
                  Regular Meeting of Board of Directors authorization for
                  amendment providing participants the option of receiving
                  essentially the same returns as available under the MichCon
                  Savings Plan, to require that participants maintain at least
                  75% of the employer matching portion in the Corporation's
                  common stock, and to conform the hardship withdrawal
                  provisions to new Treasury Regulations.

01/01/92          Amendment to Section 5.3, inserting at the end of Section 5.3
                  "and, when the Qualified Plan is amended to permit increased
                  Voluntary Deductions or Salary Reduction a change submitted
                  prior to the effective date of such amendments."

08/15/92          Plan restated.

01/01/97          Plan amended and restated per MCN Corporation Minutes of
                  Regular Meeting of Board of Directors as follows:

                  Article 1 is amended to reflect the change in the name of the
                  Plan to the "MCN Energy Group Inc. Supplemental Savings Plan".

                  Article 3 is amended to read as follows:

                        The principal purpose of the Plan is to provide deferred
                        compensation for a select group of management or highly
                        compensated Employees of the Company and any other
                        Employer that has adopted the Plan with the consent of
                        the Company who has been specifically designated by the
                        Committee to be eligible for Plan participation (an
                        "Executive"). Such an employee shall remain an Executive
                        so long as this designation is not revoked by the
                        Committee.

                        It is intended that this Plan provide benefits for "a
                        select group of management or highly compensated
                        employees" within the meaning of Section 201, 301 and
                        401 of ERISA and, therefore, to be exempt from the
                        provisions of Parts 2, 3, and 4 of Title I of ERISA.

                  Section 5.3 is amended to read as follows:

                        Section 5.3 Restriction on Change Deferrals Under the
                        Plan. The amount to be deferred by an Executive for a
                        Plan year shall be determined using the percentage of
                        his or her Compensation Rate in effect as of the
                        December 31 of the year which immediately precedes

<PAGE>   19

                        the year for which it applies. An Executive who elects
                        to participate in the Plan may not, after the effective
                        date of such election, change the percentage of his or
                        her Compensation Rate deferred under the Qualified Plan
                        to affect the amount to be deferred under the Plan
                        except for a change submitted prior to the first day of
                        the calendar year for which the change is desired, and,
                        when the Qualified Plan is amended to permit increased
                        Voluntary Reductions or Salary Reductions and such
                        change is submitted prior to the effective date of such
                        amendments. Any such other change in the percentage of
                        his or her Compensation Rate deferred under the
                        Qualified Plan shall be ignored for deferral purposes
                        under the Plan.

                  The heading of Section 6.1 is amended to read as follows:

                        Section 6.1  Establishment of Accounts and Subordination
                        of Executive's Rights.

                  Section 6.2 is amended to move the first paragraph to the end
                  of the section and to add a subparagraph (c) as follows:

                             (c) An amount of compensation equal to the
                             distribution of dividends on the MCN Stock held in
                             a Participant's Plan Account under the Qualified
                             Plan to the extent the Executive has not elected or
                             was ineligible to make Additional Allotments and
                             the Executive has elected to contribute such amount
                             to the Plan.

                             The total credits under (a) and (b) of this Section
                        shall be allocated to the specific accounts elected by
                        the Participant as provided under Section 6.3 hereof.
                        The credits under (c) of the Section shall be allocated
                        to the MCN Stock account in the Plan

                  Section 6.4 is amended as follows:

                        Any election of accounts given by a Participant under
                        the preceding Section shall be deemed to be a continuing
                        election until changed by the Participant. A Participant
                        may change any such election as of any normal business
                        day of any month by giving prior notice of such change
                        to the Plan recordkeeper in the form prescribed by the
                        Committee.

                  Article 7 is amended to add the following after the first
                  sentence in the article:

                        A financial hardship shall be satisfied from the MCN
                        Executive Deferred Compensation Plan to the extent
                        possible; then from the Plan; and finally from the
                        Qualified Plan.

                  Article 8 is amended to divide the information into sections
                  as follows:

<PAGE>   20

                             Section 8.1 Form and Timing of Payment. On the date
                        that a Participant becomes entitled, pursuant to either
                        Section 9.1 or 9.2 of the Qualified Plan (the
                        "Retirement Date"), to a distribution of his or her
                        account in the Qualified Plan, such Participant shall be
                        entitled to receive the vested portion of the amount
                        credited to his or her accounts in the Plan commencing
                        on the first of the month following the month in which
                        his Retirement Date occurs. As of the first of the month
                        following the month in which his Retirement Date occurs,
                        the Participant's Account shall be valued on a cash
                        basis with interest credited monthly at a rate equal to
                        the interest rate for the latest issue, as of the end of
                        the previous month, of ten-year U.S. Treasury Notes, or
                        such other rate as set by the Committee (the "Plan
                        Interest Rate"). Payment of the vested portion of a
                        Participant's accounts shall be made in accordance with
                        the Participant's selection on his Benefit Agreement
                        either in monthly payments in one-year increments, not
                        to exceed 15 years, or in one lump sum by the Employer
                        maintaining the accounts. The amount of the monthly
                        payments shall be calculated to pay out over the
                        specified period the entire balance in the Participant's
                        Account as of his Retirement Date with interest credited
                        monthly on the declining balance at the Plan Interest
                        Rate. The Participant's Account shall continue to be
                        credited monthly with interest at the Plan Interest Rate
                        and charged with the monthly payments to the
                        Participant. The amount of the monthly payments to the
                        Participant shall be adjusted on January 1 of each year
                        to reflect changes in the Plan Interest Rate and other
                        changes in the Participant's Account balance.

                             Section 8.2. Change in Payment Option. The payment
                        option selected by the Participant may be changed at any
                        time by the Participant submitting a new payment
                        selection to the Committee, by a change shall be
                        effective only if it is received by the Committee at
                        least 12 months before payments under the Plan commence.

                             Section 8.3 Payments Subject to Golden Parachute
                        Provisions. Notwithstanding the above, if payment at the
                        time specified in the first sentence of this paragraph
                        would subject the Participant to the excise tax under
                        Section 4999 of the Code, payment of the vested portion
                        of a Participant's accounts shall be deferred until the
                        earlier of (a) the date that would have been the
                        Participant's Normal Retirement Date, Early Retirement
                        Date or Disability Retirement Date, (b) death of the
                        Participant, or (c) total and permanent disability or
                        legally established mental incompetency of the
                        Participant.

                             Section 8.4 Vested Portion of Participants'
                        Accounts. The vested portion of a Participant's accounts
                        shall mean: (i) the total value of the accounts of a
                        Participant who is entitled to a distribution pursuant
                        to Section 9.1 of the Qualified Plan; or (ii) with
                        respect to a Participant who is entitled to a
                        distribution pursuant to Section 9.2 of the Qualified
                        Plan, the total value of the accounts maintained under
                        Sections 6.2(a) and (c) hereof. Notwithstanding the
                        foregoing, the total value of the accounts of a
                        Participant shall become nonforfeitable as of the date
                        on which the Participant attains age 65.

<PAGE>   21

                             Section 8.5 Recrediting of Forfeited Amounts. If a
                        Participant entitled to a distribution pursuant to
                        Section 9.2 of the Qualified Plan receives the vested
                        portion of the amount credited to his or her accounts in
                        the Plan, forfeits the remainder, and is thereafter
                        reemployed prior to incurring five consecutive Break in
                        Service Years, then as of the end of the month
                        coincident with or next following the Participant's date
                        of reemployment, the amount of the Participant's
                        accounts that was forfeited upon the earlier termination
                        of employment shall be credited to the Participant's
                        accounts. Interest shall not accrue on such amount
                        between the time it was forfeited and the time at which
                        it was recredited.

                             Section 8.6 Transfer to an Affiliated Company.
                        Benefits for a Participant who transfers employment from
                        one Employer to an Affiliated Company shall be subject
                        to Section 9.7(c) of the Qualified Plan. Such a transfer
                        of employment shall cause a transfer of the accounts
                        maintained by an Employer for a Participant if the new
                        Employer has adopted the Plan and the former Employer
                        transfers cash to the new Employer equal to the amount
                        of the accounts transferred. In all other events, a
                        transfer of employment shall not cause a transfer of the
                        accounts maintained by an Employer for a Participant.

                  Article 10 is amended as follows:

                        The Plan shall be administered by the Committee
                        appointed pursuant to the provisions of Section 10.1 of
                        the Qualified Plan. The Committee shall have the same
                        powers and duties, and shall be subject to the same
                        limitations, as are described in the Qualified Plan.
                        However, unlike the limitation on the Committee's power
                        to amend or modify the Qualified Plan under Section 11.1
                        of the Qualified Plan, the Committee shall have full
                        power to amend or modify the Plan in all respects.

                  Articles 12 and 13 are amended to update the references to the
                  sections in the Qualified Plan and to delete "Corporation"
                  after "MCN" in all cases after the term MCN has been defined.

11/29/99          Plan amended and restated as of 1/1/98 as follows:

                  Section 5.3 is deleted in its entirety. Prior to deletion,
                  previous Section 5.3 read as follows:

                             Section 5.3 Restriction on Change of Deferrals
                        Under the Plan. The amount to be deferred by an
                        Executive for a Plan year shall be determined using the
                        percentage of his or her Compensation Rate in effect as
                        of the December 31 of the year which immediately
                        precedes the year for which it applies. An Executive who
                        elects to participate in the Plan may not, after the
                        effective date of such election, change the percentage
                        of his or her Compensation Rate deferred under the

<PAGE>   22

                        Qualified Plan to affect the amount to be deferred under
                        the Plan, except for a change submitted prior to the
                        first day of the calendar year for which the change is
                        desired, and, when the Qualified Plan is amended to
                        permit increased Voluntary Reductions or Salary
                        Reductions and such change is submitted prior to the
                        effective date of such amendments. Any such other change
                        in the percentage of his or her Compensation Rate
                        deferred under the Qualified Plan shall be ignored for
                        deferral purposes under the Plan.

                  Section 6.2(a) is amended to delete reference to all of the
                  limitations listed in Section 5.1 and merely references
                  Section 5.1.

                  Section 6.2(c) is deleted in its entirety. Prior to deletion,
                  previous Section 6.2(c) read as follows:

                        An amount equal to the distribution of dividends on the
                        MCN Stock held in a Participant's Plan Account under the
                        Qualified Plan to the extent the Executive has not
                        elected or was ineligible to make Additional Allotments
                        and the Executive has elected to contribute such amount
                        to the Plan.

                  The last sentence of the first paragraph of the flush language
                  in Section 6.2 is deleted. Prior to deletion the sentence read
                  as follows:

                             The credits under (c) of this Section shall be
                        allocated to the MCN Stock account in this Plan.

                  The second to last sentence of the second paragraph of Article
                  7 is deleted. Prior to deletion, the sentence read as follows:

                             If a Participant receives a hardship withdrawal
                        from this Plan or from the Qualified Plan, no amounts
                        may be credited to the Participant's accounts under
                        Section 6.2(a) or (b) for a period of twelve months
                        after receipt of the hardship withdrawal.

                  Section 8.1 was amended to read as currently shown. Prior to
                  amendment, Section 8.1 read as follows:

                             Section 8.1 Form and Timing of Payment. On the date
                        that a Participant becomes entitled, pursuant to either
                        Section 9.1 or 9.2 of the Qualified Plan (the
                        "Retirement Date"), to a distribution of his or her
                        account in the Qualified Plan, such Participant shall be
                        entitled to receive the vested portion of the amount
                        credited to his or her accounts in the Plan commencing
                        on the first of the month following the month in which
                        his Retirement Date occurs. As of the first of the month
                        following the month in which his

<PAGE>   23

                        Retirement Date occurs, the Participant's Account shall
                        be valued on a cash basis with interest credited monthly
                        at a rate equal to the interest rate of ten-year U.S.
                        Treasury Notes, or such other rate as set by the
                        Committee (the "Plan Interest Rate"). Payment of the
                        vested portion of a Participant's accounts shall be made
                        in accordance with the Participant's selection on his
                        Benefit Agreement either in monthly payments in one-year
                        increments not to exceed 15 years, or in one lump sum by
                        the Employer maintaining the accounts. The amount of the
                        monthly payments shall be calculated to pay out over the
                        specified period the entire balance in the Participant's
                        Account as of his Retirement Date with interest credited
                        monthly on the declining balance at the Plan Interest
                        Rate. The Participant's Account shall continue to be
                        credited monthly with interest at the Plan Interest Rate
                        and charged with the monthly payments to the
                        Participant. The amount of the monthly payments to the
                        Participant shall be adjusted on January 1 of each year
                        to reflect changes in the Plan Interest Rate and other
                        changes in the Participant's Account balance.

                  Section 8.4 is amended to delete "and (c) hereof" at the end
                  of the first sentence.

                  The election and beneficiary designation forms are revised to
                  read as follows:

<PAGE>   24

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN

                             DEFERRAL ELECTION FORM

<TABLE>
<S><C>
================================================================================================================
Employee Name (Print)                          Social Security No.                          I. D. Number

----------------------------------------------------------------------------------------------------------------
Address (Number/Street)                        City                           State         Zip Code

================================================================================================================

Deferral Election

[ ]      In accordance with the terms of the MCN Energy Group Supplemental
         Savings Plan ("Plan") which is hereby incorporated by reference, I
         hereby accept and agree to all the provisions of the Plan and
         irrevocably elect pursuant to Section 5.2 of the Plan to defer a
         portion of my compensation pursuant to Section 6.2 of the Plan.

[ ]      I elect NOT to participate in the MCN Energy Group Supplemental Savings
         Plan.

Payment Election

I elect to have the amount I have deferred paid to me after termination of my
employment with the Company and its subsidiaries by reason of retirement,
disability, or death, in the manner specified below:

[ ]      Lump-sum payment.

[ ]      Payment in annual installments over       years (in one year
         increments, not to exceed 15 years).

I understand that if I fail to make a payment election, my MCN Energy Group
Supplemental Savings Plan account balance will be paid in a lump sum at the end
of the quarter in which my Retirement Date (as defined in Section 8.1) occurs.

I understand that, in addition to the above payment, I may be eligible for a
hardship withdrawal pursuant to Article 7 of the Plan.

================================================================================================================
Employee Signature                                                                     Date

----------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                           Title                                Date

================================================================================================================
</TABLE>

Revised March 18, 2000

<PAGE>   25

                                MCN ENERGY GROUP
                            SUPPLEMENTAL SAVINGS PLAN

                          BENEFICIARY DESIGNATION FORM
<TABLE>
<S><C>
============================================================================================================================
Employee Name (Print)                                    Social Security No.                            I. D. Number

============================================================================================================================
Address (Number/Street)                                  City                            State          Zip Code

============================================================================================================================

I hereby designate, pursuant to Article 9 of the above-referenced plan, the
below-designated person(s) as my beneficiary in the event of my death:

===========================================================================================================================
Beneficiary's Name                                             Address

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

I UNDERSTAND THAT THE DESIGNATION OF A BENEFICIARY OTHER THAN MY SPOUSE MUST BE
CONSENTED TO IN WRITING BY MY spouse.

In the event any of the above-named beneficiaries should predecease me, or shall
survive me but die before receiving all amounts to be paid, I hereby name the
following as a contingent beneficiary to receive any such unpaid amounts:

===========================================================================================================================
Beneficiary's Name                                             Address

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

In the event none of the above-named beneficiaries survive me, any unpaid
amounts shall be paid to my lawful successor in interest. I reserve the right to
change this beneficiary designation at any time by filing with the Committee or
its Designee a new beneficiary designation form.

I UNDERSTAND THAT MY MOST RECENT ELECTION AS TO THE BENEFICIARY DESIGNATION WILL
APPLY TO ALL DEFERRALS BY ME UNDER THE PLAN.

=========================================================================================================================
Employee Signature                                                                     Date

-------------------------------------------------------------------------------------------------------------------------
Receipt Acknowledged By                           Title                                Date

=========================================================================================================================

SPOUSAL CONSENT:  I HEREBY CONSENT TO THE DESIGNATION OF BENEFICIARY SET FORTH
HEREIN.

=========================================================================================================================
Spouse's Signature                                                    Date

-------------------------------------------------------------------------------------------------------------------------
Witness                                                               Date

=========================================================================================================================
</TABLE>

<PAGE>   26

12/15/99          The Plan was amended and restated as of December 15, 1999 to
                  reflect the following changes:

                  New Section 12.5 was added to read as shown.

                  Sections 13.3, 13.4 and 13.5 were redesignated as Sections
                  13.4, 13.5 and 13.6, respectively. A new Section 13.3, Lump
                  Sum Payments, was added to read as shown.<PAGE>   1
                                                                   EXHIBIT 10.11

                                MCN ENERGY GROUP
                            LONG-TERM INCENTIVE PLAN

                   (AS AMENDED AND RESTATED DECEMBER 15, 1999)

<PAGE>   2

                                MCN ENERGY GROUP

                            LONG-TERM INCENTIVE PLAN

                                Table of Contents

<TABLE>
<CAPTION>
                                                                                   Page
                                                                                   ----
<S>                                                                               <C>
Article 1 - Title, Purpose and Effective Date...................................... 1

     1.1      Title ............................................................... 1

     1.2      Purpose ............................................................. 1

     1.3      Effective Date ...................................................... 1

Article 2 - Definitions............................................................ 1

     2.1      Affiliated Company................................................... 1

     2.2      Award................................................................ 1

     2.3      Board of Directors................................................... 1

     2.4      Cause ............................................................... 2

     2.5      Code ................................................................ 2

     2.6      Committee............................................................ 2

     2.7      Common Stock......................................................... 2

     2.8      Corporation ......................................................... 2

     2.9      Deferred Account..................................................... 2

     2.10     Disability .......................................................... 2

     2.11     Incentive Stock Option............................................... 2

     2.12     Key Employee......................................................... 2

     2.13     Nonemployee Director................................................. 2

     2.14     Nonqualified Stock Option............................................ 2

     2.15     Participant ......................................................... 2

     2.16     Participating Corporation............................................ 2

</TABLE>

                                       i

<PAGE>   3

<TABLE>
<CAPTION>

                                                                                   Page
                                                                                   ----
<S>                                                                               <C>
     2.17     Peer Group........................................................... 2

     2.18     Performance Share.................................................... 2

     2.19     Plan Interest Rate................................................... 3

     2.20     Stock Option ........................................................ 3

     2.21     TSR or Total Shareholder Return...................................... 3

Article 3 - Administration......................................................... 3

     3.1      Committee and Board to Administer.................................... 3

     3.2      Authority of the Committee and Board................................. 3

     3.3      Decisions Binding.................................................... 3

Article 4 - Eligibility for Awards................................................. 4

Article 5 - Performance Cycle and Performance Comparison........................... 4

     5.1      Performance Cycle.................................................... 4

     5.2      Performance Comparison............................................... 4

Article 6 - Grant of Awards........................................................ 4

     6.1      Grant of Performance Shares and Stock Options........................ 4

     6.2      Initial Individual Award............................................. 4

     6.3      Initial Grant........................................................ 5

     6.4      Adjustment to Initial Grant.......................................... 5

Article 7 - Dividend Equivalents................................................... 6

Article 8 - Vesting of Performance Shares.......................................... 6

     8.1      Performance Shares   ................................................ 6

     8.2      Stock Options ....................................................... 7

     8.3      Common Stock Holding Requirement..................................... 7

</TABLE>

                                       ii

<PAGE>   4

<TABLE>
<CAPTION>
                                                                                   Page
                                                                                   ----
<S>                                                                               <C>
Article 9 -   Performance Shares Valuation and
              Payment of Final Awards.............................................. 7

     9.1      Performance Shares - Amount of Final Award........................... 7

     9.2      Performance Shares = Payment of Final Award.......................... 8

Article 10 -  Deferral of Performance Shares....................................... 8

     10.1     Election to Defer.................................................... 8

     10.2     Deferral Election Agreement.......................................... 8

     10.3     Establishment of Deferred Account.................................... 8

     10.4     Dividend Equivalents................................................. 9

     10.5     Timing of Retirement Distributions................................... 9

     10.6     Form of Distributions................................................ 10

     10.7     Termination Benefit.................................................. 10

     10.8     Change in Payment Option............................................. 10

     10.9     Hardship Withdrawal Benefits......................................... 10

     10.10    Interaction with the MCN Energy Group Mandatory Deferred
              Compensation Plan.................................................... 11

Article 11 -  Funding of Benefits.................................................. 11

     11.1     Unfunded Plan........................................................ 11

     11.2     Non-ERISA Plan....................................................... 11

Article 12 -  Tax Withholdings..................................................... 12

     12.1     Tax Withholding...................................................... 12

Article 13 -  Selection of and Payments to a Beneficiary........................... 12

     13.1     Beneficiary Designation.............................................. 12

     13.2     Change in Beneficiary Designation.................................... 12

</TABLE>

                                      iii

<PAGE>   5

<TABLE>
<CAPTION>
                                                                                   Page
                                                                                   ----
<S>                                                                               <C>
     13.3     Pre-Retirement Survivor Benefit  .................................... 12

     13.4     Post-Retirement Survivor Benefit..................................... 13

Article 14 - Amendment and Termination............................................. 13

     14.1     Amendment, Modification, and Termination............................. 13

     14.2     Awards Previously Granted............................................ 13

     14.3     Right to Suspend .................................................... 13

     14.4     Right to Accelerate.................................................. 13

Article 15 - Miscellaneous......................................................... 14

     15.1     No Right of Continued Employment..................................... 14

     15.2     Delivery of Shares................................................... 14

     15.3     Transfer and Leave of Absence........................................ 14

     15.4     Michigan Law to Govern............................................... 14

     15.5     Forfeitures.......................................................... 14

     15.6     Gender, Number and Heading .......................................... 15

Article 16 - Change in Control..................................................... 15

     16.1     Change in Control.................................................... 15

     16.2     Transfer to Rabbi Trust.............................................. 16

     16.3     Joint and Several Liability.......................................... 16

</TABLE>

Attachments

Historical Background

                                       iv

<PAGE>   6

                                MCN ENERGY GROUP
                            LONG-TERM INCENTIVE PLAN

                   (AS AMENDED AND RESTATED DECEMBER 15, 1999)

                                    ARTICLE 1
                        TITLE, PURPOSE AND EFFECTIVE DATE

         1.1 TITLE. The title of the Plan, formerly the "MCN Energy Group
Long-Term Incentive Performance Share Plan," shall be the "MCN Energy Group
Long-Term Incentive Plan" and is referred to in this document as the "Plan."
This Plan is governed by the broader provisions set forth in the MCN Corporation
Stock Incentive Plan approved by shareholders on May 10, 1989. The MCN
Corporation Stock Incentive Plan shall govern any conflicting provisions between
such plan and this Plan.

         1.2 PURPOSE. The purpose of the Plan is to promote the success of MCN
Energy Group Inc. (the "Corporation" or "MCN") by providing financial incentives
to Key Employees of the Corporation and its affiliated companies, thereby
promoting the long-term growth and financial success of the Corporation by (i)
attracting and retaining outstanding ability, (ii) strengthening the
Corporation's capability to develop, maintain, and direct a competent management
team, (iii) providing an effective means for Key Employees to acquire and
maintain ownership of MCN stock, (iv) motivating Key Employees to achieve
long-range performance goals and objectives, and (v) providing incentive
compensation opportunities competitive with those of other major corporations.

         1.3 EFFECTIVE DATE. The Plan is effective December 15, 1999.

                                    ARTICLE 2
                                   DEFINITIONS

         The following terms have the meaning described below when used in the
Plan:

         2.1        "Affiliated Company" means any corporation while such
corporation is a member of the same controlled group of corporations (within the
meaning of Section 414(b) of the Code) as the Corporation or any other employing
entity while such entity is under common control (within the meaning of Section
414(c) of the Code) of the Corporation.

         2.2 "Award" shall mean a grant of Performance Shares and Stock Options
under this Plan.

         2.3 "Board Of Directors" or "Board" shall mean the Board of Directors
of the Corporation.

<PAGE>   7

         2.4 "Cause" shall mean repeated material breaches of a Key Employee's
duties of employment which are not cured after receipt by the Key Employee of
written notice specifying such breaches or the Key Employee's conviction of a
felony involving moral turpitude.

         2.5 "Code" shall mean the Internal Revenue Code of 1986, as amended.

         2.6 "Committee" shall mean not less than three Nonemployee Directors of
the Board, who, at the time of service on the Compensation Committee hereunder,
are, and at all times during the twelve month period prior to his or her
becoming a member shall have been, not eligible to receive an Award granted by
such Committee under the Plan.

         2.7 "Common Stock" shall mean common stock, par value $.01 of the
Corporation.

         2.8 "Corporation" shall mean MCN Energy Group Inc. or any successor to
it in ownership of all or substantially all of its assets.

         2.9 "Deferred Account" shall mean an account established for a
Participant under Section 10.3.

         2.10 "Disability" shall have the meaning set forth in Section 22(e)(3)
of the Code.

         2.11 "Incentive Stock Option" shall mean an option intended to qualify
for the tax treatment applicable to incentive stock options under section 422 of
the Code.

         2.12 "Key Employee" shall mean an employee of the Corporation who
occupies a responsible executive, professional, or administrative position and
who has the capacity to contribute to the success of the Corporation, as
determined by the Committee or Board.

         2.13 "Nonemployee Director" shall have the meaning ascribed to such
term in Rule 16b-3 of the Securities Exchange Act of 1934.

         2.14 "Nonqualified Stock Option" shall mean an option that is not
intended to be an Incentive Stock Option.

         2.15 "Participant" shall mean a Key Employee who has been granted an
Award.

         2.16 "Participating Corporation" shall mean the Corporation, Affiliated
Company, or other affiliated entity (whether or not incorporated) designated by
the Board of Directors.

         2.17 "Peer Group" shall mean a peer group of 16 comparison companies as
reflected in Attachment I. The list may be revised as and when the Board deems
appropriate.

         2.18 "Performance Share" shall mean an award granted under Article 6.

                                       2

<PAGE>   8

         2.19 "Plan Interest Rate" shall mean the average interest rate of
10-year U.S. Treasury Notes for the November of the prior calendar year, or such
other rate as set by the Committee or Board.

         2.20 "Stock Option" shall mean a right granted under Article 6 hereof,
to purchase shares of Common Stock at a specified price during specified time
periods. Stock options shall be Nonqualified Stock Options.

         2.21 "Tsr" Or "Total Shareholder Return" shall mean the percentage
increase in value at the end of a three year period of $100 invested in Common
Stock at the beginning of the period with all dividends being reinvested at the
price of Common Stock at the end of the month in which the dividend is paid. To
determine the value at the beginning and end of any period, a calculation is
made of the average Common Stock price for the trading days from December 17
through January 15.

                                    ARTICLE 3
                                 ADMINISTRATION

         3.1 COMMITTEE AND BOARD TO ADMINISTER. The Committee and Board shall
administer the Plan. A majority of the members of the Committee or Board shall
constitute a quorum for the conduct of business at any meeting. They shall act
by majority vote of the members present at a duly convened meeting, which may
include a meeting by conference telephone call held in accordance with
applicable law. Action may be taken without a meeting if written consent thereto
is given in accordance with applicable law. The Committee or Board may delegate
its authority to administer the Plan.

         3.2 AUTHORITY OF THE COMMITTEE AND BOARD. Except as limited by law or
by the Certificate of Incorporation or Bylaws of the Corporation, and subject to
the provisions herein, the Committee or Board shall have full power to select
employees who shall participate in the Plan; determine the sizes and types of
Awards; determine the terms and conditions of Awards in a manner consistent with
the Plan; construe and interpret the Plan and any agreement or instrument
entered into under the Plan as they apply to employees; establish, amend, or
waive rules and regulations for the Plan's administration as they apply to
employees; and (subject to the provisions of Article 14 herein) amend the terms
and conditions of any outstanding Award to the extent such terms and conditions
are within the discretion of the Committee or Board as provided in the Plan.
Further, they shall make all other determinations, which may be necessary or
advisable for the administration of the Plan, as the Plan applies to employees.
The Committee or Board may delegate its authority as identified herein.

         3.3 DECISIONS BINDING. All determinations and decisions made by the
Committee or Board pursuant to the provisions of the Plan and all related orders
and resolutions of the Board shall be final, conclusive, and binding on all
persons, including the Corporation, its stockholders, Directors, employees,
Participants and their estates and beneficiaries.

                                       3

<PAGE>   9

                                    ARTICLE 4
                             ELIGIBILITY FOR AWARDS

         An Award may be made to a Key Employee selected by the Committee or
Board. In making this selection, and in determining the amount of the Award,
consideration may be given to the functions and responsibilities of the Key
Employee, his present and potential contributions to the success of the
Corporation, the value of his services to the Corporation, and such other
factors deemed relevant.

                                    ARTICLE 5
                  PERFORMANCE CYCLE AND PERFORMANCE COMPARISON

         5.1 PERFORMANCE CYCLE. The performance cycle is six years. Each
performance cycle is divided into two parts of three years each. Performance
cycles overlap.

         5.2 PERFORMANCE COMPARISON. The performance results for the Peer Group
and MCN shall be arranged on the basis of TSR from highest to lowest. The Peer
Group shall be divided into equal fourths or quartiles, with I being the highest
quartile and IV the lowest.

                                    ARTICLE 6
                                 GRANT OF AWARDS

         6.1 GRANT OF PERFORMANCE SHARES AND STOCK OPTIONS. Subject to the
limitations of the MCN Energy Group Inc. Stock Incentive Plan, the Committee or
Board shall, after such consultation with and consideration of the
recommendations of management as the Committee or Board considers desirable,
select those Key Employees to whom Performance Shares and Stock Options will be
granted. Subject to the provisions of the Plan, Performance Shares and Stock
Options shall be subject to such terms, restrictions, conditions, vesting
requirements, and payment rules (all of which are sometimes hereinafter
collectively referred to as "rules") as the Committee or Board may determine in
its sole discretion. All such rules applicable to a particular Award shall be
reflected in writing and furnished to the Key Employee at the time of grant. The
rules need not be identical for each award of Performance Shares or Stock
Options.

         6.2 INITIAL INDIVIDUAL AWARD. Initial individual Awards will be
established for each Key Employee during the first quarter of the fourth year of
the performance cycle, in accordance with Table I of Attachment II. The major
factors considered in determining the level of an individual award include: (a)
prior contribution and accomplishments; (b) projected contribution and impact on
driving business performance and shareholder value over the next three years;
(c) career potential; and (d) retention.

                  (a) VALUE OF PERFORMANCE SHARES. The value of Performance
Shares shall be based in whole or in part, on the fair market value of Common
Stock.

                                       4

<PAGE>   10

                  (b) VALUE OF STOCK OPTIONS. Pursuant to the Code, Stock
Options have no readily ascertainable fair market value on the date of grant.
Stock Options may be used to purchase Common Stock at a purchase price (or
option price) equal to 100 percent of the fair market value of such Common Stock
on the date the Stock Option is granted.

                  (c)FAIR MARKET VALUE OF COMMON STOCK. For purposes of
Sections 6.1(a) and (b), the fair market value of Common Stock shall be based on
the average Common Stock price for the trading days from December 17 through
January 15 immediately preceding the grant of the Awards.

         6.3 INITIAL GRANT. Subject to the Committee's or the Board's
discretion, the initial grant shall be made in the first quarter of the fourth
year of the performance cycle, based on TSR in the first three years of the
performance cycle as compared to TSR of the Peer Group. Initial grants are
determined by adjusting the initial individual Award either upward or downward
based on MCN's TSR performance compared to the Peer Group, as reflected in Table
II on Attachment II. Other performance criteria may be used at the sole
discretion of the Board or Committee.

         6.4 ADJUSTMENT TO INITIAL GRANT. An adjustment of initial grants may be
made at the sole discretion of (i) the Board or Committee for a Participant in
Tiers I and II; and (ii) the Chairman of MCN for any other Participant. In
general, however, an initial grant shall be adjusted as described below for the
circumstances listed in 6.4(a) through (e).

                  (d) NORMAL RETIREMENT OR DISABILITY. In the event of the
retirement of a Participant at age 62 or older, or retirement due to Disability,
the initial grant will be unchanged. Final awards of Performance Shares, if any,
will be given at the end of the performance cycle and adjusted pursuant to
Article 9.

          In the event of the retirement of a Participant at age 62 or older, or
retirement due to Disability, all unvested Stock Options shall become
immediately vested. A Participant shall have one year from the date of the
Participant's retirement to exercise the Stock Options in which the Participant
had a vested interest.

                  (b) EARLY RETIREMENT. In the event of the retirement of a
Participant prior to age 62, the initial grant shall be prorated according to
the number of whole months in the last half of the performance cycle that the
Participant was an active employee. Any proration of the initial grant shall be
effective as of the date of early retirement. A proration of the initial grant
of Performance Shares may result in the forfeiture of some, all, or none of such
Performance Shares. Final awards of Performance Shares, if any, will be given at
the end of the performance cycle and adjusted pursuant to Article 9.

          In the event of the retirement of a Participant prior to age 62, all
unvested Stock Options shall be immediately forfeited.

                                       5

<PAGE>   11

                  (c) DEATH. In the event of the death of the Participant, the
initial grant for each performance cycle shall be unchanged. The final Award of
Performance Shares for each performance cycle shall be valued and paid in
accordance with Article 9.

           In the event of the death of the Participant, all unvested Stock
Options shall be immediately forfeited. A Participant's estate shall have one
year from the date of the Participant's death to exercise the Stock Options in
which the Participant had a vested interest.

                  (d) OTHER TERMINATIONS - PERFORMANCE SHARES. In the event of
termination for any reason not described in Sections 6.4(a), (b) or (c), a
Participant's initial grant of Performance Shares may be adjusted by all, none,
or any portion of the initial grant of Performance Shares that have been given
to the Participant. The reduction in initial grants is effective as of the date
of termination. Final awards, if any, will be given at the end of the
performance cycle and adjusted pursuant to Article 9.

                  (e) OTHER TERMINATIONS - STOCK OPTIONS. In the event of
termination for any reason not described in Sections 6.4(a), (b) or (c), the
entire amount of a Participant's initial grant of Stock Options that are not
vested at the time of termination shall be forfeited. A Participant shall have
30 days from the date of such termination to exercise the Stock Options in which
he has a vested interest.

                                    ARTICLE 7
                              DIVIDEND EQUIVALENTS

         During the second part of the performance cycle (years four through
six) Participants will receive dividend equivalent amounts based on the number
of Performance Shares in the initial grant, as adjusted pursuant to Section 6.4.
Dividend equivalents for dividends with a record date that is subsequent to a
Participant's retirement or termination date, will be paid to the Participant
based on the reduced number of Performance Shares, as determined under Section
6.4.

                                    ARTICLE 8
                                VESTING OF AWARDS

         8.1      PERFORMANCE SHARES.

                  (a) GENERAL. Subject to the Committee's or the Board's
discretion and the rules of Sections 6.4 and 16.1, Performance Shares shall
fully vest and be one hundred percent (100%) nonforfeitable on the date the
Board approves the final Award (the "Vesting Date").

                  (b) DEATH - PRIOR TO VESTING DATE. Subject to the Committee's
or the Board's discretion and the rules of Sections 6.4 and 16.1, upon
termination of employment prior

                                       6

<PAGE>   12

to the Vesting Date by reason of the Participant's death, all Performance Shares
granted to such Participant shall become fully vested and nonforfeitable as of
the date of death.

         8.2 STOCK OPTIONS. Subject to the rules of Sections 6.4 and 16.1, Stock
Options shall become vested on a pro-rata basis over a three-year period
beginning with the date of grant. Vested Stock Options may be exercised by the
Participant during the period that begins on the date the Stock Options vest and
ends on the date that is 10 years after the date of the grant of the Stock
Options. A Stock Option shall be exercised by delivering notice to the Company's
principal office, to the attention of its Secretary, no less than one business
day in advance of the effective date of the proposed exercise. The exercise
price shall equal the average of the high and low Common Stock price on the New
York Stock Exchange Composite Tape for the day of the February Board meeting.

         Payment for shares of Common Stock purchased upon the exercise of a
Stock Option shall be made on the effective date of such exercise with the
Company facilitating a cashless exercise on behalf of the employee. At no time
will the Company directly sell shares of Common Stock under this Plan.

         8.3 COMMON STOCK HOLDING REQUIREMENT. Participants receiving Common
Stock as a final award under the Plan are required to hold such Common Stock
until they separate employment from the Company, to the extent the Participant
does not meet the Common Stock Ownership Guidelines described in Attachment III.

         Participants must consult with MCN's Legal Department prior to
executing any sale of Common Stock. Compliance with the Common Stock Ownership
Guidelines will be determined at that time. A Participant's failure to comply
with this section 8.3 shall result in disciplinary action up to and including
termination of employment.

                                    ARTICLE 9
                      VALUATION AND PAYMENT OF FINAL AWARDS

         9.1 PERFORMANCE SHARES - AMOUNT OF FINAL AWARD.

                  (a) GENERAL. Final Awards will be determined by adjusting the
initial grant of Performance Shares either upward or downward based on the
Corporation's performance in years four through six of the performance cycle as
compared to the TSR of the Peer Group. Calculation of TSR performance for the
final Award of Performance Shares will follow that described in Section 5.2.
Other performance criteria may be used at the sole discretion of the Board or
Committee. The Board will authorize the size of the final Award of Performance
Shares based on Table III in Attachment II. The value of the final Award of
Performance Shares shall be determined using the simple average of the sales
price of the shares of Common Stock, sold under the provisions of this Plan,
over a one to five trading-day period beginning with the trading day after the
day the MCN Board of Directors approves the final Award.

                                       7

<PAGE>   13

                  (b) DEATH. Final Awards will be determined by adjusting the
initial grant of Performance Shares either upward or downward based on the
midpoint percentage of the Corporation's TSR quartile compared to the TSR of the
Peer Group for the quarter immediately preceding the Participant's date of
death. The value of the final Award of Performance Shares shall be determined
using the simple average of the reported high and low prices of Common Stock on
the New York Stock Exchange composite tape on the date of death. If the date of
death is not a trading day, the value of the final Award of Performance Shares
shall be determined using the simple average of the reported high and low prices
of Common Stock on the New York Stock Exchange composite tape on the first
trading day prior to the date of death.

         9.2 PERFORMANCE SHARES - PAYMENT OF FINAL AWARD.

                  (a) GENERAL. Final Awards of Performance Shares, in the form
of Common Stock, will be made in the first quarter following the end of the
six-year performance cycle.

                  (b) DEATH. Final Awards of Performance Shares, in the form of
Common Stock, shall be paid to the Beneficiary no later than 120 days after the
Participant's date of death.

                                   ARTICLE 10
                         DEFERRAL OF PERFORMANCE SHARES

         10.1 ELECTION TO DEFER. A Participant in Tiers I through V may elect,
  no later than October 31 of the calendar year preceding the calendar year in
  which an Award would otherwise be payable to the Participant, to defer his
  Award of Performance Shares in an amount (i) not less than 50 percent, nor
  (ii) in excess of 100 percent of the Award of Performance Shares less the
  Federal Insurance Contributions Act tax on such Award, in 10 percent
  increments. The Award of Performance Shares shall be deferred until
  termination of employment with the Corporation (the "Deferral Period"). The
  Deferral Period may not extend past the date the Participant terminates
  employment with the Corporation for any reason.

         10.2 DEFERRAL ELECTION AGREEMENT. The Committee or Board shall provide
to each Key Employee a form of Deferral Election Agreement (See Attachment IV),
which shall set forth the Key Employee's acceptance of the terms provided
hereunder, his agreement to be bound by the terms of the Plan, and such other
matters as are set forth in this Plan or deemed advisable by the Committee or
Board. The most recent Deferral Election Agreement shall be effective for all
payments made to a Participant under the Plan with regards to the Deferral
Period, payment of dividend equivalents and distribution elections.

         10.3 ESTABLISHMENT OF DEFERRED ACCOUNT. The Committee or Board shall
establish a Deferred Account for each Participant in regards to the Awards the
Participant has elected to defer, as set forth on his Deferral Election
Agreement.

                                       8

<PAGE>   14

                  (A) DENOMINATION OF DEFERRALS - GENERAL. During the Deferral
Period, a Participant's Deferred Account shall be denominated in common stock
equivalents equal to the number of shares of Common Stock the Participant would
have otherwise received ("Share Equivalents"), had he not made an election to
defer under Section 10.1.A Participant's Deferred Account shall earn dividend
equivalents during the Deferral Period in accordance with Section 10.4.

                  (B) DENOMINATION OF DEFERRALS -AFTER COMPLETION OF DEFERRAL
PERIOD OR AGE 65. On the earlier of the date (i) the Deferral Period ends or
(ii) the Participant turns age 65 ("Valuation Date"), the Participant's account
shall be valued on a cash basis, using the average of the high and low Common
Stock price on the New York Stock Exchange Composite Tape on the Valuation Date.
Such cash valuation shall be used for purposes of determining the amount of
interest to be credited to the Participant's account during the period annual
distributions are made to the Participant ("Payout Period") and for purposes of
determining the number of shares of Common Stock that will be distributed to a
Participant during the Payout Period, in accordance with Section 10.6. Interest
shall be credited annually on the Anniversary Date on the declining cash balance
at the Plan Interest Rate. The Human Resources Department shall notify each
Participant of his account balance within a reasonable time after the end of the
Participant's Deferral Period.

         10.4 DIVIDEND EQUIVALENTS. Dividend equivalents equal to 50% of the
dividends payable on MCN Common Stock shall be credited to a Participant's
Account during the Deferral Period based on the Share Equivalents held in such
Participant's Account. Dividend equivalents shall be reinvested in Share
Equivalents based upon the average of the high and low Common Stock price on the
dividend payment date. Alternatively, a Participant may elect on his Deferral
Election Agreement to have all of such credited dividend equivalents paid
directly to him in cash during the Plan Year. A Participant's election regarding
dividend equivalents shall be effective for all Share Equivalents held in the
Participant's Account on the January 1 immediately following execution of his
Deferral Election Form and shall remain in effect until revoked by the
Participant. Revocation of a dividend equivalent election shall be effective on
the January 1 immediately following revocation.

         10.5 TIMING OF RETIREMENT DISTRIBUTIONS. Upon completion of a
Participant's Deferral Period, the distribution of the Participant's Deferred
Account shall be made in accordance with the Participant's selection on his
Deferral Form; either (i) in annual payments over a period not less than one
year and not more than 15 years, in one year increments, or (ii) as a lump sum
distribution. If no Deferral Form is on file or no distribution option is
indicated on the Deferral Form, the Participant's Deferred Account shall be
distributed in one lump sum. All distributions shall be paid out at the end of
the quarter in which the Participant's retirement date occurs. If a Participant
has elected annual payments, the initial payment shall be made at the end of the
quarter in which the Participant's Deferral Period ends. All subsequent annual
payments shall be made at the end of the quarter in which the anniversary of the
Participant's Deferral Period ("Anniversary Date") occurs. Interest shall accrue
on the value of the Participant's account from the Valuation date to the end of
the quarter in which the initial payment is distributed.

                                       9

<PAGE>   15

         10.6 FORM OF DISTRIBUTIONS. Notwithstanding the fact that a
Participant's Deferred Account shall be valued on a cash basis as of the
Valuation Date, the distribution to a Participant shall be paid in MCN common
stock. The number of shares of Common Stock to be distributed shall equal the
number of shares (rounded up to the next whole number of shares) such
cash-valued Deferred Account, divided by the number of payments remaining in the
Payout Period, could have purchased based on the average of the high and low
Common Stock price on the New York Stock Exchange Composite Tape on the fifth
trading-day prior to the end of the quarter in which Valuation Date (or
Anniversary Date for all subsequent payments) occurs. The number of shares
distributed annually shall be determined by amortizing the cash value of the
Participant's Deferred Account over the Payout Period. Interest shall be
credited annually on the declining balance at the Plan Interest Rate. The number
of shares distributed annually to the Participant shall be recalculated on the
Participant's Anniversary Date to reflect changes in the Plan Interest Rate, the
decrease in the number of annual payments left to be made, and other changes to
the Participant's Deferred Account balance. The amortization schedule shall be
updated annually to reflect the average 10-year Treasury Note interest rate for
the fifth trading-day prior to the end of the quarter in which Valuation Date
(or Anniversary Date for all subsequent payments) in which the distribution is
to be made.

         10.7 TERMINATION BENEFIT. A Participant who terminates employment prior
to completion of his Deferral Period shall receive payment of his Account
balance in accordance with the Participant's election on his Deferral Election
Agreement; either in annual payments over three years or as a lump sum
distribution. If no election is indicated on the Participant's Deferral Election
Agreement, the Participant's termination benefit shall be paid to him in annual
payments over three years beginning no later than 120 days after termination of
employment. If the Participant's account is to be paid in annual installments,
the account shall be valued in accordance with Section 10.3(b), using the
termination date as the Valuation Date, and the timing and form of payments
shall be determined in accordance with Sections 10.5 and 10.6.

         10.8 CHANGE IN PAYMENT OPTION. A Participant's election regarding the
distribution of his account on his Deferral Election Agreement shall be
effective for all distributions from the Participant's account on the January 1
immediately following execution of his Deferral Election Form and shall remain
in effect until a different election is indicated by the Participant on a
subsequent Deferral Election Form. The payment options selected by the
Participant on his Deferral Election Agreement may be changed at any time by the
Participant submitting a new payment selection to the Committee or Board, but a
change shall be effective only if it is received by the Committee or Board at
least 12 months before payments under the Plan commence.

         10.9 HARDSHIP WITHDRAWAL BENEFITS. At any time prior to a distribution
in accordance with Section 10.6, a Participant may request that the Committee or
Board make a distribution to him of all or part of his Deferred Account within
120 days. Such distribution shall be made only if the Committee or Board
determines that the Participant is suffering from a financial hardship that
cannot be satisfied from his normal sources of income, and the distribution
shall be limited to the amount required to meet the financial hardship. In
making these determinations, the Committee or Board shall utilize the
regulations proposed or adopted by the U.S. Department of Treasury pursuant to
Section 401(k) of the Code and the rules under the Savings Plan. A financial
hardship shall first be satisfied from (i) a loan under the provisions of the
Savings Plan, (ii) the MCN Executive Deferred

                                       10

<PAGE>   16

Compensation Plan, and (iii) the Supplemental Savings Plan, before a hardship
distribution may be made from the Plan.

         10.10 INTERACTION WITH THE MCN ENERGY GROUP MANDATORY DEFERRED
COMPENSATION PLAN. The portion of any Award required to be deferred under The
MCN Energy Group Mandatory Deferred Compensation Plan will be deemed to be
deferred in accordance with Section 10.1 of the Plan.

                                   ARTICLE 11
                               FUNDING OF BENEFITS

         11.1 UNFUNDED PLAN. The Plan shall be unfunded. All benefits payable
under the Plan shall be paid from the Corporation's general assets. The
Corporation shall not be required to set aside or hold in trust any funds for
the benefit of a Participant or Beneficiary, who shall have the status of a
general unsecured creditor with respect to the Corporation's obligation to make
benefit payments pursuant to the Plan. Any assets of the Corporation available
to pay Plan benefits shall be subject to the claims of the Corporation's general
creditors and may be used by the Corporation in its sole discretion for any
purpose. No employee shall have voting or other rights with respect to such
shares of Common Stock prior to the delivery of such shares. The Corporation
shall not, by any provisions of the Plan, be deemed to be a trustee of any
Common Stock or any other property under the Plan, and any liabilities of the
Corporation to any employee pursuant to the Plan shall be those of a debtor
pursuant to such contract obligations as are created by or pursuant to the Plan,
and the rights of any employee, former employee, or beneficiary under the Plan
shall be limited to those of a general creditor of the Corporation. In its sole
discretion, the Board may authorize the creation of trusts or other arrangements
to meet the obligations of the Corporation and each other Participating
Corporation under the Plan provided, however, that the existence of such trusts
or other arrangements is consistent with the unfunded status of the Plan.

         11.2 NON-ERISA PLAN. The Plan is intended to provide benefits for "a
select group of management or highly compensated employees" within the meaning
of Sections 201, 301 and 401 of the Employee Retirement Income Security Act of
1974, as amended ("ERISA"), and therefore to be exempt from Sections 2, 3 and 4
of Title 1 of ERISA. Accordingly, the Plan shall terminate and, existing account
balances and other benefits in pay status shall be paid in a single, actuarially
equivalent lump-sum and no further benefits, vested or non-vested, shall be paid
hereunder in the event it is determined by a court of competent jurisdiction or
by an opinion of counsel that the Plan constitutes an employee pension benefit
plan within the meaning of Section 3(2) of ERISA which is not so exempt.

                                       11

<PAGE>   17

                                   ARTICLE 12
                                TAX WITHHOLDINGS

         12.1 TAX WITHHOLDING. The Corporation shall not make the delivery of
any shares of Common Stock until the Participant has made satisfactory
arrangements for the payment of any applicable withholding taxes. The
tax-withholding obligation may be satisfied by any of the following means, a
combination of such means, or any other means established by the Committee or
Board:

                  (a) tendering cash payment;

                  (b) authorizing the Corporation to (i) withhold up to 100% of
the Common Stock to be issued and (ii) facilitate the sale of such stock; or

                  (c) delivery to the Corporation by the Participant of owned
and unencumbered shares of Common Stock having an aggregate fair market value on
the date the withholding tax arises less than or equal to the amount of the
withholding tax obligation.

The Participant must satisfy the tax-withholding obligation no later than 30
days from the date the Award vests. The Committee or Board may establish
procedures it deems appropriate to assist a Participant in making such payment.

                                   ARTICLE 13
                   SELECTION OF AND PAYMENTS TO A BENEFICIARY

         13.1 BENEFICIARY DESIGNATION. A Participant shall designate a
beneficiary on his Beneficiary Designation Form, as provided in Attachment V.
The designation of a beneficiary other than the Participant's spouse must be
consented to in writing by the spouse. If a Participant has not designated a
beneficiary, or if a designated beneficiary is not living or in existence at the
time of a Participant's death, any death benefits payable under the Plan shall
be paid to the Participant's spouse, if then living, and if the Participant's
spouse is not then living, to the Participant's estate.

         13.2 CHANGE IN BENEFICIARY DESIGNATION. A Participant may change the
designated beneficiary, subject to the restriction in Section 13.1, from time to
time by filing a new written designation with the Committee or Board. Such
designation shall be effective upon receipt by the Committee or Board.

         13.3 PRE-RETIREMENT SURVIVOR BENEFIT. If a Participant dies prior to
completion of the Deferral Period, his Beneficiary shall be entitled to receive
a distribution of the Participant's Deferred Account. The distribution to a
beneficiary shall be paid in Common Stock equal to the number of shares of
Common Stock deemed to be held in the Participant's Deferred Account and valued
at the closing price of MCN Common Stock on the New York Stock Exchange
composite tape on the day of the Participant's death. The distribution shall be
paid in accordance with the Participant's selection on his Deferral Form; either
in annual installments over a three-year period, or as a lump sum distribution.
If the Participant's account is to be paid in annual installments, the account
shall be valued in accordance with Section 10.3(b), using the Participant's date
of death as the Valuation Date, and the timing and form of payments shall be
determined in accordance with Sections 10.5 and 10.6.

                                       12

<PAGE>   18

Payments to the beneficiary shall begin as soon as practicable, but in no event
later than one year following the Participant's death.

         13.4 POST-RETIREMENT SURVIVOR BENEFIT. If a Participant dies subsequent
to the start of his distribution payments under Section 10.5, his beneficiary
shall be entitled to continue to receive the distribution of the Participant's
Deferred Account for the remainder of the period over which benefits were being
paid to the deceased Participant.

                                   ARTICLE 14
                            AMENDMENT AND TERMINATION

         14.1 AMENDMENT, MODIFICATION, AND TERMINATION. The Committee or Board
may at any time and from time to time, alter, amend, suspend, or terminate the
Plan in whole or in part; provided, however, that no amendment which requires
shareholder approval in order for the Plan to continue to comply with Rule 16b-3
under the Securities Exchange Act of 1934, including any successor to such Rule,
shall be effective unless such amendment shall be approved by the requisite vote
of shareholders of the Corporation entitled to vote thereon.

         14.2 AWARDS PREVIOUSLY GRANTED. No termination, amendment, or
modification of the Plan shall adversely affect in any material way any Award
previously granted under the Plan, without the written consent of the
Participant holding such Award.

         14.3 RIGHT TO SUSPEND. If the Board determines that payments under
Sections 7.1, 9.3, 9.4 or 10.5 of the Plan would have a materially adverse
affect on the Company's ability to carry on its business, the Board may suspend
any or all such payments temporarily for such time as in it sole discretion it
deems advisable, but in no event for a period in excess of one year. The Company
shall pay such suspended payments in a lump sum distribution of (i) Common Stock
for payments under Sections 9.3, 9.4 and 10.6, and (ii) cash for payments under
Section 7.1, immediately upon the expiration of the period of suspension.

         14.4 RIGHT TO ACCELERATE. The Board in its sole discretion may
accelerate all vested benefits upon termination of the Plan, and pay such
benefits in a single, actuarially equivalent lump-sum distribution of Common
Stock.

                                       13

<PAGE>   19

                                   ARTICLE 15
                                  MISCELLANEOUS

         15.1 NO RIGHT OF CONTINUED EMPLOYMENT. Neither the establishment of the
Plan, the granting of an Award, or the payment of any benefits hereunder or any
action of the Corporation or of the Board or of the Committee shall be held or
construed to confer upon any person any legal right to be continued in the
employ of the Corporation or its direct or indirect subsidiaries, each of which
expressly reserves the right to discharge any employee whenever the interest of
any such Corporation in its sole discretion may so require without liability to
such Corporation, the Board or the Committee except as to any rights which may
be expressly conferred upon such employee under the Plan.

         15.2 DELIVERY OF SHARES. No shares shall be delivered pursuant to the
payment of any Award unless the requirements of such laws and regulations, as
may be deemed by the Committee or Board to be applicable thereto, are satisfied.

         15.3 TRANSFER AND LEAVE OF ABSENCE. A transfer of a Key Employee from a
Participating Corporation to an Affiliated Company and a leave of absence duly
authorized in writing by the Participating Corporation, for military service or
sickness, or for any other purpose approved by the Participating Corporation,
shall not be deemed a termination of employment.

         15.4 MICHIGAN LAW TO GOVERN. All questions pertaining to the
construction, regulation, validity, and effect of the provisions of the Plan
shall be determined in accordance with the laws of the State of Michigan.

         15.5 FORFEITURES. Notwithstanding any other provisions of this Plan, if
the Committee or Board finds by a majority vote, after full consideration of the
facts, that a Participant, before or after termination of his employment with
the Corporation or an Affiliated Company for any reason:

                  (a) committed or engaged in fraud, embezzlement, theft,
commission of a felony, or proven dishonesty in the course of his employment by
the Corporation or its subsidiaries, which conduct damaged the Corporation or
its subsidiaries, or disclosed trade secrets of the Corporation or its
subsidiaries;

                  (b) participated, engaged in, or had a financial or other
interest, whether as an employee, officer, director, consultant, contractor,
shareholder, owner, or otherwise, in any commercial endeavor in the United
States which has a significant competitive impact on the business of the
Corporation or its subsidiaries without the written consent of the Corporation
or its subsidiaries; or

                  (c) has taken any other action that has a significant adverse
impact in the Corporation or its subsidiaries,

the Participant shall forfeit all outstanding Performance Shares which are not
vested and all unexercised Stock Options. This forfeiture requirement shall not
apply to Awards that have been deferred under Article 10. Clause (b) shall not
be deemed to have been violated solely by reason

                                       14

<PAGE>   20

of the Participant's ownership of stock or securities of any publicly owned
corporation, if that ownership does not result in effective control of the
Corporation.

                  The decision of the Committee or Board as to the cause of the
Participant's discharge, the damage done to the Corporation or its subsidiaries,
and the extent of the Participant's competitive activity shall be final. No
decision of the Committee or Board, however, shall affect the finality of the
discharge of the Participant by the Corporation or its subsidiaries in any
manner.

         15.6 GENDER, NUMBER AND HEADING. Whenever any words are used herein in
the masculine gender, they shall be construed as though they were also used in
the feminine gender in all cases where they would so apply. Whenever any words
used herein are in the singular form, they shall be construed as though they
were also used in the plural form in all cases where they would so apply.
Headings of sections and subsections as used herein are inserted solely for
convenience and reference and constitute no part of the Plan.

                                   ARTICLE 16
                                CHANGE IN CONTROL

         16.1 CHANGE IN CONTROL. In the case of a Change in Control (as defined
in the MCN Energy Group Inc. Stock Incentive Plan), each Award shall immediately
be fully vested and any restrictions on the transfer of previously issued stock
shall lapse. For this purpose, the number of Performance Shares which shall vest
shall in no event be less than one hundred percent (100%) of the initial grant;
provided, however, that for each outstanding award year, if the Corporation is
ranked in the first or second quartile of the peer group during the second half
of the performance cycle at the time of the Change in Control, the number of
Performance Shares which shall vest shall be two hundred percent (200%) or one
hundred fifty percent (150%), respectively, of the initial grant. Such Award
shall be paid within thirty (30) days of such Change in Control, either in
shares of Common Stock or if the Corporation no longer has common stock
outstanding, the same consideration received by the Corporation's shareholders
upon the consummation of the Change in Control transaction.

         Performance Shares that have been previously deferred in accordance
with Article 10 shall be transferred to the MCN Energy Group Executive Deferred
Compensation Plan. Prior to such transfer, each Participant's Deferred Account
shall be converted from denomination in Common Stock to cash based on the higher
of a Common Stock price of $28.50 or .775 times the DTE Energy Company common
stock price offered to the Corporation's shareholders upon the consummation of
the Change in Control transaction.

         Nothwithstanding any other section in this Plan, in a Change in Control
situation, the Committee shall, in its absolute discretion, have the power to:

         (a)      cancel, effective immediately prior to the occurrence of such
                  event, each unexercised Stock Option outstanding immediately
                  prior to such event (whether or

                                       15

<PAGE>   21
                  not exercisable) and, in full consideration of such
                  cancellation, pay to the Participant to whom such Stock Option
                  was granted an amount in cash for each share of Common Stock
                  subject to such Stock Option equal to the excess of (1) the
                  value of the property, as determined under the provisions of
                  Section 9.12 of the MCN Stock Incentive Plan, over (2) the
                  strike price of the Stock Option; and

         (b)      provide Participants with a choice of the form of the
                  distribution of all Performance Shares. Such distribution
                  forms shall include (1) 100% Common Stock, (2) 50% Common
                  Stock and 50% cash, and (3) 100% cash. If a Participant elects
                  to receive 100% Common Stock, such Participant must present a
                  check to the Company for the amount of taxes computed on the
                  distribution. If a Participant fails to make a distribution
                  election, distribution shall be in the form of 50% Common
                  Stock and 50% cash.

         In addition, in a Change in Control situation, the Chairman of MCN
shall have the absolute discretion to direct that a lump sum payment be made to
a Participant equal to the value of such Participant's Deferred Account in the
year of the Change in Control if such payment will reduce the amount of any
potential excise tax imposed by Code Section 4999.

         16.2 TRANSFER TO RABBI TRUST. The Corporation has established a trust
pursuant to a Trust Agreement dated January 3, 1991 (the "Rabbi Trust"). The
terms of the Rabbi Trust provide that, in the event of a Change of Control and
thereafter, assets are to be transferred to such Rabbi Trust to provide benefits
under the Plan. The Corporation shall make all transfers of funds required by
the Rabbi Trust in a timely manner and shall otherwise abide by the terms of the
Rabbi Trust. The transfer of funds required by this section shall be made in
shares of Common Stock.

         16.3 JOINT AND SEVERAL LIABILITY. Upon and at all times after a Change
in Control, the liability under the Plan of the Corporation and each Affiliated
Company that has adopted the Plan shall be joint and several so that the
Corporation and each such Affiliated Company shall each be liable for all
obligations under the Plan to each employee covered by the Plan, regardless of
the corporation by which such employee is employed.

                                       16

<PAGE>   22

              IN WITNESS WHEREOF, the undersigned officer of the Corporation has
executed this Plan as of this 15th day of December, 1999, pursuant to the
resolution adopted by the Board of Directors of the Corporation.

                                      MCN ENERGY GROUP INC.

                                      BY:
                                         --------------------------------
                                      Daniel L. Schiffer, Senior Vice President,
                                      General Counsel and Secretary

                                       17

<PAGE>   23

                                                                    ATTACHMENT I

                             MCN ENERGY GROUP, INC.

                              COMPARISON COMPANIES

Due to MCN's continued transition to a diversified energy holding company, a
change in the companies making up the peer group for measuring Award values and
payouts was made beginning with the 1999 plan year.

<TABLE>
<CAPTION>

           PEER GROUP A                                                    PEER GROUP B
           ------------                                                    ------------
<S>                                                             <C>
  1.   CMS Energy Corporation                                    1.   CMS Energy Corporation
  2.   Coastal Corporation                                       2.   Columbia Gas System, Inc.
  3.   Columbia Gas System, Inc.                                 3.   Consolidated Natural Gas Company
  4.   Consolidated Natural Gas Company                          4.   DTE Energy
  5.   Enron Corporation                                         5.   El Paso Energy
  6.   Equitable Resources, Inc.                                 6.   Enbridge Inc.
  7.   K N Energy, Inc.                                          7.   Equitable Resources, Inc.
  8.   Marketspan Corporation (Brooklyn Union)                   8.   KN Energy
  9.   MCN Energy Group Inc.                                     9.   MCN Energy Group Inc.
 10.   National Fuel Gas Company                                 10.  MDU Resources
 11.   ONEOK Inc.                                                11.  National Fuel Gas Company
 12.   Questar Corporation                                       12.  ONEOK, Inc.
 13.   Sonat Inc.                                                13.  Peoples Energy
 14.   Southwest Energy Company                                  14.  Questar
 15.   The Williams Companies                                    15.  Sempra Energy
 16.   WICOR, Inc.                                               16.  Westcoast Energy

</TABLE>

                 APPLICATION OF PEER GROUP TO PERFORMANCE CYCLES

<TABLE>
<CAPTION>

    INITIAL GRANTS                                                        FINAL AWARDS
    --------------                                                        ------------
Period          Year    Peer Group                            Period          Year    Peer Group
------          ----    ----------                            ------          ----    ----------
<S>             <C>     <C>                                   <C>             <C>     <C>
1996 - 1998     1999        B                                 1996 - 1998     1999        A
1997 - 1999     2000        B                                 1997 - 1999     2000        B
1998 - 2000     2001        B                                 1998 - 2000     2001        B

</TABLE>

<PAGE>   24

                                                                   ATTACHMENT II

         TABLE I - INITIAL INDIVIDUAL AWARD - 1999
<TABLE>
<CAPTION>

                           --------- ------------------------ --------------------------
                                                                TARGET % BASE SALARY
                           TIER      DESCRIPTION
                           ========= ======================== ==========================
<S>                        <C>      <C>                      <C>
                               I     Chairman & CEO                     160%
                           --------- ------------------------ --------------------------
                              II     Vice Chairman/Pres              70 - 110%
                           --------- ------------------------ --------------------------
                             III     VP/Officer/Exec. Dir.            35 - 60%
                           --------- ------------------------ --------------------------
                              IV     Director                         25 - 35%
                           --------- ------------------------ --------------------------
                              V      Sr. Staff/Mgmt.                  15 - 25%
                           --------- ------------------------ --------------------------
                           VI & VII  Discretionary              Up to 20% Population
                                                                 Max. 10% of Salary
                           --------- ------------------------ --------------------------
</TABLE>

         The Initial Individual Award shall be made 50% in Performance Shares
         and 50% in Stock Options. Stock Options shall be issued on a ratio to
         be determined by the Committee based on the fair market value of Common
         Stock as determined in accordance with Section 6.2(c) of the Plan.

         TABLE II - Initial Grant of Performance Shares- 1999*
<TABLE>
<CAPTION>

     ----------------------------------------------------------------------
                                     INITIAL GRANT
     ==================================== =================================
                                                   % OF INITIAL
                PEER RANKING                     INDIVIDUAL AWARDS
     ==================================== =================================
<S>                                      <C>
                1st Quartile                         125 - 200%
                2nd Quartile                          75 - 150%
                3rd Quartile                          25 - 100%
                4th Quartile                            0 - 50%
     ----------------------------------------------------------------------
</TABLE>

         TABLE III - Final Award of Performance Shares - 1999*
<TABLE>
<CAPTION>

        ---------------------------------------------------------------------
                                    FINAL AWARD
        ===================================== ===============================
                                                   % OF
            PEER RANKING                      INITIAL GRANT
        ===================================== ===============================
<S>                                          <C>
            1st Quartile                        125 - 200%
            2nd Quartile                         75 - 150%
            3rd Quartile                         25 - 100%
            4th Quartile                          0 - 50%
        ---------------------------------------------------------------------
</TABLE>

<PAGE>   25

                                                                   ATTACHMENT II

*  Table II and III only apply to Performance Shares.

<PAGE>   26

                                                                  ATTACHMENT III

                                MCN ENERGY GROUP
                            LONG-TERM INCENTIVE PLAN

                        COMMON STOCK OWNERSHIP GUIDELINES

<TABLE>
<CAPTION>

                         ---------------------------------- ---------------------------------------
                         TIER                               GUIDELINE
                         ---------------------------------- ---------------------------------------
<S>                                                        <C>
                         I                                  8 times salary
                         ---------------------------------- ---------------------------------------
                         II                                 5 times salary
                         ---------------------------------- ---------------------------------------
                         III                                3 times salary
                         ---------------------------------- ---------------------------------------
                         IV and V                           1 times salary
                         ---------------------------------- ---------------------------------------
                         VI and VII                         None
                         ---------------------------------- ---------------------------------------
</TABLE>

For purposes of meeting these guidelines, the following shares of Common Stock
are included:

-    Actual shares owned outright

-    Shares held in the MCN Energy Group Savings and Stock Ownership Plan

-    Share equivalents in deferral plans

-    Unvested Performance Shares

For purposes of determining when shares received from the Plan may be sold,
unvested Performance Shares are excluded.

<PAGE>   27

                                                                   ATTACHMENT IV

                    MCN ENERGY GROUP LONG-TERM INCENTIVE PLAN
                            PERFORMANCE SHARE PROGRAM
                             DEFERRAL ELECTION FORM
================================================================================

This Benefit Agreement is entered into between                     (the
"Company") and                   , (the "Employee"), pursuant to the MCN Energy
Group Long-Term Incentive Plan (the "Plan"), with an Effective Date
of                             .

================================================================================
     ELECTION TO PARTICIPATE

     By the execution of this Benefit Agreement, the Employee hereby elects to
     participate in the Plan, and understands and agrees to the following:

     I.  Deferrals must be stated as a percentage of the Final Award to be
         received, with a minimum deferral of 50% of the Final Award.
     II. Up to 100% of the Final Award is eligible for deferral, less applicable
         FICA tax on the Final Award.
     III. The Deferral Period remains in effect until termination of employment.
     IV. The most recent Deferral Period and Distribution election shall be
         effective for all amounts payable to the Employee under the Plan.
     V.  All Deferral elections are irrevocable and can be modified only in
         accordance with the Plan.

         I ELECT TO DEFER    % OF THE MCN ENERGY GROUP INC. COMMON STOCK I WILL
         RECEIVE AS A FINAL AWARD OF THE PERFORMANCE SHARES INITIALLY GRANTED TO
         ME ON                          . I UNDERSTAND THAT MY DEFERRAL PERIOD
         FOR ALL SHARE EQUIVALENTS HELD FOR ME UNDER THE PLAN SHALL REMAIN IN
         EFFECT UNTIL MY TERMINATION OF EMPLOYMENT WITH THE COMPANY.

================================================================================
     DIVIDEND EQUIVALENT PAYMENT ELECTION

     I elect to have the dividend equivalents (equal to 50% of the MCN Energy
     Group Inc. common stock dividend rate) from my deferral account shares:
           []    Paid to me in caSH; or
           []    Reinvested in my deferral account.

================================================================================
     DISTRIBUTION ELECTIONS (PLEASE MAKE ONE (1) ELECTION PER BENEFIT CATEGORY)

     A.    Pre-Retirement Survivor Benefits:
           []    Single Lump Sum Payment; OR
           []    Annual Installments Over a Three (3) Year Period

     B.    Normal Retirement Benefits:
           []    Single Lump Sum Payment; or
           []    Annual Installments Over a ____ Year Period (not to exceed 15
                 years)

     C.    Termination Prior To Retirement:
           []    Single Lump Sum Payment; or
           []    Annual Installments Over a Three (3) Year Period

     NOTE: A Post-Retirement Survivor Benefit will continue payments which have
     commenced under any of the Installment Payout Options until the full
     payment period is satisfied.
================================================================================
     ACCEPTANCE OF PLAN TERMS AND BENEFITS

     The Employee hereby agrees to all of the terms and conditions of the Plan
     as set forth in the Plan document. Participation in the Plan indicates the
     Employee's acceptance on his/her own behalf and on the behalf of his/her
     designated Beneficiary of the terms of entitlement to all Plan benefits
     whether payable to the Employee or his/her survivor. The Employee further
     understands that no assets of the Company are to be segregated to pay
     benefits under the Plan. No officer, employee, or representative of the
     Company is authorized to vary such terms and conditions verbally or in
     writing. The Plan may be modified only by an amendment to the Plan adopted
     by the Committee or the Board of Directors. The employee understands that a
     distribution election other than a lump sum will result in a distribution
     of a set dollar amount, plus interest, and not a set number of shares of
     Common Stock.

----------         --------------------               --------------------------
Date               Print Employee's Name              Employee's Signature

<PAGE>   28

================================================================================
                                MCN ENERGY GROUP
                            LONG-TERM INCENTIVE PLAN
                          BENEFICIARY DESIGNATION FORM
================================================================================

---------------------------      -----------------------       -----------------
Employee Name (Please Print)     Social Security Number        Employee I.D. #

     DESIGNATION OF BENEFICIARY

     The Plan provides certain death benefits to the Employee's designated
     Beneficiary. You may change your beneficiary designation at any time by
     executing a new Beneficiary Designation Form. Beneficiary Designation Forms
     are available through the Plan Committee.

     I hereby designate the following Beneficiary, in the event of my death, for
     any and all survivor benefits payable under the MCN Energy Group Long-Term
     Incentive Plan:

     Primary Beneficiary:
                         -------------------------------------------------------

     Relationship to Employee:                     Address:
                              --------------------         ---------------------
                                                           ---------------------

     Contingent Beneficiary:
                            ----------------------------------------------------

     Relationship to Employee:                     Address:
                                                           ---------------------
                                                           ---------------------

In the event none of the above-named beneficiaries survive me, any unpaid
amounts shall be paid to my lawful successor in interest. I reserve the right to
change this beneficiary designation at any time by filing with the Committee or
its designee a new Beneficiary Designation Form. I understand that my most
recent election as to the beneficiary designation will apply to all award
amounts payable to me at any time.

     ----------                             --------------------------
     Date                                   Employee's Signature

================================================================================
     SPOUSAL CONSENT (REQUIRED FOR ALL NON-SPOUSAL PRIMARY BENEFICIARY
     DESIGNATIONS)

     I hereby consent to the above election of Beneficiary by my spouse for
     survivor benefits payable under the MCN Energy Group Long-Term Incentive
     Plan. Further, I hereby acknowledge that I understand (1) that the effect
     of my consent may be to forfeit benefits I would be entitled to receive
     upon my spouse's death; (2) that my spouse's designation is not valid
     unless I consent to it; and (3) that my consent is irrevocable unless my
     spouse revokes the designation above.

     ----------       ------------------------        --------------------------
     Date             Print Spouse's Name             Spouse's Signature

================================================================================

<PAGE>   29

                                MCN ENERGY GROUP
                            LONG-TERM INCENTIVE PLAN

                              Historical Background

      2/25/93     Plan adopted.

      5/23/96     Plan amended and restated.

      10/1/97     Plan amended and restated.

      2/24/99     Plan amended and restated.

      12/15/99    MCN Energy Group Inc. Minutes of Regular Meeting of Board of
                  Directors approved the Plan amendment and restatement
                  effective December 15, 1999, to reflect the following changes:

                  The Plan was amended and restated to reflect the language in
                  Section 16.1 as shown. Prior to amendment, Section 16.1 was
                  incomplete, as follows:

                                    16.1 CHANGE IN CONTROL. In the case of a
                           Change in Control (as defined in the MCN Energy Group
                           Inc. Stock Incentive Plan), each Award shall
                           immediately be fully vested and any restrictions on
                           the transfer of previously issued stock shall lapse.
                           For this purpose, the number of Performance Shares
                           which shall vest shall in no event be less than one
                           hundred percent (100%) of the initial grant;
                           provided, however, that for each outstanding award
                           year, if the Corporation is ranked in the first or
                           second quartile of the peer group during the second
                           half of the performance cycle at the time of the
                           Change in Control, the number of Performance Shares
                           which shall vest shall be two hundred percent (200%)
                           or one hundred fifty percent (150%), respectively, of
                           the initial grant. Such Award and all Performance
                           Shares previously deferred shall be paid within
                           thirty (30) days of such Change in Control, either in
                           shares of Common Stock or if the Corporation no
                           longer has common stock outstanding, the same
                           consideration received by the Corporation's
                           shareholders upon the consummation of the Change in
                           Control transaction. The Committee shall, in its
                           absolute discretion, have the power to:

                                            (a) cancel, effective immediately
                                    prior to the occurrence of such event, each
                                    unexercised Stock Option outstanding
                                    immediately prior to such event (whether or
                                    not exercisable) and, in full consideration
                                    of such cancellation, pay to the Participant
                                    to whom such Stock Option was granted an
                                    amount in cash for each

<PAGE>   30
                                                                    ATTACHMENT V

                                    share of Common Stock subject to such Stock
                                    Option equal to the excess of (1) the value,
                                    as determined by the Committee in its
                                    absolute discretion, of the property

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