Document:

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                                                                    EXHIBIT 10.5

                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                    (AS RESTATED EFFECTIVE DECEMBER 15, 1999)

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                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
         SECTION                                                                                               PAGE
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<S>                              <C>                                                                           <C>
SECTION 1 - DEFINITIONS...........................................................................................1
                      1.01.         "Account".....................................................................1
                      1.02.         "Additional Pension Plan Benefit".............................................1
                      1.03.         "Additional Savings Plan Benefit"..... .......................................2
                      1.04          "Affiliated Employer..........................................................2
                      1.05.         "Anniversary Date"............................................................2
                      1.06.         "Annual Base Salary"..........................................................2
                      1.07.         "Annual Incentive Compensation"...............................................2
                      1.08.         "Beneficiary".................................................................2
                      1.09.         "Benefit Agreement"...........................................................3
                      1.10.         "Board of Directors"..........................................................3
                      1.11.         "Code"........................................................................3
                      1.12.         "Committee"...................................................................3
                      1.13.         "Company".....................................................................3
                      1.14.         "Deferral"....................................................................3
                      1.15.         "Deferral Period".............................................................3
                      1.16.         "Disability...................................................................3
                      1.17.         "Effective Date"..............................................................3
                      1.18.         "ERISA".......................................................................3
                      1.19.         "Executive"...................................................................3
                      1.20.         "In Pay Status"...............................................................4
                      1.21.         "Leave".......................................................................4
                      1.22.         "Participant".................................................................4
                      1.23.         "Pension Plan"................................................................4
                      1.24.         "Plan"........................................................................4
                      1.25.         "Plan Interest Rate"..........................................................4
                      1.26.         "Plan Year"...................................................................4
                      1.27.         "Post-Retirement Survivor Benefit"............................................4
                      1.28.         "Pre-Retirement Survivor Benefit".............................................4
                      1.29.         "Retirement Date".............................................................4
                      1.30.         "Retirement Income Benefit"...................................................4
                      1.31.         "Savings Plan"................................................................5
                      1.32.         "Social Security Wage Base"...................................................5
                      1.33.         "Spouse"......................................................................5

SECTION 2 - PARTICIPATION.........................................................................................5

                      2.01.         Commencement of Participation.................................................5
                      2.02.         Deferrals.....................................................................5
</TABLE>
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<TABLE>
<CAPTION>
         SECTION                                                                                               PAGE
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<S>                                 <C>                                                                        <C>
                      2.03.         Election of Deferral..........................................................5
                      2.04.         Forgo Deferral for a Plan Year................................................6
                      2.05.         Increased Deferral............................................................6
                      2.06.         Establishment of Account......................................................6
                      2.07.         Interaction with Other Plans..................................................7

SECTION 3 - FUNDING OF BENEFITS...................................................................................7

                      3.01.         Unfunded Plan.................................................................7
                      3.02.         Interest......................................................................7

SECTION 4 - CLAIMS PROCEDURE......................................................................................8

                      4.01.         Benefit Claims Procedure......................................................8
                      4.02.         Appeals Procedure.............................................................8

SECTION 5 - RETIREMENT INCOME BENEFITS............................................................................9

                      5.01.         Normal Retirement Benefit.....................................................9
                      5.02.         Termination Benefit..........................................................10
                      5.03.         Disability...................................................................11
                      5.04.         Hardship Withdrawal Benefits.................................................11

SECTION 6 - PRE-RETIREMENT SURVIVOR BENEFITS.....................................................................12

                      6.01.         Pre-Retirement Survivor Benefit..............................................12
                      6.02          Proof of Insurability........................................................13
                      6.03.         Exclusion for Suicide or Self-Inflicted
                                    Injury.......................................................................13

SECTION 7 - POST-RETIREMENT SURVIVOR BENEFITS....................................................................13

SECTION 8 - VESTING OF BENEFITS..................................................................................14

SECTION 9 - ADDITIONAL PROVISIONS AFFECTING BENEFITS.............................................................14

                      9.01.         Benefit Agreement............................................................14
                      9.02.         Leave of Absence.............................................................14
                      9.03.         Alternative Forms of Benefit.................................................14
                      9.04.         Tax Withholding..............................................................14
</TABLE>

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<TABLE>
<CAPTION>
         SECTION                                                                                               PAGE
<S>                                 <C>                                                                       <C>
SECTION 10 - ADMINISTRATION OF THE PLAN..........................................................................15
                      10.01.        Duties and Power.............................................................15
                      10.02.        Benefit Statements...........................................................15

SECTION 11 - AMENDMENT, SUSPENSION, AND TERMINATION..............................................................15

                      11.01.        Right to Amend or Terminate..................................................15
                      11.02.        Right to Surrender...........................................................15
                      11.03.        Non-ERISA Plan...............................................................16
                      11.04.        Right to Accelerate..........................................................16

SECTION 12 - MISCELLANEOUS.......................................................................................16

                      12.01.        Right to Continued Employment................................................16
                      12.02.        Prohibition Against Alienation...............................................16
                      12.03.        Sayings Clause...............................................................16
                      12.04.        Payment of Benefit of Incompetent............................................17
                      12.05.        Spouse's Interest............................................................17
                      12.06.        Successors...................................................................17
                      12.07.        Gender, Number and Heading...................................................17
                      12.08.        Legal Fees and Expenses......................................................17
                      12.09.        Choice of Law................................................................17
                      12.10.        Affiliated Employees.........................................................17

SECTION 13 - CHANGE IN CONTROL PROVISIONS........................................................................18

                      13.01         General......................................................................18
                      13.02         Transfer to Rabbi Trust......................................................18
                      13.03         Lump Sum Payments............................................................18
                      13.04         Joint and Several Liability..................................................18
                      13.05         Dispute Procedures...........................................................18
                      13.06         Definition of Change in Control..............................................19
</TABLE>

Historical Background

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                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                    (as restated effective December 15, 1999)

         MCN Energy Group Inc., a Michigan corporation (hereinafter referred to
as "MCN" or the "Company"), has adopted the MCN Energy Group Executive Deferred
Compensation Plan (hereinafter referred to as the "Plan") to provide
supplemental retirement income for certain Executives (hereinafter defined) and
to provide a measure of security for certain Executives through the payment of
death benefits to their Beneficiaries.

         The Company previously adopted the MCN Management Incentive Bonus
Compensation Plan ("Incentive Plan") which permitted participants to defer
awards made to them under the Incentive Plan. Effective as of January 1, 1990,
deferrals under the Incentive Plan were discontinued and account balances under
the Incentive Plan were transferred to the Plan.

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

                                    SECTION 1
                                   DEFINITIONS

         The following words and terms as used herein shall, unless the context
clearly requires a different meaning, have the respective meanings hereinafter
set forth.

         1.01.      "Account" means the record maintained by the Company of each
Participant's Deferrals, credited interest, Additional Pension Plan Benefit,
Additional Savings Plan Benefit, transfers from the MCN Energy Group Mandatory
Deferred Compensation Plan, transfers from the MCN Energy Group Long-Term
Incentive Plan and distributions under the Plan.

         1.02.      "Additional Pension Plan Benefit" means an additional
benefit under this Plan, equal to the present value at the date of retirement
under the qualified plan or other termination of employment of the difference
between (1) the benefit that the Participant would have been entitled to receive
under the Pension Plan if he had not elected to defer any amount under the Plan,
and (2) the benefit that the Participant is entitled to receive under the
Pension Plan.

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         1.03.      "Additional Savings Plan Benefit" means an additional
monthly benefit under this Plan, equal to the amount of any Company matching
contributions that would have been made on the Participant's deferred salary
under the terms of the Savings Plan plus (i) for periods from January 1, 1990 to
July 31, 1991, the income that would have been earned thereon based upon the
Participant's investment elections and the terms of the Savings Plan, and (ii)
for periods after July 31, 1991, interest based upon the Plan Interest Rate in
effect for such period which should be added to the Participant's account.

         1.04       "Affiliated Employer" 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 Company or any other employing
entity while such entity is under common control (within the meaning of Section
414(c) of the Code) with the Company.

         1.05.      "Anniversary Date" means any January 1 including or after
the Effective Date.

         1.06.      "Annual Base Salary" means annual base salary payable in
the current Plan Year before any 401(k) deferral or cafeteria plan election and
before any payroll deduction for taxes or any other purpose, but excluding any
bonus, fringe benefit or other form of remuneration.

         1.07.      "Annual Incentive Compensation" means the annual incentive
plan cash compensation earned in the current Plan Year and payable in the
subsequent Plan Year.

         1.08.      "Beneficiary" means the person, persons or entity designated
in writing by the Participant on forms provided by the Company to receive
distribution of certain death benefits under the Plan in the event of the
Participant's death. A Participant may change the designated Beneficiary from
time to time by filing a new written designation with the Committee, and such
designation shall be effective upon receipt by the Committee. 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.

         1.09.      "Benefit Agreement" means the benefit agreement described in
Section 9.01 relating to a Participant's commitment to defer Annual Base Salary,
as defined in Section 1.06, and/or Annual Incentive Compensation, as defined in
Section 1.07.

         1.10.      "Board of Directors" means the MCN Board of Directors.

                                       2
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         1.11.      "Code" means the Internal Revenue Code of 1986, as amended.

         1.12.      "Committee"  means the MCN Energy Group Inc.  Master Trust,
Retirement and Savings Plan Committee. The Committee is responsible for the
administration of the Plan.

         1.13.      "Company" means MCN Energy Group Inc., a Michigan
corporation, its successors and assigns, and any direct or indirect subsidiary
of MCN which has elected, with the consent of MCN, to participate in the Plan.

         1.14.      "Deferral" means the portion of a Participant's Annual Base
Salary and/or Annual Incentive Compensation that has been deferred in accordance
with Section 2.03. Deferral amounts are retained by the Company as part of its
general assets.

         1.15.      "Deferral Period" means the period  beginning  with the date
of the Participant's commencement of participation in the Plan and ending on the
earlier of
                    (a) the fifth Anniversary Date after such date; or

                    (b) the Participant's Retirement Date, as defined in Section
                        1.29.

         1.16.      "Disability" means the total and permanent inability, caused
by disease or bodily injury and originating after his designation as a
Participant, of an Executive to do substantially all the material duties of his
regular job, except that

                    (a) after such inability has continued for two years, such
         Executive shall be considered to be suffering Disability only if he
         cannot work for pay or profit at another job for which he is
         reasonably fitted by education, training or experience; and

                    (b) such Executive shall be considered to be suffering
         Disability only for those periods during which he is not working for
         pay or profit.

         1.17. "Effective Date" means January 1, 1990 and each January 1
thereafter.

         1.18 "ERISA" means the Employee Retirement Income security Act of 1974,
as amended from time to time.

         1.19. "Executive" means a management or highly compensated employee of
the Company who has been specifically designated by the Chairman of the Board of
Directors to be eligible for Plan participation. Such an employee shall remain
an Executive so long as this designation is not revoked by the Chairman of the
Board of Directors. Upon such revocation, the former Executive shall be entitled
to receive only those benefits which have been vested.

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         1.20.      "In Pay Status" means, with respect to a benefit under the
Plan, that a Participant or Beneficiary has met all of the requirements to
receive such benefit and it is being paid or is about to be paid to such
Participant or Beneficiary.

         1.21.      "Leave" means any period during which an Executive who is
employed by the Company immediately prior to the commencement thereof is absent
from the Company pursuant to a leave of absence granted with the permission of
the Company.

         1.22.      "Participant"  means an Executive who has made a written
election to participate in the Plan in accordance with Section 2.01.

         1.23.      "Pension Plan" means, with respect to a Participant, any
Company-sponsored qualified defined benefit plan under which the Participant is
eligible to participate.

         1.24.      "Plan"  means  the  MCN  Energy  Group  Executive  Deferred
Compensation  Plan, as described herein and as hereafter amended.

         1.25.      "Plan Interest Rate" means 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 Chairman of the Board of Directors.

         1.26.      "Plan  Year" means the period beginning January 1 and ending
December 31 of each year (the calendar year).

         1.27.      "Post-Retirement Survivor Benefit", as described in Section
7.01, means the benefit payable to the Beneficiary of a Participant who dies
after the commencement of his Retirement Income Benefit.

         1.28.      "Pre-Retirement Survivor Benefit", as described in Section
6.01, means the benefit payable to the Beneficiary of a Participant who dies
prior to his Retirement Date.

         1.29.      "Retirement Date" for a Participant covered by a Pension
Plan means any normal or early retirement date specified in the Pension Plan, as
defined in Section 1.23; and for a Participant covered by a Savings Plan, but
not covered by a Pension Plan, means any normal or early retirement date
specified in the Savings Plan, as defined in Section 1.31.

         1.30.      "Retirement Income Benefit" means the retirement benefit
described in Section 5.

         1.31.      "Savings Plan" means, with respect to a Participant, any
Company sponsored qualified defined contribution plan under which the
Participant is eligible to participate.

                                       4

<PAGE>   9

         1.32.      "Social Security Wage Base" means the maximum amount of
wages subject to the old-age, survivor and disability portion of the Federal
Insurance Contributions Act tax.

         1.33.      "Spouse" means an individual who is legally married
to a Participant under the laws of the state in which the Participant resides,
on the day immediately preceding the Participant's date of death.

                                    SECTION 2
                                  PARTICIPATION

         2.01.      Commencement of Participation. An Executive shall become a
Participant hereunder upon execution of a Benefit Agreement by the Executive no
later than (i) the October 30 prior to its Effective Date, or (ii) 30 days after
an employee is designated an Executive. A properly executed Benefit Agreement
shall be effective on the earlier of (i) January 1 immediately following the
execution of the Benefit Agreement, or (ii) the first pay period that is 30 days
after the employee is designated an Executive, and shall contain the items
described in this Section and in Sections 5.01, 6.01 and 9.01. Subject to
Sections 2.02, 2.04 and 2.05, the deferral election made in a Benefit Agreement
shall be irrevocable.

         2.02.      Deferrals. A Participant may continue to make the annual
Deferral provided under Section 2.03 with respect to his Benefit Agreement until
his designation as an Executive is revoked by the Chairman of the Board of
Directors, he terminates employment with the Company, he receives a hardship
withdrawal, or he revokes his Benefit Agreement after the completion of his
Deferral Period.

         2.03.      Election of Deferral. A Participant shall elect in his
Benefit Agreement the annual Deferral that he will make for each Plan Year in
which he is a Participant, in multiples of $1,000 except for the $3,000 minimum.
Such annual Deferral shall not exceed 30% of Annual Base Salary and 100% of
Annual Incentive Compensation less the Federal Insurance Contributions Act tax
on the Annual Incentive Compensation and shall not be less than $3,000.
An annual Deferral of Annual Base Salary cannot reduce the Participant's Annual
Base Salary below the Social Security Wage Base for the Plan Year. An annual
Deferral of Annual Incentive Compensation shall be stated as a flat amount and
shall not be greater than 100% of the Participant's current year Annual
Incentive Compensation less the Federal Insurance Contributions

                                       5

<PAGE>   10

Act tax on the Annual Incentive Compensation. A Participant's election shall be
irrevocable during the Deferral Period, subject to Sections 2.02, 2.04 and 2.05.
After a Participant's Deferral Period is completed, the Participant may elect on
an annual basis, before October 30, whether he wishes to make a Deferral for the
following Plan Year.

         2.04.      Forgo Deferral for a Plan Year. A Participant may elect, no
later than October 30 prior to its Effective Date, to forgo the Deferral for the
remainder of the Deferral Period. This election cannot be made for the first
year in the Deferral Period. If this election is made for a Plan Year, the
Participant shall not be permitted to participate in the Plan for the two-year
period beginning with the January 1 immediately following the election to forgo
the Deferral. If the Participant thereafter elects to participate in the Plan,
such Participant shall begin a new Deferral Period. If a Participant dies prior
to his Retirement Date while employed by the Company and during a period that an
election to forgo Deferral is in effect, the Participant's Beneficiary shall not
be entitled to the Pre-Retirement Survivor Benefit under Section 6.01, but shall
receive a lump sum distribution of an amount equal to the Participant's Account
balance as of the Participant's date of death. Such lump sum payment shall be
made not later than one hundred twenty (120) days after the Participant's date
of death.

         2.05.      Increased Deferral. A Participant may elect to increase the
annual Deferral that he will make for each Plan Year in which he is a
Participant by filing a new Benefit Agreement to that effect with the Committee.
The amount of any such increase shall be in multiples of $1,000, and the
increased annual Deferral shall not exceed the limits set forth in Section 2.03.
Such election will be effective on the January 1 after the new Benefit Agreement
is filed with the Committee. A Participant's election to increase the amount
deferred in a Plan Year will not preclude the Participant from reducing the
increased deferral in subsequent Plan Years. However, in no event may the
Deferral in subsequent Plan Years of the Deferral Period be reduced to an amount
less than the original annual Deferral amount.

         2.06.      Establishment of Account. The Committee shall establish an
Account for each Participant to which the Participant's Deferrals shall be
credited, interest in accordance with Section 3.02 shall be credited, the
Participant's account balance, if any, under the Incentive Plan shall be
credited, the Additional Pension Plan Benefit shall be credited, the Additional
Savings Plan Benefit shall be credited, transfers from the MCN Energy Group
Mandatory Deferred Compensation Plan and MCN Energy Group Long-Term Incentive
Plan shall be credited and

                                       6

<PAGE>   11

distributions shall be debited. A Participant's Deferrals shall be credited to
his Account as of the date the Deferral would have been paid to the Participant.
The Additional Pension Plan Benefit shall be credited to the Participant's
Account as of (i) the date of the Participant's retirement under the qualified
plan or other termination of employment for Participant's who have the
traditional benefit option under the Pension Plan, and (ii) each December 31 for
Participant's who have the cash balance option under the Pension Plan. The
Additional Savings Plan Benefit shall be credited to the Participant's Account
as of the end of each month for which the Participant makes a Deferral under the
Plan. A Participant whose Account includes a transfer of assets from the
Incentive Plan shall be treated as having satisfied a year of the Deferral
Period for each of the Participant's years of participation in the deferral
portion of the Incentive Plan.

         2.07.      Interaction with Other Plans. A Participant's Deferral may
result in a reduction of a Participant's benefit under the Pension Plan and the
Savings Plan due to restrictions imposed by the IRS on qualified plans. In order
to minimize the effect of this reduction, a Participant's Account shall be
credited with an Additional Pension Benefit and an Additional Savings Plan
Benefit.

                                    SECTION 3
                               FUNDING OF BENEFITS

         3.01.      Unfunded Plan. The Plan shall be unfunded. All benefits
payable under the Plan shall be paid from the Company's general assets. The
Company 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 Company's obligation to make benefit
payments pursuant to the Plan. Any assets of the Company available to pay Plan
benefits shall be subject to the claims of the Company's general creditors and
may be used by the Company in its sole discretion for any purpose.

         3.02.      Interest. Interest shall be credited and compounded to each
Participant's Account, including that portion of the Account attributable to the
benefit described in Section 2.07, on the last day of each month during each
Plan Year based upon the Plan Interest Rate in effect for such Plan Year for so
long as there remains an Account balance.

                                       7

<PAGE>   12

                                   SECTION 4
                                CLAIMS PROCEDURE

          4.01.     Benefit Claims Procedure. All applications for benefits
under the Plan shall be submitted to the Committee at the Company's principal
place of business. Applications for benefits must be in writing and must be
signed by the Participant or, in the case of a Pre-Retirement or Post-Retirement
Survivor Benefit, by the Beneficiary or legal representative of the deceased
Participant.  In the event of a Participant's death, a certified copy of the
death certificate will be required by the Committee. The Committee reserves the
right to require that the Participant furnish proof of his age prior to
processing any application. Each application shall be acted upon and approved or
disapproved within ninety (90) days following its receipt by the Committee. In
the event any application for benefits is denied in whole or in part, the
Committee shall notify the applicant in writing of such denial and of his right
to a review by the Committee and shall set forth, in a manner calculated to be
understood by the applicant, specific reasons for such denial, specific
references to pertinent Plan provisions on which the denial is based, a
description of any additional material or information necessary for the
applicant to perfect his application, an explanation of why such material or
information is necessary, and an explanation of the Plan's review procedure.

          4.02.     Appeals Procedure. Any person whose application for
benefits is denied in whole or in part may appeal such denial to the Committee
by submitting a written statement to the Committee within ninety (90) days after
receiving written notice from the Committee of the denial of the claim. A
written statement should:

                    (a) request a review by the Committee of the application for
                        benefits;

                    (b) set forth all of the grounds upon which the request for
                        review is based and any facts in support thereof; and

                    (c) set forth any issues or comments that the applicant
                        deems pertinent to his application.

          The Committee shall regularly review appeals applications submitted to
it. The Committee shall act upon each appeal within sixty (60) days after
receipt of the applicant's request for review by the Committee.

                                       8

<PAGE>   13

          The Committee shall make a full and fair review of each such
application and any written materials submitted by the applicant or the Company
in connection therewith and may require the Company or the applicant to submit
such additional facts, documents, or other evidence as the Committee in its sole
discretion deems necessary or advisable in making such a review. On the basis of
its review, the Committee shall make an independent determination of the
applicant's eligibility for benefits under the Plan. The decision of the
Committee on any application for benefits shall be final and conclusive upon all
persons.
          In the event that the Committee denies an application in whole or in
part, the Committee shall give written notice of the Committee's decision to the
applicant setting forth, in a manner calculated to be understood by the
applicant, the specific reasons for such denial and specific references to the
pertinent Plan provisions on which the Committee's decision was based.

                                    SECTION 5
                           RETIREMENT INCOME BENEFITS

          5.01.     Normal Retirement Benefit

                    (a) Each Participant who retires under the Pension or
Savings Plan on his Retirement Date after the completion of his Deferral Period
shall be entitled to a Retirement Income Benefit commencing on the first of the
month following the month in which his Retirement Date occurs. The Participant's
Retirement Income Benefit shall be paid, in accordance with the Participant's
selection in his Benefit Agreement, either in monthly payments over a period not
less than one year and not more than 15 years, or as a lump sum distribution of
the Participant's Account. The payment option selected by the Participant on his
Benefit Agreement may be changed at any time by the Participant by submitting a
new payment selection to the Committee, but a change shall be effective only if
it is received by the Committee at least 12 months before payments under the
Plan commence. 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

                                       9

<PAGE>   14

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.

                    (b) Each Participant who retires under the Pension Plan or
Savings Plan on his Retirement Date prior to the completion of his Deferral
Period shall receive a lump sum distribution in an amount equal to the
Participant's Account balance on his Retirement Date. Such distribution shall be
made no later than one hundred twenty (120) days after the Participant's
Retirement Date.

                    (c) Notwithstanding subparagraph (b) above, a Participant
whose Deferral Period is less than five years may accelerate his Deferrals so
that the sum of the Deferrals at the end of his Deferral Period is equal to five
times his annual Deferral. This acceleration shall be effective beginning with
the Plan Year following the year a new Benefit Agreement indicating an increased
annual Deferral is filed with the Committee. The Participant's Retirement Income
Benefit shall be paid in accordance with the Participant's selection in his
Benefit Agreement.

         5.02.      Termination Benefit. A Participant who terminates employment
prior to retirement or whose designation as an Executive is revoked shall
receive payment of the Participant's Account balance in accordance with the
Participant's election on his Benefit Agreement, either in monthly payments over
three (3) years or as a lump sum distribution. If no election is indicated on
the Participant's Benefit Agreement for termination benefits, the Participant's
termination benefit shall be paid to him in monthly payments over three (3)
years beginning no later than one hundred twenty (120) days after termination of
employment or revocation of designation as an Executive. The termination benefit
selected by the Participant on his Benefit Agreement may be changed at any time
by the Participant by submitting a new termination election to the Committee,
but a change shall be effective only if it is received by the Committee at least
12 months before payments under the Plan commence. The amount of the monthly
payments shall be calculated to pay out over the three-year 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

                                       10

<PAGE>   15

balance. After receiving a termination benefit, neither the Participant, nor the
Participant's Beneficiary shall be entitled to any further benefit hereunder.

         5.03.      Disability. A Participant who has suffered a Disability
shall be deemed to be an Executive during such period and shall continue to be
eligible for Retirement Income Benefits under Section 5.01 without reduction and
Pre-Retirement and Post-Retirement Survivor Benefits under Sections 6.01 and
7.01. If the Disability occurs within a Deferral Period, and the disabled
Participant is determined by the Committee to be totally and permanently
disabled prior to the completion of the Deferral Period, the Committee shall
excuse him from making additional Deferrals under the applicable Benefit
Agreement, or shall reduce the amount of his required Deferrals, but no amounts
shall be credited to his Account with respect to such excused or reduced
Deferral(s). For all other Plan purposes, a Participant whose Deferrals have
been excused shall be deemed to have made all required Deferrals during his
Deferral Period.

         5.04.      Hardship Withdrawal Benefits. At any time prior to the
commencement of Retirement Income Benefits hereunder, a Participant may request
that the Committee make a distribution to him of all or part of his Account
balance within 120 days. Such distribution shall be made only if the Committee
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 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 be satisfied from (i) the Plan; (ii) the Supplemental Savings Plan; (iii)
the MCN Energy Group Long-Term Incentive Performance Share Plan; and (iv)
finally from the Savings Plan. After receiving a hardship distribution, neither
the Participant, nor his Beneficiary shall be entitled to any Pre-Retirement
Survivor Benefit hereunder unless the Participant completes two years of
participation after the hardship distribution, in which event the Pre-Retirement
Survivor Benefit shall be based solely on Deferrals after the hardship
distribution. If a Participant dies during the two years of participation after
the hardship distribution, the Pre-Retirement Survivor Benefit shall be computed
as provided in Section 6.01, except that the projection forward shall include
hypothetical annual Deferrals equal to zero.

                                       11

<PAGE>   16
                                   SECTION 6

                        PRE-RETIREMENT SURVIVOR BENEFITS

         6.01.      Pre-Retirement Survivor Benefit. Except as provided in
Sections 2.04, 5.04 and 6.02, if a Participant dies prior to his Retirement Date
while employed by the Company, his Beneficiary shall be entitled to receive an
amount equal to the present value, at the Participant's date of death, of the
Participant's Account balance projected forward to his Normal Retirement Date.
This projection forward will be accomplished by crediting to his Account balance
as of his date of death the amount of a hypothetical Deferral equal to the
average of the Participant's annual Deferrals for the five years immediately
preceding the Participant's death for the year of the Participant's death and
for all subsequent years through and including the year in which the
Participant's Normal Retirement Date falls and crediting interest on the Account
balance and any subsequent hypothetical Deferrals at the Plan Interest Rate in
effect on his date of death in order to arrive at the projected value of his
Account balance as of the Participant's Retirement Date. If the Participant did
not participate in the Plan for five years preceding the year of death, the
average will be computed based on a numerator equal to the total deferral
election in effect for the Deferral Period in which death occurred and a
denominator equal to five. This projected Account balance then will be converted
to its present value on the Participant's date of death using 70% of the
ten-year U.S. Treasury Note interest rate on the latest date such notes were
issued before the Participant's date of death. The pre-retirement survivor
benefit shall be paid in accordance with the Participant's selection in his
Benefit Agreement, either in monthly payments over a period not less than one
year and not more than 15 years, or as a lump sum distribution. The payment
option selected by the Participant on his Benefit Agreement may be changed at
any time by the Participant submitting a new payment selection to the Committee,
but a change shall be effective only if it is received by the Committee at least
12 months before payments under the Plan commence.

         Notwithstanding the foregoing, the Chairman of the Board of Directors
may, at the time of declaring the Executive eligible, designate an Executive to
be eligible only for Retirement Income Benefits and not the Pre-Retirement
Survivor Benefit. In the event of such a designation, the beneficiary of such an
Executive shall not receive any Pre-Retirement Survivor Benefit under this
Section.

                                       12

<PAGE>   17

         6.02       Proof of Insurability. If a new Participant is uninsurable,
or does not cooperate in the application for life insurance, such Participant's
Beneficiary shall not be entitled to receive a Pre-Retirement Survivor Benefit
under Section 6.01. The Beneficiary of such a Participant shall receive a
distribution of an amount equal to the Participant's Account balance as of the
Participant's date of death. Such distribution shall be paid in accordance with
the Participant's selection on his Benefit Agreement, either in monthly payments
over a period not less than one year and not more than 15 years, or as a lump
sum distribution.

         If a Participant, who was insurable at the time participation in the
Plan commenced, elects to increase his Deferral, such increase shall not be
reflected in computing the Pre-Retirement Survivor Benefit under Section 6.01 if
the Participant became uninsurable prior to electing the increased Deferral or
does not cooperate in the application for life insurance.

         6.03. Exclusion for Suicide or Self-Inflicted Injury. Notwithstanding
any other provision of the Plan, no Pre-Retirement Survivor Benefits in excess
of a Participant's Account balance as of his date of death shall be paid to any
Participant or Beneficiary in the event the Participant dies as the result of
suicide or self-inflicted injury within two years after January 1 of the first
year of participation.

                                    SECTION 7
                        POST-RETIREMENT SURVIVOR BENEFITS

         The Beneficiary of a Participant who dies after commencement of his
Retirement Income Benefit shall be entitled to continue to receive the
Retirement Income Benefit payments being made to the Participant under Section
5.01 for the remainder of the period over which benefits were being paid to the
deceased Participant.

                                       13

<PAGE>   18

                                    SECTION 8
                               VESTING OF BENEFITS

         A Participant shall be 100% vested in his benefits under the Plan at
all times except as set forth in Sections 5.02, 6.01, 6.02, 6.03, 9.02, 9.03,
11.02, 11.03 and 11.04. A Participant shall rank as an unsecured creditor of the
Company for all benefits under the Plan.

                                    SECTION 9
                    ADDITIONAL PROVISIONS AFFECTING BENEFITS

         9.01.      Benefit Agreement. The Committee shall provide to each
Executive a form of Benefit Agreement with respect to each Deferral Period for
which the Committee will permit the Executive to make Deferrals. The Benefit
Agreement shall set forth the Executive's acceptance of the benefits 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.

         9.02.      Leave of Absence. An Executive who is on Leave, with or
without salary, for a period of not more than one year, shall be deemed to be an
Executive employed by the Company during such Leave. An Executive who is on
Leave without salary for a period in excess of one year shall forfeit his
Pre-Retirement Survivor Benefit and shall not be entitled to any Pre-Retirement
Survivor Benefit hereunder unless the Participant completes five years of
participation after such leave in which event the Pre-Retirement Survivor
Benefit shall be based solely on Deferrals after the Leave.

         9.03.      Alternative Forms of Benefit. The Committee in its sole
discretion, at the written request of the recipient submitted to the Committee
no later than 12 months prior to the commencement of benefit distributions to
the recipient, may elect to pay the Participant, Spouse or Beneficiary an
actuarially equivalent lump-sum, annuity or other form of benefit that it deems
appropriate in lieu of the form of benefit otherwise provided in Sections 5, 6
or 7.

         9.04.      Tax Withholding. Benefit payments hereunder shall be subject
to applicable federal, state or local tax withholding laws.

                                       14

<PAGE>   19
                                   SECTION 10
                           ADMINISTRATION OF THE PLAN

         10.01. Duties and Power. The Committee shall be responsible for the
general administration of the Plan and the proper execution of its provisions.
It shall also be responsible for the interpretation of the Plan and the
determination of all questions arising thereunder. It shall maintain all
necessary books of accounts and records. It shall have power to establish,
interpret, enforce, amend, and revoke, from time to time, such rules and
regulations for the administration of the Plan and the conduct of its business
as it deems appropriate, including the right to remedy ambiguities,
inconsistencies and omissions (provided such rules and regulations are uniformly
applied to all persons similarly situated). Any action that the Committee is
required or authorized to take shall be final and binding upon each and every
person who is or may become a Plan Participant or Beneficiary. The Committee may
amend this Plan to comply with changes to the Code, so long as the amendment
does not materially increase the cost of maintaining the Plan or change benefits
to Participants or Beneficiaries.

         10.02. Benefit Statements. No later than 120 days after the end of each
Plan Year, the Committee will provide each Participant with a statement setting
forth the Participant's Account balance as of the last day of the immediately
preceding Plan Year.

                                   SECTION 11
                     AMENDMENT, SUSPENSION, AND TERMINATION

         11.01. Right to Amend or Terminate. The Plan may be amended or
terminated by the Board of Directors at any time. Such amendment or termination
may modify or eliminate any benefit hereunder except that such amendment or
termination shall not affect the rights of Participants or Beneficiaries to the
vested portion of a Participant's Account as of the date of such amendment or
termination.

         11.02. Right to Suspend. If the Board of Directors determines that
payments under the Plan would have a material adverse affect on the Company's
ability to carry on its business, the Board of Directors may suspend such
payments temporarily for such time as in its sole discretion it deems advisable,
but in no event for a period in excess of one year. The Company

                                       15

<PAGE>   20

shall pay such suspended payments in a lump sum immediately upon the expiration
of the period of suspension.

         11.03.     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 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.

         11.04.     Right to Accelerate. The Board of Directors 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.

                                   SECTION 12
                                  MISCELLANEOUS

         12.01.     Right to Continued Employment. Nothing in the Plan shall be
construed as giving any person employed by the Company the right to be retained
in the Company's employ. The Company expressly reserves the right to dismiss any
person at any time, with or without cause, without liability for the effect that
such dismissal might have upon him as a Participant in the Plan.

         12.02.     Prohibition Against Alienation. Except as otherwise provided
in the Plan, no right or benefit under the Plan shall be subject in any manner
to anticipation, alienation, sale, transfer, assignment, pledge, encumbrance, or
charge, and any attempt to so anticipate, alienate, sell, transfer, assign,
pledge, encumber, or charge the same shall be void. No such right or benefit
shall be liable for or subject to the debts, contracts, liabilities,
engagements, or torts of the person entitled to such right or benefit.

         12.03.     Sayings Clause. If any provision of this instrument shall be
finally held by a court of competent jurisdiction to be invalid or
unenforceable, the remaining provisions hereof shall continue to be fully
effective.

                                       16

<PAGE>   21

         12.04.     Payment of Benefit of Incompetent. In the event the
Committee finds that a Participant, former Participant, or Beneficiary is unable
to care for his affairs because of his minority, illness, accident, or other
reason, any benefits payable hereunder may, unless other claim has been made
therefor by a duly appointed guardian, committee or other legal representative,
be paid to a spouse, child, parent, or other blood relative or dependent or to
any person found by the Committee to have incurred expenses for the support and
maintenance of such Participant, former Participant, or Beneficiary; and any
such payments so made shall be a complete discharge of all liability therefor.

         12.05.     Spouse's Interest. The interest in the benefits hereunder of
a Spouse of a Participant who has predeceased the Participant shall
automatically pass to the Participant and shall not be transferable by such
Spouse in any manner including but not limited to such Spouse's will, nor shall
such interest pass under the laws of intestate succession.

         12.06.     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.

         12.07.     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.

         12.08.     Legal Fees and Expenses. The Company shall pay all legal
fees and expenses that 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 Section 5.04.

         12.09.     Choice of Law. This Plan shall be governed by and construed
in accordance with the laws of the State of Michigan to the extent not
superseded by applicable federal statutes or regulations.

         12.10.     Affiliated Employees. An affiliate of the Company may adopt
the Plan, with the consent of the Company, in order to become a participating
employer under the Plan. A participating employer may withdraw from the Plan by
filing a notice with the Committee.

                                       17

<PAGE>   22

Transfers of employment between participating employers and the Company or other
participating employers will be treated as continuous and uninterrupted service
under the Plan.

                                   SECTION 13
                          CHANGE IN CONTROL PROVISIONS

         13.01      General. In the event of a Change in Control, as defined in
Section 13.06, 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. For purposes of Section 13.06 only, the term
"Company" shall mean MCN Corporation, its successors and assigns.

         13.02      Transfer to Rabbi Trust. The Company 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. The Company 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.

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

         13.04      Joint and Several Liability. Upon and at all times after a
Change in Control, the liability under the Plan of the Company and each
Affiliated Employer that has adopted the Plan shall be joint and several so that
the Company 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.

         13.05      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 Beneficiary who has exhausted the claims and appeals procedures
set forth in Section 4.01 and 4.02 is denied in whole or in part, the following
additional procedures shall be applicable:

                                       18
<PAGE>   23

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

                    (b) The Company 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 the Company shall not be obligated
to advance to the claimant any amounts under this Section 13.04(b) unless and
until the claimant agrees in writing to repay to the Company, 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.

         13.06      Definition of Change in Control.  A "Change of Control"
means:
                    (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 the
Company (the "Outstanding Company Common Stock") or (ii) the combined voting
power of the then outstanding voting securities of the Company entitled to vote
generally in the election of directors (the "Outstanding Company Voting
Securities"); provided, however, that the following acquisition shall not
constitute a Change of Control: (A) any acquisition directly from the Company
(excluding an acquisition by virtue of the exercise of a conversion privilege),
(B) any acquisition by the Company, (C) any acquisition by any employee benefit
plan (or related trust) sponsored or maintained by the Company or any
corporation controlled by the Company 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 13.06 are satisfied; or

                    (b) Individuals who, as of the date hereof, constitute the
Board (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 the Company'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

                                       19

<PAGE>   24

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 the Company of a
reorganization,  merger or consolidation, in each case, unless, following such
reorganization, merger or 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 Company Common Stock and
Outstanding Company 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 Company Common Stock and Outstanding Company Voting Securities,
as the case may be, (ii) no Person (excluding the Company, any employee benefit
plan or related trust) of the Company 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 Company Common Stock or Outstanding
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 the Company of (i) a
complete liquidation or dissolution of the Company or (ii) the sale or other
disposition of all or substantially all of the assets of the Company, 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

                                       20

<PAGE>   25

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 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 Company Common Stock and Outstanding
Company 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 Company Common Stock and
Outstanding Company Voting Securities, as the case may be, (B) no Person
(excluding the Company and any employee benefit plan (or related trust) of the
Company or such corporation and any Person beneficially owning, immediately
prior to such sale or other disposition, directly or indirectly, 20% or more of
the Outstanding Company Common Stock or Outstanding Company 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 the Company.

         IN WITNESS WHEREOF, MCN Corporation has caused this Plan to be executed
as of this 15th day of December, 1999.

                                             MCN Energy Group Inc.

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

                                       21

<PAGE>   26

                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                             DEFERRAL ELECTION FORM

================================================================================
Employee Name                     | Social Security No.        | I.D. Number

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

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

In accordance with the terms of the MCN Energy Group Executive Deferred
     Compensation 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 2 of the Plan to defer a portion of my
     compensation as indicated below.

         Amount to be Deferred

         I designate the following amounts to be deferred under the terms of the
         Plan:

         $      .00   Annual Incentive Compensation (up to a maximum of 100% of
         ----------   the current year's target Annual Incentive Compensation
                      less the applicable FICA tax)

         $      .00   Annual Base Salary (a minimum required deferral of $3,000
         ----------   up to a maximum of 30% of Annual Base Salary in $1,000
                      increments, but in no event may Annual Base Salary be
                      reduced below the Social Security Wage Base)

         Payment Election

              That the amount deferred shall be 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 monthly installments over _____ years (in one
                     year increments, not to exceed 15 years)

         I understand that, in addition to the above payment, I may be eligible
         for a hardship withdrawal pursuant to Section 5 of the Plan.

         Termination Election

              That the amount deferred shall be paid to me after termination of
              my employment with the Company and its subsidiaries for any
              reason, other than retirement, disability or death, or after my
              designation as an Executive is revoked, in the manner specified
              below:

              ___  Lump-sum payment

              ___  Payment in monthly installments over 3 years.

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

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

================================================================================
Revised July 28, 1998

<PAGE>   27

                                MCN ENERGY GROUP

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                          BENEFICIARY DESIGNATION FORM

================================================================================
Employee Name                   | Social Security No.        | I.D. Number

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

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

   I HEREBY DESIGNATE, PURSUANT TO SUBSECTION 1.06 OF THE ABOVE-REFERENCED PLAN,
   THE BELOW DESIGNATED PERSON(S) AS MY BENEFICIARY IN THE EVENT OF MY DEATH:

--------------------------------------------------------------------------------
 BENEFICIARY'S NAME        | ADDRESS

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

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

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

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

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

   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 AWARD AMOUNTS DEFERRED BY ME AT ANY TIME.

--------------------------------------------------------------------------------
Employee Signature                                         | Date
--------------------------------------------------------------------------------
Receipt Acknowledged By                      | Title                    | Date

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

<PAGE>   28

                                       MCN

                      EXECUTIVE DEFERRED COMPENSATION PLAN

                              HISTORICAL BACKGROUND

01/01/90      MCN Corporation adopts Plan effective 01/01/90.

02/28/90      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved an amendment that provides for new definitions of "Cause"
              and "Change in Control" (Section 13).

05/06/92      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved new Section 1.29, "Social Security Wage Base", effective
              01/01/91; new Section 2.03, "Election of Deferral", effective
              01/01/92; and amended Section 2.09, "Interaction With Other
              Plans", effective 08/01/91; new sentence at the end of Section
              10.01 Administration of the Plan "Duties and Power" effective
              06/01/92.

08/15/92      Plan restated.

07/27/95      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved the Plan restatement to reflect the fact that not all
              participants [those employed by Genix] are participants in
              MichCon's Pension Plan. The Plan was amended to continue to cover
              employees of MCN who are not part of the Pension Plan.

02/22/96      MCN Corporation Minutes of Regular Meeting of Board of Directors
              approved the Plan restatement effective 1/1/96 to reflect the fact
              an election to defer a bonus amount must be stated in a flat
              dollar amount not to exceed the current year's target bonus. This
              change will enable the Plan Administrator to project the amount of
              the deferral with more certainty for purposes of purchasing
              insurance to fund the benefit that will ultimately be paid. The
              Plan was amended to permit a participant to elect out of the Plan
              after the first year of participation. Certain consequences were
              attached to such election to encourage continued participation.
              The Plan was amended to clarify that if a participant elects to
              increase the amount of an annual deferral, that subsequent
              deferrals may be reduced. However, such reduction may not reduce
              subsequent deferrals to an amount less than the amount of the
              original deferral. The Plan was amended to provide that the
              additional pension benefit and additional savings plan benefit
              will be credited to the participant's account balance. This will
              eliminate confusion as to when those benefits must be paid. The
              Plan was amended to provide participants with the option to elect
              to have termination benefits paid out over a three-year period or
              as a lump sum. If no election is made, termination benefits will
              be paid in monthly installments over three years beginning no
              later than 120 days after termination of employment. The Plan was
              amended to clarify the computation of the

<PAGE>   29

              pre-retirement survivor benefit. The Plan was amended to add a
              provision requiring proof of insurability. The Plan was amended to
              clarify that the change of control provisions relate to the change
              of control of MCN Corporation.

              These amendments are reflected in Section 1.01, "Account"; the
              addition of Sections 1.02, "Additional Pension Plan Benefit" ,
              1.03, "Additional Savings Plan Benefit", and 1.04, (Affiliated
              Employer"; the amendments to Sections 2.01, "Commencement of
              Participation" and 2.03, "Election of Deferral"; the deletion of
              Section 2.04, "Acceleration of Deferral"; the amendment of Section
              2.05, "Forgo Deferral for a Plan Year" and redesignation as
              Section 2.04; the deletion of Section 2.06, "Revocation of
              Deferral"; the amendment and redesignation of Section 2.07 to
              2.05, "Increased Deferral"; the amendment and redesignation of
              Section 2.08 to 2.06, "Establishment of Account"; the amendment
              and redesignation of Section 2.09 to 2.07, "Interaction with Other
              Plans"; amendments to Sections 5.02 "Termination Benefit", 5.04,
              "Hardship Withdrawal Benefits" and 6.01, "Pre-Retirement Survivor
              Benefit"; the addition of new Section 6.02, Proof of
              Insurability"; the redesignation of prior 6.02 to Section 6.03;
              and the amendment to Section 13.01, "General".

08/27/98      MCN Energy Group Inc. Minutes of Regular Meeting of Board of
              Directors approved the Plan amendment and restatement effective
              January 1, 1998, to reflect the change of the Company's name to
              MCN Energy Group Inc and the name of the plan to the MCN Energy
              Group Executive Deferred Compensation Plan.

              Section 1.12 was amended to change the name of the Committee from
              "the Savings Plan Committee under the MichCon Savings and Stock
              Ownership Plan" to the "MCN Energy Group Inc. Master Trust,
              Retirement and Savings Plan Committee."

              Section 2.01 is amended to add that an Executive may become a
              Participant no later than 30 days after he is designated an
              Executive.

              Section 2.06 is amended to revise the third sentence to read as
              shown. Prior to amendment, the sentence read as follows:

                  The Additional Pension Plan Benefit shall be credited to the
                  Participant's Account as of the date of the Participant's
                  retirement under the qualified plan or other termination of
                  employment.

              Section  2.07 was amended to read as shown.  Prior to amendment,
              Section  2.07  read as follows:

                  Interaction with Other Plans. The deferral of Annual Base
                  Salary (but not Annual Incentive Compensation) may result in a
                  reduction of a Participant's benefit under the Pension Plan
                  and the Savings Plan due to restrictions imposed by the IRS on

<PAGE>   30

                  qualified plans. In order to minimize the effect of this
                  reduction, a Participant's Account shall be credited with an
                  Additional Pension Benefit and an Additional Savings Plan
                  Benefit.

              This amendment was necessary due to the addition of bonuses to the
              definition of compensation for purposes of Retirement Plan and
              Savings Plan computations for Cash Balance Participants.

              Sections 5.01 and 6.01 were amended to eliminate the restriction
              on monthly payments of 5, 10, or 15 years and permit monthly
              payments over a period of any number of years from one to 15 and
              to permit a change in payment option if made at least 12 (as
              opposed to 36) months prior to the start of payments under the
              Plan.

              Section 6.02 was amended to reflect the availability of annual
              payments over a period of one to 15 years.

              Section 9.03 was amended to permit a change in payment option if
              made at least 12 (as opposed to 36) months prior to the start of
              payments under the Plan.

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:

              Section 1.01 was amended to add "transfers from the MCN Energy
              Group Mandatory Deferred Compensation Plan and MCN Energy Group
              Long-Term Incentive Plan" after "Additional Savings Plan Benefit."

              Section 2.06 is amended to add "transfers from the MCN Energy
              Group Mandatory Deferred Compensation Plan and MCN Energy Group
              Long-Term Incentive Plan shall be credited" before "and
              distributions shall be debited" in the first sentence.

              Sections 13.03, 13.04 and 13.05 were redesignated as Sections
              13.04, 13.05 and 13.06, respectively. A new Section 13.03, Lump
              Sum Payments, was added to read as shown.<PAGE>   1
                                                                    EXHIBIT 10.6

                                     MICHCON

                         SUPPLEMENTAL DEATH BENEFIT AND

                             RETIREMENT INCOME PLAN

                (AS AMENDED AND RESTATED EFFECTIVE APRIL 1, 1997)

<PAGE>   2

<TABLE>
<CAPTION>
                                TABLE OF CONTENTS

SECTION                                                                                                           PAGE
-------                                                                                                           ----
<S>                                                                                                               <C>
 ARTICLE 1 ......................................................................................................  1
      Title
 ARTICLE 2 ......................................................................................................  1
      Definitions
 ARTICLE 3 ......................................................................................................  6
      Purpose
 ARTICLE 4 ......................................................................................................  6
      Effective Date
 ARTICLE 5 ......................................................................................................  6
      Participation
 ARTICLE 6 ......................................................................................................  7
      Benefits
 ARTICLE 7 ...................................................................................................... 10
      Conditions for Benefits
 ARTICLE 8 ...................................................................................................... 12
      Unfunded Plan
 ARTICLE 9 ...................................................................................................... 13
      Assignment
 ARTICLE 10 ..................................................................................................... 13
      Administration
 ARTICLE 11 ..................................................................................................... 14
      Amendment, Suspension or Termination
 ARTICLE 12 ..................................................................................................... 14
      Legal Fees and Expenses
 ARTICLE 13 ..................................................................................................... 15
      No Employment Rights and Not a Contract to Continue in
           Office
</TABLE>

<PAGE>   3

                                     MICHCON

                         SUPPLEMENTAL DEATH BENEFIT AND

                             RETIREMENT INCOME PLAN

                      (as amended effective April 1, 1997)

                                   ARTICLE I

                                      TITLE

     The title of this plan shall be the "MichCon Supplemental Death Benefit and
Retirement Income Plan."

                                    ARTICLE 2

                                  DEFINITIONS

     The following words and phrases used herein shall have the following
respective meanings unless the context clearly requires otherwise:

     (1)  Board: The Board of Directors of MCN Energy Group Inc.

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

     (3)  Change of Control: Change of Control shall mean:

          (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 (1) the then outstanding shares of common stock of MCN
               Energy Group Inc. (the "Outstanding MCN Common Stock") or (ii)
               the combined voting power of the then outstanding voting
               securities of MCN Energy Group Inc. entitled to vote generally in
               the election of directors (the "Outstanding MCN Voting
               Securities"): provided,

<PAGE>   4

               however, that the following acquisitions shall not constitute a
               Change of Control: (i) any acquisition directly from MCN Energy
               Group Inc. (excluding an acquisition by virtue of the exercise of
               a conversion privilege), (ii) any acquisition by MCN Energy Group
               Inc., (iii) any acquisition by any employee benefit plan (or
               related trust) sponsored or maintained by MCN Energy Group Inc.
               or any corporation controlled by MCN Energy Group Inc. or (iv)
               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 2 are satisfied;
               or

          (b)  Individuals who, as of the date hereof, constitute the Board of
               Directors of MCN Energy Group Inc. (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 Energy Group Inc.'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 Energy Group Inc. of a
               reorganization, merger or consolidation, in each case, unless,
               following such reorganization, merger or consolidation, (1) more
               than 60% of, respectively, the then outstanding shares of common
               stock of the

<PAGE>   5

               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 is 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 Energy Group Inc., any employee benefit
               plan or related trust sponsored or maintained by MCN Energy Group
               Inc. or any corporation controlled by MCN Energy Group Inc. 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

<PAGE>   6

          (d)  Approval by the shareholders of MCN Energy Group Inc. of (i) a
               complete liquidation or dissolution of MCN Energy Group Inc. or
               (ii) the sale or other disposition of all or substantially all of
               the assets of MCN Energy Group Inc., 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 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 Energy Group Inc., any employee benefit
               plan or related trust sponsored or maintained by MCN Energy Group
               Inc. or any corporation controlled by MCN Energy Group Inc., 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% of 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

<PAGE>   7

               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
               Energy Group Inc.

     (4)  Committee: The Compensation Committee of the Board.

     (5)  Company: Michigan Consolidated Gas Company.

     (6)  Dependent Child: A natural born or legally adopted child, stepchild or
          foster child of an Employee, including children conceived at the date
          of death, which child is unmarried, is not in the armed forces of any
          country, has not attained the age of 21, and prior to the death of the
          Survivor was dependent upon such Survivor for his or her principal
          support and maintenance and, if a stepchild or foster child, resided
          in such Survivor's household. If, with respect to an Employee, there
          are more than four persons who qualify under the preceding sentence at
          anytime, only the four youngest such persons shall be treated as
          qualifying.

     (7)  Directors: Members of the Board who are not also employees of the
          Company or of a Subsidiary.

     (8)  Employees: Key salaried employees of the Company or a Subsidiary who
          are employed in an executive, administrative, or professional
          capacity.

     (9)  Final Annual Salary: The regular basic annual salary for an Employee
          before any payroll deductions, Section 401(k) contributions,
          non-qualified deferred compensation contributions, or cafeteria plan
          election, but excluding bonuses, awards and severance payments. This
          amount shall be determined at the time the employment of the Employee
          ceases as a result of retirement, termination or death.

     (10) Good Reason: Good Reason means (i) a significant change in the
          Employee's authority, duties, responsibilities or status within MCN
          from those which existed immediately prior to the Change in Control;
          (ii) a change (other than a bona fide promotion) in the Employee's
          title or office; (iii) a reduction in the Employee's compensation or
          benefits existing immediately prior to the Change in Control; (iv) a
          change in the Employee's assigned place of employment requiring
          physical relocation,

<PAGE>   8

          or a material change in the Employee's business travel obligations;
          (v) any similar significant change in the requirements,
          responsibilities or compensation of the Employee from the arrangements
          immediately prior to the Change in Control imposed by MCN without the
          express written consent of the Employee; or (vi) any other changes in
          working conditions that a reasonable man holding a similar position
          would find untenable.

     (11) MCN: MCN Energy Group Inc.

     (12) Plan: MichCon Supplemental Death Benefit and Retirement Income Plan.

     (13) Subsidiary: Any corporation in which the Company owns, directly or
          indirectly, stock possessing 50 percent or more of the total combined
          voting power of all classes of stock.

     (14) Survivor: The Employee or the Employee's spouse (if any) whose death
          occurs last.

                                   ARTICLE 3

                                     PURPOSE

     The purpose of the Plan is to improve the ability of the Company and its
Subsidiaries to attract and retain executives and directors.

                                    ARTICLE 4

                                 EFFECTIVE DATE

             The effective date of the Plan shall be June 22, 1988.

                                   ARTICLE 5

                                 PARTICIPATION

     Participation in the Plan is limited to Employees and Directors who are
recommended by the Committee and approved by the Board. No person shall have a
right to participate in the Plan without approval by the Board. Participation in
the Plan shall be evidenced by a written agreement

<PAGE>   9

executed between the Company and the Employee or Director. No person eligible
for benefits under this Plan as an Employee shall be eligible for benefits under
this Plan as a Director.

     No benefit shall be payable to or on behalf of any Director who dies or
retires on or after April 1, 1997.

                                    ARTICLE 6

                                    BENEFITS

A. Pre-Retirement Death Benefit

     Provided the conditions specified in Article 7, Section A are satisfied,
the Company will pay solely to the surviving spouse of an Employee who
participated in the Plan, a pre-retirement death benefit of 1/24th of the
Employee's Final Annual Salary during the month of the Employee's death and
monthly thereafter through and including the month the Employee would have
attained age 65, and thereafter, monthly payments of 1/60th of the Employee's
Final Annual Salary through and including the month in which the Employee would
have attained age 75. All such payments will be made only during the lifetime of
the Employee's surviving spouse and will cease upon the death of said spouse.
With respect to Directors, provided the conditions specified in Article 7,
Section A are satisfied, the Company will pay solely to the surviving spouse of
a Director who participated in the Plan, a pre-retirement death benefit of
$100,000 at the time of the Director's death. Payment will be made only to the
Director's surviving spouse and no payment will be made if there is no surviving
spouse.

B. Post-Retirement Benefit

     Provided the conditions specified in Article 7, Section B are satisfied,
the Company will pay to an Employee or Director who participated in the Plan, a
post-retirement benefit. An Employee who retires prior to age 62 and the
Employee's surviving spouse are not eligible (without approval of the Committee)
to begin receiving any post-retirement benefit until the date that the Employee
attains or would have attained age 62 had the Employee lived. A Director who
ceases to hold office as a Director prior to age 65 is not eligible (without
approval of the Committee) to receive any post-retirement benefit. If such
approval is

<PAGE>   10

obtained, post-retirement benefits will begin on the date the Director attains
or would have attained age 65 had the Director lived, unless otherwise approved
by the Committee.

     An Employee shall elect, at least 30 days prior to the Employee's
retirement (or at least 30 days prior to attaining age 62 if the second
paragraph of Article 7, Section D applies to the Employee), on a form approved
by the Committee, to receive a post-retirement benefit pursuant to any one of
the following options. A Director shall elect, at least 30 days prior to the
Director ceasing to hold office as a Director (or at least 30 days prior to
attaining age 65 if the third paragraph of Article 7, Section D applies to the
Director), on a form approved by the Committee, to receive a post-retirement
benefit pursuant to either Option A or C.

1.   Supplemental Retirement Benefit Options
     OPTION A. The Company will pay to an Employee, in equal monthly payments,
     20% of the Employee's Final Annual Salary each year for each of the first
     10 years following the Employee's retirement from the Company or a
     Subsidiary or following the Employee's attainment of age 62, whichever is
     later. With respect to Directors, the Company will pay to a Director, in
     equal monthly payments, $10,000 each year for each of the first 10 years
     following the Director's ceasing to hold office as a Director. Such
     payments will be made only to the Employee or Director, or in the event of
     the Employee's or Director's death, to the Employee's or Director's
     surviving spouse, and upon the death of the survivor thereof shall cease.

                                       OR

     OPTION B. The Company will pay to an Employee, in equal monthly payments,
     15% of the Employee's Final Annual Salary each year for each of the first
     15 years following the Employee's retirement from the Company or a
     Subsidiary or following the Employee's attainment of age 62, whichever is
     later. Such payments will be made only to the Employee, or in the event of
     the Employee's death, to the Employee's surviving spouse, and upon the
     death of the survivor thereof shall cease.

                                       OR

2.   Post-Retirement Death Benefit Option

<PAGE>   11

     OPTION C. The Company will pay solely to an Employee's surviving spouse,
     the sum of 332% of the Employee's Final Annual Salary upon the later of
     the Employee's death or the date the Employee would have attained age 62
     had the Employee lived. With respect to Directors, the Company will pay
     solely to the Director's surviving spouse, the sum of $100,000 upon the
     death of a Director if the death occurs after the Director ceased to hold
     office as a Director. No payment will be made if there is no surviving
     spouse.

                                       OR

     OPTION D. The Company will pay solely to an Employee's surviving spouse, in
     equal monthly payments, 42% of the Employee's Final Annual Salary each year
     for each of the first 10 years following the later of the Employee's death
     or the date the Employee would have attained age 62 had the Employee lived.
     Such payments will be made only during the lifetime of the Employee's
     surviving spouse and will cease upon the death of said spouse.

                                       OR

     OPTION E. The Company will pay solely to an Employee's surviving spouse, in
     equal monthly payments, 32% of the Employee's Final Annual Salary each year
     for each of the first 15 years following the later of the Employee's death
     or the date the Employee would have attained age 62 had the Employee lived.
     Such payments will be made only during the lifetime of the Employee's
     surviving spouse and will cease upon the death of said spouse.

C.   Dependent Child Benefit

     Provided the conditions specified in Article 7, Section C are satisfied,
the Company will pay to a Dependent Child of an Employee who participated in the
Plan, a dependent child benefit of 1/96th of the Employee's Final Annual Salary
during the month of the Survivor's death and monthly thereafter through and
including the month the Dependent Child attains age 21. All such payments are
limited to persons who qualify as a Dependent Child and no other person shall
receive any dependent child benefit.

<PAGE>   12

D.   Assumption of Liability for Benefits

     The Company will assume Primark Corporation's obligations with respect to
each person who was covered by the Primark Corporation Supplemental Death
Benefit and Retirement Income Plan and who is a Director or Employee of the
Company immediately after the effective date of the spin-off of the Company from
Primark Corporation except for the obligation to the person who, immediately
before the spin-off, was the Chief Executive Officer of Primark Corporation.

                                    ARTICLE 7

                        CONDITIONS FOR BENEFITS BENEFITS

A. Pre-Retirement Death Benefit

     Subject to the following conditions, the pre-retirement death benefit
provided in Article 6, Section A shall be paid to an Employee's or Director's
surviving spouse.

CONDITIONS

     1.   The Employee shall have been in the continuous employ of the Company
          or a Subsidiary from the date of participation in the Plan until the
          time of the Employee's death. With respect to Directors, the Director
          shall have served continuously on the Board from the date of
          participation in the Plan until the time of the Director's death; and

     2.   The Employee shall have died while in the employ of the Company or a
          Subsidiary and prior to the Employee's actual retirement from the
          Company or a Subsidiary. With respect to Directors, the Director shall
          have died while holding office.

B.   Post-Retirement Benefit

     Subject to the following conditions, the post-retirement death benefit
provided in Article 6, Section B1 or B2 shall be paid to an Employee or Director
or the respective surviving Spouse.

<PAGE>   13

     CONDITIONS

     1.   The Employee shall have been in the continuous employ of the Company
          or a Subsidiary from the date of participation in the Plan until the
          time of the Employee's retirement. With respect to Directors, the
          Director shall have served continuously on the Board from the date of
          participation in the Plan until the Director attains age 65, unless
          otherwise approved by the Committee; and

     2.   The Employee shall have retired from the Company or a Subsidiary in
          accordance with the terms of the MichCon Retirement Plan. With respect
          to Directors, the Director shall have ceased to hold office as a
          Director, otherwise than by death.

C.   Dependent Child Benefit

     Subject to the following conditions, the dependent child benefit provided
in Article 6, Section C shall be paid to any person who qualifies as a Dependent
Child.

     CONDITIONS

     1.   The Employee shall have been in the continuous employ of the Company
          or a Subsidiary from the date of participation in the Plan until the
          time of the Employee's death; and

     2.   The Employee shall have died while in the employ of the Company or a
          Subsidiary and prior to the Employee's actual retirement from the
          Company or a Subsidiary; and

     3.   The Employee's spouse (if any) shall have died; and

     4.   A Dependent Child survives.

D.   Continued Services Required

     Except as provided in this Section, all rights to benefits under this Plan
shall terminate upon termination of the Employee's employment with the Company
or a Subsidiary for any reason other than the Employee's death or retirement in
accordance with the terms of the MichCon Retirement Plan. With respect to
Directors, except as provided in this Section, all rights to benefits under this
Plan shall terminate if the Director ceases to hold office as a Director before
the Director attains age 65, unless otherwise approved by the Committee.

<PAGE>   14

     Notwithstanding any other provision of this Plan, if (1) a Change in
Control occurs, (2) the Employee was either admitted to participation in the
Plan on or before July 1, 1988, or the Change in Control occurs more than 12
months (or such shorter period as approved by the Committee) after the Employee
was admitted to participation in the Plan, and (3) within 60 months after the
Change in Control occurs, the employment of the Employee is terminated (i) by
the Company other than for Cause or (ii) by the Employee for Good Reason, then
all rights to benefits under this Plan shall continue as if such termination of
employment had not occurred. A pre-retirement death benefit shall be available
if such person dies prior to attaining age 62, and a post-retirement benefit
shall be available when such person attains age 62.

     Notwithstanding any other provision of this Plan, if (1) a Change in
Control occurs, (2) the Director was either admitted to participation in the
Plan on or before July 1, 1988, or the Change in Control occurs more than 12
months (or such shorter period as approved by the Committee) after the Director
was admitted to participation in the Plan, and (3) as part of or within 60
months after the Change in Control, the Director ceases to hold office otherwise
than (i) removal by the shareholders for Cause, or (ii) resignation by the
Director, then all rights to benefits shall continue as if the Director had
continued to hold office. A pre-retirement death benefit shall be available if
such Director dies prior to attaining age 65, and a post-retirement benefit
shall be available when such Director attains age 65.

     Notwithstanding any other provision of this Plan, if an Employee is
admitted to participation in the Plan, and has reached age 55, and thereafter,
the employment of the Employee is terminated prior to retirement other than for
Cause, then all rights to benefits under this Plan accrued as of the later of
December 31, 1993 or on December 31 of the year the employee reaches age 55
shall continue as if such termination of employment had not occurred. A
pre-retirement death benefit shall be available if such person dies prior to
attaining age 62, and a post-retirement benefit shall be available when such
person attains age 62.

<PAGE>   15
                                   ARTICLE 8

                                 UNFUNDED PLAN

     This Plan shall not be a funded plan. Any insurance Policy or other asset
acquired or held by the Company in connection with this Plan shall not be deemed
to be held by the Company in trust for any person, or to be security for the
performance of any obligations of the Company, but shall be and remain a general
asset of the Company. No person shall have any property interest in any specific
assets of the Company. Any rights acquired pursuant to the Plan shall be those
of an unsecured creditor. The obligation to make payments under this Plan shall
be and remain an unsecured, unfunded general obligation of the Company.

                                    ARTICLE 9

                                   ASSIGNMENT

     No benefit hereunder of any person is assignable or transferable to any
other person nor may such be sold, assigned, conveyed, or otherwise transferred
or hypothecated.

                                   ARTICLE 10

                                 ADMINISTRATION

     This Plan shall be administered by the Committee. The Committee shall have
full authority and responsibility to interpret and administer the terms of the
Plan and may adopt rules and regulations governing the administration of the
Plan.

     The Committee shall be responsible for making recommendations to the Board
with respect to Employees and Directors who are to participate in the Plan. In
discharging this responsibility, the Committee may consult with individual
members of the Board, with the management of the Company or with such other
persons as the Committee may deem appropriate.

     The Board shall determine which Employees and Directors shall participate
in the Plan, based upon the recommendations of the Committee, and the Board's
own consideration of who should participate in the Plan.

<PAGE>   16
     The Committee, in its absolute discretion, may cause benefit payments to
an Employee to commence prior to the Employee attaining age 62 if it deems such
action appropriate to the circumstances.

     The Committee, in its absolute discretion, may provide benefits to a
Director even if the Director fails to hold office until the Director attains
age 65 and may cause benefit payments to such Director to commence prior to the
Director attaining age 65 if it deems such action appropriate to the
circumstances.

     The Committee, in its absolute discretion, may provide benefits to an
Employee or Director even if such person was admitted to participation in the
Plan or the Primark Corporation Supplemental Death Benefit and Retirement Income
Plan within 12 months of a Change in Control.

     Any member of the Committee or of the Board who is being considered for
eligibility or who would be affected by a matter being considered shall not vote
or act on such matter.

                                   ARTICLE 11

                      AMENDMENT, SUSPENSION OR TERMINATION

     MCN's Board of Directors may at any time amend, suspend or terminate the
Plan, or any part thereof, for any purpose; provided, however, that no such
amendment, suspension or termination shall affect any agreement between an
Employee or Director and MCN without the written consent of the Employee or
Director.

                                   ARTICLE 12

                            Legal Fees and Expenses

     MCN shall pay all legal fees and expenses that an Employee or Director
admitted to participation in the Plan, or such Employee's or Director's spouse
or Dependent Child may incur as a result of MCN contesting the validity,
enforceability, or any such person's interpretation of, or determinations under
this Plan; provided, however, MCN shall not be required to pay any fees or
expenses of any such person unsuccessfully seeking to obtain benefits following
a Change in Control based upon termination of employment or removal from Office
for Cause.

<PAGE>   17

                                   ARTICLE 13

                            No Employment Rights and
                      Not a Contract to Continue in Office

     Nothing contained in the Plan and no actions taken pursuant to the
provisions of the Plan shall be construed as a contract of employment between
the Company or a Subsidiary and an Employee, or as a right of any Employee to be
continued in the employment of the Company or a Subsidiary, or as a limitation
of the right of the Company or a Subsidiary to discharge any Employee at any
time, with or without cause, or as a limitation of the right of the Employee to
terminate employment at any time.

     Nothing contained in the Plan and no actions taken pursuant to the
provisions of the Plan shall be construed as a contract for services between the
Company and a Director, or as a right of a Director to continue to serve as a
director, or as a limitation of the right of shareholders to remove a Director
from office, with or without cause, or as a limitation of the right of the
Director to resign from office.

     IN WITNESS WHEREOF, the undersigned officer of the Company has executed
this Plan as of this 1st day of April, 1997.

                                   MICHIGAN CONSOLIDATED GAS COMPANY

                                   By: /s/ Stephen E. Ewing
                                      ------------------------------
                                        Stephen E. Ewing,
                                        President and Chief Executive
                                        Officer

Restated April 1, 1997

<PAGE>   18

                              MCN ENERGY GROUP INC.

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                                    EMPLOYEE

     THIS AGREEMENT is made this        day of)      ,            , between MCN
Energy Group Inc., a Michigan Corporation, (the "Corporation") and          , an
employee of the Corporation (the "Employee").

                                   WITNESSETH

     WHEREAS, the Employee has agreed to serve as an officer of the Corporation
and the Corporation desires to encourage the Employee to continue to perform his
or her duties in a capable and efficient manner.

     NOW, THEREFORE, in consideration of the foregoing and the benefits to be
derived hereunder, the Corporation and Employee agree as follows:
     The Employee shall receive the benefits of an Employee under the MichCon
Supplemental Death Benefit and Retirement Income Plan ("Plan") as in effect on
this date subject to all the terms and conditions as specified in the Plan. The
Plan and all its provisions are hereby incorporated by reference. The benefits
under this Agreement are in lieu of those otherwise payable by MichCon.

<PAGE>   19

IN WITNESS WHEREOF, the undersigned officer of the Corporation has executed this
agreement an behalf of the Corporation and the Employee has executed this
agreement on the date first above written:

                                    MCN ENERGY GROUP INC.

                                    By:
                                       -----------------------------------

                                    Its: Secretary
                                        ----------------------------------

                                    EMPLOYEE

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

<PAGE>   20

                              MCN ENERGY GROUP INC.

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                              OPTION ELECTION FORM

                                    EMPLOYEE

Name                                               Soc. Sec. No.
Retirement Date                                    I. D. No.
Name of Spouse                                     Soc. Sec. No.

I hereby elect to receive the following post-retirement benefit under my
Supplemental Death Benefit and Retirement Agreement with MCN Energy Group Inc.
which is subject to all the terms and conditions specified in the MichCon
Supplemental Death Benefit and Retirement Income Plan ("Plan"). The Plan and all
its provisions are hereby incorporated by reference.

                              Option A

                              Option B

                              Option C

                              Option D

                              Option E

I understand that once having retired, I may not change this election.

---------------------------                -----------------------------------
  Date                                     Employee

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

<PAGE>   21

                             MCN ENERGY GROUP INC.

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                                    DIRECTOR

     THIS AGREEMENT is made this     day of        , 19     , between MCN Energy
Group Inc., a Michigan Corporation, (the "Corporation") and                   ,
a non-employee director of the Corporation (the "Director").

                                   WITNESSETH

     WHEREAS, the Director has agreed to serve On the Board of Directors of the
Corporation and the Corporation desires to encourage the Director to continue to
perform his or her duties in a capable and efficient manner.

     NOW, THEREFORE, in consideration of the foregoing and the benefits to be
derived hereunder, the Corporation and Director agree as follows:

     The Director shall receive the benefits of a Director under the MichCon
Supplemental Death Benefit and Retirement Income Plan ("Plan") as in effect as
of January 4, 1989 subject to all the terms and conditions as specified in the
Plan. The Plan and all its provisions are hereby

<PAGE>   22

incorporated by reference. The benefits under this Agreement are in lieu of
those otherwise payable by MichCon.

     IN WITNESS WHEREOF, the undersigned officer of the Corporation has executed
this agreement on behalf of the Corporation and the Director has executed this
agreement on the date first above written:

                                        MCN ENERGY GROUP INC.

                                        By:
                                           --------------------------

                                        Its: Secretary
                                             ------------------------

                                        DIRECTOR

                                        -----------------------------
                                        Director

<PAGE>   23

                              MCN ENERGY GROUP INC.

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                              OPTION ELECTION FORM

                                    DIRECTOR

Name                                              Soc. Sec. No.
Last Date to Hold Office
Name of Spouse                                    Soc. Sec. No.

I hereby elect to receive the following post-retirement benefit under the
MichCon Supplemental Death Benefit and Retirement Income Plan ("Plan"), subject
to all the terms and conditions specified in the Plan. The Plan and all its
provisions are hereby incorporated by reference.

                                    Option A

                                    Option C

I understand that once having ceased to serve on the Board of Directors of MCN
Energy Group Inc., I may not change this election.

------------------------------            ----------------------------------
   Date                                        Director

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

<PAGE>   24

                        MICHIGAN CONSOLIDATED GAS COMPANY

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                                    EMPLOYEE

     THIS AGREEMENT is made this      day of                19  , between
Michigan Consolidated Gas Company, a Michigan Corporation, (the "Company") and
                  , an employee of the Company (the "Employee").

                                   WITNESSETH

     WHEREAS, the Employee has agreed to serve as an officer of the Company and
the Company desires to encourage the Employee to continue to perform his or her
duties in a capable and efficient manner.

     NOW, THEREFORE, in consideration of the foregoing and the benefits to be
derived hereunder, the Company and Employee agree as follows:
     The Employee shall receive the benefits of an Employee under the MichCon
Supplemental Death Benefit and Retirement Income Plan ("Plan") as in effect on
this date subject to all the terms and conditions as specified in the Plan.

<PAGE>   25

     IN WITNESS WHEREOF, the undersigned officer of the Company has executed
this agreement on behalf of the Company and the employee has executed this
agreement on the date first above written:

                                  MICHIGAN CONSOLIDATED GAS COMPANY

                                  By:
                                     --------------------------------
                                          Stephen E. Ewing

                                  Its: President and Chief Executive
                                          Officer

                                  EMPLOYEE

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

<PAGE>   26

                        MICHIGAN CONSOLIDATED GAS COMPANY

                         SUPPLEMENTAL DEATH BENEFIT AND

                           RETIREMENT INCOME AGREEMENT

                              OPTION ELECTION FORM

                                    EMPLOYEE

Name                                     Soc. Sec. No.
Retirement Date                          I. D. No.
Name of Spouse                           Soc. Sec. No.

I hereby elect to receive the following post-retirement benefit under my
Supplemental Death Benefit and Retirement Agreement with the Company which is
subject to all the terms and conditions specified in the MichCon Supplemental
Death Benefit and Retirement Income Plan ("Plan"). The Plan and all its
provisions are hereby incorporated by reference.

                                    Option A

                                    Option B

                                    Option C

                                    Option D

                                    Option E

I understand that once having retired, I may not change this election.

-------------------------------              -----------------------------------
     Date                                    Employee

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

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