The document provides financial information for DTE Energy Company and its subsidiaries for the fourth quarter and full year of 2005. It includes statements of operating income, financial position, cash flows, and debt to equity calculations. For the quarter, DTE Energy reported net income of $378 million compared to $151 million in the prior year. For the full year, net income was $577 million compared to $445 million in 2004. Total assets as of December 31, 2005 were $23.36 billion with total debt of $6.6 billion and shareholders' equity of $5.55 billion.

1. Q4 2005
Supplemental
Financial
Information
February 15, 2006
1

2. DTE Energy Company
Historical Operating Net Income
(Preliminary/Unaudited)
(in $ millions, except per share amounts)
2004 2005
Q1 Q2 Q3 Q4 Total Q1 Q2 Q3 Q4 Total
Electric Utility $38 $10 $62 $67 $177 $56 $46 $97 $73 $272
Gas Utility 57 (28) (31) 27 25 48 (2) (18) 45 73
Total Utilities $95 ($18) $31 $94 $202 $104 $44 $79 $118 $345
Power & Industrial Projects
Synfuels $41 $54 $51 $47 $193 $65 $18 $47 $143 $273
Power Generation (4) (4) (6) (3) (17) (4) (3) (1) (4) (12)
All Other Projects 1 6 6 (1) 12 5 8 3 7 23
Corporate Overheads (2) (3) (2) (2) (9) 1 (3) (2) (1) (5)
Total Power & Industrial Projects $36 $53 $49 $41 $179 $67 $20 $47 $145 $279
Fuel Transportation & Marketing
Coal Services $3 $5 $5 $7 $20 $5 $6 $5 $6 $22
Midstream 3 4 4 6 17 8 5 9 7 29
Energy Trading 9 (7) 12 30 44 (22) (7) (140) 130 (39)
Corporate Overheads (3) (2) (3) (3) (11) (1) (4) (3) (2) (10)
Total Fuel Transportation & Marketing $12 $0 $18 $40 $70 ($10) $0 ($129) $141 $2
Unconventional Gas Production $1 $2 $2 $1 $6 $1 $0 $2 $1 $4
Corporate & Other ($7) $23 ($3) ($25) ($12) ($8) ($24) $6 ($27) ($53)
Total Net Income $137 $60 $97 $151 $445 $154 $40 $5 $378 $577
Earnings Per Diluted Share $0.80 $0.35 $0.56 $0.86 $2.57 $0.88 $0.23 $0.03 $2.12 $3.27
Average Diluted Shares Outstanding 170 174 174 175 173 175 175 177 178 176
2

3. DTE ENERGY COMPANY
CONSOLIDATED STATEMENT OF FINANCIAL POSITION (PRELIMINARY/UNAUDITED)
December 31
2004
2005
(in Millions)
ASSETS
Current Assets
Cash and cash equivalents ..................................................................................... $ $ 56
88
Restricted cash ....................................................................................................... 126
122
Accounts receivable
Customer (less allowance for doubtful accounts of $136 and $129, respectively) 1,288 880
Accrued unbilled revenues................................................................................... 378
458
Other .................................................................................................................... 383
835
Inventories
Fuel and gas ......................................................................................................... 509
522
Materials and supplies ......................................................................................... 159
146
Deferred income taxes ........................................................................................... 94
257
Assets from risk management and trading activities.............................................. 296
814
Other ...................................................................................................................... 115
160
2,996
4,690
Investments
Nuclear decommissioning trust funds 590
646
Other ...................................................................................................................... 558
530
1,148
1,176
Property
Property, plant and equipment ............................................................................... 18,011
18,660
Less accumulated depreciation and depletion ....................................................... (7,520 )
(7,830 )
10,491
10,830
Other Assets
Goodwill ................................................................................................................ 2,067
2,057
Regulatory assets .................................................................................................. 2,119
2,074
Securitized regulatory assets.................................................................................. 1,438
1,340
Notes receivable..................................................................................................... 529
409
Assets from risk management and trading activities.............................................. 125
333
Prepaid pension assets ........................................................................................... 184
186
Other ...................................................................................................................... 200
265
6,662
6,664
$ 21,297
Total Assets ............................................................................................................. $ 23,360
3

4. DTE ENERGY COMPANY
CONSOLIDATED STATEMENT OF FINANCIAL POSITION (PRELIMINARY/UNAUDITED)
December 31
2004
2005
(in Millions, Except Shares)
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Accounts payable ............................................................................................. $ $ 892
1,187
Accrued interest................................................................................................ 111
115
Dividends payable ............................................................................................ 90
92
Accrued payroll ................................................................................................ 33
34
Income taxes..................................................................................................... 16
-
Short-term borrowings...................................................................................... 403
943
Current portion of long-term debt, including capital leases ............................. 514
691
Liabilities from risk management and trading activities................................... 369
1,091
Other................................................................................................................. 581
769
3,009
4,922
Other Liabilities
Deferred income taxes...................................................................................... 1,124
1,396
Regulatory liabilities ........................................................................................ 817
715
Asset retirement obligations ............................................................................. 916
1,091
Unamortized investment tax credit................................................................... 143
131
Liabilities from risk management and trading activities................................... 224
550
Liabilities from transportation and storage contracts ....................................... 387
317
Accrued pension liability.................................................................................. 265
284
Deferred gains from asset sales ........................................................................ 414
188
Minority interest ............................................................................................... 132
92
Nuclear decommissioning ................................................................................ 77
85
Other................................................................................................................. 635
740
5,134
5,589
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other...................................................................... 5,673
5,234
Securitization bonds ......................................................................................... 1,400
1,295
Equity-linked securities .................................................................................... 178
175
Trust preferred-linked securities....................................................................... 289
289
Capital lease obligations................................................................................... 66
87
7,606
7,080
Commitments and Contingencies
Shareholders’ Equity
Common stock, without par value, 400,000,000 shares
authorized, 177,814,429 and 174,209,034 shares issued
and outstanding, respectively ......................................................................... 3,323
3,483
Retained earnings ............................................................................................. 2,383
2,557
Accumulated other comprehensive loss ........................................................... (158 )
(271 )
5,548
5,769
$ 21,297
Total Liabilities and Shareholders’ Equity ..................................................... $ 23,360
4

5. DTE ENERGY COMPANY
CONSOLIDATED STATEMENT OF CASH FLOWS (PRELIMINARY/UNAUDITED)
Year Ended December 31
2004
2005
(in Millions)
Operating Activities
Net Income ..................................................................................................... $ 431
$ 537
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization .................................................. 744
872
Deferred income taxes ............................................................................... 129
147
Gain on sale of interests in synfuel projects .............................................. (219 )
(367 )
Gain on sale of ITC and other assets, net................................................... (17 )
(38 )
Partners’ share of synfuel project losses.................................................... (223 )
(318 )
Restructuring charges ................................................................................ -
33
Contributions from synfuel partners .......................................................... 141
243
Cumulative effect of accounting changes.................................................. -
3
Changes in assets and liabilities, exclusive of changes
shown separately .................................................................................... 9
(111 )
Net cash from operating activities .................................................................. 995
1,001
Investing Activities
Plant and equipment expenditures – utility..................................................... (815 )
(850 )
Plant and equipment expenditures – non-utility ............................................. (89 )
(215 )
Acquisitions, net of cash acquired ................................................................. -
(50 )
Proceeds from sale of interests in synfuel projects......................................... 221
349
Proceeds from sale of ITC and other assets, net of cash divested .................. 104
60
Restricted cash for debt redemptions.............................................................. 5
4
Other investments........................................................................................... (107 )
(100 )
Net cash used for investing activities ............................................................. (681 )
(802 )
Financing Activities
Issuance of long-term debt ............................................................................. 736
869
Redemption of long-term debt........................................................................ (759 )
(1,266 )
Short-term borrowings, net ............................................................................. 33
437
Issuance of common stock.............................................................................. 41
172
Repurchase of common stock......................................................................... -
(13 )
Dividends on common stock .......................................................................... (354 )
(360 )
Other............................................................................................................... (9 )
(6 )
Net cash used for financing activities ............................................................. (312 )
(167 )
2
Net Increase in Cash and Cash Equivalents................................................. 32
54
Cash and Cash Equivalents at Beginning of the Period............................... 56
$ 56
Cash and Cash Equivalents at End of the Period ......................................... $ 88
5

6. THE DETROIT EDISON COMPANY
CONSOLIDATED STATEMENT OF OPERATIONS (PRELIMINARY/UNAUDITED)
Year Ended December 31
(in Millions) 2004
2005
$ 3,568
Operating Revenues ...................................................... $ 4,462
Operating Expenses
Fuel and purchased power ............................................ 885
1,590
Operation and maintenance .......................................... 1,395
1,308
Depreciation and amortization ..................................... 523
640
Taxes other than income............................................... 249
241
Asset (gains) and losses, net......................................... (26 ) (1 )
3,051
3,753
517
Operating Income ......................................................... 709
Other (Income) and Deductions
Interest expense ............................................................ 280
267
Interest income ............................................................. -
(3 )
Other income ................................................................ (34 )
(27 )
Other expenses ............................................................. 57
46
303
283
214
Income Before Income Taxes ....................................... 426
64
Income Tax Provision ................................................... 149
150
Income Before Accounting Change.............................. 277
(3 ) -
Cumulative Effect of Accounting Change ...................
150
Reported Earnings ........................................................ 274
Cumulative Effect of Accounting Change
Conditional Retirement Obligations (FIN 47) ............. -
3
Adjustments
Stranded Cost adjustment ............................................. 21
-
Incremental non-recurring DTE2 project costs ............ 7
8
Gain on sale of assets ................................................... (17 ) -
Performance Excellence Process – cost to achieve ...... -
4
$ 178
Operating Earnings ...................................................... $ 272
The Consolidated Statement of Operations (Unaudited) should be read in conjunction with the Notes to
Consolidated Financial Statements appearing in the Annual Report to Shareholders, Form 10K and 10Q.
6

7. MICHIGAN CONSOLIDATED GAS COMPANY
CONSOLIDATED STATEMENT OF OPERATIONS (PRELIMINARY/UNAUDITED)
Year Ended December 31
(in Millions) 2004
2005
$ 1,645
Operating Revenues .................................................... $ 2,098
Operating Expenses
Cost of gas .................................................................. 1,048
1,455
Operation and maintenance ........................................ 387
411
Depreciation, depletion and amortization ................... 108
97
Taxes other than income............................................. 48
42
Asset (gains) and losses, net ....................................... (2)
48
1,589
2,053
Operating Income (Loss) ............................................ 56
45
Other (Income) and Deductions
Interest expense .......................................................... 57
57
Interest income ........................................................... (9)
(10)
Other income .............................................................. (5)
(4)
Other expenses............................................................ 3
3
46
46
10
Income (Loss) Before Income Taxes .......................... 1
(9)
Income Tax Provision (Benefit).................................. (14)
19
Reported Earnings....................................................... 13
Adjustments
April 2005 MPSC gas orders....................................... -
57
Incremental non-recurring DTE2 project costs ........... 4
5
Performance Excellence Process – cost to achieve...... -
1
$ 23
Operating Earnings ..................................................... $ 76
Consolidated Statement of Operations (Unaudited) should be read in conjunction with the Notes to
Consolidated Financial Statements appearing in the Annual Report to Shareholders, Form 10K and 10Q.
7

8. DTE Energy Debt/Equity Calculation
As of December 31, 2005
($ millions)
Short-term borrowings 943
Current portion long-term debt, including capital leases 691
Mortgage bonds, notes and other 5,234
Securitization bonds 1,295
Capital lease obligations 87
Equity-linked securities 175
less MichCon short-term debt (424)
less Securitization bonds, including current portion (1,399)
Total debt 6,602
Trust preferred-linked securities 289
Total preferred/ other 289
Equity 5,769
Total capitalization 12,660
Debt 52.1%
Preferred 2.3%
Common shareholders' equity 45.6%
Total 100.0%
8

9. Sales Analysis - Q4 2005
Electric Sales - Detroit Edison Service Area (GWh) Electric Revenue - Detroit Edison Service Area ($000s)
Q4 2005 Q4 2004 Q4 2005 Q4 2004
% Change % Change
Residential 3,440 3,426 0% Residential 308,365 305,966 1%
Commercial 3,972 3,328 19% Commercial 342,036 281,008 22%
Industrial 3,199 3,054 5% Industrial 188,232 150,646 25%
Other 716 648 10% Other 32,467 27,871 16%
11,327 10,456 8% 871,100 765,491 14%
Interconnection Interconnection
1,246 2,274 -45% 84,921 84,797 0%
Choice* Choice*
1,671 2,563 -35% 32,705 48,734 -33%
TOTAL SALES 14,244 15,293 -7% TOTAL REVENUES 988,726 899,022 10%
* Includes Dearborn Industrial Group sales * Distribution charge, includes Dearborn Industrial Group revenues
Gas Sales - MichCon Service Area (Mcf) Gas Revenue - MichCon Service Area ($000s)
Q4 2005 Q4 2004 Q4 2005 Q4 2004
% Change % Change
Residential 38,269,239 39,621,965 -3% Residential 522,906 348,149 50%
Commercial 11,823,294 12,070,676 -2% Commercial 161,790 106,907 51%
Industrial 451,373 335,373 35% Industrial 5,879 2,919 101%
50,543,906 52,028,014 -3% 690,575 457,975 51%
End User End User
Transportation* Transportation*
40,332,976 38,386,908 5% 36,336 30,499 19%
TOTAL SALES 90,876,882 90,414,922 1% TOTAL REVENUES 726,911 488,474 49%
* Includes choice customers * Includes choice customers
Weather
Cooling Degree Days Heating Degree Days
Detroit Edison service territory MichCon service territory
Q4 2005 Q4 2004 Q4 2005 Q4 2004
% Change % Change
Actuals 33 1 3200% Actuals 2,272 2,216 3%
Normal 6 6 Normal 2,352 2,352
450% -83% -3% -6%
Deviation from normal Deviation from normal
9

10. Sales Analysis - 2005
Electric Sales - Detroit Edison Service Area (GWh) Electric Revenue - Detroit Edison Service Area ($000s)
2005 2004 2005 2004
% Change % Change
Residential 16,812 15,082 11% Residential 1,516,645 1,344,761 13%
Commercial 15,618 13,425 16% Commercial 1,330,823 1,122,902 19%
Industrial 12,317 11,472 7% Industrial 696,837 557,098 25%
Other 2,719 2,598 5% Other 127,488 116,793 9%
47,466 42,577 11% 3,671,793 3,141,554 17%
Interconnection Interconnection
5,217 6,372 -18% 380,035 244,206 56%
Choice* Choice*
7,278 9,840 -26% 142,070 173,734 -18%
TOTAL SALES 59,961 58,789 2% TOTAL REVENUES 4,193,898 3,559,494 18%
* Includes Dearborn Industrial Group sales * Distribution charge, includes Dearborn Industrial Group revenues
Gas Sales - MichCon Service Area (Mcf) Gas Revenue - MichCon Service Area ($000s)
2005 2004 2005 2004
% Change % Change
Residential 123,089,401 127,225,642 -3% Residential 1,349,073 1,028,514 31%
Commercial 39,624,830 40,748,332 -3% Commercial 429,589 327,245 31%
Industrial 1,501,936 1,337,622 12% Industrial 15,968 10,592 51%
164,216,167 169,311,596 -3% 1,794,630 1,366,351 31%
End User End User
Transportation* Transportation*
157,046,718 144,867,269 8% 133,887 118,770 13%
TOTAL SALES 321,262,885 314,178,865 2% TOTAL REVENUES 1,928,517 1,485,121 30%
* Includes choice customers * Includes choice customers
Weather
Cooling Degree Days Heating Degree Days
Detroit Edison service territory MichCon service territory
2005 2004 2005 2004
% Change % Change
Actuals 1,109 642 73% Actuals 6,475 6,474 0%
Normal 736 736 Normal 6,779 6,779
51% -13% -4% -4%
Deviation from normal Deviation from normal
10