Consolidated Statements of Financial Position (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 65	$ 68
Restricted cash, principally Securitization	122	147
Accounts receivable (less allowance for doubtful accounts of $62 and $162, respectively)
Customer	1,336	1,317
Other	126	90
Inventories
Fuel and gas	527	572
Materials and supplies	234	219
Deferred income taxes	21	51
Derivative assets	108	222
Regulatory assets	182	314
Other	194	196
Total Current Assets	2,915	3,196
Investments
Nuclear decommissioning trust funds	1,037	937
Other	554	525
Total Investments	1,591	1,462
Property
Property, plant and equipment	23,631	22,541
Less accumulated depreciation, depletion and amortization	(8,947)	(8,795)
Property, plant and equipment, net	14,684	13,746
Other Assets
Goodwill	2,018	2,020
Regulatory assets	4,235	4,539
Securitized regulatory assets	413	577
Intangible assets	135	73
Notes receivable	112	123
Derivative assets	39	74
Other	197	199
Total Noncurrent Assets	7,149	7,605
Total Assets	26,339	26,009
Current Liabilities
Accounts payable	848	782
Accrued interest	93	95
Dividends payable	107	99
Short-term borrowings	240	419
Current portion long-term debt, including capital leases	817	526
Derivative liabilities	125	158
Other	538	549
Total Current Liabilities	2,768	2,628
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other	6,220	6,405
Securitization bonds	302	479
Junior subordinated debentures	480	280
Capital lease obligations	12	23
Total Long-Term Debt (net of current portion)	7,014	7,187
Other Liabilities
Deferred income taxes	3,191	3,116
Regulatory liabilities	1,031	1,019
Asset retirement obligations	1,719	1,591
Unamortized investment tax credit	56	65
Derivative liabilities	26	89
Accrued pension liability	1,498	1,298
Accrued postretirement liability	1,160	1,484
Nuclear decommissioning	159	148
Other	306	331
Total Noncurrent Liabilities	9,146	9,141
Equity
Common stock, without par value, 400,000,000 shares authorized, 172,351,680 and 169,247,282 shares issued and outstanding, respectively	3,587	3,417
Retained earnings	3,944	3,750
Accumulated other comprehensive loss	(158)	(158)
Total DTE Energy Company Equity	7,373	7,009
Noncontrolling interests	38	44
Total Equity	7,411	7,053
Total Liabilities and Equity	$ 26,339	$ 26,009