Consolidated Statements of Financial Position (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 71	$ 65
Restricted cash, principally Securitization	64	122
Accounts receivable (less allowance for doubtful accounts of $67 and $62, respectively)
Customer	1,239	1,336
Other	81	126
Inventories
Fuel and gas	467	527
Materials and supplies	258	234
Deferred income taxes	0	21
Derivative assets	72	108
Regulatory assets	49	182
Other	248	194
Total Current Assets	2,549	2,915
Investments
Nuclear decommissioning trust funds	1,139	1,037
Other	584	554
Total Investments	1,723	1,591
Property
Property, plant and equipment	24,795	23,631
Less accumulated depreciation, depletion and amortization	(9,284)	(8,947)
Property, plant and equipment, net	15,511	14,684
Other Assets
Goodwill	2,018	2,018
Regulatory assets	3,700	4,235
Securitized regulatory assets	280	413
Intangible Assets	122	135
Notes receivable	104	112
Derivative assets	26	39
Other	198	197
Total Noncurrent Assets	6,448	7,149
Total Assets	26,231	26,339
Current Liabilities
Accounts payable	866	848
Accrued interest	114	93
Dividends payable	116	107
Short-term borrowings	271	240
Current portion long-term debt, including capital leases	896	817
Derivative liabilities	58	125
Regulatory liabilities	230	89
Other	457	449
Total Current Liabilities	3,008	2,768
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other	6,253	6,220
Securitization bonds	105	302
Junior subordinated debentures	480	480
Capital lease obligations	8	12
Total Long-Term Debt (net of current portion)	6,846	7,014
Other Liabilities
Deferred income taxes	3,290	3,191
Regulatory liabilities	907	1,031
Asset retirement obligations	1,800	1,719
Unamortized investment tax credit	49	56
Derivative liabilities	21	26
Accrued pension liability	1,254	1,498
Accrued postretirement liability	684	1,160
Nuclear decommissioning	172	159
Other	290	306
Total Noncurrent Liabilities	8,467	9,146
Equity
Common stock, without par value, 400,000,000 shares authorized, 176,797,248 and 172,351,680 shares issued and outstanding, respectively	3,885	3,587
Retained earnings	4,142	3,944
Accumulated other comprehensive loss	(151)	(158)
Total DTE Energy Company Equity	7,876	7,373
Noncontrolling interests	34	38
Total Equity	7,910	7,411
Total Liabilities and Equity	$ 26,231	$ 26,339