Consolidated Statements of Financial Position (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets
Cash and cash equivalents	$ 46	$ 65
Restricted cash, principally Securitization	112	122
Accounts receivable (less allowance for doubtful accounts of $63 and $62, respectively)
Customer	1,314	1,336
Other	102	126
Inventories
Fuel and gas	378	527
Materials and supplies	249	234
Deferred income taxes	0	21
Derivative assets	90	108
Regulatory assets	90	182
Other	115	194
Total Current Assets	2,496	2,915
Investments
Nuclear decommissioning trust funds	1,080	1,037
Other	574	554
Total Investments	1,654	1,591
Property
Property, plant and equipment	24,356	23,631
Less accumulated depreciation, depletion and amortization	(9,166)	(8,947)
Property, plant and equipment, net	15,190	14,684
Other Assets
Goodwill	2,018	2,018
Regulatory assets	3,790	4,235
Securitized regulatory assets	326	413
Intangible Assets	138	135
Notes receivable	106	112
Derivative assets	27	39
Other	199	197
Total Noncurrent Assets	6,604	7,149
Total Assets	25,944	26,339
Current Liabilities
Accounts payable	808	848
Accrued interest	97	93
Dividends payable	229	107
Short-term borrowings	216	240
Current portion long-term debt, including capital leases	879	817
Derivative liabilities	90	125
Gas inventory equalization	73	0
Other	570	538
Total Current Liabilities	2,962	2,768
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other	6,116	6,220
Securitization bonds	201	302
Junior subordinated debentures	480	480
Capital lease obligations	9	12
Total Long-Term Debt (net of current portion)	6,806	7,014
Other Liabilities
Deferred income taxes	3,280	3,191
Regulatory liabilities	954	1,031
Asset retirement obligations	1,784	1,719
Unamortized investment tax credit	51	56
Derivative liabilities	16	26
Accrued pension liability	1,355	1,498
Accrued postretirement liability	702	1,160
Nuclear decommissioning	164	159
Other	283	306
Total Noncurrent Liabilities	8,589	9,146
Equity
Common stock, without par value, 400,000,000 shares authorized, 174,960,000 and 172,351,680 shares issued and outstanding, respectively	3,762	3,587
Retained earnings	3,945	3,944
Accumulated other comprehensive loss	(155)	(158)
Total DTE Energy Company Equity	7,552	7,373
Noncontrolling interests	35	38
Total Equity	7,587	7,411
Total Liabilities and Equity	$ 25,944	$ 26,339