Consolidated Statements of Financial Position (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 59	$ 68
Restricted cash, principally Securitization	69	147
Accounts receivable (less allowance for doubtful accounts of $150 and $162, respectively)
Customer	1,164	1,317
Other	71	90
Inventories
Fuel and gas	554	572
Materials and supplies	231	219
Deferred income taxes	58	51
Derivative assets	123	222
Regulatory assets	157	314
Other	244	196
Total Current Assets	2,730	3,196
Investments
Nuclear decommissioning trust funds	1,029	937
Other	537	525
Total Investments	1,566	1,462
Property
Property, plant and equipment	23,442	22,541
Less accumulated depreciation, depletion and amortization	(9,038)	(8,795)
Property, plant and equipment, net	14,404	13,746
Other Assets
Goodwill	2,020	2,020
Regulatory assets	4,299	4,539
Securitized regulatory assets	456	577
Intangible assets	67	73
Notes receivable	114	123
Derivative assets	63	74
Other	190	199
Total Noncurrent Assets	7,209	7,605
Total Assets	25,909	26,009
Current Liabilities
Accounts payable	724	782
Accrued interest	122	95
Dividends payable	107	99
Short-term borrowings	98	419
Current portion long-term debt, including capital leases	633	526
Derivative liabilities	146	158
Other	479	549
Total Current Liabilities	2,309	2,628
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other	6,526	6,405
Securitization bonds	302	479
Junior subordinated debentures	280	280
Capital lease obligations	12	23
Total Long-Term Debt (net of current portion)	7,120	7,187
Other Liabilities
Deferred income taxes	3,273	3,116
Regulatory liabilities	990	1,019
Asset Retirement Obligations, Noncurrent	1,683	1,591
Unamortized investment tax credit	58	65
Derivative liabilities	30	89
Accrued pension liability	1,216	1,298
Accrued postretirement liability	1,341	1,484
Nuclear decommissioning	156	148
Other	302	331
Total Noncurrent Liabilities	9,049	9,141
Equity
Common stock, without par value, 400,000,000 shares authorized, 172,073,378 and 169,247,282 shares issued and outstanding, respectively	3,567	3,417
Retained earnings	3,969	3,750
Accumulated other comprehensive loss	(147)	(158)
Total DTE Energy Company Equity	7,389	7,009
Noncontrolling interests	42	44
Total Equity	7,431	7,053
Total Liabilities and Equity	$ 25,909	$ 26,009