Consolidated Statements of Financial Position (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 68	$ 65
Restricted cash, principally Securitization	147	120
Accounts receivable (less allowance for doubtful accounts of $162 and $196, respectively)
Customer	1,317	1,351
Other	90	402
Inventories
Fuel and gas	572	460
Materials and supplies	219	202
Deferred income taxes	51	139
Derivative assets	222	131
Regulatory assets	314	100
Other	196	197
Total Current Assets	3,196	3,167
Investments
Nuclear decommissioning trust funds	937	939
Other	525	518
Total Investments	1,462	1,457
Property
Property, plant and equipment	22,541	21,574
Less accumulated depreciation, depletion and amortization	(8,795)	(8,582)
Property, plant and equipment, net	13,746	12,992
Other Assets
Goodwill	2,020	2,020
Regulatory assets	4,539	4,058
Securitized regulatory assets	577	729
Intangible assets	73	67
Notes receivable	123	123
Derivative assets	74	77
Other	199	206
Total Noncurrent Assets	7,605	7,280
Total Assets	26,009	24,896
Current Liabilities
Accounts payable	782	729
Accrued interest	95	111
Dividends payable	99	95
Short-term borrowings	419	150
Current portion long-term debt, including capital leases	526	925
Derivative liabilities	158	142
Other	549	597
Total Current Liabilities	2,628	2,749
Long-Term Debt (net of current portion)
Mortgage bonds, notes and other	6,405	6,114
Securitization bonds	479	643
Junior subordinated debentures	280	0
Trust preferred-linked securities	0	289
Capital lease obligations	23	43
Total Long-Term Debt (net of current portion)	7,187	7,089
Other Liabilities
Deferred income taxes	3,116	2,632
Regulatory liabilities	1,019	1,328
Asset retirement obligations	1,591	1,498
Unamortized investment tax credit	65	75
Derivative liabilities	89	110
Accrued pension liability	1,298	866
Accrued postretirement liability	1,484	1,275
Nuclear decommissioning	148	149
Other	331	358
Total Noncurrent Liabilities	9,141	8,291
Equity
Common stock, without par value, 400,000,000 shares authorized, 169,247,282 and 169,428,406 shares issued and outstanding, respectively	3,417	3,440
Retained earnings	3,750	3,431
Accumulated other comprehensive loss	(158)	(149)
Total DTE Energy Company Equity	7,009	6,722
Noncontrolling interests	44	45
Total Equity	7,053	6,767
Total Liabilities and Equity	$ 26,009	$ 24,896