Commitments and Contingencies (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Commitments and Contingencies (Textuals) [Abstract]
Number of defendants of oil, power and coal companies in a United States District Court on the basis of which DTE Energy was named	24
Number of people in Kivalina, Alaska, claiming business activities contributing to global warming, higher temperatures and storm activity	400
Costs associated with relocating village and unspecified attorney's fees and expenses	$ 400,000,000
Number of employees representing the company	5,000
Number of represented employees who ratified new contract	400
Initial estimated capital expenditure	80,000,000
Duration of commitment	2011 through 2051
Possible Environmental Capital Expenditures to comply with requirements	1,000,000
Possible Environmental Capital Expenditures over the next few years	13,000,000
Air [Member] | Electric Utility [Member]
Loss Contingencies [Line Items]
Amount spent on controlling fossil-fueled power plants	1,500,000,000
Future undiscounted capital expenditures for 2010	205,000,000
Possible additional capital expenditure in response to EPA Regulations through 2020	2,000,000,000
Contaminated Site [Member] | Gas Utility [Member]
Loss Contingencies [Line Items]
Accrued for remediation related to the sites	37,000,000	36,000,000
Number of former MGP sites	15
Period gas utility can amortize MGP costs	10
Contaminated Site [Member] | Electric Utility [Member]
Loss Contingencies [Line Items]
Accrued for remediation related to the sites	9,000,000	9,000,000
Number of former MGP sites	3
Property Insurance [Member] | Nuclear Operations [Member]
Loss Contingencies [Line Items]
Waiting period of policy	P12W
Aggregate coverage of insurance over a three-year period	490,000,000
Period of coverage of policy for extra expenses	over a three-year period
Primary coverage	500,000,000
Coverage for stabilization, decontamination, debris removal, repair and/or replacement of property and decommissioning	2,250,000,000
Combined coverage limit for total property damage	2,750,000,000
NEIL policies against terrorism loss	3,200,000,000
Maximum assessment amount related to the loss associated with any one of terrorism event	29,000,000
Public Liability Insurance [Member] | Nuclear Operations [Member]
Loss Contingencies [Line Items]
Maintenance of public liability insurance for nuclear incident	375,000,000
Aggregate limit of liabilities arises from terrorist act outside the scope of TRIA is subject to one industry	300,000,000
Deferred premium charges levied against each licensed nuclear facility	117,500,000
Limit deferred premium charges per year	17,500,000
Nuclear Fuel Disposal Costs [Member] | Nuclear Operations [Member]
Loss Contingencies [Line Items]
Detroit Edison is obligated to pay the DOE a fee of Fermi 2 electricity generated and sold	1 mill per kWh
Purchase Commitments [Member]
Loss Contingencies [Line Items]
Total	5,000,000,000
Estimated capital expenditures for year 2011	1,700,000,000
Other Guarantees [Member]
Loss Contingencies [Line Items]
Maximum potential amount of future payments under guarantee	10,000,000
Performance bonds outstanding	$ 14,000,000