Commitments and Contingencies (Details Textuals) (USD $)	6 Months Ended	108 Months Ended		6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2013 kWh dte_instances facilities	Jun. 27, 2022	Jul. 18, 2013	Jun. 30, 2013 Electric [Member] facilities dte_instances	Dec. 31, 2012 Electric [Member]	Jun. 30, 2013 Gas [Member] facilities	Dec. 31, 2012 Gas [Member]	Jun. 30, 2013 Synthetic Fuel [Member]	Jun. 30, 2013 Emissions [Member]
Loss Contingencies [Line Items]
Environmental Capital Expenditures Through Current Year				$ 1,900,000,000
Environmental Capital Expenditures in Current Year				335,000,000
Environmental Capital Expenditures In Future Years				1,800,000,000
EPA is Alleging Detroit Edison Power Plants Violated New Source Performance Standards				5
Number of NOVs/FOVs currently being discussed with the EPA	2
Sierra Club is Alleging DTE Electric Coal Fired Power Plants Violated the Clean Air Act	4
Exceedances of Opacity Standard				1,499
2004 EPA proposed compliance timeline in years		8 years
Number of Former MGP Sites				3		15
Accrued for remediation related to the sites				9,000,000	9,000,000	30,000,000	29,000,000
Number of Options to Regulate Coal Ash Residue				2
Period Gas Utility Can Amortize MGP Costs						10 years
Number of NOVs	2
Possible Environmental Capital Expenditures to Comply with Requirements	6,000,000
EPA Sulfur Dioxide Ambient Air Quality Standard	1
Waiting Period of Policy	P12W
Insurance Coverage for Extra ExpenseWhen to Necessitate Power Plant when Unavailable	490,000,000
Period of Coverage of Policy for Extra Expenses	3 years
Primary Coverage	500,000,000
Coverage for Stabilization Decontamination Debris Removal Repair and Replacement of Property and Decommissioning	2,250,000,000
Combined Coverage Limit for Total Property Damage	2,750,000,000
Insurance Deductible for Nuclear Power Plant	1,000,000
Total Limit for Property Damage for Non-Nuclear Events	1,800,000,000
Limit for Property Damage for Non-Nuclear Events Aggregate of Extra Expenses	327,000,000
Limit for Property Damage for Non-Nuclear Events Aggregate of Extra Expenses of Period	2 years
Time Period for TRIA Insurance After the First Loss from Terrorism	1 year
NEIL Policies Against Terrorism Loss	3,200,000,000
Amount per Event Loss Associated with Nuclear Power Plants	33,000,000
Time Period for Maximum Assessments for Losses Associated to Events at Nuclear Plants	1 year
Maintenance of Public Liability Insurance for Nuclear Power Plants	375,000,000
Aggregate Limit of Liabilities Arises From Terrorist Act Outside Scope of Trials Subject to One Industry	300,000,000
Deferred Premium Charged Leviied Against Each Licensed Nuclear Facility	117,500,000
Limit Deferred Premium Charges Per Year	17,500,000
Company Obligated to Pay DOE Fee of Fermi 2 Electricity Generated and Sold	1
Settlement Provided for Delay-Related Costs	48,000,000
Days Obligations will Survive After Expiration of All Applicable Statutes of Limiations								90 days	90 days
Guarantor Obligations, Maximum Exposure, Undiscounted								1,200,000,000	103,000,000
Guarantee Obligations Maximum Exposure One	61,000,000
Performance Bonds Outstanding	41,000,000
Long-term Purchase Commitment, Amount	4,400,000,000
estimated future capital expenditures for current year	2,200,000,000
Bankruptcy Claims, Accounts Receivable under Review by Management			$ 18,000,000