Commitments and Contingencies (Details Textuals) (USD $)	0 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	May 31, 2014	May 15, 2014 kWh	Dec. 31, 2014 kWh facilities dte_instances	Dec. 31, 2014 facilities dte_instances	Dec. 31, 2013
Other Commitments [Line Items]
Environmental Capital Expenditures Through Current Year				$ 2,200,000,000
Estimated capital expenditures in next fiscal year				100,000,000
Environmental Capital Expenditures In Future Years				30,000,000
EPA is Alleging Power Plants Violated New Source Performance Standards			5	5
Number of NOVs/FOVs currently being discussed with the EPA			2	2
EPA Sulfur Dioxide Ambient Air Quality Standard				1 hour
Time period to complete studies on cooling water intake structures impacts on fish - EPA ruling	3 years
Number of Former MGP Sites				3
Accrual for environmental remediation related to sites			10,000,000	10,000,000	8,000,000
Number of Permitted Engineered Ash Storage Facilities Owned				3
Waiting Period of Policy				84 days
Insurance Coverage for Extra Expense When to Necessitate Power Plant when Unavailable				490,000,000
Period of Coverage of Policy for Extra Expenses				P3Y
Primary Coverage				1,500,000,000.0
Coverage for Stabilization Decontamination Debris Removal Repair and Replacement of Property and Decommissioning				1,250,000,000.00
Combined Coverage Limit for Total Property Damage				2,750,000,000.00
Insurance Deductible for Nuclear Power Plant			1,000,000	1,000,000
Total Limit for Property Damage for Non-Nuclear Event			2,000,000,000	2,000,000,000
Limit of Coverage for Aggreagate Extra Expenses for Non-Nuclear Events				328,000,000
Limit for Property Damage for Non-Nuclear Events Aggregate of Extra Expenses of Period				2 years
NEIL Policies Against Terroism Loss				3,200,000,000
Amount per Event Loss Associated with Nuclear Power Plants				35,000,000
Maintenance of Public Liability Insurance for Nuclear Power Plants				375,000,000
Aggregate Limit of Liabilities Arises From Terroist Act Outside Scope of Trials Subject to One Industry				300,000,000
Deferred premium charges levied against each licensed nuclear facility				127,000,000
Limit Deferred Premium Charges Per Year				19,000,000
Company Obligated to Pay DOE Fee of Fermi 2 Electricity Generated and Sold1		1
New DOE fee for nuclear waste			0
Total Purchase Obligations			2,398,000,000	2,398,000,000
estimated future capital expenditures for next year				$ 1,900,000,000
Represented Employees [Member]
Other Commitments [Line Items]
Number of Represented Employees			2,600	2,600