Fermi 2 Production Level of Full Capacity

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Public Utilities, Purchased Power Costs Disallowed

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Amount of damages awarded to the plaintiff in the legal matter.

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Amount of public utility's interim rate increase (decrease) allowed while waiting final decision of regulatory agency.

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Amount of public utility's requested rate increase (decrease) with regulatory agency.

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The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

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Regulatory Matters (Details Textuals) - DTE Electric - USD ($) $ in Millions			1 Months Ended
	Jul. 01, 2015	Dec. 19, 2014	Jul. 24, 2015	Jul. 31, 2014	Jun. 30, 2015	Jul. 30, 2012
Public Utilities, General Disclosures [Line Items]
Fermi 2 production level of full capacity						68.00%
MPSC
Public Utilities, General Disclosures [Line Items]
Requested rate increase		$ 370
Disallowed purchased power costs					$ 19
Refund sought				$ 22
Subsequent event \| MPSC
Public Utilities, General Disclosures [Line Items]
Public Utilities, Interim Rate Increase (Decrease), Amount	$ 230
Refund awarded			$ 20
Interest rate on refund obligation			7.00%
December 19, 2014 Rate Request \| Subsequent event \| MPSC
Public Utilities, General Disclosures [Line Items]
Public Utilities, Interim Rate Increase (Decrease), Amount	190
Required elimination of a credit surcharge \| Subsequent event \| MPSC
Public Utilities, General Disclosures [Line Items]
Public Utilities, Interim Rate Increase (Decrease), Amount	$ 40
Revenue Subject to Refund [Member] \| Subsequent event \| MPSC
Public Utilities, General Disclosures [Line Items]
Refund obligation			$ 16