Organization and Basis of Presentation (Details Textuals) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013 customers
Legal Entities [Line Items]
Number of Electric Customers	2,100,000
Number of Gas Customers	1,200,000
Significant Potential Exposure to Loss Due to VIE Long-Term Purchase Contracts	$ 0

Significant Potential Exposure to Loss Due to VIE Long-Term Purchase Contracts

No definition available.

Name:	dte_SignificantPotentialExposureToLossDueToVieLongTermPurchaseContracts
Namespace Prefix:	dte_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant