Regulatory Matters (Details Textuals) (DTE Electric, USD $)	0 Months Ended
	Dec. 19, 2014	Sep. 30, 2013	Jul. 30, 2012	Jan. 01, 2014	Sep. 30, 2012	Apr. 24, 2015
Public Utilities, General Disclosures [Line Items]
Fermi 2 production level of full capacity			68.00%
Maximum of challenged Fermi 2 outage charges		$ 32,000,000
MPSC
Public Utilities, General Disclosures [Line Items]
Public utilities, requested rate increase (decrease)	370,000,000
MPSC | Refundable Revenue Decoupling
Public Utilities, General Disclosures [Line Items]
Regulatory liability					127,000,000
Monthly amount to amortize from liability to income				10,600,000
Subsequent Event | MPSC
Public Utilities, General Disclosures [Line Items]
Maximum of challenged Fermi 2 outage charges						$ 50,000,000