Regulatory Matters (Details Textuals) (USD $)		3 Months Ended	9 Months Ended			3 Months Ended
	Jul. 29, 2013	Mar. 31, 2013 MPSC [Member] Electric [Member]	Sep. 30, 2013 MPSC [Member] Electric [Member]	Oct. 17, 2013 MPSC [Member] Electric [Member]	Jul. 30, 2012 MPSC [Member] Electric [Member]	Sep. 30, 2013 MPSC [Member] Gas [Member]	Mar. 31, 2013 MPSC [Member] Gas [Member]	Jun. 30, 2013 Five Year (Minimum) [Member]	Jun. 30, 2013 Seven Year (Maximum) [Member]
Regulatory Asset and Liability [Line Items]
Years to transition PLD customers to DTE Electric distribution system								5 years	7 years
Rate increase previously authorized by the MPSC challeged by Court of Appeals affirmed by the MPSC				$ 8,000,000
Rate Base Amount related to Advanced Metering Infrasctructure Program reopened related to previously approved order			55,000,000
PSCR under-recovery from One Plan Year Prior		87,000,000
PSCR Under-Recovery from Two Plan Years Prior		148,000,000
Two Plan Years Prior PSCR Reconciliation included amount of Purchased Power Cost Related to Manual Shutdown of Fermi 2		30,000,000
Fermi 2 Production Level of Full Capacity					68.00%
Monthly Funding Factor for all Michigan Electric utilities participating in Low Income Energy Assistance Fund	0.99
Requesting Authority to Refund Uncollectible Expense to Customers							$ 20,000,000
Time Period to Refund the UETM Overrecovery						12 months