Regulatory Matters (Details Textuals) $ in Millions								1 Months Ended					3 Months Ended	12 Months Ended
	Feb. 01, 2016 USD ($)	Jan. 19, 2016	Dec. 18, 2015 USD ($)	Dec. 11, 2015 USD ($)	Dec. 10, 2015	Jul. 01, 2015 USD ($)	Dec. 19, 2014 USD ($)	Nov. 30, 2015 USD ($)	Jul. 31, 2015 USD ($)	Dec. 31, 2014	Jul. 31, 2014 USD ($)	Mar. 31, 2013 feed_water_pump	Dec. 31, 2015 USD ($)	Dec. 31, 2015	Jun. 30, 2015 USD ($)	Nov. 30, 2014 USD ($)	Jul. 30, 2012
Regulatory Assets [Line Items]
Deferral of investigation and remediation of costs associated with gas utilities former MGP sites														10 years
Amortization period of cost to achieve deferral														10 years
Time period required by non-bypassable securitization bond surcharge to recover securitized regulatory asset										14 years
Power Supply Cost Recovery
Regulatory Assets [Line Items]
Number of failed feed water pumps | feed_water_pump												1
Number of feed water pumps | feed_water_pump												2
DTE Electric
Regulatory Assets [Line Items]
Fermi 2 production level of full capacity																	68.00%
Maximum of challenged Fermi 2 outage charges															$ 19
DTE Electric | MPSC
Regulatory Assets [Line Items]
Damages sought											$ 22
Refund amount									$ 20
Interest calculated percent per annum									7.00%
Payment of refund									$ 25
DTE Electric | MPSC | Electric Rate Case Filing 2014
Regulatory Assets [Line Items]
Public utilities, requested rate increase (decrease)							$ 370
Public utilities, annual revenue increase						$ 230
Self-implemented base rate increase						190
Required elimination of a credit surcharge						$ 40
Public utilities, approved rate increase				$ 238
Return on equity				10.30%	10.50%
Capital debt structure				50.00%
Capital equity structure				50.00%
Disallowance amount													$ 10
DTE Electric | PSCR
Regulatory Assets [Line Items]
Estimated recovery amount									$ 16
DTE Gas | MPSC
Regulatory Assets [Line Items]
Infrastructure recovery mechanism surcharge																$ 47
Surcharge								$ 16
Surcharge due year two								$ 31
DTE Gas | MPSC | DTE Gas Rate Case Filing 2015
Regulatory Assets [Line Items]
Public utilities, requested rate increase (decrease)			$ 183
Return on equity			10.50%
Capital debt structure			48.00%
Capital equity structure			52.00%
Increased return on equity			10.75%
Increase in net plant			$ 800
Subsequent Event | DTE Electric | MPSC | Electric Rate Case Filing 2014
Regulatory Assets [Line Items]
Amortization period (in years)		20 years
Subsequent Event | DTE Electric | MPSC | Electric Rate Case Filing 2016
Regulatory Assets [Line Items]
Public utilities, requested rate increase (decrease)	$ 344
Return on equity	10.30%
Capital debt structure	50.00%
Capital equity structure	50.00%
Increased return on equity	10.50%