Regulatory Matters (Details) $ in Millions								3 Months Ended	12 Months Ended
	Nov. 22, 2017 USD ($)	Sep. 08, 2017 USD ($)	Jul. 12, 2017 USD ($)	Apr. 19, 2017 USD ($)	Jan. 31, 2017 USD ($)	Aug. 01, 2016 USD ($)	Feb. 01, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017	Jul. 31, 2017 USD ($) certificate MW	Mar. 31, 2016 USD ($)
Regulatory Assets [Line Items]
Deferral of investigation and remediation of costs associated with gas utilities former MGP sites									10 years
DTE Electric | MPSC
Regulatory Assets [Line Items]
Estimated recovery challenged amount											$ 13.0
Estimated recovery disallowed, including interest			$ 16.0
Amount of power associated with natural gas fueled combined cycle generation facility | MW										1,100
Number of certificates of necessity requested to be issued | certificate										3
Estimated capital costs										$ 989.0
DTE Electric | MPSC | Electric Rate Case Filing 2016
Regulatory Assets [Line Items]
Requested rate increase							$ 344.0
Self-implemented base rate increase						$ 245.0
Approved annual revenue increase					$ 184.0
Return on equity, percent					10.10%
DTE Electric | MPSC | Electric Rate Case Filing 2017
Regulatory Assets [Line Items]
Requested rate increase		$ 125.0		$ 231.0
Return on equity, percent				10.10%
Return on equity, requested percent				10.50%
DTE Gas | MPSC | DTE Gas Rate Case Filing 2017
Regulatory Assets [Line Items]
Requested rate increase	$ 85.1
Return on equity, percent	10.10%
Return on equity, requested percent	10.50%
Refundable Self-Implemented Rates | DTE Electric | MPSC | Electric Rate Case Filing 2016
Regulatory Assets [Line Items]
Authorized amount to be refunded to customers								$ 38.5
Customer360 deferred costs
Regulatory Assets [Line Items]
Approved amortization period									15 years
Nuclear Performance Evaluation and Review Committee Tracker
Regulatory Assets [Line Items]
Approved amortization period									5 years