Regulatory Matters (Details) $ in Millions																			12 Months Ended
	Dec. 20, 2018 USD ($)	Dec. 06, 2018	Dec. 05, 2018	Nov. 16, 2018 USD ($)	Sep. 21, 2018 USD ($)	Sep. 13, 2018 USD ($)	Jul. 30, 2018 USD ($)	Jul. 24, 2018 USD ($)	Jul. 06, 2018 USD ($)	Jun. 28, 2018 USD ($)	May 30, 2018 USD ($)	May 24, 2018 USD ($)	May 18, 2018 USD ($)	Apr. 18, 2018 USD ($)	Mar. 28, 2018 USD ($)	Nov. 22, 2017 USD ($)	Nov. 01, 2017 USD ($)	Apr. 19, 2017 USD ($)	Dec. 31, 2018	Aug. 31, 2018 USD ($)	Apr. 27, 2018 USD ($) certificate	Jul. 31, 2017 USD ($) certificate MW
Regulatory Assets [Line Items]
Deferral of investigation and remediation of costs associated with gas utilities former MGP sites																			10 years
DTE Electric
Regulatory Assets [Line Items]
Reduction of revenue due to Tax Cuts and Jobs Act, requested													$ 157.0
Reduction of revenue due to Tax Cuts and Jobs Act, approved								$ 157.0
Refund due to Tax Cuts and Jobs Act, requested					$ 93.0
Refund due to Tax Cuts and Jobs Act, approved	$ 93.0
DTE Electric | MPSC | Electric Rate Case Filing 2017
Regulatory Assets [Line Items]
Requested rate increase																	$ 125.0	$ 231.0
Approved rate increase										$ 74.4				$ 65.2
Return on equity, percent														10.00%
DTE Electric | MPSC | Electric Rate Case Filing 2017 | Refundable Self-Implemented Rates
Regulatory Assets [Line Items]
Amount filed to refund to customers																				$ 26.2
DTE Electric | MPSC | Electric Rate Case Filing 2018
Regulatory Assets [Line Items]
Requested rate increase									$ 328.0
Return on equity, percent									10.00%
Return on equity, requested percent									10.50%
DTE Electric | MPSC | Certificate of Necessity Request
Regulatory Assets [Line Items]
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
Number of certificates of necessity approved for issuance | certificate																					3
Approved recoverable amounts, maximum rate																					$ 951.8
DTE Electric | MPSC | 2016 DTE Main Electric Depreciation Case Filing
Regulatory Assets [Line Items]
Approved depreciation rate increase		3.72%	3.06%
DTE Gas
Regulatory Assets [Line Items]
Reduction of revenue due to Tax Cuts and Jobs Act, requested															$ 38.2
Reduction of revenue due to Tax Cuts and Jobs Act, approved											$ 38.2
Refund due to Tax Cuts and Jobs Act, requested							$ 25.0
Calculation C, reduction of revenue due to Tax Cuts and Jobs Act, requested				$ 12.0
DTE Gas | MPSC | DTE Gas Rate Case Filing 2017
Regulatory Assets [Line Items]
Requested rate increase												$ 38.1				$ 85.1
Approved rate increase						$ 9.0
Return on equity, percent						10.00%										10.10%
Return on equity, requested percent																10.50%
Nuclear Performance Evaluation and Review Committee Tracker
Regulatory Assets [Line Items]
Approved amortization period																			5 years
Customer360 deferred costs
Regulatory Assets [Line Items]
Approved amortization period																			15 years