Amount of Regulatory Costs Approved, Maximum Rate Base

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- Definition

Public Utilities, Credit A Approval, Reduction Of Revenue Due To Tax Cuts And Jobs Act

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Public Utilities, Credit A Submission, Reduction Of Revenue Due To Tax Cuts And Jobs Act

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- Definition

Public Utilities, Credit B Submission, Refund Due To Tax Cuts And Jobs Act

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- Definition

Public Utilities, Property, Plant and Equipment, Generation Facility, Number of Certificates of Necessity Approved for Issuance

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- Definition

Public Utilities, Property, Plant and Equipment, Generation Facility, Number of Certificates of Necessity Requested for Issuance

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- Definition

Public Utilities, Property, Plant and Equipment, Generation Facility, Power

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- Definition

Regulatory Liabilities, Amount Filed to Refund

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- Definition

Amount of regulatory costs not yet approved by the regulatory authority.

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- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

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- Definition

Percentage of public utility's approved return on equity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of public utility's requested rate increase (decrease) with regulatory agency.

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Percentage of public utility's requested return on equity.

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Regulatory Matters (Details Textuals) $ in Millions	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 ($)	Apr. 19, 2017 USD ($)	Aug. 31, 2018 USD ($)	Apr. 27, 2018 USD ($) certificate	Jul. 31, 2017 USD ($) certificate MW
DTE Electric
Public Utilities, General Disclosures [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
DTE Electric \| MPSC \| Electric Rate Case Filing 2017
Public Utilities, General Disclosures [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
Public Utilities, General Disclosures [Line Items]
Amount filed to refund to customers															$ 26.2
DTE Electric \| MPSC \| Electric Rate Case Filing 2018
Public Utilities, General Disclosures [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
Public Utilities, General Disclosures [Line Items]
Amount of power associated with natural gas fueled combined cycle generation facility requesting to build \| 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 Gas
Public Utilities, General Disclosures [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
DTE Gas \| MPSC \| DTE Gas Rate Case Filing 2017
Public Utilities, General Disclosures [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%