Public Utilities, Approved Depreciation Rate Increase (Decrease), Percentage

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- Definition

Public Utilities, Calculation C Submission, Reduction Of Revenues Due To Tax Cuts And Jobs Act

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- Definition

Regulatory Liabilities, Amount Filed to Refund

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- Definition

Regulatory Liabilities, Approved Refund

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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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- Definition

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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- Definition

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) - USD ($) $ in Millions	Feb. 01, 2019	Dec. 06, 2018	Dec. 05, 2018	Nov. 16, 2018	Jul. 06, 2018	Jun. 28, 2018	Apr. 18, 2018	Nov. 01, 2017	Apr. 19, 2017	Mar. 31, 2019	Aug. 31, 2018
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
Approved refund amount										$ 27.2
DTE Electric \| MPSC \| Electric Rate Case Filing 2018
Public Utilities, General Disclosures [Line Items]
Requested rate increase	$ 248.6				$ 328.0
Return on equity percent					10.00%
Return on equity requested percent					10.50%
DTE Electric \| MPSC \| 2016 DTE Electric Depreciation Case Filing
Public Utilities, General Disclosures [Line Items]
Approved composite depreciation rate increase		3.72%	3.06%
DTE Gas
Public Utilities, General Disclosures [Line Items]
Calculation C, reduction of revenue due to Tax Cuts and Jobs Act, requested				$ 12.0