Regulatory Matters (Details Textuals) - MPSC - USD ($) $ in Millions	Feb. 12, 2021	Mar. 26, 2021	Jul. 09, 2020
DTE Electric
Public Utilities, General Disclosures [Line Items]
Regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA, accelerated amortization approved			$ 102
Requested securitization of qualified costs		$ 184
DTE Gas | 2021 Gas Rate Case Filing
Public Utilities, General Disclosures [Line Items]
Requested rate increase	$ 195
Return on equity percent	9.90%
Return on equity requested percent	10.25%