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Regulatory Matters (Details Textuals) - USD ($)
$ in Millions
Jul. 08, 2019
May 02, 2019
Feb. 01, 2019
Dec. 06, 2018
Dec. 05, 2018
Nov. 16, 2018
Jul. 06, 2018
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%         10.00%
Return on equity requested percent             10.50%
Approved rate increase   $ 125.0          
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  
Subsequent event | DTE Electric | MPSC | Electric Rate Case Filing 2019              
Public Utilities, General Disclosures [Line Items]              
Requested rate increase $ 351.0            
Return on equity percent 10.00%            
Return on equity requested percent 10.50%