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Regulatory Matters (Details Textuals) - DTE Electric - MPSC - USD ($)
$ in Millions
Apr. 19, 2017
Jan. 31, 2017
Nov. 01, 2016
Aug. 01, 2016
Feb. 01, 2016
Mar. 31, 2017
Public Utilities, General Disclosures [Line Items]            
Estimated recovery challenged amount           $ 13
Electric Rate Case Filing 2016            
Public Utilities, General Disclosures [Line Items]            
Requested rate increase         $ 344  
Self-implemented base rate       $ 245    
Approved annual revenue change   $ 184        
Return on equity percent   10.10%        
DTE Main Electric Depreciation Case Filing 2016            
Public Utilities, General Disclosures [Line Items]            
Requested depreciation rate increase (decrease) amount     $ 156      
Subsequent event | Electric Rate Case Filing 2017            
Public Utilities, General Disclosures [Line Items]            
Requested rate increase $ 231          
Return on equity percent 10.10%          
Return on equity requested percent 10.50%          
Refundable self-implemented rates | Electric Rate Case Filing 2016            
Public Utilities, General Disclosures [Line Items]            
Refund liabilities           $ 37