v3.26.1
Long-Term Financings (Debt Redemptions) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Debt Instrument, Redemption [Line Items]    
Amount $ 137 $ 1,185
DTE Electric    
Debt Instrument, Redemption [Line Items]    
Amount 137 $ 385
DTE Electric | Securitization Bonds    
Debt Instrument, Redemption [Line Items]    
Amount $ 137  
DTE Electric | Securitization Bonds | Securitization Bonds 5.97% Due 2026    
Debt Instrument, Redemption [Line Items]    
Interest Rate 5.97%  
Amount $ 16  
DTE Electric | Securitization Bonds | Securitization Bonds 2.64% Due 2026    
Debt Instrument, Redemption [Line Items]    
Interest Rate 2.64%  
Amount $ 21  
DTE Electric | Mortgages | Mortgage Bonds 3.77% Due 2026    
Debt Instrument, Redemption [Line Items]    
Interest Rate 3.77%  
Amount $ 100