v3.25.2
Financial and Other Derivative Instruments (Details Textuals) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Total derivative assets, gross $ 711 $ 694
Letters of credit issued that could be used to offset net derivative liabilities 1 1
Letters of credit received that could be used to offset net derivative assets 17 0
Contractual obligation to post collateral in event of downgrade to below investment grade 348  
Derivative net liability position aggregate fair value 507  
Collateral already posted fair value 0  
Derivative net asset position, fair value 460  
Remaining amount of offsets to derivative net liability positions for hard and soft trigger provisions 47  
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Total derivative assets, gross 709 674
Other current assets | Derivative assets — FTRs | Derivatives not designated as hedging instruments | DTE Electric    
Derivatives, Fair Value [Line Items]    
Total derivative assets, gross $ 30 $ 9