v3.26.1
Long-Term Financings (Details Textuals) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
1 Months Ended 3 Months Ended
Dec. 31, 2025
Jun. 30, 2026
Mar. 31, 2026
Department Of Energy Title 17 Loan | DTE Gas      
Debt Instrument [Line Items]      
Debt instrument, face amount   $ 1,600  
Debt drawn   $ 0  
At-the-Market Program      
Debt Instrument [Line Items]      
Authorized aggregate, amount $ 1,500    
Number of shares issued under equity forward sale agreements (in shares)   1.2 2.5
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share)   $ 141.96 $ 144.41