v3.25.2
Fair Value (Realized Gains and Losses and Proceeds from Sale of Securities by Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trust fund - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Debt Securities, Available-for-sale [Line Items]        
Realized gains $ 5 $ 23 $ 13 $ 30
Realized losses (9) (10) (17) (16)
Proceeds from sale of securities $ 232 $ 239 $ 371 $ 347