Long-Term Debt (Debt Redemptions) (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Debt Instrument, Redemption [Line Items] | ||
| Amount | $ 1,185 | $ 119 |
| Senior Notes | Senior Notes 1.05% Due 2025 | ||
| Debt Instrument, Redemption [Line Items] | ||
| Interest Rate | 1.05% | |
| Amount | $ 800 | |
| DTE Electric | ||
| Debt Instrument, Redemption [Line Items] | ||
| Amount | $ 385 | $ 119 |
| DTE Electric | Mortgage Bonds | Mortgage Bonds 3.38% Due 2025 | ||
| Debt Instrument, Redemption [Line Items] | ||
| Interest Rate | 3.38% | |
| Amount | $ 350 | |
| DTE Electric | Securitization Bonds | Securitization Bonds 5.97% Due 2025 | ||
| Debt Instrument, Redemption [Line Items] | ||
| Interest Rate | 5.97% | |
| Amount | $ 15 | |
| DTE Electric | Securitization Bonds | Securitization Bonds 2.64% Due 2025 | ||
| Debt Instrument, Redemption [Line Items] | ||
| Interest Rate | 2.64% | |
| Amount | $ 20 | |