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v3.23.3

Long-Term Debt (Details Textuals) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) | May 31, 2023 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Nov. 01, 2023 USD ($) tranche | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt |  |  |  |  |  | $ 594,000,000 |  |  |  | $ 1,124,000,000
Face amount issued |  |  |  |  |  | 2,300,000,000 |  |  |  |
Retirement of debt |  |  |  |  |  | 1,146,000,000 | $ 316,000,000 |  |  |
DTE Electric |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt |  |  |  |  |  | 542,000,000 |  |  |  | $ 248,000,000
Retirement of debt |  |  |  |  |  | $ 121,000,000 | $ 316,000,000 |  |  |
DTE Electric | Forecast |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Retirement of debt |  |  |  |  | $ 300,000,000 |  |  |  |  |
DTE Electric | Forecast | Parent |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Payment of special dividend |  |  |  |  | $ 300,000,000 |  |  |  |  |
Unsecured term loan | June 2022 Unsecured Term Loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Unused loan capacity |  |  |  | $ 1,125,000,000 |  |  |  |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  |  | $ 1,000,000,000 |
Unused loan capacity terminated |  | $ 125,000,000 |  |  |  |  |  |  |  |
Face amount issued |  |  |  |  |  |  |  |  | $ 200,000,000 |
Retirement of debt |  | $ 200,000,000 | $ 800,000,000 |  |  |  |  |  |  |
Unsecured term loan | June 2022 Unsecured Term Loan | SOFR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 0.90% |  |  |  |  |  |
Mortgage Bonds | 5.57% First Mortgage Bonds due in 2030 | DTE Gas | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount issued | $ 150,000,000 |  |  |  |  |  |  |  |  |
Interest rate | 5.57% |  |  |  |  |  |  |  |  |
Mortgage Bonds | 5.73% First Mortgage Bonds due in 2035 | DTE Gas | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount issued | $ 145,000,000 |  |  |  |  |  |  |  |  |
Interest rate | 5.73% |  |  |  |  |  |  |  |  |
Senior Notes | 5.19% 2005 Series C Senior Notes | DTE Electric | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate | 5.19% |  |  |  |  |  |  |  |  |
Retirement of debt | $ 100,000,000 |  |  |  |  |  |  |  |  |
Securitization Bonds | DTE Electric | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount issued |  |  |  |  |  |  |  | $ 602,000,000 |  |
Number of tranches | tranche |  |  |  |  |  |  |  | 2 |  |
Securitization Bonds | 5.97% Securitization Bonds due in 2033 | DTE Electric | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount issued |  |  |  |  |  |  |  | $ 301,000,000 |  |
Interest rate |  |  |  |  |  |  |  | 5.97% |  |
Securitization Bonds | 6.09% Securitization Bonds due in 2038 | DTE Electric | Subsequent Event |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount issued |  |  |  |  |  |  |  | $ 301,000,000 |  |
Interest rate |  |  |  |  |  |  |  | 6.09% |  |

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