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Long-Term Debt (Debt Issuances) (Details) - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 01, 2022 | Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Nov. 30, 2022 | Sep. 30, 2022 | Aug. 31, 2022 | Mar. 17, 2022 | Feb. 28, 2022
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Amount |  |  | $ 2,196 |  |  |  |  |  |  |
Redemption of long-term debt | $ 1,250 |  | 1,587 | $ 3,522 | $ 882 |  |  |  |  |
Unsecured | June 2022 Unsecured Term Loan Maturing In December 2023 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Amount |  |  | 200 |  |  | $ 200 |  | $ 400 |  |
DTE Electric |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Redemption of long-term debt |  |  | $ 337 | $ 321 | $ 632 |  |  |  |  |
DTE Electric | DTE Energy |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Payments of special dividend |  | $ 115 |  |  |  |  |  |  |  |
DTE Electric | Securitization Bonds |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Amount |  |  |  |  |  |  |  |  | $ 236 |
DTE Electric | Securitization Bonds | March 2022 2.64% Securitization Bonds Due 2027 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 2.64% |  |  |  |  |  |  |  |
Amount |  | $ 184 |  |  |  |  |  |  |  |
DTE Electric | Securitization Bonds | March 2022 3.11% Securitization Bonds Due 2036 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 3.11% |  |  |  |  |  |  |  |
Amount |  | $ 52 |  |  |  |  |  |  |  |
DTE Electric | Mortgage Bonds | February 2022 3.00% Mortgage Bonds Maturing in 2032 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  | 3.00%
Amount |  |  |  |  |  |  |  |  |  | $ 500
DTE Electric | Mortgage Bonds | February 2022 3.65% Mortgage Bonds Maturing In 2052 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  |  |  |  | 3.65%
Amount |  |  |  |  |  |  |  |  |  | $ 400
DTE Electric | Mortgage Bonds | 2012 Series A Mortgage Bonds |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Redemption of long-term debt |  | $ 115 |  |  |  |  |  |  |  |
DTE Gas | Mortgage Bonds | September 2022 4.76% Mortgage Bonds Due 2032 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 4.76% |  |  |
Amount |  |  |  |  |  |  | $ 130 |  |  |
DTE Gas | Mortgage Bonds | September 2022 5.05% Mortgage Bonds Due 2052 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 5.05% |  |  |
Amount |  |  |  |  |  |  | $ 130 |  |  |

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