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v3.25.3

Commitments and Contingencies (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 USD ($) employee | Sep. 30, 2025 USD ($) employee site | Dec. 31, 2022 USD ($) | Dec. 31, 2024 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Asset retirement obligations | $ 4,413,000,000 | $ 4,413,000,000 |  | $ 4,031,000,000
Estimated capital expenditures for current fiscal year | 4,900,000,000 | 4,900,000,000 |  |
Penalties Related to EES Coke | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss contingency accrual | $ 8,000,000 | $ 8,000,000 |  |
Workforce subject to collective bargaining arrangements | Labor force concentration risk |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Entity number of employees | employee | 4,800 | 4,800 |  |
Percentage of total employees |  | 50.00% |  |
Workforce subject to collective bargaining arrangements expiring within one year | Labor force concentration risk |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Percentage of total employees |  | 15.00% |  |
Reduced emissions fuel guarantees |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of days after expiration of statutes of limitations (in days) |  | 90 days |  |
Maximum potential liability | $ 201,000,000 | $ 201,000,000 |  |
Other guarantees |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Maximum potential liability | 69,000,000 | 69,000,000 |  |
Performance surety bonds |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Performance bonds outstanding | 424,000,000 | 424,000,000 |  |
Performance surety bonds | Energy Trading segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Performance bonds outstanding | 131,000,000 | $ 131,000,000 |  |
Performance surety bonds | Minimum | Energy Trading segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Performance bonds term (in years) |  | 1 year |  |
Performance surety bonds | Maximum | Energy Trading segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Performance bonds term (in years) |  | 3 years |  |
DTE Electric |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental capital expenditures | 2,400,000,000 | $ 2,400,000,000 |  |
Estimated environmental capital expenditures |  | $ 0 |  |
Number of former MGP sites | site |  | 3 |  |
Accrued for remediation | 10,000,000 | $ 10,000,000 |  | 10,000,000
Asset retirement obligations | 4,163,000,000 | 4,163,000,000 |  | 3,791,000,000
Estimated capital expenditures for current fiscal year | $ 3,700,000,000 | $ 3,700,000,000 |  |
DTE Electric | Ludington Plant Contract Dispute | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought, percentage liable |  |  | 49.00% |
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Entity number of employees | employee | 2,550 | 2,550 |  |
Percentage of total employees |  | 58.00% |  |
DTE Electric | Workforce subject to collective bargaining arrangements expiring within one year | Labor force concentration risk |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Percentage of total employees |  | 22.00% |  |
DTE Electric | Minimum | Ludington Plant Contract Dispute | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimated impact of loss contingency | $ 350,000,000 | $ 350,000,000 |  |
DTE Electric | Maximum | Ludington Plant Contract Dispute | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimated impact of loss contingency | 400,000,000 | 400,000,000 |  |
DTE Electric | Performance surety bonds |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Performance bonds outstanding | 248,000,000 | 248,000,000 |  |
DTE Electric | Legacy CCR Surface Impoundments And CCR Management Units |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Asset retirement obligations | 430,000,000 | 430,000,000 |  |
Asset retirement obligation, period increase | 130,000,000 |  |  |
DTE Electric | Coal Combustion Residual and Effluent Limitations Guidelines Rules, capital expenditures |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimated impact of loss contingency | 414,000,000 | $ 414,000,000 |  |
DTE Gas |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of former MGP sites | site |  | 14 |  |
Accrued for remediation | $ 25,000,000 | $ 25,000,000 |  | $ 26,000,000
Amortization period (in years) |  | 10 years |  |
DTE Gas | Clean up completed and site closed |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of former MGP sites | site |  | 8 |  |
DTE Gas | Partial closure complete |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of former MGP sites | site |  | 5 |  |
TAES and Toshiba Corporation | Ludington Plant Contract Dispute | DTE Electric and Consumers | Pending litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought |  |  | $ 15,000,000 |

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