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v3.25.3

Fair Value (Carrying Amount of Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Carrying amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | $ 1,268 | $ 884
Short-term borrowings | 216 | 1,067
Notes payable | 43 | 37
Long-term debt | 24,802 | 21,963
Carrying amount | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 24 | 35
Long-term debt | 12,775 | 11,881
Carrying amount | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 42
Short-term borrowings | 1,076 | 0
Carrying amount | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 158 | 2
Short-term borrowings | 216 | 666
Fair Value | Level 1 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 0 | 0
Notes payable | 0 | 0
Long-term debt | 1,339 | 725
Fair Value | Level 1 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 0 | 0
Long-term debt | 0 | 0
Fair Value | Level 1 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 0 | 0
Fair Value | Level 1 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 0 | 0
Fair Value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 216 | 1,067
Notes payable | 0 | 0
Long-term debt | 20,931 | 18,283
Fair Value | Level 2 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 0 | 0
Long-term debt | 11,724 | 10,449
Fair Value | Level 2 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 0 | 0
Fair Value | Level 2 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 216 | 666
Fair Value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 1,312 | 904
Short-term borrowings | 0 | 0
Notes payable | 43 | 37
Long-term debt | 1,381 | 1,128
Fair Value | Level 3 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 24 | 35
Long-term debt | 131 | 127
Fair Value | Level 3 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 42
Short-term borrowings | 1,076 | 0
Fair Value | Level 3 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 164 | 2
Short-term borrowings | $ 0 | $ 0

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