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Fair Value (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Carrying Amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | $ 884 | $ 175
Short-term borrowings | 1,067 | 1,283
Notes payable | 37 | 34
Long-term debt | 21,963 | 19,546
Carrying Amount | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term borrowings | 666 | 385
Notes payable | 35 | 33
Long-term debt | 11,881 | 11,043
Carrying Amount | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 2 | 19
Carrying Amount | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 42 | 0
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 | 725 | 807
Fair Value | Level 1 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term borrowings | 0 | 0
Notes payable | 0 | 0
Long-term debt | 0 | 0
Fair Value | Level 1 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Fair Value | Level 1 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Fair Value | Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 1,067 | 1,283
Notes payable | 0 | 0
Long-term debt | 18,283 | 16,178
Fair Value | Level 2 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term borrowings | 666 | 385
Notes payable | 0 | 0
Long-term debt | 10,449 | 9,999
Fair Value | Level 2 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Fair Value | Level 2 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Fair Value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 904 | 181
Short-term borrowings | 0 | 0
Notes payable | 37 | 34
Long-term debt | 1,128 | 1,202
Fair Value | Level 3 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term borrowings | 0 | 0
Notes payable | 35 | 33
Long-term debt | 127 | 126
Fair Value | Level 3 | DTE Electric | Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 2 | 19
Fair Value | Level 3 | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | $ 42 | $ 0

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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