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Fair Value (Fair Value of Financial Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Carrying amount |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | $ 963 | $ 884
Short-term borrowings | 513 | 1,067
Notes payable | 39 | 37
Long-term debt | 22,693 | 21,963
Carrying amount | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 27 | 35
Long-term debt | 11,518 | 11,881
Carrying amount | DTE Electric | Affiliates |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 42
Short-term borrowings | 960 | 0
Carrying amount | DTE Electric | Customer/ Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 35 | 2
Short-term borrowings | 513 | 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 | 714 | 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 | Customer/ 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 | 513 | 1,067
Notes payable | 0 | 0
Long-term debt | 19,248 | 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 | 10,218 | 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 | Customer/ Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 0 | 0
Short-term borrowings | 513 | 666
Fair value | Level 3 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 963 | 904
Short-term borrowings | 0 | 0
Notes payable | 39 | 37
Long-term debt | 1,156 | 1,128
Fair value | Level 3 | DTE Electric |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes payable | 27 | 35
Long-term debt | 133 | 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 | 960 | 0
Fair value | Level 3 | DTE Electric | Customer/ Other |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Notes receivable | 35 | 2
Short-term borrowings | $ 0 | $ 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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- Definition Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
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