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Short-Term Credit Arrangements and Borrowings (Availability Under Credit Facilities) (Details) $ in Millions | Sep. 30, 2025 USD ($)
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Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | $ 3,200
Amounts outstanding at September 30, 2025 | 660
Net availability at September 30, 2025 | 2,540
DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 950
Amounts outstanding at September 30, 2025 | 349
Net availability at September 30, 2025 | 601
DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 300
Amounts outstanding at September 30, 2025 | 0
Net availability at September 30, 2025 | 300
DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 1,950
Amounts outstanding at September 30, 2025 | 311
Net availability at September 30, 2025 | 1,639
Letters of credit |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 444
Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 133
Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 0
Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 311
Commercial paper issuances |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 216
Commercial paper issuances | DTE Electric |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 216
Commercial paper issuances | DTE Gas |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 0
Commercial paper issuances | DTE Energy |
Line Of Credit Facility [Line Items] |
Amounts outstanding at September 30, 2025 | 0
Unsecured revolving credit facility, expiring October 2029 | Revolving credit facility |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 2,600
Unsecured revolving credit facility, expiring October 2029 | Revolving credit facility | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 800
Unsecured revolving credit facility, expiring October 2029 | Revolving credit facility | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 300
Unsecured revolving credit facility, expiring October 2029 | Revolving credit facility | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 1,500
Unsecured letter of credit facility, expiring June 2026 | Letters of credit |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring June 2026 | Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility, expiring February 2027 | Letters of credit |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring February 2027 | Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility, expiring June 2027 | Letters of credit |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 100
Unsecured letter of credit facility, expiring June 2027 | Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring June 2027 | Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility, expiring June 2027 | Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 100
Unsecured letter of credit facility | Letters of credit |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 50
Unsecured letter of credit facility | Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility | Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility | Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 50
Unsecured letter of credit facility | Letters of credit |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility | Letters of credit | DTE Electric |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 150
Unsecured letter of credit facility | Letters of credit | DTE Gas |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | 0
Unsecured letter of credit facility | Letters of credit | DTE Energy |
Line Of Credit Facility [Line Items] |
Maximum borrowing capacity | $ 0

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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