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Leases (Components of Lease Cost) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Lessee, Lease, Description [Line Items] |  |  |
Operating lease cost | $ 22 | $ 18 | $ 19
Finance lease cost: |  |  |
Amortization of right-of-use assets | 7 | 7 | 7
Interest of lease liabilities | 0 | 1 | 1
Total finance lease cost | 7 | 8 | 8
Variable lease cost | 13 | 9 | 9
Short-term lease cost | 12 | 19 | 14
Total lease cost | 54 | 54 | 50
DTE Electric |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Operating lease cost | 17 | 12 | 14
Finance lease cost: |  |  |
Amortization of right-of-use assets | 6 | 6 | 6
Interest of lease liabilities | 0 | 0 | 0
Total finance lease cost | 6 | 6 | 6
Variable lease cost | 0 | 0 | 0
Short-term lease cost | 4 | 10 | 6
Total lease cost | $ 27 | $ 28 | $ 26

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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