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Property, Plant, and Equipment (Capitalized Software) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Property, Plant, and Equipment [Line Items] |  |  |
Amortization expense of capitalized software | $ 192 | $ 189 | $ 159
Gross carrying value of capitalized software | 1,005 | 940 |
Accumulated amortization of capitalized software | 476 | 427 |
DTE Electric |  |  |
Property, Plant, and Equipment [Line Items] |  |  |
Amortization expense of capitalized software | 175 | 172 | $ 146
Gross carrying value of capitalized software | 910 | 849 |
Accumulated amortization of capitalized software | $ 414 | $ 369 |

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- Definition Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 + Details
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