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Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Assets [Line Items] |  |
Regulatory assets | $ 6,317 | $ 4,336
Less amount included in Current Assets | (108) | (450)
Regulatory assets, noncurrent | 6,209 | 3,886
Securitized regulatory assets | 758 | 206
Recoverable undepreciated costs on retiring plants |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 2,736 | 594
Pension |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 1,421 | 1,362
Other postretirement costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 163 | 172
Fermi 2 asset retirement obligation |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 952 | 972
Removal costs asset |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 223 | 19
Enhanced tree trimming program deferred costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 157 | 90
Recoverable Michigan income taxes |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 133 | 148
Energy Waste Reduction incentive |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 90 | 88
Recoverable income taxes related to AFUDC equity |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 89 | 76
Accrued PSCR/GCR revenue |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 55 | 450
Deferred environmental costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 46 | 46
Unamortized loss on reacquired debt |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 41 | 45
Customer360 deferred costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 38 | 42
Advanced distribution management system costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 18 | 14
Deferred pension costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 16 | 63
Nuclear performance evaluation and review committee tracker |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 6 | 26
Other |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 133 | 129
DTE Electric |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 5,695 | 3,640
Less amount included in Current Assets | (99) | (421)
Regulatory assets, noncurrent | 5,596 | 3,219
Securitized regulatory assets | 758 | 206
DTE Electric | Recoverable undepreciated costs on retiring plants |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 2,736 | 594
DTE Electric | Pension |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 1,045 | 997
DTE Electric | Other postretirement costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 67 | 60
DTE Electric | Fermi 2 asset retirement obligation |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 952 | 972
DTE Electric | Removal costs asset |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 223 | 19
DTE Electric | Enhanced tree trimming program deferred costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 157 | 90
DTE Electric | Recoverable Michigan income taxes |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 110 | 121
DTE Electric | Energy Waste Reduction incentive |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 72 | 71
DTE Electric | Recoverable income taxes related to AFUDC equity |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 80 | 68
DTE Electric | Accrued PSCR/GCR revenue |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 55 | 421
DTE Electric | Deferred environmental costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 0 | 0
DTE Electric | Unamortized loss on reacquired debt |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 31 | 34
DTE Electric | Customer360 deferred costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 38 | 42
DTE Electric | Advanced distribution management system costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 18 | 14
DTE Electric | Deferred pension costs |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 10 | 41
DTE Electric | Nuclear performance evaluation and review committee tracker |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | 6 | 26
DTE Electric | Other |  |
Regulatory Assets [Line Items] |  |
Regulatory assets | $ 95 | $ 70

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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 + Details
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