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Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative assets |  |
Derivative assets, gross | $ 694 | $ 1,197
Derivative assets, netting | (447) | (791)
Derivative liabilities |  |
Derivative liabilities, gross | (605) | (1,172)
Derivative liabilities, netting | 430 | 863
DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 2,256 | 2,041
Current liabilities |  |
Derivative liabilities |  |
Derivative liabilities, gross | (441) | (847)
Noncurrent liabilities |  |
Derivative liabilities |  |
Derivative liabilities, gross | (164) | (325)
Natural Gas |  |
Derivative assets |  |
Derivative assets, gross | 428 | 637
Derivative assets, netting | (285) | (416)
Derivative liabilities |  |
Derivative liabilities, gross | (410) | (615)
Derivative liabilities, netting | 272 | 429
Electricity |  |
Derivative assets |  |
Derivative assets, gross | 187 | 421
Derivative assets, netting | (116) | (243)
Derivative liabilities |  |
Derivative liabilities, gross | (150) | (388)
Derivative liabilities, netting | 114 | 297
Environmental & Other |  |
Derivative assets |  |
Derivative assets, gross | 58 | 139
Derivative assets, netting | (46) | (132)
Derivative liabilities |  |
Derivative liabilities, gross | (44) | (150)
Derivative liabilities, netting | 44 | 137
Cash equivalents | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 26 | 34
Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 349 | 312
Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 228 | 184
Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 1,003 | 921
Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 650 | 590
Recurring |  |
Assets |  |
Cash equivalents | 11 | 13
Derivative assets |  |
Derivative assets, netting | (447) | (791)
Derivative assets, net | 247 | 406
Total assets | 2,622 | 2,562
Derivative liabilities |  |
Derivative liabilities, netting | 430 | 863
Total Liabilities | (175) | (309)
Net Assets (Liabilities) at end of period | 2,447 | 2,253
Net Assets (Liabilities) at the end of the period, netting | (17) | 72
Recurring | DTE Electric |  |
Assets |  |
Cash equivalents | 8 | 11
Derivative assets |  |
Total assets | 2,318 | 2,091
Recurring | Current assets |  |
Derivative assets |  |
Derivative assets, netting | (326) | (613)
Total assets | 173 | 310
Recurring | Current assets | DTE Electric |  |
Derivative assets |  |
Total assets | 17 | 18
Recurring | Noncurrent assets |  |
Derivative assets |  |
Derivative assets, netting | (121) | (178)
Total assets | 2,449 | 2,252
Recurring | Noncurrent assets | DTE Electric |  |
Derivative assets |  |
Total assets | 2,301 | 2,073
Recurring | Current liabilities |  |
Derivative liabilities |  |
Derivative liabilities, netting | 323 | 670
Total Liabilities | (118) | (177)
Recurring | Noncurrent liabilities |  |
Derivative liabilities |  |
Derivative liabilities, netting | 107 | 193
Total Liabilities | (57) | (132)
Recurring | Restricted cash |  |
Assets |  |
Cash equivalents | 8 | 11
Recurring | Restricted cash | DTE Electric |  |
Assets |  |
Cash equivalents | 8 | 11
Recurring | Natural Gas |  |
Derivative assets |  |
Derivative assets, netting | (285) | (416)
Derivative assets, net | 143 | 221
Derivative liabilities |  |
Derivative liabilities, netting | 272 | 429
Derivative liabilities, net | (138) | (186)
Recurring | Electricity |  |
Derivative assets |  |
Derivative assets, netting | (116) | (243)
Derivative assets, net | 71 | 178
Derivative liabilities |  |
Derivative liabilities, netting | 114 | 297
Derivative liabilities, net | (36) | (91)
Recurring | Environmental & Other |  |
Derivative assets |  |
Derivative assets, netting | (46) | (132)
Derivative assets, net | 12 | 7
Derivative liabilities |  |
Derivative liabilities, netting | 44 | 137
Derivative liabilities, net | 0 | (13)
Recurring | Other contracts |  |
Derivative assets |  |
Derivative assets, netting | 0 | 0
Derivative assets, net | 21 | 0
Derivative liabilities |  |
Derivative liabilities, netting | 0 | 0
Derivative liabilities, net | (1) | (19)
Recurring | Derivative assets — FTRs | DTE Electric |  |
Derivative assets |  |
Derivative assets, net | 9 | 7
Recurring | Cash equivalents |  |
Assets |  |
Nuclear decommissioning trusts | 26 | 34
Other investments | 29 | 37
Recurring | Cash equivalents | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 26 | 34
Other investments | 19 | 11
Recurring | Private equity and other |  |
Assets |  |
Nuclear decommissioning trusts | 349 | 312
Recurring | Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 349 | 312
Recurring | Hedge Funds and Similar Investments |  |
Assets |  |
Nuclear decommissioning trusts | 228 | 184
Recurring | Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 228 | 184
Recurring | Equity securities |  |
Assets |  |
Nuclear decommissioning trusts | 1,003 | 921
Other investments | 72 | 58
Recurring | Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 1,003 | 921
Other investments | 26 | 21
Recurring | Fixed income securities |  |
Assets |  |
Nuclear decommissioning trusts | 650 | 590
Other investments | 7 | 7
Recurring | Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 650 | 590
Recurring | Level 1 |  |
Assets |  |
Cash equivalents | 11 | 13
Derivative assets |  |
Derivative assets, gross | 310 | 241
Total assets | 1,602 | 1,412
Derivative liabilities |  |
Total Liabilities | (290) | (291)
Net Assets (Liabilities) at end of period | 1,312 | 1,121
Recurring | Level 1 | DTE Electric |  |
Assets |  |
Cash equivalents | 8 | 11
Derivative assets |  |
Total assets | 1,226 | 1,099
Recurring | Level 1 | Current assets |  |
Derivative assets |  |
Total assets | 223 | 215
Recurring | Level 1 | Current assets | DTE Electric |  |
Derivative assets |  |
Total assets | 8 | 11
Recurring | Level 1 | Noncurrent assets |  |
Derivative assets |  |
Total assets | 1,379 | 1,197
Recurring | Level 1 | Noncurrent assets | DTE Electric |  |
Derivative assets |  |
Total assets | 1,218 | 1,088
Recurring | Level 1 | Current liabilities |  |
Derivative liabilities |  |
Total Liabilities | (219) | (240)
Recurring | Level 1 | Noncurrent liabilities |  |
Derivative liabilities |  |
Total Liabilities | (71) | (51)
Recurring | Level 1 | Natural Gas |  |
Derivative assets |  |
Derivative assets, gross | 242 | 241
Derivative liabilities |  |
Derivative liabilities, gross | (217) | (291)
Recurring | Level 1 | Electricity |  |
Derivative assets |  |
Derivative assets, gross | 67 | 0
Derivative liabilities |  |
Derivative liabilities, gross | (71) | 0
Recurring | Level 1 | Environmental & Other |  |
Derivative assets |  |
Derivative assets, gross | 1 | 0
Derivative liabilities |  |
Derivative liabilities, gross | (2) | 0
Recurring | Level 1 | Other contracts |  |
Derivative assets |  |
Derivative assets, gross | 0 | 0
Derivative liabilities |  |
Derivative liabilities, gross | 0 | 0
Recurring | Level 1 | Derivative assets — FTRs | DTE Electric |  |
Derivative assets |  |
Derivative assets, net | 0 | 0
Recurring | Level 1 | Cash equivalents |  |
Assets |  |
Nuclear decommissioning trusts | 26 | 34
Other investments | 29 | 37
Recurring | Level 1 | Cash equivalents | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 26 | 34
Other investments | 19 | 11
Recurring | Level 1 | Private equity and other |  |
Assets |  |
Nuclear decommissioning trusts | 16 | 0
Recurring | Level 1 | Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 16 | 0
Recurring | Level 1 | Hedge Funds and Similar Investments |  |
Assets |  |
Nuclear decommissioning trusts | 151 | 119
Recurring | Level 1 | Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 151 | 119
Recurring | Level 1 | Equity securities |  |
Assets |  |
Nuclear decommissioning trusts | 856 | 776
Other investments | 72 | 58
Recurring | Level 1 | Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 856 | 776
Other investments | 26 | 21
Recurring | Level 1 | Fixed income securities |  |
Assets |  |
Nuclear decommissioning trusts | 124 | 127
Other investments | 7 | 7
Recurring | Level 1 | Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 124 | 127
Recurring | Level 2 |  |
Assets |  |
Cash equivalents | 0 | 0
Derivative assets |  |
Derivative assets, gross | 218 | 606
Total assets | 648 | 1,042
Derivative liabilities |  |
Total Liabilities | (162) | (606)
Net Assets (Liabilities) at end of period | 486 | 436
Recurring | Level 2 | DTE Electric |  |
Assets |  |
Cash equivalents | 0 | 0
Derivative assets |  |
Total assets | 430 | 436
Recurring | Level 2 | Current assets |  |
Derivative assets |  |
Total assets | 170 | 461
Recurring | Level 2 | Current assets | DTE Electric |  |
Derivative assets |  |
Total assets | 0 | 0
Recurring | Level 2 | Noncurrent assets |  |
Derivative assets |  |
Total assets | 478 | 581
Recurring | Level 2 | Noncurrent assets | DTE Electric |  |
Derivative assets |  |
Total assets | 430 | 436
Recurring | Level 2 | Current liabilities |  |
Derivative liabilities |  |
Total Liabilities | (129) | (462)
Recurring | Level 2 | Noncurrent liabilities |  |
Derivative liabilities |  |
Total Liabilities | (33) | (144)
Recurring | Level 2 | Natural Gas |  |
Derivative assets |  |
Derivative assets, gross | 81 | 217
Derivative liabilities |  |
Derivative liabilities, gross | (70) | (167)
Recurring | Level 2 | Electricity |  |
Derivative assets |  |
Derivative assets, gross | 69 | 258
Derivative liabilities |  |
Derivative liabilities, gross | (52) | (272)
Recurring | Level 2 | Environmental & Other |  |
Derivative assets |  |
Derivative assets, gross | 47 | 131
Derivative liabilities |  |
Derivative liabilities, gross | (39) | (148)
Recurring | Level 2 | Other contracts |  |
Derivative assets |  |
Derivative assets, gross | 21 | 0
Derivative liabilities |  |
Derivative liabilities, gross | (1) | (19)
Recurring | Level 2 | Derivative assets — FTRs | DTE Electric |  |
Derivative assets |  |
Derivative assets, net | 0 | 0
Recurring | Level 2 | Cash equivalents |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 2 | Cash equivalents | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 2 | Private equity and other |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 2 | Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 2 | Hedge Funds and Similar Investments |  |
Assets |  |
Nuclear decommissioning trusts | 16 | 65
Recurring | Level 2 | Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 16 | 65
Recurring | Level 2 | Equity securities |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 2 | Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 2 | Fixed income securities |  |
Assets |  |
Nuclear decommissioning trusts | 414 | 371
Other investments | 0 | 0
Recurring | Level 2 | Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 414 | 371
Recurring | Level 3 |  |
Assets |  |
Cash equivalents | 0 | 0
Derivative assets |  |
Derivative assets, gross | 166 | 350
Total assets | 166 | 350
Derivative liabilities |  |
Total Liabilities | (153) | (275)
Net Assets (Liabilities) at end of period | 13 | 75
Recurring | Level 3 | DTE Electric |  |
Assets |  |
Cash equivalents | 0 | 0
Derivative assets |  |
Total assets | 9 | 7
Recurring | Level 3 | Current assets |  |
Derivative assets |  |
Total assets | 106 | 247
Recurring | Level 3 | Current assets | DTE Electric |  |
Derivative assets |  |
Total assets | 9 | 7
Recurring | Level 3 | Noncurrent assets |  |
Derivative assets |  |
Total assets | 60 | 103
Recurring | Level 3 | Noncurrent assets | DTE Electric |  |
Derivative assets |  |
Total assets | 0 | 0
Recurring | Level 3 | Current liabilities |  |
Derivative liabilities |  |
Total Liabilities | (93) | (145)
Recurring | Level 3 | Noncurrent liabilities |  |
Derivative liabilities |  |
Total Liabilities | (60) | (130)
Recurring | Level 3 | Natural Gas |  |
Derivative assets |  |
Derivative assets, gross | 105 | 179
Derivative liabilities |  |
Derivative liabilities, gross | (123) | (157)
Recurring | Level 3 | Electricity |  |
Derivative assets |  |
Derivative assets, gross | 51 | 163
Derivative liabilities |  |
Derivative liabilities, gross | (27) | (116)
Recurring | Level 3 | Environmental & Other |  |
Derivative assets |  |
Derivative assets, gross | 10 | 8
Derivative liabilities |  |
Derivative liabilities, gross | (3) | (2)
Recurring | Level 3 | Other contracts |  |
Derivative assets |  |
Derivative assets, gross | 0 | 0
Derivative liabilities |  |
Derivative liabilities, gross | 0 | 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric |  |
Derivative assets |  |
Derivative assets, net | 9 | 7
Recurring | Level 3 | Cash equivalents |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 3 | Cash equivalents | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 3 | Private equity and other |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 3 | Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 3 | Hedge Funds and Similar Investments |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 3 | Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Level 3 | Equity securities |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 3 | Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 3 | Fixed income securities |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Other investments | 0 | 0
Recurring | Level 3 | Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 0 | 0
Recurring | Other |  |
Derivative assets |  |
Total assets | 653 | 549
Derivative liabilities |  |
Net Assets (Liabilities) at end of period | 653 | 549
Recurring | Other | DTE Electric |  |
Derivative assets |  |
Total assets | 653 | 549
Recurring | Other | Noncurrent assets |  |
Derivative assets |  |
Total assets | 653 | 549
Recurring | Other | Noncurrent assets | DTE Electric |  |
Derivative assets |  |
Total assets | 653 | 549
Recurring | Other | Private equity and other |  |
Assets |  |
Nuclear decommissioning trusts | 333 | 312
Recurring | Other | Private equity and other | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 333 | 312
Recurring | Other | Hedge Funds and Similar Investments |  |
Assets |  |
Nuclear decommissioning trusts | 61 | 0
Recurring | Other | Hedge Funds and Similar Investments | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 61 | 0
Recurring | Other | Equity securities |  |
Assets |  |
Nuclear decommissioning trusts | 147 | 145
Recurring | Other | Equity securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | 147 | 145
Recurring | Other | Fixed income securities |  |
Assets |  |
Nuclear decommissioning trusts | 112 | 92
Recurring | Other | Fixed income securities | DTE Electric |  |
Assets |  |
Nuclear decommissioning trusts | $ 112 | $ 92

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