v3.25.2
Fair Value (Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative assets    
Total derivative assets, gross $ 711 $ 694
Total derivative asset, netting (527) (447)
Derivative liabilities    
Total derivative liabilities, gross (627) (605)
Total derivative liability, netting 486 430
DTE Electric    
Assets    
Nuclear decommissioning trusts 2,345 2,256
Current liabilities    
Derivative liabilities    
Total derivative liabilities, gross (381) (441)
Noncurrent liabilities    
Derivative liabilities    
Total derivative liabilities, gross (246) (164)
Natural gas    
Derivative assets    
Total derivative assets, gross 327 428
Total derivative asset, netting (249) (285)
Derivative liabilities    
Total derivative liabilities, gross (321) (410)
Total derivative liability, netting 225 272
Electricity    
Derivative assets    
Total derivative assets, gross 253 187
Total derivative asset, netting (179) (116)
Derivative liabilities    
Total derivative liabilities, gross (225) (150)
Total derivative liability, netting 182 114
Environmental & Other    
Derivative assets    
Total derivative assets, gross 129 58
Total derivative asset, netting (99) (46)
Derivative liabilities    
Total derivative liabilities, gross (79) (44)
Total derivative liability, netting 79 44
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 25 26
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 346 349
Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 235 228
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,080 1,003
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 659 650
Recurring    
Assets    
Cash equivalents 9 11
Derivative assets    
Total derivative asset, netting (527) (447)
Total derivative assets, net balance 184 247
Total Assets 2,652 2,622
Derivative liabilities    
Total derivative liability, netting 486 430
Total Liabilities (141) (175)
Net Assets (Liabilities) at end of period 2,511 2,447
Net Assets at end of period, netting (41) (17)
Recurring | DTE Electric    
Assets    
Cash equivalents 8 8
Derivative assets    
Total Assets 2,430 2,318
Recurring | Current assets    
Derivative assets    
Total derivative asset, netting (343) (326)
Total Assets 128 173
Recurring | Current assets | DTE Electric    
Derivative assets    
Total Assets 38 17
Recurring | Noncurrent assets    
Derivative assets    
Total derivative asset, netting (184) (121)
Total Assets 2,524 2,449
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total Assets 2,392 2,301
Recurring | Current liabilities    
Derivative liabilities    
Total derivative liability, netting 324 323
Total Liabilities (57) (118)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Total derivative liability, netting 162 107
Total Liabilities (84) (57)
Recurring | Restricted cash    
Assets    
Cash equivalents 8 8
Recurring | Restricted cash | DTE Electric    
Assets    
Cash equivalents 8 8
Recurring | Natural gas    
Derivative assets    
Total derivative asset, netting (249) (285)
Total derivative assets, net balance 78 143
Derivative liabilities    
Total derivative liability, netting 225 272
Total derivative liabilities, net balance (96) (138)
Recurring | Electricity    
Derivative assets    
Total derivative asset, netting (179) (116)
Total derivative assets, net balance 74 71
Derivative liabilities    
Total derivative liability, netting 182 114
Total derivative liabilities, net balance (43) (36)
Recurring | Environmental & Other    
Derivative assets    
Total derivative asset, netting (99) (46)
Total derivative assets, net balance 30 12
Derivative liabilities    
Total derivative liability, netting 79 44
Total derivative liabilities, net balance 0 0
Recurring | Other contracts    
Derivative assets    
Total derivative assets, net balance 2 21
Derivative liabilities    
Total derivative liabilities, net balance (2) (1)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Total derivative assets, net balance 30 9
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 25 26
Other investments 31 29
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 25 26
Other investments 19 19
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 346 349
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 346 349
Recurring | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 235 228
Recurring | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 235 228
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 1,080 1,003
Other investments 75 72
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,080 1,003
Other investments 28 26
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 659 650
Other investments 8 7
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 659 650
Recurring | Level 1    
Assets    
Cash equivalents 9 11
Derivative assets    
Total derivative assets, gross 320 310
Total Assets 1,743 1,602
Derivative liabilities    
Total Liabilities (300) (290)
Net Assets (Liabilities) at end of period 1,443 1,312
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 8 8
Derivative assets    
Total Assets 1,355 1,226
Recurring | Level 1 | Current assets    
Derivative assets    
Total Assets 221 223
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total Assets 8 8
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total Assets 1,522 1,379
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total Assets 1,347 1,218
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Total Liabilities (198) (219)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Total Liabilities (102) (71)
Recurring | Level 1 | Natural gas    
Derivative assets    
Total derivative assets, gross 202 242
Derivative liabilities    
Total derivative liabilities, gross (179) (217)
Recurring | Level 1 | Electricity    
Derivative assets    
Total derivative assets, gross 103 67
Derivative liabilities    
Total derivative liabilities, gross (109) (71)
Recurring | Level 1 | Environmental & Other    
Derivative assets    
Total derivative assets, gross 15 1
Derivative liabilities    
Total derivative liabilities, gross (12) (2)
Recurring | Level 1 | Other contracts    
Derivative assets    
Total derivative assets, gross 0 0
Derivative liabilities    
Total derivative liabilities, gross 0 0
Recurring | Level 1 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Total derivative assets, net balance 0 0
Recurring | Level 1 | Cash equivalents    
Assets    
Nuclear decommissioning trusts 25 26
Other investments 31 29
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 25 26
Other investments 19 19
Recurring | Level 1 | Private equity and other    
Assets    
Nuclear decommissioning trusts 15 16
Recurring | Level 1 | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 15 16
Recurring | Level 1 | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 218 151
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 218 151
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 921 856
Other investments 75 72
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 921 856
Other investments 28 26
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 121 124
Other investments 8 7
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 121 124
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Total derivative assets, gross 225 218
Total Assets 673 648
Derivative liabilities    
Total Liabilities (175) (162)
Net Assets (Liabilities) at end of period 498 486
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total Assets 448 430
Recurring | Level 2 | Current assets    
Derivative assets    
Total Assets 136 170
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total Assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total Assets 537 478
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total Assets 448 430
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Total Liabilities (111) (129)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Total Liabilities (64) (33)
Recurring | Level 2 | Natural gas    
Derivative assets    
Total derivative assets, gross 30 81
Derivative liabilities    
Total derivative liabilities, gross (38) (70)
Recurring | Level 2 | Electricity    
Derivative assets    
Total derivative assets, gross 110 69
Derivative liabilities    
Total derivative liabilities, gross (68) (52)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Total derivative assets, gross 83 47
Derivative liabilities    
Total derivative liabilities, gross (67) (39)
Recurring | Level 2 | Other contracts    
Derivative assets    
Total derivative assets, gross 2 21
Derivative liabilities    
Total derivative liabilities, gross (2) (1)
Recurring | Level 2 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Total derivative assets, net balance 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 17 16
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 17 16
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 431 414
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 431 414
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Total derivative assets, gross 166 166
Total Assets 166 166
Derivative liabilities    
Total Liabilities (152) (153)
Net Assets (Liabilities) at end of period 14 13
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total Assets 30 9
Recurring | Level 3 | Current assets    
Derivative assets    
Total Assets 114 106
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total Assets 30 9
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total Assets 52 60
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total Assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Total Liabilities (72) (93)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Total Liabilities (80) (60)
Recurring | Level 3 | Natural gas    
Derivative assets    
Total derivative assets, gross 95 105
Derivative liabilities    
Total derivative liabilities, gross (104) (123)
Recurring | Level 3 | Electricity    
Derivative assets    
Total derivative assets, gross 40 51
Derivative liabilities    
Total derivative liabilities, gross (48) (27)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Total derivative assets, gross 31 10
Derivative liabilities    
Total derivative liabilities, gross 0 (3)
Recurring | Level 3 | Other contracts    
Derivative assets    
Total derivative assets, gross 0 0
Derivative liabilities    
Total derivative liabilities, gross 0 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Total derivative assets, net balance 30 9
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 597 653
Derivative liabilities    
Net Assets (Liabilities) at end of period 597 653
Recurring | Other | DTE Electric    
Derivative assets    
Total Assets 597 653
Recurring | Other | Noncurrent assets    
Derivative assets    
Total Assets 597 653
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total Assets 597 653
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 331 333
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 331 333
Recurring | Other | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 0 61
Recurring | Other | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 61
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 159 147
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 159 147
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 107 112
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 107 $ 112