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Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Derivative assets    
Derivative assets, gross $ 2,754 $ 1,391
Derivative asset, netting (2,236) (1,120)
Derivative liabilities    
Derivative liabilities, gross (2,996) (1,508)
Derivative liability, netting 2,242 1,078
DTE Electric    
Assets    
Nuclear decommissioning trusts 1,764 2,071
Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (2,282) (1,037)
Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (714) (471)
Natural gas    
Derivative assets    
Derivative assets, gross 891 454
Derivative asset, netting (852) (394)
Derivative liabilities    
Derivative liabilities, gross (1,193) (594)
Derivative liability, netting 772 347
Electricity    
Derivative assets    
Derivative assets, gross 1,622 643
Derivative asset, netting (1,160) (441)
Derivative liabilities    
Derivative liabilities, gross (1,577) (622)
Derivative liability, netting 1,244 443
Environmental & Other    
Derivative assets    
Derivative assets, gross 238 294
Derivative asset, netting (224) (285)
Derivative liabilities    
Derivative liabilities, gross (225) (288)
Derivative liability, netting 226 288
Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 3 0
Derivative asset, netting 0 0
Derivative liabilities    
Derivative liabilities, gross (1) (4)
Derivative liability, netting 0 0
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 29 39
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 259 205
Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 118 76
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 808 1,107
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 550 644
Recurring    
Assets    
Cash equivalents 26 4
Derivative assets    
Derivative asset, netting (2,236) (1,120)
Derivative assets, net 518 271
Total assets 2,438 2,507
Derivative liabilities    
Derivative liability, netting 2,242 1,078
Derivative liabilities, net (754) (430)
Net Assets (Liabilities) at end of period 1,684 2,077
Net Assets (Liabilities) at end of period, netting 6 (42)
Recurring | DTE Electric    
Assets    
Cash equivalents 23 0
Derivative assets    
Total assets 1,829 2,111
Recurring | Current assets    
Derivative assets    
Derivative asset, netting (1,814) (854)
Total assets 421 185
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 39 9
Recurring | Noncurrent assets    
Derivative assets    
Derivative asset, netting (422) (266)
Total assets 2,017 2,322
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,790 2,102
Recurring | Current liabilities    
Derivative liabilities    
Derivative liability, netting 1,784 799
Derivative liabilities, net (498) (238)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Derivative liability, netting 458 279
Derivative liabilities, net (256) (192)
Recurring | Restricted cash    
Assets    
Cash equivalents 25 1
Recurring | Restricted cash | DTE Electric    
Assets    
Cash equivalents 23  
Recurring | Natural gas    
Derivative assets    
Derivative asset, netting (852) (394)
Derivative assets, net 39 60
Derivative liabilities    
Derivative liability, netting 772 347
Derivative liabilities, net (421) (247)
Recurring | Electricity    
Derivative assets    
Derivative asset, netting (1,160) (441)
Derivative assets, net 462 202
Derivative liabilities    
Derivative liability, netting 1,244 443
Derivative liabilities, net (333) (179)
Recurring | Environmental & Other    
Derivative assets    
Derivative asset, netting (224) (285)
Derivative assets, net 14 9
Derivative liabilities    
Derivative liability, netting 226 288
Derivative liabilities, net 1 0
Recurring | Foreign currency exchange contracts    
Derivative assets    
Derivative asset, netting 0 0
Derivative assets, net 3 0
Derivative liabilities    
Derivative liability, netting 0 0
Derivative liabilities, net (1) (4)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 16 9
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 29 39
Other investments 71 86
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 29 39
Other investments 11 11
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 259 205
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 259 205
Recurring | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 118 76
Recurring | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 118 76
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 808 1,107
Other investments 52 68
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 808 1,107
Other investments 15 20
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 550 644
Other investments 7 7
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 550 644
Recurring | Level 1    
Assets    
Cash equivalents 26 4
Derivative assets    
Derivative assets, gross 554 273
Total assets 1,571 1,576
Derivative liabilities    
Derivative liabilities, gross (293) (177)
Net Assets (Liabilities) at end of period 1,278 1,399
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 23 0
Derivative assets    
Total assets 910 1,169
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 453 227
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 23 0
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,118 1,349
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 887 1,169
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (263) (168)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (30) (9)
Recurring | Level 1 | Natural gas    
Derivative assets    
Derivative assets, gross 554 273
Derivative liabilities    
Derivative liabilities, gross (293) (177)
Recurring | Level 1 | Electricity    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Environmental & Other    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Foreign currency exchange 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 29 39
Other investments 71 86
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 29 39
Other investments 11 11
Recurring | Level 1 | Private equity and other    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 1 | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 1 | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 77 58
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 77 58
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 653 917
Other investments 52 68
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 653 917
Other investments 15 20
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 102 124
Other investments 7 7
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 102 124
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 1,643 900
Total assets 2,041 1,336
Derivative liabilities    
Derivative liabilities, gross (1,772) (898)
Net Assets (Liabilities) at end of period 269 438
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 398 436
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 1,340 646
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 701 690
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 398 436
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (1,382) (609)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (390) (289)
Recurring | Level 2 | Natural gas    
Derivative assets    
Derivative assets, gross 233 115
Derivative liabilities    
Derivative liabilities, gross (483) (172)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 1,185 500
Derivative liabilities    
Derivative liabilities, gross (1,064) (434)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 222 285
Derivative liabilities    
Derivative liabilities, gross (224) (288)
Recurring | Level 2 | Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 3 0
Derivative liabilities    
Derivative liabilities, gross (1) (4)
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 41 18
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 41 18
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 357 418
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 357 418
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 557 218
Total assets 557 218
Derivative liabilities    
Derivative liabilities, gross (931) (433)
Net Assets (Liabilities) at end of period (374) (215)
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 16 9
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 442 166
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 16 9
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 115 52
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (637) (260)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (294) (173)
Recurring | Level 3 | Natural gas    
Derivative assets    
Derivative assets, gross 104 66
Derivative liabilities    
Derivative liabilities, gross (417) (245)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 437 143
Derivative liabilities    
Derivative liabilities, gross (513) (188)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 16 9
Derivative liabilities    
Derivative liabilities, gross (1) 0
Recurring | Level 3 | Foreign currency exchange 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 16 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 505 497
Derivative liabilities    
Net Assets (Liabilities) at end of period 505 497
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 505 497
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 505 497
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 505 497
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 259 205
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 259 205
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 155 190
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 155 190
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 91 102
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 91 $ 102