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Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Derivative assets    
Derivative assets, gross $ 3,229 $ 1,391
Derivative asset, netting (2,753) (1,120)
Derivative liabilities    
Derivative liabilities, gross (3,530) (1,508)
Derivative liability, netting 2,810 1,078
DTE Electric    
Assets    
Nuclear decommissioning trusts 1,837 2,071
Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (2,653) (1,037)
Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (877) (471)
Natural gas    
Derivative assets    
Derivative assets, gross 902 454
Derivative asset, netting (883) (394)
Derivative liabilities    
Derivative liabilities, gross (1,266) (594)
Derivative liability, netting 766 347
Electricity    
Derivative assets    
Derivative assets, gross 1,960 643
Derivative asset, netting (1,529) (441)
Derivative liabilities    
Derivative liabilities, gross (1,918) (622)
Derivative liability, netting 1,700 443
Environmental & Other    
Derivative assets    
Derivative assets, gross 367 294
Derivative asset, netting (341) (285)
Derivative liabilities    
Derivative liabilities, gross (343) (288)
Derivative liability, netting 344 288
Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross (3) (4)
Derivative liability, netting 0 0
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 20 39
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 252 205
Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 126 76
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 855 1,107
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 584 644
Recurring    
Assets    
Cash equivalents 55 4
Derivative assets    
Derivative asset, netting (2,753) (1,120)
Derivative assets, net 476 271
Total assets 2,501 2,507
Derivative liabilities    
Derivative liability, netting 2,810 1,078
Derivative liabilities, net (720) (430)
Net Assets (Liabilities) at end of period 1,781 2,077
Net Assets at end of period, netting 57 (42)
Recurring | DTE Electric    
Assets    
Cash equivalents 9 0
Derivative assets    
Total assets 1,898 2,111
Recurring | Current assets    
Derivative assets    
Derivative asset, netting (2,211) (854)
Total assets 427 185
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 34 9
Recurring | Noncurrent assets    
Derivative assets    
Derivative asset, netting (542) (266)
Total assets 2,074 2,322
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,864 2,102
Recurring | Current liabilities    
Derivative liabilities    
Derivative liability, netting 2,217 799
Derivative liabilities, net (436) (238)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Derivative liability, netting 593 279
Derivative liabilities, net (284) (192)
Recurring | Restricted cash    
Assets    
Cash equivalents 11 1
Recurring | Restricted cash | DTE Electric    
Assets    
Cash equivalents 9  
Recurring | Natural gas    
Derivative assets    
Derivative asset, netting (883) (394)
Derivative assets, net 19 60
Derivative liabilities    
Derivative liability, netting 766 347
Derivative liabilities, net (500) (247)
Recurring | Electricity    
Derivative assets    
Derivative asset, netting (1,529) (441)
Derivative assets, net 431 202
Derivative liabilities    
Derivative liability, netting 1,700 443
Derivative liabilities, net (218) (179)
Recurring | Environmental & Other    
Derivative assets    
Derivative asset, netting (341) (285)
Derivative assets, net 26 9
Derivative liabilities    
Derivative liability, netting 344 288
Derivative liabilities, net 1 0
Recurring | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liability, netting 0 0
Derivative liabilities, net (3) (4)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 25 9
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 20 39
Other investments 70 86
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 20 39
Other investments 11 11
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 252 205
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 252 205
Recurring | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 126 76
Recurring | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 126 76
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 855 1,107
Other investments 56 68
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 855 1,107
Other investments 16 20
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 584 644
Other investments 7 7
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 584 644
Recurring | Level 1    
Assets    
Cash equivalents 55 4
Derivative assets    
Derivative assets, gross 583 273
Total assets 1,674 1,576
Derivative liabilities    
Derivative liabilities, gross (319) (177)
Net Assets (Liabilities) at end of period 1,355 1,399
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 9 0
Derivative assets    
Total assets 939 1,169
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 511 227
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 9 0
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,163 1,349
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 930 1,169
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (294) (168)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (25) (9)
Recurring | Level 1 | Natural gas    
Derivative assets    
Derivative assets, gross 583 273
Derivative liabilities    
Derivative liabilities, gross (319) (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 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 20 39
Other investments 70 86
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 20 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 80 58
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 80 58
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 699 917
Other investments 56 68
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 699 917
Other investments 16 20
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 104 124
Other investments 7 7
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 104 124
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 2,065 900
Total assets 2,497 1,336
Derivative liabilities    
Derivative liabilities, gross (2,202) (898)
Net Assets (Liabilities) at end of period 295 438
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 432 436
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 1,643 646
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 854 690
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 432 436
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (1,675) (609)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (527) (289)
Recurring | Level 2 | Natural gas    
Derivative assets    
Derivative assets, gross 212 115
Derivative liabilities    
Derivative liabilities, gross (478) (172)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 1,517 500
Derivative liabilities    
Derivative liabilities, gross (1,379) (434)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 336 285
Derivative liabilities    
Derivative liabilities, gross (342) (288)
Recurring | Level 2 | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross (3) (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 46 18
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 46 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 386 418
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 386 418
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 581 218
Total assets 581 218
Derivative liabilities    
Derivative liabilities, gross (1,009) (433)
Net Assets (Liabilities) at end of period (428) (215)
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 25 9
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 484 166
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 25 9
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 97 52
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (684) (260)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (325) (173)
Recurring | Level 3 | Natural gas    
Derivative assets    
Derivative assets, gross 107 66
Derivative liabilities    
Derivative liabilities, gross (469) (245)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 443 143
Derivative liabilities    
Derivative liabilities, gross (539) (188)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 31 9
Derivative liabilities    
Derivative liabilities, gross (1) 0
Recurring | Level 3 | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 25 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 502 497
Derivative liabilities    
Net Assets (Liabilities) at end of period 502 497
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 502 497
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 502 497
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 502 497
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 252 205
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 252 205
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 156 190
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 156 190
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 94 102
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 94 $ 102