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Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Derivative assets    
Derivative assets, gross $ 2,377 $ 1,391
Derivative asset, netting (1,911) (1,120)
Derivative assets, net 466 271
Derivative liabilities    
Derivative liabilities, gross (2,562) (1,508)
Derivative liability, netting 1,829 1,078
Derivative liabilities, net (733) (430)
DTE Electric    
Assets    
Nuclear decommissioning trusts 2,010 2,071
Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (1,868) (1,037)
Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (694) (471)
Natural gas    
Derivative assets    
Derivative assets, gross 711 454
Derivative asset, netting (679) (394)
Derivative assets, net 32 60
Derivative liabilities    
Derivative liabilities, gross (905) (594)
Derivative liability, netting 553 347
Derivative liabilities, net (352) (247)
Electricity    
Derivative assets    
Derivative assets, gross 1,334 643
Derivative asset, netting (905) (441)
Derivative assets, net 429 202
Derivative liabilities    
Derivative liabilities, gross (1,325) (622)
Derivative liability, netting 950 443
Derivative liabilities, net (375) (179)
Environmental & Other    
Derivative assets    
Derivative assets, gross 332 294
Derivative asset, netting (327) (285)
Derivative assets, net 5 9
Derivative liabilities    
Derivative liabilities, gross (326) (288)
Derivative liability, netting 326 288
Derivative liabilities, net 0 0
Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross (6) (4)
Derivative liability, netting 0 0
Derivative liabilities, net (6) (4)
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 37 39
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 236 205
Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 95 76
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,033 1,107
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 609 644
Recurring    
Assets    
Cash equivalents 123 4
Derivative assets    
Derivative asset, netting (1,911) (1,120)
Derivative assets, net 466 271
Total assets 2,742 2,507
Derivative liabilities    
Derivative liability, netting 1,829 1,078
Derivative liabilities, net (733) (430)
Net Assets (Liabilities) at end of period 2,009 2,077
Net Assets at end of period, netting (82) (42)
Recurring | DTE Electric    
Assets    
Cash equivalents 38 0
Derivative assets    
Total assets 2,082 2,111
Recurring | Current assets    
Derivative assets    
Derivative asset, netting (1,524) (854)
Total assets 475 185
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 41 9
Recurring | Noncurrent assets    
Derivative assets    
Derivative asset, netting (387) (266)
Total assets 2,267 2,322
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 2,041 2,102
Recurring | Current liabilities    
Derivative liabilities    
Derivative liability, netting 1,415 799
Derivative liabilities, net (453) (238)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Derivative liability, netting 414 279
Derivative liabilities, net (280) (192)
Recurring | Restricted cash    
Assets    
Cash equivalents 3 1
Recurring | Restricted cash | DTE Electric    
Assets    
Cash equivalents 1  
Recurring | Natural gas    
Derivative assets    
Derivative asset, netting (679) (394)
Derivative assets, net 32 60
Derivative liabilities    
Derivative liability, netting 553 347
Derivative liabilities, net (352) (247)
Recurring | Electricity    
Derivative assets    
Derivative asset, netting (905) (441)
Derivative assets, net 429 202
Derivative liabilities    
Derivative liability, netting 950 443
Derivative liabilities, net (375) (179)
Recurring | Environmental & Other    
Derivative assets    
Derivative asset, netting (327) (285)
Derivative assets, net 5 9
Derivative liabilities    
Derivative liability, netting 326 288
Derivative liabilities, net 0 0
Recurring | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liability, netting 0 0
Derivative liabilities, net (6) (4)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 3 9
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 37 39
Other investments 71 86
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 37 39
Other investments 11 11
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 236 205
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 236 205
Recurring | Hedge funds and similar investments    
Assets    
Nuclear decommissioning trusts 95 76
Recurring | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 95 76
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 1,033 1,107
Other investments 65 68
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,033 1,107
Other investments 20 20
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 609 644
Other investments 7 7
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 609 644
Recurring | Level 1    
Assets    
Cash equivalents 123 4
Derivative assets    
Derivative assets, gross 505 273
Total assets 1,836 1,576
Derivative liabilities    
Derivative liabilities, gross (232) (177)
Net Assets (Liabilities) at end of period 1,604 1,399
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 38 0
Derivative assets    
Total assets 1,134 1,169
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 532 227
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 38 0
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,304 1,349
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,096 1,169
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (218) (168)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (14) (9)
Recurring | Level 1 | Natural gas    
Derivative assets    
Derivative assets, gross 505 273
Derivative liabilities    
Derivative liabilities, gross (232) (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 37 39
Other investments 71 86
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 37 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 65 58
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 65 58
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 851 917
Other investments 65 68
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 851 917
Other investments 20 20
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 112 124
Other investments 7 7
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 112 124
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 1,466 900
Total assets 1,894 1,336
Derivative liabilities    
Derivative liabilities, gross (1,583) (898)
Net Assets (Liabilities) at end of period 311 438
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 428 436
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 1,128 646
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 766 690
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 428 436
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (1,165) (609)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (418) (289)
Recurring | Level 2 | Natural gas    
Derivative assets    
Derivative assets, gross 135 115
Derivative liabilities    
Derivative liabilities, gross (372) (172)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 1,006 500
Derivative liabilities    
Derivative liabilities, gross (880) (434)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 325 285
Derivative liabilities    
Derivative liabilities, gross (325) (288)
Recurring | Level 2 | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross (6) (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 30 18
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 30 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 398 418
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 398 418
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 406 218
Total assets 406 218
Derivative liabilities    
Derivative liabilities, gross (747) (433)
Net Assets (Liabilities) at end of period (341) (215)
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 3 9
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 339 166
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 3 9
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 67 52
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (485) (260)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (262) (173)
Recurring | Level 3 | Natural gas    
Derivative assets    
Derivative assets, gross 71 66
Derivative liabilities    
Derivative liabilities, gross (301) (245)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 328 143
Derivative liabilities    
Derivative liabilities, gross (445) (188)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 7 9
Derivative liabilities    
Derivative liabilities, gross (1) 0
Recurring | Level 3 | Foreign currency exchange contracts    
Derivative liabilities    
Derivative liabilities, gross 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 3 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 517 497
Derivative liabilities    
Net Assets (Liabilities) at end of period 517 497
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 517 497
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 517 497
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 517 497
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 236 205
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 236 205
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 182 190
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 182 190
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 99 102
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 99 $ 102