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Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative assets    
Derivative assets, gross $ 1,391 $ 567
Derivative assets, netting (1,120) (411)
Derivative assets, net 271 156
Liabilities    
Derivative liabilities, gross (1,508) (533)
Derivative liabilities, netting 1,078 405
Derivative liabilities, net (430) (128)
DTE Electric    
Assets    
Nuclear decommissioning trusts 2,071 1,855
Current liabilities    
Liabilities    
Derivative liabilities, gross (1,037) (386)
Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (471) (147)
Natural Gas    
Derivative assets    
Derivative assets, gross 454 233
Derivative assets, netting (394) (156)
Derivative assets, net 60 77
Liabilities    
Derivative liabilities, gross (594) (223)
Derivative liabilities, netting 347 151
Derivative liabilities, net (247) (72)
Electricity    
Derivative assets    
Derivative assets, gross 643 180
Derivative assets, netting (441) (120)
Derivative assets, net 202 60
Liabilities    
Derivative liabilities, gross (622) (168)
Derivative liabilities, netting 443 125
Derivative liabilities, net (179) (43)
Environmental & Other    
Derivative assets    
Derivative assets, gross 294 154
Derivative assets, netting (285) (135)
Derivative assets, net 9 19
Liabilities    
Derivative liabilities, gross (288) (137)
Derivative liabilities, netting 288 129
Derivative liabilities, net 0 (8)
Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross (4) (5)
Derivative liabilities, netting 0 0
Derivative liabilities, net (4) (5)
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 76 0
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 644 555
Recurring    
Assets    
Cash equivalents 4 438
Derivative assets    
Derivative assets, netting (1,120) (411)
Derivative assets, net 271 156
Total assets 2,507 2,609
Liabilities    
Derivative liabilities, netting 1,078 405
Derivative liabilities, net (430) (128)
Net Assets (Liabilities) at end of period 2,077 2,481
Net Assets (Liabilities) at the end of the period, netting (42) (6)
Recurring | DTE Electric    
Assets    
Cash equivalents 0 4
Derivative assets    
Total assets 2,111 1,890
Recurring | Current assets    
Derivative assets    
Derivative assets, netting (854) (330)
Total assets 185 554
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 9 8
Recurring | Noncurrent assets    
Derivative assets    
Derivative assets, netting (266) (81)
Total assets 2,322 2,055
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 2,102 1,882
Recurring | Current liabilities    
Liabilities    
Derivative liabilities, netting 799 318
Derivative liabilities, net (238) (68)
Recurring | Noncurrent liabilities    
Liabilities    
Derivative liabilities, netting 279 87
Derivative liabilities, net (192) (60)
Recurring | Restricted cash    
Assets    
Cash equivalents 1 2
Recurring | Natural Gas    
Derivative assets    
Derivative assets, netting (394) (156)
Derivative assets, net 60 77
Liabilities    
Derivative liabilities, netting 347 151
Derivative liabilities, net (247) (72)
Recurring | Electricity    
Derivative assets    
Derivative assets, netting (441) (120)
Derivative assets, net 202 60
Liabilities    
Derivative liabilities, netting 443 125
Derivative liabilities, net (179) (43)
Recurring | Environmental & Other    
Derivative assets    
Derivative assets, netting (285) (135)
Derivative assets, net 9 19
Liabilities    
Derivative liabilities, netting 288 129
Derivative liabilities, net 0 (8)
Recurring | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, netting 0 0
Derivative liabilities, net (4) (5)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 9 4
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 39 27
Other investments 86 97
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
Other investments 11 11
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Hedge Funds and Similar Investments    
Assets    
Nuclear decommissioning trusts 76 0
Recurring | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 76 0
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Other investments 68 55
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Other investments 20 16
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 644 555
Other investments 7 8
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 644 555
Other investments 0 0
Recurring | Level 1    
Assets    
Cash equivalents 4 438
Derivative assets    
Derivative assets, gross 273 99
Total assets 1,576 1,773
Liabilities    
Derivative liabilities, gross (177) (88)
Net Assets (Liabilities) at end of period 1,399 1,685
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 0 4
Derivative assets    
Total assets 1,169 1,107
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 227 532
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 4
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,349 1,241
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,169 1,103
Recurring | Level 1 | Current liabilities    
Liabilities    
Derivative liabilities, gross (168) (84)
Recurring | Level 1 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (9) (4)
Recurring | Level 1 | Natural Gas    
Derivative assets    
Derivative assets, gross 273 99
Liabilities    
Derivative liabilities, gross (177) (88)
Recurring | Level 1 | Electricity    
Derivative assets    
Derivative assets, gross 0 0
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Environmental & Other    
Derivative assets    
Derivative assets, gross 0 0
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Foreign currency exchange contracts    
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 39 27
Other investments 86 97
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
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 58 0
Recurring | Level 1 | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 58 0
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 917 947
Other investments 68 55
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 917 947
Other investments 20 16
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 124 102
Other investments 7 8
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 124 102
Other investments 0 0
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 900 352
Total assets 1,336 723
Liabilities    
Derivative liabilities, gross (898) (327)
Net Assets (Liabilities) at end of period 438 396
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 436 371
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 646 260
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 690 463
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 436 371
Recurring | Level 2 | Current liabilities    
Liabilities    
Derivative liabilities, gross (609) (223)
Recurring | Level 2 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (289) (104)
Recurring | Level 2 | Natural Gas    
Derivative assets    
Derivative assets, gross 115 74
Liabilities    
Derivative liabilities, gross (172) (59)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 500 128
Liabilities    
Derivative liabilities, gross (434) (126)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 285 150
Liabilities    
Derivative liabilities, gross (288) (137)
Recurring | Level 2 | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross (4) (5)
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 18 0
Recurring | Level 2 | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 18 0
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 418 371
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 418 371
Other investments 0 0
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 218 116
Total assets 218 116
Liabilities    
Derivative liabilities, gross (433) (118)
Net Assets (Liabilities) at end of period (215) (2)
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 9 4
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 166 92
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 9 4
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 52 24
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Liabilities    
Derivative liabilities, gross (260) (79)
Recurring | Level 3 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (173) (39)
Recurring | Level 3 | Natural Gas    
Derivative assets    
Derivative assets, gross 66 60
Liabilities    
Derivative liabilities, gross (245) (76)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 143 52
Liabilities    
Derivative liabilities, gross (188) (42)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 9 4
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 9 4
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
Other investments 0 0
Recurring | Other    
Derivative assets    
Total assets 497 408
Liabilities    
Net Assets (Liabilities) at end of period 497 408
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 497 408
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 497 408
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 497 408
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 190 222
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 190 222
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 102 82
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 102 $ 82