Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative assets
Derivative assets, gross	$ 1,197	$ 1,922
Derivative assets, netting	$ (791)	$ (1,489)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Asset, Current, Derivative Asset, Noncurrent	Derivative Asset, Current, Derivative Asset, Noncurrent
Derivative liabilities
Derivative liabilities, gross	$ (1,172)	$ (2,169)
Derivative liabilities, netting	863	1,512
DTE Electric
Assets
Nuclear decommissioning trusts	2,041	1,825
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(847)	(1,535)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(325)	(634)
Natural Gas
Derivative assets
Derivative assets, gross	637	744
Derivative assets, netting	(416)	(649)
Derivative liabilities
Derivative liabilities, gross	(615)	(1,018)
Derivative liabilities, netting	429	645
Electricity
Derivative assets
Derivative assets, gross	421	963
Derivative assets, netting	(243)	(643)
Derivative liabilities
Derivative liabilities, gross	(388)	(935)
Derivative liabilities, netting	297	665
Environmental & Other
Derivative assets
Derivative assets, gross	139	213
Derivative assets, netting	(132)	(196)
Derivative liabilities
Derivative liabilities, gross	(150)	(214)
Derivative liabilities, netting	137	201
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	34	42
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	312	262
Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	184	119
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	921	839
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	590	563
Recurring
Assets
Cash equivalents	13	10
Derivative assets
Derivative assets, netting	(791)	(1,489)
Derivative assets, net	406	433
Total assets	2,562	2,403
Derivative liabilities
Derivative liabilities, netting	863	1,512
Total Liabilities	(309)	(657)
Net Assets (Liabilities) at end of period	2,253	1,746
Net Assets (Liabilities) at the end of the period, netting	72	23
Recurring | DTE Electric
Assets
Cash equivalents	11	9
Derivative assets
Total assets	2,091	1,872
Recurring | Current assets
Derivative assets
Derivative assets, netting	(613)	(1,189)
Total assets	310	338
Recurring | Current assets | DTE Electric
Derivative assets
Total assets	18	20
Recurring | Noncurrent assets
Derivative assets
Derivative assets, netting	(178)	(300)
Total assets	2,252	2,065
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total assets	2,073	1,852
Recurring | Current liabilities
Derivative liabilities
Derivative liabilities, netting	670	1,193
Total Liabilities	(177)	(342)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liabilities, netting	193	319
Total Liabilities	(132)	(315)
Recurring | Restricted cash
Assets
Cash equivalents	11	10
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	11	9
Recurring | Natural Gas
Derivative assets
Derivative assets, netting	(416)	(649)
Derivative assets, net	221	95
Derivative liabilities
Derivative liabilities, netting	429	645
Derivative liabilities, net	(186)	(373)
Recurring | Electricity
Derivative assets
Derivative assets, netting	(243)	(643)
Derivative assets, net	178	320
Derivative liabilities
Derivative liabilities, netting	297	665
Derivative liabilities, net	(91)	(270)
Recurring | Environmental & Other
Derivative assets
Derivative assets, netting	(132)	(196)
Derivative assets, net	7	17
Derivative liabilities
Derivative liabilities, netting	137	201
Derivative liabilities, net	(13)	(13)
Recurring | Other contracts
Derivative assets
Derivative assets, netting	0	(1)
Derivative assets, net	0	1
Derivative liabilities
Derivative liabilities, netting	0	1
Derivative liabilities, net	(19)	(1)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	7	11
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	34	42
Other investments	37	72
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	34	42
Other investments	11	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	312	262
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	312	262
Recurring | Hedge Funds and Similar Investments
Assets
Nuclear decommissioning trusts	184	119
Recurring | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	184	119
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	921	839
Other investments	58	56
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	921	839
Other investments	21	16
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	590	563
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	590	563
Recurring | Level 1
Assets
Cash equivalents	13	10
Derivative assets
Derivative assets, gross	241	426
Total assets	1,412	1,507
Derivative liabilities
Total Liabilities	(291)	(297)
Net Assets (Liabilities) at end of period	1,121	1,210
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	11	9
Derivative assets
Total assets	1,099	972
Recurring | Level 1 | Current assets
Derivative assets
Total assets	215	360
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total assets	11	9
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total assets	1,197	1,147
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	1,088	963
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(240)	(273)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(51)	(24)
Recurring | Level 1 | Natural Gas
Derivative assets
Derivative assets, gross	241	426
Derivative liabilities
Derivative liabilities, gross	(291)	(297)
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 | Other 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	34	42
Other investments	37	72
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	34	42
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	119	78
Recurring | Level 1 | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	119	78
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	776	701
Other investments	58	56
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	776	701
Other investments	21	16
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	127	115
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	127	115
Recurring | Level 2
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	606	1,106
Total assets	1,042	1,506
Derivative liabilities
Total Liabilities	(606)	(1,205)
Net Assets (Liabilities) at end of period	436	301
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	436	400
Recurring | Level 2 | Current assets
Derivative assets
Total assets	461	881
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total assets	581	625
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	436	400
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(462)	(876)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(144)	(329)
Recurring | Level 2 | Natural Gas
Derivative assets
Derivative assets, gross	217	183
Derivative liabilities
Derivative liabilities, gross	(167)	(331)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	258	720
Derivative liabilities
Derivative liabilities, gross	(272)	(659)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	131	201
Derivative liabilities
Derivative liabilities, gross	(148)	(213)
Recurring | Level 2 | Other contracts
Derivative assets
Derivative assets, gross	0	2
Derivative liabilities
Derivative liabilities, gross	(19)	(2)
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	65	41
Recurring | Level 2 | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	65	41
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	371	359
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	371	359
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	350	390
Total assets	350	390
Derivative liabilities
Total Liabilities	(275)	(667)
Net Assets (Liabilities) at end of period	75	(277)
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	7	11
Recurring | Level 3 | Current assets
Derivative assets
Total assets	247	286
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total assets	7	11
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total assets	103	104
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(145)	(386)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(130)	(281)
Recurring | Level 3 | Natural Gas
Derivative assets
Derivative assets, gross	179	135
Derivative liabilities
Derivative liabilities, gross	(157)	(390)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	163	243
Derivative liabilities
Derivative liabilities, gross	(116)	(276)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	8	12
Derivative liabilities
Derivative liabilities, gross	(2)	(1)
Recurring | Level 3 | Other 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	7	11
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	549	489
Derivative liabilities
Net Assets (Liabilities) at end of period	549	489
Recurring | Other | DTE Electric
Derivative assets
Total assets	549	489
Recurring | Other | Noncurrent assets
Derivative assets
Total assets	549	489
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total assets	549	489
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	312	262
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	312	262
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	145	138
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	145	138
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	92	89
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 92	$ 89