Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative assets
Derivative assets, gross	$ 891	$ 1,197
Derivative asset, netting	(643)	(791)
Derivative liabilities
Derivative liabilities, gross	(935)	(1,172)
Derivative liability, netting	690	863
DTE Electric
Assets
Nuclear decommissioning trusts	2,134	2,041
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(642)	(847)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(293)	(325)
Natural gas
Derivative assets
Derivative assets, gross	499	637
Derivative asset, netting	(346)	(416)
Derivative liabilities
Derivative liabilities, gross	(506)	(615)
Derivative liability, netting	371	429
Electricity
Derivative assets
Derivative assets, gross	235	421
Derivative asset, netting	(155)	(243)
Derivative liabilities
Derivative liabilities, gross	(267)	(388)
Derivative liability, netting	167	297
Environmental & Other
Derivative assets
Derivative assets, gross	146	139
Derivative asset, netting	(142)	(132)
Derivative liabilities
Derivative liabilities, gross	(161)	(150)
Derivative liability, netting	152	137
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	39	34
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	328	312
Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	192	184
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	982	921
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	593	590
Recurring
Assets
Cash equivalents	169	13
Derivative assets
Derivative asset, netting	(643)	(791)
Derivative assets, net	248	406
Total Assets	2,855	2,562
Derivative liabilities
Derivative liability, netting	690	863
Total Liabilities	(245)	(309)
Net Assets (Liabilities) at end of period	2,610	2,253
Net Assets (Liabilities) at end of period, netting	47	72
Recurring | DTE Electric
Assets
Cash equivalents	169	11
Derivative assets
Total Assets	2,348	2,091
Recurring | Current assets
Derivative assets
Derivative asset, netting	(467)	(613)
Total Assets	560	310
Recurring | Current assets | DTE Electric
Derivative assets
Total Assets	172	18
Recurring | Noncurrent assets
Derivative assets
Derivative asset, netting	(176)	(178)
Total Assets	2,295	2,252
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	2,176	2,073
Recurring | Current liabilities
Derivative liabilities
Derivative liability, netting	516	670
Total Liabilities	(126)	(177)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liability, netting	174	193
Total Liabilities	(119)	(132)
Recurring | Restricted cash
Assets
Cash equivalents	19	11
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	19	11
Recurring | Natural gas
Derivative assets
Derivative asset, netting	(346)	(416)
Derivative assets, net	153	221
Derivative liabilities
Derivative liability, netting	371	429
Derivative liabilities, net	(135)	(186)
Recurring | Electricity
Derivative assets
Derivative asset, netting	(155)	(243)
Derivative assets, net	80	178
Derivative liabilities
Derivative liability, netting	167	297
Derivative liabilities, net	(100)	(91)
Recurring | Environmental & Other
Derivative assets
Derivative asset, netting	(142)	(132)
Derivative assets, net	4	7
Derivative liabilities
Derivative liability, netting	152	137
Derivative liabilities, net	(9)	(13)
Recurring | Other Contract
Derivative assets
Derivative asset, netting	0	0
Derivative assets, net	11	0
Derivative liabilities
Derivative liability, netting	0	0
Derivative liabilities, net	(1)	(19)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	3	7
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	39	34
Other investments	31	37
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	39	34
Other investments	19	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	328	312
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	328	312
Recurring | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	192	184
Recurring | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	192	184
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	982	921
Other investments	66	58
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	982	921
Other investments	23	21
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	593	590
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	593	590
Recurring | Other
Assets
Other investments	200	0
Recurring | Level 1
Assets
Cash equivalents	19	13
Derivative assets
Derivative assets, gross	162	241
Total Assets	1,412	1,412
Derivative liabilities
Total Liabilities	(243)	(291)
Net Assets (Liabilities) at end of period	1,169	1,121
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	19	11
Derivative assets
Total Assets	1,188	1,099
Recurring | Level 1 | Current assets
Derivative assets
Total Assets	156	215
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total Assets	19	11
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total Assets	1,256	1,197
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	1,169	1,088
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(204)	(240)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(39)	(51)
Recurring | Level 1 | Natural gas
Derivative assets
Derivative assets, gross	162	241
Derivative liabilities
Derivative liabilities, gross	(243)	(291)
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 Contract
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	39	34
Other investments	31	37
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	39	34
Other investments	19	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	128	119
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	128	119
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	843	776
Other investments	66	58
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	843	776
Other investments	23	21
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	117	127
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	117	127
Recurring | Level 1 | Other
Assets
Other investments	0	0
Recurring | Level 2
Assets
Cash equivalents	150	0
Derivative assets
Derivative assets, gross	529	606
Total Assets	1,320	1,042
Derivative liabilities
Total Liabilities	(466)	(606)
Net Assets (Liabilities) at end of period	854	436
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	150	0
Derivative assets
Total Assets	591	436
Recurring | Level 2 | Current assets
Derivative assets
Total Assets	734	461
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total Assets	150	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total Assets	586	581
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	441	436
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(333)	(462)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(133)	(144)
Recurring | Level 2 | Natural gas
Derivative assets
Derivative assets, gross	218	217
Derivative liabilities
Derivative liabilities, gross	(141)	(167)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	158	258
Derivative liabilities
Derivative liabilities, gross	(165)	(272)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	142	131
Derivative liabilities
Derivative liabilities, gross	(159)	(148)
Recurring | Level 2 | Other Contract
Derivative assets
Derivative assets, gross	11	0
Derivative liabilities
Derivative liabilities, gross	(1)	(19)
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	64	65
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	64	65
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	377	371
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	377	371
Recurring | Level 2 | Other
Assets
Other investments	200	0
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	200	350
Total Assets	200	350
Derivative liabilities
Total Liabilities	(226)	(275)
Net Assets (Liabilities) at end of period	(26)	75
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	3	7
Recurring | Level 3 | Current assets
Derivative assets
Total Assets	137	247
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total Assets	3	7
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total Assets	63	103
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(105)	(145)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(121)	(130)
Recurring | Level 3 | Natural gas
Derivative assets
Derivative assets, gross	119	179
Derivative liabilities
Derivative liabilities, gross	(122)	(157)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	77	163
Derivative liabilities
Derivative liabilities, gross	(102)	(116)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	4	8
Derivative liabilities
Derivative liabilities, gross	(2)	(2)
Recurring | Level 3 | Other Contract
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	3	7
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 | Level 3 | Other
Assets
Other investments	0	0
Recurring | Other
Derivative assets
Total Assets	566	549
Derivative liabilities
Net Assets (Liabilities) at end of period	566	549
Recurring | Other | DTE Electric
Derivative assets
Total Assets	566	549
Recurring | Other | Noncurrent assets
Derivative assets
Total Assets	566	549
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	566	549
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	328	312
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	328	312
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	139	145
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	139	145
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	99	92
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 99	$ 92