Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative assets
Derivative assets, gross	$ 694	$ 1,197
Derivative assets, netting	(447)	(791)
Derivative liabilities
Derivative liabilities, gross	(605)	(1,172)
Derivative liabilities, netting	430	863
DTE Electric
Assets
Nuclear decommissioning trusts	2,256	2,041
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(441)	(847)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(164)	(325)
Natural Gas
Derivative assets
Derivative assets, gross	428	637
Derivative assets, netting	(285)	(416)
Derivative liabilities
Derivative liabilities, gross	(410)	(615)
Derivative liabilities, netting	272	429
Electricity
Derivative assets
Derivative assets, gross	187	421
Derivative assets, netting	(116)	(243)
Derivative liabilities
Derivative liabilities, gross	(150)	(388)
Derivative liabilities, netting	114	297
Environmental & Other
Derivative assets
Derivative assets, gross	58	139
Derivative assets, netting	(46)	(132)
Derivative liabilities
Derivative liabilities, gross	(44)	(150)
Derivative liabilities, netting	44	137
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	26	34
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	349	312
Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	228	184
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,003	921
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	650	590
Recurring
Assets
Cash equivalents	11	13
Derivative assets
Derivative assets, netting	(447)	(791)
Derivative assets, net	247	406
Total assets	2,622	2,562
Derivative liabilities
Derivative liabilities, netting	430	863
Total Liabilities	(175)	(309)
Net Assets (Liabilities) at end of period	2,447	2,253
Net Assets (Liabilities) at the end of the period, netting	(17)	72
Recurring | DTE Electric
Assets
Cash equivalents	8	11
Derivative assets
Total assets	2,318	2,091
Recurring | Current assets
Derivative assets
Derivative assets, netting	(326)	(613)
Total assets	173	310
Recurring | Current assets | DTE Electric
Derivative assets
Total assets	17	18
Recurring | Noncurrent assets
Derivative assets
Derivative assets, netting	(121)	(178)
Total assets	2,449	2,252
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total assets	2,301	2,073
Recurring | Current liabilities
Derivative liabilities
Derivative liabilities, netting	323	670
Total Liabilities	(118)	(177)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liabilities, netting	107	193
Total Liabilities	(57)	(132)
Recurring | Restricted cash
Assets
Cash equivalents	8	11
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	8	11
Recurring | Natural Gas
Derivative assets
Derivative assets, netting	(285)	(416)
Derivative assets, net	143	221
Derivative liabilities
Derivative liabilities, netting	272	429
Derivative liabilities, net	(138)	(186)
Recurring | Electricity
Derivative assets
Derivative assets, netting	(116)	(243)
Derivative assets, net	71	178
Derivative liabilities
Derivative liabilities, netting	114	297
Derivative liabilities, net	(36)	(91)
Recurring | Environmental & Other
Derivative assets
Derivative assets, netting	(46)	(132)
Derivative assets, net	12	7
Derivative liabilities
Derivative liabilities, netting	44	137
Derivative liabilities, net	0	(13)
Recurring | Other contracts
Derivative assets
Derivative assets, netting	0	0
Derivative assets, net	21	0
Derivative liabilities
Derivative liabilities, netting	0	0
Derivative liabilities, net	(1)	(19)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	9	7
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	26	34
Other investments	29	37
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	26	34
Other investments	19	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	349	312
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	349	312
Recurring | Hedge Funds and Similar Investments
Assets
Nuclear decommissioning trusts	228	184
Recurring | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	228	184
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	1,003	921
Other investments	72	58
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,003	921
Other investments	26	21
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	650	590
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	650	590
Recurring | Level 1
Assets
Cash equivalents	11	13
Derivative assets
Derivative assets, gross	310	241
Total assets	1,602	1,412
Derivative liabilities
Total Liabilities	(290)	(291)
Net Assets (Liabilities) at end of period	1,312	1,121
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	8	11
Derivative assets
Total assets	1,226	1,099
Recurring | Level 1 | Current assets
Derivative assets
Total assets	223	215
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total assets	8	11
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total assets	1,379	1,197
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	1,218	1,088
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(219)	(240)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(71)	(51)
Recurring | Level 1 | Natural Gas
Derivative assets
Derivative assets, gross	242	241
Derivative liabilities
Derivative liabilities, gross	(217)	(291)
Recurring | Level 1 | Electricity
Derivative assets
Derivative assets, gross	67	0
Derivative liabilities
Derivative liabilities, gross	(71)	0
Recurring | Level 1 | Environmental & Other
Derivative assets
Derivative assets, gross	1	0
Derivative liabilities
Derivative liabilities, gross	(2)	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	26	34
Other investments	29	37
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	26	34
Other investments	19	11
Recurring | Level 1 | Private equity and other
Assets
Nuclear decommissioning trusts	16	0
Recurring | Level 1 | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	16	0
Recurring | Level 1 | Hedge Funds and Similar Investments
Assets
Nuclear decommissioning trusts	151	119
Recurring | Level 1 | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	151	119
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	856	776
Other investments	72	58
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	856	776
Other investments	26	21
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	124	127
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	124	127
Recurring | Level 2
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	218	606
Total assets	648	1,042
Derivative liabilities
Total Liabilities	(162)	(606)
Net Assets (Liabilities) at end of period	486	436
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	430	436
Recurring | Level 2 | Current assets
Derivative assets
Total assets	170	461
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total assets	478	581
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	430	436
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(129)	(462)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(33)	(144)
Recurring | Level 2 | Natural Gas
Derivative assets
Derivative assets, gross	81	217
Derivative liabilities
Derivative liabilities, gross	(70)	(167)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	69	258
Derivative liabilities
Derivative liabilities, gross	(52)	(272)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	47	131
Derivative liabilities
Derivative liabilities, gross	(39)	(148)
Recurring | Level 2 | Other contracts
Derivative assets
Derivative assets, gross	21	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	16	65
Recurring | Level 2 | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	16	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	414	371
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	414	371
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	166	350
Total assets	166	350
Derivative liabilities
Total Liabilities	(153)	(275)
Net Assets (Liabilities) at end of period	13	75
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total assets	9	7
Recurring | Level 3 | Current assets
Derivative assets
Total assets	106	247
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total assets	9	7
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total assets	60	103
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(93)	(145)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(60)	(130)
Recurring | Level 3 | Natural Gas
Derivative assets
Derivative assets, gross	105	179
Derivative liabilities
Derivative liabilities, gross	(123)	(157)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	51	163
Derivative liabilities
Derivative liabilities, gross	(27)	(116)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	10	8
Derivative liabilities
Derivative liabilities, gross	(3)	(2)
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	9	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 | Other
Derivative assets
Total assets	653	549
Derivative liabilities
Net Assets (Liabilities) at end of period	653	549
Recurring | Other | DTE Electric
Derivative assets
Total assets	653	549
Recurring | Other | Noncurrent assets
Derivative assets
Total assets	653	549
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total assets	653	549
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	333	312
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	333	312
Recurring | Other | Hedge Funds and Similar Investments
Assets
Nuclear decommissioning trusts	61	0
Recurring | Other | Hedge Funds and Similar Investments | DTE Electric
Assets
Nuclear decommissioning trusts	61	0
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	147	145
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	147	145
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	112	92
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 112	$ 92