Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Derivative assets
Derivative assets, gross	$ 861	$ 1,197
Derivative asset, netting	(582)	(791)
Derivative liabilities
Derivative liabilities, gross	(832)	(1,172)
Derivative liability, netting	585	863
DTE Electric
Assets
Nuclear decommissioning trusts	2,170	2,041
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(548)	(847)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(284)	(325)
Natural gas
Derivative assets
Derivative assets, gross	421	637
Derivative asset, netting	(275)	(416)
Derivative liabilities
Derivative liabilities, gross	(412)	(615)
Derivative liability, netting	277	429
Electricity
Derivative assets
Derivative assets, gross	255	421
Derivative asset, netting	(157)	(243)
Derivative liabilities
Derivative liabilities, gross	(251)	(388)
Derivative liability, netting	158	297
Environmental & Other
Derivative assets
Derivative assets, gross	178	139
Derivative asset, netting	(150)	(132)
Derivative liabilities
Derivative liabilities, gross	(168)	(150)
Derivative liability, netting	150	137
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	30	34
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	347	312
Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	211	184
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	962	921
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	620	590
Recurring
Assets
Cash equivalents	9	13
Derivative assets
Derivative asset, netting	(582)	(791)
Derivative assets, net	279	406
Total Assets	3,621	2,562
Derivative liabilities
Derivative liability, netting	585	863
Total Liabilities	(247)	(309)
Net Assets at end of period	3,374	2,253
Net Assets at end of period, netting	3	72
Recurring | DTE Electric
Assets
Cash equivalents	7	11
Derivative assets
Total Assets	2,248	2,091
Recurring | Current assets
Derivative assets
Derivative asset, netting	(399)	(613)
Total Assets	1,273	310
Recurring | Current assets | DTE Electric
Derivative assets
Total Assets	35	18
Recurring | Noncurrent assets
Derivative assets
Derivative asset, netting	(183)	(178)
Total Assets	2,348	2,252
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	2,213	2,073
Recurring | Current liabilities
Derivative liabilities
Derivative liability, netting	404	670
Total Liabilities	(144)	(177)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liability, netting	181	193
Total Liabilities	(103)	(132)
Recurring | Restricted cash
Assets
Cash equivalents	8	11
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	7	11
Recurring | Natural gas
Derivative assets
Derivative asset, netting	(275)	(416)
Derivative assets, net	146	221
Derivative liabilities
Derivative liability, netting	277	429
Derivative liabilities, net	(135)	(186)
Recurring | Electricity
Derivative assets
Derivative asset, netting	(157)	(243)
Derivative assets, net	98	178
Derivative liabilities
Derivative liability, netting	158	297
Derivative liabilities, net	(93)	(91)
Recurring | Environmental & Other
Derivative assets
Derivative asset, netting	(150)	(132)
Derivative assets, net	28	7
Derivative liabilities
Derivative liability, netting	150	137
Derivative liabilities, net	(18)	(13)
Recurring | Other Contract
Derivative assets
Derivative assets, net	7	0
Derivative liabilities
Derivative liabilities, net	(1)	(19)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	28	7
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	30	34
Other investments	29	37
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	30	34
Other investments	19	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	347	312
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	347	312
Recurring | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	211	184
Recurring | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	211	184
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	962	921
Other investments	65	58
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	962	921
Other investments	24	21
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	620	590
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	620	590
Recurring | Other
Assets
Other investments	1,062	0
Recurring | Level 1
Assets
Cash equivalents	9	13
Derivative assets
Derivative assets, gross	98	241
Total Assets	1,312	1,412
Derivative liabilities
Total Liabilities	(137)	(291)
Net Assets at end of period	1,175	1,121
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	7	11
Derivative assets
Total Assets	1,154	1,099
Recurring | Level 1 | Current assets
Derivative assets
Total Assets	83	215
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total Assets	7	11
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total Assets	1,229	1,197
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	1,147	1,088
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(108)	(240)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(29)	(51)
Recurring | Level 1 | Natural gas
Derivative assets
Derivative assets, gross	98	241
Derivative liabilities
Derivative liabilities, gross	(137)	(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	30	34
Other investments	29	37
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	30	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	134	119
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	134	119
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	818	776
Other investments	65	58
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	818	776
Other investments	24	21
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	122	127
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	122	127
Recurring | Level 1 | Other
Assets
Other investments	0	0
Recurring | Level 2
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	519	606
Total Assets	2,052	1,042
Derivative liabilities
Total Liabilities	(489)	(606)
Net Assets at end of period	1,563	436
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	471	436
Recurring | Level 2 | Current assets
Derivative assets
Total Assets	1,432	461
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total Assets	620	581
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	471	436
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(334)	(462)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(155)	(144)
Recurring | Level 2 | Natural gas
Derivative assets
Derivative assets, gross	207	217
Derivative liabilities
Derivative liabilities, gross	(162)	(167)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	155	258
Derivative liabilities
Derivative liabilities, gross	(160)	(272)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	150	131
Derivative liabilities
Derivative liabilities, gross	(166)	(148)
Recurring | Level 2 | Other Contract
Derivative assets
Derivative assets, gross	7	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	77	65
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	77	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	394	371
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	394	371
Recurring | Level 2 | Other
Assets
Other investments	1,062	0
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	244	350
Total Assets	244	350
Derivative liabilities
Total Liabilities	(206)	(275)
Net Assets at end of period	38	75
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	28	7
Recurring | Level 3 | Current assets
Derivative assets
Total Assets	157	247
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total Assets	28	7
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total Assets	87	103
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(106)	(145)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(100)	(130)
Recurring | Level 3 | Natural gas
Derivative assets
Derivative assets, gross	116	179
Derivative liabilities
Derivative liabilities, gross	(113)	(157)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	100	163
Derivative liabilities
Derivative liabilities, gross	(91)	(116)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	28	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	28	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	595	549
Derivative liabilities
Net Assets at end of period	595	549
Recurring | Other | DTE Electric
Derivative assets
Total Assets	595	549
Recurring | Other | Noncurrent assets
Derivative assets
Total Assets	595	549
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	595	549
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	347	312
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	347	312
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	144	145
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	144	145
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	104	92
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 104	$ 92