Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Derivative assets
Derivative assets, gross	$ 684	$ 1,197
Derivative asset, netting	(456)	(791)
Derivative liabilities
Derivative liabilities, gross	(622)	(1,172)
Derivative liability, netting	448	863
DTE Electric
Assets
Nuclear decommissioning trusts	2,261	2,041
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(411)	(847)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(211)	(325)
Natural gas
Derivative assets
Derivative assets, gross	399	637
Derivative asset, netting	(285)	(416)
Derivative liabilities
Derivative liabilities, gross	(377)	(615)
Derivative liability, netting	277	429
Electricity
Derivative assets
Derivative assets, gross	191	421
Derivative asset, netting	(98)	(243)
Derivative liabilities
Derivative liabilities, gross	(171)	(388)
Derivative liability, netting	108	297
Environmental & Other
Derivative assets
Derivative assets, gross	93	139
Derivative asset, netting	(73)	(132)
Derivative liabilities
Derivative liabilities, gross	(62)	(150)
Derivative liability, netting	63	137
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	31	34
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	350	312
Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	222	184
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,008	921
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	650	590
Recurring
Assets
Cash equivalents	962	13
Derivative assets
Derivative asset, netting	(456)	(791)
Derivative assets, net	228	406
Total Assets	4,629	2,562
Derivative liabilities
Derivative liability, netting	448	863
Total Liabilities	(174)	(309)
Net Assets (Liabilities) at end of period	4,455	2,253
Net Assets at end of period, netting	(8)	72
Recurring | DTE Electric
Assets
Cash equivalents	21	11
Derivative assets
Total Assets	2,348	2,091
Recurring | Current assets
Derivative assets
Derivative asset, netting	(320)	(613)
Total Assets	2,192	310
Recurring | Current assets | DTE Electric
Derivative assets
Total Assets	42	18
Recurring | Noncurrent assets
Derivative assets
Derivative asset, netting	(136)	(178)
Total Assets	2,437	2,252
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	2,306	2,073
Recurring | Current liabilities
Derivative liabilities
Derivative liability, netting	317	670
Total Liabilities	(94)	(177)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liability, netting	131	193
Total Liabilities	(80)	(132)
Recurring | Restricted cash
Assets
Cash equivalents	21	11
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	21	11
Recurring | Natural gas
Derivative assets
Derivative asset, netting	(285)	(416)
Derivative assets, net	114	221
Derivative liabilities
Derivative liability, netting	277	429
Derivative liabilities, net	(100)	(186)
Recurring | Electricity
Derivative assets
Derivative asset, netting	(98)	(243)
Derivative assets, net	93	178
Derivative liabilities
Derivative liability, netting	108	297
Derivative liabilities, net	(63)	(91)
Recurring | Environmental & Other
Derivative assets
Derivative asset, netting	(73)	(132)
Derivative assets, net	20	7
Derivative liabilities
Derivative liability, netting	63	137
Derivative liabilities, net	1	(13)
Recurring | Other contracts
Derivative assets
Derivative assets, net	1	0
Derivative liabilities
Derivative liabilities, net	(12)	(19)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	21	7
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	31	34
Other investments	28	37
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	31	34
Other investments	19	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	350	312
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	350	312
Recurring | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	222	184
Recurring | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	222	184
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	1,008	921
Other investments	71	58
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	1,008	921
Other investments	26	21
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	650	590
Other investments	8	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	650	590
Recurring | Other
Assets
Other investments	1,071	0
Recurring | Level 1
Assets
Cash equivalents	29	13
Derivative assets
Derivative assets, gross	116	241
Total Assets	1,424	1,412
Derivative liabilities
Total Liabilities	(140)	(291)
Net Assets (Liabilities) at end of period	1,284	1,121
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	21	11
Derivative assets
Total Assets	1,238	1,099
Recurring | Level 1 | Current assets
Derivative assets
Total Assets	111	215
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total Assets	21	11
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total Assets	1,313	1,197
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	1,217	1,088
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(103)	(240)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(37)	(51)
Recurring | Level 1 | Natural gas
Derivative assets
Derivative assets, gross	116	241
Derivative liabilities
Derivative liabilities, gross	(140)	(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 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	31	34
Other investments	28	37
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	31	34
Other investments	19	11
Recurring | Level 1 | Private equity and other
Assets
Nuclear decommissioning trusts	15	0
Recurring | Level 1 | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	15	0
Recurring | Level 1 | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	141	119
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	141	119
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	860	776
Other investments	71	58
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	860	776
Other investments	26	21
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	125	127
Other investments	8	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	125	127
Recurring | Level 1 | Other
Assets
Other investments	0	0
Recurring | Level 2
Assets
Cash equivalents	933	0
Derivative assets
Derivative assets, gross	340	606
Total Assets	2,840	1,042
Derivative liabilities
Total Liabilities	(297)	(606)
Net Assets (Liabilities) at end of period	2,543	436
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	496	436
Recurring | Level 2 | Current assets
Derivative assets
Total Assets	2,250	461
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total Assets	590	581
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	496	436
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(212)	(462)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(85)	(144)
Recurring | Level 2 | Natural gas
Derivative assets
Derivative assets, gross	175	217
Derivative liabilities
Derivative liabilities, gross	(124)	(167)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	93	258
Derivative liabilities
Derivative liabilities, gross	(102)	(272)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	71	131
Derivative liabilities
Derivative liabilities, gross	(59)	(148)
Recurring | Level 2 | Other contracts
Derivative assets
Derivative assets, gross	1	0
Derivative liabilities
Derivative liabilities, gross	(12)	(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	81	65
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	81	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	415	371
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	415	371
Recurring | Level 2 | Other
Assets
Other investments	1,071	0
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	228	350
Total Assets	228	350
Derivative liabilities
Total Liabilities	(185)	(275)
Net Assets (Liabilities) at end of period	43	75
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	21	7
Recurring | Level 3 | Current assets
Derivative assets
Total Assets	151	247
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total Assets	21	7
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total Assets	77	103
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(96)	(145)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(89)	(130)
Recurring | Level 3 | Natural gas
Derivative assets
Derivative assets, gross	108	179
Derivative liabilities
Derivative liabilities, gross	(113)	(157)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	98	163
Derivative liabilities
Derivative liabilities, gross	(69)	(116)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	22	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	21	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	593	549
Derivative liabilities
Net Assets (Liabilities) at end of period	593	549
Recurring | Other | DTE Electric
Derivative assets
Total Assets	593	549
Recurring | Other | Noncurrent assets
Derivative assets
Total Assets	593	549
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	593	549
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	335	312
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	335	312
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	148	145
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	148	145
Recurring | Other | Fixed income securities
Assets
Nuclear decommissioning trusts	110	92
Recurring | Other | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	$ 110	$ 92