Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative assets
Derivative assets, gross	$ 1,356	$ 1,922
Derivative asset, netting	(986)	(1,489)
Derivative liabilities
Derivative liabilities, gross	(1,429)	(2,169)
Derivative liability, netting	1,052	1,512
DTE Electric
Assets
Nuclear decommissioning trusts	1,953	1,825
Current liabilities
Derivative liabilities
Derivative liabilities, gross	(918)	(1,535)
Noncurrent liabilities
Derivative liabilities
Derivative liabilities, gross	(511)	(634)
Natural gas
Derivative assets
Derivative assets, gross	501	744
Derivative asset, netting	(335)	(649)
Derivative liabilities
Derivative liabilities, gross	(583)	(1,018)
Derivative liability, netting	350	645
Electricity
Derivative assets
Derivative assets, gross	497	963
Derivative asset, netting	(311)	(643)
Derivative liabilities
Derivative liabilities, gross	(487)	(935)
Derivative liability, netting	352	665
Environmental & Other
Derivative assets
Derivative assets, gross	354	213
Derivative asset, netting	(340)	(196)
Derivative liabilities
Derivative liabilities, gross	(357)	(214)
Derivative liability, netting	350	201
Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	43	42
Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	291	262
Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	164	119
Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	896	839
Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	559	563
Recurring
Assets
Cash equivalents	17	10
Derivative assets
Derivative asset, netting	(986)	(1,489)
Derivative assets, net	370	433
Total Assets	2,438	2,403
Derivative liabilities
Derivative liability, netting	1,052	1,512
Total Liabilities	(377)	(657)
Net Assets (Liabilities) at end of period	2,061	1,746
Net Assets (Liabilities) at end of period, netting	66	23
Recurring | DTE Electric
Assets
Cash equivalents	9	9
Derivative assets
Total Assets	2,007	1,872
Recurring | Current assets
Derivative assets
Derivative asset, netting	(697)	(1,189)
Total Assets	275	338
Recurring | Current assets | DTE Electric
Derivative assets
Total Assets	23	20
Recurring | Noncurrent assets
Derivative assets
Derivative asset, netting	(289)	(300)
Total Assets	2,163	2,065
Recurring | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	1,984	1,852
Recurring | Current liabilities
Derivative liabilities
Derivative liability, netting	732	1,193
Total Liabilities	(186)	(342)
Recurring | Noncurrent liabilities
Derivative liabilities
Derivative liability, netting	320	319
Total Liabilities	(191)	(315)
Recurring | Restricted cash
Assets
Cash equivalents	11	10
Recurring | Restricted cash | DTE Electric
Assets
Cash equivalents	9	9
Recurring | Natural gas
Derivative assets
Derivative asset, netting	(335)	(649)
Derivative assets, net	166	95
Derivative liabilities
Derivative liability, netting	350	645
Derivative liabilities, net	(233)	(373)
Recurring | Electricity
Derivative assets
Derivative asset, netting	(311)	(643)
Derivative assets, net	186	320
Derivative liabilities
Derivative liability, netting	352	665
Derivative liabilities, net	(135)	(270)
Recurring | Environmental & Other
Derivative assets
Derivative asset, netting	(340)	(196)
Derivative assets, net	14	17
Derivative liabilities
Derivative liability, netting	350	201
Derivative liabilities, net	(7)	(13)
Recurring | Other Contract
Derivative assets
Derivative asset, netting	0	(1)
Derivative assets, net	4	1
Derivative liabilities
Derivative liability, netting	0	1
Derivative liabilities, net	(2)	(1)
Recurring | Derivative assets — FTRs | DTE Electric
Derivative assets
Derivative assets, net	14	11
Recurring | Cash equivalents
Assets
Nuclear decommissioning trusts	43	42
Other investments	35	72
Recurring | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	43	42
Other investments	11	11
Recurring | Private equity and other
Assets
Nuclear decommissioning trusts	291	262
Recurring | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	291	262
Recurring | Hedge funds and similar investments
Assets
Nuclear decommissioning trusts	164	119
Recurring | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	164	119
Recurring | Equity securities
Assets
Nuclear decommissioning trusts	896	839
Other investments	56	56
Recurring | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	896	839
Other investments	20	16
Recurring | Fixed income securities
Assets
Nuclear decommissioning trusts	559	563
Other investments	7	7
Recurring | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	559	563
Recurring | Level 1
Assets
Cash equivalents	17	10
Derivative assets
Derivative assets, gross	151	426
Total Assets	1,268	1,507
Derivative liabilities
Total Liabilities	(144)	(297)
Net Assets (Liabilities) at end of period	1,124	1,210
Recurring | Level 1 | DTE Electric
Assets
Cash equivalents	9	9
Derivative assets
Total Assets	1,042	972
Recurring | Level 1 | Current assets
Derivative assets
Total Assets	130	360
Recurring | Level 1 | Current assets | DTE Electric
Derivative assets
Total Assets	9	9
Recurring | Level 1 | Noncurrent assets
Derivative assets
Total Assets	1,138	1,147
Recurring | Level 1 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	1,033	963
Recurring | Level 1 | Current liabilities
Derivative liabilities
Total Liabilities	(116)	(273)
Recurring | Level 1 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(28)	(24)
Recurring | Level 1 | Natural gas
Derivative assets
Derivative assets, gross	151	426
Derivative liabilities
Derivative liabilities, gross	(144)	(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 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	43	42
Other investments	35	72
Recurring | Level 1 | Cash equivalents | DTE Electric
Assets
Nuclear decommissioning trusts	43	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	102	78
Recurring | Level 1 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	102	78
Recurring | Level 1 | Equity securities
Assets
Nuclear decommissioning trusts	752	701
Other investments	56	56
Recurring | Level 1 | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	752	701
Other investments	20	16
Recurring | Level 1 | Fixed income securities
Assets
Nuclear decommissioning trusts	105	115
Other investments	7	7
Recurring | Level 1 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	105	115
Recurring | Level 2
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	867	1,106
Total Assets	1,291	1,506
Derivative liabilities
Total Liabilities	(905)	(1,205)
Net Assets (Liabilities) at end of period	386	301
Recurring | Level 2 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	424	400
Recurring | Level 2 | Current assets
Derivative assets
Total Assets	612	881
Recurring | Level 2 | Current assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 2 | Noncurrent assets
Derivative assets
Total Assets	679	625
Recurring | Level 2 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	424	400
Recurring | Level 2 | Current liabilities
Derivative liabilities
Total Liabilities	(601)	(876)
Recurring | Level 2 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(304)	(329)
Recurring | Level 2 | Natural gas
Derivative assets
Derivative assets, gross	183	183
Derivative liabilities
Derivative liabilities, gross	(218)	(331)
Recurring | Level 2 | Electricity
Derivative assets
Derivative assets, gross	348	720
Derivative liabilities
Derivative liabilities, gross	(334)	(659)
Recurring | Level 2 | Environmental & Other
Derivative assets
Derivative assets, gross	332	201
Derivative liabilities
Derivative liabilities, gross	(351)	(213)
Recurring | Level 2 | Other Contract
Derivative assets
Derivative assets, gross	4	2
Derivative liabilities
Derivative liabilities, gross	(2)	(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	62	41
Recurring | Level 2 | Hedge funds and similar investments | DTE Electric
Assets
Nuclear decommissioning trusts	62	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	362	359
Other investments	0	0
Recurring | Level 2 | Fixed income securities | DTE Electric
Assets
Nuclear decommissioning trusts	362	359
Recurring | Level 3
Assets
Cash equivalents	0	0
Derivative assets
Derivative assets, gross	338	390
Total Assets	338	390
Derivative liabilities
Total Liabilities	(380)	(667)
Net Assets (Liabilities) at end of period	(42)	(277)
Recurring | Level 3 | DTE Electric
Assets
Cash equivalents	0	0
Derivative assets
Total Assets	14	11
Recurring | Level 3 | Current assets
Derivative assets
Total Assets	230	286
Recurring | Level 3 | Current assets | DTE Electric
Derivative assets
Total Assets	14	11
Recurring | Level 3 | Noncurrent assets
Derivative assets
Total Assets	108	104
Recurring | Level 3 | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	0	0
Recurring | Level 3 | Current liabilities
Derivative liabilities
Total Liabilities	(201)	(386)
Recurring | Level 3 | Noncurrent liabilities
Derivative liabilities
Total Liabilities	(179)	(281)
Recurring | Level 3 | Natural gas
Derivative assets
Derivative assets, gross	167	135
Derivative liabilities
Derivative liabilities, gross	(221)	(390)
Recurring | Level 3 | Electricity
Derivative assets
Derivative assets, gross	149	243
Derivative liabilities
Derivative liabilities, gross	(153)	(276)
Recurring | Level 3 | Environmental & Other
Derivative assets
Derivative assets, gross	22	12
Derivative liabilities
Derivative liabilities, gross	(6)	(1)
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	14	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	527	489
Derivative liabilities
Net Assets (Liabilities) at end of period	527	489
Recurring | Other | DTE Electric
Derivative assets
Total Assets	527	489
Recurring | Other | Noncurrent assets
Derivative assets
Total Assets	527	489
Recurring | Other | Noncurrent assets | DTE Electric
Derivative assets
Total Assets	527	489
Recurring | Other | Private equity and other
Assets
Nuclear decommissioning trusts	291	262
Recurring | Other | Private equity and other | DTE Electric
Assets
Nuclear decommissioning trusts	291	262
Recurring | Other | Equity securities
Assets
Nuclear decommissioning trusts	144	138
Recurring | Other | Equity securities | DTE Electric
Assets
Nuclear decommissioning trusts	144	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