Fair Value (Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Assets |
|
|
| Cash equivalents and Restricted cash |
$ 12
|
$ 176
|
| Derivative assets |
|
|
| Total derivative assets, gross |
1,001
|
707
|
| Total derivative asset, netting |
(726)
|
(475)
|
| Total derivative assets, net balance |
275
|
232
|
| Total Assets |
3,186
|
3,093
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(941)
|
(597)
|
| Total derivative liability, netting |
733
|
445
|
| Total Liabilities |
(208)
|
(152)
|
| Net Assets (Liabilities) at end of period |
2,978
|
2,941
|
| Net Assets at end of period, netting |
7
|
(30)
|
| DTE Electric |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
10
|
83
|
| Nuclear decommissioning trusts |
2,756
|
2,552
|
| Derivative assets |
|
|
| Total Assets |
2,854
|
2,707
|
| Balance Sheet Location [Axis]: us-gaap:AssetsCurrent |
|
|
| Derivative assets |
|
|
| Total derivative asset, netting |
(582)
|
(339)
|
| Total Assets |
197
|
319
|
| Balance Sheet Location [Axis]: us-gaap:AssetsCurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
33
|
94
|
| Balance Sheet Location [Axis]: us-gaap:DerivativeAssetsCurrent |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
767
|
482
|
| Balance Sheet Location [Axis]: us-gaap:DerivativeAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
234
|
225
|
| Balance Sheet Location [Axis]: us-gaap:DerivativeLiabilitiesCurrent |
|
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(739)
|
(413)
|
| Balance Sheet Location [Axis]: us-gaap:DerivativeLiabilitiesNoncurrent |
|
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(202)
|
(184)
|
| Balance Sheet Location [Axis]: us-gaap:LiabilitiesCurrent |
|
|
| Derivative liabilities |
|
|
| Total derivative liability, netting |
582
|
327
|
| Total Liabilities |
(157)
|
(86)
|
| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total derivative asset, netting |
(144)
|
(136)
|
| Total Assets |
2,989
|
2,774
|
| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
2,821
|
2,613
|
| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent |
|
|
| Derivative liabilities |
|
|
| Total derivative liability, netting |
151
|
118
|
| Total Liabilities |
(51)
|
(66)
|
| Balance Sheet Location [Axis]: us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
10
|
10
|
| Balance Sheet Location [Axis]: us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue | DTE Electric |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
10
|
10
|
| Natural gas |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
293
|
372
|
| Total derivative asset, netting |
(176)
|
(235)
|
| Total derivative assets, net balance |
117
|
137
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(313)
|
(329)
|
| Total derivative liability, netting |
240
|
227
|
| Total derivative liabilities, net balance |
(73)
|
(102)
|
| Electricity |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
608
|
275
|
| Total derivative asset, netting |
(489)
|
(194)
|
| Total derivative assets, net balance |
120
|
81
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(578)
|
(235)
|
| Total derivative liability, netting |
444
|
186
|
| Total derivative liabilities, net balance |
(134)
|
(49)
|
| Environmental & Other |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
85
|
57
|
| Total derivative asset, netting |
(61)
|
(46)
|
| Total derivative assets, net balance |
23
|
11
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(49)
|
(32)
|
| Total derivative liability, netting |
49
|
32
|
| Total derivative liabilities, net balance |
0
|
0
|
| Other contracts |
|
|
| Derivative assets |
|
|
| Total derivative assets, net balance |
15
|
3
|
| Derivative liabilities |
|
|
| Total derivative liabilities, net balance |
(1)
|
(1)
|
| Derivative assets — FTRs | DTE Electric |
|
|
| Derivative assets |
|
|
| Total derivative assets, net balance |
23
|
11
|
| Cash equivalents |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
33
|
35
|
| Other investments |
38
|
38
|
| Cash equivalents | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
33
|
35
|
| Other investments |
27
|
26
|
| Private equity and other |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
378
|
358
|
| Private equity and other | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
378
|
358
|
| Hedge funds and similar investments |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
255
|
245
|
| Hedge funds and similar investments | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
255
|
245
|
| Equity securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
1,284
|
1,188
|
| Other investments |
93
|
84
|
| Equity securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
1,284
|
1,188
|
| Other investments |
36
|
33
|
| Fixed income securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
806
|
726
|
| Other investments |
12
|
11
|
| Fixed income securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
806
|
726
|
| Other investments |
2
|
2
|
| Level 1 |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
12
|
176
|
| Derivative assets |
|
|
| Total derivative assets, gross |
491
|
334
|
| Total Assets |
2,111
|
2,024
|
| Derivative liabilities |
|
|
| Total Liabilities |
(506)
|
(321)
|
| Net Assets (Liabilities) at end of period |
1,605
|
1,703
|
| Level 1 | DTE Electric |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
10
|
83
|
| Derivative assets |
|
|
| Total Assets |
1,540
|
1,525
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
412
|
426
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
10
|
83
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:LiabilitiesCurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(405)
|
(240)
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
1,699
|
1,598
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
1,530
|
1,442
|
| Level 1 | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(101)
|
(81)
|
| Level 1 | Natural gas |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
159
|
207
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(220)
|
(196)
|
| Level 1 | Electricity |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
318
|
127
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(270)
|
(124)
|
| Level 1 | Environmental & Other |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
14
|
0
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(16)
|
(1)
|
| Level 1 | Other contracts |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
0
|
0
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
0
|
0
|
| Level 1 | Derivative assets — FTRs | DTE Electric |
|
|
| Derivative assets |
|
|
| Total derivative assets, net balance |
0
|
0
|
| Level 1 | Cash equivalents |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
33
|
35
|
| Other investments |
38
|
38
|
| Level 1 | Cash equivalents | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
33
|
35
|
| Other investments |
27
|
26
|
| Level 1 | Private equity and other |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 1 | Private equity and other | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 1 | Hedge funds and similar investments |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
237
|
228
|
| Level 1 | Hedge funds and similar investments | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
237
|
228
|
| Level 1 | Equity securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
1,036
|
987
|
| Other investments |
93
|
84
|
| Level 1 | Equity securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
1,036
|
987
|
| Other investments |
36
|
33
|
| Level 1 | Fixed income securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
161
|
133
|
| Other investments |
10
|
9
|
| Level 1 | Fixed income securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
161
|
133
|
| Other investments |
0
|
0
|
| Level 2 |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
0
|
0
|
| Derivative assets |
|
|
| Total derivative assets, gross |
367
|
220
|
| Total Assets |
894
|
699
|
| Derivative liabilities |
|
|
| Total Liabilities |
(190)
|
(142)
|
| Net Assets (Liabilities) at end of period |
704
|
557
|
| Level 2 | DTE Electric |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
0
|
0
|
| Derivative assets |
|
|
| Total Assets |
527
|
479
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
278
|
130
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
0
|
0
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:LiabilitiesCurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(150)
|
(106)
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
616
|
569
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
527
|
479
|
| Level 2 | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(40)
|
(36)
|
| Level 2 | Natural gas |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
40
|
56
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(18)
|
(51)
|
| Level 2 | Electricity |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
265
|
115
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(138)
|
(59)
|
| Level 2 | Environmental & Other |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
47
|
46
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(33)
|
(31)
|
| Level 2 | Other contracts |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
15
|
3
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(1)
|
(1)
|
| Level 2 | Derivative assets — FTRs | DTE Electric |
|
|
| Derivative assets |
|
|
| Total derivative assets, net balance |
0
|
0
|
| Level 2 | Cash equivalents |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 2 | Cash equivalents | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 2 | Private equity and other |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 2 | Private equity and other | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 2 | Hedge funds and similar investments |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
18
|
17
|
| Level 2 | Hedge funds and similar investments | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
18
|
17
|
| Level 2 | Equity securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 2 | Equity securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 2 | Fixed income securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
507
|
460
|
| Other investments |
2
|
2
|
| Level 2 | Fixed income securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
507
|
460
|
| Other investments |
2
|
2
|
| Level 3 |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
0
|
0
|
| Derivative assets |
|
|
| Total derivative assets, gross |
143
|
153
|
| Total Assets |
143
|
153
|
| Derivative liabilities |
|
|
| Total Liabilities |
(245)
|
(134)
|
| Net Assets (Liabilities) at end of period |
(102)
|
19
|
| Level 3 | DTE Electric |
|
|
| Assets |
|
|
| Cash equivalents and Restricted cash |
0
|
0
|
| Derivative assets |
|
|
| Total Assets |
23
|
11
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
89
|
102
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:AssetsCurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
23
|
11
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:LiabilitiesCurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(184)
|
(67)
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
54
|
51
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
0
|
0
|
| Level 3 | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent |
|
|
| Derivative liabilities |
|
|
| Total Liabilities |
(61)
|
(67)
|
| Level 3 | Natural gas |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
94
|
109
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(75)
|
(82)
|
| Level 3 | Electricity |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
26
|
33
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
(170)
|
(52)
|
| Level 3 | Environmental & Other |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
23
|
11
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
0
|
0
|
| Level 3 | Other contracts |
|
|
| Derivative assets |
|
|
| Total derivative assets, gross |
0
|
0
|
| Derivative liabilities |
|
|
| Total derivative liabilities, gross |
0
|
0
|
| Level 3 | Derivative assets — FTRs | DTE Electric |
|
|
| Derivative assets |
|
|
| Total derivative assets, net balance |
23
|
11
|
| Level 3 | Cash equivalents |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 3 | Cash equivalents | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 3 | Private equity and other |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 3 | Private equity and other | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 3 | Hedge funds and similar investments |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 3 | Hedge funds and similar investments | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Level 3 | Equity securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 3 | Equity securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 3 | Fixed income securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Level 3 | Fixed income securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other investments |
0
|
0
|
| Other |
|
|
| Derivative assets |
|
|
| Total Assets |
764
|
692
|
| Derivative liabilities |
|
|
| Net Assets (Liabilities) at end of period |
764
|
692
|
| Other | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
764
|
692
|
| Other | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent |
|
|
| Derivative assets |
|
|
| Total Assets |
764
|
692
|
| Other | Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent | DTE Electric |
|
|
| Derivative assets |
|
|
| Total Assets |
764
|
692
|
| Other | Private equity and other |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
378
|
358
|
| Other | Private equity and other | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
378
|
358
|
| Other | Hedge funds and similar investments |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other | Hedge funds and similar investments | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
0
|
0
|
| Other | Equity securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
248
|
201
|
| Other | Equity securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
248
|
201
|
| Other | Fixed income securities |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
138
|
133
|
| Other | Fixed income securities | DTE Electric |
|
|
| Assets |
|
|
| Nuclear decommissioning trusts |
$ 138
|
$ 133
|