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Segment and Related Information (Profit (Loss) Financial Data) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | $ 1,979 |  | $ 1,879 |  | $ 4,286 | $ 4,035 |
Operating Revenues — Non-utility operations | 1,440 |  | 996 |  | 3,573 | 2,080 |
Depreciation and amortization | 451 |  | 427 |  | 903 | 850 |
Interest expense | 256 |  | 233 |  | 506 | 451 |
Interest income | (25) |  | (36) |  | (48) | (54) |
Equity earnings (losses) of equity method investees | 4 |  | 32 |  | 11 | 24 |
Other segment items (pre-tax) | 2,503 |  | 1,861 |  | 5,830 | 4,152 |
Income Tax Expense (Benefit) | 1 |  | 36 |  | (17) | 57 |
Net Income (Loss) Attributable to DTE Energy Company | 229 | $ 445 | 322 | $ 313 | 674 | 635 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 128 |  |  |  | 128 |  | $ 128
Capital expenditures and acquisitions |  |  |  |  | 1,844 |  | 4,467
Goodwill | 1,993 |  |  |  | 1,993 |  | 1,993
Total Assets | 50,248 |  |  |  | 50,248 |  | 48,846
Operating segments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 1,998 |  | 1,900 |  | 4,328 | 4,077 |
Operating Revenues — Non-utility operations | 1,497 |  | 1,023 |  | 3,716 | 2,144 |
Depreciation and amortization | 451 |  | 427 |  | 903 | 850 |
Interest expense | 180 |  | 163 |  | 355 | 320 |
Interest income | (29) |  | (30) |  | (56) | (52) |
Equity earnings (losses) of equity method investees | 5 |  | 32 |  | 12 | 25 |
Other segment items (pre-tax) | 2,575 |  | 1,907 |  | 6,008 | 4,253 |
Income Tax Expense (Benefit) | (26) |  | 62 |  | 48 | 129 |
Net Income (Loss) Attributable to DTE Energy Company | 339 |  | 362 |  | 774 | 696 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 106 |  |  |  | 106 |  | 105
Capital expenditures and acquisitions |  |  |  |  | 1,844 |  | 4,467
Goodwill | 1,993 |  |  |  | 1,993 |  | 1,993
Total Assets | 48,622 |  |  |  | 48,622 |  | 47,098
Operating segments | Electric |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 1,682 |  | 1,611 |  | 3,136 | 3,077 |
Operating Revenues — Non-utility operations | 4 |  | 5 |  | 9 | 9 |
Depreciation and amortization | 380 |  | 357 |  | 762 | 710 |
Interest expense | 138 |  | 125 |  | 271 | 243 |
Interest income | (2) |  | (3) |  | (4) | (5) |
Equity earnings (losses) of equity method investees | 0 |  | 0 |  | 0 | 0 |
Other segment items (pre-tax) | 862 |  | 821 |  | 1,688 | 1,633 |
Income Tax Expense (Benefit) | (10) |  | 38 |  | (13) | 56 |
Net Income (Loss) Attributable to DTE Energy Company | 318 |  | 278 |  | 441 | 449 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 5 |  |  |  | 5 |  | 5
Capital expenditures and acquisitions |  |  |  |  | 1,533 |  | 3,659
Goodwill | 1,208 |  |  |  | 1,208 |  | 1,208
Total Assets | 36,731 |  |  |  | 36,731 |  | 35,400
Operating segments | Gas |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 316 |  | 289 |  | 1,192 | 1,000 |
Operating Revenues — Non-utility operations | 0 |  | 0 |  | 0 | 0 |
Depreciation and amortization | 55 |  | 55 |  | 109 | 109 |
Interest expense | 32 |  | 28 |  | 64 | 57 |
Interest income | (4) |  | (5) |  | (6) | (6) |
Equity earnings (losses) of equity method investees | 1 |  | 1 |  | 1 | 1 |
Other segment items (pre-tax) | 224 |  | 195 |  | 747 | 621 |
Income Tax Expense (Benefit) | 2 |  | 3 |  | 65 | 52 |
Net Income (Loss) Attributable to DTE Energy Company | 6 |  | 12 |  | 212 | 166 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 18 |  |  |  | 18 |  | 18
Capital expenditures and acquisitions |  |  |  |  | 278 |  | 740
Goodwill | 743 |  |  |  | 743 |  | 743
Total Assets | 8,698 |  |  |  | 8,698 |  | 8,474
Operating segments | DTE Vantage |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 0 |  | 0 |  | 0 | 0 |
Operating Revenues — Non-utility operations | 169 |  | 181 |  | 357 | 365 |
Depreciation and amortization | 14 |  | 14 |  | 29 | 29 |
Interest expense | 8 |  | 7 |  | 16 | 13 |
Interest income | (21) |  | (19) |  | (41) | (31) |
Equity earnings (losses) of equity method investees | 4 |  | 31 |  | 11 | 24 |
Other segment items (pre-tax) | 146 |  | 107 |  | 293 | 281 |
Income Tax Expense (Benefit) | (13) |  | 8 |  | (21) | 8 |
Net Income (Loss) Attributable to DTE Energy Company | 31 |  | 33 |  | 70 | 41 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 83 |  |  |  | 83 |  | 82
Capital expenditures and acquisitions |  |  |  |  | 31 |  | 65
Goodwill | 25 |  |  |  | 25 |  | 25
Total Assets | 2,224 |  |  |  | 2,224 |  | 2,065
Operating segments | Energy Trading |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 0 |  | 0 |  | 0 | 0 |
Operating Revenues — Non-utility operations | 1,324 |  | 837 |  | 3,350 | 1,770 |
Depreciation and amortization | 2 |  | 1 |  | 3 | 2 |
Interest expense | 2 |  | 3 |  | 4 | 7 |
Interest income | (2) |  | (3) |  | (5) | (10) |
Equity earnings (losses) of equity method investees | 0 |  | 0 |  | 0 | 0 |
Other segment items (pre-tax) | 1,343 |  | 784 |  | 3,280 | 1,718 |
Income Tax Expense (Benefit) | (5) |  | 13 |  | 17 | 13 |
Net Income (Loss) Attributable to DTE Energy Company | (16) |  | 39 |  | 51 | 40 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 0 |  |  |  | 0 |  | 0
Capital expenditures and acquisitions |  |  |  |  | 2 |  | 3
Goodwill | 17 |  |  |  | 17 |  | 17
Total Assets | 969 |  |  |  | 969 |  | 1,159
Corporate and Other |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | 0 |  | 0 |  | 0 | 0 |
Operating Revenues — Non-utility operations | 0 |  | 0 |  | 0 | 0 |
Depreciation and amortization | 0 |  | 0 |  | 0 | 0 |
Interest expense | 99 |  | 87 |  | 193 | 162 |
Interest income | (19) |  | (23) |  | (34) | (33) |
Equity earnings (losses) of equity method investees | (1) |  | 0 |  | (1) | (1) |
Other segment items (pre-tax) | 4 |  | 2 |  | 7 | 5 |
Income Tax Expense (Benefit) | 27 |  | (26) |  | (65) | (72) |
Net Income (Loss) Attributable to DTE Energy Company | (110) |  | (40) |  | (100) | (61) |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 22 |  |  |  | 22 |  | 23
Capital expenditures and acquisitions |  |  |  |  | 0 |  | 0
Goodwill | 0 |  |  |  | 0 |  | 0
Total Assets | 4,861 |  |  |  | 4,861 |  | 4,723
Reclassifications and Eliminations |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Utility operations | (19) |  | (21) |  | (42) | (42) |
Operating Revenues — Non-utility operations | (57) |  | (27) |  | (143) | (64) |
Depreciation and amortization | 0 |  | 0 |  | 0 | 0 |
Interest expense | (23) |  | (17) |  | (42) | (31) |
Interest income | 23 |  | 17 |  | 42 | 31 |
Equity earnings (losses) of equity method investees | 0 |  | 0 |  | 0 | 0 |
Other segment items (pre-tax) | (76) |  | (48) |  | (185) | (106) |
Income Tax Expense (Benefit) | 0 |  | 0 |  | 0 | 0 |
Net Income (Loss) Attributable to DTE Energy Company | 0 |  | 0 |  | 0 | 0 |
Other Financial Data |  |  |  |  |  |  |
Investments in equity method investees | 0 |  |  |  | 0 |  | 0
Capital expenditures and acquisitions |  |  |  |  | 0 |  | 0
Goodwill | 0 |  |  |  | 0 |  | 0
Total Assets | (3,235) |  |  |  | (3,235) |  | $ (2,975)
Reclassifications and Eliminations | Electric |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Operating Revenues — Non-utility operations | $ (1) |  | $ (1) |  | $ (2) | $ (2) |

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