Segment and Related Information (Financial Data) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	$ 2,307	$ 2,156
Operating Revenues — Non-utility operations	2,133	1,084
Depreciation and amortization	452	423
Interest expense	250	218
Interest income	(23)	(18)
Equity earnings (losses) of equity method investees	7	(8)
Other segment items (pre-tax)	3,327	2,291
Income Tax Expense (Benefit)	(18)	21
Net Income	445	313
Other Segment Financial Data
Investments in equity method investees	128		$ 128
Capital expenditures and acquisitions	873		4,467
Goodwill	1,993		1,993
Total Assets	49,555		48,846
Operating segments
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	2,330	2,177
Operating Revenues — Non-utility operations	2,219	1,121
Depreciation and amortization	452	423
Interest expense	175	157
Interest income	(27)	(22)
Equity earnings (losses) of equity method investees	7	(7)
Other segment items (pre-tax)	3,433	2,346
Income Tax Expense (Benefit)	74	67
Net Income	435	334
Other Segment Financial Data
Investments in equity method investees	106		105
Capital expenditures and acquisitions	873		4,467
Goodwill	1,993		1,993
Total Assets	48,167		47,098
Operating segments | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	1,454	1,466
Operating Revenues — Non-utility operations	5	4
Depreciation and amortization	382	353
Interest expense	133	118
Interest income	(2)	(2)
Equity earnings (losses) of equity method investees	0	0
Other segment items (pre-tax)	826	812
Income Tax Expense (Benefit)	(3)	18
Net Income	123	171
Other Segment Financial Data
Investments in equity method investees	5		5
Capital expenditures and acquisitions	731		3,659
Goodwill	1,208		1,208
Total Assets	35,970		35,400
Operating segments | Gas segment
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	876	711
Operating Revenues — Non-utility operations	0	0
Depreciation and amortization	54	54
Interest expense	32	29
Interest income	(2)	(1)
Equity earnings (losses) of equity method investees	0	0
Other segment items (pre-tax)	523	426
Income Tax Expense (Benefit)	63	49
Net Income	206	154
Other Segment Financial Data
Investments in equity method investees	18		18
Capital expenditures and acquisitions	126		740
Goodwill	743		743
Total Assets	8,760		8,474
Operating segments | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0
Operating Revenues — Non-utility operations	188	184
Depreciation and amortization	15	15
Interest expense	8	6
Interest income	(20)	(12)
Equity earnings (losses) of equity method investees	7	(7)
Other segment items (pre-tax)	147	174
Income Tax Expense (Benefit)	(8)	0
Net Income	39	8
Other Segment Financial Data
Investments in equity method investees	83		82
Capital expenditures and acquisitions	15		65
Goodwill	25		25
Total Assets	2,131		2,065
Operating segments | Energy Trading segment
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0
Operating Revenues — Non-utility operations	2,026	933
Depreciation and amortization	1	1
Interest expense	2	4
Interest income	(3)	(7)
Equity earnings (losses) of equity method investees	0	0
Other segment items (pre-tax)	1,937	934
Income Tax Expense (Benefit)	22	0
Net Income	67	1
Other Segment Financial Data
Investments in equity method investees	0		0
Capital expenditures and acquisitions	1		3
Goodwill	17		17
Total Assets	1,306		1,159
Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0
Operating Revenues — Non-utility operations	0	0
Depreciation and amortization	0	0
Interest expense	94	75
Interest income	(15)	(10)
Equity earnings (losses) of equity method investees	0	(1)
Other segment items (pre-tax)	3	3
Income Tax Expense (Benefit)	(92)	(46)
Net Income	10	(21)
Other Segment Financial Data
Investments in equity method investees	22		23
Capital expenditures and acquisitions	0		0
Goodwill	0		0
Total Assets	5,769		4,723
Reconciliation and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	(23)	(21)
Operating Revenues — Non-utility operations	(86)	(37)
Depreciation and amortization	0	0
Interest expense	(19)	(14)
Interest income	19	14
Equity earnings (losses) of equity method investees	0	0
Other segment items (pre-tax)	(109)	(58)
Income Tax Expense (Benefit)	0	0
Net Income	0	0
Other Segment Financial Data
Investments in equity method investees	0		0
Capital expenditures and acquisitions	0		0
Goodwill	0		0
Total Assets	(4,381)		$ (2,975)
Reconciliation and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	$ (1)	$ (1)