Segment and Related Information (Financial Data) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	$ 7,990	$ 7,466	$ 8,243
Operating Revenues — Non-utility operations	4,467	5,279	10,985
Depreciation and amortization	1,732	1,606	1,468
Interest expense	951	791	675
Interest income	(136)	(57)	(46)
Equity earnings (losses) of equity method investees	15	3	(14)
Other segment items (pre-tax)	8,525	8,836	16,033
Income Tax Expense (Benefit)	(34)	169	29
Net Income (Loss) Attributable to DTE Energy Company	1,404	1,397	1,083
Other Segment Financial Data
Investments in equity method investees	128	166	165
Capital expenditures and acquisitions	4,467	3,934	3,378
Goodwill	1,993	1,993	1,993
Total Assets	48,846	44,755	42,683
Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	8,075	7,552	8,321
Operating Revenues — Non-utility operations	4,612	5,435	11,171
Depreciation and amortization	1,732	1,606	1,467
Interest expense	658	567	495
Interest income	(108)	(70)	(50)
Equity earnings (losses) of equity method investees	16	8	2
Other segment items (pre-tax)	8,749	9,060	16,250
Income Tax Expense (Benefit)	51	261	100
Net Income (Loss) Attributable to DTE Energy Company	1,589	1,555	1,228
Other Segment Financial Data
Investments in equity method investees	105	139	132
Capital expenditures and acquisitions	4,467	3,934	3,378
Goodwill	1,993	1,993	1,993
Total Assets	47,098	42,302	40,125
Operating Segments | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	6,277	5,804	6,397
Operating Revenues — Non-utility operations	16	14	15
Depreciation and amortization	1,447	1,340	1,218
Interest expense	498	432	372
Interest income	(7)	(20)	(8)
Equity earnings (losses) of equity method investees	0	0	0
Other segment items (pre-tax)	3,314	3,216	3,849
Income Tax Expense (Benefit)	(31)	78	25
Net Income (Loss) Attributable to DTE Energy Company	1,072	772	956
Other Segment Financial Data
Investments in equity method investees	5	5	6
Capital expenditures and acquisitions	3,659	3,128	2,620
Goodwill	1,208	1,208	1,208
Total Assets	35,400	32,292	30,342
Operating Segments | Gas segment
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	1,798	1,748	1,924
Operating Revenues — Non-utility operations	0	0	0
Depreciation and amortization	221	209	192
Interest expense	118	102	91
Interest income	(10)	(9)	(8)
Equity earnings (losses) of equity method investees	1	1	2
Other segment items (pre-tax)	1,134	1,058	1,287
Income Tax Expense (Benefit)	77	93	88
Net Income (Loss) Attributable to DTE Energy Company	257	294	272
Other Segment Financial Data
Investments in equity method investees	18	16	15
Capital expenditures and acquisitions	740	746	693
Goodwill	743	743	743
Total Assets	8,474	7,722	7,321
Operating Segments | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0	0
Operating Revenues — Non-utility operations	753	809	848
Depreciation and amortization	59	53	52
Interest expense	28	15	15
Interest income	(76)	(32)	(28)
Equity earnings (losses) of equity method investees	15	7	0
Other segment items (pre-tax)	629	635	699
Income Tax Expense (Benefit)	(37)	(22)	18
Net Income (Loss) Attributable to DTE Energy Company	135	153	92
Other Segment Financial Data
Investments in equity method investees	82	118	111
Capital expenditures and acquisitions	65	57	62
Goodwill	25	25	25
Total Assets	2,065	1,122	1,077
Operating Segments | Energy Trading segment
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0	0
Operating Revenues — Non-utility operations	3,843	4,612	10,308
Depreciation and amortization	5	4	5
Interest expense	14	18	17
Interest income	(15)	(9)	(6)
Equity earnings (losses) of equity method investees	0	0	0
Other segment items (pre-tax)	3,672	4,151	10,415
Income Tax Expense (Benefit)	42	112	(31)
Net Income (Loss) Attributable to DTE Energy Company	125	336	(92)
Other Segment Financial Data
Investments in equity method investees	0	0	0
Capital expenditures and acquisitions	3	3	3
Goodwill	17	17	17
Total Assets	1,159	1,166	1,385
Corporate and Other
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0	0
Operating Revenues — Non-utility operations	0	0	0
Depreciation and amortization	0	0	1
Interest expense	351	270	210
Interest income	(86)	(33)	(26)
Equity earnings (losses) of equity method investees	(1)	(5)	(16)
Other segment items (pre-tax)	6	18	47
Income Tax Expense (Benefit)	(85)	(92)	(71)
Net Income (Loss) Attributable to DTE Energy Company	(185)	(158)	(145)
Other Segment Financial Data
Investments in equity method investees	23	27	33
Capital expenditures and acquisitions	0	0	0
Goodwill	0	0	0
Total Assets	4,723	4,150	4,409
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	(85)	(86)	(78)
Operating Revenues — Non-utility operations	(145)	(156)	(186)
Depreciation and amortization	0	0	0
Interest expense	(58)	(46)	(30)
Interest income	58	46	30
Equity earnings (losses) of equity method investees	0	0	0
Other segment items (pre-tax)	(230)	(242)	(264)
Income Tax Expense (Benefit)	0	0	0
Net Income (Loss) Attributable to DTE Energy Company	0	0	0
Other Segment Financial Data
Investments in equity method investees	0	0	0
Capital expenditures and acquisitions	0	0	0
Goodwill	0	0	0
Total Assets	(2,975)	(1,697)	(1,851)
Intersegment Eliminations [Member] | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	$ (3)	$ (3)	$ (6)