Segment and Related Information (Financial Data) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	$ 7,466	$ 8,243	$ 7,288
Operating Revenues — Non-utility operations	5,279	10,985	7,676
Depreciation and amortization	1,606	1,468	1,377
Interest expense	791	675	630
Interest income	(57)	(46)	(22)
Equity earnings (losses) of equity method investees	3	(14)	38
Income Tax Expense (Benefit)	169	29	(130)
Net Income (Loss) Attributable to DTE Energy Company	1,397	1,083	907
Investments in equity method investees	166	165
Capital expenditures and acquisitions	3,934	3,378	3,772
Goodwill	1,993	1,993
Total Assets	44,755	42,683	39,719
Loss on extinguishment of debt	0	0	393
Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			7,288
Operating Revenues — Non-utility operations			7,676
Depreciation and amortization			1,377
Interest expense			630
Interest income			(22)
Equity earnings (losses) of equity method investees			38
Income Tax Expense (Benefit)			(130)
Net Income (Loss) Attributable to DTE Energy Company			796
Investments in equity method investees			187
Capital expenditures and acquisitions			3,712
Goodwill			1,993
Total Assets			39,719
Discontinued operations
Segment Reporting Information [Line Items]
Net Income (Loss) Attributable to DTE Energy Company			111
Capital expenditures and acquisitions			60
Total Assets			0
Operating Segments | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	5,804	6,397
Operating Revenues — Non-utility operations	14	15
Depreciation and amortization	1,340	1,218
Interest expense	432	372
Interest income	(20)	(8)
Equity earnings (losses) of equity method investees	0	0
Income Tax Expense (Benefit)	78	25
Net Income (Loss) Attributable to DTE Energy Company	772	956
Investments in equity method investees	5	6
Capital expenditures and acquisitions	3,128	2,620
Goodwill	1,208	1,208
Total Assets	32,292	30,342
Operating Segments | Electric | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			5,809
Operating Revenues — Non-utility operations			12
Depreciation and amortization			1,122
Interest expense			338
Interest income			0
Equity earnings (losses) of equity method investees			0
Income Tax Expense (Benefit)			104
Net Income (Loss) Attributable to DTE Energy Company			864
Investments in equity method investees			6
Capital expenditures and acquisitions			3,016
Goodwill			1,208
Total Assets			28,524
Operating Segments | Gas
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	1,748	1,924
Operating Revenues — Non-utility operations	0	0
Depreciation and amortization	209	192
Interest expense	102	91
Interest income	(9)	(8)
Equity earnings (losses) of equity method investees	1	2
Income Tax Expense (Benefit)	93	88
Net Income (Loss) Attributable to DTE Energy Company	294	272
Investments in equity method investees	16	15
Capital expenditures and acquisitions	746	693
Goodwill	743	743
Total Assets	7,722	7,321
Operating Segments | Gas | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			1,553
Operating Revenues — Non-utility operations			0
Depreciation and amortization			177
Interest expense			81
Interest income			(6)
Equity earnings (losses) of equity method investees			1
Income Tax Expense (Benefit)			38
Net Income (Loss) Attributable to DTE Energy Company			214
Investments in equity method investees			13
Capital expenditures and acquisitions			621
Goodwill			743
Total Assets			6,729
Operating Segments | DTE Vantage
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0
Operating Revenues — Non-utility operations	809	848
Depreciation and amortization	53	52
Interest expense	15	15
Interest income	(32)	(28)
Equity earnings (losses) of equity method investees	7	0
Income Tax Expense (Benefit)	(22)	18
Net Income (Loss) Attributable to DTE Energy Company	153	92
Investments in equity method investees	118	111
Capital expenditures and acquisitions	57	62
Goodwill	25	25
Total Assets	1,122	1,077
Operating Segments | DTE Vantage | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			0
Operating Revenues — Non-utility operations			1,482
Depreciation and amortization			71
Interest expense			28
Interest income			(23)
Equity earnings (losses) of equity method investees			8
Income Tax Expense (Benefit)			(31)
Net Income (Loss) Attributable to DTE Energy Company			168
Investments in equity method investees			118
Capital expenditures and acquisitions			69
Goodwill			25
Total Assets			983
Operating Segments | Energy Trading
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	0	0
Operating Revenues — Non-utility operations	4,612	10,308
Depreciation and amortization	4	5
Interest expense	18	17
Interest income	(9)	(6)
Equity earnings (losses) of equity method investees	0	0
Income Tax Expense (Benefit)	112	(31)
Net Income (Loss) Attributable to DTE Energy Company	336	(92)
Investments in equity method investees	0	0
Capital expenditures and acquisitions	3	3
Goodwill	17	17
Total Assets	1,166	1,385
Operating Segments | Energy Trading | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			0
Operating Revenues — Non-utility operations			6,831
Depreciation and amortization			6
Interest expense			5
Interest income			(1)
Equity earnings (losses) of equity method investees			0
Income Tax Expense (Benefit)			(27)
Net Income (Loss) Attributable to DTE Energy Company			(83)
Investments in equity method investees			0
Capital expenditures and acquisitions			6
Goodwill			17
Total Assets			1,174
Operating Segments | 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	1
Interest expense	270	210
Interest income	(33)	(26)
Equity earnings (losses) of equity method investees	(5)	(16)
Income Tax Expense (Benefit)	(92)	(71)
Net Income (Loss) Attributable to DTE Energy Company	(158)	(145)
Investments in equity method investees	27	33
Capital expenditures and acquisitions	0	0
Goodwill	0	0
Total Assets	4,150	4,409
Loss on extinguishment of debt			376
Deferred tax benefit for deferred tax remeasurement			85
Operating Segments | Corporate and Other | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			0
Operating Revenues — Non-utility operations			2
Depreciation and amortization			1
Interest expense			270
Interest income			(84)
Equity earnings (losses) of equity method investees			29
Income Tax Expense (Benefit)			(214)
Net Income (Loss) Attributable to DTE Energy Company			(367)
Investments in equity method investees			50
Capital expenditures and acquisitions			0
Goodwill			0
Total Assets			4,281
Reclassifications and Eliminations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations	(86)	(78)
Operating Revenues — Non-utility operations	(156)	(186)
Depreciation and amortization	0	0
Interest expense	(46)	(30)
Interest income	46	30
Equity earnings (losses) of equity method investees	0	0
Income Tax Expense (Benefit)	0	0
Net Income (Loss) Attributable to DTE Energy Company	0	0
Investments in equity method investees	0	0
Capital expenditures and acquisitions	0	0
Goodwill	0	0
Total Assets	(1,697)	(1,851)
Reclassifications and Eliminations | Continuing operations
Segment Reporting Information [Line Items]
Operating Revenues — Utility operations			(74)
Operating Revenues — Non-utility operations			(651)
Depreciation and amortization			0
Interest expense			(92)
Interest income			92
Equity earnings (losses) of equity method investees			0
Income Tax Expense (Benefit)			0
Net Income (Loss) Attributable to DTE Energy Company			0
Investments in equity method investees			0
Capital expenditures and acquisitions			0
Goodwill			0
Total Assets			(1,972)
Reclassifications and Eliminations | Electric
Segment Reporting Information [Line Items]
Operating Revenues — Non-utility operations	$ (3)	$ (6)	$ (4)