Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Regulatory assets	$ 6,821	$ 6,317
Less amount included in Current Assets	(50)	(108)
Regulatory assets, noncurrent	6,771	6,209
Securitized regulatory assets	690	758
Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	2,986	2,736
Pension
Regulatory Assets [Line Items]
Regulatory assets	1,315	1,421
Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	91	163
Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	951	952
Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	501	223
Enhanced tree trimming program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	211	157
Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	119	133
Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	116	89
Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	102	90
Renewable ITC offset
Regulatory Assets [Line Items]
Regulatory assets	89	0
Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	43	46
Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	38	41
Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	34	38
Ludington contract dispute costs
Regulatory Assets [Line Items]
Regulatory assets	31	10
Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	0	55
Other
Regulatory Assets [Line Items]
Regulatory assets	194	163
DTE Electric
Regulatory Assets [Line Items]
Regulatory assets	6,226	5,695
Less amount included in Current Assets	(39)	(99)
Regulatory assets, noncurrent	6,187	5,596
Securitized regulatory assets	690	758
DTE Electric | Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	2,986	2,736
DTE Electric | Pension
Regulatory Assets [Line Items]
Regulatory assets	971	1,045
DTE Electric | Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	0	67
DTE Electric | Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	951	952
DTE Electric | Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	501	223
DTE Electric | Enhanced tree trimming program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	211	157
DTE Electric | Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	99	110
DTE Electric | Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	107	80
DTE Electric | Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	82	72
DTE Electric | Renewable ITC offset
Regulatory Assets [Line Items]
Regulatory assets	89	0
DTE Electric | Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	0	0
DTE Electric | Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	29	31
DTE Electric | Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	34	38
DTE Electric | Ludington contract dispute costs
Regulatory Assets [Line Items]
Regulatory assets	31	10
DTE Electric | Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	0	55
DTE Electric | Other
Regulatory Assets [Line Items]
Regulatory assets	$ 135	$ 119