Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Regulatory Assets [Line Items]
Regulatory assets	$ 6,317	$ 4,336
Less amount included in Current Assets	(108)	(450)
Regulatory assets, noncurrent	6,209	3,886
Securitized regulatory assets	758	206
Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	2,736	594
Pension
Regulatory Assets [Line Items]
Regulatory assets	1,421	1,362
Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	163	172
Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	952	972
Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	223	19
Enhanced tree trimming program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	157	90
Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	133	148
Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	90	88
Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	89	76
Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	55	450
Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	46	46
Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	41	45
Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	38	42
Advanced distribution management system costs
Regulatory Assets [Line Items]
Regulatory assets	18	14
Deferred pension costs
Regulatory Assets [Line Items]
Regulatory assets	16	63
Nuclear performance evaluation and review committee tracker
Regulatory Assets [Line Items]
Regulatory assets	6	26
Other
Regulatory Assets [Line Items]
Regulatory assets	133	129
DTE Electric
Regulatory Assets [Line Items]
Regulatory assets	5,695	3,640
Less amount included in Current Assets	(99)	(421)
Regulatory assets, noncurrent	5,596	3,219
Securitized regulatory assets	758	206
DTE Electric | Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	2,736	594
DTE Electric | Pension
Regulatory Assets [Line Items]
Regulatory assets	1,045	997
DTE Electric | Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	67	60
DTE Electric | Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	952	972
DTE Electric | Removal costs asset
Regulatory Assets [Line Items]
Regulatory assets	223	19
DTE Electric | Enhanced tree trimming program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	157	90
DTE Electric | Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	110	121
DTE Electric | Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	72	71
DTE Electric | Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	80	68
DTE Electric | Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	55	421
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	31	34
DTE Electric | Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	38	42
DTE Electric | Advanced distribution management system costs
Regulatory Assets [Line Items]
Regulatory assets	18	14
DTE Electric | Deferred pension costs
Regulatory Assets [Line Items]
Regulatory assets	10	41
DTE Electric | Nuclear performance evaluation and review committee tracker
Regulatory Assets [Line Items]
Regulatory assets	6	26
DTE Electric | Other
Regulatory Assets [Line Items]
Regulatory assets	$ 95	$ 70