Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Regulatory Assets [Line Items]
Regulatory assets	$ 3,677	$ 4,254
Less amount included in Current Assets	(195)	(129)
Regulatory assets, noncurrent	3,482	4,125
Pension
Regulatory Assets [Line Items]
Regulatory assets	1,372	1,938
Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	53	165
Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	667	664
Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	613	645
Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	163	176
Enhanced Tree Trimming Program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	189	119
Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	160	100
Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	68	64
Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	79	62
Deferred environmental costs
Regulatory Assets [Line Items]
Regulatory assets	51	57
Unamortized loss on reacquired debt
Regulatory Assets [Line Items]
Regulatory assets	51	55
Nuclear Performance Evaluation and Review Committee Tracker
Regulatory Assets [Line Items]
Regulatory assets	39	55
Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	46	51
Non-service pension and other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	25	21
Energy Waste Reduction
Regulatory Assets [Line Items]
Regulatory assets	20	19
Other recoverable income taxes
Regulatory Assets [Line Items]
Regulatory assets	16	19
Transitional Reconciliation Mechanism
Regulatory Assets [Line Items]
Regulatory assets	8	11
Other
Regulatory Assets [Line Items]
Regulatory assets	57	33
DTE Electric
Regulatory Assets [Line Items]
Regulatory assets	3,136	3,563
Less amount included in Current Assets	(168)	(123)
Regulatory assets, noncurrent	2,968	3,440
DTE Electric | Pension
Regulatory Assets [Line Items]
Regulatory assets	1,056	1,477
DTE Electric | Other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	27	108
DTE Electric | Recoverable undepreciated costs on retiring plants
Regulatory Assets [Line Items]
Regulatory assets	667	664
DTE Electric | Fermi 2 asset retirement obligation
Regulatory Assets [Line Items]
Regulatory assets	613	645
DTE Electric | Recoverable Michigan income taxes
Regulatory Assets [Line Items]
Regulatory assets	133	142
DTE Electric | Enhanced Tree Trimming Program deferred costs
Regulatory Assets [Line Items]
Regulatory assets	189	119
DTE Electric | Accrued PSCR/GCR revenue
Regulatory Assets [Line Items]
Regulatory assets	142	100
DTE Electric | Recoverable income taxes related to AFUDC equity
Regulatory Assets [Line Items]
Regulatory assets	61	54
DTE Electric | Energy Waste Reduction incentive
Regulatory Assets [Line Items]
Regulatory assets	63	49
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	38	41
DTE Electric | Nuclear Performance Evaluation and Review Committee Tracker
Regulatory Assets [Line Items]
Regulatory assets	39	55
DTE Electric | Customer360 deferred costs
Regulatory Assets [Line Items]
Regulatory assets	46	51
DTE Electric | Non-service pension and other postretirement costs
Regulatory Assets [Line Items]
Regulatory assets	0	0
DTE Electric | Energy Waste Reduction
Regulatory Assets [Line Items]
Regulatory assets	0	0
DTE Electric | Other recoverable income taxes
Regulatory Assets [Line Items]
Regulatory assets	16	19
DTE Electric | Transitional Reconciliation Mechanism
Regulatory Assets [Line Items]
Regulatory assets	8	11
DTE Electric | Other
Regulatory Assets [Line Items]
Regulatory assets	$ 38	$ 28