Commitments and Contingencies (Details Textuals)	1 Months Ended	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2021 USD ($) employee facility site	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Estimated capital expenditures and contributions to equity method investees for current fiscal year		$ 3,900,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee		5,100
Percentage of total employees		50.00%
Workforce Subject to Collective Bargaining Arrangements Expiring within One Year | Labor force concentration risk
Loss Contingencies [Line Items]
Percentage of total employees		16.00%
Synthetic fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability		$ 400,000,000
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations		90 days
Maximum potential liability		$ 698,000,000
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability		40,000,000
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 171,000,000
Reduction of Carbon Emissions by 2023
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage		32.00%
Reduction of Carbon Emissions by 2028
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage		50.00%
Reduction of Carbon Emissions by 2040
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage		80.00%
DTE Electric
Loss Contingencies [Line Items]
Environmental capital expenditures		$ 2,400,000,000
Estimated environmental capital expenditures		$ 0
Number of former MGP sites | site		3
Accrued for remediation		$ 13,000,000	$ 10,000,000
Number of permitted engineered ash storage facilities owned | facility		3
Estimated capital expenditures and contributions to equity method investees for current fiscal year		$ 3,000,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee		2,700
Percentage of total employees		57.00%
DTE Electric | Workforce Subject to Collective Bargaining Arrangements Expiring within One Year | Labor force concentration risk
Loss Contingencies [Line Items]
Percentage of total employees		21.00%
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 120,000,000
DTE Electric | Reduction of Carbon Emissions by 2050
Loss Contingencies [Line Items]
Goal of net carbon emissions, percentage		0.00%
DTE Electric | Coal Combustion Residual And Effluent Limitations Guidelines Rules
Loss Contingencies [Line Items]
Estimated impact of the CCR and ELG rules		$ 661,000,000
Estimated impact of the CCR and ELG rules through 2025		$ 516,000,000
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site		14
Accrued for remediation		$ 24,000,000	$ 24,000,000
Amortization period (in years)		10 years
DTE Gas | Clean up completed and site closed
Loss Contingencies [Line Items]
Number of former MGP sites | site		8
DTE Gas | Partial closure complete
Loss Contingencies [Line Items]
Number of former MGP sites | site		4
DTE Gas | Reduction of Greenhouse Gas Emissions by 2050
Loss Contingencies [Line Items]
Goal of net greenhouse gas emissions, percentage	0.00%