Commitments and Contingencies (Details Textuals)	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2021 USD ($) employee	Jun. 30, 2021 USD ($) employee facility site	Dec. 31, 2020 USD ($)	Jul. 31, 2019 CAD ($)
Loss Contingencies [Line Items]
Estimated capital expenditures and contributions to equity method investees for current fiscal year		$ 3,900,000,000	$ 3,900,000,000
Receivables reserved		$ 115,000,000	$ 115,000,000	$ 104,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee		5,200	5,200
Percentage of total employees			49.00%
Synthetic fuel
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations			90 days
Maximum potential liability		$ 400,000,000	$ 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		617,000,000	$ 617,000,000
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability		50,000,000	50,000,000
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		176,000,000	176,000,000
Vector | Revolving Term Credit Facility
Loss Contingencies [Line Items]
Financing receivables					$ 70,000,000
Maximum potential payments under line of credit		56,000,000	$ 56,000,000
Reduction of Carbon Emissions by 2023
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage			32.00%
Reduction of Carbon Emissions by 2030
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	$ 2,400,000,000
Estimated environmental capital expenditures			$ 0
Number of former MGP sites | site			3
Accrued for remediation		10,000,000	$ 10,000,000	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		3,000,000,000.0	$ 3,000,000,000.0
Receivables reserved		$ 56,000,000	$ 56,000,000	57,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee		2,700	2,700
Percentage of total employees			57.00%
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 120,000,000	$ 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		718,000,000	$ 718,000,000
Estimated impact of the CCR and ELG rules through 2025		573,000,000	$ 573,000,000
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site			14
Accrued for remediation		23,000,000	$ 23,000,000	$ 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%
DTE Energy Trading | Brilliant
Loss Contingencies [Line Items]
Receivables reserved		9,000,000	$ 9,000,000
Receivables recovered		$ 3,000,000