Commitments and Contingencies (Details Textuals)	1 Months Ended		3 Months Ended
	Jan. 31, 2021	Jun. 30, 2020	Mar. 31, 2021 USD ($) employee site facility	Apr. 05, 2021 USD ($)	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			$ 4,200,000,000
Allowance for doubtful accounts			$ 123,000,000		$ 104,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee			5,200
Percentage of total employees			49.00%
Vector Pipeline
Loss Contingencies [Line Items]
Ownership interest			40.00%
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			$ 631,000,000
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability			50,000,000
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding			$ 129,000,000
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 Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability			$ 209,000,000
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements			2 months
Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability			$ 335,000,000
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements			2 months
Vector | Revolving Term Credit Facility
Loss Contingencies [Line Items]
Revolving term credit facility amount						$ 70,000,000
Maximum potential payments under line of credit			$ 56,000,000
Vector | NEXUS pipeline
Loss Contingencies [Line Items]
Maximum potential liability			$ 7,000,000
Percentage of payment obligations due			50.00%
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements			15 years
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			$ 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
Allowance for doubtful accounts			$ 59,000,000		57,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Number of employees | employee			2,800
Percentage of total employees			57.00%
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding			$ 73,000,000
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			$ 697,000,000
Estimated impact of the CCR and ELG rules through 2025			$ 552,000,000
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%
DTE Midstream | Reduction of Greenhouse Gas Emissions by 2050
Loss Contingencies [Line Items]
Goal of net greenhouse gas emissions, percentage	0.00%
DTE Midstream | Reduction of Carbon Emissions in the next decade
Loss Contingencies [Line Items]
Commitment to reduce carbon emissions, percentage	30.00%
NEXUS | DTE Gas | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term			15 years
Percentage of payment obligations due			50.00%
NEXUS | Texas Eastern Transmission, LP | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term			15 years
Percentage of payment obligations due			50.00%
NEXUS | Vector | NEXUS pipeline
Loss Contingencies [Line Items]
Agreement term			15 years
DTE Energy Trading | Brilliant
Loss Contingencies [Line Items]
Accounts receivable not recorded as collectability no longer deemed probable			$ 48,000,000
Accounts receivable			12,000,000
Allowance for doubtful accounts			$ 12,000,000
Brilliant | DTE Energy Trading | Subsequent Event
Loss Contingencies [Line Items]
Maximum amount under credit agreement				$ 14,000,000