Commitments and Contingencies (Details)		3 Months Ended	12 Months Ended
	Feb. 17, 2026 USD ($)	Mar. 31, 2026 USD ($) employee site	Dec. 31, 2022 USD ($)	Dec. 31, 2025 USD ($)
Loss Contingencies [Line Items]
Asset retirement obligations		$ 4,536,000,000		$ 4,469,000,000
Estimated capital expenditures for current fiscal year		6,800,000,000
Penalties Related to EES Coke | Pending litigation
Loss Contingencies [Line Items]
Civil penalty accrued	$ 100,000,000
Loss contingency accrual, period increase		112,000,000
Loss contingency accrual		$ 120,000,000
Penalties For Installation of Pollution Controls and Establishing and Funding an Action Committee for Community Air Quality Improvement Projects | Pending litigation
Loss Contingencies [Line Items]
Remediation costs	$ 20,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Entity number of employees | employee		4,800
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		18.00%
Reduced emissions fuel guarantees
Loss Contingencies [Line Items]
Number of days after expiration of statutes of limitations (in days)		90 days
Maximum potential liability		$ 201,000,000
Other guarantees
Loss Contingencies [Line Items]
Maximum potential liability		69,000,000
Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		376,000,000
Performance surety bonds | Energy Trading segment
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 91,000,000
Performance surety bonds | Minimum | Energy Trading segment
Loss Contingencies [Line Items]
Performance bonds term (in years)		1 year
Performance surety bonds | Maximum | Energy Trading segment
Loss Contingencies [Line Items]
Performance bonds term (in years)		3 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
Asset retirement obligations		4,281,000,000		4,217,000,000
Estimated capital expenditures for current fiscal year		$ 5,200,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Entity number of employees | employee		2,550
Percentage of total employees		58.00%
DTE Electric | Workforce subject to collective bargaining arrangements expiring within one year | Labor force concentration risk
Loss Contingencies [Line Items]
Percentage of total employees		26.00%
DTE Electric | Minimum | Ludington Plant Contract Dispute | Pending litigation
Loss Contingencies [Line Items]
Estimated impact of loss contingency		$ 350,000,000
DTE Electric | Maximum | Ludington Plant Contract Dispute | Pending litigation
Loss Contingencies [Line Items]
Estimated impact of loss contingency		400,000,000
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		272,000,000
DTE Electric | Legacy CCR Surface Impoundments And CCR Management Units
Loss Contingencies [Line Items]
Asset retirement obligations		415,000,000
DTE Electric | Coal Combustion Residual and Effluent Limitations Guidelines Rules, capital expenditures
Loss Contingencies [Line Items]
Estimated impact of loss contingency		$ 369,000,000
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site		14
Accrued for remediation		$ 25,000,000		$ 25,000,000
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		5
TAES and Toshiba Corporation | Ludington Plant Contract Dispute | DTE Electric and Consumers | Pending litigation
Loss Contingencies [Line Items]
Damages sought			$ 15,000,000