Commitments and Contingencies (Details Textuals)	3 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) employee site	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)
Loss Contingencies [Line Items]
Asset retirement obligations		$ 4,469,000,000		$ 4,031,000,000
Capital expenditures estimated for next year		$ 6,800,000,000
Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Approximate number of employees | employee		4,850
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%
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		383,000,000
Performance surety bonds | Energy Trading segment
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 91,000,000
Performance surety bonds | Energy Trading segment | Minimum
Loss Contingencies [Line Items]
Performance bonds term (in years)		1 year
Performance surety bonds | Energy Trading segment | Maximum
Loss Contingencies [Line Items]
Performance bonds term (in years)		3 years
Penalties Related to EES Coke | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency accrual		$ 8,000,000
DTE Electric
Loss Contingencies [Line Items]
Environmental capital expenditures		2,400,000,000
Estimated capital expenditures		$ 0
Number of former MGP sites | site		3
Accrued for remediation		$ 10,000,000		10,000,000
Asset retirement obligations		4,217,000,000		3,791,000,000
Capital expenditures estimated for next year		$ 5,200,000,000
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk
Loss Contingencies [Line Items]
Approximate number of employees | employee		2,600
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		22.00%
DTE Electric | Performance surety bonds
Loss Contingencies [Line Items]
Performance bonds outstanding		$ 248,000,000
DTE Electric | Ludington Plant Contract Dispute | Pending Litigation | Minimum
Loss Contingencies [Line Items]
Estimated impact of contingencies		350,000,000
DTE Electric | Ludington Plant Contract Dispute | Pending Litigation | Maximum
Loss Contingencies [Line Items]
Estimated impact of contingencies		400,000,000
DTE Electric | Legacy CCR Surface Impoundments And CCR Management Units
Loss Contingencies [Line Items]
Asset retirement obligations		430,000,000
Asset retirement obligation, period increase	$ 130,000,000
DTE Electric | CCR and ELG Rules
Loss Contingencies [Line Items]
Estimated impact of contingencies		$ 424,000,000
DTE Gas
Loss Contingencies [Line Items]
Number of former MGP sites | site		14
Accrued for remediation		$ 25,000,000		$ 26,000,000
Amortization period (in years)		10 years
DTE Gas | Cleanup completed and site closed
Loss Contingencies [Line Items]
Number of former MGP sites | site		8
DTE Gas | Partial closure completed
Loss Contingencies [Line Items]
Number of former MGP sites | site		5
Toshiba America Energy Systems and Toshiba Corporation | Ludington Plant Contract Dispute | Pending Litigation | DTE Electric and Consumers Energy Company
Loss Contingencies [Line Items]
Damages sought			$ 15,000,000