Short-Term Credit Arrangements and Borrowings (Details Textuals)	Oct. 31, 2026 USD ($)	Sep. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 4,325,000,000
DTE Electric
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 1,900,000,000
Total funded debt to capitalization ratio		0.55
DTE Gas
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 300,000,000
Total funded debt to capitalization ratio		0.52
Maximum | DTE Electric
Short-term Debt [Line Items]
Total funded debt to capitalization ratio		0.65
Maximum | DTE Gas
Short-term Debt [Line Items]
Total funded debt to capitalization ratio		0.65
DTE Energy
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 2,125,000,000
Total funded debt to capitalization ratio		0.67
DTE Energy | Demand financing agreement
Short-term Debt [Line Items]
Maximum borrowing capacity, financing agreement		$ 200,000,000
Amount outstanding		$ 86,000,000	$ 94,000,000
DTE Energy | Maximum
Short-term Debt [Line Items]
Total funded debt to capitalization ratio		0.70
DTE Energy | DTE Energy Revolver | Letters of credit
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 500,000,000
DTE Energy | Unsecured Term Loan Matures In September 2027 | Unsecured term loan | Subsequent Event
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 600,000,000