Income Taxes (Details Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Loss Carryforwards [Line Items]
Accounts receivable	$ 2,031,000,000	$ 1,690,000,000
Deferred tax asset, general business tax credit carryforwards	1,600,000,000
State and local net operating loss carryforwards	51,000,000	68,000,000
Valuation allowance	46,000,000	25,000,000
Valuation allowance charitable contributions carryforward	16,000,000
Unrecognized tax benefits	0	0
Interest expense on income taxes	0	0	$ 0
Accrued interest on income taxes	0	0	0
State and local net operating loss carryforwards
Operating Loss Carryforwards [Line Items]
Valuation allowance	15,000,000	16,000,000
Charitable Contributions Carryforward
Operating Loss Carryforwards [Line Items]
Valuation allowance	30,000,000	3,000,000
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	856,000,000
DTE Electric
Operating Loss Carryforwards [Line Items]
State and local net operating loss carryforwards	27,000,000	42,000,000
Valuation allowance	0	5,000,000
Unrecognized tax benefits	0	0
Interest expense on income taxes	0	0	0
Accrued interest on income taxes	0	0	$ 0
DTE Electric | General Business Credits
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	512,000,000
DTE Electric | Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	112,000,000
Federal Income Taxes | DTE Energy | DTE Electric
Operating Loss Carryforwards [Line Items]
Accounts receivable	$ 1,000,000	$ 5,000,000