Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Dividends declared	$ 921	$ 859	$ 800
Dividends paid	871	810	752
DTE Electric
Related Party Transaction [Line Items]
Dividends declared	846	776	1,002
Dividends paid	846	776	1,002
DTE Electric | DTE Energy
Related Party Transaction [Line Items]
Dividends declared	846	776	1,002
Dividends paid	846	776	1,002
Capital contribution from DTE Energy	$ 954	$ 634	759
DTE Electric | Affiliates
Related Party Transaction [Line Items]
Weighted average interest rate	3.90%	4.70%
DTE Electric | Energy sales
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	$ 12	$ 11	11
DTE Electric | Other services and interest
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	0	0	3
DTE Electric | Shared capital assets
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	55	58	58
DTE Electric | Fuel and purchased power
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	85	65	50
DTE Electric | Other services and interest
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	20	4	2
DTE Electric | Corporate expenses
Related Party Transaction [Line Items]
Revenues and Other Income/ Costs	$ 349	$ 342	$ 299