Property, Plant, and Equipment (AFUDC and Interest Capitalized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Allowance for debt funds used during construction and interest capitalized	$ 47	$ 36	$ 20
Allowance for equity funds used during construction	105	86	42
Total	152	122	62
DTE Electric
Property, Plant, and Equipment [Line Items]
Allowance for debt funds used during construction	45	34	15
Allowance for equity funds used during construction	103	84	40
Total	$ 148	$ 118	$ 55