Segment and Related Information (Details Textuals) customer in Millions	9 Months Ended
	Sep. 30, 2026 customer segment
Segment Reporting [Line Items]
Number of reportable segments | segment	4
Number of electric utility customers | customer	2.3
Number of gas utility customers | customer	1.4
DTE Electric
Segment Reporting [Line Items]
Number of reportable segments | segment	1