Acquisition (Details Textuals) - Electric segment - Osaka Gas USA Corporation - DTE Sustainable Generation $ in Millions		12 Months Ended
	Aug. 14, 2025 MW	Dec. 31, 2025 USD ($)
Business Combination [Line Items]
Amount of power associated with purchase of renewable energy project | MW	123
Consideration paid for entity acquired, paid in cash | $		$ 216
Contract intangibles
Business Combination [Line Items]
Intangible assets, amortization period (in years)	5 years