v3.25.2
Long-Term Debt (Debt Issuances) (Details)
$ in Millions
Jun. 30, 2025
USD ($)
Debt Instrument [Line Items]  
Amount $ 2,400
Senior Notes | February 2025 5.20% Senior Notes Maturing In 2030  
Debt Instrument [Line Items]  
Interest Rate 5.20%
Amount $ 1,100
Mortgage Bonds | May 2025 5.25% Mortgage Bonds Maturing In 2035 | DTE Electric  
Debt Instrument [Line Items]  
Interest Rate 5.25%
Amount $ 500
Mortgage Bonds | May 2025 5.85% Mortgage Bonds Maturing In 2055 | DTE Electric  
Debt Instrument [Line Items]  
Interest Rate 5.85%
Amount $ 500
Mortgage Bonds | May 2025 4.25% Mortgage Bonds Maturing In 2027 | DTE Electric  
Debt Instrument [Line Items]  
Interest Rate 4.25%
Amount $ 300