Long-Term Financings (Details Textuals) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 31, 2026	Dec. 31, 2025	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2026	Sep. 30, 2025	Nov. 05, 2026
Debt Instrument [Line Items]
Debt redeemed					$ 230	$ 1,200
At-the-Market Program
Debt Instrument [Line Items]
Authorized aggregate, amount		$ 1,500
Number of shares issued under equity forward sale agreements (in shares)			1.2	2.5
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share)			$ 141.96	$ 144.41
DTE Electric
Debt Instrument [Line Items]
Debt redeemed					230	$ 400
Securitization Bonds | DTE Electric
Debt Instrument [Line Items]
Debt redeemed					230
Securitization Bonds 5.20% | Securitization Bonds | Subsequent Event | DTE Electric
Debt Instrument [Line Items]
Debt instrument, face amount							$ 412
Interest Rate							5.20%
Securitization Bonds 5.61% | Securitization Bonds | Subsequent Event | DTE Electric
Debt Instrument [Line Items]
Debt instrument, face amount							$ 188
Interest Rate							5.61%
2016 Series E 2.85% Senior Notes | Senior Notes | Subsequent Event
Debt Instrument [Line Items]
Interest Rate	2.85%
Debt redeemed	$ 600
Department Of Energy Title 17 Loan | DTE Gas
Debt Instrument [Line Items]
Debt instrument, face amount			$ 1,600
Debt drawn					$ 0