Long-Term Financings (Debt Issuances) (Details) - DTE Electric $ in Millions	Jun. 30, 2026 USD ($)
Mortgages
Debt Instrument [Line Items]
Amount	$ 2,600
Mortgages \| February 2026 4.85% Mortgage Bonds Maturing In 2036
Debt Instrument [Line Items]
Interest Rate	4.85%
Amount	$ 800
Mortgages \| February 2026 5.55% Mortgage Bonds Maturing In 2056
Debt Instrument [Line Items]
Interest Rate	5.55%
Amount	$ 800
Junior Subordinated Debentures
Debt Instrument [Line Items]
Interest Rate	6.20%
Amount	$ 1,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details