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Organization and Basis of Presentation (Details Textuals) customer in Millions, $ in Millions	Mar. 31, 2026 USD ($) customer	Dec. 31, 2025 USD ($)
Variable Interest Entity [Line Items]
Number of electric utility customers \| customer	2.3
Number of gas utility customers \| customer	1.4
Material potential exposure	$ 0
Equity method investments	112	$ 122
Variable interest entity, non-consolidated
Variable Interest Entity [Line Items]
Equity method investments	52	$ 63
DTE Electric
Variable Interest Entity [Line Items]
Material potential exposure	$ 0

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

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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