Jointly-Owned Utility Plant (Jointly-Owned Utility Plants) (Details) - DTE Electric $ in Millions	Dec. 31, 2025 USD ($) MW
Belle River
Jointly-Owned Utility Plant Interests [Line Items]
Total plant capacity \| MW	1,270
Ownership interest	81.00%
Investment in Property, plant, and equipment (in millions)	$ 1,961
Accumulated depreciation (in millions)	$ 1,198
Ludington Hydroelectric Pumped Storage
Jointly-Owned Utility Plant Interests [Line Items]
Total plant capacity \| MW	2,290
Ownership interest	49.00%
Investment in Property, plant, and equipment (in millions)	$ 676
Accumulated depreciation (in millions)	$ 171

Jointly Owned Utility Plant, Capacity

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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.

+ References

No definition available.

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- Definition

The total period end amount of plant in service and construction in progress net of accumulated depreciation for the utility's share of jointly owned electricity generation plant.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 360
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 10.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1

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- Definition

The period end amount of accumulated depreciation in a jointly owned electricity generation plant.

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- Definition

The proportionate share of interest (percent) in a jointly owned utility plant.

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