v3.25.4

Plant, Property, and Equipment (Summary of Composite Depreciation Rates for Properties) (Details) - Consumers Energy Company | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Electric utility property |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Composite depreciation rate | 3.60% | 3.60% | 3.80%
Gas utility property |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Composite depreciation rate | 2.50% | 2.50% | 2.80%
Other property |  |  |
Public Utility, Property, Plant and Equipment [Line Items] |  |  |
Composite depreciation rate | 7.00% | 7.10% | 7.80%

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