v3.25.4

Plant, Property, and Equipment (Summary of Average Capitalization Rates) (Details) - Consumers Energy Company | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Electric Utility |  |  |
Property, Plant and Equipment [Line Items] |  |  |
AFUDC capitalization rate | 6.90% | 6.90% | 6.50%
Gas Utility |  |  |
Property, Plant and Equipment [Line Items] |  |  |
AFUDC capitalization rate | 5.90% | 5.80% | 5.80%

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