v3.25.4

Stock-based Compensation (Summary of Weighted-average Grant-date Fair Value) (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Restricted stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in dollars per share) | $ 50.19 | $ 44.76 | $ 52.62
Restricted stock | Consumers Energy Company |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in dollars per share) | 49.86 | 44.49 | 52.42
Restricted stock units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in dollars per share) | 56.80 | 52.43 | 50.32
Restricted stock units | Consumers Energy Company |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted (in dollars per share) | $ 56.80 | $ 52.46 | $ 50.34

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