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Regulatory Environment - MGU 2023 Rate Order (Details) - MPSC - MGU - USD ($) $ in Millions |  | 1 Months Ended
--- | --- | ---
Aug. 30, 2023 | Sep. 30, 2024
Public Utilities, General Disclosures |  |
Approved rate increase | $ 9.9 | $ 7.0
Approved rate increase (as a percent) | 4.70% | 3.88%
Approved return on equity (as a percent) | 9.80% | 9.86%
Approved common equity component average (as a percent) | 51.00% | 50.00%

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