Regulatory Environment - MGU 2024 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%