REGULATORY ENVIRONMENT - 2022 RATES (Details) - 2022 Rates - Public Service Commission of Wisconsin (PSCW)	1 Months Ended
Sep. 30, 2021
Public Utilities, General Disclosures
Period to forego filing a rate case	1 year
Percentage of first 15 basis points of additional earnings retained by the utility	100.00%
Return on equity in excess of authorized amount (as a percent)	0.15%

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