REGULATORY ENVIRONMENT - WI 2023 AND 2024 RATES (Details) - Public Service Commission of Wisconsin (PSCW) - USD ($)		1 Months Ended
	Sep. 29, 2022	Jul. 31, 2022	Sep. 30, 2022
Public Utilities, Rate Matters, Requested
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%
Percentage of additional earnings between 15 and 75 basis points refunded to customers	50.00%
Return on equity in excess of first 15 basis points above authorized amount (as a percent)	0.60%
Percentage of earnings in excess of 75 basis points refunded to customers	100.00%
Commitments to contribute to Keep Wisconsin Warm Fund	$ 4,000,000
WE
Public Utilities, Rate Matters, Requested
Requested common equity component average (as a percent)	53.00%
Requested return on equity (as a percent)	10.00%
WE | Electric rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 257,900,000
Requested rate increase (as a percent)	8.30%
Decrease in customer monthly fixed charges	$ 1.00
WE | Electric rates | OCPP
Public Utilities, Rate Matters, Requested
Securitization of environmental control costs	$ 100,000,000
WE | Electric rates | OCPP | Plant retirement related items
Public Utilities, Rate Matters, Requested
Recovery period of remaining book value	25 years
WE | Electric rates | OCPP Units 5 and 6
Public Utilities, Rate Matters, Requested
Delay in plant retirements		1 year
WE | Electric rates | OCPP Units 7 and 8
Public Utilities, Rate Matters, Requested
Delay in plant retirements		18 months
WE | Natural gas rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 53,300,000
Requested rate increase (as a percent)	11.20%
WE | Steam rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 3,400,000
Requested rate increase (as a percent)	15.60%
WPS
Public Utilities, Rate Matters, Requested
Requested common equity component average (as a percent)	53.00%
Requested return on equity (as a percent)	10.00%
WPS | Columbia Energy Center Units 1 and 2
Public Utilities, Rate Matters, Requested
Joint plant ownership percentage			27.50%
WPS | Electric rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 104,300,000
Requested rate increase (as a percent)	8.70%
Decrease in customer monthly fixed charges	$ 2.00
WPS | Natural gas rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 31,300,000
Requested rate increase (as a percent)	8.60%
WG
Public Utilities, Rate Matters, Requested
Requested common equity component average (as a percent)	53.00%
Requested return on equity (as a percent)	10.20%
WG | Natural gas rates
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 57,100,000
Requested rate increase (as a percent)	7.90%