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REGULATORY ENVIRONMENT - WI 2023 AND 2024 RATES (Details) - Public Service Commission of Wisconsin (PSCW) - USD ($) $ in Millions	1 Months Ended		6 Months Ended
	Jul. 31, 2022	Apr. 30, 2022	Jun. 30, 2022
Public Utilities, Rate Matters, Requested
Percentage of first 25 basis points of additional earnings retained by the utility		100.00%
Return on equity in excess of authorized amount (as a percent)		0.25%
Percentage of additional earnings between 25 and 75 basis points refunded to customers		50.00%
Return on equity in excess of first 25 basis points above authorized amount (as a percent)		0.50%
Percentage of earnings in excess of 75 basis points refunded to customers		100.00%
WE
Public Utilities, Rate Matters, Requested
Requested return on equity (as a percent)		10.00%
Requested common equity component average (as a percent)		53.00%
Public Utilities, Rate Matters, Approved
Approved common equity component average (as a percent)			52.50%
WE | Subsequent event
Public Utilities, Rate Matters, Requested
Aggregate increase from original request	$ 30.0
WE | Electric rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 285.6
Requested rate increase (as a percent)	9.20%
WE | Natural gas rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 55.4
Requested rate increase (as a percent)	11.70%
WE | Steam rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 3.6
Requested rate increase (as a percent)	16.50%
WE | OCPP Units 5 and 6 | Subsequent event
Public Utilities, Rate Matters, Requested
Delay in plant retirements	1 year
WE | OCPP Units 7 and 8 | Subsequent event
Public Utilities, Rate Matters, Requested
Delay in plant retirements	18 months
WPS
Public Utilities, Rate Matters, Requested
Requested return on equity (as a percent)		10.00%
Requested common equity component average (as a percent)		53.00%
Public Utilities, Rate Matters, Approved
Approved common equity component average (as a percent)			52.50%
WPS | Subsequent event
Public Utilities, Rate Matters, Requested
Aggregate increase from original request	$ 6.0
WPS | Electric rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 79.4
Requested rate increase (as a percent)	6.60%
WPS | Natural gas rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 30.9
Requested rate increase (as a percent)	8.40%
WPS | Columbia Energy Center Units 1 and 2
Public Utilities, Rate Matters, Requested
Joint plant ownership percentage			27.50%
WG
Public Utilities, Rate Matters, Requested
Requested return on equity (as a percent)		10.20%
Requested common equity component average (as a percent)		53.00%
Public Utilities, Rate Matters, Approved
Approved common equity component average (as a percent)			52.50%
WG | Subsequent event
Public Utilities, Rate Matters, Requested
Aggregate increase from original request	$ 2.0
WG | Natural gas rates | Subsequent event
Public Utilities, Rate Matters, Requested
Requested rate increase	$ 61.9
Requested rate increase (as a percent)	8.60%

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The proportionate share of interest (percent) in a jointly owned utility plant.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 10.C)
-URI http://asc.fasb.org/extlink&oid=122136288&loc=d3e659983-123033

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