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PROPERTY, PLANT, AND EQUIPMENT - COLUMBIA UNITS 1 AND 2 (Details) $ in Millions	Sep. 30, 2025 USD ($)
WPS | Columbia Energy Center
Property, plant, and equipment
Net book value of plant to be evaluated for conversion to natural gas	$ 239.9

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

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Period end amount of total net PPE.

+ References

No definition available.

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