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PROPERTY, PLANT, AND EQUIPMENT - PLANT TO BE RETIRED (Details) - WPS $ in Millions | Mar. 31, 2022 USD ($)
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Columbia Energy Center Unit 1 |
Property, plant, and equipment |
Net book value of plant to be retired | $ 87.9
Columbia Energy Center Unit 2 |
Property, plant, and equipment |
Net book value of plant to be retired | $ 186.2

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