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Property, Plant and Equipment (Narrative) (Details)	6 Months Ended
	Jun. 30, 2022 MW
Edgewater Generating Station | WPL [Member]
Property, Plant and Equipment [Line Items]
Nameplate Capacity (in MW)	414
Columbia Energy Center | WPL [Member]
Property, Plant and Equipment [Line Items]
Nameplate Capacity (in MW)	595
Lansing Generating Station | IPL [Member]
Property, Plant and Equipment [Line Items]
Nameplate Capacity (in MW)	275

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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.

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