Leases - Power Purchase Commitment (Details) $ in Millions	1 Months Ended	5 Months Ended
Jan. 31, 2023 USD ($)	May 31, 2022 MW
Whitewater \| Wisconsin Electric Power Company & Wisconsin Public Service \| Subsequent event
Leases
Total purchase price \| $	$ 72.7
Power purchase commitment
Leases
Power purchase contract period		25 years
Firm capacity from power purchase contract (in megawatts)		236.5
Minimum energy requirements over remaining term of power purchase contract (in megawatts)		0

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 50
-Section 30
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-URI https://asc.fasb.org/extlink&oid=126928898&loc=d3e9215-128498

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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-Section 55
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 50
-Section 25
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 50
-Section 30
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