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Commitments and Contingencies (Details) $ in Millions	Jan. 03, 2023 USD ($) landEasement	Jun. 30, 2023 USD ($)
Ashtabula III Wind Farm
Other Commitments [Line Items]
Purchase price	$ 50.6
Otter Tail Power Company | Federal Energy Regulatory Commission
Other Commitments [Line Items]
Estimated liability of refund obligation		$ 2.7
Otter Tail Power Company | Ashtabula III Wind Farm
Other Commitments [Line Items]
Purchase price	$ 50.6
Otter Tail Power Company | Ashtabula III Wind Farm | Land Easement Payments
Other Commitments [Line Items]
Number of land easements | landEasement	51
Remaining payments under easements		$ 4.1

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Number Of Land Easements

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

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Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

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