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Schedule I - Short-Term Notes Receivable from Related Parties (Details) - WEC Energy Group - Related Party - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Notes to parent company financial statements |  |
Notes receivable from related parties | $ 63.2 | $ 16.0
UMERC |  |
Notes to parent company financial statements |  |
Notes receivable from related parties | 63.2 | 15.2
Wispark |  |
Notes to parent company financial statements |  |
Notes receivable from related parties | $ 0.0 | $ 0.8

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