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Schedule I - Short-Term Notes Receivable from Related Parties (Details) - WEC Energy Group - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Notes to parent company financial statements |  |
Short-term notes receivable from related parties | $ 16.0 | $ 30.9
UMERC |  |
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | 15.2 | 27.1
Wispark |  |
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | 0.8 | 1.1
Bluewater |  |
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | $ 0.0 | $ 2.7

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