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Schedule I - Short-Term Notes Receivable from Related Parties (Details) - WEC Energy Group - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | $ 71.0 | $ 64.1
UMERC |  |
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | 42.5 | 38.1
Wispark |  |
Notes to parent company financial statements |  |
Short-term notes receivable from related parties | $ 28.5 | $ 26.0

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