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Schedule I - Short-Term Notes Payable to Related Parties (Details) - WEC Energy Group - Related Party - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Notes to parent company financial statements |  |
Notes payable to related parties | $ 580.9 | $ 459.6
Integrys |  |
Notes to parent company financial statements |  |
Notes payable to related parties | 327.0 | 257.0
WECC |  |
Notes to parent company financial statements |  |
Notes payable to related parties | 111.1 | 109.2
WBS |  |
Notes to parent company financial statements |  |
Notes payable to related parties | 90.4 | 91.8
Bluewater |  |
Notes to parent company financial statements |  |
Notes payable to related parties | $ 52.4 | $ 1.6

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