NEW ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Millions	Aug. 15, 2023	Jul. 01, 2023
WEC Energy Group \| Floating Rate WEC Energy Group Junior Notes Due 2067
Debt Instrument [Line Items]
Unsecured debt	$ 500.0	$ 500.0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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