LEASES -OPERATING LEASES (Details) - WECI - Hardin Solar III Energy Center $ in Millions	Jun. 30, 2025 USD ($)
Leases
Ownership interest of generating facility acquired	90.00%
Operating lease obligation	$ 29.4
Operating lease right of use asset	$ 28.9
Weighted average discount rate - operating lease	6.30%
Term 1
Leases
Initial term	25 years
Renewal term	25 years
Term 2
Leases
Initial term	35 years
Renewal term	10 years

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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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average discount rate for operating lease calculated at point in time.

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Represents the ownership interest of the generating facility acquired

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