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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Acquisitions and Dispositions - Schedule of Wind Repowering Projects (Details) - SOUTHERN POWER CO - MW	Jul. 29, 2026	Jun. 30, 2026
Kay Wind
Business Combination [Line Items]
Approximate nameplate capacity		200
Kay Wind \| Subsequent Event
Business Combination [Line Items]
Nameplate capacity placed in service	200
Kay Wind \| Maximum
Business Combination [Line Items]
Approximate nameplate capacity		299
Grant
Business Combination [Line Items]
Approximate nameplate capacity		152
Grant Plains
Business Combination [Line Items]
Approximate nameplate capacity		147
Wake
Business Combination [Line Items]
Approximate nameplate capacity		257
Bethel Wind Facility
Business Combination [Line Items]
Approximate nameplate capacity		276