Acquisitions and Dispositions - Schedule of Construction Projects (Details) - SOUTHERN POWER CO - MW	6 Months Ended
Jun. 30, 2026	Feb. 28, 2026
Millers Branch Solar Development Phase 1
Business Combination [Line Items]
PPA Contract Period	20 years
Nameplate capacity placed in service		200
Millers Branch Solar Development Phase 2
Business Combination [Line Items]
Approximate nameplate capacity	180
PPA Contract Period	15 years
Millers Branch Solar Development Phase 3
Business Combination [Line Items]
Approximate nameplate capacity	132
PPA Contract Period	15 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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+ Details