ACQUISITIONS AND DISPOSITIONS - Schedule of Construction Projects (Details) - Southern Power - MW	1 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021
Garland Solar Storage
Business Acquisition [Line Items]
Approximate Nameplate Capacity (MW)		88	88
PPA Contract Period		20 years
Nameplate capacity placed in service (in MWs)		15	73
Tranquility Solar Storage
Business Acquisition [Line Items]
Approximate Nameplate Capacity (MW)		72	72
PPA Contract Period		20 years
Nameplate capacity placed in service (in MWs)			32
Glass Sands
Business Acquisition [Line Items]
Approximate Nameplate Capacity (MW)			118
PPA Contract Period			12 years
Tranquillity Solar Storage
Business Acquisition [Line Items]
Nameplate capacity placed in service (in MWs)		40
Tranquility Solar Storage | Class B Membership Interest | Tranquility Solar Storage
Business Acquisition [Line Items]
Noncontrolling ownership percentage sold by parent	100.00%
Garland Solar Storage | Class B Membership Interest | Garland Solar Storage
Business Acquisition [Line Items]
Noncontrolling ownership percentage sold by parent	100.00%
Glass Sands | Glass Sands
Business Acquisition [Line Items]
Noncontrolling ownership percentage held by parent	100.00%