Acquisitions and Dispositions (Tables)

3 Months Ended

Mar. 31, 2021

Business Combinations [Abstract]

Schedule of Assets Held for Sale

The following table provides Southern Company's major classes of assets classified as held for sale at March 31, 2021 and December 31, 2020:

	Southern Company
	At March 31,		At December 31,
	2021		2020
	(in millions)
Assets Held for Sale:
Total property, plant, and equipment	$	7	$	8
Leveraged leases	52		52
Total Assets Held for Sale	$	59	$	60

Schedule of Asset Acquisitions

During the three months ended March 31, 2021, Southern Power acquired a controlling membership interest in the wind facility listed below. Acquisition-related costs were expensed as incurred and were not material.

Project Facility	Resource	Seller	Approximate Nameplate Capacity (MW)	Location	Southern Power Ownership Percentage	COD	PPA Contract Period
Deuel Harvest(*)	Wind	Invenergy Renewables, LLC	300	Deuel County, SD	100% of Class B	February 2021	25 years and 15 years

(*)On March 26, 2021, Southern Power acquired a controlling interest in the facility and consolidates the project's operating results in its financial statements. On March 30, 2021, Southern Power completed a tax equity transaction whereby it received $220 million. The tax equity partner, which is the Class A member, and Invenergy Renewables, LLC each own a noncontrolling interest.

Schedule of Construction Projects

Project Facility	Resource	Approximate Nameplate Capacity (MW)	Location	Actual/Expected COD	PPA Contract Period
Projects Under Construction at March 31, 2021
Garland Solar Storage(a)	Battery energy storage system	88	Kern County, CA	Third quarter 2021	20 years
Tranquillity Solar Storage(a)	Battery energy storage system	72	Fresno County, CA	Fourth quarter 2021	20 years
Glass Sands(b)	Wind	118	Murray County, OK	Fourth quarter 2021	12 years

(a)In December 2020, Southern Power restructured its ownership of the project by contributing the Class A membership interests to an existing partnership and selling 100% of the Class B membership interests while retaining the controlling interest. Prior to commercial operation, Southern Power may restructure the project ownership again and enter into additional partnerships, but expects to retain the controlling interest. The ultimate outcome of this matter cannot be determined at this time.

(b)In December 2020, Southern Power purchased 100% of the membership interests of the Glass Sands facility.