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ACQUISITIONS AND DISPOSITIONS | 12 Months Ended
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Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract] |
ACQUISITIONS AND DISPOSITIONS | ACQUISITIONS AND DISPOSITIONS None of the dispositions discussed herein, both individually and combined, represented a strategic shift in operations for the applicable Registrants that has, or is expected to have, a major effect on its operations and financial results; therefore, none of the assets related to the sales have been classified as discontinued operations for any of the periods presented. Southern Power Southern Power's acquisition-related costs for the projects discussed under "Asset Acquisitions" and "Construction Projects" were not material for any of the years presented. There were no asset acquisitions during 2022. Asset Acquisitions
Project Facility | Resource | Seller | Approximate Nameplate Capacity (MW) | Location | Southern Power Ownership Percentage | Expected/Actual COD | PPA Contract Period
Asset Acquisitions During 2023 |  |  |
Millers Branch(a) | Solar | EDF Renewables Development, Inc. | 200 | Haskell County, TX | 100% | Fourth quarter 2025 | 20 years
South Cheyenne | Solar | Hanwha Q Cells USA Corp. | 150 | Laramie County, WY | 100% | Second quarter 2024 | 20 years
Asset Acquisitions During 2021 |  |  |
Deuel Harvest(b) | Wind | Invenergy Renewables LLC | 300 | Deuel County, SD | 100% of Class B | February 2021 | 25 years and 15 years
(a)The project includes an option to expand capacity up to an additional 300 MWs. Subsequent to December 31, 2023, Southern Power committed to expand the construction of the facility through a second phase adding up to 205 MWs, with commercial operation expected to occur in the second quarter 2026. (b)In March 2021, Southern Power acquired a controlling interest in the project from Invenergy Renewables LLC and completed a tax equity transaction whereby it sold the Class A membership interests in the project. Southern Power consolidates the project's operating results in its financial statements and the tax equity partner and Invenergy Renewables LLC each own a noncontrolling interest. The aggregate purchase price for the two projects acquired during 2023 was $193 million, which is primarily recorded within construction work in progress on the balance sheet at December 31, 2023. Construction Projects
Project Facility | Resource | Approximate Nameplate Capacity (MW) | Location | COD | PPA Contract Period
Projects Completed During 2022
Garland Solar Storage(a) | Battery energy storage | 88 | Kern County, CA | September 2021 through February 2022(b) | 20 years
Tranquillity Solar Storage(a) | Battery energy storage | 72 | Fresno County, CA | November 2021 through March 2022(c) | 20 years
Projects Completed During 2021
Glass Sands(d) | Wind | 118 | Murray County, OK | November 2021 | 12 years
(a)In 2020, Southern Power restructured its ownership of the project, while retaining the controlling interests, by contributing the Class A membership interests to an existing partnership and selling 100% of the Class B membership interests. During 2021, Southern Power further restructured its ownership in the battery energy storage projects and completed tax equity transactions whereby it sold the Class A membership interests in the projects. Southern Power consolidates each project's operating results in its financial statements and the tax equity partner and two other partners each own a noncontrolling interest. See Note 9 under "Lessor" for additional information. (b)The facility has a total capacity of 88 MWs, of which 73 MWs were placed in service in 2021 and 15 MWs were placed in service in 2022. (c)The facility has a total capacity of 72 MWs, of which 32 MWs were placed in service in 2021 and 40 MWs were placed in service in 2022. (d)In December 2020, Southern Power purchased 100% of the membership interests of the Glass Sands facility. Development Projects Southern Power purchased wind turbine equipment in 2016 and 2017 for deployment to development and construction projects. All of this equipment has either been deployed to projects that have been completed or has been sold to third parties. Gains on wind turbine equipment contributed to various equity method investments totaled approximately $37 million in 2021. Southern Company Gas Sale of Sequent In July 2021, Southern Company Gas affiliates completed the sale of Sequent to Williams Field Services Group for a total cash purchase price of $159 million, including final working capital adjustments. The pre-tax gain associated with th e transaction was approximately $121 million ($92 million after tax). The sale resulted in $85 million of additional tax expense. Sale of Natural Gas Storage Facilities In September 2022, certain affiliates of Southern Company Gas entered into agreements to sell two natural gas storage facilities located in California and Texas for an aggregate purchase price of $186 million, plus working capital and certain other adjustments. The sale of the Texas facility was completed in November 2022 and the sale of the California facility was completed on September 22, 2023. Both sales resulted in an immaterial loss. Completion of the sale of the Texas facility was subject to release of a Southern Company Gas parent guarantee, which was executed in October 2022 and, as a result, Southern Company Gas recorded pre-tax impairment charges totaling approximately $131 million ($99 million after tax) in the fourth quarter 2022.
ACQUISITIONS AND DISPOSITIONS | ACQUISITIONS AND DISPOSITIONS None of the dispositions discussed herein, both individually and combined, represented a strategic shift in operations for the applicable Registrants that has, or is expected to have, a major effect on its operations and financial results; therefore, none of the assets related to the sales have been classified as discontinued operations for any of the periods presented. Southern Company In October 2021, Southern Company completed the sale of a leveraged lease investment to the lessee for $45 million. No gain or loss was recognized on the sale; however, it did result in the recognition of approximately $16 million of additional tax benefits. Prior to the sale, in the second quarter 2021, a charge of $7 million ($6 million after tax) was recorded to reduce the investment to its estimated fair value, less costs to sell. In December 2021, Southern Company completed the termination of its leasehold interest in assets associated with its two international leveraged lease projects and received cash proceeds of approximately $673 million after the accelerated exercise of the lessee's purchase options. The pre-tax gain associated with the transaction was approximately $93 million ($99 million gain after tax). Alabama Power In September 2022, Alabama Power completed its acquisition of the Calhoun Generating Station, which was accounted for as an asset acquisition. The total purchase price was $179 million, of which $171 million was related to net assets recorded within property, plant, and equipment on the balance sheet and reflected in property additions within the investing section of the statement of cash flows. The remainder primarily related to fossil fuel stock and materials and supplies. See Note 2 under "Alabama Power – Rate CNP New Plant" for additional information. Southern Power Southern Power's acquisition-related costs for the projects discussed under "Asset Acquisitions" and "Construction Projects" were not material for any of the years presented. There were no asset acquisitions during 2022. Asset Acquisitions
Project Facility | Resource | Seller | Approximate Nameplate Capacity (MW) | Location | Southern Power Ownership Percentage | Expected/Actual COD | PPA Contract Period
Asset Acquisitions During 2023 |  |  |
Millers Branch(a) | Solar | EDF Renewables Development, Inc. | 200 | Haskell County, TX | 100% | Fourth quarter 2025 | 20 years
South Cheyenne | Solar | Hanwha Q Cells USA Corp. | 150 | Laramie County, WY | 100% | Second quarter 2024 | 20 years
Asset Acquisitions During 2021 |  |  |
Deuel Harvest(b) | Wind | Invenergy Renewables LLC | 300 | Deuel County, SD | 100% of Class B | February 2021 | 25 years and 15 years
(a)The project includes an option to expand capacity up to an additional 300 MWs. Subsequent to December 31, 2023, Southern Power committed to expand the construction of the facility through a second phase adding up to 205 MWs, with commercial operation expected to occur in the second quarter 2026. (b)In March 2021, Southern Power acquired a controlling interest in the project from Invenergy Renewables LLC and completed a tax equity transaction whereby it sold the Class A membership interests in the project. Southern Power consolidates the project's operating results in its financial statements and the tax equity partner and Invenergy Renewables LLC each own a noncontrolling interest. The aggregate purchase price for the two projects acquired during 2023 was $193 million, which is primarily recorded within construction work in progress on the balance sheet at December 31, 2023. Construction Projects
Project Facility | Resource | Approximate Nameplate Capacity (MW) | Location | COD | PPA Contract Period
Projects Completed During 2022
Garland Solar Storage(a) | Battery energy storage | 88 | Kern County, CA | September 2021 through February 2022(b) | 20 years
Tranquillity Solar Storage(a) | Battery energy storage | 72 | Fresno County, CA | November 2021 through March 2022(c) | 20 years
Projects Completed During 2021
Glass Sands(d) | Wind | 118 | Murray County, OK | November 2021 | 12 years
(a)In 2020, Southern Power restructured its ownership of the project, while retaining the controlling interests, by contributing the Class A membership interests to an existing partnership and selling 100% of the Class B membership interests. During 2021, Southern Power further restructured its ownership in the battery energy storage projects and completed tax equity transactions whereby it sold the Class A membership interests in the projects. Southern Power consolidates each project's operating results in its financial statements and the tax equity partner and two other partners each own a noncontrolling interest. See Note 9 under "Lessor" for additional information. (b)The facility has a total capacity of 88 MWs, of which 73 MWs were placed in service in 2021 and 15 MWs were placed in service in 2022. (c)The facility has a total capacity of 72 MWs, of which 32 MWs were placed in service in 2021 and 40 MWs were placed in service in 2022. (d)In December 2020, Southern Power purchased 100% of the membership interests of the Glass Sands facility. Development Projects Southern Power purchased wind turbine equipment in 2016 and 2017 for deployment to development and construction projects. All of this equipment has either been deployed to projects that have been completed or has been sold to third parties. Gains on wind turbine equipment contributed to various equity method investments totaled approximately $37 million in 2021. Southern Company Gas Sale of Sequent In July 2021, Southern Company Gas affiliates completed the sale of Sequent to Williams Field Services Group for a total cash purchase price of $159 million, including final working capital adjustments. The pre-tax gain associated with th e transaction was approximately $121 million ($92 million after tax). The sale resulted in $85 million of additional tax expense. Sale of Natural Gas Storage Facilities In September 2022, certain affiliates of Southern Company Gas entered into agreements to sell two natural gas storage facilities located in California and Texas for an aggregate purchase price of $186 million, plus working capital and certain other adjustments. The sale of the Texas facility was completed in November 2022 and the sale of the California facility was completed on September 22, 2023. Both sales resulted in an immaterial loss. Completion of the sale of the Texas facility was subject to release of a Southern Company Gas parent guarantee, which was executed in October 2022 and, as a result, Southern Company Gas recorded pre-tax impairment charges totaling approximately $131 million ($99 million after tax) in the fourth quarter 2022.

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- Definition The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 805 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//805/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 205 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//205-20/tableOfContent + Details
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