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Segment and Related Information
 6 Months Ended
Jun. 30, 2022
Segment Reporting [Abstract]  
Segment and Related Information SEGMENT AND RELATED INFORMATION
Southern Company
The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas. The traditional electric operating companies are vertically integrated utilities providing electric service in three Southeastern states. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy and battery energy storage projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through its natural gas distribution utilities and is involved in several other complementary businesses including gas pipeline investments and gas marketing services. Prior to the sale of Sequent on July 1, 2021, Southern Company Gas' other businesses also included wholesale gas services.
Southern Company's reportable business segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas. Revenues from sales by Southern Power to the traditional electric operating companies were $232 million and $337 million for the three and six months ended June 30, 2022, respectively, and $112 million and $193 million for the three and six months ended June 30, 2021, respectively. Revenues from sales of natural gas from Southern Company Gas to the traditional electric operating companies were immaterial for all periods presented. Revenues from sales of natural gas from Southern Company Gas (prior to its sale of Sequent) to Southern Power were $6 million and $18 million for the three and six months ended June 30, 2021, respectively. The "All Other" column includes the Southern Company parent entity, which does not allocate operating expenses to business segments. Also, this category includes segments below the quantitative threshold for separate disclosure. These segments include providing distributed energy and resilience solutions and deploying microgrids for commercial, industrial, governmental, and utility customers, as well as investments in telecommunications and, for the three and six months ended June 30, 2021, leveraged lease projects. All other inter-segment revenues are not material.
Financial data for business segments and products and services for the three and six months ended June 30, 2022 and 2021 was as follows:
Electric Utilities
Traditional
Electric Operating
Companies		Southern
Power		EliminationsTotalSouthern Company GasAll
Other		EliminationsConsolidated
(in millions)
Three Months Ended June 30, 2022
Operating revenues$5,563 $899 $(456)$6,006 $1,083 $159 $(42)$7,206 
Segment net income (loss)(a)(b)
1,036 98 — 1,134 115 (137)(5)1,107 
Six Months Ended June 30, 2022
Operating revenues$9,778 $1,438 $(700)$10,516 $3,140 $283 $(85)$13,854 
Segment net income (loss)(a)(b)
1,811 170 — 1,981 433 (263)(12)2,139 
At June 30, 2022
Goodwill$— $2 $— $2 $5,015 $263 $— $5,280 
Total assets92,742 13,402 (787)105,357 23,618 2,457 (663)130,769 
Three Months Ended June 30, 2021
Operating revenues$4,031 $490 $(114)$4,407 $677 $154 $(40)$5,198 
Segment net income (loss)(a)(b)(c)
511 36 — 547 (65)(108)(2)372 
Six Months Ended June 30, 2021
Operating revenues$7,795 $930 $(201)$8,524 $2,371 $288 $(75)$11,108 
Segment net income (loss)(a)(b)(c)(d)
1,267 133 — 1,400 333 (216)(9)1,508 
At December 31, 2021
Goodwill$— $2 $— $2 $5,015 $263 $— $5,280 
Total assets89,051 13,390 (667)101,774 23,560 2,975 (775)127,534 
(a)Attributable to Southern Company.
(b)For the traditional electric operating companies, includes pre-tax charges at Georgia Power for estimated losses associated with the construction of Plant Vogtle Units 3 and 4 of $52 million ($39 million after tax) for the three and six months ended June 30, 2022 and $460 million ($343 million after tax) and $508 million ($379 million after tax) for the three and six months ended June 30, 2021, respectively. See Note (B) and Note 2 to the financial statements in Item 8 of the Form 10-K under "Georgia Power – Nuclear Construction" for additional information.
(c)For Southern Company Gas, includes a pre-tax impairment charge of $82 million ($58 million after tax) related to its equity method investment in the PennEast Pipeline project. See Note 7 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information.
(d)For Southern Power, includes gains on wind turbine equipment contributed to various equity method investments totaling approximately $37 million pre-tax ($28 million after tax). See Note 15 to the financial statements under "Southern Power – Development Projects" in Item 8 of the Form 10-K for additional information.
Products and Services
 Electric Utilities' Revenues
RetailWholesaleOtherTotal
(in millions)
Three Months Ended June 30, 2022$4,789 $937 $280 $6,006 
Three Months Ended June 30, 20213,599 546 262 4,407 
Six Months Ended June 30, 2022$8,402 $1,601 $513 $10,516 
Six Months Ended June 30, 20216,941 1,091 492 8,524 
 Southern Company Gas' Revenues
Gas
Distribution
Operations
Wholesale
Gas
Services(*)
Gas
Marketing
Services		OtherTotal
(in millions)
Three Months Ended June 30, 2022$975 $— $92 $16 $1,083 
Three Months Ended June 30, 2021706 (110)64 17 677 
Six Months Ended June 30, 2022$2,765 $— $335 $40 $3,140 
Six Months Ended June 30, 20211,898 188 259 26 2,371 
(*)Prior to the sale of Sequent, the revenues for wholesale gas services were netted with costs associated with its energy and risk management activities. See "Southern Company Gas" herein and Note 15 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information.
Southern Company Gas
Southern Company Gas manages its business through three reportable segments – gas distribution operations, gas pipeline investments, and gas marketing services. Prior to the sale of Sequent on July 1, 2021, Southern Company Gas' reportable segments also included wholesale gas services. The non-reportable segments are combined and presented as all other. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information on the sale of Sequent.
Gas distribution operations is the largest component of Southern Company Gas' business and includes natural gas local distribution utilities that construct, manage, and maintain intrastate natural gas pipelines and gas distribution facilities in four states.
Gas pipeline investments consists of joint ventures in natural gas pipeline investments including a 50% interest in SNG and a 50% joint ownership interest in the Dalton Pipeline. These natural gas pipelines enable the provision of diverse sources of natural gas supplies to the customers of Southern Company Gas. Gas pipeline investments also includes a 20% ownership interest in the PennEast Pipeline project, which was cancelled in September 2021. See Note 7 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information.
Through July 1, 2021, wholesale gas services provided natural gas asset management and/or related logistics services for each of Southern Company Gas' utilities except Nicor Gas as well as for non-affiliated companies. Additionally, wholesale gas services engaged in natural gas storage and gas pipeline arbitrage and related activities.
Gas marketing services provides natural gas marketing to end-use customers primarily in Georgia and Illinois through SouthStar.
The all other column includes segments and subsidiaries that fall below the quantitative threshold for separate disclosure, including storage and fuels operations.
Business segment financial data for the three and six months ended June 30, 2022 and 2021 was as follows:
Gas Distribution OperationsGas Pipeline Investments
Wholesale Gas Services(a)
Gas Marketing ServicesTotalAll OtherEliminationsConsolidated
(in millions)
Three Months Ended June 30, 2022
Operating revenues$980 $8 $— $92 $1,080 $10 $(7)$1,083 
Segment net income (loss)92 23 — 1 116 (1)— 115 
Six Months Ended June 30, 2022
Operating revenues$2,782 $16 $— $335 $3,133 $26 $(19)$3,140 
Segment net income (loss)
306 52 — 67 425 8 — 433 
Total assets at June 30, 2022
21,183 1,433 — 1,554 24,170 11,999 (12,551)23,618 
Three Months Ended June 30, 2021
Operating revenues$710 $8 $(110)$64 $672 $11 $(6)$677 
Segment net income (loss)(b)
80 (36)(112)6 (62)(3)— (65)
Six Months Ended June 30, 2021
Operating revenues$1,910 $16 $188 $259 $2,373 $18 $(20)$2,371 
Segment net income (loss)(b)
263 (7)14 62 332 1 — 333 
Total assets at December 31, 2021
20,917 1,467 31 1,556 23,971 12,114 (12,525)23,560 
(a)As a result of the sale of Sequent, wholesale gas services is no longer a reportable segment for the three and six months ended June 30, 2022. Prior to the sale of Sequent, the revenues for wholesale gas services were netted with costs associated with its energy and risk management activities. A reconciliation of operating revenues and intercompany revenues is shown in the following table.
Third Party Gross RevenuesIntercompany RevenuesTotal Gross Revenues Less Gross Gas CostsOperating Revenues
(in millions)
Three Months Ended June 30, 2021$1,292 $27 $1,319 $1,429 $(110)
Six Months Ended June 30, 20213,881 90 3,971 3,783 188 
(b)For gas pipeline investments, includes a pre-tax impairment charge of $82 million ($58 million after tax) related to the equity method investment in the PennEast Pipeline project. See Note 7 to the financial statements under "Southern Company Gas" in Item 8 of the Form 10-K for additional information.