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  Alabama Power, Georgia Power, and Mississippi Power  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 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, wholesale gas services, and gas marketing 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 $86 million for the three months ended March 31, 2020 and $87 million for the three months ended March 31, 2019 . Revenues from sales of natural gas from Southern Company Gas to the traditional electric operating companies were immaterial for the three months ended March 31, 2020 and 2019. Revenues from sales of natural gas from Southern Company Gas to Southern Power were $10 million for the three months ended March 31, 2020 and $17 million for the three months ended March 31, 2019 . 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 energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency, as well as investments in telecommunications and leveraged lease projects. All other inter-segment revenues are not material. Financial data for business segments and products and services for the three months ended March 31, 2020 and 2019 was as follows: Electric Utilities Traditional Electric Operating Companies Southern Power Eliminations Total Southern Company Gas All Other Eliminations Consolidated (in millions) Three Months Ended March 31, 2020 Operating revenues $ 3,407 $ 375 $ (87 ) $ 3,695 $ 1,249 $ 114 $ (40 ) $ 5,018 Segment net income (loss) (a)(b) 642 75  717 275 (121 ) (3 ) 868 At March 31, 2020 Goodwill $  $ 2 $  $ 2 $ 5,015 $ 263 $  $ 5,280 Total assets 81,765 13,646 (695 ) 94,716 21,617 3,467 (948 ) 118,852 Three Months Ended March 31, 2019 Operating revenues $ 3,445 $ 443 $ (93 ) $ 3,795 $ 1,474 $ 182 $ (39 ) $ 5,412 Segment net income (loss) (a)(c) 565 56  621 270 1,195 (2 ) 2,084 At December 31, 2019 Goodwill $  $ 2 $  $ 2 $ 5,015 $ 263 $  $ 5,280 Total assets 81,063 14,300 (713 ) 94,650 21,687 3,511 (1,148 ) 118,700 (a) Attributable to Southern Company. (b) Segment net income (loss) for Southern Power includes a $39 million pre-tax gain ( $23 million gain after tax) on the sale of Plant Mankato for the three months ended March 31, 2020 . See Note (K) under " Southern Power " for additional information. (c) Segment net income (loss) for the "All Other" column includes the preliminary pre-tax gain associated with the sale of Gulf Power of $2.5 billion ( $1.3 billion after tax) for the three months ended March 31, 2019. See Note 15 to the financial statements in Item 8 of the Form 10-K under " Southern Company" for additional information. Products and Services Electric Utilities' Revenues Retail Wholesale Other Total (in millions) Three Months Ended March 31, 2020 $ 3,078 $ 418 $ 199 $ 3,695 Three Months Ended March 31, 2019 3,084 499 212 3,795 Southern Company Gas' Revenues Gas Distribution Operations Wholesale Gas Services (*) Gas Marketing Services Other Total (in millions) Three Months Ended March 31, 2020 $ 1,013 $ 51 $ 177 $ 8 $ 1,249 Three Months Ended March 31, 2019 1,161 86 229 (2 ) 1,474 (*) The revenues for wholesale gas services are netted with costs associated with its energy and risk management activities. See "Southern Company Gas" herein for additional information. Southern Company Gas Southern Company Gas manages its business through four reportable segments  gas distribution operations, gas pipeline investments, wholesale gas services, and gas marketing services. The non-reportable segments are combined and presented as all other. 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, a 20% ownership interest in the PennEast Pipeline construction project, a 50% joint ownership interest in the Dalton Pipeline, and a 5% ownership interest in the Atlantic Coast Pipeline construction project through its sale on March 24, 2020. These natural gas pipelines enable the provision of diverse sources of natural gas supplies to the customers of Southern Company Gas. Wholesale gas services provides 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 engages 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 Energy Services, LLC. The all other column includes segments below the quantitative threshold for separate disclosure, including natural gas storage businesses, fuels operations through the sale of Southern Company Gas' interest in Pivotal LNG on March 24, 2020, the investment in Triton through its sale on May 29, 2019, and other subsidiaries that fall below the quantitative threshold for separate disclosure. See Notes (E) and (K) under " Southern Company Gas " for additional information. Business segment financial data for the three months ended March 31, 2020 and 2019 was as follows: Gas Distribution Operations Gas Pipeline Investments Wholesale Gas Services (*) Gas Marketing Services Total All Other Eliminations Consolidated (in millions) Three Months Ended March 31, 2020 Operating revenues $ 1,020 $ 8 $ 51 $ 177 $ 1,256 $ 8 $ (15 ) $ 1,249 Segment net income (loss) 164 30 23 57 274 1  275 Total assets at March 31, 2020 18,166 1,652 643 1,517 21,978 11,094 (11,455 ) 21,617 Three Months Ended March 31, 2019 Operating revenues $ 1,172 $ 8 $ 86 $ 229 $ 1,495 $ 11 $ (32 ) $ 1,474 Segment net income (loss) 133 32 47 61 273 (3 )  270 Total assets at December 31, 2019 18,204 1,678 850 1,496 22,228 10,759 (11,300 ) 21,687 (*) The revenues for wholesale gas services are 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 Revenues Intercompany Revenues Total Gross Revenues Less Gross Gas Costs Operating Revenues (in millions) Three Months Ended March 31, 2020 $ 1,185 $ 29 $ 1,214 $ 1,163 $ 51 Three Months Ended March 31, 2019 1,926 88 2,014 1,928 86