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v3.23.2

Segment and Related Information - Schedule of Financial Data for Products and Services (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Concentration Risk [Line Items] |  |  |  |
Operating revenues | $ 5,748 | $ 7,206 | $ 12,228 | $ 13,854
Electric Utilities |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 4,764 | 6,006 | 9,247 | 10,516
Southern Company Gas' Revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 852 | 1,083 | 2,728 | 3,140
Retail electric revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 3,859 | 4,789 | 7,458 | 8,402
Retail electric revenues | Electric Utilities |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 3,859 | 4,789 | 7,458 | 8,402
Wholesale electric revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 605 | 937 | 1,203 | 1,601
Wholesale electric revenues | Electric Utilities |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 605 | 937 | 1,203 | 1,601
Other Revenue | Electric Utilities |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 300 | 280 | 586 | 513
Other electric revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 209 | 192 | 399 | 370
Natural Gas |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 852 | 1,083 | 2,728 | 3,140
Gas Distribution Operations | Southern Company Gas' Revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 761 | 975 | 2,372 | 2,765
Gas marketing services | Southern Company Gas' Revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 75 | 92 | 320 | 335
Other | Southern Company Gas' Revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | 16 | 16 | 36 | 40
Other revenues |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Operating revenues | $ 223 | $ 205 | $ 440 | $ 341

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