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PROPERTY, PLANT, AND EQUIPMENT - Property, Plant and Equipment (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Electric utilities: |  |
Generation | $ 57,325 | $ 51,756
Transmission | 15,561 | 14,201
Distribution | 26,482 | 24,200
General/other | 6,305 | 5,806
Electric utilities' plant in service | 105,673 | 95,963
Southern Company Gas: |  |
Natural gas transportation and distribution | 17,798 | 16,810
Storage facilities | 1,565 | 1,553
Other | 1,477 | 1,360
Southern Company Gas plant in service | 20,840 | 19,723
Other plant in service | 1,915 | 1,843
Total plant in service | 128,428 | 117,529
Alabama Power |  |
Electric utilities: |  |
Generation | 16,584 | 15,920
Transmission | 6,152 | 5,658
Distribution | 9,775 | 9,154
General/other | 2,918 | 2,740
Electric utilities' plant in service | 35,429 | 33,472
Southern Company Gas: |  |
Natural gas transportation and distribution | 0 | 0
Storage facilities | 0 | 0
Other | 0 | 0
Southern Company Gas plant in service | 0 | 0
Other plant in service | 0 | 0
Total plant in service | 35,429 | 33,472
Georgia Power |  |
Electric utilities: |  |
Generation | 22,587 | 17,755
Transmission | 8,402 | 7,576
Distribution | 15,380 | 13,819
General/other | 3,001 | 2,729
Electric utilities' plant in service | 49,370 | 41,879
Southern Company Gas: |  |
Natural gas transportation and distribution | 0 | 0
Storage facilities | 0 | 0
Other | 0 | 0
Southern Company Gas plant in service | 0 | 0
Other plant in service | 0 | 0
Total plant in service | 49,370 | 41,879
Mississippi Power |  |
Electric utilities: |  |
Generation | 2,909 | 2,826
Transmission | 966 | 927
Distribution | 1,327 | 1,228
General/other | 321 | 273
Electric utilities' plant in service | 5,523 | 5,254
Southern Company Gas: |  |
Natural gas transportation and distribution | 0 | 0
Storage facilities | 0 | 0
Other | 0 | 0
Southern Company Gas plant in service | 0 | 0
Other plant in service | 0 | 0
Total plant in service | 5,523 | 5,254
Southern Power |  |
Electric utilities: |  |
Generation | 14,649 | 14,619
Transmission | 0 | 0
Distribution | 0 | 0
General/other | 41 | 39
Electric utilities' plant in service | 14,690 | 14,658
Southern Company Gas: |  |
Natural gas transportation and distribution | 0 | 0
Storage facilities | 0 | 0
Other | 0 | 0
Southern Company Gas plant in service | 0 | 0
Other plant in service | 0 | 0
Total plant in service | 14,690 | 14,658
Southern Company Gas |  |
Electric utilities: |  |
Generation | 0 | 0
Transmission | 0 | 0
Distribution | 0 | 0
General/other | 0 | 0
Electric utilities' plant in service | 0 | 0
Southern Company Gas: |  |
Natural gas transportation and distribution | 17,798 | 16,810
Storage facilities | 1,565 | 1,553
Other | 1,477 | 1,360
Southern Company Gas plant in service | 20,840 | 19,723
Other plant in service | 0 | 0
Total plant in service | $ 20,840 | $ 19,723

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