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INCOME TAXES - Current and Deferred Income Tax Provisions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Federal — |  |  |
Current | $ 54 | $ 10 | $ 50
Deferred | 299 | 455 | 36
Total federal taxes | 353 | 465 | 86
State — |  |  |
Current | 41 | 27 | (25)
Deferred | 102 | 303 | 206
Total state taxes | 143 | 330 | 181
Income taxes | 496 | 795 | 267
Alabama Power |  |  |
Federal — |  |  |
Current | 242 | 54 | 104
Deferred | (257) | 259 | 172
Total federal taxes | (15) | 313 | 276
State — |  |  |
Current | 82 | 14 | 23
Deferred | 14 | 96 | 73
Total state taxes | 96 | 110 | 96
Income taxes | 81 | 423 | 372
Georgia Power |  |  |
Federal — |  |  |
Current | 205 | 38 | 311
Deferred | 195 | 152 | (449)
Total federal taxes | 400 | 190 | (138)
State — |  |  |
Current | 37 | (21) | 71
Deferred | 11 | 201 | (101)
Total state taxes | 48 | 180 | (30)
Income taxes | 448 | 370 | (168)
Mississippi Power |  |  |
Federal — |  |  |
Current | 49 | 42 | 25
Deferred | (26) | (16) | (15)
Total federal taxes | 23 | 26 | 10
State — |  |  |
Current | 1 | 0 | 0
Deferred | 12 | 11 | 11
Total state taxes | 13 | 11 | 11
Income taxes | 36 | 37 | 21
Southern Power |  |  |
Federal — |  |  |
Current | (320) | (43) | (340)
Deferred | 334 | 56 | 343
Total federal taxes | 14 | 13 | 3
State — |  |  |
Current | (1) | 2 | (16)
Deferred | (1) | 5 | 0
Total state taxes | (2) | 7 | (16)
Income taxes | 12 | 20 | (13)
Southern Company Gas |  |  |
Federal — |  |  |
Current | 62 | 122 | 85
Deferred | 68 | (3) | 35
Total federal taxes | 130 | 119 | 120
State — |  |  |
Current | 24 | 42 | (68)
Deferred | 57 | 19 | 223
Total state taxes | 81 | 61 | 155
Income taxes | $ 211 | $ 180 | $ 275

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