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INCOME TAXES - Current and Deferred Income Tax Provisions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Federal — |  |  |
Current | $ 50 | $ 199 | $ 156
Deferred | 36 | 70 | 1,237
Total federal taxes | 86 | 269 | 1,393
State — |  |  |
Current | (25) | 100 | 275
Deferred | 206 | 24 | 130
Total state taxes | 181 | 124 | 405
Income taxes | 267 | 393 | 1,798
Alabama Power |  |  |
Federal — |  |  |
Current | 104 | 198 | 61
Deferred | 172 | 44 | 125
Total federal taxes | 276 | 242 | 186
State — |  |  |
Current | 23 | 61 | 12
Deferred | 73 | 34 | 72
Total state taxes | 96 | 95 | 84
Income taxes | 372 | 337 | 270
Georgia Power |  |  |
Federal — |  |  |
Current | 311 | 365 | 264
Deferred | (449) | (224) | 180
Total federal taxes | (138) | 141 | 444
State — |  |  |
Current | 71 | 60 | 6
Deferred | (101) | (49) | 22
Total state taxes | (30) | 11 | 28
Income taxes | (168) | 152 | 472
Mississippi Power |  |  |
Federal — |  |  |
Current | 25 | 18 | (6)
Deferred | (15) | (14) | 26
Total federal taxes | 10 | 4 | 20
State — |  |  |
Current | 0 | 0 | (1)
Deferred | 11 | 10 | 11
Total state taxes | 11 | 10 | 10
Income taxes | 21 | 14 | 30
Southern Power |  |  |
Federal — |  |  |
Current | (340) | (303) | (717)
Deferred | 343 | 299 | 647
Total federal taxes | 3 | (4) | (70)
State — |  |  |
Current | (16) | (4) | 1
Deferred | 0 | 11 | 13
Total state taxes | (16) | 7 | 14
Income taxes | (13) | 3 | (56)
Southern Company Gas |  |  |
Federal — |  |  |
Current | 85 | 82 | (120)
Deferred | 35 | 53 | 195
Total federal taxes | 120 | 135 | 75
State — |  |  |
Current | (68) | 35 | 37
Deferred | 223 | 3 | 18
Total state taxes | 155 | 38 | 55
Income taxes | $ 275 | $ 173 | $ 130

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