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Revenue from Contracts with Customers and Lease Income - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 5,532 | $ 6,226 | $ 11,777 | $ 12,486
Total operating revenues | 5,748 | 7,206 | 12,228 | 13,854
Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 3,859 | 4,789 | 7,458 | 8,402
Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 3,908 | 4,072 | 7,500 | 7,529
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,647 | 1,655 | 3,174 | 3,179
Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,370 | 1,387 | 2,619 | 2,567
Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 864 | 1,005 | 1,653 | 1,732
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 27 | 25 | 54 | 51
Natural Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 852 | 1,083 | 2,728 | 3,140
Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 753 | 963 | 2,340 | 2,746
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 330 | 474 | 1,226 | 1,490
Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 82 | 130 | 314 | 400
Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 284 | 276 | 603 | 613
Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 6 | 16 | 29 | 48
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 51 | 67 | 168 | 195
Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 605 | 937 | 1,203 | 1,601
Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 463 | 783 | 973 | 1,322
PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 253 | 585 | 534 | 930
PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 149 | 136 | 341 | 268
Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 61 | 62 | 98 | 124
Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 81 | 100 | 324 | 359
Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 73 | 90 | 304 | 333
Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 8 | 10 | 20 | 26
Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | 216 | 980 | 451 | 1,368
Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 327 | 308 | 640 | 530
ALABAMA POWER CO |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,702 | 1,644 | 3,404 | 3,188
Total operating revenues | 1,689 | 1,931 | 3,336 | 3,580
ALABAMA POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 1,467 | 1,629 | 2,848 | 3,008
ALABAMA POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 1,545 | 1,398 | 3,035 | 2,734
ALABAMA POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 648 | 617 | 1,308 | 1,250
ALABAMA POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 465 | 410 | 894 | 786
ALABAMA POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 429 | 368 | 827 | 691
ALABAMA POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 3 | 3 | 6 | 7
ALABAMA POWER CO | Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 114 | 183 | 266 | 345
ALABAMA POWER CO | PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 58 | 108 | 129 | 168
ALABAMA POWER CO | PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 44 | 40 | 105 | 78
ALABAMA POWER CO | Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 12 | 35 | 32 | 99
ALABAMA POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
ALABAMA POWER CO | Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | (13) | 287 | (68) | 392
ALABAMA POWER CO | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 43 | 63 | 103 | 109
GEORGIA POWER CO |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2,321 | 2,614 | 4,368 | 4,674
Total operating revenues | 2,391 | 3,121 | 4,567 | 5,328
GEORGIA POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 2,165 | 2,908 | 4,146 | 4,926
GEORGIA POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2,133 | 2,435 | 4,022 | 4,348
GEORGIA POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 928 | 962 | 1,730 | 1,783
GEORGIA POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 830 | 900 | 1,582 | 1,638
GEORGIA POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 353 | 553 | 666 | 887
GEORGIA POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 22 | 20 | 44 | 40
GEORGIA POWER CO | Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 47 | 64 | 78 | 130
GEORGIA POWER CO | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 43 | 58 | 70 | 110
GEORGIA POWER CO | PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 24 | 40 | 35 | 72
GEORGIA POWER CO | PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 13 | 12 | 25 | 23
GEORGIA POWER CO | Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 6 | 6 | 10 | 15
GEORGIA POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
GEORGIA POWER CO | Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | 70 | 507 | 199 | 654
GEORGIA POWER CO | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 145 | 121 | 276 | 216
MISSISSIPPI POWER CO |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 314 | 422 | 682 | 746
Total operating revenues | 311 | 434 | 702 | 769
MISSISSIPPI POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total operating revenues | 227 | 252 | 464 | 469
MISSISSIPPI POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 230 | 239 | 443 | 447
MISSISSIPPI POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 71 | 76 | 136 | 146
MISSISSIPPI POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 75 | 77 | 143 | 143
MISSISSIPPI POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 82 | 84 | 160 | 154
MISSISSIPPI POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2 | 2 | 4 | 4
MISSISSIPPI POWER CO | Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 74 | 174 | 217 | 282
MISSISSIPPI POWER CO | PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2 | 5 | 5 | 8
MISSISSIPPI POWER CO | PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 2 | 0 | 34 | 3
MISSISSIPPI POWER CO | Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 70 | 169 | 178 | 271
MISSISSIPPI POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
MISSISSIPPI POWER CO | Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | (3) | 12 | 20 | 23
MISSISSIPPI POWER CO | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 10 | 9 | 22 | 17
SOUTHERN POWER CO |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 365 | 731 | 769 | 1,146
Total operating revenues | 525 | 899 | 1,033 | 1,438
SOUTHERN POWER CO | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 349 | 722 | 742 | 1,129
SOUTHERN POWER CO | PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 175 | 441 | 376 | 694
SOUTHERN POWER CO | PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 91 | 85 | 179 | 166
SOUTHERN POWER CO | Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 83 | 196 | 187 | 269
SOUTHERN POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN POWER CO | Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | 160 | 168 | 264 | 292
SOUTHERN POWER CO | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 16 | 9 | 27 | 17
SOUTHERN Co GAS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 834 | 1,063 | 2,664 | 3,105
Total operating revenues | 852 | 1,083 | 2,728 | 3,140
SOUTHERN Co GAS | Retail electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Natural gas distribution revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 753 | 963 | 2,340 | 2,746
SOUTHERN Co GAS | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 330 | 474 | 1,226 | 1,490
SOUTHERN Co GAS | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 82 | 130 | 314 | 400
SOUTHERN Co GAS | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 284 | 276 | 603 | 613
SOUTHERN Co GAS | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 6 | 16 | 29 | 48
SOUTHERN Co GAS | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 51 | 67 | 168 | 195
SOUTHERN Co GAS | Wholesale electric revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | PPA energy revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | PPA capacity revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Non-PPA revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 0 | 0 | 0 | 0
SOUTHERN Co GAS | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 81 | 100 | 324 | 359
SOUTHERN Co GAS | Gas marketing services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 73 | 90 | 304 | 333
SOUTHERN Co GAS | Other natural gas revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | 8 | 10 | 20 | 26
SOUTHERN Co GAS | Other revenue sources |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other revenues | 18 | 20 | 64 | 35
SOUTHERN Co GAS | Other revenues |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers | $ 0 | $ 0 | $ 0 | $ 0

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