XML 148 R123.htm IDEA: XBRL DOCUMENT v3.25.2
Segment and Related Information - Schedule of Gas Revenues (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]              
Total operating revenues $ 6,973   $ 6,463   $ 14,748 $ 13,109  
Other segment items 3,617   3,125   7,812 6,656  
Depreciation and amortization 1,323   1,182   2,608 2,327  
Earnings from equity method investments 10   31   43 77  
Interest expense(c) 874   694   1,588 1,358  
Income taxes (benefit) 289   290   569 513  
Consolidated Net Income Attributable to Southern Company 880   1,203   2,214 2,332  
Total assets 148,853       148,853   $ 145,180
SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 979   831   2,818 2,538  
Other segment items 599   478   1,670 1,443  
Depreciation and amortization 172   158   341 313  
Earnings from equity method investments 23   32   62 76  
Interest expense(c) 92   83   183 167  
Income taxes (benefit) 33   36   162 174  
Consolidated Net Income Attributable to Southern Company 106 $ 418 108 $ 409 524 517  
Total assets 26,376       26,376   26,177
Operating Segments              
Segment Reporting Information [Line Items]              
Total operating revenues 6,783   6,287   14,378 12,809  
Other segment items 3,447   2,975   7,492 6,369  
Depreciation and amortization 1,306   1,165   2,575 2,291  
Earnings from equity method investments 27   32   64 78  
Interest expense(c) 452   436   885 861  
Income taxes (benefit) 401   357   755 655  
Consolidated Net Income Attributable to Southern Company 1,204   1,386   2,735 2,711  
Total assets 146,856       146,856   143,382
Operating Segments | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 976   827   2,815 2,533  
Other segment items 595   474   1,668 1,443  
Depreciation and amortization 171   157   340 312  
Earnings from equity method investments 23   32   62 76  
Interest expense(c) 92   87   183 174  
Income taxes (benefit) 27   30   165 172  
Consolidated Net Income Attributable to Southern Company 114   111   521 508  
Total assets 28,138       28,138   27,336
Operating Segments | Gas distribution operations | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 885   749   2,454 2,212  
Other segment items 526   420   1,431 1,246  
Depreciation and amortization 167   152   330 303  
Earnings from equity method investments 0   0   0 0  
Interest expense(c) 82   76   164 154  
Income taxes (benefit) 19   21   123 127  
Consolidated Net Income Attributable to Southern Company 91   80   406 382  
Total assets 24,864       24,864   24,067
Operating Segments | Gas Pipeline Investments | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 8   8   16 16  
Other segment items 1   2   3 4  
Depreciation and amortization 1   1   3 2  
Earnings from equity method investments 23   32   62 76  
Interest expense(c) 9   9   18 18  
Income taxes (benefit) 5   6   13 16  
Consolidated Net Income Attributable to Southern Company 15   22   41 52  
Total assets 1,595       1,595   1,573
Operating Segments | Gas marketing services | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 83   70   345 305  
Other segment items 68   52   234 193  
Depreciation and amortization 3   4   7 7  
Earnings from equity method investments 0   0   0 0  
Interest expense(c) 1   2   1 2  
Income taxes (benefit) 3   3   29 29  
Consolidated Net Income Attributable to Southern Company 8   9   74 74  
Total assets 1,679       1,679   1,696
Operating Segments | All Other | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Consolidated Net Income Attributable to Southern Company     (3)        
All Other              
Segment Reporting Information [Line Items]              
Total operating revenues 225   222   454 383  
Other segment items 193   193   401 347  
Depreciation and amortization 17   17   33 36  
Earnings from equity method investments (17)   (1)   (21) (2)  
Interest expense(c) 422   259   703 508  
Income taxes (benefit) (112)   (67)   (186) (142)  
Consolidated Net Income Attributable to Southern Company (312)   (181)   (518) (368)  
Total assets 2,417       2,417   2,371
All Other | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues 5   7   9 13  
Other segment items 6   7   8 8  
Depreciation and amortization 1   1   1 1  
Earnings from equity method investments 0   0   0 0  
Interest expense(c) 0   (4)   0 (7)  
Income taxes (benefit) 6   6   (3) 2  
Consolidated Net Income Attributable to Southern Company (8)       3 9  
Total assets 10,492       10,492   10,047
Eliminations              
Segment Reporting Information [Line Items]              
Total operating revenues (35)   (46)   (84) (83)  
Other segment items (23)   (43)   (81) (60)  
Depreciation and amortization 0   0   0 0  
Earnings from equity method investments 0   0   0 1  
Interest expense(c) 0   (1)   0 (11)  
Income taxes (benefit) 0   0   0 0  
Consolidated Net Income Attributable to Southern Company (12)   (2)   (3) (11)  
Total assets (420)       (420)   (573)
Eliminations | SOUTHERN Co GAS              
Segment Reporting Information [Line Items]              
Total operating revenues (2)   (3)   (6) (8)  
Other segment items (2)   (3)   (6) (8)  
Depreciation and amortization 0   0   0 0  
Earnings from equity method investments 0   0   0 0  
Interest expense(c) 0   0   0 0  
Income taxes (benefit) 0   0   0 0  
Consolidated Net Income Attributable to Southern Company 0   $ 0   0 $ 0  
Total assets $ (12,254)       $ (12,254)   $ (11,206)