| Balance Sheets | 2025-09-30 | 2025-06-30 | 2025-03-31 | 2024-09-30 |
|---|---|---|---|---|
| Cash and cash equivalents | 3,341 | 1,264 | 2,327 | 1,018 |
| Customer accounts | 2,304 | 2,301 | 2,463 | 2,327 |
| Unbilled revenues | 685 | 895 | 684 | 556 |
| Under recovered fuel clause revenues | 517 | 684 | 707 | 689 |
| Other accounts and notes | 476 | 553 | 501 | 909 |
| Accumulated provision for uncollectible accounts | 79 | 83 | 81 | 64 |
| Materials and supplies | 2,158 | 2,138 | 2,167 | 2,169 |
| Fossil fuel for generation | 682 | 740 | 738 | 799 |
| Natural gas for sale | 415 | 197 | 149 | 417 |
| Prepaid expenses | 324 | 482 | 441 | 391 |
| Assets from risk management activities, net of collateral | 56 | 70 | 134 | - |
| Regulatory assets asset retirement obligations | 353 | 389 | 371 | 390 |
| Other regulatory assets | 793 | 732 | 699 | 877 |
| Other current assets | 602 | 439 | 517 | 562 |
| Total current assets | 12,627 | 10,801 | 11,817 | 11,040 |
| In service | 143,189 | 140,888 | 138,749 | 134,889 |
| Less accumulated depreciation | 42,793 | 41,703 | 40,909 | 39,536 |
| Plant in service, net of depreciation | 100,396 | 99,185 | 97,840 | 95,353 |
| Other utility plant, net | 331 | 363 | 378 | 426 |
| Nuclear fuel, at amortized cost | 914 | 907 | 890 | 886 |
| Construction work in progress | 9,239 | 7,686 | 7,221 | 6,232 |
| Total property, plant, and equipment | 110,880 | 108,141 | 106,329 | 102,897 |
| Goodwill | 5,161 | 5,161 | 5,161 | 5,161 |
| Nuclear decommissioning trusts, at fair value | 2,884 | 2,762 | 2,611 | 2,650 |
| Equity investments in unconsolidated subsidiaries | 1,303 | 1,425 | 1,439 | 1,414 |
| Customer Relationships | - | 212 | - | 212 |
| Trade Names | - | 64 | - | 64 |
| PPAFair Value Adjustments | - | 390 | - | 390 |
| Other Intangible Assets | - | 3 | - | 3 |
| Finite Lived Intangible Assets Gross | - | 669 | - | 669 |
| Other intangible assets, net | 233 | - | 249 | - |
| Fcc licenses | 75 | 75 | 75 | 75 |
| Gross carrying amount | - | 744 | - | 744 |
| Accumulated amortization | - | 428 | - | 403 |
| Other intangible assets, net of amortization | 308 | 316 | 324 | 341 |
| Miscellaneous property and investments | 696 | 699 | 690 | 657 |
| Total other property and investments | 10,352 | 10,363 | 10,225 | 10,223 |
| Operating lease right-of-use assets, net of amortization | 1,378 | 1,405 | 1,426 | 1,415 |
| Deferred charges related to income taxes | 911 | 899 | 895 | 874 |
| Prepaid pension costs | 2,982 | 2,881 | 2,781 | 2,375 |
| Unamortized loss on reacquired debt | 191 | 195 | 199 | 208 |
| Deferred under recovered fuel clause revenues | 197 | 325 | 389 | 632 |
| Regulatory assets asset retirement obligations, deferred | 5,047 | 5,115 | 5,465 | 5,277 |
| Other regulatory assets, deferred | 7,361 | 7,338 | 7,187 | 7,531 |
| Other deferred charges and assets | 1,322 | 1,390 | 1,396 | 1,484 |
| Total deferred charges and other assets | 19,389 | 19,548 | 19,738 | 19,796 |
| Total assets | 153,248 | 148,853 | 148,109 | 143,956 |
| Securities due within one year | 7,541 | 5,365 | 5,168 | 1,642 |
| Notes payable | 144 | 988 | 514 | 722 |
| Accounts payable | 3,017 | 2,948 | 3,094 | 3,950 |
| Customer deposits | 489 | 468 | 458 | 491 |
| Accrued income taxes | 456 | 20 | 53 | 37 |
| Other accrued taxes | 966 | 800 | 600 | 985 |
| Accrued interest | 602 | 775 | 600 | 570 |
| Accrued compensation | 1,206 | 825 | 683 | 1,065 |
| Asset retirement obligations | 680 | 683 | 748 | 763 |
| Liabilities from risk management activities, net of collateral | 98 | 86 | 99 | 199 |
| Operating lease obligations | 198 | 200 | 200 | 197 |
| Natural gas cost over recovery | 163 | 107 | 16 | 226 |
| Other regulatory liabilities | 196 | 264 | 422 | 214 |
| Other current liabilities | 970 | 1,041 | 1,115 | 1,104 |
| Total current liabilities | 16,726 | 14,570 | 13,770 | 12,165 |
| Long-term debt | 64,621 | 62,983 | 62,939 | 61,254 |
| Accumulated deferred income taxes | 12,250 | 12,294 | 12,181 | 11,727 |
| Deferred credits related to income taxes | 4,381 | 4,446 | 4,372 | 4,587 |
| Accumulated deferred itcs | 1,994 | 2,017 | 2,034 | 2,003 |
| Employee benefit obligations | 955 | 993 | 983 | 1,064 |
| Operating lease obligations, deferred | 1,242 | 1,288 | 1,299 | 1,267 |
| Asset retirement obligations, deferred | 8,774 | 8,862 | 9,145 | 9,178 |
| Other cost of removal obligations | 2,032 | 2,028 | 2,039 | 2,006 |
| Other regulatory liabilities, deferred | 642 | 671 | 683 | 725 |
| Other deferred credits and liabilities | 1,357 | 1,359 | 1,441 | 1,075 |
| Total deferred credits and other liabilities | 33,627 | 33,958 | 34,177 | 33,632 |
| Total liabilities | 114,974 | 111,511 | 110,886 | 107,051 |
| Total stockholders' equity | 38,274 | 37,342 | 37,223 | 36,905 |
| Total liabilities and stockholders' equity | 153,248 | 148,853 | 148,109 | 143,956 |
SOUTHERN CO (SO)
SOUTHERN CO (SO)