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Condensed Statements of Income (Unaudited) - APC - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Operating Revenues:        
Total operating revenues $ 7,823 $ 7,274 $ 22,572 $ 20,383
Operating Expenses:        
Other operations and maintenance 1,643 1,662 4,948 4,522
Depreciation and amortization 1,422 1,210 4,030 3,537
Taxes other than income taxes 288 375 1,136 1,155
Total operating expenses 5,229 4,906 16,204 14,373
Operating Income 2,594 2,368 6,368 6,010
Other Income and (Expense):        
Allowance for equity funds used during construction 90 58 243 167
Interest expense, net of amounts capitalized (755) (692) (2,343) (2,050)
Other income (expense), net 149 147 459 450
Total other income and (expense) (483) (456) (1,565) (1,326)
Earnings Before Income Taxes 2,111 1,912 4,803 4,684
Income taxes 404 377 973 890
Consolidated Net Income Attributable to Southern Company 1,711 1,535 3,925 3,867
Retail revenues        
Operating Revenues:        
Total operating revenues 5,707 5,366 15,065 13,793
Other revenues        
Operating Revenues:        
Total operating revenues 288 283 974 820
Operating Expenses:        
Total cost of sales 156 166 522 464
Fuel        
Operating Expenses:        
Total cost of sales 1,345 1,146 3,753 3,174
Purchased power, non-affiliates        
Operating Expenses:        
Total cost of sales 259 249 769 669
Alabama Power        
Operating Revenues:        
Total operating revenues 2,318 2,138 6,298 5,803
Operating Expenses:        
Other operations and maintenance 434 493 1,370 1,335
Depreciation and amortization 380 366 1,121 1,091
Taxes other than income taxes 115 108 365 347
Total operating expenses 1,498 1,448 4,393 4,105
Operating Income 820 690 1,905 1,698
Other Income and (Expense):        
Allowance for equity funds used during construction 18 15 54 40
Interest expense, net of amounts capitalized (119) (113) (343) (337)
Other income (expense), net 44 36 128 116
Total other income and (expense) (57) (62) (161) (181)
Earnings Before Income Taxes 763 628 1,744 1,517
Income taxes 175 135 401 322
Consolidated Net Income Attributable to Southern Company 588 493 1,343 1,195
Alabama Power | Retail revenues        
Operating Revenues:        
Total operating revenues 2,046 1,904 5,487 5,117
Alabama Power | Wholesale revenues, non-affiliates        
Operating Revenues:        
Total operating revenues 137 89 326 259
Alabama Power | Wholesale revenues, affiliates        
Operating Revenues:        
Total operating revenues 28 34 132 103
Alabama Power | Other revenues        
Operating Revenues:        
Total operating revenues 107 111 353 324
Alabama Power | Fuel        
Operating Expenses:        
Total cost of sales 416 384 1,139 1,050
Alabama Power | Purchased power, non-affiliates        
Operating Expenses:        
Total cost of sales 56 49 180 148
Alabama Power | Purchased power, affiliates        
Operating Expenses:        
Total cost of sales $ 97 $ 48 $ 218 $ 134