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Condensed Statements of Income (Unaudited) - APC - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating Revenues:    
Total operating revenues $ 8,397 $ 7,775
Operating Expenses:    
Other operations and maintenance 1,653 1,619
Depreciation and amortization 1,420 1,286
Taxes other than income taxes 464 445
Total operating expenses 6,379 5,765
Operating Income 2,018 2,010
Other Income and (Expense):    
Allowance for equity funds used during construction 121 73
Interest expense, net of amounts capitalized (778) (714)
Other income (expense), net 155 149
Total other income and (expense) (452) (460)
Earnings Before Income Taxes 1,566 1,550
Income taxes (benefit) 228 280
Consolidated Net Income Attributable to Southern Company 1,356 1,334
Retail revenues    
Operating Revenues:    
Total operating revenues 4,640 4,601
Other revenues    
Operating Revenues:    
Total operating revenues 336 349
Operating Expenses:    
Total cost of sales 181 199
Fuel    
Operating Expenses:    
Total cost of sales 1,491 1,292
Purchased power, non-affiliates    
Operating Expenses:    
Total cost of sales 244 250
Alabama Power    
Operating Revenues:    
Total operating revenues 2,092 2,012
Operating Expenses:    
Other operations and maintenance 393 463
Depreciation and amortization 381 370
Taxes other than income taxes 133 131
Total operating expenses 1,481 1,474
Operating Income 611 538
Other Income and (Expense):    
Allowance for equity funds used during construction 19 18
Interest expense, net of amounts capitalized (115) (108)
Other income (expense), net 39 38
Total other income and (expense) (57) (52)
Earnings Before Income Taxes 554 486
Income taxes (benefit) 129 111
Consolidated Net Income Attributable to Southern Company 425 375
Alabama Power | Retail revenues    
Operating Revenues:    
Total operating revenues 1,728 1,723
Alabama Power | Wholesale revenues, non-affiliates    
Operating Revenues:    
Total operating revenues 117 91
Alabama Power | Wholesale revenues, affiliates    
Operating Revenues:    
Total operating revenues 119 69
Alabama Power | Other revenues    
Operating Revenues:    
Total operating revenues 128 129
Alabama Power | Fuel    
Operating Expenses:    
Total cost of sales 428 386
Alabama Power | Purchased power, non-affiliates    
Operating Expenses:    
Total cost of sales 73 69
Alabama Power | Purchased power, affiliates    
Operating Expenses:    
Total cost of sales $ 73 $ 55