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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - SPC - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Net income $ 1,338 $ 1,270
Qualifying hedges:    
Changes in fair value, net of tax (3) 14
Reclassification adjustment for amounts included in net income, net of tax 4 (12)
Total other comprehensive income 2 3
Comprehensive Income 1,340 1,273
Comprehensive loss attributable to noncontrolling interests (18) (64)
Consolidated Comprehensive Income Attributable to Company 1,358 1,337
SOUTHERN POWER CO    
Net income (14) 23
Qualifying hedges:    
Changes in fair value, net of tax (8) 16
Reclassification adjustment for amounts included in net income, net of tax 10 (14)
Total other comprehensive income 2 2
Comprehensive Income (12) 25
Comprehensive loss attributable to noncontrolling interests (18) (64)
Consolidated Comprehensive Income Attributable to Company $ 6 $ 89