v3.26.1
Condensed Consolidated Statements of Comprehensive Income (Unaudited) - GAS - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Net income $ 1,174 $ 880 $ 2,531 $ 2,214
Qualifying hedges:        
Changes in fair value, net of tax (13) 35 (16) 49
Reclassification adjustment for amounts included in net income, net of tax 7 (31) 11 (43)
Pension and other postretirement benefit plans:        
Reclassification adjustment for amounts included in net income, net of tax 1 0 1 0
Consolidated Comprehensive Income Attributable to Company 1,169 884 2,528 2,221
SOUTHERN Co GAS        
Net income 126 106 573 524
Qualifying hedges:        
Changes in fair value, net of tax (3) (6) 2 6
Reclassification adjustment for amounts included in net income, net of tax 2 (1) (4) 0
Pension and other postretirement benefit plans:        
Reclassification adjustment for amounts included in net income, net of tax 0 0 (1) (1)
Total other comprehensive income (loss) (1) (7) (3) 5
Consolidated Comprehensive Income Attributable to Company $ 125 $ 99 $ 570 $ 529