Consolidated Statements of Comprehensive Income - GAS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Income	$ 4,171	$ 4,260	$ 3,849
Qualifying hedges:
Changes in fair value, net of tax	26	(5)	(41)
Reclassification adjustment for amounts included in net income, net of tax	(33)	80	69
Pension and other postretirement benefit plans:
Benefit plan net gain (loss), net of tax	10	23	(39)
Reclassification adjustment for amounts included in net income, net of tax	0	1	1
Comprehensive Income	4,344	4,500	3,966
Southern Company Gas
Qualifying hedges:
Changes in fair value, net of tax	(3)	(9)	(45)
Reclassification adjustment for amounts included in net income, net of tax	3	30	46
Pension and other postretirement benefit plans:
Benefit plan net gain (loss), net of tax	4	11	(15)
Reclassification adjustment for amounts included in net income, net of tax	(1)	0	(1)
Total other comprehensive income (loss)	3	32	(15)
Comprehensive Income	$ 735	$ 772	$ 600