Consolidated Statements of Comprehensive Income - GAS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Income	$ 4,260	$ 3,849	$ 3,428
Qualifying hedges:
Changes in fair value, net of tax	(5)	(41)	(60)
Reclassification adjustment for amounts included in net income, net of tax	80	69	73
Pension and other postretirement benefit plans:
Benefit plan net gain (loss), net of tax	23	(39)	48
Reclassification adjustment for amounts included in net income, net of tax	1	1	10
Total other comprehensive income (loss)	99	(10)	71
Comprehensive Income	4,500	3,966	3,595
Southern Company Gas
Net Income	740	615	572
Qualifying hedges:
Changes in fair value, net of tax	(9)	(45)	13
Reclassification adjustment for amounts included in net income, net of tax	30	46	(24)
Pension and other postretirement benefit plans:
Benefit plan net gain (loss), net of tax	11	(15)	18
Reclassification adjustment for amounts included in net income, net of tax	0	(1)	0
Total other comprehensive income (loss)	32	(15)	7
Comprehensive Income	$ 772	$ 600	$ 579