Condensed Consolidated Statements of Comprehensive Income (Unaudited) - Southern - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Consolidated Net Income	$ 1,535	$ 1,432	$ 3,794	$ 3,053
Qualifying hedges:
Changes in fair value, net of tax	(2)	2	(5)	(34)
Reclassification adjustment for amounts included in net income, net of tax	(8)	36	39	70
Pension and other postretirement benefit plans:
Benefit plan net gain (loss), net of tax	0	0	3	0
Reclassification adjustment for amounts included in net income, net of tax	1	0	1	1
Total other comprehensive income (loss)	(9)	38	38	37
Comprehensive Income	1,526	1,470	3,832	3,090
Comprehensive income (loss) attributable to noncontrolling interests	0	10	(73)	(68)
Consolidated Comprehensive Income Attributable to Company	$ 1,526	$ 1,460	$ 3,905	$ 3,158