Condensed Consolidated Statements of Comprehensive Income (Unaudited) - Southern - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 1,089	$ 376	$ 2,079	$ 1,482
Qualifying hedges:
Changes in fair value, net of tax	(45)	14	(26)	(16)
Reclassification adjustment for amounts included in net income, net of tax	54	(5)	74	50
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	2	3	5	6
Total other comprehensive income	11	12	53	40
Comprehensive Income	1,100	388	2,132	1,522
Dividends on preferred stock of subsidiaries	4	4	7	7
Comprehensive loss attributable to noncontrolling interests	(22)	0	(67)	(33)
Comprehensive Income	$ 1,118	$ 384	$ 2,192	$ 1,548