Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 1,283	$ 1,345	$ 2,746	$ 4,335
Qualifying hedges:
Changes in fair value, net of tax	49	(92)	(26)	(152)
Reclassification adjustment for amounts included in net income, net of tax	(32)	50	(3)	74
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	3	1	6	2
Total other comprehensive income (loss)	20	(41)	(23)	(76)
Comprehensive Income	1,303	1,304	2,723	4,259
Dividends on preferred stock of subsidiaries	4	4	11	11
Comprehensive income attributable to noncontrolling interests	28	25	3	26
Comprehensive Income (Loss) Attributable to Parent	1,271	1,275	2,709	4,222
ALABAMA POWER CO
Net income	448	473	1,033	993
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	1	1	3	3
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	1	1	3	3
Comprehensive Income	449	474	1,036	996
Dividends on preferred stock of subsidiaries	4	4	11	11
GEORGIA POWER CO
Net income	773	839	1,411	1,598
Qualifying hedges:
Changes in fair value, net of tax	0	(35)	(2)	(62)
Reclassification adjustment for amounts included in net income, net of tax	2	0	4	1
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	2	(35)	2	(61)
Comprehensive Income	775	804	1,413	1,537
MISSISSIPPI POWER CO
Net income	67	65	138	139
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	0	0	1	1
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	0	0	1	1
Comprehensive Income	67	65	139	140
SOUTHERN POWER CO
Net income	102	111	215	342
Qualifying hedges:
Changes in fair value, net of tax	44	(53)	(6)	(84)
Reclassification adjustment for amounts included in net income, net of tax	(36)	45	(24)	64
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	0	0	2	0
Total other comprehensive income (loss)	8	(8)	(28)	(20)
Comprehensive Income	110	103	187	322
Comprehensive income attributable to noncontrolling interests	28	25	3	26
Comprehensive Income (Loss) Attributable to Parent	82	78	184	296
SOUTHERN Co GAS
Net income	14	(29)	360	347
Qualifying hedges:
Changes in fair value, net of tax	4	(3)	(17)	(6)
Reclassification adjustment for amounts included in net income, net of tax	1	0	7	0
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	0	0	0	(1)
Total other comprehensive income (loss)	5	(3)	(10)	(7)
Comprehensive Income	$ 19	$ (32)	$ 350	$ 340