Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income (loss)	$ 1,222	$ 1,109	$ 2,031	$ 427
Qualifying hedges:
Changes in fair value, net of tax	(11)	25	(19)	54
Reclassification adjustment for amounts included in net income, net of tax	14	(17)	60	(59)
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	8	1	11	3
Total other comprehensive income (loss)	11	9	52	(2)
Comprehensive Income (Loss)	1,233	1,118	2,083	425
Less:
Dividends on preferred and preference stock of subsidiaries	4	10	12	32
Comprehensive income attributable to noncontrolling interests	54	30	71	48
Comprehensive Income (Loss) Attributable to Parent	1,175	1,078	2,000	345
ALABAMA POWER CO
Net income (loss)	377	330	868	743
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 (Loss)	378	331	871	746
Less:
Dividends on preferred and preference stock of subsidiaries	4	5	11	14
GEORGIA POWER CO
Net income (loss)	664	584	621	1,201
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	1	1	3	2
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	1	1	3	2
Comprehensive Income (Loss)	665	585	624	1,203
Less:
Dividends on preferred and preference stock of subsidiaries	0	4	0	13
GULF POWER CO
Net income (loss)	63	63	147	121
Qualifying hedges:
Changes in fair value, net of tax	0	0	0	(1)
Pension and other postretirement benefit plans:
Total other comprehensive income (loss)	0	0	0	(1)
Comprehensive Income (Loss)	63	63	147	120
Less:
Dividends on preferred and preference stock of subsidiaries	0	0	0	4
MISSISSIPPI POWER CO
Net income (loss)	47	40	87	(2,033)
Qualifying hedges:
Changes in fair value, net of tax	0	(1)	(1)	0
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	(1)	0	1
Comprehensive Income (Loss)	47	39	87	(2,032)
Less:
Dividends on preferred and preference stock of subsidiaries	0	0	1	1
SOUTHERN POWER CO
Net income (loss)	146	154	306	324
Qualifying hedges:
Changes in fair value, net of tax	(11)	25	(19)	58
Reclassification adjustment for amounts included in net income, net of tax	11	(20)	46	(68)
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	0	0	1	0
Total other comprehensive income (loss)	0	5	28	(10)
Comprehensive Income (Loss)	146	159	334	314
Less:
Comprehensive income attributable to noncontrolling interests	54	30	71	48
Comprehensive Income (Loss) Attributable to Parent	92	129	263	266
SOUTHERN Co GAS
Net income (loss)	46	15	294	303
Qualifying hedges:
Changes in fair value, net of tax	0	0	2	(3)
Reclassification adjustment for amounts included in net income, net of tax	0	0	2	0
Pension and other postretirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	6	0	5	0
Total other comprehensive income (loss)	6	0	9	(3)
Comprehensive Income (Loss)	$ 52	$ 15	$ 303	$ 300