Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income (loss)	$ 497	$ 525
Qualifying hedges:
Changes in fair value, net of tax	(117)	(18)
Reclassification adjustment for amounts included in net income, net of tax	2	1
Pension and other post retirement benefit plans:
Reclassification adjustment for amounts included in net income, net of tax	1	2
Total other comprehensive income (loss)	(114)	(15)
Dividends on preferred and preference stock of subsidiaries	11	17
Comprehensive income attributable to noncontrolling interests	1	0
Comprehensive Income (Loss)	371	493
Alabama Power [Member]
Net Income (loss)	159	179
Qualifying hedges:
Changes in fair value, net of tax	(2)	(4)
Reclassification adjustment for amounts included in net income, net of tax	1	0
Pension and other post retirement benefit plans:
Total other comprehensive income (loss)	(1)	(4)
Dividends on preferred and preference stock of subsidiaries	4	10
Comprehensive Income (Loss)	158	175
Georgia Power [Member]
Net Income (loss)	272	240
Qualifying hedges:
Changes in fair value, net of tax	0	(14)
Reclassification adjustment for amounts included in net income, net of tax	1	0
Pension and other post retirement benefit plans:
Total other comprehensive income (loss)	1	(14)
Dividends on preferred and preference stock of subsidiaries	4	4
Comprehensive Income (Loss)	273	226
Gulf Power [Member]
Net Income (loss)	31	39
Qualifying hedges:
Changes in fair value, net of tax	(3)	0
Pension and other post retirement benefit plans:
Total other comprehensive income (loss)	(3)	0
Dividends on preferred and preference stock of subsidiaries	2	2
Comprehensive Income (Loss)	28	39
Mississippi Power [Member]
Net Income (loss)	11	35
Pension and other post retirement benefit plans:
Total other comprehensive income (loss)	0	0
Dividends on preferred and preference stock of subsidiaries	0	0
Comprehensive Income (Loss)	11	35
Southern Power [Member]
Net Income (loss)	51	33
Qualifying hedges:
Reclassification adjustment for amounts included in net income, net of tax	1	0
Pension and other post retirement benefit plans:
Total other comprehensive income (loss)	1	0
Comprehensive income attributable to noncontrolling interests	1	0
Comprehensive Income (Loss)	$ 51	$ 33