Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues:
Total operating revenues	$ 5,401	$ 5,339	$ 13,921	$ 14,450
Other Income and (Expense):
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	959	718	2,096	1,680
Southern Company [Member]
Operating Revenues:
Retail revenues	4,701	4,558	11,958	12,186
Wholesale revenues	520	600	1,435	1,719
Other electric revenues	169	169	494	503
Other revenues	11	12	34	42
Total operating revenues	5,401	5,339	13,921	14,450
Operating Expenses:
Fuel	1,520	1,656	3,932	4,765
Purchased power	193	194	507	514
Other operations and maintenance	1,097	1,021	3,320	3,026
Depreciation and amortization	528	514	1,515	1,515
Taxes other than income taxes	264	258	761	751
Estimated loss on Kemper IGCC	150	418	182	798
Total operating expenses	3,752	4,061	10,217	11,369
Operating Income (Loss)	1,649	1,278	3,704	3,081
Other Income and (Expense):
Allowance for equity funds used during construction	60	63	163	182
Interest expense, net of amounts capitalized	(218)	(207)	(612)	(623)
Other income (expense), net	(21)	(7)	(41)	(20)
Total other income and (expense)	(179)	(151)	(490)	(461)
Earnings Before Income Taxes	1,470	1,127	3,214	2,620
Income taxes (benefit)	500	392	1,076	889
Net Income (Loss)	970	735	2,138	1,731
Dividends on preferred and preference stock of subsidiaries	11	17	42	51
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	$ 959	$ 718	$ 2,096	$ 1,680
Earnings per share (EPS) -
Basic EPS (in dollars per share)	$ 1.05	$ 0.80	$ 2.30	$ 1.88
Diluted EPS (in dollars per share)	$ 1.05	$ 0.80	$ 2.30	$ 1.87
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	910	898	910	894
Diluted (in shares)	912	902	913	898
Cash dividends paid per share of common stock (in dollars per share)	$ 0.5425	$ 0.525	$ 1.610	$ 1.5575
Alabama Power [Member]
Operating Revenues:
Retail revenues	$ 1,558	$ 1,512	$ 4,151	$ 4,058
Wholesale revenues, non-affiliates	65	72	188	222
Wholesale revenues, affiliates	20	31	55	168
Other revenues	52	54	157	166
Total operating revenues	1,695	1,669	4,551	4,614
Operating Expenses:
Fuel	408	442	1,061	1,288
Purchased power, non-affiliates	56	57	142	153
Purchased power, affiliates	51	54	153	140
Other operations and maintenance	371	334	1,140	989
Depreciation and amortization	163	174	481	521
Taxes other than income taxes	91	88	275	265
Total operating expenses	1,140	1,149	3,252	3,356
Operating Income (Loss)	555	520	1,299	1,258
Other Income and (Expense):
Allowance for equity funds used during construction	14	15	43	36
Interest expense, net of amounts capitalized	(71)	(63)	(205)	(188)
Other income (expense), net	(7)	3	(24)	(5)
Total other income and (expense)	(64)	(45)	(186)	(157)
Earnings Before Income Taxes	491	475	1,113	1,101
Income taxes (benefit)	192	183	427	429
Net Income (Loss)	299	292	686	672
Dividends on preferred and preference stock of subsidiaries	4	10	21	30
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	295	282	665	642
Georgia Power [Member]
Operating Revenues:
Retail revenues	2,537	2,452	6,223	6,502
Wholesale revenues, non-affiliates	55	80	173	269
Wholesale revenues, affiliates	5	7	18	38
Other revenues	94	92	271	277
Total operating revenues	2,691	2,631	6,685	7,086
Operating Expenses:
Fuel	706	684	1,735	2,055
Purchased power, non-affiliates	90	77	227	219
Purchased power, affiliates	148	172	411	522
Other operations and maintenance	462	456	1,405	1,334
Depreciation and amortization	214	211	633	628
Taxes other than income taxes	107	111	302	320
Total operating expenses	1,727	1,711	4,713	5,078
Operating Income (Loss)	964	920	1,972	2,008
Other Income and (Expense):
Allowance for equity funds used during construction			24	29
Interest expense, net of amounts capitalized	(90)	(88)	(272)	(262)
Other income (expense), net	18	14	34	29
Total other income and (expense)	(72)	(74)	(238)	(233)
Earnings Before Income Taxes	892	846	1,734	1,775
Income taxes (benefit)	337	317	657	660
Net Income (Loss)	555	529	1,077	1,115
Dividends on preferred and preference stock of subsidiaries	4	4	13	13
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	551	525	1,064	1,102
Gulf Power [Member]
Operating Revenues:
Retail revenues	363	366	983	979
Wholesale revenues, non-affiliates	30	34	82	104
Wholesale revenues, affiliates	17	21	52	97
Other revenues	19	17	53	49
Total operating revenues	429	438	1,170	1,229
Operating Expenses:
Fuel	143	164	375	478
Purchased power, non-affiliates	26	27	76	57
Purchased power, affiliates	4	4	22	19
Other operations and maintenance	90	85	274	251
Depreciation and amortization	40	38	100	109
Taxes other than income taxes	35	31	91	84
Total operating expenses	338	349	938	998
Operating Income (Loss)	91	89	232	231
Other Income and (Expense):
Allowance for equity funds used during construction	3	3	11	8
Interest expense, net of amounts capitalized	(12)	(13)	(38)	(39)
Other income (expense), net	(1)	(1)	(3)	(2)
Total other income and (expense)	(10)	(11)	(30)	(33)
Earnings Before Income Taxes	81	78	202	198
Income taxes (benefit)	31	29	75	74
Net Income (Loss)	50	49	127	124
Dividends on preferred and preference stock of subsidiaries	2	2	7	7
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	48	47	120	117
Mississippi Power [Member]
Operating Revenues:
Retail revenues	244	228	601	647
Wholesale revenues, non-affiliates	76	83	216	255
Wholesale revenues, affiliates	18	39	63	82
Other revenues	3	5	13	13
Total operating revenues	341	355	893	997
Operating Expenses:
Fuel	130	169	359	459
Purchased power, non-affiliates	1	3	5	16
Purchased power, affiliates	1	2	6	17
Other operations and maintenance	63	67	206	192
Depreciation and amortization	38	23	95	70
Taxes other than income taxes	24	22	71	63
Estimated loss on Kemper IGCC	150	418	182	798
Total operating expenses	407	704	924	1,615
Operating Income (Loss)	(66)	(349)	(31)	(618)
Other Income and (Expense):
Allowance for equity funds used during construction	29	32	82	108
Interest expense, net of amounts capitalized	(13)	(9)	6	(34)
Other income (expense), net	(2)	(8)	(5)	(12)
Total other income and (expense)	14	15	83	62
Earnings Before Income Taxes	(52)	(334)	52	(556)
Income taxes (benefit)	(31)	(139)	(11)	(253)
Net Income (Loss)	(21)	(195)	63	(303)
Dividends on preferred and preference stock of subsidiaries	0	0	1	2
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	(21)	(195)	62	(305)
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	295	332	776	870
Wholesale revenues, affiliates	104	103	303	243
Other revenues	2	0	7	2
Total operating revenues	401	435	1,086	1,115
Operating Expenses:
Fuel	118	178	361	421
Purchased power, non-affiliates	17	28	52	73
Purchased power, affiliates	5	13	18	58
Other operations and maintenance	62	46	184	168
Depreciation and amortization	64	60	183	163
Taxes other than income taxes	6	5	17	17
Total operating expenses	272	330	815	900
Operating Income (Loss)	129	105	271	215
Other Income and (Expense):
Interest expense, net of amounts capitalized	(18)	(23)	(62)	(67)
Other income (expense), net	1	5	1	6
Total other income and (expense)	(17)	(18)	(61)	(61)
Earnings Before Income Taxes	112	87	210	154
Income taxes (benefit)	1	22	14	22
Net Income (Loss)	111	65	196	132
Less: Net income attributable to noncontrolling interests	9	1	15	4
Net income attributable to Southern Power Company	$ 102	$ 64	$ 181	$ 128