Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues:
Retail revenues	$ 4,808	$ 4,701	$ 11,932	$ 11,958
Wholesale revenues	613	520	1,455	1,435
Other electric revenues	181	169	529	494
Natural gas revenues	518	0	518	0
Other revenues	144	11	281	34
Total operating revenues	6,264	5,401	14,715	13,921
Operating Expenses:
Fuel	1,400	1,520	3,334	3,932
Purchased power	227	193	581	507
Cost of natural gas	133	0	133	0
Cost of sales	84	0	161	0
Other operations and maintenance	1,411	1,097	3,616	3,320
Depreciation and amortization	695	528	1,805	1,515
Taxes other than income taxes	309	264	821	761
Estimated loss on Kemper IGCC	88	150	222	182
Total operating expenses	4,347	3,752	10,673	10,217
Operating Income (Loss)	1,917	1,649	4,042	3,704
Other Income and (Expense):
Allowance for equity funds used during construction	52	60	150	163
Interest expense, net of amounts capitalized	(374)	(218)	(913)	(612)
Other income (expense), net	21	(21)	(38)	(41)
Total other income and (expense)	(301)	(179)	(801)	(490)
Earnings (Loss) Before Income Taxes	1,616	1,470	3,241	3,214
Income taxes (benefit)	448	500	942	1,076
Net Income (Loss)	1,168	970	2,299	2,138
Dividends on preferred and preference stock of subsidiaries	11	11	34	42
Less: Net income attributable to noncontrolling interests	27	0	39	0
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	$ 1,130	$ 959	$ 2,226	$ 2,096
Earnings per share (EPS) -
Basic EPS (in dollars per share)	$ 1.17	$ 1.05	$ 2.37	$ 2.30
Diluted EPS (in dollars per share)	$ 1.16	$ 1.05	$ 2.36	$ 2.30
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	968	910	940	910
Diluted (in shares)	975	912	945	913
Cash dividends paid per share of common stock (in dollars per share)	$ 0.56	$ 0.5425	$ 1.6625	$ 1.61
Alabama Power [Member]
Operating Revenues:
Retail revenues	$ 1,629	$ 1,558	$ 4,139	$ 4,151
Wholesale revenues, non-affiliates	82	65	211	188
Wholesale revenues, affiliates	18	20	49	55
Other revenues	56	52	162	157
Total operating revenues	1,785	1,695	4,561	4,551
Operating Expenses:
Fuel	410	408	973	1,061
Purchased power, non-affiliates	63	56	139	142
Purchased power, affiliates	41	51	129	153
Other operations and maintenance	348	371	1,097	1,140
Depreciation and amortization	177	163	524	481
Taxes other than income taxes	96	91	286	275
Total operating expenses	1,135	1,140	3,148	3,252
Operating Income (Loss)	650	555	1,413	1,299
Other Income and (Expense):
Allowance for equity funds used during construction	7	14	23	43
Interest expense, net of amounts capitalized	(77)	(71)	(224)	(205)
Other income (expense), net	(5)	(7)	(16)	(24)
Total other income and (expense)	(75)	(64)	(217)	(186)
Earnings (Loss) Before Income Taxes	575	491	1,196	1,113
Income taxes (benefit)	221	192	466	427
Net Income (Loss)	354	299	730	686
Dividends on preferred and preference stock of subsidiaries	4	4	13	21
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	350	295	717	665
Georgia Power [Member]
Operating Revenues:
Retail revenues	2,540	2,537	6,164	6,223
Wholesale revenues, non-affiliates	49	55	131	173
Wholesale revenues, affiliates	9	5	24	18
Other revenues	100	94	302	271
Total operating revenues	2,698	2,691	6,621	6,685
Operating Expenses:
Fuel	575	706	1,390	1,735
Purchased power, non-affiliates	102	90	277	227
Purchased power, affiliates	142	148	392	411
Other operations and maintenance	496	462	1,393	1,405
Depreciation and amortization	215	214	639	633
Taxes other than income taxes	114	107	311	302
Total operating expenses	1,644	1,727	4,402	4,713
Operating Income (Loss)	1,054	964	2,219	1,972
Other Income and (Expense):
Allowance for equity funds used during construction			36	24
Interest expense, net of amounts capitalized	(98)	(90)	(290)	(272)
Other income (expense), net	11	18	35	34
Total other income and (expense)	(87)	(72)	(255)	(238)
Earnings (Loss) Before Income Taxes	967	892	1,964	1,734
Income taxes (benefit)	365	337	737	657
Net Income (Loss)	602	555	1,227	1,077
Dividends on preferred and preference stock of subsidiaries	4	4	13	13
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	598	551	1,214	1,064
Gulf Power [Member]
Operating Revenues:
Retail revenues	377	363	978	983
Wholesale revenues, non-affiliates	17	30	48	82
Wholesale revenues, affiliates	23	17	59	52
Other revenues	19	19	51	53
Total operating revenues	436	429	1,136	1,170
Operating Expenses:
Fuel	141	143	342	375
Purchased power, non-affiliates	33	26	95	76
Purchased power, affiliates	3	4	9	22
Other operations and maintenance	86	90	239	274
Depreciation and amortization	49	40	129	100
Taxes other than income taxes	34	35	93	91
Total operating expenses	346	338	907	938
Operating Income (Loss)	90	91	229	232
Other Income and (Expense):
Interest expense, net of amounts capitalized	(11)	(12)	(36)	(38)
Other income (expense), net	(2)	2	(4)	8
Total other income and (expense)	(13)	(10)	(40)	(30)
Earnings (Loss) Before Income Taxes	77	81	189	202
Income taxes (benefit)	30	31	74	75
Net Income (Loss)	47	50	115	127
Dividends on preferred and preference stock of subsidiaries	2	2	7	7
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	45	48	108	120
Mississippi Power [Member]
Operating Revenues:
Retail revenues	263	244	652	601
Wholesale revenues, non-affiliates	78	76	198	216
Wholesale revenues, affiliates	7	18	23	63
Other revenues	4	3	12	13
Total operating revenues	352	341	885	893
Operating Expenses:
Fuel	112	130	268	359
Purchased power, non-affiliates	3	1	4	5
Purchased power, affiliates	5	1	14	6
Other operations and maintenance	74	63	211	206
Depreciation and amortization	30	38	114	95
Taxes other than income taxes	31	24	81	71
Estimated loss on Kemper IGCC	88	150	222	182
Total operating expenses	343	407	914	924
Operating Income (Loss)	9	(66)	(29)	(31)
Other Income and (Expense):
Allowance for equity funds used during construction	31	29	90	82
Interest expense, net of amounts capitalized	(15)	(13)	(46)	6
Other income (expense), net	(1)	(2)	(4)	(5)
Total other income and (expense)	15	14	40	83
Earnings (Loss) Before Income Taxes	24	(52)	11	52
Income taxes (benefit)	(2)	(31)	(29)	(11)
Net Income (Loss)	26	(21)	40	63
Dividends on preferred and preference stock of subsidiaries	0	0	1	1
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	26	(21)	39	62
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	387	295	866	776
Wholesale revenues, affiliates	110	104	313	303
Other revenues	3	2	10	7
Total operating revenues	500	401	1,189	1,086
Operating Expenses:
Fuel	154	118	341	361
Purchased power, non-affiliates	25	17	60	52
Purchased power, affiliates	8	5	16	18
Other operations and maintenance	81	62	246	184
Depreciation and amortization	93	64	247	183
Taxes other than income taxes	5	6	17	17
Total operating expenses	366	272	927	815
Operating Income (Loss)	134	129	262	271
Other Income and (Expense):
Interest expense, net of amounts capitalized	(35)	(18)	(78)	(62)
Other income (expense), net	2	1	3	1
Total other income and (expense)	(33)	(17)	(75)	(61)
Earnings (Loss) Before Income Taxes	101	112	187	210
Income taxes (benefit)	(102)	1	(167)	14
Net Income (Loss)	203	111	354	196
Less: Net income attributable to noncontrolling interests	27	9	39	15
Net income attributable to Southern Power Company	$ 176	$ 102	$ 315	$ 181