Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Revenues:
Retail revenues	$ 3,377	$ 3,542
Wholesale revenues	396	467
Other electric revenues	181	163
Other revenues	11	11
Total operating revenues	3,965	4,183
Operating Expenses:
Fuel	911	1,212
Purchased power	165	144
Other operations and maintenance	1,106	1,122
Depreciation and amortization	541	487
Taxes other than income taxes	256	252
Estimated loss on Kemper IGCC	53	9
Total operating expenses	3,032	3,226
Operating Income (Loss)	933	957
Other Income and (Expense):
Allowance for equity funds used during construction	53	63
Interest expense, net of amounts capitalized	(246)	(213)
Other income (expense), net	(21)	(8)
Total other income and (expense)	(214)	(158)
Earnings Before Income Taxes	719	799
Income taxes (benefit)	222	274
Net Income (Loss)	497	525
Less: Net income attributable to noncontrolling interests	1	0
Dividends on preferred and preference stock of subsidiaries	11	17
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	$ 485	$ 508
Earnings per share (EPS) -
Basic EPS (in dollars per share)	$ 0.53	$ 0.56
Diluted EPS (in dollars per share)	$ 0.53	$ 0.56
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	916	910
Diluted (in shares)	922	915
Cash dividends paid per share of common stock (in dollars per share)	$ 0.5425	$ 0.525
Alabama Power [Member]
Operating Revenues:
Retail revenues	$ 1,193	$ 1,268
Wholesale revenues, non-affiliates	63	65
Wholesale revenues, affiliates	22	15
Other revenues	53	53
Total operating revenues	1,331	1,401
Operating Expenses:
Fuel	268	310
Purchased power, non-affiliates	36	41
Purchased power, affiliates	33	53
Other operations and maintenance	392	399
Depreciation and amortization	172	158
Taxes other than income taxes	97	94
Total operating expenses	998	1,055
Operating Income (Loss)	333	346
Other Income and (Expense):
Allowance for equity funds used during construction	10	15
Interest expense, net of amounts capitalized	(73)	(65)
Other income (expense), net	(8)	(4)
Total other income and (expense)	(71)	(54)
Earnings Before Income Taxes	262	292
Income taxes (benefit)	103	113
Net Income (Loss)	159	179
Dividends on preferred and preference stock of subsidiaries	4	10
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	155	169
Georgia Power [Member]
Operating Revenues:
Retail revenues	1,717	1,814
Wholesale revenues, non-affiliates	41	68
Wholesale revenues, affiliates	5	8
Other revenues	109	88
Total operating revenues	1,872	1,978
Operating Expenses:
Fuel	376	526
Purchased power, non-affiliates	83	60
Purchased power, affiliates	139	149
Other operations and maintenance	457	474
Depreciation and amortization	211	216
Taxes other than income taxes	97	99
Total operating expenses	1,363	1,524
Operating Income (Loss)	509	454
Other Income and (Expense):
Allowance for equity funds used during construction	14	15
Interest expense, net of amounts capitalized	(94)	(89)
Other income (expense), net	17	15
Total other income and (expense)	(77)	(74)
Earnings Before Income Taxes	432	380
Income taxes (benefit)	160	140
Net Income (Loss)	272	240
Dividends on preferred and preference stock of subsidiaries	4	4
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	268	236
Gulf Power [Member]
Operating Revenues:
Retail revenues	283	293
Wholesale revenues, non-affiliates	16	25
Wholesale revenues, affiliates	21	22
Other revenues	15	17
Total operating revenues	335	357
Operating Expenses:
Fuel	94	110
Purchased power, non-affiliates	30	25
Purchased power, affiliates	2	9
Other operations and maintenance	77	93
Depreciation and amortization	38	20
Taxes other than income taxes	29	28
Total operating expenses	270	285
Operating Income (Loss)	65	72
Other Income and (Expense):
Allowance for equity funds used during construction	0	4
Interest expense, net of amounts capitalized	(13)	(13)
Other income (expense), net	(1)	(1)
Total other income and (expense)	(14)	(10)
Earnings Before Income Taxes	51	62
Income taxes (benefit)	20	23
Net Income (Loss)	31	39
Dividends on preferred and preference stock of subsidiaries	2	2
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	29	37
Mississippi Power [Member]
Operating Revenues:
Retail revenues	183	167
Wholesale revenues, non-affiliates	60	77
Wholesale revenues, affiliates	9	27
Other revenues	5	5
Total operating revenues	257	276
Operating Expenses:
Fuel	76	114
Purchased power, non-affiliates	0	2
Purchased power, affiliates	5	2
Other operations and maintenance	69	73
Depreciation and amortization	38	27
Taxes other than income taxes	26	25
Estimated loss on Kemper IGCC	53	9
Total operating expenses	267	252
Operating Income (Loss)	(10)	24
Other Income and (Expense):
Allowance for equity funds used during construction	29	28
Interest expense, net of amounts capitalized	(16)	(11)
Other income (expense), net	(2)	(2)
Total other income and (expense)	11	15
Earnings Before Income Taxes	1	39
Income taxes (benefit)	(10)	4
Net Income (Loss)	11	35
Dividends on preferred and preference stock of subsidiaries	0	0
Net Income (Loss) After Dividends on Preferred and Preference Stock of Subsidiaries	11	35
Southern Power [Member]
Operating Revenues:
Wholesale revenues, non-affiliates	215	232
Wholesale revenues, affiliates	97	114
Other revenues	3	2
Total operating revenues	315	348
Operating Expenses:
Fuel	91	138
Purchased power, non-affiliates	13	16
Purchased power, affiliates	6	10
Other operations and maintenance	79	52
Depreciation and amortization	73	59
Taxes other than income taxes	6	6
Total operating expenses	268	281
Operating Income (Loss)	47	67
Other Income and (Expense):
Interest expense, net of amounts capitalized	(21)	(22)
Other income (expense), net	2	0
Total other income and (expense)	(19)	(22)
Earnings Before Income Taxes	28	45
Income taxes (benefit)	(23)	12
Net Income (Loss)	51	33
Less: Net income attributable to noncontrolling interests	1	0
Net income attributable to Southern Power Company	$ 50	$ 33