Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Revenues:
Retail electric revenues	$ 4,615	$ 4,808		$ 11,786	$ 11,932
Wholesale electric revenues	718	613		1,867	1,455
Other electric revenues	168	181		510	529
Natural gas revenues	532	518		2,746	518
Other revenues	168	144		494	281
Total operating revenues	6,201	6,264		17,403	14,715
Operating Expenses:
Fuel	1,285	1,400		3,372	3,334
Purchased power	256	227		646	581
Cost of natural gas	134	133		1,085	133
Cost of other sales	90	84		293	161
Other operations and maintenance	1,287	1,411		3,918	3,616
Depreciation and amortization	767	695		2,236	1,805
Taxes other than income taxes	303	309		941	821
Estimated loss on Kemper IGCC	34	88		3,155	222
Total operating expenses	4,156	4,347		15,646	10,673
Operating Income	2,045	1,917		1,757	4,042
Other Income and (Expense):
Allowance for equity funds used during construction	18	52		133	150
Earnings from equity method investments	32	29		100	28
Interest expense, net of amounts capitalized	(407)	(374)		(1,248)	(913)
Other income (expense), net	11	(8)		2	(66)
Total other income and (expense)	(346)	(301)		(1,013)	(801)
Earnings Before Income Taxes	1,699	1,616		744	3,241
Income taxes	590	439		317	917
Consolidated Net Income	1,109	1,177		427	2,324
Less:
Dividends on preferred and preference stock of subsidiaries	10	11		32	34
Net income attributable to noncontrolling interests	30	27		48	39
Net Income	$ 1,069	$ 1,139		$ 347	$ 2,251
Earnings per share —
Basic (in dollars per share)	$ 1.07	$ 1.18		$ 0.35	$ 2.40
Diluted (in dollars per share)	$ 1.06	$ 1.17		$ 0.35	$ 2.38
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	1,003	968		998	940
Diluted (in shares)	1,010	975		1,005	945
Cash dividends paid per share of common stock (in dollars per share)	$ 0.58	$ 0.56		$ 1.7200	$ 1.6625
ALABAMA POWER CO
Operating Revenues:
Retail electric revenues	$ 1,595	$ 1,629		$ 4,155	$ 4,139
Wholesale revenues, non-affiliates	77	82		210	211
Wholesale revenues, affiliates	18	18		83	49
Other revenues	50	56		158	162
Total operating revenues	1,740	1,785		4,606	4,561
Operating Expenses:
Fuel	343	410		944	973
Purchased power, non-affiliates	57	63		132	139
Purchased power, affiliates	55	41		117	129
Other operations and maintenance	391	348		1,134	1,097
Depreciation and amortization	185	177		549	524
Taxes other than income taxes	93	96		284	286
Total operating expenses	1,124	1,135		3,160	3,148
Operating Income	616	650		1,446	1,413
Other Income and (Expense):
Allowance for equity funds used during construction	11	7		27	23
Interest expense, net of amounts capitalized	(76)	(77)		(229)	(224)
Other income (expense), net	(5)	(5)		(8)	(16)
Total other income and (expense)	(70)	(75)		(210)	(217)
Earnings Before Income Taxes	546	575		1,236	1,196
Income taxes	216	219		493	462
Consolidated Net Income	330	356		743	734
Less:
Dividends on preferred and preference stock of subsidiaries	5	4		14	13
Net Income	325	352		729	721
GEORGIA POWER CO
Operating Revenues:
Retail electric revenues	2,402	2,540		5,995	6,164
Wholesale revenues, non-affiliates	45	49		124	131
Wholesale revenues, affiliates	6	9		23	24
Other revenues	93	100		284	302
Total operating revenues	2,546	2,698		6,426	6,621
Operating Expenses:
Fuel	482	575		1,297	1,390
Purchased power, non-affiliates	119	102		310	277
Purchased power, affiliates	161	142		470	392
Other operations and maintenance	413	496		1,194	1,393
Depreciation and amortization	225	215		669	639
Taxes other than income taxes	112	114		311	311
Total operating expenses	1,512	1,644		4,251	4,402
Operating Income	1,034	1,054		2,175	2,219
Other Income and (Expense):
Allowance for equity funds used during construction				29	36
Interest expense, net of amounts capitalized	(105)	(98)		(310)	(290)
Other income (expense), net	5	11		41	35
Total other income and (expense)	(100)	(87)		(269)	(255)
Earnings Before Income Taxes	934	967		1,906	1,964
Income taxes	350	363		705	734
Consolidated Net Income	584	604		1,201	1,230
Less:
Dividends on preferred and preference stock of subsidiaries	4	4		13	13
Net Income	580	600		1,188	1,217
GULF POWER CO
Operating Revenues:
Retail electric revenues	375	377		972	978
Wholesale revenues, non-affiliates	14	17		44	48
Wholesale revenues, affiliates	28	23		75	59
Other revenues	20	19		53	51
Total operating revenues	437	436		1,144	1,136
Operating Expenses:
Fuel	127	141		323	342
Purchased power, non-affiliates	37	33		104	95
Purchased power, affiliates	2	3		13	9
Other operations and maintenance	81	86		252	239
Depreciation and amortization	42	49		95	129
Taxes other than income taxes	33	34		88	93
Loss on Plant Scherer Unit 3	0	0		33	0
Total operating expenses	322	346		908	907
Operating Income	115	90		236	229
Other Income and (Expense):
Interest expense, net of amounts capitalized	(13)	(11)		(37)	(36)
Other income (expense), net	1	(2)		0	(4)
Total other income and (expense)	(12)	(13)		(37)	(40)
Earnings Before Income Taxes	103	77		199	189
Income taxes	40	30		78	74
Consolidated Net Income	63	47		121	115
Less:
Dividends on preferred and preference stock of subsidiaries	0	2		4	7
Net Income	63	45		117	108
MISSISSIPPI POWER CO
Operating Revenues:
Retail electric revenues	243	263		665	652
Wholesale revenues, non-affiliates	72	78		196	198
Wholesale revenues, affiliates	21	7		40	23
Other revenues	5	4		14	12
Total operating revenues	341	352		915	885
Operating Expenses:
Fuel	120	112		301	268
Purchased power, non-affiliates	4	3		7	4
Purchased power, affiliates	2	5		13	14
Other operations and maintenance	66	74		206	211
Depreciation and amortization	39	30		120	114
Taxes other than income taxes	25	31		77	81
Estimated loss on Kemper IGCC	34	88		3,155	222
Total operating expenses	290	343		3,879	914
Operating Income	51	9		(2,964)	(29)
Other Income and (Expense):
Allowance for equity funds used during construction	1	31		72	90
Interest expense, net of amounts capitalized	13	(15)		(23)	(46)
Other income (expense), net	(1)	(1)		(3)	(4)
Total other income and (expense)	13	15		46	40
Earnings Before Income Taxes	64	24		(2,918)	11
Income taxes	24	(2)		(885)	(29)
Consolidated Net Income	40	26		(2,033)	40
Less:
Dividends on preferred and preference stock of subsidiaries	0	0		1	1
Net Income	40	26		(2,034)	39
SOUTHERN POWER CO
Operating Revenues:
Wholesale revenues, non-affiliates	510	387		1,293	866
Wholesale revenues, affiliates	105	110		295	313
Other revenues	3	3		9	10
Total operating revenues	618	500		1,597	1,189
Operating Expenses:
Fuel	189	154		460	341
Purchased power, non-affiliates	36	25		90	60
Purchased power, affiliates	7	8		23	16
Other operations and maintenance	83	81		272	246
Depreciation and amortization	131	93		379	247
Taxes other than income taxes	13	5		37	17
Total operating expenses	459	366		1,261	927
Operating Income	159	134		336	262
Other Income and (Expense):
Interest expense, net of amounts capitalized	(47)	(35)		(144)	(78)
Other income (expense), net	3	2		3	3
Total other income and (expense)	(44)	(33)		(141)	(75)
Earnings Before Income Taxes	115	101		195	187
Income taxes	(39)	(102)		(129)	(167)
Consolidated Net Income	154	203		324	354
Less:
Net income attributable to noncontrolling interests	30	27		48	39
Net Income	124	176		276	$ 315
SOUTHERN Co GAS
Operating Revenues:
Natural gas revenues	532	518		2,746
Other revenues	33	25		95
Total operating revenues	565	543		2,841
Operating Expenses:
Cost of natural gas	134	133		1,085
Cost of other sales	7	2		20
Other operations and maintenance	205	216		671
Depreciation and amortization	125	116		370
Merger-related expenses	0	35		0
Taxes other than income taxes	26	29		140
Total operating expenses	497	531		2,286
Operating Income	68	12		555
Other Income and (Expense):
Earnings from equity method investments	32	29		100
Interest expense, net of amounts capitalized	(51)	(39)		(145)
Other income (expense), net	18	9		26
Total other income and (expense)	(1)	(1)		(19)
Earnings Before Income Taxes	67	11		536
Income taxes	52	7		233
Consolidated Net Income	15	4		303
Less:
Net income attributable to noncontrolling interests	0	0		0
Net Income	$ 15	$ 4		$ 303
Predecessor | SOUTHERN Co GAS
Operating Revenues:
Natural gas revenues			$ 1,841
Other revenues			64
Total operating revenues			1,905
Operating Expenses:
Cost of natural gas			755
Cost of other sales			14
Other operations and maintenance			454
Depreciation and amortization			206
Merger-related expenses			56
Taxes other than income taxes			99
Total operating expenses			1,584
Operating Income			321
Other Income and (Expense):
Earnings from equity method investments			2
Interest expense, net of amounts capitalized			(96)
Other income (expense), net			5
Total other income and (expense)			(89)
Earnings Before Income Taxes			232
Income taxes			87
Consolidated Net Income			145
Less:
Net income attributable to noncontrolling interests			14
Net Income			$ 131