Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Revenues:
Retail electric revenues	$ 3,740	$ 3,777	$ 7,308	$ 7,171
Wholesale electric revenues	611	618	1,230	1,149
Other electric revenues	175	167	339	342
Natural gas revenues (includes alternative revenue programs of $(4), $-, $(27), and $9, respectively)	706	684	2,314	2,214
Alternative revenue programs	(4)	0	(27)	9
Other revenues	395	184	808	326
Total operating revenues	5,627	5,430	11,999	11,202
Operating Expenses:
Fuel	1,103	1,092	2,204	2,088
Purchased power	236	211	503	390
Cost of natural gas	228	232	949	951
Cost of other sales	279	114	568	203
Other operations and maintenance	1,559	1,356	3,008	2,740
Depreciation and amortization	783	754	1,552	1,469
Taxes other than income taxes	316	308	671	638
Estimated loss on plants under construction	1,060	3,012	1,105	3,120
Asset impairment			161	0
Goodwill impairment			42
Total operating expenses	5,564	7,079	10,560	11,599
Operating Income (Loss)	63	(1,649)	1,439	(397)
Other Income and (Expense):
Allowance for equity funds used during construction	32	58	63	115
Earnings from equity method investments	31	28	72	67
Interest expense, net of amounts capitalized	(470)	(424)	(928)	(840)
Other income (expense), net	78	52	138	98
Total other income and (expense)	(329)	(286)	(655)	(560)
Earnings (Loss) Before Income Taxes	(266)	(1,935)	784	(957)
Income taxes (benefit)	(139)	(587)	(25)	(273)
Consolidated Net Income (Loss)	(127)	(1,348)	809	(684)
Less:
Dividends on preferred and preference stock of subsidiaries	4	11	8	22
Net income attributable to noncontrolling interests	23	22	17	17
Net Income (Loss)	$ (154)	$ (1,381)	$ 784	$ (723)
Earnings (loss) per share —
Basic (in dollars per share)	$ (0.15)	$ (1.38)	$ 0.77	$ (0.73)
Diluted (in dollars per share)	$ (0.15)	$ (1.37)	$ 0.77	$ (0.72)
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	1,014	998	1,012	996
Diluted (in shares)	1,014	1,005	1,017	1,003
Cash dividends paid per share of common stock (in dollars per share)	$ 0.60	$ 0.58	$ 1.18	$ 1.14
ALABAMA POWER CO
Operating Revenues:
Retail electric revenues	$ 1,338	$ 1,333	$ 2,624	$ 2,560
Wholesale revenues, non-affiliates	65	68	139	133
Wholesale revenues, affiliates	31	32	82	65
Other revenues	69	51	131	108
Total operating revenues	1,503	1,484	2,976	2,866
Operating Expenses:
Fuel	347	303	672	601
Purchased power, non-affiliates	48	40	113	75
Purchased power, affiliates	43	34	80	62
Other operations and maintenance	402	389	788	772
Depreciation and amortization	189	183	379	364
Taxes other than income taxes	94	95	192	191
Total operating expenses	1,123	1,044	2,224	2,065
Operating Income (Loss)	380	440	752	801
Other Income and (Expense):
Allowance for equity funds used during construction	14	8	27	16
Interest expense, net of amounts capitalized	(80)	(77)	(158)	(153)
Other income (expense), net	12	15	15	25
Total other income and (expense)	(54)	(54)	(116)	(112)
Earnings (Loss) Before Income Taxes	326	386	636	689
Income taxes (benefit)	64	151	145	277
Consolidated Net Income (Loss)	262	235	491	412
Less:
Dividends on preferred and preference stock of subsidiaries	3	5	7	9
Net Income (Loss)	259	230	484	403
GEORGIA POWER CO
Operating Revenues:
Retail electric revenues	1,889	1,904	3,688	3,593
Wholesale revenues, non-affiliates	36	40	80	79
Wholesale revenues, affiliates	3	9	13	17
Other revenues	120	95	227	191
Total operating revenues	2,048	2,048	4,008	3,880
Operating Expenses:
Fuel	378	445	790	815
Purchased power, non-affiliates	111	103	233	191
Purchased power, affiliates	178	138	349	310
Other operations and maintenance	457	417	863	816
Depreciation and amortization	230	223	458	444
Taxes other than income taxes	106	101	214	199
Estimated loss on plants under construction	1,060	0	1,060	0
Total operating expenses	2,520	1,427	3,967	2,775
Operating Income (Loss)	(472)	621	41	1,105
Other Income and (Expense):
Allowance for equity funds used during construction			32	25
Interest expense, net of amounts capitalized	(102)	(104)	(208)	(205)
Other income (expense), net	35	34	73	71
Total other income and (expense)	(67)	(70)	(135)	(134)
Earnings (Loss) Before Income Taxes	(539)	551	(94)	971
Income taxes (benefit)	(143)	199	(50)	355
Consolidated Net Income (Loss)	(396)	352	(44)	616
Less:
Dividends on preferred and preference stock of subsidiaries	0	5	0	9
Net Income (Loss)	(396)	347	(44)	607
GULF POWER CO
Operating Revenues:
Retail electric revenues	301	318	591	596
Wholesale revenues, non-affiliates	13	12	26	30
Wholesale revenues, affiliates	14	10	42	47
Other revenues	16	17	33	34
Total operating revenues	344	357	692	707
Operating Expenses:
Fuel	91	88	173	196
Purchased power, non-affiliates	44	44	90	78
Other operations and maintenance	90	90	166	176
Depreciation and amortization	48	35	95	53
Taxes other than income taxes	28	28	58	55
Loss on Plant Scherer Unit 3	0	0	0	33
Total operating expenses	301	285	582	591
Operating Income (Loss)	43	72	110	116
Other Income and (Expense):
Interest expense, net of amounts capitalized	(13)	(13)	(26)	(24)
Other income (expense), net	1	2	3	3
Total other income and (expense)	(12)	(11)	(23)	(21)
Earnings (Loss) Before Income Taxes	31	61	87	95
Income taxes (benefit)	(11)	24	3	38
Consolidated Net Income (Loss)	42	37	84	57
Less:
Dividends on preferred and preference stock of subsidiaries	0	2	0	4
Net Income (Loss)	42	35	84	53
MISSISSIPPI POWER CO
Operating Revenues:
Retail electric revenues	212	222	406	422
Wholesale revenues, non-affiliates	55	62	118	124
Wholesale revenues, affiliates	19	15	54	20
Other revenues	11	4	20	9
Total operating revenues	297	303	598	575
Operating Expenses:
Fuel	98	102	197	180
Purchased power, non-affiliates	7	6	16	14
Other operations and maintenance	67	72	141	148
Depreciation and amortization	44	41	84	81
Taxes other than income taxes	27	26	54	52
Estimated loss on plants under construction	0	3,012	45	3,120
Total operating expenses	243	3,259	537	3,595
Operating Income (Loss)	54	(2,956)	61	(3,020)
Other Income and (Expense):
Allowance for equity funds used during construction	0	36	0	71
Interest expense, net of amounts capitalized	(21)	(17)	(39)	(37)
Other income (expense), net	27	3	27	5
Total other income and (expense)	6	22	(12)	39
Earnings (Loss) Before Income Taxes	60	(2,934)	49	(2,981)
Income taxes (benefit)	13	(881)	9	(908)
Consolidated Net Income (Loss)	47	(2,053)	40	(2,073)
Less:
Dividends on preferred and preference stock of subsidiaries	1	1	1	1
Net Income (Loss)	46	(2,054)	39	(2,074)
SOUTHERN POWER CO
Operating Revenues:
Wholesale revenues, non-affiliates	443	436	867	783
Wholesale revenues, affiliates	109	90	192	190
Other revenues	3	3	5	6
Total operating revenues	555	529	1,064	979
Operating Expenses:
Fuel	153	139	321	271
Purchased power, non-affiliates	39	40	100	70
Other operations and maintenance	91	97	184	190
Depreciation and amortization	125	129	240	247
Taxes other than income taxes	12	12	24	24
Asset impairment	119	0	119	0
Total operating expenses	539	417	988	802
Operating Income (Loss)	16	112	76	177
Other Income and (Expense):
Interest expense, net of amounts capitalized	(46)	(48)	(93)	(97)
Other income (expense), net	2	2	5	(2)
Total other income and (expense)	(44)	(46)	(88)	(99)
Earnings (Loss) Before Income Taxes	(28)	66	(12)	78
Income taxes (benefit)	(73)	(38)	(172)	(90)
Consolidated Net Income (Loss)	45	104	160	168
Less:
Net income attributable to noncontrolling interests	23	22	17	17
Net Income (Loss)	22	82	143	151
SOUTHERN Co GAS
Operating Revenues:
Natural gas revenues (includes alternative revenue programs of $(4), $-, $(27), and $9, respectively)	710	684	2,341	2,205
Alternative revenue programs	(4)	0	(27)	9
Other revenues	24	32	55	62
Total operating revenues	730	716	2,369	2,276
Operating Expenses:
Cost of natural gas	228	232	949	951
Cost of other sales	5	6	12	13
Other operations and maintenance	238	214	514	470
Depreciation and amortization	126	125	255	244
Taxes other than income taxes	48	44	125	114
Goodwill impairment	0	0	42	0
Loss on disposition	36	0	36	0
Total operating expenses	681	621	1,933	1,792
Operating Income (Loss)	49	95	436	484
Other Income and (Expense):
Earnings from equity method investments	31	29	74	68
Interest expense, net of amounts capitalized	(59)	(48)	(118)	(94)
Other income (expense), net	3	4	15	10
Total other income and (expense)	(25)	(15)	(29)	(16)
Earnings (Loss) Before Income Taxes	24	80	407	468
Income taxes (benefit)	55	31	159	180
Consolidated Net Income (Loss)	(31)	49	248	288
Less:
Net Income (Loss)	$ (31)	$ 49	$ 248	$ 288