Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Revenues:
Total operating revenues	$ 5,412	$ 6,372
Operating Expenses:
Other operations and maintenance	1,312	1,451
Depreciation and amortization	751	769
Taxes other than income taxes	329	355
Estimated loss on plants under construction	2	44
Gain on dispositions, net	(2,497)	0
Total operating expenses	1,721	4,996
Operating Income (Loss)	3,691	1,376
Other Income and (Expense):
Allowance for equity funds used during construction	32	30
Earnings from equity method investments	48	41
Interest expense, net of amounts capitalized	(430)	(458)
Other income (expense), net	78	60
Total other income and (expense)	(272)	(327)
Earnings (Loss) Before Income Taxes	3,419	1,049
Income taxes	1,360	113
Consolidated net income (loss)	2,059	936
Dividends on preferred stock of subsidiaries	4	4
Net loss attributable to noncontrolling interests	(29)	(6)
Net Income (Loss)	$ 2,084	$ 938
Earnings per share -
Basic (in dollars per share)	$ 2.01	$ 0.93
Diluted (in dollars per share)	$ 1.99	$ 0.92
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	1,038	1,011
Diluted (in shares)	1,045	1,016
Retail electric revenues
Operating Revenues:
Total operating revenues	$ 3,084	$ 3,568
Wholesale electric revenues
Operating Revenues:
Total operating revenues	499	623
Other electric revenues
Operating Revenues:
Total operating revenues	168	161
Natural gas
Operating Revenues:
Total operating revenues	1,474	1,607
Operating Expenses:
Total cost of natural gas	686	720
Other
Operating Revenues:
Total operating revenues	187	413
Operating Expenses:
Total cost of natural gas	118	289
Fuel
Operating Expenses:
Total cost of natural gas	850	1,101
Purchased power
Operating Expenses:
Total cost of natural gas	170	267
ALABAMA POWER CO
Operating Revenues:
Total operating revenues	1,408	1,473
Operating Expenses:
Other operations and maintenance	409	387
Depreciation and amortization	199	189
Taxes other than income taxes	103	98
Total operating expenses	1,070	1,101
Operating Income (Loss)	338	372
Other Income and (Expense):
Allowance for equity funds used during construction	14	13
Interest expense, net of amounts capitalized	(83)	(79)
Other income (expense), net	14	5
Total other income and (expense)	(55)	(61)
Earnings (Loss) Before Income Taxes	283	311
Income taxes	62	82
Consolidated net income (loss)	221	229
Dividends on preferred stock of subsidiaries	4	4
Net Income (Loss)	217	225
ALABAMA POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	1,213	1,285
ALABAMA POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	61	74
ALABAMA POWER CO | Other
Operating Revenues:
Total operating revenues	74	63
ALABAMA POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	301	326
ALABAMA POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	37	64
ALABAMA POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	60	51
ALABAMA POWER CO | Purchased power, affiliates
Operating Expenses:
Total cost of natural gas	21	37
GEORGIA POWER CO
Operating Revenues:
Total operating revenues	1,833	1,961
Operating Expenses:
Other operations and maintenance	446	408
Depreciation and amortization	240	228
Taxes other than income taxes	106	108
Total operating expenses	1,385	1,448
Operating Income (Loss)	448	513
Other Income and (Expense):
Interest expense, net of amounts capitalized	(96)	(106)
Other income (expense), net	40	38
Total other income and (expense)	(56)	(68)
Earnings (Loss) Before Income Taxes	392	445
Income taxes	81	93
Consolidated net income (loss)	311	352
Net Income (Loss)	311	352
GEORGIA POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	1,668	1,798
GEORGIA POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	29	44
GEORGIA POWER CO | Other
Operating Revenues:
Total operating revenues	133	109
GEORGIA POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	299	412
GEORGIA POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	118	121
GEORGIA POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	3	10
GEORGIA POWER CO | Purchased power, affiliates
Operating Expenses:
Total cost of natural gas	176	171
MISSISSIPPI POWER CO
Operating Revenues:
Total operating revenues	287	302
Operating Expenses:
Other operations and maintenance	59	75
Depreciation and amortization	48	41
Taxes other than income taxes	26	28
Estimated loss on plants under construction	2	44
Total operating expenses	231	295
Operating Income (Loss)	56	7
Other Income and (Expense):
Interest expense, net of amounts capitalized	(17)	(19)
Other income (expense), net	5	1
Total other income and (expense)	(12)	(18)
Earnings (Loss) Before Income Taxes	44	(11)
Income taxes	7	(4)
Consolidated net income (loss)	37	(7)
Net Income (Loss)	37	(7)
MISSISSIPPI POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	203	194
MISSISSIPPI POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	57	68
MISSISSIPPI POWER CO | Other
Operating Revenues:
Total operating revenues	5	6
MISSISSIPPI POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	93	98
MISSISSIPPI POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	3	9
MISSISSIPPI POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	22	34
SOUTHERN POWER CO
Operating Revenues:
Total operating revenues	443	509
Operating Expenses:
Other operations and maintenance	84	93
Depreciation and amortization	119	114
Taxes other than income taxes	11	12
Total operating expenses	383	449
Operating Income (Loss)	60	60
Other Income and (Expense):
Interest expense, net of amounts capitalized	(44)	(47)
Other income (expense), net	2	3
Total other income and (expense)	(42)	(44)
Earnings (Loss) Before Income Taxes	18	16
Income taxes	(9)	(99)
Consolidated net income (loss)	27	115
Net loss attributable to noncontrolling interests	(29)	(6)
Net Income (Loss)	56	121
SOUTHERN POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	352	424
SOUTHERN POWER CO | Other
Operating Revenues:
Total operating revenues	4	2
SOUTHERN POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	145	169
SOUTHERN POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	24	61
SOUTHERN POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	87	83
SOUTHERN Co GAS
Operating Revenues:
Total operating revenues	1,474	1,639
Operating Expenses:
Other operations and maintenance	235	276
Depreciation and amortization	118	129
Taxes other than income taxes	82	77
Goodwill impairment	0	42
Total operating expenses	1,121	1,251
Operating Income (Loss)	353	388
Other Income and (Expense):
Earnings from equity method investments	48	42
Interest expense, net of amounts capitalized	(59)	(59)
Other income (expense), net	5	12
Total other income and (expense)	(6)	(5)
Earnings (Loss) Before Income Taxes	347	383
Income taxes	77	104
Consolidated net income (loss)	270	279
Net Income (Loss)	270	279
SOUTHERN Co GAS | Natural gas
Operating Revenues:
Total operating revenues	1,476	1,631
Operating Expenses:
Total cost of natural gas	686	720
SOUTHERN Co GAS | Other
Operating Revenues:
Total operating revenues	0	32
Operating Expenses:
Total cost of natural gas	0	7
SOUTHERN Co GAS | Alternative revenue programs
Operating Revenues:
Total operating revenues	$ (2)	$ (24)