Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Revenues:
Total operating revenues	$ 5,018	$ 5,412
Operating Expenses:
Total cost of natural gas	439	686
Other operations and maintenance	1,296	1,314
Depreciation and amortization	857	751
Taxes other than income taxes	330	329
(Gain) loss on dispositions, net	(39)	(2,497)
Total operating expenses	3,755	1,721
Operating Income	1,263	3,691
Other Income and (Expense):
Allowance for equity funds used during construction	34	32
Earnings from equity method investments	42	48
Interest expense, net of amounts capitalized	(456)	(430)
Other income (expense), net	103	78
Total other income and (expense)	(277)	(272)
Earnings Before Income Taxes	986	3,419
Income taxes	145	1,360
Consolidated Net Income	841	2,059
Dividends on preferred stock of subsidiaries	4	4
Net loss attributable to noncontrolling interests	(31)	(29)
Net Income (Loss)	$ 868	$ 2,084
Earnings per share -
Basic (in dollars per share)	$ 0.82	$ 2.01
Diluted (in dollars per share)	$ 0.81	$ 1.99
Average number of shares of common stock outstanding (in millions)
Basic (in shares)	1,057	1,038
Diluted (in shares)	1,067	1,045
Retail electric revenues
Operating Revenues:
Total operating revenues	$ 3,078	$ 3,084
Wholesale electric revenues
Operating Revenues:
Total operating revenues	418	499
Other electric revenues
Operating Revenues:
Total operating revenues	151	168
Natural gas
Operating Revenues:
Total operating revenues	1,249	1,474
Operating Expenses:
Total cost of natural gas	439	686
Other
Operating Revenues:
Total operating revenues	122	187
Operating Expenses:
Total cost of natural gas	55	118
Fuel
Operating Expenses:
Total cost of natural gas	636	850
Purchased power
Operating Expenses:
Total cost of natural gas	181	170
Alternative revenue programs
Operating Revenues:
Total operating revenues	9	(2)
ALABAMA POWER CO
Operating Revenues:
Total operating revenues	1,351	1,408
Operating Expenses:
Other operations and maintenance	350	409
Depreciation and amortization	200	199
Taxes other than income taxes	106	103
Total operating expenses	929	1,070
Operating Income	422	338
Other Income and (Expense):
Allowance for equity funds used during construction	10	14
Interest expense, net of amounts capitalized	(88)	(83)
Other income (expense), net	24	14
Total other income and (expense)	(54)	(55)
Earnings Before Income Taxes	368	283
Income taxes	84	62
Consolidated Net Income	284	221
Dividends on preferred stock of subsidiaries	4	4
Net Income (Loss)	280	217
ALABAMA POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	1,205	1,213
ALABAMA POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	56	61
ALABAMA POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	19	60
ALABAMA POWER CO | Other
Operating Revenues:
Total operating revenues	71	74
ALABAMA POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	215	301
ALABAMA POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	40	37
ALABAMA POWER CO | Purchased power, affiliates
Operating Expenses:
Total cost of natural gas	18	21
GEORGIA POWER CO
Operating Revenues:
Total operating revenues	1,825	1,833
Operating Expenses:
Other operations and maintenance	465	446
Depreciation and amortization	352	240
Taxes other than income taxes	113	106
Total operating expenses	1,419	1,385
Operating Income	406	448
Other Income and (Expense):
Interest expense, net of amounts capitalized	(111)	(96)
Other income (expense), net	52	40
Total other income and (expense)	(59)	(56)
Earnings Before Income Taxes	347	392
Income taxes	16	81
Consolidated Net Income	331	311
Net Income (Loss)	331	311
GEORGIA POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	1,675	1,668
GEORGIA POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	26	32
GEORGIA POWER CO | Other
Operating Revenues:
Total operating revenues	124	133
GEORGIA POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	231	299
GEORGIA POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	129	118
GEORGIA POWER CO | Purchased power, affiliates
Operating Expenses:
Total cost of natural gas	129	176
MISSISSIPPI POWER CO
Operating Revenues:
Total operating revenues	277	287
Operating Expenses:
Other operations and maintenance	76	61
Depreciation and amortization	42	48
Taxes other than income taxes	29	26
Total operating expenses	231	231
Operating Income	46	56
Other Income and (Expense):
Interest expense, net of amounts capitalized	(16)	(17)
Other income (expense), net	8	5
Total other income and (expense)	(8)	(12)
Earnings Before Income Taxes	38	44
Income taxes	6	7
Consolidated Net Income	32	37
Net Income (Loss)	32	37
MISSISSIPPI POWER CO | Retail electric revenues
Operating Revenues:
Total operating revenues	199	203
MISSISSIPPI POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	51	57
MISSISSIPPI POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	21	22
MISSISSIPPI POWER CO | Other
Operating Revenues:
Total operating revenues	6	5
MISSISSIPPI POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	79	93
MISSISSIPPI POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	5	3
SOUTHERN POWER CO
Operating Revenues:
Total operating revenues	375	443
Operating Expenses:
Other operations and maintenance	79	83
Depreciation and amortization	117	119
Taxes other than income taxes	9	11
(Gain) loss on dispositions, net	(39)	1
Total operating expenses	287	383
Operating Income	88	60
Other Income and (Expense):
Interest expense, net of amounts capitalized	(39)	(44)
Other income (expense), net	2	2
Total other income and (expense)	(37)	(42)
Earnings Before Income Taxes	51	18
Income taxes	7	(9)
Consolidated Net Income	44	27
Net loss attributable to noncontrolling interests	(31)	(29)
Net Income (Loss)	75	56
SOUTHERN POWER CO | Wholesale electric revenues
Operating Revenues:
Total operating revenues	286	352
SOUTHERN POWER CO | Other
Operating Revenues:
Total operating revenues	3	4
SOUTHERN POWER CO | Fuel
Operating Expenses:
Total cost of natural gas	107	145
SOUTHERN POWER CO | Purchased power
Operating Expenses:
Total cost of natural gas	14	24
SOUTHERN Co GAS
Operating Revenues:
Total operating revenues	1,249	1,474
Operating Expenses:
Other operations and maintenance	258	235
Depreciation and amortization	120	118
Taxes other than income taxes	72	82
Total operating expenses	889	1,121
Operating Income	360	353
Other Income and (Expense):
Earnings from equity method investments	43	48
Interest expense, net of amounts capitalized	(58)	(59)
Other income (expense), net	9	5
Total other income and (expense)	(6)	(6)
Earnings Before Income Taxes	354	347
Income taxes	79	77
Consolidated Net Income	275	270
Net Income (Loss)	275	270
SOUTHERN Co GAS | Natural gas
Operating Revenues:
Total operating revenues	1,240	1,476
Operating Expenses:
Total cost of natural gas	439	686
SOUTHERN Co GAS | Alternative revenue programs
Operating Revenues:
Total operating revenues	$ 9	$ (2)