Condensed Consolidated Statements of Income (Unaudited) - Southern - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Operating Revenues:
Total operating revenues	$ 7,823	$ 7,274	$ 22,572	$ 20,383
Operating Expenses:
Other operations and maintenance	1,643	1,662	4,948	4,522
Depreciation and amortization	1,422	1,210	4,030	3,537
Taxes other than income taxes	288	375	1,136	1,155
Total operating expenses	5,229	4,906	16,204	14,373
Operating Income	2,594	2,368	6,368	6,010
Other Income and (Expense):
Allowance for equity funds used during construction	90	58	243	167
Earnings from equity method investments	33	31	76	107
Interest expense, net of amounts capitalized	(755)	(692)	(2,343)	(2,050)
Other income (expense), net	149	147	459	450
Total other income and (expense)	(483)	(456)	(1,565)	(1,326)
Earnings Before Income Taxes	2,111	1,912	4,803	4,684
Income taxes	404	377	973	890
Consolidated Net Income	1,707	1,535	3,830	3,794
Net loss attributable to noncontrolling interests	(4)	0	(95)	(73)
Consolidated Net Income Attributable to Southern Company	$ 1,711	$ 1,535	$ 3,925	$ 3,867
Earnings per share -
Basic (in dollars per share)	$ 1.55	$ 1.40	$ 3.56	$ 3.53
Diluted (in dollars per share)	$ 1.54	$ 1.39	$ 3.54	$ 3.51
Average number of shares of common stock outstanding — (in millions)
Basic (in shares)	1,102	1,097	1,101	1,096
Diluted (in shares)	1,110	1,103	1,108	1,102
Retail electric revenues
Operating Revenues:
Total operating revenues	$ 5,707	$ 5,366	$ 15,065	$ 13,793
Wholesale electric revenues
Operating Revenues:
Total operating revenues	832	721	2,257	1,919
Other electric revenues
Operating Revenues:
Total operating revenues	262	222	724	631
Natural Gas
Operating Revenues:
Total operating revenues	734	682	3,552	3,220
Other revenues
Operating Revenues:
Total operating revenues	288	283	974	820
Operating Expenses:
Total cost of sales	156	166	522	464
Fuel
Operating Expenses:
Total cost of sales	1,345	1,146	3,753	3,174
Purchased power
Operating Expenses:
Total cost of sales	259	249	769	669
Natural gas
Operating Expenses:
Total cost of sales	116	98	1,046	852
Alternative revenue programs
Operating Revenues:
Total operating revenues	$ (5)	$ 1	$ (32)	$ 46