Condensed Consolidated Statements of Income (Unaudited) - SPC - USD ($) $ 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):
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
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
SOUTHERN POWER CO
Operating Revenues:
Total operating revenues	613	600	1,726	1,597
Operating Expenses:
Other operations and maintenance	128	126	384	367
Depreciation and amortization	247	133	576	378
Taxes other than income taxes	12	12	37	34
Total operating expenses	587	457	1,611	1,293
Operating Income	26	143	115	304
Other Income and (Expense):
Interest expense, net of amounts capitalized	(25)	(30)	(76)	(89)
Other income (expense), net	4	2	10	8
Total other income and (expense)	(21)	(28)	(66)	(81)
Earnings Before Income Taxes	5	115	49	223
Income taxes	6	33	3	32
Consolidated Net Income	(1)	82	46	191
Net loss attributable to noncontrolling interests	(4)	0	(95)	(73)
Consolidated Net Income Attributable to Southern Company	3	82	141	264
SOUTHERN POWER CO | Wholesale revenues, non-affiliates
Operating Revenues:
Total operating revenues	498	489	1,368	1,286
SOUTHERN POWER CO | Wholesale revenues, affiliates
Operating Revenues:
Total operating revenues	112	102	341	280
SOUTHERN POWER CO | Other revenues
Operating Revenues:
Total operating revenues	3	9	17	31
SOUTHERN POWER CO | Fuel
Operating Expenses:
Total cost of sales	168	166	523	454
SOUTHERN POWER CO | Purchased power
Operating Expenses:
Total cost of sales	$ 32	$ 20	$ 91	$ 60