Condensed Consolidated Statements of Income (Unaudited) - Southern - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Operating Revenues:
Total operating revenues	$ 6,977	$ 6,973	$ 15,374	$ 14,748
Operating Expenses:
Other operations and maintenance	1,705	1,685	3,359	3,305
Depreciation and amortization	1,434	1,323	2,854	2,608
Taxes other than income taxes	367	403	831	848
Total operating expenses	5,201	5,209	11,580	10,974
Operating Income	1,776	1,764	3,794	3,774
Other Income and (Expense):
Allowance for equity funds used during construction	128	80	248	153
Earnings from equity method investments	86	10	136	43
Interest expense, net of amounts capitalized	(796)	(874)	(1,573)	(1,588)
Other income (expense), net	181	162	336	310
Total other income and (expense)	(401)	(622)	(853)	(1,082)
Earnings Before Income Taxes	1,375	1,142	2,941	2,692
Income taxes	187	289	414	569
Consolidated Net Income	1,188	853	2,527	2,123
Net income (loss) attributable to noncontrolling interests	14	(27)	(4)	(91)
Consolidated Net Income Attributable to Southern Company	$ 1,174	$ 880	$ 2,531	$ 2,214
Earnings per share -
Basic (in dollars per share)	$ 1.03	$ 0.80	$ 2.24	$ 2.01
Diluted (in dollars per share)	$ 1.03	$ 0.79	$ 2.23	$ 2.00
Average number of shares of common stock outstanding — (in millions)
Basic (in shares)	1,137	1,101	1,130	1,100
Diluted (in shares)	1,141	1,108	1,134	1,107
Retail electric revenues
Operating Revenues:
Total operating revenues	$ 4,745	$ 4,758	$ 9,385	$ 9,358
Wholesale electric revenues
Operating Revenues:
Total operating revenues	699	681	1,664	1,425
Other electric revenues
Operating Revenues:
Total operating revenues	242	220	507	463
Natural Gas
Operating Revenues:
Total operating revenues	966	979	3,157	2,818
Other revenues
Operating Revenues:
Total operating revenues	325	335	661	684
Operating Expenses:
Total cost of sales	176	167	357	366
Fuel
Operating Expenses:
Total cost of sales	1,054	1,116	2,544	2,408
Purchased power
Operating Expenses:
Total cost of sales	288	260	532	510
Natural gas
Operating Expenses:
Total cost of sales	177	255	1,103	929
Alternative revenue programs
Operating Revenues:
Total operating revenues	$ 4	$ (9)	$ 2	$ (28)

Condensed Consolidated Statements of Cash Flows (Unaudited) - Southern - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Operating Activities:
Consolidated Net Income	$ 2,527	$ 2,123
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	3,176	2,860
Deferred income taxes	310	453
Allowance for equity funds used during construction	(248)	(153)
Pension, postretirement, and other employee benefits	(277)	(253)
Settlement of asset retirement obligations	(283)	(285)
Stock based compensation expense	112	102
Storm damage cost recovery – long-term	(139)	(238)
Other, net	(87)	76
Changes in certain current assets and liabilities —
Receivables	116	(130)
Retail fuel cost under recovery	188	158
Prepayments	(96)	(109)
Materials and supplies	(178)	35
Natural gas for sale, net of temporary LIFO liquidation	197	233
Other current assets	(60)	61
Accounts payable	(403)	(695)
Accrued taxes	(221)	(245)
Accrued compensation	(459)	(421)
Other current liabilities	105	(141)
Net cash provided from operating activities	4,280	3,431
Investing Activities:
Property additions	(6,639)	(5,456)
Contributions in aid of construction	313	219
Nuclear decommissioning trust fund purchases	(994)	(777)
Nuclear decommissioning trust fund sales	994	777
Cost of removal, net of salvage	(349)	(304)
Other investing activities	(83)	(193)
Net cash used for investing activities	(6,758)	(5,734)
Financing Activities:
Increase in notes payable, net	1,415
Proceeds —
Long-term debt	4,790	6,319
Short-term borrowings	350	200
Common stock	2,596	62
Redemptions and repurchases —
Long-term debt	(3,085)	(2,254)
Short-term borrowings	(350)	0
Distributions to noncontrolling interests	(76)	(66)
Payment of common stock dividends	(1,579)	(1,494)
Other financing activities	(233)	(150)
Net cash provided from financing activities	3,828	2,467
Net Change in Cash, Cash Equivalents, and Restricted Cash	1,350	164
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,640	1,101
Cash, Cash Equivalents, and Restricted Cash at End of Period	2,990	1,265
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	1,472	1,287
Income taxes, net (excludes credit transfers)	146	199
Noncash transactions —
Accrued property additions at end of period	1,409	1,091
Right-of-use assets obtained under operating leases	107	114
Right-of-use assets obtained under finance leases	5	14
Issuance of common stock under dividend reinvestment plan	$ 109	$ 112

Condensed Consolidated Balance Sheets (Unaudited) - Southern - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Current Assets:
Cash and cash equivalents	$ 2,984	$ 1,639
Receivables —
Customer accounts	2,301	2,251
Unbilled revenues	938	931
Under recovered fuel clause revenues	227	316
Other accounts and notes	580	655
Accumulated provision for uncollectible accounts	(98)	(84)
Materials and supplies	2,380	2,202
Fossil fuel for generation	728	735
Natural gas for sale	198	396
Prepaid expenses	370	327
Regulatory assets – asset retirement obligations	353	353
Other regulatory assets	916	709
Other current assets	501	487
Total current assets	12,378	10,917
Property, Plant, and Equipment:
In service	151,437	146,114
Less: Accumulated depreciation	45,868	43,483
Plant in service, net of depreciation	105,569	102,631
Other utility plant, net	0	307
Nuclear fuel, at amortized cost	902	897
Construction work in progress	11,874	10,534
Total property, plant, and equipment	118,345	114,369
Other Property and Investments:
Goodwill	5,161	5,161
Nuclear decommissioning trusts, at fair value	3,110	2,947
Equity investments in unconsolidated subsidiaries	1,428	1,318
Other intangible assets, net of amortization	287	300
Miscellaneous property and investments	701	714
Total other property and investments	10,687	10,440
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,369	1,358
Deferred charges related to income taxes	1,094	948
Prepaid pension costs	3,544	3,257
Unamortized loss on reacquired debt	179	187
Deferred under recovered fuel clause revenues	151	252
Regulatory assets – asset retirement obligations, deferred	5,042	5,129
Other regulatory assets, deferred	7,577	7,427
Other deferred charges and assets	1,661	1,436
Total deferred charges and other assets	20,617	19,994
Total Assets	162,027	155,720
Current Liabilities:
Securities due within one year	4,694	6,220
Notes payable	2,132	722
Accounts payable	3,374	3,710
Customer deposits	487	475
Accrued taxes —
Accrued income taxes	70	22
Other accrued taxes	695	982
Accrued interest	812	807
Accrued compensation	927	1,418
Asset retirement obligations	658	662
Liabilities from risk management activities, net of collateral	151	118
Operating lease obligations	207	197
Natural gas cost over recovery	191	158
Other regulatory liabilities	190	240
Other current liabilities	1,146	1,157
Total current liabilities	15,734	16,888
Long-term Debt	68,756	65,649
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	12,628	12,133
Deferred credits related to income taxes	4,611	4,712
Accumulated deferred ITCs	2,066	2,002
Employee benefit obligations	1,029	980
Operating lease obligations, deferred	1,298	1,287
Asset retirement obligations, deferred	8,917	8,939
Other cost of removal obligations	2,084	2,036
Other regulatory liabilities, deferred	712	722
Other deferred credits and liabilities	1,850	1,505
Total deferred credits and other liabilities	35,195	34,316
Total Liabilities	119,685	116,853
Total Stockholders' Equity	42,342	38,867
Total Liabilities and Stockholders' Equity	$ 162,027	$ 155,720