Consolidated Statements of Cash Flows - Southern - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities:
Consolidated net income	$ 4,260	$ 3,849	$ 3,428
Adjustments to reconcile consolidated net income to net cash provided from operating activities —
Depreciation and amortization, total	5,266	4,986	4,064
Deferred income taxes	536	63	670
Utilization of federal tax credit carryforward	90	353	88
Allowance for equity funds used during construction	(235)	(268)	(224)
Pension, postretirement, and other employee benefits	(556)	(527)	(436)
Settlement of asset retirement obligations	(566)	(617)	(455)
Storm damage and reliability reserve accruals	163	124	430
Stock based compensation expense	132	137	127
Estimated loss on Plant Vogtle Units 3 and 4	(21)	(68)	183
Retail fuel cost under recovery – long-term	(32)	(206)	(2,166)
Natural gas cost under recovery – long-term	0	0	207
Storm damage cost recovery – long-term	(631)	0	0
Other, net	(39)	(138)	226
Changes in certain current assets and liabilities —
-Receivables	(372)	482	(771)
-Retail fuel cost under recovery	984	686	(100)
-Fossil fuel for generation	140	(368)	(125)
-Materials and supplies	(189)	(345)	(160)
-Natural gas cost under recovery	0	108	158
-Other current assets	(47)	(106)	(186)
-Accounts payable	492	(863)	1,021
-Customer refunds	83	(157)	119
-Natural gas cost over recovery	(21)	214	0
-Other current liabilities	145	191	153
Net cash provided from operating activities	9,788	7,553	6,302
Investing Activities:
Property additions	(8,955)	(9,095)	(7,923)
Nuclear decommissioning trust fund purchases	(1,551)	(1,142)	(1,125)
Nuclear decommissioning trust fund sales	1,535	1,121	1,112
Proceeds from dispositions	369	164	275
Cost of removal, net of salvage	(632)	(592)	(649)
Change in construction payables, net	106	18	203
Payments pursuant to LTSAs	(108)	(99)	(190)
Other investing activities	(164)	(43)	(133)
Net cash used for investing activities	(9,400)	(9,668)	(8,430)
Financing Activities:
Increase (decrease) in notes payable, net	(648)		(337)
Increase (decrease) in notes payable, net		973
Proceeds —
Long-term debt	6,159	8,972	5,132
Short-term borrowings	700	350	2,650
Common stock	143	36	1,808
Redemptions and repurchases —
Long-term debt	(2,222)	(4,294)	(2,158)
Short-term borrowings	(1,020)	(1,630)	(1,150)
Preferred stock	0	0	(298)
Distributions to noncontrolling interests	(185)	(234)	(259)
Payment of common stock dividends	(2,954)	(3,035)	(2,907)
Other financing activities	(181)	(139)	(145)
Net cash provided from (used for) financing activities	(208)	999	2,336
Net Change in Cash, Cash Equivalents, and Restricted Cash	180	(1,116)	208
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year	921	2,037	1,829
Cash, Cash Equivalents, and Restricted Cash at End of Year	1,101	921	2,037
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	2,538	2,184	1,758
Income taxes, net (excludes credit transfers)	176	132	146
Noncash transactions —
Accrued property additions at year-end	1,199	1,027	1,024
LTSA credits utilized from the sale of spare parts	13	23	0
Contributions from noncontrolling interests	0	0	15
Issuance of common stock under dividend reinvestment plan	$ 179	$ 0	$ 0