Condensed Consolidated Statements of Cash Flows (Unaudited) - Southern - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating Activities:
Net income (loss)	$ 991	$ 1,107
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	989	964
Deferred income taxes	40	140
Allowance for equity funds used during construction	(51)	(46)
Pension, postretirement, and other employee benefits	(123)	(78)
Settlement of asset retirement obligations	(87)	(109)
Stock based compensation expense	85	83
Estimated loss on Plant Vogtle Units 3 and 4	0	48
Storm damage accruals	52	54
Gain on dispositions, net	(20)	(41)
Natural gas cost under recovery – long-term	162	(185)
Retail fuel cost under recovery – long-term	(130)	0
Other, net	7	114
Changes in certain current assets and liabilities —
-Receivables	(217)	308
-Prepayments	(86)	(98)
-Materials and supplies	(28)	(27)
-Natural gas for sale, net of temporary LIFO liquidation	450	456
-Natural gas cost under recovery	(40)	(487)
-Other current assets	87	90
-Accounts payable	132	(216)
-Accrued taxes	(58)	(212)
-Accrued compensation	(470)	(417)
-Accrued interest	(128)	(90)
-Retail fuel cost over recovery	0	(53)
-Other current liabilities	35	(63)
Net cash provided from operating activities	1,592	1,242
Investing Activities:
Business acquisitions, net of cash acquired	0	(345)
Property additions	(1,419)	(1,678)
Nuclear decommissioning trust fund purchases	(294)	(550)
Nuclear decommissioning trust fund sales	289	546
Cost of removal, net of salvage	(227)	(85)
Change in construction payables, net	23	(116)
Payments pursuant to LTSAs	(37)	(60)
Other investing activities	110	45
Net cash used for investing activities	(1,555)	(2,243)
Financing Activities:
Increase in notes payable	137	182
Proceeds —
Long-term debt	700	2,150
Short-term borrowings	850	325
Common stock	38	14
Redemptions and repurchases —
Long-term debt	(977)	(384)
Short-term borrowings	(100)	(25)
Capital contributions from noncontrolling interests	73	313
Distributions to noncontrolling interests	(97)	(46)
Payment of common stock dividends	(702)	(678)
Other financing activities	(115)	(117)
Net cash provided from (used for) financing activities	(193)	1,734
Net Change in Cash, Cash Equivalents, and Restricted Cash	(156)	733
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,829	1,068
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,673	1,801
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	515	519
Income taxes, net	(8)	(51)
Noncash transactions —
Accrued property additions at year-end	863	872
Contributions from noncontrolling interests	0	89
Contributions of wind turbine equipment	0	82
Right-of-use assets obtained under leases	3	76
Reassessment of right-of-use assets under operating leases	$ 40	$ 0