Condensed Consolidated Statements of Cash Flows (Unaudited) - SPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Operating Activities:
Net income	$ 2,259	$ 1,622
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	2,572	2,436
Deferred income taxes	243	(34)
Utilization of federal tax credits	4	110
Other, net	(95)	(24)
Changes in certain current assets and liabilities —
Receivables	(284)	758
Other current assets	(94)	40
Accounts payable	(247)	(997)
Accrued compensation	(372)	(378)
Other current liabilities	185	101
Net cash provided from operating activities	3,999	2,900
Investing Activities:
Property additions	(3,895)	(3,898)
Other investing activities	(172)	(100)
Net cash used for investing activities	(4,222)	(4,288)
Financing Activities:
Increase (decrease) in notes payable, net	(1,125)	(375)
Payment of common stock dividends	(1,487)	(1,506)
Other financing activities	(192)	(187)
Net cash provided from financing activities	513	1,595
Net Change in Cash, Cash Equivalents, and Restricted Cash	290	207
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	921	2,037
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,211	2,244
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	1,235	1,043
Income taxes, net	62	(40)
Noncash transactions —
Accrued property additions at end of period	805	810
Right-of-use assets obtained under operating leases	98	44
Reassessment of right-of-use assets under operating leases	(7)	0
SOUTHERN POWER CO
Operating Activities:
Net income	109	109
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	252	260
Deferred income taxes	9	(14)
Utilization of federal tax credits	4	99
Amortization of ITCs	(29)	(29)
Gain on dispositions, net	0	(20)
Other, net	(24)	(19)
Changes in certain current assets and liabilities —
Receivables	(61)	77
Prepaid income taxes	0	9
Other current assets	(3)	(13)
Accounts payable	(22)	(91)
Accrued compensation	(11)	(11)
Other current liabilities	6	0
Net cash provided from operating activities	230	357
Investing Activities:
Property additions	(114)	(25)
Proceeds from dispositions	0	59
Change in construction payables	(5)	(20)
Payments pursuant to LTSAs	(20)	(31)
Other investing activities	12	(1)
Net cash used for investing activities	(127)	(18)
Financing Activities:
Increase (decrease) in notes payable, net	87
Increase (decrease) in notes payable, net		(124)
Capital contributions from parent company	8	13
Capital contributions from noncontrolling interests	11	21
Distributions to noncontrolling interests	(57)	(87)
Payment of common stock dividends	(131)	(126)
Other financing activities	(3)	3
Net cash provided from financing activities	(85)	(300)
Net Change in Cash, Cash Equivalents, and Restricted Cash	18	39
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	144	133
Cash, Cash Equivalents, and Restricted Cash at End of Period	162	172
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	64	74
Income taxes, net	14	(64)
Noncash transactions —
Accrued property additions at end of period	47	7
Right-of-use assets obtained under operating leases	5	0
Reassessment of right-of-use assets under operating leases	$ (7)	$ 0