Condensed Consolidated Statements of Cash Flows (Unaudited) - SPC - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating Activities:
Consolidated net income	$ 3,053	$ 3,566
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	3,699	3,084
Deferred income taxes	(52)	608
Utilization of federal investment tax credits	195	266
Other, net	(67)	(119)
Changes in certain current assets and liabilities —
Receivables	524	(316)
Other current assets	(32)	(310)
Accounts payable	(1,031)	805
Accrued taxes	376	167
Other current liabilities	66	(82)
Net cash provided from operating activities	5,740	5,017
Investing Activities:
Property additions	(6,561)	(5,502)
Other investing activities	(139)	(63)
Net cash used for investing activities	(6,721)	(5,952)
Financing Activities:
Increase (decrease) in notes payable, net	(298)	(349)
Capital contributions from noncontrolling interests	21	73
Distributions to noncontrolling interests	(148)	(175)
Payment of common stock dividends	(2,271)	(2,166)
Other financing activities	(141)	(235)
Net cash provided from financing activities	834	1,119
Net Change in Cash, Cash Equivalents, and Restricted Cash	(147)	184
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	2,037	1,829
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,890	2,013
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	1,694	1,425
Income taxes, net	11	160
Noncash transactions —
Accrued property additions at end of period	1,224	872
Right-of-use assets obtained under operating leases	76	27
Reassessment of right-of-use assets under operating leases	0	40
SOUTHERN POWER CO
Operating Activities:
Consolidated net income	220	210
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	395	404
Deferred income taxes	1	21
Utilization of federal investment tax credits	179	218
Amortization of investment tax credits	(44)	(44)
Gain on dispositions, net	(20)	(2)
Other, net	4	1
Changes in certain current assets and liabilities —
Receivables	100	(124)
Prepaid income taxes	31	22
Other current assets	(14)	(15)
Accounts payable	(70)	95
Accrued taxes	9	55
Other current liabilities	8	(14)
Net cash provided from operating activities	799	827
Investing Activities:
Acquisitions, net of cash acquired	(181)	0
Property additions	(40)	(64)
Proceeds from dispositions	59	48
Change in construction payables	(18)	(60)
Payments pursuant to LTSAs	(49)	(52)
Other investing activities	5	0
Net cash used for investing activities	(224)	(128)
Financing Activities:
Increase (decrease) in notes payable, net	136
Increase (decrease) in notes payable, net		(5)
Redemptions — Senior notes	(290)	(677)
Capital contributions from parent company	16	330
Capital contributions from noncontrolling interests	21	73
Distributions to noncontrolling interests	(148)	(175)
Payment of common stock dividends	(189)	(148)
Other financing activities	3	(1)
Net cash provided from financing activities	(451)	(603)
Net Change in Cash, Cash Equivalents, and Restricted Cash	124	96
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	133	135
Cash, Cash Equivalents, and Restricted Cash at End of Period	257	231
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	103	120
Income taxes, net	(124)	(202)
Noncash transactions —
Accrued property additions at end of period	23	30
Right-of-use assets obtained under operating leases	7	0
Reassessment of right-of-use assets under operating leases	$ 0	$ 40