Condensed Consolidated Statements of Cash Flows (Unaudited) - SPC - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating Activities:
Net income	$ 2,123	$ 2,259
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	2,860	2,572
Deferred income taxes	453	247
Other, net	76	(116)
Changes in certain current assets and liabilities —
Receivables	(130)	(284)
Other current assets	61	(86)
Accounts payable	(695)	(247)
Accrued compensation	(421)	(372)
Other current liabilities	26	204
Net cash provided from operating activities	3,431	3,999
Investing Activities:
Property additions	(5,237)	(3,895)
Other investing activities	(153)	(172)
Net cash used for investing activities	(5,734)	(4,222)
Financing Activities:
Distributions to noncontrolling interests	(66)	(57)
Payment of common stock dividends	(1,494)	(1,487)
Other financing activities	(150)	(135)
Net cash provided from financing activities	2,467	513
Net Change in Cash, Cash Equivalents, and Restricted Cash	164	290
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,101	921
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,265	1,211
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	1,287	1,235
Income taxes, net (excludes credit transfers)	199	62
Noncash transactions —
Accrued property additions at end of period	1,091	805
Right-of-use assets obtained under operating leases	114	98
Reassessment of right-of-use assets under operating leases	0	(7)
SOUTHERN POWER CO
Operating Activities:
Net income	47	109
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	340	252
Deferred income taxes	(2)	13
Amortization of ITCs	(29)	(29)
Other, net	(18)	(24)
Changes in certain current assets and liabilities —
Receivables	(71)	(61)
Other current assets	2	(3)
Accounts payable	(20)	(22)
Accrued compensation	(11)	(11)
Other current liabilities	(6)	6
Net cash provided from operating activities	232	230
Investing Activities:
Property additions	(392)	(114)
Payments pursuant to LTSAs	(26)	(20)
Other investing activities	0	7
Net cash used for investing activities	(418)	(127)
Financing Activities:
Increase in notes payable, net	201	87
Capital contributions from parent company	146	8
Capital contributions from noncontrolling interests	23	11
Distributions to noncontrolling interests	(66)	(57)
Payment of common stock dividends	(139)	(131)
Other financing activities	(4)	(3)
Net cash provided from financing activities	161	(85)
Net Change in Cash, Cash Equivalents, and Restricted Cash	(25)	18
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	168	144
Cash, Cash Equivalents, and Restricted Cash at End of Period	143	162
Supplemental Cash Flow Information:
Interest, net of amounts capitalized	59	64
Income taxes, net (excludes credit transfers)	52	14
Noncash transactions —
Accrued property additions at end of period	60	47
Right-of-use assets obtained under operating leases	2	5
Reassessment of right-of-use assets under operating leases	$ 0	$ (7)