CONSOLIDATED STATEMENTS OF CASH FLOWS - SWEPCo - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING ACTIVITIES
Net Income	$ 3,696	$ 2,976	$ 2,213
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	3,380	3,290	3,090
Deferred Income Taxes	311	58	185
Asset Impairments and Other Related Charges	66	143	86
Allowance for Equity Funds Used During Construction	(245)	(211)	(175)
Mark-to-Market of Risk Management Contracts	(116)	(81)	9
Deferred Fuel Over/Under-Recovery, Net	133	277	893
Change in Other Noncurrent Assets	(559)	(348)	(446)
Change in Other Noncurrent Liabilities	269	306	29
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(246)	(156)	236
Fuel, Materials and Supplies	115	172	(504)
Accounts Payable	252	85	(253)
Accrued Taxes, Net	32	240	22
Other Current Assets	85	(13)	(44)
Other Current Liabilities	103	182	(162)
Net Cash Flows from Operating Activities	6,944	6,804	5,012
INVESTING ACTIVITIES
Construction Expenditures	(8,453)	(7,631)	(7,378)
Acquisitions of Generation Facilities	(3,453)	(399)	(155)
Other Investing Activities	118	143	122
Net Cash Flows Used for Investing Activities	(11,939)	(7,596)	(6,267)
FINANCING ACTIVITIES
Issuance of Long-term Debt	8,261	5,117	5,463
Change in Short-term Debt – Nonaffiliated	(658)	(159)	(1,223)
Retirement of Long-term Debt	(3,649)	(2,685)	(2,196)
Principal Payments for Finance Lease Obligations	(51)	(65)	(68)
Dividends Paid on Common Stock	(2,008)	(1,898)	(1,752)
Dividends Paid on Common Stock – Nonaffiliated	(108)	(6)	(8)
Other Financing Activities	(8)	(50)	(80)
Net Cash Flows from Financing Activities	5,017	659	1,077
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	22	(133)	(178)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	246	379	557
Cash, Cash Equivalents and Restricted Cash at End of Period	268	246	379
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	1,894	1,838	1,674
Noncash Acquisitions Under Finance Leases	44	30	49
Construction Expenditures Included in Current Liabilities as of December 31,	1,935	1,312	842
SOUTHWESTERN ELECTRIC POWER COMPANY
OPERATING ACTIVITIES
Net Income	391	326	224
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	429	389	343
Deferred Income Taxes	82	(74)	54
Asset Impairments and Other Related Charges	6	0	86
Allowance for Equity Funds Used During Construction	(23)	(14)	(11)
Mark-to-Market of Risk Management Contracts	(8)	(20)	19
Deferred Fuel Over/Under-Recovery, Net	104	156	184
Provision for Refund – Turk Plant	0	79	0
Change in Other Noncurrent Assets	(36)	(69)	(102)
Change in Other Noncurrent Liabilities	(125)	(41)	11
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(66)	(3)	20
Fuel, Materials and Supplies	(3)	29	(31)
Accounts Payable	77	3	(8)
Accrued Taxes, Net	28	(8)	(5)
Provision for Refund – Turk Plant	0	68	0
Other Current Assets	7	10	20
Other Current Liabilities	12	(14)	(1)
Net Cash Flows from Operating Activities	875	817	803
INVESTING ACTIVITIES
Construction Expenditures	(935)	(741)	(781)
Change in Advances to Affiliates, Net	(21)	0	0
Acquisitions of Generation Facilities	(1,229)	(399)	0
Other Investing Activities	14	11	4
Net Cash Flows Used for Investing Activities	(2,171)	(1,129)	(777)
FINANCING ACTIVITIES
Capital Contribution from Parent	601	59	50
Return of Capital to Parent	0	(1)	0
Change in Short-term Debt – Nonaffiliated	(3)	1	4
Change in Advances from Affiliates, Net	(275)	186	(222)
Retirement of Long-term Debt	(11)	0	(94)
Principal Payments for Finance Lease Obligations	(4)	(14)	(19)
Dividends Paid on Common Stock	0	(250)	(175)
Dividends Paid on Common Stock – Nonaffiliated	(3)	(5)	(5)
Other Financing Activities	3	2	2
Net Cash Flows from Financing Activities	1,308	314	(112)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	12	2	(86)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	5	3	89
Cash, Cash Equivalents and Restricted Cash at End of Period	17	5	3
SUPPLEMENTARY INFORMATION
Cash Paid for Interest, Net of Capitalized Amounts	156	139	129
Noncash Acquisitions Under Finance Leases	3	2	7
Construction Expenditures Included in Current Liabilities as of December 31,	225	137	64
SOUTHWESTERN ELECTRIC POWER COMPANY | Nonrelated Party
FINANCING ACTIVITIES
Issuance of Long-term Debt	0	336	347
SOUTHWESTERN ELECTRIC POWER COMPANY | Affiliated Entity
FINANCING ACTIVITIES
Issuance of Long-term Debt	$ 1,000	$ 0	$ 0