CONDENSED CONSOLIDATED BALANCE SHEETS - SWEPCo (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Restricted Cash	$ 39.1	$ 43.1
Materials and Supplies	986.7	966.2
Other Property, Plant and Equipment	8,385.1	7,491.6
Accumulated Depreciation and Amortization	27,871.8	26,186.4
Securitized Assets	952.9	554.3
Long-term Debt Due Within One Year	1,898.6	3,335.0
Long-term Debt	$ 44,239.0	$ 39,307.8
Common Stock – Par Value (in dollars per share)	$ 6.50	$ 6.50
Common Stock – Shares Authorized (in shares)	600,000,000	600,000,000
Subsidiaries
Restricted Cash	$ 39.1	$ 43.1
Long-term Debt Due Within One Year	178.8	216.5
Long-term Debt	1,295.7	826.5
SWEPCo
Restricted Cash	7.8	3.4
Materials and Supplies	85.0	81.4
Other Property, Plant and Equipment	909.5	940.4
Accumulated Depreciation and Amortization	3,443.6	3,280.0
Securitized Assets	319.5	331.4
Long-term Debt Due Within One Year	516.6	22.7
Long-term Debt	$ 3,456.0	$ 3,958.1
Common Stock – Par Value (in dollars per share)	$ 18	$ 18
Common Stock – Shares Authorized (in shares)	3,680	3,680
Common Stock – Shares Outstanding (in shares)	3,680	3,680
SWEPCo | Subsidiaries
Restricted Cash	$ 7.8	$ 3.4
Securitized Assets	319.5	331.4
Long-term Debt Due Within One Year	16.6	22.7
Long-term Debt	304.3	308.7
SWEPCo | Sabine
Materials and Supplies	1.1	1.5
Other Property, Plant and Equipment	125.2	166.8
Accumulated Depreciation and Amortization	$ 125.2	$ 166.8