FAIR VALUE MEASUREMENTS - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	$ 264.5	$ 258.5
Risk Management Assets
Risk Management Assets	672.5	499.5
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	4,858.9	4,395.1
Total Assets	5,795.9	5,153.1
Risk Management Liabilities
Total Risk Management Liabilities	309.6	324.4
AEP Texas
Other Temporary Investments and Restricted Cash
Restricted Cash	7.3	23.5
Risk Management Assets
Risk Management Assets	0.1	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	7.4
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
APCo
Other Temporary Investments and Restricted Cash
Restricted Cash	10.8	16.2
Risk Management Assets
Risk Management Assets	94.1	37.1
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	104.9	53.3
Risk Management Liabilities
Total Risk Management Liabilities	2.7	2.2
I&M
Risk Management Assets
Risk Management Assets	10.9	18.4
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	4,858.9	4,395.1
Total Assets	4,869.8	4,413.5
Risk Management Liabilities
Total Risk Management Liabilities	1.0	0.7
OPCo
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	44.3	47.5
PSO
Risk Management Assets
Risk Management Assets	68.1	22.0
Risk Management Liabilities
Total Risk Management Liabilities	17.3	5.8
SWEPCo
Other Temporary Investments and Restricted Cash
Restricted Cash	7.8	3.4
Risk Management Assets
Risk Management Assets	57.8	18.1
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	65.6	21.5
Risk Management Liabilities
Total Risk Management Liabilities	5.4	2.3
Risk Management Commodity Contracts
Risk Management Assets
Risk Management Assets	568.3	374.6
Risk Management Liabilities
Total Risk Management Liabilities	253.8	252.6
Risk Management Commodity Contracts | AEP Texas
Risk Management Assets
Risk Management Assets	0.1
Risk Management Liabilities
Total Risk Management Liabilities		0.0
Risk Management Commodity Contracts | APCo
Risk Management Assets
Risk Management Assets	94.1	37.1
Risk Management Liabilities
Total Risk Management Liabilities	2.7	2.2
Risk Management Commodity Contracts | I&M
Risk Management Assets
Risk Management Assets	10.9	18.4
Risk Management Liabilities
Total Risk Management Liabilities	1.0	0.7
Risk Management Commodity Contracts | OPCo
Risk Management Liabilities
Total Risk Management Liabilities	44.3	47.5
Risk Management Commodity Contracts | PSO
Risk Management Assets
Risk Management Assets	68.1	22.0
Risk Management Liabilities
Total Risk Management Liabilities	17.3	5.8
Risk Management Commodity Contracts | SWEPCo
Risk Management Assets
Risk Management Assets	57.8	18.1
Risk Management Liabilities
Total Risk Management Liabilities	5.4	2.3
Commodity Hedges
Risk Management Assets
Risk Management Assets	104.2	124.9
Risk Management Liabilities
Total Risk Management Liabilities	6.9	0.2
Fair Value Hedges
Risk Management Liabilities
Total Risk Management Liabilities	48.9	71.6
Other
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	25.4	13.9
Risk Management Assets
Total Risk Management Assets	(531.8)	(529.8)
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	14.3	13.7
Total Assets	(492.1)	(502.2)
Risk Management Liabilities
Total Risk Management Liabilities	(467.3)	(446.2)
Other | AEP Texas
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	0.0
Other | APCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	(2.6)	(4.6)
Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	14.3	13.7
Total Assets		5.3
Total Assets	5.4
Other | SWEPCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	(1.9)	(1.0)
Other | Risk Management Commodity Contracts
Risk Management Assets
Total Risk Management Assets	(517.0)	(517.2)
Risk Management Liabilities
Total Risk Management Liabilities	(452.5)	(433.6)
Other | Risk Management Commodity Contracts | AEP Texas
Risk Management Assets
Risk Management Assets	0.0
Risk Management Liabilities
Total Risk Management Liabilities		(0.3)
Other | Risk Management Commodity Contracts | APCo
Risk Management Assets
Total Risk Management Assets	(2.6)	(4.6)
Risk Management Liabilities
Total Risk Management Liabilities	(2.6)	(4.7)
Other | Risk Management Commodity Contracts | I&M
Risk Management Assets
Total Risk Management Assets	(8.9)	(8.4)
Risk Management Liabilities
Total Risk Management Liabilities	(11.2)	(9.0)
Other | Risk Management Commodity Contracts | OPCo
Risk Management Liabilities
Total Risk Management Liabilities	0.0	(0.2)
Other | Risk Management Commodity Contracts | PSO
Risk Management Assets
Total Risk Management Assets	(0.5)	(1.9)
Risk Management Liabilities
Total Risk Management Liabilities	(0.5)	(2.0)
Other | Risk Management Commodity Contracts | SWEPCo
Risk Management Assets
Total Risk Management Assets	(1.9)	(1.0)
Risk Management Liabilities
Total Risk Management Liabilities	(1.9)	(1.1)
Other | Commodity Hedges
Risk Management Assets
Total Risk Management Assets	(14.8)	(12.6)
Risk Management Liabilities
Total Risk Management Liabilities	(14.8)	(12.6)
Other | Fair Value Hedges
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Restricted Cash
Other Temporary Investments and Restricted Cash
Restricted Cash	39.1	43.1
Restricted Cash | Other
Other Temporary Investments and Restricted Cash
Restricted Cash	13.2	0.0
Other Cash Deposits
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	12.2	13.9
Other Cash Deposits | Other
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	12.2	13.9
Fixed Income Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	171.1	161.9
Fixed Income Securities – Mutual Funds | Other
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Equity Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	42.1	39.6
Equity Securities – Mutual Funds | Other
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Cash and Cash Equivalents
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	25.0	23.3
Cash and Cash Equivalents | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	25.0	23.3
Cash and Cash Equivalents | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	14.3	13.7
Cash and Cash Equivalents | Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	14.3	13.7
United States Government
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,385.1	1,322.8
United States Government | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,385.1	1,322.8
United States Government | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
United States Government | Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Corporate Debt
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	352.9	211.3
Corporate Debt | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	352.9	211.3
Corporate Debt | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Corporate Debt | Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Subtotal Fixed Income Securities
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Subtotal Fixed Income Securities | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Subtotal Fixed Income Securities | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Subtotal Fixed Income Securities | Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Equity Securities - Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,095.9
Equity Securities - Domestic | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0
Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		2,837.7
Domestic | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,095.9	2,837.7
Domestic | Other
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0.0
Domestic | Other | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	239.1	244.6
Risk Management Assets
Risk Management Assets	3.6	2.9
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,106.6	2,847.3
Total Assets	3,349.3	3,094.8
Risk Management Liabilities
Total Risk Management Liabilities	5.3	4.4
Level 1 | Within Current Year
Risk Management Liabilities
Maturities of net fair value of risk management contracts	(1.0)	(1.0)
Level 1 | Maturity Period 2
Risk Management Liabilities
Maturities of net fair value of risk management contracts	(1.0)
Level 1 | AEP Texas
Other Temporary Investments and Restricted Cash
Restricted Cash	7.3	23.5
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	7.3
Level 1 | APCo
Other Temporary Investments and Restricted Cash
Restricted Cash	10.8	16.2
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	10.8	16.2
Level 1 | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,106.6	2,847.3
Total Assets	3,106.6	2,847.3
Level 1 | SWEPCo
Other Temporary Investments and Restricted Cash
Restricted Cash	7.8	3.4
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	7.8	3.4
Level 1 | Risk Management Commodity Contracts
Risk Management Assets
Risk Management Assets	3.6	2.9
Risk Management Liabilities
Total Risk Management Liabilities	5.3	4.4
Level 1 | Risk Management Commodity Contracts | AEP Texas
Risk Management Assets
Risk Management Assets	0.0
Risk Management Liabilities
Total Risk Management Liabilities		0.0
Level 1 | Risk Management Commodity Contracts | APCo
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Risk Management Commodity Contracts | I&M
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Risk Management Commodity Contracts | OPCo
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Risk Management Commodity Contracts | PSO
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Risk Management Commodity Contracts | SWEPCo
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Commodity Hedges
Risk Management Assets
Risk Management Assets	0.0	0.0
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Fair Value Hedges
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 1 | Restricted Cash
Other Temporary Investments and Restricted Cash
Restricted Cash	25.9	43.1
Level 1 | Other Cash Deposits
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 1 | Fixed Income Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	171.1	161.9
Level 1 | Equity Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	42.1	39.6
Level 1 | Cash and Cash Equivalents
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	10.7	9.6
Level 1 | Cash and Cash Equivalents | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	10.7	9.6
Level 1 | United States Government
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | United States Government | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | Corporate Debt
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | Corporate Debt | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | Subtotal Fixed Income Securities
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | Subtotal Fixed Income Securities | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 1 | Equity Securities - Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,095.9
Level 1 | Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		2,837.7
Level 1 | Domestic | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	3,095.9	2,837.7
Level 2
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Risk Management Assets
Risk Management Assets	724.0	712.9
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Total Assets	2,462.0	2,247.0
Risk Management Liabilities
Total Risk Management Liabilities	622.0	618.3
Level 2 | Within Current Year
Risk Management Liabilities
Maturities of net fair value of risk management contracts	2.0	16.0
Level 2 | Maturity Period 2
Risk Management Liabilities
Maturities of net fair value of risk management contracts	63.0	43.0
Level 2 | Maturity Period 3
Risk Management Liabilities
Maturities of net fair value of risk management contracts	6.0	4.0
Level 2 | AEP Texas
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	0.1
Level 2 | APCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	5.3	6.5
Level 2 | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Total Assets	1,746.5	1,554.0
Level 2 | SWEPCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	0.3	1.0
Level 2 | Risk Management Commodity Contracts
Risk Management Assets
Risk Management Assets	623.0	597.3
Risk Management Liabilities
Total Risk Management Liabilities	552.4	534.1
Level 2 | Risk Management Commodity Contracts | AEP Texas
Risk Management Assets
Risk Management Assets	0.1
Risk Management Liabilities
Total Risk Management Liabilities		0.3
Level 2 | Risk Management Commodity Contracts | APCo
Risk Management Assets
Risk Management Assets	5.3	6.5
Risk Management Liabilities
Total Risk Management Liabilities	5.2	6.9
Level 2 | Risk Management Commodity Contracts | I&M
Risk Management Assets
Risk Management Assets	8.5	19.9
Risk Management Liabilities
Total Risk Management Liabilities	11.8	9.2
Level 2 | Risk Management Commodity Contracts | OPCo
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.2
Level 2 | Risk Management Commodity Contracts | PSO
Risk Management Assets
Risk Management Assets	0.3	3.1
Risk Management Liabilities
Total Risk Management Liabilities	14.8	7.0
Level 2 | Risk Management Commodity Contracts | SWEPCo
Risk Management Assets
Risk Management Assets	0.3	1.0
Risk Management Liabilities
Total Risk Management Liabilities	4.5	2.8
Level 2 | Commodity Hedges
Risk Management Assets
Risk Management Assets	101.0	115.6
Risk Management Liabilities
Total Risk Management Liabilities	20.7	12.6
Level 2 | Fair Value Hedges
Risk Management Liabilities
Total Risk Management Liabilities	48.9	71.6
Level 2 | Restricted Cash
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Level 2 | Other Cash Deposits
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 2 | Fixed Income Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 2 | Equity Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 2 | Cash and Cash Equivalents
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 2 | Cash and Cash Equivalents | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 2 | United States Government
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,385.1	1,322.8
Level 2 | United States Government | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,385.1	1,322.8
Level 2 | Corporate Debt
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	352.9	211.3
Level 2 | Corporate Debt | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	352.9	211.3
Level 2 | Subtotal Fixed Income Securities
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Level 2 | Subtotal Fixed Income Securities | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	1,738.0	1,534.1
Level 2 | Equity Securities - Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0
Level 2 | Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0.0
Level 2 | Domestic | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Risk Management Assets
Risk Management Assets	476.7	313.5
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Total Assets	476.7	313.5
Risk Management Liabilities
Total Risk Management Liabilities	149.6	147.9
Level 3 | Within Current Year
Risk Management Liabilities
Maturities of net fair value of risk management contracts	95.0	106.0
Level 3 | Maturity Period 2
Risk Management Liabilities
Maturities of net fair value of risk management contracts	222.0	45.0
Level 3 | Maturity Period 3
Risk Management Liabilities
Maturities of net fair value of risk management contracts	15.0	9.0
Level 3 | Maturity Period Four
Risk Management Liabilities
Maturities of net fair value of risk management contracts	(22.0)	(16.0)
Level 3 | AEP Texas
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	0.0
Level 3 | APCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	91.4	35.2
Level 3 | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Total Assets	11.3	6.9
Level 3 | SWEPCo
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Spent Nuclear Fuel and Decommissioning Trusts
Total Assets	59.4	18.1
Level 3 | Risk Management Commodity Contracts
Risk Management Assets
Risk Management Assets	458.7	291.6
Risk Management Liabilities
Total Risk Management Liabilities	148.6	147.7
Level 3 | Risk Management Commodity Contracts | AEP Texas
Risk Management Assets
Risk Management Assets	0.0
Risk Management Liabilities
Total Risk Management Liabilities		0.0
Level 3 | Risk Management Commodity Contracts | APCo
Risk Management Assets
Risk Management Assets	91.4	35.2
Risk Management Liabilities
Total Risk Management Liabilities	0.1	0.0
Level 3 | Risk Management Commodity Contracts | I&M
Risk Management Assets
Risk Management Assets	11.3	6.9
Risk Management Liabilities
Total Risk Management Liabilities	0.4	0.5
Level 3 | Risk Management Commodity Contracts | OPCo
Risk Management Liabilities
Total Risk Management Liabilities	44.3	47.5
Level 3 | Risk Management Commodity Contracts | PSO
Risk Management Assets
Risk Management Assets	68.3	20.8
Risk Management Liabilities
Total Risk Management Liabilities	3.0	0.8
Level 3 | Risk Management Commodity Contracts | SWEPCo
Risk Management Assets
Risk Management Assets	59.4	18.1
Risk Management Liabilities
Total Risk Management Liabilities	2.8	0.6
Level 3 | Commodity Hedges
Risk Management Assets
Risk Management Assets	18.0	21.9
Risk Management Liabilities
Total Risk Management Liabilities	1.0	0.2
Level 3 | Fair Value Hedges
Risk Management Liabilities
Total Risk Management Liabilities	0.0	0.0
Level 3 | Restricted Cash
Other Temporary Investments and Restricted Cash
Restricted Cash	0.0	0.0
Level 3 | Other Cash Deposits
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 3 | Fixed Income Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 3 | Equity Securities – Mutual Funds
Other Temporary Investments and Restricted Cash
Total Other Temporary Investments and Restricted Cash	0.0	0.0
Level 3 | Cash and Cash Equivalents
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Cash and Cash Equivalents | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | United States Government
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | United States Government | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Corporate Debt
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Corporate Debt | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Subtotal Fixed Income Securities
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Subtotal Fixed Income Securities | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0	0.0
Level 3 | Equity Securities - Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	0.0
Level 3 | Domestic
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts		0.0
Level 3 | Domestic | I&M
Spent Nuclear Fuel and Decommissioning Trusts
Spent Nuclear Fuel and Decommissioning Trusts	$ 0.0	$ 0.0