XML 166 R125.htm IDEA: XBRL DOCUMENT
v3.25.3

DERIVATIVES AND HEDGING - Schedule of Location and Fair Value of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative [Line Items] |  |
Total Assets | $ 1,218.7 | $ 1,039.1
Total Liabilities | 791.3 | 780.4
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 427.4 | 258.7
Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 708.6 | 479.1
Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 510.1 | 560.0
Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 403.9 | 351.7
Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 387.4 | 428.7
AEP Texas |  |
Derivative [Line Items] |  |
Total Assets | 0.1 | 0.0
Total Liabilities | 0.0 | 0.3
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 0.1 | (0.3)
AEP Texas | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.1 | 0.0
AEP Texas | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
AEP Texas | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.3
AEP Texas | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
APCo |  |
Derivative [Line Items] |  |
Total Assets | 96.9 | 42.2
Total Liabilities | 5.5 | 7.4
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 91.4 | 34.8
APCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 94.4 | 40.2
APCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 2.5 | 2.0
APCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 5.0 | 6.6
APCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.5 | 0.8
I&M |  |
Derivative [Line Items] |  |
Total Assets | 21.0 | 29.7
Total Liabilities | 13.4 | 12.6
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 7.6 | 17.1
I&M | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 19.6 | 28.5
I&M | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 1.4 | 1.2
I&M | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 11.8 | 10.5
I&M | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.6 | 2.1
OPCo |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Total Liabilities | 44.3 | 47.7
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | (44.3) | (47.7)
OPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
OPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
OPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 6.3 | 7.5
OPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 38.0 | 40.2
PSO |  |
Derivative [Line Items] |  |
Total Assets | 68.6 | 23.9
Total Liabilities | 17.8 | 7.8
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 50.8 | 16.1
PSO | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 68.6 | 22.3
PSO | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 1.6
PSO | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 16.4 | 7.6
PSO | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.4 | 0.2
SWEPCo |  |
Derivative [Line Items] |  |
Total Assets | 59.8 | 19.1
Total Liabilities | 7.4 | 3.4
Total MTM Derivative Contract Net Assets (Liabilities) Recognized | 52.4 | 15.7
SWEPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 59.6 | 19.1
SWEPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.2 | 0.0
SWEPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 6.2 | 3.4
SWEPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.2 | 0.0
Commodity | Not Designated as Hedging Instrument | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 654.2 | 425.0
Commodity | Not Designated as Hedging Instrument | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 445.0 | 475.4
Commodity | Not Designated as Hedging Instrument | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 360.8 | 304.1
Commodity | Not Designated as Hedging Instrument | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 359.3 | 390.7
Commodity | Not Designated as Hedging Instrument | AEP Texas | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.1 | 0.0
Commodity | Not Designated as Hedging Instrument | AEP Texas | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Not Designated as Hedging Instrument | AEP Texas | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.3
Commodity | Not Designated as Hedging Instrument | AEP Texas | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Not Designated as Hedging Instrument | APCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 94.4 | 40.2
Commodity | Not Designated as Hedging Instrument | APCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 2.5 | 2.0
Commodity | Not Designated as Hedging Instrument | APCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 5.0 | 6.6
Commodity | Not Designated as Hedging Instrument | APCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.5 | 0.8
Commodity | Not Designated as Hedging Instrument | I&M | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 19.6 | 28.5
Commodity | Not Designated as Hedging Instrument | I&M | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 1.4 | 1.2
Commodity | Not Designated as Hedging Instrument | I&M | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 11.8 | 10.5
Commodity | Not Designated as Hedging Instrument | I&M | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.6 | 2.1
Commodity | Not Designated as Hedging Instrument | OPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Not Designated as Hedging Instrument | OPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Not Designated as Hedging Instrument | OPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 6.3 | 7.5
Commodity | Not Designated as Hedging Instrument | OPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 38.0 | 40.2
Commodity | Not Designated as Hedging Instrument | PSO | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 68.6 | 22.3
Commodity | Not Designated as Hedging Instrument | PSO | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 1.6
Commodity | Not Designated as Hedging Instrument | PSO | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 16.4 | 7.6
Commodity | Not Designated as Hedging Instrument | PSO | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.4 | 0.2
Commodity | Not Designated as Hedging Instrument | SWEPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 59.6 | 19.1
Commodity | Not Designated as Hedging Instrument | SWEPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.2 | 0.0
Commodity | Not Designated as Hedging Instrument | SWEPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 6.2 | 3.4
Commodity | Not Designated as Hedging Instrument | SWEPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 1.2 | 0.0
Commodity | Designated as Hedging Instrument | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 54.4 | 54.1
Commodity | Designated as Hedging Instrument | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 65.1 | 84.6
Commodity | Designated as Hedging Instrument | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 15.7 | 11.3
Commodity | Designated as Hedging Instrument | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 6.5 | 2.7
Commodity | Designated as Hedging Instrument | AEP Texas | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | AEP Texas | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | AEP Texas | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | AEP Texas | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | APCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | APCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | APCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | APCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | I&M | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | I&M | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | I&M | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | I&M | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | OPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | OPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | OPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | OPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | PSO | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | PSO | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | PSO | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | PSO | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | SWEPCo | Current Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | SWEPCo | Long-term Risk Management Assets |  |
Derivative [Line Items] |  |
Total Assets | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | SWEPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Commodity | Designated as Hedging Instrument | SWEPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 27.4 | 36.3
Interest Rate (USD) | Designated as Hedging Instrument | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 21.6 | 35.3
Interest Rate (USD) | Designated as Hedging Instrument | AEP Texas | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | AEP Texas | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | APCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | APCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | I&M | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | I&M | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | OPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | OPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | PSO | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | PSO | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | SWEPCo | Current Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | 0.0 | 0.0
Interest Rate (USD) | Designated as Hedging Instrument | SWEPCo | Long-term Risk Management Liabilities |  |
Derivative [Line Items] |  |
Total Liabilities | $ 0.0 | $ 0.0

X
- Definition Derivative Asset (Liability) Net, Subject To Master Netting Arrangement, Before Offset + References No definition available. + Details
Name: | aep_DerivativeAssetLiabilityNetSubjectToMasterNettingArrangementBeforeOffset
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-22 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-21 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (c)(2) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4D + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-22 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 21 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-21 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (c)(2) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4D + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_AppalachianPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_OhioPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCompanyOfOklahomaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |