XML 144 R75.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Related Party Transactions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Related Party Charitable Contributions to AEP Foundation |  | $ 75.0 |
Revenue from Contract with Customers | $ 18,982.3 | 19,639.5 | $ 16,792.0
AEP Texas Inc. [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 9.9 |
Billings from ETT for ERCOT Wholesale Transmission Services | 28.7 | 28.5 | 28.0
Revenue from Contract with Customers | 1,906.1 | 1,848.0 | 1,587.7
Revenue from Related Parties, Net | 4.9 | 3.5 | 3.9
AEP Texas Inc. [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
AEP Texas Inc. [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
AEP Texas Inc. [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
AEP Texas Inc. [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
AEP Texas Inc. [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 4.9 | 3.5 | 3.9
AEP Transmission Co [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 11.1 |
Revenue from Contract with Customers | 1,720.6 | 1,651.7 | 1,410.9
Revenue from Related Parties, Net | 1,317.8 | 1,283.8 | 1,153.9
AEP Transmission Co [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
AEP Transmission Co [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
AEP Transmission Co [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 1,304.0 | 1,276.4 | 1,136.1
AEP Transmission Co [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
AEP Transmission Co [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 13.8 | 7.4 | 17.8
Appalachian Power Co [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 12.5 |
Expenses from Barging, Urea Transloading and Other Services | 39.2 | 36.1 | 40.1
PJM Net Transmission Service Charges | 365.1 | 345.1 | 302.0
Revenue from Contract with Customers | 3,740.6 | 3,520.7 | 3,092.9
Revenue from Related Parties, Net | 239.3 | 256.1 | 197.9
Appalachian Power Co [Member] | Related Party |  |  |
Revenue from Contract with Customers | 239.3 | 256.1 | 197.9
Appalachian Power Co [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 158.7 | 169.7 | 128.6
Appalachian Power Co [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
Appalachian Power Co [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 70.9 | 77.5 | 60.3
Appalachian Power Co [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Appalachian Power Co [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 9.7 | 8.9 | 9.0
Indiana Michigan Power Co [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 11.0 |
PJM Net Transmission Service Charges | 226.2 | 220.8 | 186.7
Revenue from Contract with Customers | 2,522.3 | 2,659.7 | 2,330.7
Revenue from Related Parties, Net | 57.8 | 69.6 | 57.8
Indiana Michigan Power Co [Member] | Direct Purchases from AEGCo [Member] |  |  |
Cost of Purchased Power from Affiliate | 181.0 | 242.0 | 218.0
Indiana Michigan Power Co [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Indiana Michigan Power Co [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
Indiana Michigan Power Co [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | (11.1) | 7.7 | (2.5)
Indiana Michigan Power Co [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 59.0 | 54.1 | 54.0
Indiana Michigan Power Co [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 9.9 | 7.8 | 6.3
Indiana Michigan Power Co [Member] | AEP Wind Holdings LLC [Member] | Generation and Marketing [Member] |  |  |
Cost of Purchased Power from Affiliate | 8.0 | 11.8 | 9.9
Ohio Power Co [Member] |  |  |
Cost of Purchased Power from Affiliate | 86.8 | 9.8 | 51.9
Related Party Charitable Contributions to AEP Foundation |  | 8.1 |
PJM Net Transmission Service Charges | 665.3 | 608.2 | 508.9
Revenue from Contract with Customers | 3,802.8 | 3,672.1 | 2,837.5
Revenue from Related Parties, Net | 31.1 | 18.8 | 24.8
Ohio Power Co [Member] | Ohio Auction SSO Load Delivery Purchases from Affiliates [Member] |  |  |
Cost of Purchased Power from Affiliate | 87.0 | 10.0 | 52.0
Ohio Power Co [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Ohio Power Co [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
Ohio Power Co [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 3.2 | (3.6) | (1.1)
Ohio Power Co [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Ohio Power Co [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 27.9 | 22.4 | 25.9
Ohio Power Co [Member] | AEP Wind Holdings LLC [Member] | Generation and Marketing [Member] |  |  |
Cost of Purchased Power from Affiliate | 16.1 | 23.6 | 19.6
Public Service Co Of Oklahoma [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 5.8 |
SPP Net Transmission Service Charges | 100.1 | 110.8 | 94.7
Revenue from Contract with Customers | 1,976.6 | 1,875.7 | 1,474.3
Revenue from Related Parties, Net | 1.2 | 2.9 | 4.2
Public Service Co Of Oklahoma [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Public Service Co Of Oklahoma [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 0.0 |
Public Service Co Of Oklahoma [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Public Service Co Of Oklahoma [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Public Service Co Of Oklahoma [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 1.2 | 2.9 | 4.2
Southwestern Electric Power Co [Member] |  |  |
Related Party Charitable Contributions to AEP Foundation |  | 8.8 |
SPP Net Transmission Service Charges | 49.2 | 62.1 | 56.2
Revenue from Contract with Customers | 2,192.1 | 2,283.2 | 2,126.0
Revenue from Related Parties, Net | 46.8 | 53.9 | 41.0
Southwestern Electric Power Co [Member] | Related Party |  |  |
Revenue from Contract with Customers | 81.6 | 59.5 | 41.4
Southwestern Electric Power Co [Member] | Direct Sales to East Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Southwestern Electric Power Co [Member] | Direct Sales to West Affiliates [Member] | Related Party |  |  |
Revenue from Contract with Customers |  | 1.3 |
Southwestern Electric Power Co [Member] | Transmission Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 45.3 | 51.5 | 39.6
Southwestern Electric Power Co [Member] | Barging, Urea Transloading and Other Transportation Services Revenues Affiliated | Related Party |  |  |
Revenue from Contract with Customers | 0.0 | 0.0 | 0.0
Southwestern Electric Power Co [Member] | Other Revenues [Member] | Related Party |  |  |
Revenue from Contract with Customers | 1.5 | 1.1 | 1.4
Southwestern Electric Power Co [Member] | AEP Wind Holdings LLC [Member] | Generation and Marketing [Member] |  |  |
Cost of Purchased Power from Affiliate | 0.0 | 13.7 | 14.5
AEP Generating Co [Member] |  |  |
Expenses from Barging, Urea Transloading and Other Services | 9.3 | 11.3 | 7.6
Kentucky Power Co [Member] |  |  |
Expenses from Barging, Urea Transloading and Other Services | 0.0 | 2.0 | 3.1
Wheeling Power Co [Member] [Domain] |  |  |
Expenses from Barging, Urea Transloading and Other Services | $ 10.6 | $ 4.7 | $ 3.2

X
- Definition Billings from ETT for ERCOT Wholesale Transmission Services + References No definition available. + Details
Name: | aep_BillingsfromETTforERCOTWholesaleTransmissionServices
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cost of electricity purchased as well as fuel used to generate electricity used in operations and sold during the reporting period from affiliate. + References No definition available. + Details
Name: | aep_CostOfPurchasedPowerFromAffiliate
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expenses from barging, urea transloading and other services provided by I&M. + References No definition available. + Details
Name: | aep_ExpensesFromBargingUreaTransloadingAndOtherServices
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition PJM Net Transmission Service Charges + References No definition available. + Details
Name: | aep_PJMNetTransmissionServiceCharges
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Related Party Charitable Contribuions to AEP Foundation + References No definition available. + Details
Name: | aep_RelatedPartyCharitableContribuionstoAEPFoundation
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of revenue, fees and commissions earned from transactions, net of provision for refunds between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. + References No definition available. + Details
Name: | aep_RevenuefromRelatedPartiesNet
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition SPP Net Transmission Service Charges + References No definition available. + Details
Name: | aep_SPPNetTransmissionServiceCharges
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-30 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | aep_TypesOfRelatedPartyRevenueAxis=aep_DirectSalesToEastAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=us-gaap_RelatedPartyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_TypesOfRelatedPartyRevenueAxis=aep_DirectSalesToWestAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_TypesOfRelatedPartyRevenueAxis=aep_TransmissionRevenuesAffiliatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_TypesOfRelatedPartyRevenueAxis=aep_BargingUreaTransloadingAndOtherTransportationServicesRevenuesAffiliatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_TypesOfRelatedPartyRevenueAxis=aep_OtherRevenuesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

X
- Details
Name: | aep_TypesOfRelatedPartyPurchasesAxis=aep_PurchasesFromAegcoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=aep_AEPWindHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=aep_GenerationAndMarketingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | aep_TypesOfRelatedPartyPurchasesAxis=aep_OhioAuctionSSOLoadDeliveryPurchasesFromAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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