XML 282 R211.htm IDEA: XBRL DOCUMENT
v3.25.0.1

FINANCING ACTIVITIES - Schedule of Interest Expense Incurred For Funds Borrowed from Utility Money Pool (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Short-Term Debt [Line Items] |  |  |
Interest Expense | $ 1,862.8 | $ 1,806.9 | $ 1,396.1
AEP TEXAS INC. |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 257.6 | 232.7 | 208.7
AEP TRANSMISSION COMPANY, LLC |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 214.2 | 194.5 | 162.7
APPALACHIAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 271.4 | 269.6 | 233.9
INDIANA MICHIGAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 133.5 | 136.7 | 125.2
OHIO POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 148.0 | 130.9 | 119.6
PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 95.3 | 103.6 | 83.8
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 105.5 | 147.2 | 137.4
Utility | Related Party | APPALACHIAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 6.1 | 16.8 | 5.6
Utility | Related Party | INDIANA MICHIGAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 4.3 | 3.2 | 2.9
Utility | Related Party | OHIO POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 3.7 | 9.7 | 2.3
Utility | Related Party | PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 8.9 | 2.3 | 5.5
Utility | Nonutility | Related Party | AEP TEXAS INC. |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 6.7 | 10.8 | 0.9
Utility | Nonutility | Related Party | SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | 13.6 | 7.9 | 4.9
Utility | Direct Borrowing | Related Party | AEP TRANSMISSION COMPANY, LLC |  |  |
Short-Term Debt [Line Items] |  |  |
Interest Expense | $ 4.3 | $ 7.6 | $ 3.5

X
- Definition Amount of interest expense classified as nonoperating. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_InterestExpenseNonoperating
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | dei_LegalEntityAxis=aep_AEPTransmissionCompanyLLCMember
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: | aep_MoneyPoolParticipantbyCompanyTypeAxis=aep_UtilityMember
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_MoneyPoolParticipantByCompanyType2Axis=aep_NonutilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aep_MoneyPoolParticipantByCompanyType2Axis=aep_DirectBorrowingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |