- Definition

Separate surcharge that allows up to a 3% annual increase in rates on April 1st for four consecutive years after implementation of base rates.

+ References

No definition available.

+ Details

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- Definition

Annual Increase, April 1st Surcharge, Number Of Consecutive Years

+ References

No definition available.

+ Details

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- Definition

Annual Increase April 1st Surcharge, Proposed Filing Period

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
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Period Type:	duration

- Definition

Approved Carrying Charges

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Approved Carrying Charges, Recovery Period

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Approved Recovery Under-Recovered Costs

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Increase (Decrease) In Under-Recovered Costs Disallowance

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Public Utilities, Average Rate Base

+ References

No definition available.

+ Details

Name:	aep_PublicUtilitiesAverageRateBase
Namespace Prefix:	aep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Under-Recovered Costs Disallowance

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recovery Under-Recovered Costs, Period

+ References

No definition available.

+ Details

Name:	aep_RecoveryUnderRecoveredCostsPeriod
Namespace Prefix:	aep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Regulatory Asset, Recovery Period

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Regulatory Asset, Requested To Be Excluded From Securitization

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Regulatory Asset, Requested To Be Financed Through Securitization

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Regulatory Assets Expected to be Recovered Through Securitization

+ References

No definition available.

+ Details

Name:	aep_RegulatoryAssetsExpectedToBeRecoveredThroughSecuritization
Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Requested annual increase if securitization is authorized.

+ References

No definition available.

+ Details

Name:	aep_RequestedAnnualIncreaseWithoutSecuritization
Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Requested Recovery Under-Recovered Costs

+ References

No definition available.

+ Details

Name:	aep_RequestedRecoveryUnderRecoveredCosts
Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Requested Recovery Under-Recovered Costs, Period

+ References

No definition available.

+ Details

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Namespace Prefix:	aep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of public utility's approved rate increase (decrease) by regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's requested debt to capital, including debt and equity.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's requested equity to capital, including debt and equity.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Balance Type:
Period Type:

- Details

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- Details

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- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
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- Details

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Balance Type:
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- Details

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- Details

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- Details

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Balance Type:
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- Details

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Balance Type:
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- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Balance Type:
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- Details

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- Details

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- Details

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RATE MATTERS - APCo and WPCo Rate Matters (Details) - APCo $ in Millions	1 Months Ended
	May 31, 2025 USD ($)	Apr. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Nov. 30, 2024 USD ($) consecutiveYear	Aug. 31, 2024 USD ($)	Apr. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Jan. 31, 2024 USD ($)	Jul. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jan. 31, 2025 USD ($)	Feb. 29, 2024 USD ($)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										$ 2,395.8
ENEC Under-Recovery Regulatory Assets (as of February 28, 2023)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										321.1
Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										1,704.2
Forecasted Undepreciated CCR and ELG Investments of Amos, Mitchell and Mountaineer (as of November 30, 2024)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										236.8
Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										117.9
Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										15.8
West Virginia
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization			$ 2,400.0
West Virginia \| ENEC Under-Recovery Regulatory Assets (as of February 28, 2023)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization			321.0
Regulatory asset, requested to be excluded from securitization	$ 321.0
West Virginia \| Forecasted Undepreciated CCR and ELG Investments of Amos, Mitchell and Mountaineer (as of November 30, 2024)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization			237.0
West Virginia \| Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization			118.0
Regulatory asset, requested to be excluded from securitization	$ 118.0
Regulatory asset, recovery period	5 years
VIRGINIA \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization									$ 1,400.0
VIRGINIA \| Storm-Related Costs \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization									141.0
APCo Portion
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										1,532.5
APCo Portion \| ENEC Under-Recovery Regulatory Assets (as of February 28, 2023)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										174.3
APCo Portion \| Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										1,145.5
APCo Portion \| Forecasted Undepreciated CCR and ELG Investments of Amos, Mitchell and Mountaineer (as of November 30, 2024)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										87.6
APCo Portion \| Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										115.0
APCo Portion \| Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization										10.1
Mitchell & Mountaineer Plants \| West Virginia \| Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization			1,700.0
Amos and Mountaineer Plants \| VIRGINIA \| Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022) \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization									1,200.0
ENEC Filing
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance			232.0					$ 232.0				$ 232.0
Approved recovery under recovered costs						$ 321.0		$ 321.0
Approved carrying charges						4.00%		4.00%
Approved carrying charges, recovery period						10 years		10 years
Reduction of under-recovered costs disallowance										179.0
Requested annual base rate increase		$ 72.0				$ 58.0
ENEC Filing \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance									$ 19.0
ENEC Filing \| Period ending February 29, 2024
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase						20.0
Approved annual base rate increase			$ 20.0
ENEC Filing \| Period September 2024 through August 2025
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase						$ 38.0
Approved annual base rate increase					$ 38.0
ENEC Filing \| APCo Portion
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance								$ 136.0
Approved recovery under recovered costs								$ 174.0
Virginia Fuel Adjustment Clause
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance		$ 20.0								$ 0.0	$ 20.0
2024 West Virginia Base Rate Case
Public Utilities, General Disclosures [Line Items]
Approved recovery under recovered costs				$ 118.0
Requested annual base rate increase	$ 224.0			$ 251.0
Requested return on equity				10.80%
Requested debt capital structure				52.00%
Requested equity capital structure				48.00%
Requested recovery, under-recovered costs, period		3 years		3 years
Regulatory assets expected to be recovered through securitization				$ 2,400.0
Requested annual increase without securitization				$ 37.0
Annual increase april 1st surcharge				3.00%
Annual increase, surcharges, number of consecutive years \| consecutiveYear				4
Annual increase april 1st surcharge, proposed filing period				4 years
Average rate base		13 months
Requested recovery, under-recovered costs		$ 118.0
Recovery under-recovered costs, period		5 years
2024 West Virginia Base Rate Case \| Minimum
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase	49.0	$ 49.0
Requested return on equity		9.10%
2024 West Virginia Base Rate Case \| Maximum
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase	$ 72.0	$ 91.0
Requested return on equity		9.25%
Modified Rate Base Cost
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase				$ 94.0
Mitchell Base Rate Surcharge
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase				$ 21.0
West Virginia Modified Rate Base Cost
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase							$ 32.0