Approved Carrying Charges

No definition available.

Name:	aeptexas_ApprovedCarryingCharges
Namespace Prefix:	aeptexas_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Approved Carrying Charges, Recovery Period

+ References

No definition available.

+ Details

Name:	aeptexas_ApprovedCarryingChargesRecoveryPeriod
Namespace Prefix:	aeptexas_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase (Decrease) In Under-Recovered Costs Disallowance

+ References

No definition available.

+ Details

Name:	aeptexas_IncreaseDecreaseInUnderRecoveredCostsDisallowance
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Public Utilities, Approved Annual Inflation Based Rate Adjustment

+ References

No definition available.

+ Details

Name:	aeptexas_PublicUtilitiesApprovedAnnualInflationBasedRateAdjustment
Namespace Prefix:	aeptexas_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public utilities, Approved Recovery Under-Recovered Costs

+ References

No definition available.

+ Details

Name:	aeptexas_PublicUtilitiesApprovedRecoveryUnderRecoveredCosts
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Public Utilities, Requested Rate Increase (Decrease) To Customers

+ References

No definition available.

+ Details

Name:	aeptexas_PublicUtilitiesRequestedRateIncreaseDecreaseToCustomers
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Surcharge Duration

+ References

No definition available.

+ Details

Name:	aeptexas_PublicUtilitiesSurchargeDuration
Namespace Prefix:	aeptexas_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Under-Recovered Costs Disallowance

+ References

No definition available.

+ Details

Name:	aeptexas_PublicUtilitiesUnderRecoveredCostsDisallowance
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Regulatory Asset, Approved To Be Financed Through Securitization

+ References

No definition available.

+ Details

Name:	aeptexas_RegulatoryAssetApprovedToBeFinancedThroughSecuritization
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Regulatory Asset, Requested To Be Financed Through Securitization

+ References

No definition available.

+ Details

Name:	aeptexas_RegulatoryAssetRequestedToBeFinancedThroughSecuritization
Namespace Prefix:	aeptexas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Regulatory Asset, Requested To Be Financed Through Securitization Period

+ References

No definition available.

+ Details

Name:	aeptexas_RegulatoryAssetRequestedToBeFinancedThroughSecuritizationPeriod
Namespace Prefix:	aeptexas_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- 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

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

Name:	us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
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

Name:	us-gaap_PublicUtilitiesRequestedDebtCapitalStructurePercentage
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

Name:	us-gaap_PublicUtilitiesRequestedEquityCapitalStructurePercentage
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

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

- Details

Name:	dei_LegalEntityAxis=aeptexas_AppalachianPowerCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=aeptexas_UnderRecoveryENECBalanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=aeptexas_JurisdictionalPlantBalancesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=us-gaap_StormCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=aeptexas_UpfrontFinancingCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatutoryAccountingPracticesByJurisdictionAxis=stpr_VA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=aeptexas_APCoPortionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=aeptexas_AmosAndMountaineerPlantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	aeptexas_BaseRateAxis=aeptexas_ENECFilingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=aeptexas_A8312026UnderRecoveryENECBalanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAssetAxis=aeptexas_A8312026UnderRecoveryMRBCBalanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	aeptexas_BaseRateAxis=aeptexas_A2024WestVirginiaBaseRateCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	aeptexas_BaseRateAxis=aeptexas_WestVirginiaModifiedRateBaseCostMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	aeptexas_BaseRateAxis=aeptexas_WestVirginiaInflationBasedRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=aeptexas_ResidentialAndCommercialCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=aeptexas_IndustrialCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	aeptexas_BaseRateAxis=aeptexas_A2026VirginiaBaseRateCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RATE MATTERS - APCo and WPCo Rate Matters (Details) - APPALACHIAN POWER COMPANY - USD ($) $ in Millions	1 Months Ended
	May 31, 2026	Apr. 30, 2026	Feb. 28, 2026	Sep. 30, 2025	Mar. 31, 2024	Jan. 31, 2024	Jul. 30, 2026	Jun. 30, 2026	Aug. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Feb. 29, 2024
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								$ 2,708
ENEC Under-Recovery Regulatory Assets
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								593
Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								1,704
Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								158
Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								16
VIRGINIA
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization	$ 1,400
Regulatory asset, requested to be financed through securitization (in years)	20 years
VIRGINIA \| Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization	$ 141
VIRGINIA \| Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization	11
APCo Portion
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								1,672
APCo Portion \| ENEC Under-Recovery Regulatory Assets
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								274
APCo Portion \| Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022)
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								1,145
APCo Portion \| Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								155
APCo Portion \| Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization								10
Amos and Mountaineer Plants \| 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	1,200
ENEC Filing
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance						$ 232			$ 232		$ 232	$ 232
Approved recovery under recovered costs						$ 321
Approved carrying charges						4.00%
Approved carrying charges, recovery period						10 years
Reduction of under-recovered costs disallowance										$ 179
ENEC Filing \| ENEC Under-Recovery Regulatory Assets
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization		$ 21
ENEC Filing \| ENEC Under-Recovery Regulatory Assets \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							$ 2,700
ENEC Filing \| 8/31/2026 Under-Recovery ENEC Balance
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization		597						594
ENEC Filing \| 8/31/2026 Under-Recovery ENEC Balance \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							593
ENEC Filing \| 8/31/2026 Under-Recovery MRBC Balance \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							34
ENEC Filing \| APCo Portion
Public Utilities, General Disclosures [Line Items]
Under recovered costs disallowance						$ 136
Approved recovery under recovered costs						$ 174
ENEC Filing \| APCo Portion \| ENEC Under-Recovery Regulatory Assets \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							1,700
ENEC Filing \| APCo Portion \| 8/31/2026 Under-Recovery ENEC Balance
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization		$ 285						$ 275
ENEC Filing \| APCo Portion \| 8/31/2026 Under-Recovery ENEC Balance \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							274
ENEC Filing \| APCo Portion \| 8/31/2026 Under-Recovery MRBC Balance \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization							$ 28
2024 West Virginia Base Rate Case
Public Utilities, General Disclosures [Line Items]
Approved return on equity			9.75%
Approved annual base rate increase			$ 91	$ 76
2024 West Virginia Base Rate Case \| APCo Portion
Public Utilities, General Disclosures [Line Items]
Approved annual base rate increase			$ 79	$ 67
West Virginia Modified Rate Base Cost
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase (decrease)					$ 32
Public utilities, surcharge duration		4 years
West Virginia Inflation-Based Rate
Public Utilities, General Disclosures [Line Items]
Approved annual base rate increase		$ 40
West Virginia Inflation-Based Rate \| Residential And Commercial Customers
Public Utilities, General Disclosures [Line Items]
Approved annual inflation based rate adjustment		4.00%
West Virginia Inflation-Based Rate \| Industrial Customers
Public Utilities, General Disclosures [Line Items]
Approved annual inflation based rate adjustment		2.50%
2026 Virginia Base Rate Case
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase (decrease)	105
2026 Virginia Base Rate Case \| Amos and Mountaineer Plants
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase (decrease)	61
Public utilities, requested rate increase (decrease) to customers	$ 166
Requested return on equity	10.50%
Requested debt capital structure	50.30%
Requested equity capital structure	49.70%