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- Definition

Approved Carrying Charges, Recovery Period

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- Definition

Increase (Decrease) In Under-Recovered Costs Disallowance

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- Definition

Public Utilities, Approved Annual Inflation Based Rate Adjustment

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- Definition

Public Utilities, Approved Recovery Of Deferred Costs

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- Definition

Public utilities, Approved Recovery Under-Recovered Costs

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- Definition

Public Utilities, Asset Retirement Obligation Costs Recommended To Be Recovered

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No definition available.

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- Definition

Public Utilities, Deferral Of Ancillary Costs, Band

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No definition available.

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- Definition

Public Utilities, Denied Recovery Of Regulatory Asset

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No definition available.

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- Definition

Public Utilities, Removed Vegetation Management Costs From Base Rates

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No definition available.

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- Definition

Public Utilities, Requested Rate Increase (Decrease) To Customers

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No definition available.

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- Definition

Public Utilities, Surcharge Duration

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No definition available.

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- Definition

Public Utilities, Under-Recovered Costs Disallowance

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No definition available.

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- Definition

Regulatory Asset, Approved To Be Financed Through Securitization

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No definition available.

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- Definition

Regulatory Asset, Requested To Be Financed Through Securitization

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No definition available.

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- Definition

Regulatory Asset, Requested To Be Financed Through Securitization Period

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No definition available.

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- Definition

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

+ References

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

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- 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.

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

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RATE MATTERS - APCo and WPCo Rate Matters (Details) - APPALACHIAN POWER COMPANY - USD ($) $ in Millions	1 Months Ended
	Oct. 28, 2026	Sep. 30, 2026	Aug. 31, 2026	May 31, 2026	Apr. 30, 2026	Feb. 28, 2026	Sep. 30, 2025	Mar. 31, 2024	Jan. 31, 2024	Jul. 31, 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
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
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
Storm-Related Costs \| Virginia
Public Utilities, General Disclosures [Line Items]
Regulatory asset, requested to be financed through securitization				$ 141
Upfront Financing Costs
Public Utilities, General Disclosures [Line Items]
Regulatory asset, approved to be financed through securitization		16
Upfront Financing Costs \| Virginia
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 \| Undepreciated Utility Plant Balances of Amos, Mitchell and Mountaineer (as of December 31, 2022) \| Virginia
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				9	$ 21
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
Regulatory asset, approved to be financed through securitization			$ 9							593
ENEC Filing \| 8/31/2026 Under-Recovery MRBC Balance
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
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
Regulatory asset, approved to be financed through securitization										274
ENEC Filing \| APCo Portion \| 8/31/2026 Under-Recovery MRBC Balance
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)		$ 6	$ 1	105
Requested return on equity		9.65%	9.325%
Denied recovery of regulatory asset			$ 9
Removed vegetation management costs from base rates		$ 37
2026 Virginia Base Rate Case \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved return on equity	9.80%
Approved debt capital structure	50.20%
Approved equity capital structure	49.80%
Approved recovery of deferred costs	$ 8
Deferral of ancillary costs, band	11
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%
2026 Virginia Base Rate Case, Rebuttal Testimony
Public Utilities, General Disclosures [Line Items]
Requested annual base rate increase (decrease)		16
Removed vegetation management costs from base rates		37
Asset retirement obligation costs recommended to be recovered		$ 12
2026 Virginia Base Rate Case, First Year \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved annual base rate increase	4
2026 Virginia Base Rate Case, Second Year \| Subsequent Event
Public Utilities, General Disclosures [Line Items]
Approved annual base rate increase	$ 0