Approved Net Increase in Kentucky Annual Revenues

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Jointly Owned Utility Plant, Proportionate Energy And Capacity Share

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Jointly Owned Utility Plant, Proportionate Ownership Share Requested To Be Transferred

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- Definition

Non-Utility Issuance Costs

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- Definition

Offset For Net Present Value Of Return On ADIT

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- Definition

Public Utilities, Order Entered In Mandated Period

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- Definition

Reduction In Revenue Requirement For Recovery of Actual Test Year PJM Transmission Costs

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- Definition

Regulatory Assets, Estimated Cost to be Recovered

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Regulatory Assets Expected to be Recovered Through Securitization

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Request To Defer Transmission Costs, Amount Denied

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Requested annual increase.

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No definition available.

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Requested Securitization Bonds Regulatory Assets Recovery

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- Definition

Settlement Agreement Annual Increase

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Settlement Agreement Return on Common Equity

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Settlement Agreement Securitization Bonds Regulatory Assets Recovery

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- Definition

The proportionate share of interest (percent) in a jointly owned utility plant.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 360
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 10.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479070/980-360-S99-1

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
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-Publisher FASB
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Percentage of public utility's approved return on equity.

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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.

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Period end amount of total net PPE.

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No definition available.

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Percentage of public utility's requested return on equity.

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No definition available.

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RATE MATTERS - KPCo Rate Matters (Details) - USD ($) $ in Millions	1 Months Ended							6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jan. 31, 2025	Feb. 29, 2024	Jan. 31, 2024	Nov. 30, 2023	Jun. 30, 2023	Jun. 30, 2025	Jul. 31, 2021
Public Utilities, General Disclosures [Line Items]
Total Issuances								$ 3,186.6
KPCo \| Securitization Bonds
Public Utilities, General Disclosures [Line Items]
Total Issuances								$ 477.7
KPCo \| Mitchell Plant
Public Utilities, General Disclosures [Line Items]
Jointly owned utility plant, percentage of ownership share	50.00%							50.00%
Proportionate energy and capacity share	50.00%							50.00%
Net Book Value	$ 535.0							$ 535.0
KPCo \| Mitchell Plant ELG investments
Public Utilities, General Disclosures [Line Items]
Jointly owned utility plant, percentage of ownership share									50.00%
Estimated cost to be recovered	78.0							78.0
KPCo \| Mitchell Plant Non-ELG Capital Investments
Public Utilities, General Disclosures [Line Items]
Estimated cost to be recovered	$ 60.0							$ 60.0
WPCo \| Mitchell Plant
Public Utilities, General Disclosures [Line Items]
Jointly owned utility plant, percentage of ownership share	50.00%							50.00%
WPCo \| Mitchell Plant ELG investments
Public Utilities, General Disclosures [Line Items]
Proportionate ownership share requested to be transferred	50.00%							50.00%
WPCo \| Mitchell Plant Non-ELG Capital Investments
Public Utilities, General Disclosures [Line Items]
Jointly owned utility plant, percentage of ownership share									50.00%
Proportionate ownership share requested to be transferred	50.00%							50.00%
WPCo \| Mitchell Plant ELG investments
Public Utilities, General Disclosures [Line Items]
Subsidiary, ownership percentage, parent									100.00%
2023 Kentucky Base Rate and Securitization Case \| KPCo
Public Utilities, General Disclosures [Line Items]
Requested annual increase							$ 94.0
Requested return on equity							9.90%
Requested securitization bonds regulatory assets recovery							$ 471.0
Settlement agreement annual increase						$ 75.0
Settlement agreement return on common equity						9.75%
Settlement agreement securitization bonds regulatory assets recovery						$ 471.0
Approved net increase in Kentucky annual revenues					$ 60.0
Approved return on equity					9.75%
Reduction in revenue requirement for recovery of actual test year pjm transmission costs			$ 14.0	$ 14.0	$ 14.0
Order entered in mandated period			30 days
Request to defer transmission costs, amount denied		$ 16.0
Regulatory assets expected to be recovered through securitization	$ 500.0							$ 500.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Securitization Bonds
Public Utilities, General Disclosures [Line Items]
Total Issuances	478.0
Non-utility issuance costs	6.0							6.0
Securitized offset for net present value of return on ADIT	29.0							29.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Plant Retirement Costs – Asset Retirement Obligation Costs
Public Utilities, General Disclosures [Line Items]
Regulatory assets expected to be recovered through securitization	311.0							311.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Storm-Related Costs
Public Utilities, General Disclosures [Line Items]
Regulatory assets expected to be recovered through securitization	79.0							79.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Under-Recovered Purchased Power Rider Costs
Public Utilities, General Disclosures [Line Items]
Regulatory assets expected to be recovered through securitization	56.0							56.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Deferred Purchased Power Expenses
Public Utilities, General Disclosures [Line Items]
Regulatory assets expected to be recovered through securitization	51.0							51.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Issuance Expenses
Public Utilities, General Disclosures [Line Items]
Regulatory assets expected to be recovered through securitization	$ 3.0							$ 3.0
2023 Kentucky Base Rate and Securitization Case \| KPCo \| Mitchell Plant
Public Utilities, General Disclosures [Line Items]
Jointly owned utility plant, percentage of ownership share							50.00%