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Utility Rate Regulation (Regulatory Assets) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | $ 2,092 | $ 2,060
Current Regulatory Assets | 308 | 320
Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 72 | 79
Regulatory Asset Amortization Period | 15 years |
Plant outage costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | $ 23 | 30
Gas Supply Clause [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 10 | 3
Storm Damage Expense rider |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 53 | 68
Storm costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 113 | 113
Transmission Service Charge [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 61 | 44
Other [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 32 | 46
Current Regulatory Assets | 31 | 53
Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 961 | 967
Unamortized loss on debt [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 18 | 20
Terminated interest rate swaps [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 47 | 53
Accumulated cost of removal of utility plant [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 184 | 173
AROs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 263 | 280
Net Metering |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 164 | 147
Environmental Cost Recovery Mechanism |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 102 | 96
Rate adjustment mechanism |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 86 | 95
Renewable Energy Program |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 21 | 14
Gas line Inspections |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 24 | 24
Advanced metering Infrastructure |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 67 | 28
Retired asset recovery |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 76 | 83
TCJA (over/under collection) |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 40 | 21
ISR deferral |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 6 | 22
IT system costs |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 18 | 0
PPL Electric Utilities Corp [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 725 | 673
Current Regulatory Assets | 112 | 133
PPL Electric Utilities Corp [Member] | Plant outage costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Gas Supply Clause [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Storm Damage Expense rider |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 53 | 68
PPL Electric Utilities Corp [Member] | Storm costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 42 | 22
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 27
PPL Electric Utilities Corp [Member] | Other [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 2 | 2
Current Regulatory Assets | 19 | 17
PPL Electric Utilities Corp [Member] | Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 477 | 473
PPL Electric Utilities Corp [Member] | Unamortized loss on debt [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 2 | 3
PPL Electric Utilities Corp [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 184 | 173
PPL Electric Utilities Corp [Member] | AROs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Net Metering |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Environmental Cost Recovery Mechanism |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Rate adjustment mechanism |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Renewable Energy Program |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Gas line Inspections |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Advanced metering Infrastructure |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | Retired asset recovery |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | TCJA (over/under collection) |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 40 | 21
PPL Electric Utilities Corp [Member] | ISR deferral |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
PPL Electric Utilities Corp [Member] | IT system costs |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 18 | 0
Louisville Gas And Electric Co [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 482 | 491
Current Regulatory Assets | 19 | 8
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 41 | 44
Regulatory Asset Amortization Period | 15 years |
Louisville Gas And Electric Co [Member] | Plant outage costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | $ 5 | 7
Louisville Gas And Electric Co [Member] | Gas Supply Clause [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 10 | 3
Louisville Gas And Electric Co [Member] | Storm Damage Expense rider |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Storm costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 24 | 20
Louisville Gas And Electric Co [Member] | Transmission Service Charge [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Other [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 6 | 4
Current Regulatory Assets | 9 | 5
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 212 | 226
Louisville Gas And Electric Co [Member] | Unamortized loss on debt [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 8 | 9
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 28 | 31
Louisville Gas And Electric Co [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | AROs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 73 | 75
Louisville Gas And Electric Co [Member] | Net Metering |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Environmental Cost Recovery Mechanism |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Rate adjustment mechanism |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Renewable Energy Program |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | Gas line Inspections |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 22 | 22
Louisville Gas And Electric Co [Member] | Advanced metering Infrastructure |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 28 | 14
Louisville Gas And Electric Co [Member] | Retired asset recovery |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 76 | 83
Louisville Gas And Electric Co [Member] | TCJA (over/under collection) |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | ISR deferral |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Louisville Gas And Electric Co [Member] | IT system costs |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 467 | 458
Current Regulatory Assets | 1 | 1
Kentucky Utilities Co [Member] | Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 31 | 35
Regulatory Asset Amortization Period | 15 years |
Kentucky Utilities Co [Member] | Plant outage costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | $ 18 | 23
Kentucky Utilities Co [Member] | Gas Supply Clause [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Storm Damage Expense rider |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Storm costs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 38 | 29
Kentucky Utilities Co [Member] | Transmission Service Charge [Member] |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Other [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 11 | 8
Current Regulatory Assets | 1 | 1
Kentucky Utilities Co [Member] | Defined benefit plans [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 144 | 149
Kentucky Utilities Co [Member] | Unamortized loss on debt [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 6 | 6
Kentucky Utilities Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 19 | 22
Kentucky Utilities Co [Member] | Accumulated cost of removal of utility plant [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | AROs [Member] |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 190 | 205
Kentucky Utilities Co [Member] | Net Metering |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Environmental Cost Recovery Mechanism |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Rate adjustment mechanism |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Renewable Energy Program |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | Gas line Inspections |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 2 | 2
Kentucky Utilities Co [Member] | Advanced metering Infrastructure |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 39 | 14
Kentucky Utilities Co [Member] | Retired asset recovery |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | TCJA (over/under collection) |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | ISR deferral |  |
Regulatory Assets [Line Items] |  |
Current Regulatory Assets | 0 | 0
Kentucky Utilities Co [Member] | IT system costs |  |
Regulatory Assets [Line Items] |  |
Noncurrent Regulatory Assets | $ 0 | $ 0

X
- Definition Amount of deferred recovery of the difference between the pension cost calculated in accordance with the entities pension accounting policy and pension cost using a 15 year amortization period for actuarial gains and losses. + References No definition available. + Details
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- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478742/980-340-50-1 + Details
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