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Utility Rate Regulation (Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Increase (Decrease) in Regulatory Assets and Liabilities | $ (162) | $ 68 | $ 37
Defined Benefit Plans [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 15 years |  |
Regulatory Assets and Liabilities - Defined Benefit Plans (Numeric) [Abstract] |  |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 72 | 79 |
PPL Electric [Member] | Storm Costs [Member] |  |  |
Regulatory Assets and Liabilities - Storm Costs (Numeric) [Abstract] |  |  |
Period over which storm costs will be recovered (in years) | 3 years |  |
PPL Electric [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 5 years |  |
PPL Electric [Member] | Storm Damage Expense Rider [Member] |  |  |
Regulatory Assets and Liabilities - Storm Damage Expense Rider (Numeric) [Abstract] |  |  |
Maximum reportable storm damage expenses to be recovered annually through base rates | $ 20 |  |
LGE [Member] | Gas Supply Clause [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 18 months |  |
LGE [Member] | Kentucky Public Service Commission [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Return on equity | 9.35% |  |
LGE [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 12 months |  |
KU [Member] | Kentucky Public Service Commission [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Return on equity | 9.35% |  |
KU [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 12 months |  |
PPL Electric Utilities Corp [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Increase (Decrease) in Regulatory Assets and Liabilities | $ (67) | 101 | 38
PPL Electric Utilities Corp [Member] | Storm Costs [Member] |  |  |
Regulatory Assets and Liabilities - Storm Costs (Numeric) [Abstract] |  |  |
Period over which storm costs will be recovered (in years) | 3 years |  |
PPL Electric Utilities Corp [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 5 years |  |
PPL Electric Utilities Corp [Member] | Storm Damage Expense Rider [Member] |  |  |
Regulatory Assets and Liabilities - Storm Damage Expense Rider (Numeric) [Abstract] |  |  |
Maximum reportable storm damage expenses to be recovered annually through base rates | $ 20 |  |
Louisville Gas And Electric Co [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Increase (Decrease) in Regulatory Assets and Liabilities | $ 12 | 3 | (25)
Louisville Gas And Electric Co [Member] | Defined Benefit Plans [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 15 years |  |
Regulatory Assets and Liabilities - Defined Benefit Plans (Numeric) [Abstract] |  |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 41 | 44 |
Louisville Gas And Electric Co [Member] | Gas Supply Clause [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 18 months |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Return on equity | 9.35% |  |
Louisville Gas And Electric Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 12 months |  |
Kentucky Utilities Co [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Increase (Decrease) in Regulatory Assets and Liabilities | $ 6 | (23) | $ (25)
Kentucky Utilities Co [Member] | Defined Benefit Plans [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 15 years |  |
Regulatory Assets and Liabilities - Defined Benefit Plans (Numeric) [Abstract] |  |  |
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period | $ 31 | $ 35 |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Return on equity | 9.35% |  |
Kentucky Utilities Co [Member] | Kentucky Public Service Commission [Member] | Environmental Cost Recovery [Member] |  |  |
Regulatory Assets and Liabilities (Numeric) [Line Items] |  |  |
Regulatory Asset Amortization Period | 12 months |  |

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- Definition The increase (decrease) during the reporting period in the value of assets that are created when regulatory agencies permits public utilities to defer costs (revenues) to the balance sheet. This element is a the increase (decrease) of regulatory assets and liabilities combined. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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