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Commitments and Contingencies - Environmental Matters and Other (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Amortization of excess deferred income taxes | $ (13) | $ (13) | $ (33) | $ (33) |
Period RIE Environmental Remediation Costs To Be Incurred Over | 30 years |  | 30 years |  |
RIE Environmental Remediation |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Accrual for Environmental Loss Contingencies, Gross | $ 99 |  | $ 99 |  | $ 99
PPL Electric [Member] | PPL Electric Additional Sites [Member] |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Accrual for Environmental Loss Contingencies, Gross | 8 |  | 8 |  | 8
PPL Electric Utilities Corp [Member] |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Amortization of excess deferred income taxes | (3) | (4) | (8) | (8) |
PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member] |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Accrual for Environmental Loss Contingencies, Gross | 8 |  | 8 |  | $ 8
Louisville Gas And Electric Co [Member] |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Amortization of excess deferred income taxes | (3) | (3) | (9) | (9) |
Kentucky Utilities Co [Member] |  |  |  |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |  |  |  |
Amortization of excess deferred income taxes | $ (4) | $ (5) | $ (13) | $ (13) |

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- Definition The portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the current period and the expected income tax expense (benefit) computed attributable to the amortization of excess deferred income taxes due to a change in the federal corporate income tax rate. + References No definition available. + Details
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- Definition Undiscounted amount of the accrual for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.Y.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481931/410-30-50-7 + Details
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