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Commitments and Contingencies - Guarantees and Other Assurances (Details) - 9 months ended Sep. 30, 2021 £ in Millions, $ in Millions | GBP (£) | USD ($)
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Other Guarantee (Numeric) [Abstract] |  |
Maximum aggregate coverage bodily injury and property damage |  | $ 225
Indemnification Cap, Surrenders of Tax Losses | £ | £ 50 |
PPL Guarantee [Member] | Indemnification Guarantee [Member] | Indemnifications related to the sale of the U.K. utility business [Domain] |  |
Other Guarantee (Numeric) [Abstract] |  |
Maximum exposure | £ | 7,881 |
PPL Guarantee [Member] | Indemnification Guarantee [Member] | Indemnifications related to certain tax liabilities related to the sale of the U.K. utility business [Domain] |  |
Other Guarantee (Numeric) [Abstract] |  |
Maximum exposure | £ | £ 50 |
LKE Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable. |
Contingent proportionate share of OVEC's outstanding debt |  | 94
Louisville Gas And Electric Co [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable |
Contingent proportionate share of OVEC's outstanding debt |  | 65
Kentucky Utilities Co [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable |
Contingent proportionate share of OVEC's outstanding debt |  | $ 29

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- Definition Maximum aggregate insurance coverage for liability assumed under contract for bodily injury and property damage. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Entity's contingent proportionate share of OVEC's outstanding debt. + 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. + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
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- Definition States the reasons why the guarantor is unable to develop an estimate of the maximum potential amount of future payments under its guarantee (or each group of similar guarantees). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
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