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Commitments and Contingencies - Guarantees and Other Assurances (Details) - 9 months ended Sep. 30, 2025 £ in Millions, $ in Millions | USD ($) | GBP (£) | USD ($)
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Other Guarantee (Numeric) [Abstract] |  |  |
Maximum aggregate coverage bodily injury and property damage |  |  | $ 231
Indemnification Cap, Surrenders of Tax Losses | £ |  | £ 50 |
Indemnification for Safari sale/leaseback | $ 25 |  |
Maximum Aggregate Coverage Bodily Injury And Property Damage, Wildfire |  |  | 181
Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] | LGE [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Recorded liability for all guarantees |  |  | 50
Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] | KU [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Recorded liability for all guarantees |  |  | 23
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 |
PPL Guarantee [Member] | Indemnification Guarantee [Member] | Guarantee of payment obligations under certain sale/leaseback financing transactions related to the sale of Safari Holdings |  |  |
Other Guarantee (Numeric) [Abstract] |  |  |
Maximum exposure |  |  | 81
PPL Guarantee [Member] | Indemnification Guarantee [Member] | Indemnifications for losses suffered related to items not covered by Aspen Power's representation and warranty insurance associated with the sale of Safari Holdings |  |  |
Other Guarantee (Numeric) [Abstract] |  |  |
Maximum exposure |  |  | 140
LKE Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Recorded liability for all guarantees |  |  | 73
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable. |  |
Louisville Gas And Electric Co [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Recorded liability for all guarantees |  |  | 50
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable |  |
Kentucky Utilities Co [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Recorded liability for all guarantees |  |  | $ 23
Maximum exposure is not estimable | The maximum exposure and the expiration date of these potential obligations are not presently determinable |  |

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- Definition The amount of the cap on an indemnity with respect to certain surrenders of tax losses. + References No definition available. + Details
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- Definition Indemnification for Safari sale/leaseback + References No definition available. + Details
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- Definition Maximum aggregate insurance coverage for liability assumed under contract for bodily injury and property damage not related to wildfires + References No definition available. + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + 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://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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