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Commitments and Contingencies (Guarantees and Other Assurances) (Details) - Dec. 31, 2021 £ in Millions, $ in Millions | USD ($) | GBP (£)
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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] |  |
Guarantor Obligations [Line Items] |  |
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] |  |
Guarantor Obligations [Line Items] |  |
Maximum exposure | 50 |
LGE And KU Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Contingent potential proportionate share of OVEC's outstanding debt | 92 |
Louisville Gas And Electric Co [Member] | LGE And KU Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Contingent potential proportionate share of OVEC's outstanding debt | 64 |
Kentucky Utilities Co [Member] | LGE And KU Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Contingent potential proportionate share of OVEC's outstanding debt | 28 |
LGE [Member] | LGE And KU Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Contingent potential proportionate share of OVEC's outstanding debt | 64 |
KU [Member] | LGE And KU Guarantee [Member] | Financial Guarantee [Member] | LGE And KU Guarantee Of Shortfall Related To OVEC [Member] |  |
Guarantor Obligations [Line Items] |  |
Contingent potential proportionate share of OVEC's outstanding debt | $ 28 |

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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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