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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2022
Asset Retirement Obligation [Line Items] |
Asset Retirement Obligation Roll Forward | The changes in the carrying amounts of AROs were as follows:
| PPL |  | LG&E |  | KU
| 2022 |  | 2021 |  | 2022 |  | 2021 |  | 2022 |  | 2021
ARO at beginning of period | $ | 189 |  |  | $ | 182 |  |  | $ | 84 |  |  | $ | 67 |  |  | $ | 105 |  |  | $ | 115 |
Acquisition of RIE (a) | 10 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Accretion | 6 |  |  | 16 |  |  | 3 |  |  | 5 |  |  | 3 |  |  | 11 |
Obligations incurred | 2 |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |
Changes in estimated timing or cost | 15 |  |  | 56 |  |  | 12 |  |  | 40 |  |  | 4 |  |  | 16 |
Obligations settled | (45) |  |  | (65) |  |  | (15) |  |  | (28) |  |  | (30) |  |  | (37) |
ARO at end of period | $ | 177 |  |  | $ | 189 |  |  | $ | 86 |  |  | $ | 84 |  |  | $ | 82 |  |  | $ | 105 |
Louisville Gas And Electric Co [Member] |
Asset Retirement Obligation [Line Items] |
Asset Retirement Obligation Roll Forward | The changes in the carrying amounts of AROs were as follows:
| PPL |  | LG&E |  | KU
| 2022 |  | 2021 |  | 2022 |  | 2021 |  | 2022 |  | 2021
ARO at beginning of period | $ | 189 |  |  | $ | 182 |  |  | $ | 84 |  |  | $ | 67 |  |  | $ | 105 |  |  | $ | 115 |
Acquisition of RIE (a) | 10 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Accretion | 6 |  |  | 16 |  |  | 3 |  |  | 5 |  |  | 3 |  |  | 11 |
Obligations incurred | 2 |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |
Changes in estimated timing or cost | 15 |  |  | 56 |  |  | 12 |  |  | 40 |  |  | 4 |  |  | 16 |
Obligations settled | (45) |  |  | (65) |  |  | (15) |  |  | (28) |  |  | (30) |  |  | (37) |
ARO at end of period | $ | 177 |  |  | $ | 189 |  |  | $ | 86 |  |  | $ | 84 |  |  | $ | 82 |  |  | $ | 105 |
Kentucky Utilities Co [Member] |
Asset Retirement Obligation [Line Items] |
Asset Retirement Obligation Roll Forward | The changes in the carrying amounts of AROs were as follows:
| PPL |  | LG&E |  | KU
| 2022 |  | 2021 |  | 2022 |  | 2021 |  | 2022 |  | 2021
ARO at beginning of period | $ | 189 |  |  | $ | 182 |  |  | $ | 84 |  |  | $ | 67 |  |  | $ | 105 |  |  | $ | 115 |
Acquisition of RIE (a) | 10 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Accretion | 6 |  |  | 16 |  |  | 3 |  |  | 5 |  |  | 3 |  |  | 11 |
Obligations incurred | 2 |  |  | — |  |  | 2 |  |  | — |  |  | — |  |  | — |
Changes in estimated timing or cost | 15 |  |  | 56 |  |  | 12 |  |  | 40 |  |  | 4 |  |  | 16 |
Obligations settled | (45) |  |  | (65) |  |  | (15) |  |  | (28) |  |  | (30) |  |  | (37) |
ARO at end of period | $ | 177 |  |  | $ | 189 |  |  | $ | 86 |  |  | $ | 84 |  |  | $ | 82 |  |  | $ | 105 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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