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Asset Retirement Obligations | 6 Months Ended
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Jun. 30, 2025
Asset Retirement Obligations [Line Items] |
Asset Retirement Obligations | 15. Asset Retirement Obligations (PPL, LG&E and KU) PPL's, LG&E's and KU's ARO liabilities are primarily related to CCR closure costs. See Note 10 for information on the CCR rule. LG&E and RIE also have AROs related to natural gas mains and wells. LG&E's and KU's transmission and distribution lines largely operate under perpetual property easement agreements, which do not generally require restoration upon removal of the property. Therefore, no material AROs are recorded for transmission and distribution assets. For LG&E, KU and RIE, all ARO accretion and depreciation expenses are reclassified as a regulatory asset or regulatory liability. ARO regulatory assets associated with certain CCR projects are amortized to expense in accordance with regulatory approvals. For other AROs, deferred accretion and depreciation expense is recovered through cost of removal. The changes in the carrying amounts of AROs were as follows.
| PPL |  | LG&E |  | KU
Balance at December 31, 2024 | $ | 157 |  |  | $ | 84 |  |  | $ | 64 |
Accretion | 4 |  |  | 2 |  |  | 2 |
Obligations settled | (8) |  |  | (4) |  |  | (4) |
Balance at June 30, 2025 | $ | 153 |  |  | $ | 82 |  |  | $ | 62 |
Louisville Gas And Electric Co [Member] |
Asset Retirement Obligations [Line Items] |
Asset Retirement Obligations | 15. Asset Retirement Obligations (PPL, LG&E and KU) PPL's, LG&E's and KU's ARO liabilities are primarily related to CCR closure costs. See Note 10 for information on the CCR rule. LG&E and RIE also have AROs related to natural gas mains and wells. LG&E's and KU's transmission and distribution lines largely operate under perpetual property easement agreements, which do not generally require restoration upon removal of the property. Therefore, no material AROs are recorded for transmission and distribution assets. For LG&E, KU and RIE, all ARO accretion and depreciation expenses are reclassified as a regulatory asset or regulatory liability. ARO regulatory assets associated with certain CCR projects are amortized to expense in accordance with regulatory approvals. For other AROs, deferred accretion and depreciation expense is recovered through cost of removal. The changes in the carrying amounts of AROs were as follows.
| PPL |  | LG&E |  | KU
Balance at December 31, 2024 | $ | 157 |  |  | $ | 84 |  |  | $ | 64 |
Accretion | 4 |  |  | 2 |  |  | 2 |
Obligations settled | (8) |  |  | (4) |  |  | (4) |
Balance at June 30, 2025 | $ | 153 |  |  | $ | 82 |  |  | $ | 62 |
Kentucky Utilities Co [Member] |
Asset Retirement Obligations [Line Items] |
Asset Retirement Obligations | 15. Asset Retirement Obligations (PPL, LG&E and KU) PPL's, LG&E's and KU's ARO liabilities are primarily related to CCR closure costs. See Note 10 for information on the CCR rule. LG&E and RIE also have AROs related to natural gas mains and wells. LG&E's and KU's transmission and distribution lines largely operate under perpetual property easement agreements, which do not generally require restoration upon removal of the property. Therefore, no material AROs are recorded for transmission and distribution assets. For LG&E, KU and RIE, all ARO accretion and depreciation expenses are reclassified as a regulatory asset or regulatory liability. ARO regulatory assets associated with certain CCR projects are amortized to expense in accordance with regulatory approvals. For other AROs, deferred accretion and depreciation expense is recovered through cost of removal. The changes in the carrying amounts of AROs were as follows.
| PPL |  | LG&E |  | KU
Balance at December 31, 2024 | $ | 157 |  |  | $ | 84 |  |  | $ | 64 |
Accretion | 4 |  |  | 2 |  |  | 2 |
Obligations settled | (8) |  |  | (4) |  |  | (4) |
Balance at June 30, 2025 | $ | 153 |  |  | $ | 82 |  |  | $ | 62 |

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/410-20/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 20 -Topic 410 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-2 + Details
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