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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The after-tax changes in AOCI by component for the periods ended September 30 were as follows.
|  |  |  |  |  |  | Unrealized gains (losses) on qualifying derivatives |  |  |  | Defined benefit plans |  |
|  |  |  |  |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
PPL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
June 30, 2024 |  |  |  |  |  |  | $ | 7 |  |  | $ | 4 |  |  | $ | (4) |  |  | $ | (167) |  |  | $ | (160) |
Amounts arising during the period |  |  |  |  |  |  | — |  |  | — |  |  | — |  |  | (4) |  |  | (4) |
Reclassifications from AOCI |  |  |  |  |  |  | 2 |  |  | — |  |  | — |  |  | (1) |  |  | 1 |
Net OCI during the period |  |  |  |  |  |  | 2 |  |  | — |  |  | — |  |  | (5) |  |  | (3) |
September 30, 2024 |  |  |  |  |  |  | $ | 9 |  |  | $ | 4 |  |  | $ | (4) |  |  | $ | (172) |  |  | $ | (163) |
December 31, 2023 |  |  |  |  |  |  | $ | 6 |  |  | $ | 3 |  |  | $ | (4) |  |  | $ | (168) |  |  | $ | (163) |
Amounts arising during the period |  |  |  |  |  |  | — |  |  | 1 |  |  | — |  |  | (2) |  |  | (1) |
Reclassifications from AOCI |  |  |  |  |  |  | 3 |  |  | — |  |  | — |  |  | (2) |  |  | 1 |
Net OCI during the period |  |  |  |  |  |  | 3 |  |  | 1 |  |  | — |  |  | (4) |  |  | — |
September 30, 2024 |  |  |  |  |  |  | $ | 9 |  |  | $ | 4 |  |  | $ | (4) |  |  | $ | (172) |  |  | $ | (163) |
June 30, 2023 |  |  |  |  |  |  | $ | 4 |  |  | $ | 3 |  |  | $ | (4) |  |  | $ | (140) |  |  | $ | (137) |
Amounts arising during the period |  |  |  |  |  |  | — |  |  | — |  |  | — |  |  | (6) |  |  | (6) |
Reclassifications from AOCI |  |  |  |  |  |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Net OCI during the period |  |  |  |  |  |  | 1 |  |  | — |  |  | — |  |  | (6) |  |  | (5) |
September 30, 2023 |  |  |  |  |  |  | $ | 5 |  |  | $ | 3 |  |  | $ | (4) |  |  | $ | (146) |  |  | $ | (142) |
|  |  |  |  |  |  | Unrealized gains (losses) on qualifying derivatives |  |  |  | Defined benefit plans |  |
|  |  |  |  |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
December 31, 2022 |  |  |  |  |  |  | $ | 3 |  |  | $ | 2 |  |  | $ | (5) |  |  | $ | (124) |  |  | $ | (124) |
Amounts arising during the period |  |  |  |  |  |  | — |  |  | 1 |  |  | — |  |  | (21) |  |  | (20) |
Reclassifications from AOCI |  |  |  |  |  |  | 2 |  |  | — |  |  | 1 |  |  | (1) |  |  | 2 |
Net OCI during the period |  |  |  |  |  |  | 2 |  |  | 1 |  |  | 1 |  |  | (22) |  |  | (18) |
September 30, 2023 |  |  |  |  |  |  | $ | 5 |  |  | $ | 3 |  |  | $ | (4) |  |  | $ | (146) |  |  | $ | (142) |
Reclassification out of Other Comprehensive Income (Loss) | The following table presents PPL's gains (losses) and related income taxes for reclassifications from AOCI for the periods ended September 30.
|  | Three Months |  | Nine Months |  | Affected Line Item on the
Details about AOCI |  | 2024 |  | 2023 |  | 2024 |  | 2023 |  | Statements of Income
Qualifying derivatives |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (1) |  |  | $ | (1) |  |  | $ | (3) |  |  | $ | (3) |  |  | Interest Expense
Total Pre-tax |  | (1) |  |  | (1) |  |  | (3) |  |  | (3) |  |  |
Income Taxes |  | (1) |  |  | — |  |  | — |  |  | 1 |  |  |
Total After-tax |  | (2) |  |  | (1) |  |  | (3) |  |  | (2) |  |  |
Defined benefit plans |  |  |  |  |  |  |  |  |  |
Prior service costs (a) |  | — |  |  | — |  |  | — |  |  | (1) |  |  |
Net actuarial loss (a) |  | 1 |  |  | (1) |  |  | 3 |  |  | 1 |  |  |
Total Pre-tax |  | 1 |  |  | (1) |  |  | 3 |  |  | — |  |  |
Income Taxes |  | — |  |  | 1 |  |  | (1) |  |  | — |  |  |
Total After-tax |  | 1 |  |  | — |  |  | 2 |  |  | — |  |  |
Total reclassifications during the period |  | $ | (1) |  |  | $ | (1) |  |  | $ | (1) |  |  | $ | (2) |  |  |
(a) These AOCI components are included in the computation of net periodic defined benefit cost. See Note 9 for additional information.

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