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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2019
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.
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Defined benefit plans |  |
|  |  | Prior service costs |  | Actuarial gain (loss) |  | Total
PPL |  |  |  |  |  |  |  |  |
June 30, 2019 | $ | (1,616 | ) |  | $ | 6 |  |  | $ | (18 | ) |  | $ | (2,368 | ) |  | $ | (3,996 | )
Amounts arising during the period | (285 | ) |  | 16 |  |  | — |  |  | (5 | ) |  | (274 | )
Reclassifications from AOCI | — |  |  | (22 | ) |  | — |  |  | 20 |  |  | (2 | )
Net OCI during the period | (285 | ) |  | (6 | ) |  | — |  |  | 15 |  |  | (276 | )
September 30, 2019 | $ | (1,901 | ) |  | $ | — |  |  | $ | (18 | ) |  | $ | (2,353 | ) |  | $ | (4,272 | )
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Defined benefit plans |  |
|  |  | Prior service costs |  | Actuarial gain (loss) |  | Total
December 31, 2018 | $ | (1,533 | ) |  | $ | (7 | ) |  | $ | (19 | ) |  | $ | (2,405 | ) |  | $ | (3,964 | )
Amounts arising during the period | (368 | ) |  | 32 |  |  | — |  |  | (10 | ) |  | (346 | )
Reclassifications from AOCI | — |  |  | (25 | ) |  | 1 |  |  | 62 |  |  | 38 |
Net OCI during the period | (368 | ) |  | 7 |  |  | 1 |  |  | 52 |  |  | (308 | )
September 30, 2019 | $ | (1,901 | ) |  | $ | — |  |  | $ | (18 | ) |  | $ | (2,353 | ) |  | $ | (4,272 | )
June 30, 2018 | $ | (1,223 | ) |  | $ | (21 | ) |  | $ | (7 | ) |  | $ | (2,244 | ) |  | $ | (3,495 | )
Amounts arising during the period | (187 | ) |  | 22 |  |  | — |  |  | (8 | ) |  | (173 | )
Reclassifications from AOCI | — |  |  | (14 | ) |  | — |  |  | 34 |  |  | 20 |
Net OCI during the period | (187 | ) |  | 8 |  |  | — |  |  | 26 |  |  | (153 | )
September 30, 2018 | $ | (1,410 | ) |  | $ | (13 | ) |  | $ | (7 | ) |  | $ | (2,218 | ) |  | $ | (3,648 | )
December 31, 2017 | $ | (1,089 | ) |  | $ | (13 | ) |  | $ | (7 | ) |  | $ | (2,313 | ) |  | $ | (3,422 | )
Amounts arising during the period | (321 | ) |  | 21 |  |  | (1 | ) |  | (9 | ) |  | (310 | )
Reclassifications from AOCI | — |  |  | (21 | ) |  | 1 |  |  | 104 |  |  | 84 |
Net OCI during the period | (321 | ) |  | — |  |  | — |  |  | 95 |  |  | (226 | )
September 30, 2018 | $ | (1,410 | ) |  | $ | (13 | ) |  | $ | (7 | ) |  | $ | (2,218 | ) |  | $ | (3,648 | )
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 |  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | Statements of Income
Qualifying derivatives |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (2 | ) |  | $ | (2 | ) |  | $ | (6 | ) |  | $ | (6 | ) |  | Interest Expense
Cross-currency swaps |  | 27 |  |  | 18 |  |  | 34 |  |  | 30 |  |  | Other Income (Expense) - net
|  | — |  |  | 1 |  |  | — |  |  | 1 |  |  | Interest Expense
Total Pre-tax |  | 25 |  |  | 17 |  |  | 28 |  |  | 25 |  |  |
Income Taxes |  | (3 | ) |  | (3 | ) |  | (3 | ) |  | (4 | ) |  |
Total After-tax |  | 22 |  |  | 14 |  |  | 25 |  |  | 21 |  |  |
Defined benefit plans |  |  |  |  |  |  |  |  |  |
Prior service costs (a) |  | (1 | ) |  | (1 | ) |  | (2 | ) |  | (2 | ) |  |
Net actuarial loss (a) |  | (25 | ) |  | (42 | ) |  | (78 | ) |  | (130 | ) |  |
Total Pre-tax |  | (26 | ) |  | (43 | ) |  | (80 | ) |  | (132 | ) |  |
Income Taxes |  | 6 |  |  | 9 |  |  | 17 |  |  | 27 |  |  |
Total After-tax |  | (20 | ) |  | (34 | ) |  | (63 | ) |  | (105 | ) |  |
Total reclassifications during the period |  | $ | 2 |  |  | $ | (20 | ) |  | $ | (38 | ) |  | $ | (84 | ) |  |
(a) These AOCI components are included in the computation of net periodic defined benefit cost. See Note 10 for additional information.

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