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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2020
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, 2020 | $ | (1,777) |  |  |  |  | $ | 8 |  |  |  |  | $ | (16) |  |  | $ | (2,817) |  |  | $ | (4,602) |
Amounts arising during the period | 643 |  |  |  |  | (52) |  |  |  |  | — |  |  | (16) |  |  | 575 |
Reclassifications from AOCI | — |  |  |  |  | 48 |  |  |  |  | — |  |  | 52 |  |  | 100 |
Net OCI during the period | 643 |  |  |  |  | (4) |  |  |  |  | — |  |  | 36 |  |  | 675 |
September 30, 2020 | $ | (1,134) |  |  |  |  | $ | 4 |  |  |  |  | $ | (16) |  |  | $ | (2,781) |  |  | $ | (3,927) |
December 31, 2019 | $ | (1,425) |  |  |  |  | $ | (5) |  |  |  |  | $ | (18) |  |  | $ | (2,910) |  |  | $ | (4,358) |
Amounts arising during the period | 291 |  |  |  |  | (16) |  |  |  |  | — |  |  | (17) |  |  | 258 |
Reclassifications from AOCI | — |  |  |  |  | 25 |  |  |  |  | 2 |  |  | 146 |  |  | 173 |
Net OCI during the period | 291 |  |  |  |  | 9 |  |  |  |  | 2 |  |  | 129 |  |  | 431 |
September 30, 2020 | $ | (1,134) |  |  |  |  | $ | 4 |  |  |  |  | $ | (16) |  |  | $ | (2,781) |  |  | $ | (3,927) |
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) |
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) |
| Foreign currency translation adjustments |  |  |  | Unrealized gains (losses) on qualifying derivatives |  |  |  | Defined benefit plans |  |
|  |  |  |  |  |  | Prior service costs |  | Actuarial gain (loss) |  | Total
LKE |  |  |  |  |  |  |  |  |  |  |  |  |
June 30, 2020 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (83) |  |  | $ | (91) |
Amounts arising during the period |  |  |  |  |  |  |  |  | — |  |  | (8) |  |  | (8) |
Reclassifications from AOCI |  |  |  |  |  |  |  |  | — |  |  | 5 |  |  | 5 |
Net OCI during the period |  |  |  |  |  |  |  |  | — |  |  | (3) |  |  | (3) |
September 30, 2020 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (86) |  |  | $ | (94) |
December 31, 2019 |  |  |  |  |  |  |  |  | $ | (9) |  |  | $ | (84) |  |  | $ | (93) |
Amounts arising during the period |  |  |  |  |  |  |  |  | — |  |  | (9) |  |  | (9) |
Reclassifications from AOCI |  |  |  |  |  |  |  |  | 1 |  |  | 7 |  |  | 8 |
Net OCI during the period |  |  |  |  |  |  |  |  | 1 |  |  | (2) |  |  | (1) |
September 30, 2020 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (86) |  |  | $ | (94) |
June 30, 2019 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (83) |  |  | $ | (91) |
Amounts arising during the period |  |  |  |  |  |  |  |  | — |  |  | — |  |  | — |
Reclassifications from AOCI |  |  |  |  |  |  |  |  | — |  |  | — |  |  | — |
Net OCI during the period |  |  |  |  |  |  |  |  | — |  |  | — |  |  | — |
September 30, 2019 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (83) |  |  | $ | (91) |
December 31, 2018 |  |  |  |  |  |  |  |  | $ | (9) |  |  | $ | (80) |  |  | $ | (89) |
Amounts arising during the period |  |  |  |  |  |  |  |  | — |  |  | (2) |  |  | (2) |
Reclassifications from AOCI |  |  |  |  |  |  |  |  | 1 |  |  | (1) |  |  | — |
Net OCI during the period |  |  |  |  |  |  |  |  | 1 |  |  | (3) |  |  | (2) |
September 30, 2019 |  |  |  |  |  |  |  |  | $ | (8) |  |  | $ | (83) |  |  | $ | (91) |
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 |  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | Statements of Income
Qualifying derivatives |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (4) |  |  | $ | (2) |  |  | $ | (9) |  |  | $ | (6) |  |  | Interest Expense
Cross-currency swaps |  | (56) |  |  | 27 |  |  | (24) |  |  | 34 |  |  | Other Income (Expense) - net
Total Pre-tax |  | (60) |  |  | 25 |  |  | (33) |  |  | 28 |  |  |
Income Taxes |  | 12 |  |  | (3) |  |  | 8 |  |  | (3) |  |  |
Total After-tax |  | (48) |  |  | 22 |  |  | (25) |  |  | 25 |  |  |
Defined benefit plans |  |  |  |  |  |  |  |  |  |
Prior service costs (a) |  | (1) |  |  | (1) |  |  | (3) |  |  | (2) |  |  |
Net actuarial loss (a) |  | (64) |  |  | (25) |  |  | (181) |  |  | (78) |  |  |
Total Pre-tax |  | (65) |  |  | (26) |  |  | (184) |  |  | (80) |  |  |
Income Taxes |  | 13 |  |  | 6 |  |  | 36 |  |  | 17 |  |  |
Total After-tax |  | (52) |  |  | (20) |  |  | (148) |  |  | (63) |  |  |
Total reclassifications during the period |  | $ | (100) |  |  | $ | 2 |  |  | $ | (173) |  |  | $ | (38) |  |  |
(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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