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Accumulated Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated Other Comprehensive Income (Loss) | 17. Accumulated Other Comprehensive Income (Loss) (PPL) The after-tax changes in AOCI by component for the periods ended March 31 were as follows.
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Defined benefit plans |  |
|  |  | Prior service costs |  | Actuarial gain (loss) |  | Total
PPL |  |  |  |  |  |  |  |  |
December 31, 2018 | $ | (1,533 | ) |  | $ | (7 | ) |  | $ | (19 | ) |  | $ | (2,405 | ) |  | $ | (3,964 | )
Amounts arising during the period | 294 |  |  | (19 | ) |  | — |  |  | (3 | ) |  | 272 |
Reclassifications from AOCI | — |  |  | 24 |  |  | — |  |  | 21 |  |  | 45 |
Net OCI during the period | 294 |  |  | 5 |  |  | — |  |  | 18 |  |  | 317 |
March 31, 2019 | $ | (1,239 | ) |  | $ | (2 | ) |  | $ | (19 | ) |  | $ | (2,387 | ) |  | $ | (3,647 | )
December 31, 2017 | $ | (1,089 | ) |  | $ | (13 | ) |  | $ | (7 | ) |  | $ | (2,313 | ) |  | $ | (3,422 | )
Amounts arising during the period | 116 |  |  | (20 | ) |  | — |  |  | (1 | ) |  | 95 |
Reclassifications from AOCI | — |  |  | 12 |  |  | — |  |  | 36 |  |  | 48 |
Net OCI during the period | 116 |  |  | (8 | ) |  | — |  |  | 35 |  |  | 143 |
March 31, 2018 | $ | (973 | ) |  | $ | (21 | ) |  | $ | (7 | ) |  | $ | (2,278 | ) |  | $ | (3,279 | )
The following table presents PPL's gains (losses) and related income taxes for reclassifications from AOCI for the periods ended March 31.
|  | Three Months |  | Affected Line Item on the
Details about AOCI |  | 2019 |  | 2018 |  | Statements of Income
Qualifying derivatives |  |  |  |  |  |
Interest rate swaps |  | $ | (2 | ) |  | $ | (2 | ) |  | Interest Expense
Cross-currency swaps |  | (28 | ) |  | (12 | ) |  | Other Income (Expense) - net
Total Pre-tax |  | (30 | ) |  | (14 | ) |  |
Income Taxes |  | 6 |  |  | 2 |  |  |
Total After-tax |  | (24 | ) |  | (12 | ) |  |
Defined benefit plans |  |  |  |  |  |
Net actuarial loss (a) |  | (26 | ) |  | (45 | ) |  |
Total Pre-tax |  | (26 | ) |  | (45 | ) |  |
Income Taxes |  | 5 |  |  | 9 |  |  |
Total After-tax |  | (21 | ) |  | (36 | ) |  |
Total reclassifications during the period |  | $ | (45 | ) |  | $ | (48 | ) |  |
(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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- Definition The entire disclosure of accumulated other comprehensive income (loss). + References No definition available. + Details
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Namespace Prefix: | ppl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration