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Accumulated Other Comprehensive Income | 12 Months Ended
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Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated Other Comprehensive Income (Loss) | (PPL and LKE) The after-tax changes in AOCI by component for the years ended December 31 were as follows:
|  |  |  |  |  |  | Defined benefit plans |  |
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
PPL |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 | $ | (520 | ) |  | $ | (7 | ) |  | $ | — |  |  | $ | (6 | ) |  | $ | (2,195 | ) |  | $ | (2,728 | )
Amounts arising during the year | (1,107 | ) |  | 91 |  |  | — |  |  | (3 | ) |  | (61 | ) |  | (1,080 | )
Reclassifications from AOCI | — |  |  | (91 | ) |  | (1 | ) |  | 1 |  |  | 121 |  |  | 30 |
Net OCI during the year | (1,107 | ) |  | — |  |  | (1 | ) |  | (2 | ) |  | 60 |  |  | (1,050 | )
December 31, 2016 | $ | (1,627 | ) |  | $ | (7 | ) |  | $ | (1 | ) |  | $ | (8 | ) |  | $ | (2,135 | ) |  | $ | (3,778 | )
|  |  |  |  |  |  | Defined benefit plans |  |
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
Amounts arising during the year | 538 |  |  | (79 | ) |  | — |  |  | — |  |  | (308 | ) |  | 151 |
Reclassifications from AOCI | — |  |  | 73 |  |  | 1 |  |  | 1 |  |  | 130 |  |  | 205 |
Net OCI during the year | 538 |  |  | (6 | ) |  | 1 |  |  | 1 |  |  | (178 | ) |  | 356 |
December 31, 2017 | $ | (1,089 | ) |  | $ | (13 | ) |  | $ | — |  |  | $ | (7 | ) |  | $ | (2,313 | ) |  | $ | (3,422 | )
Amounts arising during the year | (444 | ) |  | 36 |  |  | — |  |  | (11 | ) |  | (187 | ) |  | (606 | )
Reclassifications from AOCI | — |  |  | (29 | ) |  | — |  |  | 2 |  |  | 142 |  |  | 115 |
Net OCI during the year | (444 | ) |  | 7 |  |  | — |  |  | (9 | ) |  | (45 | ) |  | (491 | )
Adoption of reclassification of certain tax effects from AOCI guidance cumulative effect adjustment (Note 1) | — |  |  | (1 | ) |  | — |  |  | (3 | ) |  | (47 | ) |  | (51 | )
December 31, 2018 | $ | (1,533 | ) |  | $ | (7 | ) |  | $ | — |  |  | $ | (19 | ) |  | $ | (2,405 | ) |  | $ | (3,964 | )
LKE |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 |  |  |  |  |  |  | $ | — |  |  | $ | (10 | ) |  | $ | (36 | ) |  | $ | (46 | )
Amounts arising during the year |  |  |  |  |  |  | — |  |  | — |  |  | (27 | ) |  | (27 | )
Reclassifications from AOCI |  |  |  |  | (1 | ) |  | 2 |  |  | 2 |  |  | 3 |
Net OCI during the year |  |  |  |  |  |  | (1 | ) |  | 2 |  |  | (25 | ) |  | (24 | )
December 31, 2016 |  |  |  |  |  |  | $ | (1 | ) |  | $ | (8 | ) |  | $ | (61 | ) |  | $ | (70 | )
Amounts arising during the year |  |  |  |  |  |  | — |  |  | (2 | ) |  | (23 | ) |  | (25 | )
Reclassifications from AOCI |  |  |  |  |  |  | 1 |  |  | 1 |  |  | 5 |  |  | 7 |
Net OCI during the year |  |  |  |  |  |  | 1 |  |  | (1 | ) |  | (18 | ) |  | (18 | )
December 31, 2017 |  |  |  |  |  |  | $ | — |  |  | $ | (9 | ) |  | $ | (79 | ) |  | $ | (88 | )
Amounts arising during the year |  |  |  |  |  | — |  |  | — |  |  | 7 |  |  | 7 |
Reclassifications from AOCI |  |  |  |  |  |  | — |  |  | 2 |  |  | 8 |  |  | 10 |
Net OCI during the year |  |  |  |  | — |  |  | 2 |  |  | 15 |  |  | 17 |
Adoption of reclassification of certain tax effects from AOCI guidance cumulative effect adjustment (Note 1) |  |  |  |  |  |  | — |  |  | (2 | ) |  | (16 | ) |  | (18 | )
December 31, 2018 |  |  |  |  |  |  | $ | — |  |  | $ | (9 | ) |  | $ | (80 | ) |  | $ | (89 | )
The following table presents PPL's gains (losses) and related income taxes for reclassifications from AOCI for the years ended December 31, 2018, 2017 and 2016. LKE amounts are insignificant for the years ended December 31, 2018, 2017 and 2016. The defined benefit plan components of AOCI are not reflected in their entirety in the statement of income; rather, they are included in the computation of net periodic defined benefit costs (credits) and subject to capitalization. See Note 11 for additional information.
|  | PPL |  |
Details about AOCI |  | 2018 |  | 2017 |  | 2016 |  | Affected Line Item on the Statements of Income
Qualifying derivatives |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (8 | ) |  | $ | (9 | ) |  | $ | (7 | ) |  | Interest Expense
Cross-currency swaps |  | 42 |  |  | (82 | ) |  | 116 |  |  | Other Income (Expense) - net
|  | 1 |  |  | — |  |  | 3 |  |  | Interest Expense
Total Pre-tax |  | 35 |  |  | (91 | ) |  | 112 |  |  |
Income Taxes |  | (6 | ) |  | 18 |  |  | (21 | ) |  |
Total After-tax |  | 29 |  |  | (73 | ) |  | 91 |  |  |
Equity Investees' AOCI |  | — |  |  | (1 | ) |  | 1 |  |  | Other Income (Expense) - net
Total Pre-tax |  | — |  |  | (1 | ) |  | 1 |  |  |
Income Taxes |  | — |  |  | — |  |  | — |  |  |
Total After-tax |  | — |  |  | (1 | ) |  | 1 |  |  |
Defined benefit plans |  |  |  |  |  |  |  |
Prior service costs |  | (2 | ) |  | (2 | ) |  | (2 | ) |  |
Net actuarial loss |  | (178 | ) |  | (167 | ) |  | (156 | ) |  |
Total Pre-tax |  | (180 | ) |  | (169 | ) |  | (158 | ) |  |
Income Taxes |  | 36 |  |  | 38 |  |  | 36 |  |  |
Total After-tax |  | (144 | ) |  | (131 | ) |  | (122 | ) |  |
Total reclassifications during the year |  | $ | (115 | ) |  | $ | (205 | ) |  | $ | (30 | ) |  |
LG And E And KU Energy LLC [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated Other Comprehensive Income (Loss) | (PPL and LKE) The after-tax changes in AOCI by component for the years ended December 31 were as follows:
|  |  |  |  |  |  | Defined benefit plans |  |
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
PPL |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 | $ | (520 | ) |  | $ | (7 | ) |  | $ | — |  |  | $ | (6 | ) |  | $ | (2,195 | ) |  | $ | (2,728 | )
Amounts arising during the year | (1,107 | ) |  | 91 |  |  | — |  |  | (3 | ) |  | (61 | ) |  | (1,080 | )
Reclassifications from AOCI | — |  |  | (91 | ) |  | (1 | ) |  | 1 |  |  | 121 |  |  | 30 |
Net OCI during the year | (1,107 | ) |  | — |  |  | (1 | ) |  | (2 | ) |  | 60 |  |  | (1,050 | )
December 31, 2016 | $ | (1,627 | ) |  | $ | (7 | ) |  | $ | (1 | ) |  | $ | (8 | ) |  | $ | (2,135 | ) |  | $ | (3,778 | )
|  |  |  |  |  |  | Defined benefit plans |  |
| Foreign currency translation adjustments |  | Unrealized gains (losses) on qualifying derivatives |  | Equity investees' AOCI |  | Prior service costs |  | Actuarial gain (loss) |  | Total
Amounts arising during the year | 538 |  |  | (79 | ) |  | — |  |  | — |  |  | (308 | ) |  | 151 |
Reclassifications from AOCI | — |  |  | 73 |  |  | 1 |  |  | 1 |  |  | 130 |  |  | 205 |
Net OCI during the year | 538 |  |  | (6 | ) |  | 1 |  |  | 1 |  |  | (178 | ) |  | 356 |
December 31, 2017 | $ | (1,089 | ) |  | $ | (13 | ) |  | $ | — |  |  | $ | (7 | ) |  | $ | (2,313 | ) |  | $ | (3,422 | )
Amounts arising during the year | (444 | ) |  | 36 |  |  | — |  |  | (11 | ) |  | (187 | ) |  | (606 | )
Reclassifications from AOCI | — |  |  | (29 | ) |  | — |  |  | 2 |  |  | 142 |  |  | 115 |
Net OCI during the year | (444 | ) |  | 7 |  |  | — |  |  | (9 | ) |  | (45 | ) |  | (491 | )
Adoption of reclassification of certain tax effects from AOCI guidance cumulative effect adjustment (Note 1) | — |  |  | (1 | ) |  | — |  |  | (3 | ) |  | (47 | ) |  | (51 | )
December 31, 2018 | $ | (1,533 | ) |  | $ | (7 | ) |  | $ | — |  |  | $ | (19 | ) |  | $ | (2,405 | ) |  | $ | (3,964 | )
LKE |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 |  |  |  |  |  |  | $ | — |  |  | $ | (10 | ) |  | $ | (36 | ) |  | $ | (46 | )
Amounts arising during the year |  |  |  |  |  |  | — |  |  | — |  |  | (27 | ) |  | (27 | )
Reclassifications from AOCI |  |  |  |  | (1 | ) |  | 2 |  |  | 2 |  |  | 3 |
Net OCI during the year |  |  |  |  |  |  | (1 | ) |  | 2 |  |  | (25 | ) |  | (24 | )
December 31, 2016 |  |  |  |  |  |  | $ | (1 | ) |  | $ | (8 | ) |  | $ | (61 | ) |  | $ | (70 | )
Amounts arising during the year |  |  |  |  |  |  | — |  |  | (2 | ) |  | (23 | ) |  | (25 | )
Reclassifications from AOCI |  |  |  |  |  |  | 1 |  |  | 1 |  |  | 5 |  |  | 7 |
Net OCI during the year |  |  |  |  |  |  | 1 |  |  | (1 | ) |  | (18 | ) |  | (18 | )
December 31, 2017 |  |  |  |  |  |  | $ | — |  |  | $ | (9 | ) |  | $ | (79 | ) |  | $ | (88 | )
Amounts arising during the year |  |  |  |  |  | — |  |  | — |  |  | 7 |  |  | 7 |
Reclassifications from AOCI |  |  |  |  |  |  | — |  |  | 2 |  |  | 8 |  |  | 10 |
Net OCI during the year |  |  |  |  | — |  |  | 2 |  |  | 15 |  |  | 17 |
Adoption of reclassification of certain tax effects from AOCI guidance cumulative effect adjustment (Note 1) |  |  |  |  |  |  | — |  |  | (2 | ) |  | (16 | ) |  | (18 | )
December 31, 2018 |  |  |  |  |  |  | $ | — |  |  | $ | (9 | ) |  | $ | (80 | ) |  | $ | (89 | )
The following table presents PPL's gains (losses) and related income taxes for reclassifications from AOCI for the years ended December 31, 2018, 2017 and 2016. LKE amounts are insignificant for the years ended December 31, 2018, 2017 and 2016. The defined benefit plan components of AOCI are not reflected in their entirety in the statement of income; rather, they are included in the computation of net periodic defined benefit costs (credits) and subject to capitalization. See Note 11 for additional information.
|  | PPL |  |
Details about AOCI |  | 2018 |  | 2017 |  | 2016 |  | Affected Line Item on the Statements of Income
Qualifying derivatives |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (8 | ) |  | $ | (9 | ) |  | $ | (7 | ) |  | Interest Expense
Cross-currency swaps |  | 42 |  |  | (82 | ) |  | 116 |  |  | Other Income (Expense) - net
|  | 1 |  |  | — |  |  | 3 |  |  | Interest Expense
Total Pre-tax |  | 35 |  |  | (91 | ) |  | 112 |  |  |
Income Taxes |  | (6 | ) |  | 18 |  |  | (21 | ) |  |
Total After-tax |  | 29 |  |  | (73 | ) |  | 91 |  |  |
Equity Investees' AOCI |  | — |  |  | (1 | ) |  | 1 |  |  | Other Income (Expense) - net
Total Pre-tax |  | — |  |  | (1 | ) |  | 1 |  |  |
Income Taxes |  | — |  |  | — |  |  | — |  |  |
Total After-tax |  | — |  |  | (1 | ) |  | 1 |  |  |
Defined benefit plans |  |  |  |  |  |  |  |
Prior service costs |  | (2 | ) |  | (2 | ) |  | (2 | ) |  |
Net actuarial loss |  | (178 | ) |  | (167 | ) |  | (156 | ) |  |
Total Pre-tax |  | (180 | ) |  | (169 | ) |  | (158 | ) |  |
Income Taxes |  | 36 |  |  | 38 |  |  | 36 |  |  |
Total After-tax |  | (144 | ) |  | (131 | ) |  | (122 | ) |  |
Total reclassifications during the year |  | $ | (115 | ) |  | $ | (205 | ) |  | $ | (30 | ) |  |

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