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Utility Rate Regulation (Tables) | 9 Months Ended
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Sep. 30, 2017
Utility Rate Regulation [Line Items] |
Regulatory Assets and Liabilities | The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.
| PPL |  | PPL Electric
| September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016
Current Regulatory Assets: |  |  |  |  |  |  |
Environmental cost recovery | $ | 4 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |
Generation formula rate | 8 |  |  | 11 |  |  | — |  |  | — |
Transmission service charge | — |  |  | 7 |  |  | — |  |  | 7 |
Gas supply clause | 6 |  |  | 3 |  |  | — |  |  | — |
Smart meter rider | 12 |  |  | 6 |  |  | 12 |  |  | 6 |
Storm costs | 1 |  |  | 5 |  |  | 1 |  |  | 5 |
Other | 3 |  |  | 1 |  |  | 1 |  |  | 1 |
Total current regulatory assets (a) | $ | 34 |  |  | $ | 39 |  |  | $ | 14 |  |  | $ | 19 |
Noncurrent Regulatory Assets: |  |  |  |  |  |  |
Defined benefit plans | $ | 908 |  |  | $ | 947 |  |  | $ | 530 |  |  | $ | 549 |
Taxes recoverable through future rates | 347 |  |  | 340 |  |  | 347 |  |  | 340 |
Storm costs | 37 |  |  | 57 |  |  | — |  |  | 9 |
Unamortized loss on debt | 55 |  |  | 61 |  |  | 30 |  |  | 36 |
Interest rate swaps | 29 |  |  | 31 |  |  | — |  |  | — |
Terminated interest rate swaps | 93 |  |  | 98 |  |  | — |  |  | — |
Accumulated cost of removal of utility plant | 166 |  |  | 159 |  |  | 166 |  |  | 159 |
AROs | 224 |  |  | 211 |  |  | — |  |  | — |
Other | 10 |  |  | 14 |  |  | — |  |  | 1 |
Total noncurrent regulatory assets | $ | 1,869 |  |  | $ | 1,918 |  |  | $ | 1,073 |  |  | $ | 1,094 |
| PPL |  | PPL Electric
| September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016
Current Regulatory Liabilities: |  |  |  |  |  |  |
Generation supply charge | $ | 29 |  |  | $ | 23 |  |  | $ | 29 |  |  | $ | 23 |
Transmission service charge | 6 |  |  | — |  |  | 6 |  |  | — |
Universal service rider | 19 |  |  | 14 |  |  | 19 |  |  | 14 |
Transmission formula rate | 4 |  |  | 15 |  |  | 4 |  |  | 15 |
Fuel adjustment clause | 11 |  |  | 11 |  |  | — |  |  | — |
Act 129 compliance rider | 7 |  |  | 17 |  |  | 7 |  |  | 17 |
Storm damage expense | 7 |  |  | 13 |  |  | 7 |  |  | 13 |
Other | 4 |  |  | 8 |  |  | — |  |  | 1 |
Total current regulatory liabilities | $ | 87 |  |  | $ | 101 |  |  | $ | 72 |  |  | $ | 83 |
Noncurrent Regulatory Liabilities: |  |  |  |  |  |  |
Accumulated cost of removal of utility plant | $ | 678 |  |  | $ | 700 |  |  | $ | — |  |  | $ | — |
Power purchase agreement - OVEC (b) | 69 |  |  | 75 |  |  | — |  |  | — |
Net deferred tax assets | 21 |  |  | 23 |  |  | — |  |  | — |
Defined benefit plans | 27 |  |  | 23 |  |  | — |  |  | — |
Terminated interest rate swaps | 74 |  |  | 78 |  |  | — |  |  | — |
Other | 4 |  |  | — |  |  | — |  |  | — |
Total noncurrent regulatory liabilities | $ | 873 |  |  | $ | 899 |  |  | $ | — |  |  | $ | — |
| LKE |  | LG&E |  | KU
| September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016
Current Regulatory Assets: |  |  |  |  |  |  |  |  |  |  |
Environmental cost recovery | $ | 4 |  |  | $ | 6 |  |  | $ | 4 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |
Generation formula rate | 8 |  |  | 11 |  |  | — |  |  | — |  |  | 8 |  |  | 11 |
Gas supply clause | 6 |  |  | 3 |  |  | 6 |  |  | 3 |  |  | — |  |  | — |
Other | 2 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |  |  | — |
Total current regulatory assets | $ | 20 |  |  | $ | 20 |  |  | $ | 11 |  |  | $ | 9 |  |  | $ | 9 |  |  | $ | 11 |
Noncurrent Regulatory Assets: |  |  |  |  |  |  |  |  |  |  |
Defined benefit plans | $ | 378 |  |  | $ | 398 |  |  | $ | 235 |  |  | $ | 246 |  |  | $ | 143 |  |  | $ | 152 |
Storm costs | 37 |  |  | 48 |  |  | 20 |  |  | 26 |  |  | 17 |  |  | 22 |
Unamortized loss on debt | 25 |  |  | 25 |  |  | 16 |  |  | 16 |  |  | 9 |  |  | 9 |
Interest rate swaps | 29 |  |  | 31 |  |  | 29 |  |  | 31 |  |  | — |  |  | — |
Terminated interest rate swaps | 93 |  |  | 98 |  |  | 54 |  |  | 57 |  |  | 39 |  |  | 41 |
AROs | 224 |  |  | 211 |  |  | 57 |  |  | 70 |  |  | 167 |  |  | 141 |
Plant retirement costs | 2 |  |  | 4 |  |  | — |  |  | — |  |  | 2 |  |  | 4 |
Other | 8 |  |  | 9 |  |  | 2 |  |  | 4 |  |  | 6 |  |  | 5 |
Total noncurrent regulatory assets | $ | 796 |  |  | $ | 824 |  |  | $ | 413 |  |  | $ | 450 |  |  | $ | 383 |  |  | $ | 374 |
| LKE |  | LG&E |  | KU
| September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016 |  | September 30, 2017 |  | December 31, 2016
Current Regulatory Liabilities: |  |  |  |  |  |  |  |  |  |  |
Demand side management | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 2 |  |  | $ | — |  |  | $ | 1 |
Fuel adjustment clause | 11 |  |  | 11 |  |  | 3 |  |  | 2 |  |  | 8 |  |  | 9 |
Other | 4 |  |  | 4 |  |  | 2 |  |  | 1 |  |  | 2 |  |  | 3 |
Total current regulatory liabilities | $ | 15 |  |  | $ | 18 |  |  | $ | 5 |  |  | $ | 5 |  |  | $ | 10 |  |  | $ | 13 |
Noncurrent Regulatory Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accumulated cost of removal of utility plant | $ | 678 |  |  | $ | 700 |  |  | $ | 281 |  |  | $ | 305 |  |  | $ | 397 |  |  | $ | 395 |
Power purchase agreement - OVEC (b) | 69 |  |  | 75 |  |  | 48 |  |  | 52 |  |  | 21 |  |  | 23 |
Net deferred tax assets | 21 |  |  | 23 |  |  | 21 |  |  | 23 |  |  | — |  |  | — |
Defined benefit plans | 27 |  |  | 23 |  |  | — |  |  | — |  |  | 27 |  |  | 23 |
Terminated interest rate swaps | 74 |  |  | 78 |  |  | 37 |  |  | 39 |  |  | 37 |  |  | 39 |
Other | 4 |  |  | — |  |  | 1 |  |  | — |  |  | 3 |  |  | — |
Total noncurrent regulatory liabilities | $ | 873 |  |  | $ | 899 |  |  | $ | 388 |  |  | $ | 419 |  |  | $ | 485 |  |  | $ | 480 |
(a) | For PPL, these amounts are included in "Other current assets" on the Balance Sheets.
(b) | This liability was recorded as an offset to an intangible asset that was recorded at fair value upon the acquisition of LKE by PPL.

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- Definition Tabular disclosure of assets and liabilities that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References No definition available. + Details
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