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Utility Rate Regulation (Tables) | 3 Months Ended
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Mar. 31, 2017
Utility Rate Regulation [Line Items] |
Regulatory Assets | The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.
| PPL |  | PPL Electric
| March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016
Current Regulatory Assets: |  |  |  |  |  |  |
Environmental cost recovery | $ | 6 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |
Generation formula rate | 11 |  |  | 11 |  |  | — |  |  | — |
Transmission service charge | — |  |  | 7 |  |  | — |  |  | 7 |
Smart meter rider | 8 |  |  | 6 |  |  | 8 |  |  | 6 |
Storm costs | 4 |  |  | 5 |  |  | 4 |  |  | 5 |
Other | 7 |  |  | 4 |  |  | 1 |  |  | 1 |
Total current regulatory assets (a) | $ | 36 |  |  | $ | 39 |  |  | $ | 13 |  |  | $ | 19 |
Noncurrent Regulatory Assets: |  |  |  |  |  |  |
Defined benefit plans | $ | 936 |  |  | $ | 947 |  |  | $ | 543 |  |  | $ | 549 |
Taxes recoverable through future rates | 343 |  |  | 340 |  |  | 343 |  |  | 340 |
Storm costs | 44 |  |  | 57 |  |  | — |  |  | 9 |
Unamortized loss on debt | 58 |  |  | 61 |  |  | 34 |  |  | 36 |
Interest rate swaps | 126 |  |  | 129 |  |  | — |  |  | — |
Accumulated cost of removal of utility plant | 160 |  |  | 159 |  |  | 160 |  |  | 159 |
AROs | 228 |  |  | 211 |  |  | — |  |  | — |
Other | 13 |  |  | 14 |  |  | — |  |  | 1 |
Total noncurrent regulatory assets | $ | 1,908 |  |  | $ | 1,918 |  |  | $ | 1,080 |  |  | $ | 1,094 |
Current Regulatory Liabilities: |  |  |  |  |  |  |
Generation supply charge | $ | 19 |  |  | $ | 23 |  |  | $ | 19 |  |  | $ | 23 |
Transmission service charge | 5 |  |  | — |  |  | 5 |  |  | — |
Demand side management | 2 |  |  | 3 |  |  | — |  |  | — |
Universal service rider | 14 |  |  | 14 |  |  | 14 |  |  | 14 |
Transmission formula rate | 6 |  |  | 15 |  |  | 6 |  |  | 15 |
Fuel adjustment clause | 13 |  |  | 11 |  |  | — |  |  | — |
Act 129 compliance rider | 16 |  |  | 17 |  |  | 16 |  |  | 17 |
Storm damage expense | 5 |  |  | 13 |  |  | 5 |  |  | 13 |
Other | 2 |  |  | 5 |  |  | 1 |  |  | 1 |
Total current regulatory liabilities | $ | 82 |  |  | $ | 101 |  |  | $ | 66 |  |  | $ | 83 |
| PPL |  | PPL Electric
| March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016
Noncurrent Regulatory Liabilities: |  |  |  |  |  |  |
Accumulated cost of removal of utility plant | $ | 701 |  |  | $ | 700 |  |  | $ | — |  |  | $ | — |
Power purchase agreement - OVEC (b) | 74 |  |  | 75 |  |  | — |  |  | — |
Net deferred tax assets | 22 |  |  | 23 |  |  | — |  |  | — |
Defined benefit plans | 23 |  |  | 23 |  |  | — |  |  | — |
Interest rate swaps | 76 |  |  | 78 |  |  | — |  |  | — |
Other | 1 |  |  | — |  |  | — |  |  | — |
Total noncurrent regulatory liabilities | $ | 897 |  |  | $ | 899 |  |  | $ | — |  |  | $ | — |
| LKE |  | LG&E |  | KU
| March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016 |  | March 31, 2017 |  | December 31, 2016
Current Regulatory Assets: |  |  |  |  |  |  |  |  |  |  |
Environmental cost recovery | $ | 6 |  |  | $ | 6 |  |  | $ | 6 |  |  | $ | 6 |  |  | $ | — |  |  | $ | — |
Generation formula rate | 11 |  |  | 11 |  |  | — |  |  | — |  |  | 11 |  |  | 11 |
Other | 6 |  |  | 3 |  |  | 6 |  |  | 3 |  |  | — |  |  | — |
Total current regulatory assets | $ | 23 |  |  | $ | 20 |  |  | $ | 12 |  |  | $ | 9 |  |  | $ | 11 |  |  | $ | 11 |
Noncurrent Regulatory Assets: |  |  |  |  |  |  |  |  |  |  |
Defined benefit plans | $ | 393 |  |  | $ | 398 |  |  | $ | 242 |  |  | $ | 246 |  |  | $ | 151 |  |  | $ | 152 |
Storm costs | 44 |  |  | 48 |  |  | 24 |  |  | 26 |  |  | 20 |  |  | 22 |
Unamortized loss on debt | 24 |  |  | 25 |  |  | 15 |  |  | 16 |  |  | 9 |  |  | 9 |
Interest rate swaps | 126 |  |  | 129 |  |  | 86 |  |  | 88 |  |  | 40 |  |  | 41 |
AROs | 228 |  |  | 211 |  |  | 77 |  |  | 70 |  |  | 151 |  |  | 141 |
Plant retirement costs | 3 |  |  | 4 |  |  | — |  |  | — |  |  | 3 |  |  | 4 |
Other | 10 |  |  | 9 |  |  | 4 |  |  | 4 |  |  | 6 |  |  | 5 |
Total noncurrent regulatory assets | $ | 828 |  |  | $ | 824 |  |  | $ | 448 |  |  | $ | 450 |  |  | $ | 380 |  |  | $ | 374 |
Current Regulatory Liabilities: |  |  |  |  |  |  |  |  |  |  |
Demand side management | $ | 2 |  |  | $ | 3 |  |  | $ | 1 |  |  | $ | 2 |  |  | $ | 1 |  |  | $ | 1 |
Fuel adjustment clause | 13 |  |  | 11 |  |  | 4 |  |  | 2 |  |  | 9 |  |  | 9 |
Other | 1 |  |  | 4 |  |  | — |  |  | 1 |  |  | 1 |  |  | 3 |
Total current regulatory liabilities | $ | 16 |  |  | $ | 18 |  |  | $ | 5 |  |  | $ | 5 |  |  | $ | 11 |  |  | $ | 13 |
Noncurrent Regulatory Liabilities: |  |  |  |  |  |  |  |  |  |  |
Accumulated cost of removal of utility plant | $ | 701 |  |  | $ | 700 |  |  | $ | 308 |  |  | $ | 305 |  |  | $ | 393 |  |  | $ | 395 |
Power purchase agreement - OVEC (b) | 74 |  |  | 75 |  |  | 51 |  |  | 52 |  |  | 23 |  |  | 23 |
Net deferred tax assets | 22 |  |  | 23 |  |  | 22 |  |  | 23 |  |  | — |  |  | — |
Defined benefit plans | 23 |  |  | 23 |  |  | — |  |  | — |  |  | 23 |  |  | 23 |
Interest rate swaps | 76 |  |  | 78 |  |  | 38 |  |  | 39 |  |  | 38 |  |  | 39 |
Other | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | — |
Total noncurrent regulatory liabilities | $ | 897 |  |  | $ | 899 |  |  | $ | 419 |  |  | $ | 419 |  |  | $ | 478 |  |  | $ | 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 that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44264-110382 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501251&loc=d3e52485-110419 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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