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v3.19.3

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | --- | --- | --- | ---
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 670 |  | $ 621 |  |
Restricted Cash, Current | 3 |  | 3 |  |
Restricted Cash, Noncurrent | 17 |  | 19 |  |
Cash, Cash Equivalents and Restricted Cash | 690 |  | 643 | $ 864 | $ 511
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Right of Use Asset | 97 | $ 81 |  |  |
Lease Liability - Current | 25 | 23 |  |  |
Lease Liability - Noncurrent | 80 | 67 |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |  |
Cash and cash equivalents | 27 |  | 267 |  |
Restricted Cash, Current | 2 |  | 2 |  |
Restricted Cash, Noncurrent | 0 |  | 0 |  |
Cash, Cash Equivalents and Restricted Cash | 29 |  | 269 | 416 | 51
LG And E And KU Energy LLC [Member] |  |  |  |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |  |
Cash and cash equivalents | 30 |  | 24 | 29 | 30
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Right of Use Asset | 47 | 56 |  |  |
Lease Liability - Current | 16 | 18 |  |  |
Lease Liability - Noncurrent | 39 | 46 |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |  |
Cash and cash equivalents | 12 |  | 10 | 11 | 15
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Right of Use Asset | 19 | 23 |  |  |
Lease Liability - Current | 6 | 9 |  |  |
Lease Liability - Noncurrent | 16 | 18 |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |
Reconciliation of Cash, Cash Equivalents and Restricted Cash from the Balance Sheet to Cash Flow Statement [Line Items] |  |  |  |  |
Cash and cash equivalents | 18 |  | $ 14 | $ 18 | $ 15
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Right of Use Asset | 27 | 31 |  |  |
Lease Liability - Current | 9 | 9 |  |  |
Lease Liability - Noncurrent | $ 22 | $ 26 |  |  |

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