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v3.19.3.a.u2

New Accounting Guidance Adopted (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | ---
Other Noncurrent Assets [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Right of Use Asset | $ 96 | $ 81
Other Current Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Current | 26 | 23
Other Deferred Credits And Noncurrent Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Noncurrent | 78 | 67
LG And E And KU Energy LLC [Member] | Other Noncurrent Assets [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Right of Use Asset | 47 | 56
LG And E And KU Energy LLC [Member] | Other Current Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Current | 16 | 18
LG And E And KU Energy LLC [Member] | Other Deferred Credits And Noncurrent Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Noncurrent | 39 | 46
Louisville Gas And Electric Co [Member] | Other Noncurrent Assets [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Right of Use Asset | 18 | 23
Louisville Gas And Electric Co [Member] | Other Current Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Current | 6 | 9
Louisville Gas And Electric Co [Member] | Other Deferred Credits And Noncurrent Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Noncurrent | 15 | 18
Kentucky Utilities Co [Member] | Other Noncurrent Assets [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Right of Use Asset | 28 | 31
Kentucky Utilities Co [Member] | Other Current Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Current | 10 | 9
Kentucky Utilities Co [Member] | Other Deferred Credits And Noncurrent Liabilities [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Lease Liability - Noncurrent | $ 23 | $ 26

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