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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Receivables Net Current [Abstract] |  |
Accounts receivable reserve for uncollectible accounts | $ 51 | $ 54
Equity |  |
Common stock par value | $ 0.01 | $ 0.01
Common stock shares authorized | 1,560,000 | 1,560,000
Common stock shares issued | 693,398 | 679,731
Common stock shares outstanding | 693,398 | 679,731
PPL Electric Utilities Corp [Member] |  |
Receivables Net Current [Abstract] |  |
Accounts receivable reserve for uncollectible accounts | $ 24 | $ 28
Equity |  |
Common stock no par value | $ 0.00 | $ 0.00
Common stock shares authorized | 170,000 | 170,000
Common stock shares issued | 66,368 | 66,368
Common stock shares outstanding | 66,368 | 66,368
LG And E And KU Energy LLC [Member] |  |
Receivables Net Current [Abstract] |  |
Accounts receivable reserve for uncollectible accounts | $ 25 | $ 24
Louisville Gas And Electric Co [Member] |  |
Receivables Net Current [Abstract] |  |
Accounts receivable reserve for uncollectible accounts | $ 1 | $ 2
Equity |  |
Common stock no par value | $ 0.00 | $ 0.00
Common stock shares authorized | 75,000 | 75,000
Common stock shares issued | 21,294 | 21,294
Common stock shares outstanding | 21,294 | 21,294
Kentucky Utilities Co [Member] |  |
Receivables Net Current [Abstract] |  |
Accounts receivable reserve for uncollectible accounts | $ 1 | $ 2
Equity |  |
Common stock no par value | $ 0.00 | $ 0.00
Common stock shares authorized | 80,000 | 80,000
Common stock shares issued | 37,818 | 37,818
Common stock shares outstanding | 37,818 | 37,818

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