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Income and Other Taxes (Unrecognized to End) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) Integer | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Income Tax Examination (Details) [Line Items] |  |  |
Number of major tax jurisdictions tax returns are filed | Integer | 4 |  |
Deferred Income Tax Expense (Benefit) | $ 516 | $ 330 | $ 203
Increase (Decrease) in Regulatory Assets and Liabilities | $ (52) | 63 | 88
US - Federal [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
Pennsylvania - State [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
Kentucky - State [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2014 and prior |  |
United Kingdom - Foreign [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2019 and prior |  |
Federal [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Net Operating Loss Carryforwards, Used During the Period | $ 1,115 |  |
Deferred Tax Assets, Operating Loss Carryforwards, Adjustment, Domestic | 506 |  |
Federal [Member] | Investment Tax Credit [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Used during the period | $ 272 |  |
PPL Electric Utilities Corp [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Number of major tax jurisdictions tax returns are filed | Integer | 2 |  |
Deferred Income Tax Expense (Benefit) | $ 79 | 83 | 90
Increase (Decrease) in Regulatory Assets and Liabilities | $ (96) | 40 | 43
PPL Electric Utilities Corp [Member] | US - Federal [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
PPL Electric Utilities Corp [Member] | Pennsylvania - State [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
Louisville Gas And Electric Co [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Number of major tax jurisdictions tax returns are filed | Integer | 2 |  |
Deferred Income Tax Expense (Benefit) | $ 9 | 3 | 56
Increase (Decrease) in Regulatory Assets and Liabilities | $ 23 | 0 | 19
Louisville Gas And Electric Co [Member] | US - Federal [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
Louisville Gas And Electric Co [Member] | Kentucky - State [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2014 and prior |  |
Kentucky Utilities Co [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Number of major tax jurisdictions tax returns are filed | Integer | 2 |  |
Deferred Income Tax Expense (Benefit) | $ 3 | 22 | 41
Increase (Decrease) in Regulatory Assets and Liabilities | $ 22 | $ 26 | $ 26
Kentucky Utilities Co [Member] | US - Federal [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2017 and prior |  |
Kentucky Utilities Co [Member] | Kentucky - State [Member] |  |  |
Income Tax Examination (Details) [Line Items] |  |  |
Income tax examination, year(s) no longer under examination | 2014 and prior |  |

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