Income and Other Taxes (Tax Reform) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Tax Reform [Line Items]
Income Tax Expense (Benefit)	$ 503	$ 314	$ 183
Net Increase in Regulatory Liability	(52)	63	88
Deferred Tax Liabilities, Net	3,139	2,519
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, U.K. Finance Act 2021, Amount	383
Deferred Tax Assets, Valuation Allowance, Increase due to Loss on Extinguishment of Debt	31
PPL Electric Utilities Corp [Member]
Tax Reform [Line Items]
Income Tax Expense (Benefit)	154	167	149
Net Increase in Regulatory Liability	(96)	40	43
Deferred Tax Liabilities, Net	1,668	1,559
Louisville Gas And Electric Co [Member]
Tax Reform [Line Items]
Income Tax Expense (Benefit)	54	62	63
Net Increase in Regulatory Liability	23	0	19
Deferred Tax Liabilities, Net	751	716
Kentucky Utilities Co [Member]
Tax Reform [Line Items]
Income Tax Expense (Benefit)	67	63	79
Net Increase in Regulatory Liability	22	26	$ 26
Deferred Tax Liabilities, Net	$ 865	$ 835