Income and Other Taxes (Tax Reform) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Tax Reform [Line Items]
Income Tax Expense (Benefit)	$ 184	$ 201	$ 503
Net Increase in Regulatory Liability	37	119	(52)
Deferred Tax Liabilities, Net	3,095	3,000
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)	168	174	154
Net Increase in Regulatory Liability	38	59	(96)
Deferred Tax Liabilities, Net	1,573	1,514
Louisville Gas And Electric Co [Member]
Tax Reform [Line Items]
Income Tax Expense (Benefit)	69	63	54
Net Increase in Regulatory Liability	(25)	(17)	23
Deferred Tax Liabilities, Net	776	771
Kentucky Utilities Co [Member]
Tax Reform [Line Items]
Income Tax Expense (Benefit)	77	76	67
Net Increase in Regulatory Liability	(25)	19	$ 22
Deferred Tax Liabilities, Net	$ 912	$ 896