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Income and Other Taxes (Tax Reform) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Tax Reform [Line Items]      
Income Tax Expense (Benefit) $ 291 $ 228 $ 184
Net Increase in Regulatory Liability (162) 68 37
Deferred Tax Liabilities, Net 3,497 3,344  
PPL Electric Utilities Corp [Member]      
Tax Reform [Line Items]      
Income Tax Expense (Benefit) 204 176 168
Net Increase in Regulatory Liability (67) 101 38
Deferred Tax Liabilities, Net 1,781 1,726  
Louisville Gas And Electric Co [Member]      
Tax Reform [Line Items]      
Income Tax Expense (Benefit) 78 77 69
Net Increase in Regulatory Liability 12 3 (25)
Deferred Tax Liabilities, Net 819 803  
Kentucky Utilities Co [Member]      
Tax Reform [Line Items]      
Income Tax Expense (Benefit) 99 89 77
Net Increase in Regulatory Liability 6 (23) $ (25)
Deferred Tax Liabilities, Net $ 956 $ 924