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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
PPL Electric Utilities Corp [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Receivable from affiliates $ 554   $ 0
Financing Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration] CEP Reserves, Inc   CEP Reserves, Inc
PPL Electric Utilities Corp [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 56 $ 59  
PPL Electric Utilities Corp [Member] | CEP Reserves, Inc      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany note with affiliate maximum borrowing capacity 800    
Louisville Gas And Electric Co [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction 11 8  
Louisville Gas And Electric Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany Money Pool Agreement Unused Borrowing Capacity 722    
Louisville Gas And Electric Co [Member] | LKS [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction 29 32  
Kentucky Utilities Co [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Payable to affiliates $ 37   $ 0
Notes Payable, Related Party, Type [Extensible Enumeration] Affiliated Entity [Member]   Affiliated Entity [Member]
Kentucky Utilities Co [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 11 9  
Kentucky Utilities Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany Money Pool Agreement Unused Borrowing Capacity 568    
Kentucky Utilities Co [Member] | LKS [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 38 $ 41