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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
PPL Electric Utilities Corp [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Receivable from affiliates     $ 222
Financing Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration]     CEP Reserves, Inc
PPL Electric Utilities Corp [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 64 $ 56  
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable 4   $ 7
PPL Electric Utilities Corp [Member] | CEP Reserves, Inc      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany note with affiliate maximum borrowing capacity 800    
PPL Electric Utilities Corp [Member] | Accounts receivable from affiliates [Member] | PPL Services [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable     4
PPL Electric Utilities Corp [Member] | Other Noncurrent Assets [Member] | PPL Services [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable     3
Louisville Gas And Electric Co [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Payable to affiliates $ 0   $ 43
Notes Payable, Related Party, Type [Extensible Enumeration] Affiliated Entity [Member]   Related Party
Louisville Gas And Electric Co [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 20 11  
Louisville Gas And Electric Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany Money Pool Agreement Unused Borrowing Capacity 661    
Louisville Gas And Electric Co [Member] | LKS [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction 30 29  
Kentucky Utilities Co [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Payable to affiliates $ 8   $ 73
Notes Payable, Related Party, Type [Extensible Enumeration] Affiliated Entity [Member]   Related Party
Kentucky Utilities Co [Member] | PPL Services [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 19 11  
Kentucky Utilities Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany Money Pool Agreement Unused Borrowing Capacity 433    
Kentucky Utilities Co [Member] | LKS [Member]      
Support Costs (Details) [Abstract]      
Related Party Transaction, Amounts of Transaction $ 38 $ 38