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Related Party Transactions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
PPL Electric Utilities Corp [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Receivable, Related Parties, Current $ 499 $ 0  
PPL Electric Utilities Corp [Member] | PPL Services [Member]      
Related Party Transactions [Line Items]      
Related Party Transaction, Amounts of Transaction 54 50 $ 59
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable 11 22  
PPL Electric Utilities Corp [Member] | PPL Services [Member] | Accounts receivable from affiliates [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable 10 10  
PPL Electric Utilities Corp [Member] | PPL Services [Member] | Other Noncurrent Assets [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
VEBA Funds Receivable 1 12  
PPL Electric Utilities Corp [Member] | PPL EU Services [Member]      
Related Party Transactions [Line Items]      
Related Party Transaction, Amounts of Transaction 222 176 152
PPL Electric Utilities Corp [Member] | PPL Energy Funding [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Intercompany note with affiliate maximum borrowing capacity 1,200    
Notes Receivable, Related Parties, Current 499 0  
Louisville Gas And Electric Co [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes payable to affiliates 324 0  
Louisville Gas And Electric Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Receivable, Related Parties, Current 324 0  
Intercompany Money Pool Agreement Maximum Borrowing Capacity 325    
Louisville Gas And Electric Co [Member] | LKS [Member]      
Related Party Transactions [Line Items]      
Related Party Transaction, Amounts of Transaction 169 170 160
Kentucky Utilities Co [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes payable to affiliates 294 0  
Kentucky Utilities Co [Member] | Parent And Affiliate [Member]      
Intercompany Borrowings (Numeric) [Abstract]      
Notes Receivable, Related Parties, Current 294 0  
Intercompany Money Pool Agreement Maximum Borrowing Capacity 300    
Kentucky Utilities Co [Member] | LKS [Member]      
Related Party Transactions [Line Items]      
Related Party Transaction, Amounts of Transaction $ 179 $ 180 $ 178