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Related Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2022
PPL Electric Utilities Corp [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, LKS and PPL EU Services charged the following amounts for the periods ended March 31, including amounts applied to accounts that are further distributed between capital and expense on the books of the recipients, based on methods that are believed to be reasonable.
 Three Months
 20222021
PPL Electric from PPL Services
$61 $10 
PPL Electric from PPL EU Services— 50 
LG&E from LKS39 42 
KU from LKS44 44 
Louisville Gas And Electric Co [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, LKS and PPL EU Services charged the following amounts for the periods ended March 31, including amounts applied to accounts that are further distributed between capital and expense on the books of the recipients, based on methods that are believed to be reasonable.
 Three Months
 20222021
PPL Electric from PPL Services
$61 $10 
PPL Electric from PPL EU Services— 50 
LG&E from LKS39 42 
KU from LKS44 44 
Kentucky Utilities Co [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, LKS and PPL EU Services charged the following amounts for the periods ended March 31, including amounts applied to accounts that are further distributed between capital and expense on the books of the recipients, based on methods that are believed to be reasonable.
 Three Months
 20222021
PPL Electric from PPL Services
$61 $10 
PPL Electric from PPL EU Services— 50 
LG&E from LKS39 42 
KU from LKS44 44