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Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2021
PPL Electric Utilities Corp [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, PPL EU Services and LKS charged the following amounts for the periods ended June 30, 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 MonthsSix Months
 2021202020212020
PPL Electric from PPL Services
$11 $14 $21 $26 
PPL Electric from PPL EU Services49 41 99 82 
LG&E from LKS44 44 86 82 
KU from LKS45 46 89 87 
Louisville Gas And Electric Co [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, PPL EU Services and LKS charged the following amounts for the periods ended June 30, 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 MonthsSix Months
 2021202020212020
PPL Electric from PPL Services
$11 $14 $21 $26 
PPL Electric from PPL EU Services49 41 99 82 
LG&E from LKS44 44 86 82 
KU from LKS45 46 89 87 
Kentucky Utilities Co [Member]  
Related Party Transactions [Line Items]  
Intercompany Support Cost Allocations PPL Services, PPL EU Services and LKS charged the following amounts for the periods ended June 30, 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 MonthsSix Months
 2021202020212020
PPL Electric from PPL Services
$11 $14 $21 $26 
PPL Electric from PPL EU Services49 41 99 82 
LG&E from LKS44 44 86 82 
KU from LKS45 46 89 87