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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2020
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 September 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 MonthsNine Months
 2020201920202019
PPL Electric from PPL Services
$11 $14 $37 $43 
LKE from PPL Services6 6 19 20 
PPL Electric from PPL EU Services44 38 126 112 
LG&E from LKS43 37 125 112 
KU from LKS45 42 132 126 
LG And E And KU Energy LLC [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 September 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 MonthsNine Months
 2020201920202019
PPL Electric from PPL Services
$11 $14 $37 $43 
LKE from PPL Services6 6 19 20 
PPL Electric from PPL EU Services44 38 126 112 
LG&E from LKS43 37 125 112 
KU from LKS45 42 132 126 
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 September 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 MonthsNine Months
 2020201920202019
PPL Electric from PPL Services
$11 $14 $37 $43 
LKE from PPL Services6 6 19 20 
PPL Electric from PPL EU Services44 38 126 112 
LG&E from LKS43 37 125 112 
KU from LKS45 42 132 126 
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 September 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 MonthsNine Months
 2020201920202019
PPL Electric from PPL Services
$11 $14 $37 $43 
LKE from PPL Services6 6 19 20 
PPL Electric from PPL EU Services44 38 126 112 
LG&E from LKS43 37 125 112 
KU from LKS45 42 132 126