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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 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 years ended December 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.
 202020192018
PPL Electric from PPL Services$50 $59 $59 
LKE from PPL Services27 28 26 
PPL Electric from PPL EU Services176 152 148 
LG&E from LKS170 160 151 
KU from LKS180 178 169 
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 years ended December 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.
 202020192018
PPL Electric from PPL Services$50 $59 $59 
LKE from PPL Services27 28 26 
PPL Electric from PPL EU Services176 152 148 
LG&E from LKS170 160 151 
KU from LKS180 178 169 
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 years ended December 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.
 202020192018
PPL Electric from PPL Services$50 $59 $59 
LKE from PPL Services27 28 26 
PPL Electric from PPL EU Services176 152 148 
LG&E from LKS170 160 151 
KU from LKS180 178 169 
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 years ended December 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.
 202020192018
PPL Electric from PPL Services$50 $59 $59 
LKE from PPL Services27 28 26 
PPL Electric from PPL EU Services176 152 148 
LG&E from LKS170 160 151 
KU from LKS180 178 169