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Related Party Transactions (Tables)
 6 Months Ended
Jun. 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 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
 2020201920202019
PPL Electric from PPL Services
$14  $13  $26  $29  
LKE from PPL Services7  5  13  14  
PPL Electric from PPL EU Services41  37  82  74  
LG&E from LKS44  37  82  75  
KU from LKS46  41  87  84  
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 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
 2020201920202019
PPL Electric from PPL Services
$14  $13  $26  $29  
LKE from PPL Services7  5  13  14  
PPL Electric from PPL EU Services41  37  82  74  
LG&E from LKS44  37  82  75  
KU from LKS46  41  87  84  
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
 2020201920202019
PPL Electric from PPL Services
$14  $13  $26  $29  
LKE from PPL Services7  5  13  14  
PPL Electric from PPL EU Services41  37  82  74  
LG&E from LKS44  37  82  75  
KU from LKS46  41  87  84  
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
 2020201920202019
PPL Electric from PPL Services
$14  $13  $26  $29  
LKE from PPL Services7  5  13  14  
PPL Electric from PPL EU Services41  37  82  74  
LG&E from LKS44  37  82  75  
KU from LKS46  41  87  84