Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2017

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.  

	2017		2016		2015
PPL Electric from PPL Services	$	182	$	132	$	125
LKE from PPL Services	20		18		16
PPL Electric from PPL EU Services	64		69		60
LG&E from LKS	169		178		155
KU from LKS	190		194		185

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.  

	2017		2016		2015
PPL Electric from PPL Services	$	182	$	132	$	125
LKE from PPL Services	20		18		16
PPL Electric from PPL EU Services	64		69		60
LG&E from LKS	169		178		155
KU from LKS	190		194		185

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.  

	2017		2016		2015
PPL Electric from PPL Services	$	182	$	132	$	125
LKE from PPL Services	20		18		16
PPL Electric from PPL EU Services	64		69		60
LG&E from LKS	169		178		155
KU from LKS	190		194		185

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.  

	2017		2016		2015
PPL Electric from PPL Services	$	182	$	132	$	125
LKE from PPL Services	20		18		16
PPL Electric from PPL EU Services	64		69		60
LG&E from LKS	169		178		155
KU from LKS	190		194		185