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Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 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 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 Months
 
Six Months
 
2017
 
2016
 
2017
 
2016
PPL Electric from PPL Services
$
44

 
$
28

 
$
95

 
$
65

LKE from PPL Services
5

 
4

 
11

 
9

PPL Electric from PPL EU Services
15

 
16

 
33

 
33

LG&E from LKS
38

 
41

 
82

 
88

KU from LKS
47

 
49

 
91

 
105
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 Months
 
Six Months
 
2017
 
2016
 
2017
 
2016
PPL Electric from PPL Services
$
44

 
$
28

 
$
95

 
$
65

LKE from PPL Services
5

 
4

 
11

 
9

PPL Electric from PPL EU Services
15

 
16

 
33

 
33

LG&E from LKS
38

 
41

 
82

 
88

KU from LKS
47

 
49

 
91

 
105
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 Months
 
Six Months
 
2017
 
2016
 
2017
 
2016
PPL Electric from PPL Services
$
44

 
$
28

 
$
95

 
$
65

LKE from PPL Services
5

 
4

 
11

 
9

PPL Electric from PPL EU Services
15

 
16

 
33

 
33

LG&E from LKS
38

 
41

 
82

 
88

KU from LKS
47

 
49

 
91

 
105
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 Months
 
Six Months
 
2017
 
2016
 
2017
 
2016
PPL Electric from PPL Services
$
44

 
$
28

 
$
95

 
$
65

LKE from PPL Services
5

 
4

 
11

 
9

PPL Electric from PPL EU Services
15

 
16

 
33

 
33

LG&E from LKS
38

 
41

 
82

 
88

KU from LKS
47

 
49

 
91

 
105