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Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2019
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 
PPL
 
LKE
 
LG&E
 
KU
Balance at December 31, 2018
$
347

 
$
296

 
$
103

 
$
193

Accretion
4

 
4

 
2

 
2

Effect of foreign exchange rates
2

 
—

 
—

 
—

Changes in estimated timing or cost
8

 
8

 
8

 
—

Obligations settled
(21
)
 
(21
)
 
(4
)
 
(17
)
Balance at March 31, 2019
$
340

 
$
287

 
$
109

 
$
178
LG And E And KU Energy LLC [Member]  
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 
PPL
 
LKE
 
LG&E
 
KU
Balance at December 31, 2018
$
347

 
$
296

 
$
103

 
$
193

Accretion
4

 
4

 
2

 
2

Effect of foreign exchange rates
2

 
—

 
—

 
—

Changes in estimated timing or cost
8

 
8

 
8

 
—

Obligations settled
(21
)
 
(21
)
 
(4
)
 
(17
)
Balance at March 31, 2019
$
340

 
$
287

 
$
109

 
$
178
Louisville Gas And Electric Co [Member]  
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 
PPL
 
LKE
 
LG&E
 
KU
Balance at December 31, 2018
$
347

 
$
296

 
$
103

 
$
193

Accretion
4

 
4

 
2

 
2

Effect of foreign exchange rates
2

 
—

 
—

 
—

Changes in estimated timing or cost
8

 
8

 
8

 
—

Obligations settled
(21
)
 
(21
)
 
(4
)
 
(17
)
Balance at March 31, 2019
$
340

 
$
287

 
$
109

 
$
178
Kentucky Utilities Co [Member]  
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 
PPL
 
LKE
 
LG&E
 
KU
Balance at December 31, 2018
$
347

 
$
296

 
$
103

 
$
193

Accretion
4

 
4

 
2

 
2

Effect of foreign exchange rates
2

 
—

 
—

 
—

Changes in estimated timing or cost
8

 
8

 
8

 
—

Obligations settled
(21
)
 
(21
)
 
(4
)
 
(17
)
Balance at March 31, 2019
$
340

 
$
287

 
$
109

 
$
178