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Asset Retirement Obligations (Tables)
 6 Months Ended
Jun. 30, 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
8

 
7

 
2

 
5

Effect of foreign exchange rates
(1
)
 
—

 
—

 
—

Changes in estimated timing or cost
(6
)
 
(3
)
 
(4
)
 
1

Obligations settled
(45
)
 
(45
)
 
(12
)
 
(33
)
Balance at June 30, 2019
$
303

 
$
255

 
$
89

 
$
166
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
8

 
7

 
2

 
5

Effect of foreign exchange rates
(1
)
 
—

 
—

 
—

Changes in estimated timing or cost
(6
)
 
(3
)
 
(4
)
 
1

Obligations settled
(45
)
 
(45
)
 
(12
)
 
(33
)
Balance at June 30, 2019
$
303

 
$
255

 
$
89

 
$
166
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
8

 
7

 
2

 
5

Effect of foreign exchange rates
(1
)
 
—

 
—

 
—

Changes in estimated timing or cost
(6
)
 
(3
)
 
(4
)
 
1

Obligations settled
(45
)
 
(45
)
 
(12
)
 
(33
)
Balance at June 30, 2019
$
303

 
$
255

 
$
89

 
$
166
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
8

 
7

 
2

 
5

Effect of foreign exchange rates
(1
)
 
—

 
—

 
—

Changes in estimated timing or cost
(6
)
 
(3
)
 
(4
)
 
1

Obligations settled
(45
)
 
(45
)
 
(12
)
 
(33
)
Balance at June 30, 2019
$
303

 
$
255

 
$
89

 
$
166