XML 100 R53.htm IDEA: XBRL DOCUMENT v3.8.0.1
Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2017
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
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
ARO at beginning of period
$
488

 
$
586

 
$
433

 
$
535

 
$
145

 
$
175

 
$
288

 
$
360

Accretion
21

 
24

 
20

 
22

 
7

 
7

 
13

 
15

Changes in estimated timing or cost (a)
(73
)
 
(84
)
 
(54
)
 
(95
)
 
(8
)
 
(19
)
 
(46
)
 
(76
)
Effect of foreign currency exchange rates
4

 
(9
)
 
—

 
—

 
—

 
—

 
—

 
—

Obligations settled
(43
)
 
(29
)
 
(43
)
 
(29
)
 
(23
)
 
(18
)
 
(20
)
 
(11
)
ARO at end of period
$
397

 
$
488

 
$
356

 
$
433

 
$
121

 
$
145

 
$
235

 
$
288
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
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
ARO at beginning of period
$
488

 
$
586

 
$
433

 
$
535

 
$
145

 
$
175

 
$
288

 
$
360

Accretion
21

 
24

 
20

 
22

 
7

 
7

 
13

 
15

Changes in estimated timing or cost (a)
(73
)
 
(84
)
 
(54
)
 
(95
)
 
(8
)
 
(19
)
 
(46
)
 
(76
)
Effect of foreign currency exchange rates
4

 
(9
)
 
—

 
—

 
—

 
—

 
—

 
—

Obligations settled
(43
)
 
(29
)
 
(43
)
 
(29
)
 
(23
)
 
(18
)
 
(20
)
 
(11
)
ARO at end of period
$
397

 
$
488

 
$
356

 
$
433

 
$
121

 
$
145

 
$
235

 
$
288
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
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
ARO at beginning of period
$
488

 
$
586

 
$
433

 
$
535

 
$
145

 
$
175

 
$
288

 
$
360

Accretion
21

 
24

 
20

 
22

 
7

 
7

 
13

 
15

Changes in estimated timing or cost (a)
(73
)
 
(84
)
 
(54
)
 
(95
)
 
(8
)
 
(19
)
 
(46
)
 
(76
)
Effect of foreign currency exchange rates
4

 
(9
)
 
—

 
—

 
—

 
—

 
—

 
—

Obligations settled
(43
)
 
(29
)
 
(43
)
 
(29
)
 
(23
)
 
(18
)
 
(20
)
 
(11
)
ARO at end of period
$
397

 
$
488

 
$
356

 
$
433

 
$
121

 
$
145

 
$
235

 
$
288
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
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
 
2017
 
2016
ARO at beginning of period
$
488

 
$
586

 
$
433

 
$
535

 
$
145

 
$
175

 
$
288

 
$
360

Accretion
21

 
24

 
20

 
22

 
7

 
7

 
13

 
15

Changes in estimated timing or cost (a)
(73
)
 
(84
)
 
(54
)
 
(95
)
 
(8
)
 
(19
)
 
(46
)
 
(76
)
Effect of foreign currency exchange rates
4

 
(9
)
 
—

 
—

 
—

 
—

 
—

 
—

Obligations settled
(43
)
 
(29
)
 
(43
)
 
(29
)
 
(23
)
 
(18
)
 
(20
)
 
(11
)
ARO at end of period
$
397

 
$
488

 
$
356

 
$
433

 
$
121

 
$
145

 
$
235

 
$
288