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Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2016
Goodwill and Other Intangible Assets [Line Items]  
Goodwill Rollforward
The changes in the carrying amount of goodwill by segment were:
 
U.K. Regulated
 
Kentucky Regulated
 
Total
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Balance at beginning of period (a)
$
2,888

 
$
3,005

 
$
662

 
$
662

 
$
3,550

 
$
3,667

Effect of foreign currency exchange rates
(490
)
 
(117
)
 
 

 
 

 
(490
)
 
(117
)
Balance at end of period (a)
$
2,398

 
$
2,888

 
$
662

 
$
662

 
$
3,060

 
$
3,550

 
(a)
There were no accumulated impairment losses related to goodwill.
Other Intangible Assets
The gross carrying amount and the accumulated amortization of other intangible assets were:
 
December 31, 2016
 
December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Subject to amortization:
 
 
 
 
 
 
 
Contracts (a)
$
405

 
$
325

 
$
407

 
$
300

Land and transmission rights
362

 
115

 
337

 
111

Emission allowances/RECs (b)
2

 

 
5

 

Licenses and other
6

 
2

 
10

 
5

Total subject to amortization
775

 
442

 
759

 
416

 
 
 
 
 
 
 
 
Not subject to amortization due to indefinite life:
 
 
 
 
 
 
 
Land and transmission rights
19

 

 
33

 

Easements (c)
348

 

 
303

 

Total not subject to amortization due to indefinite life
367

 

 
336

 

Total
$
1,142

 
$
442

 
$
1,095

 
$
416

 
(a)
Gross carrying amount includes the fair value at the acquisition date of the OVEC power purchase contract and coal contracts with terms favorable to market recognized as a result of the 2010 acquisition of LKE by PPL. Offsetting regulatory liabilities were recorded related to these contracts, which are being amortized over the same period as the intangible assets, eliminating any income statement impact. This is referred to as "regulatory offset" in the tables below. See Note 6 for additional information.
(b)
Emission allowances/RECs are expensed when consumed or sold; therefore, there is no accumulated amortization.
(c)
The increase during 2016 was primarily from increases at WPD.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization Expense was as follows:
 
 
 
 
 
 
2016
 
2015
 
2014
Intangible assets with no regulatory offset
$
6

 
$
6

 
$
6

Intangible assets with regulatory offset
24

 
51

 
47

Total
$
30

 
$
57

 
$
53

Future Amortization Expense
Amortization expense for each of the next five years, excluding insignificant amounts for consumption of emission allowances/RECs, is estimated to be:
 
2017
 
2018
 
2019
 
2020
 
2021
Intangible assets with no regulatory offset
$
6

 
$
6

 
$
6

 
$
6

 
$
6

Intangible assets with regulatory offset
9

 
9

 
9

 
8

 
8

Total
$
15

 
$
15

 
$
15

 
$
14

 
$
14

PPL Electric Utilities Corp [Member]  
Goodwill and Other Intangible Assets [Line Items]  
Other Intangible Assets
The gross carrying amount and the accumulated amortization of other intangible assets were:
 
December 31, 2016
 
December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Subject to amortization:
 
 
 
 
 
 
 
Land and transmission rights
$
341

 
$
112

 
$
316

 
$
108

Licenses and other
3

 
1

 
4

 
1

Total subject to amortization
344

 
113

 
320

 
109

 
 
 
 
 
 
 
 
Not subject to amortization due to indefinite life:
 
 
 
 
 
 
 
Land and transmission rights
20

 

 
33

 

Total
$
364

 
$
113

 
$
353

 
$
109

LG And E And KU Energy LLC [Member]  
Goodwill and Other Intangible Assets [Line Items]  
Other Intangible Assets
The gross carrying amount and the accumulated amortization of other intangible assets were:
 
December 31, 2016
 
December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Subject to amortization:
 
 
 
 
 
 
 
Coal contracts (a)
$
269

 
$
269

 
$
269

 
$
252

Land and transmission rights
21

 
3

 
21

 
2

Emission allowances (b)

 

 
3

 

OVEC power purchase agreement (c)
126

 
49

 
126

 
42

Total subject to amortization
$
416

 
$
321

 
$
419

 
$
296

 
(a)
Gross carrying amount represents the fair value at the acquisition date of coal contracts with terms favorable to market recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to these contracts, which was amortized over the same period as the intangible assets, eliminating any income statement impact. See Note 6 for additional information.
(b)
Emission allowances are expensed when consumed or sold; therefore, there is no accumulated amortization.
(c)
Gross carrying amount represents the fair value at the acquisition date of the OVEC power purchase contract recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to this contract, which is being amortized over the same period as the intangible asset, eliminating any income statement impact. See Note 6 for additional information.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 
2016
 
2015
 
2014
Intangible assets with no regulatory offset
$
1

 
$

 
$

Intangible assets with regulatory offset
24

 
51

 
47

Total
$
25

 
$
51

 
$
47

Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 
2017
 
2018
 
2019
 
2020
 
2021
Intangible assets with regulatory offset
$
9

 
$
9

 
$
9

 
$
8

 
$
8

Louisville Gas And Electric Co [Member]  
Goodwill and Other Intangible Assets [Line Items]  
Other Intangible Assets
The gross carrying amount and the accumulated amortization of other intangible assets were:
 
December 31, 2016
 
December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Subject to amortization:
 
 
 
 
 
 
 
Coal contracts (a)
$
124

 
$
124

 
$
124

 
$
116

Land and transmission rights
7

 
1

 
7

 
1

Emission allowances (b)

 

 
1

 

OVEC power purchase agreement (c)
87

 
34

 
87

 
29

Total subject to amortization
$
218

 
$
159

 
$
219

 
$
146

 
(a)
Gross carrying amount represents the fair value at the acquisition date of coal contracts with terms favorable to market recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to these contracts, which was amortized over the same period as the intangible assets, eliminating any income statement impact. See Note 6 for additional information.
(b)
Emission allowances are expensed when consumed or sold; therefore, there is no accumulated amortization.
(c)
Gross carrying amount represents the fair value at the acquisition date of the OVEC power purchase contract recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to this contract, which is being amortized over the same period as the intangible asset, eliminating any income statement impact. See Note 6 for additional information.

Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 
2016
 
2015
 
2014
Intangible assets with regulatory offset
$
13

 
$
24

 
$
23

Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 
2017
 
2018
 
2019
 
2020
 
2021
Intangible assets with regulatory offset
$
6

 
$
6

 
$
6

 
$
6

 
$
6

Kentucky Utilities Co [Member]  
Goodwill and Other Intangible Assets [Line Items]  
Other Intangible Assets
The gross carrying amount and the accumulated amortization of other intangible assets were:
 
December 31, 2016
 
December 31, 2015
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Subject to amortization:
 
 
 
 
 
 
 
Coal contracts (a)
$
145

 
$
145

 
$
145

 
$
136

Land and transmission rights
14

 
2

 
14

 
1

Emission allowances (b)

 

 
2

 

OVEC power purchase agreement (c)
39

 
15

 
39

 
13

Total subject to amortization
$
198

 
$
162

 
$
200

 
$
150


(a)
Gross carrying amount represents the fair value at the acquisition date of coal contracts with terms favorable to market recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to these contracts, which was amortized over the same period as the intangible assets, eliminating any income statement impact. See Note 6 for additional information.
(b)
Emission allowances are expensed when consumed or sold; therefore, there is no accumulated amortization.
(c)
Gross carrying amount represents the fair value at the acquisition date of the OVEC power purchase contract recognized as a result of the 2010 acquisition by PPL. An offsetting regulatory liability was recorded related to this contract, which is being amortized over the same period as the intangible asset, eliminating any income statement impact. See Note 6 for additional information.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 
2016
 
2015
 
2014
Intangible assets with no regulatory offset
$
1

 
$

 
$

Intangible assets with regulatory offset
11

 
27

 
24

Total
$
12

 
$
27

 
$
24

Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 
2017
 
2018
 
2019
 
2020
 
2021
Intangible assets with regulatory offset
$
3

 
$
3

 
$
3

 
$
2

 
$
2