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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2020
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		Corporate and
Other		Total
 
 20202019202020192020201920202019
Balance at beginning of period (a)$2,483 $2,447 $662 $662 $53 $53 $3,198 $3,162 
Effect of foreign currency exchange rates76 34 — — — — 76 34 
Other— 2 — — — — — 2 
Balance at end of period (a)$2,559 $2,483 $662 $662 $53 $53 $3,274 $3,198 

(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, 2020December 31, 2019
 Gross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Subject to amortization:    
Contracts (a)$136 $93 $136 $84 
Land rights and easements460 142 440 135 
Licenses and other21 4 22 3 
Total subject to amortization617 239 598 222 
Not subject to amortization due to indefinite life:    
Land rights and easements380 — 361 — 
Other6 — 6 — 
Total not subject to amortization due to indefinite life386 — 367 — 
Total$1,003 $239 $965 $222 

(a)Gross carrying amount in 2020 and 2019 includes the fair value at the acquisition date of the OVEC power purchase contract with terms favorable to market recognized as a result of the 2010 acquisition of LKE by PPL.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:   
 202020192018
Intangible assets with no regulatory offset$11 $9 $7 
Intangible assets with regulatory offset8 9 8 
Total$19 $18 $15 
Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 20212022202320242025
Intangible assets with no regulatory offset$11 $11 $11 $11 $11 
Intangible assets with regulatory offset8 8 8 8 8 
Total$19 $19 $19 $19 $19 
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, 2020December 31, 2019
 Gross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Subject to amortization:    
Land rights and easements$379 $129 $370 $125 
Licenses and other2 1 3 1 
Total subject to amortization381 130 373 126 
Not subject to amortization due to indefinite life:    
Land rights and easements17 — 17 — 
Total$398 $130 $390 $126 
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 202020192018
Intangible assets with no regulatory offset$4 $4 $4 
Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 20212022202320242025
Intangible assets with no regulatory offset$4 $4 $4 $4 $4 
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, 2020December 31, 2019
 Gross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Subject to amortization:    
Land rights and easements$22 $4 $22 $4 
OVEC power purchase agreement (a)125 82 125 74 
Total subject to amortization$147 $86 $147 $78 

(a)    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 7 for additional information.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 202020192018
Intangible assets with regulatory offset$8 $9 $8 
Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 20212022202320242025
Intangible assets with regulatory offset$8 $8 $8 $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, 2020December 31, 2019
 Gross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Subject to amortization:    
Land rights and easements$7 $1 $7 $1 
OVEC power purchase agreement (a)86 57 86 51 
Total subject to amortization$93 $58 $93 $52 

(a)    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 7 for additional information.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 202020192018
Intangible assets with regulatory offset$6 $6 $6 
Future Amortization Expense
Amortization expense for each of the next five years is estimated to be:
 20212022202320242025
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, 2020December 31, 2019
 Gross
Carrying
Amount		Accumulated
Amortization		Gross
Carrying
Amount		Accumulated
Amortization
Subject to amortization:    
Land rights and easements$15 $3 $15 $3 
OVEC power purchase agreement (a)39 25 39 23 
Total subject to amortization$54 $28 $54 $26 

(a)    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 7 for additional information.
Amortization Expense, Excluding Consumption of Emission Allowances / Renewable Energy Credits
Amortization expense was as follows:
 202020192018
Intangible assets with regulatory offset$2 $3 $2 
Future Amortization Expense Amortization expense for each of the next five years is estimated to be:
 20212022202320242025
Intangible assets with regulatory offset$2 $2 $2 $2 $2