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Derivative Instruments and Hedging Activities (Tables)
 12 Months Ended
Dec. 31, 2020
Derivative Instruments And Hedging Activities [Line Items]  
Fair Value and Balance Sheet Location of Derivative Instruments
The following table presents the fair value and location of derivative instruments recorded on the Balance Sheets:
 December 31, 2020December 31, 2019
Derivatives designated as
hedging instruments		Derivatives not designated
as hedging instruments		Derivatives designated as
hedging instruments		Derivatives not designated
as hedging instruments
 AssetsLiabilitiesAssetsLiabilitiesAssetsLiabilitiesAssetsLiabilities
Current:        
Price Risk Management        
Assets/Liabilities (a):        
Interest rate swaps (b)$— $— $— $2 $— $— $— $4 
Cross-currency swaps (b)94 — — — 5 — — — 
Foreign currency contracts— — — 137 — — 142 5 
Total current94 — — 139 5 — 142 9 
Noncurrent:        
Price Risk Management        
Assets/Liabilities (a):        
Interest rate swaps (b)— — — 21 — — — 17 
Cross-currency swaps (b)52 — — — 149 — — — 
Total noncurrent52 — — 21 149 — — 17 
Total derivatives$146 $— $— $160 $154 $— $142 $26 
(a)Current portion is included in "Price risk management assets" and "Other current liabilities" and noncurrent portion is included in "Price risk management assets" and "Other deferred credits and noncurrent liabilities" on the Balance Sheets.
(b)Excludes accrued interest, if applicable.
Pre-tax Gain (Loss) on Derivative Instruments Recognized in Income or on the Balance Sheet
The following tables present the pre-tax effect of derivative instruments recognized in income, OCI or regulatory assets and regulatory liabilities:
Derivative
Relationships		Derivative Gain
(Loss) Recognized in OCI		Location of Gain (Loss)
Recognized in Income
on Derivative		Gain (Loss) Reclassified
from AOCI into Income
2020
Cash Flow Hedges:
Interest rate swaps$(9)Interest Expense$(10)
Cross-currency swaps(15)Other Income (Expense) - net(22)
Total$(24)$(32)
Net Investment Hedges: 
Foreign currency contracts$1 
2019
Cash Flow Hedges:
Interest rate swaps$(30)Interest Expense$(9)
Cross-currency swaps17 Other Income (Expense) - net(9)
Total$(13)$(18)
Net Investment Hedges: 
Foreign currency contracts$2 
2018
Cash Flow Hedges:
Interest rate swaps$4 Interest Expense$(8)
Cross-currency swaps41 Other Income (Expense) - net42 
Interest Expense1 
Total$45 $35 
Net Investment Hedges: 
Foreign currency contracts$11 
Derivatives Not Designated as
Hedging Instruments		Location of Gain (Loss) Recognized in
Income on Derivative		202020192018
Foreign currency contractsOther Income (Expense) - net$(98)$(14)$150 
Interest rate swapsInterest Expense(5)(5)(5)
 Total$(103)$(19)$145 
Derivatives Not Designated as
Hedging Instruments		Location of Gain (Loss) Recognized as
Regulatory Liabilities/Assets		202020192018
Interest rate swapsRegulatory assets - noncurrent$(2)$(1)$6 

The following table presents the effect of cash flow hedge activity on the Statement of Income for the year ended December 31, 2020:
Location and Amount of Gain (Loss) Recognized in Income on Hedging Relationships
Interest ExpenseOther Income (Expense) - net
Total income and expense line items presented in the income statement in which the effect of cash flow hedges are recorded$1,001 $169 
The effects of cash flow hedges:
Gain (Loss) on cash flow hedging relationships:
Interest rate swaps:
Amount of gain (loss) reclassified from AOCI to income(10)— 
Cross-currency swaps:
Hedged items— 22 
Amount of gain (loss) reclassified from AOCI to income— (22)

The following table presents the effect of cash flow hedge activity on the Statement of Income for the year ended December 31, 2019:
Location and Amount of Gain (Loss) Recognized in Income on Hedging Relationships
Interest ExpenseOther Income (Expense) - net
Total income and expense line items presented in the income statement in which the effect of cash flow hedges are recorded$994 $309 
The effects of cash flow hedges:
Gain (Loss) on cash flow hedging relationships:
Interest rate swaps:
Amount of gain (loss) reclassified from AOCI to income(9)— 
Cross-currency swaps:
Hedged items— 9 
Amount of gain (loss) reclassified from AOCI to income— (9)
Derivative Positions Eligible for Offset with Related Cash Collateral The table below summarizes the derivative positions presented in the balance sheets where a right of setoff exists under these arrangements and related cash collateral received or pledged.
 AssetsLiabilities
  Eligible for Offset  Eligible for Offset 
 GrossDerivative
Instruments		Cash
Collateral
Received		NetGrossDerivative
Instruments		Cash
Collateral
Pledged		Net
December 31, 2020        
Treasury Derivatives        
PPL$146 $34 $— $112 $160 $34 $— $126 
LKE— — — — 23 — — 23 
LG&E— — — — 23 — — 23 
December 31, 2019        
Treasury Derivatives        
PPL$296 $5 $14 $277 $26 $5 $— $21 
LKE— — — — 21 — — 21 
LG&E— — — — 21 — — 21 
Credit Risk-Related Contingent Features At December 31, 2020, derivative contracts in a net liability position that contain credit risk-related contingent features, collateral posted on those positions and the related effect of a decrease in credit ratings below investment grade are summarized as follows:
PPL
Aggregate fair value of derivative instruments in a net liability position with credit risk-related contingent features$102 
Aggregate fair value of collateral posted on these derivative instruments— 
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade (a)102 

(a)Includes the effect of net receivables and payables already recorded on the Balance Sheet.
LG And E And KU Energy LLC [Member]  
Derivative Instruments And Hedging Activities [Line Items]  
Fair Value and Balance Sheet Location of Derivative Instruments
The following table presents the fair value and the location on the Balance Sheets of derivatives not designated as hedging instruments:
 December 31, 2020December 31, 2019
 AssetsLiabilitiesAssetsLiabilities
Current:    
Price Risk Management    
Assets/Liabilities:    
Interest rate swaps$— $2 $— $4 
Total current— 2 — 4 
Noncurrent:    
Price Risk Management    
Assets/Liabilities:    
Interest rate swaps— 21 — 17 
Total noncurrent— 21 — 17 
Total derivatives$— $23 $— $21 
Pre-tax Gain (Loss) on Derivative Instruments Recognized in Income or on the Balance Sheet
The following tables present the pre-tax effect of derivatives not designated as cash flow hedges that are recognized in income or regulatory assets:
Derivative InstrumentsLocation of Gain (Loss)202020192018
Interest rate swapsInterest Expense$(5)$(5)$(5)
Derivative InstrumentsLocation of Gain (Loss)202020192018
Interest rate swapsRegulatory assets - noncurrent$(2)$(1)$6 
Derivative Positions Eligible for Offset with Related Cash Collateral The table below summarizes the derivative positions presented in the balance sheets where a right of setoff exists under these arrangements and related cash collateral received or pledged.
 AssetsLiabilities
  Eligible for Offset  Eligible for Offset 
 GrossDerivative
Instruments		Cash
Collateral
Received		NetGrossDerivative
Instruments		Cash
Collateral
Pledged		Net
December 31, 2020        
Treasury Derivatives        
PPL$146 $34 $— $112 $160 $34 $— $126 
LKE— — — — 23 — — 23 
LG&E— — — — 23 — — 23 
December 31, 2019        
Treasury Derivatives        
PPL$296 $5 $14 $277 $26 $5 $— $21 
LKE— — — — 21 — — 21 
LG&E— — — — 21 — — 21 
Credit Risk-Related Contingent Features At December 31, 2020, derivative contracts in a net liability position that contain credit risk-related contingent features, collateral posted on those positions and the related effect of a decrease in credit ratings below investment grade are summarized as follows:
PPL
Aggregate fair value of derivative instruments in a net liability position with credit risk-related contingent features$102 
Aggregate fair value of collateral posted on these derivative instruments— 
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade (a)102 

(a)Includes the effect of net receivables and payables already recorded on the Balance Sheet.
Louisville Gas And Electric Co [Member]  
Derivative Instruments And Hedging Activities [Line Items]  
Fair Value and Balance Sheet Location of Derivative Instruments
The following table presents the fair value and the location on the Balance Sheets of derivatives not designated as hedging instruments:
 December 31, 2020December 31, 2019
 AssetsLiabilitiesAssetsLiabilities
Current:    
Price Risk Management    
Assets/Liabilities:    
Interest rate swaps$— $2 $— $4 
Total current— 2 — 4 
Noncurrent:    
Price Risk Management    
Assets/Liabilities:    
Interest rate swaps— 21 — 17 
Total noncurrent— 21 — 17 
Total derivatives$— $23 $— $21 
Pre-tax Gain (Loss) on Derivative Instruments Recognized in Income or on the Balance Sheet
The following tables present the pre-tax effect of derivatives not designated as cash flow hedges that are recognized in income or regulatory assets:
Derivative InstrumentsLocation of Gain (Loss)202020192018
Interest rate swapsInterest Expense$(5)$(5)$(5)
Derivative InstrumentsLocation of Gain (Loss)202020192018
Interest rate swapsRegulatory assets - noncurrent$(2)$(1)$6 
Derivative Positions Eligible for Offset with Related Cash Collateral The table below summarizes the derivative positions presented in the balance sheets where a right of setoff exists under these arrangements and related cash collateral received or pledged.
 AssetsLiabilities
  Eligible for Offset  Eligible for Offset 
 GrossDerivative
Instruments		Cash
Collateral
Received		NetGrossDerivative
Instruments		Cash
Collateral
Pledged		Net
December 31, 2020        
Treasury Derivatives        
PPL$146 $34 $— $112 $160 $34 $— $126 
LKE— — — — 23 — — 23 
LG&E— — — — 23 — — 23 
December 31, 2019        
Treasury Derivatives        
PPL$296 $5 $14 $277 $26 $5 $— $21 
LKE— — — — 21 — — 21 
LG&E— — — — 21 — — 21 
Credit Risk-Related Contingent Features At December 31, 2020, derivative contracts in a net liability position that contain credit risk-related contingent features, collateral posted on those positions and the related effect of a decrease in credit ratings below investment grade are summarized as follows:
PPL
Aggregate fair value of derivative instruments in a net liability position with credit risk-related contingent features$102 
Aggregate fair value of collateral posted on these derivative instruments— 
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade (a)102 

(a)Includes the effect of net receivables and payables already recorded on the Balance Sheet.
Kentucky Utilities Co [Member]  
Derivative Instruments And Hedging Activities [Line Items]  
Derivative Positions Eligible for Offset with Related Cash Collateral The table below summarizes the derivative positions presented in the balance sheets where a right of setoff exists under these arrangements and related cash collateral received or pledged.
 AssetsLiabilities
  Eligible for Offset  Eligible for Offset 
 GrossDerivative
Instruments		Cash
Collateral
Received		NetGrossDerivative
Instruments		Cash
Collateral
Pledged		Net
December 31, 2020        
Treasury Derivatives        
PPL$146 $34 $— $112 $160 $34 $— $126 
LKE— — — — 23 — — 23 
LG&E— — — — 23 — — 23 
December 31, 2019        
Treasury Derivatives        
PPL$296 $5 $14 $277 $26 $5 $— $21 
LKE— — — — 21 — — 21 
LG&E— — — — 21 — — 21