XML 368 R68.htm IDEA: XBRL DOCUMENT v3.20.1
Derivative Instruments and Hedging Activities - Gains and Losses (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Expense $ 248 $ 241
Other Income (Expense) - net 125 52
Cash Flow Hedges [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (Loss) Reclassified from AOCI into Income 3 (30)
Cash Flow Hedges [Member] | Other Comprehensive Income (Loss) [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Derivative Gain (Loss) Recognized in OCI 10 (23)
Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Other Comprehensive Income (Loss) [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Derivative Gain (Loss) Recognized in OCI (5) 0
Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Interest Expense [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (Loss) Reclassified from AOCI into Income (3) (2)
Amount of gain (loss) reclassified from AOCI to income (3)  
Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Other Income (Expense) Net [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Amount of gain (loss) reclassified from AOCI to income 0  
Cash Flow Hedges [Member] | Cross Currency Swaps [Member] | Other Comprehensive Income (Loss) [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Derivative Gain (Loss) Recognized in OCI 15 (23)
Cash Flow Hedges [Member] | Cross Currency Swaps [Member] | Interest Expense [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Amount of gain (loss) reclassified from AOCI to income 0  
Hedged items 0  
Cash Flow Hedges [Member] | Cross Currency Swaps [Member] | Other Income (Expense) Net [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (Loss) Reclassified from AOCI into Income 6 (28)
Amount of gain (loss) reclassified from AOCI to income 6  
Hedged items (6)  
Net Investment Hedges [Member] | Foreign Currency Contracts [Member] | Other Comprehensive Income (Loss) [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Derivative Gain (Loss) Recognized in OCI 0 0
Not Designated As Hedging Instruments [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized in income on derivative 61 (34)
Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Regulatory Assets Noncurrent [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized as regulatory liabilities/assets (8) (1)
Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Interest Expense [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized in income on derivative (1) (1)
Not Designated As Hedging Instruments [Member] | Foreign Currency Contracts [Member] | Other Income (Expense) Net [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized in income on derivative 62 (33)
LG And E And KU Energy LLC [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Expense 58 54
Louisville Gas And Electric Co [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Expense 22 21
Other Income (Expense) - net (1) 0
Louisville Gas And Electric Co [Member] | Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Regulatory Assets Noncurrent [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized as regulatory liabilities/assets (8) (1)
Louisville Gas And Electric Co [Member] | Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Interest Expense [Member]    
Amounts Included in Income, OCI or Regulatory Liabilities/Assets [Abstract]    
Gain (loss) recognized in income on derivative (1) (1)
Kentucky Utilities Co [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Expense 28 26
Other Income (Expense) - net $ 1 $ 2