XML 428 R45.htm IDEA: XBRL DOCUMENT v3.20.1
Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2021
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues $ 2,054 $ 2,079      
Alternative Revenue Programs (3) (6)      
Other Revenue (10) (10)      
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 2,041 2,063      
Contract with Customer, Asset and Liability [Abstract]          
Accounts Receivable, Credit Loss Expense (Reversal) 8 9      
Contract with Customer, Liability 42 37   $ 44 $ 42
Contract with Customer, Liability, Revenue Recognized 23 25      
Licensed energy suppliers [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 583 556      
Residential [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 714 778      
Commercial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 312 319      
Industrial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 144 150      
Other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 116 114      
Wholesale - municipal [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 5 28      
Wholesale - other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 8 13      
Transmission [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 159 105      
Pennsylvania Regulated [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 608 645      
United Kingdom Regulated [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 614 583      
Kentucky Regulated [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 825 845      
Corporate and Other [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 7 6      
Corporate and Other [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-03-31          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount 32        
Corporate and Other [Member] | Forecast [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-03-31          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Revenue, Remaining Performance Obligation, Amount     $ 28    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period     12 months    
PPL Electric Utilities Corp [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 608 645      
Alternative Revenue Programs 0 (4)      
Other Revenue (2) (3)      
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 606 638      
Contract with Customer, Asset and Liability [Abstract]          
Accounts Receivable, Credit Loss Expense (Reversal) 4 6      
Contract with Customer, Liability 15 14   21 23
Contract with Customer, Liability, Revenue Recognized 8 11      
PPL Electric Utilities Corp [Member] | Licensed energy suppliers [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
PPL Electric Utilities Corp [Member] | Residential [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 344 407      
PPL Electric Utilities Corp [Member] | Commercial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 81 95      
PPL Electric Utilities Corp [Member] | Industrial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 8 17      
PPL Electric Utilities Corp [Member] | Other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 14 14      
PPL Electric Utilities Corp [Member] | Wholesale - municipal [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
PPL Electric Utilities Corp [Member] | Wholesale - other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
PPL Electric Utilities Corp [Member] | Distribution [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 447 533      
PPL Electric Utilities Corp [Member] | Transmission [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 159 105      
LG And E And KU Energy LLC [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 825 845      
Alternative Revenue Programs (3) (2)      
Other Revenue (6) (4)      
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 816 839      
Contract with Customer, Asset and Liability [Abstract]          
Accounts Receivable, Credit Loss Expense (Reversal) 2 2      
Contract with Customer, Liability 14 7   9 9
Contract with Customer, Liability, Revenue Recognized 9 9      
LG And E And KU Energy LLC [Member] | Licensed energy suppliers [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
LG And E And KU Energy LLC [Member] | Residential [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 370 371      
LG And E And KU Energy LLC [Member] | Commercial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 231 224      
LG And E And KU Energy LLC [Member] | Industrial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 136 133      
LG And E And KU Energy LLC [Member] | Other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 66 70      
LG And E And KU Energy LLC [Member] | Wholesale - municipal [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 5 28      
LG And E And KU Energy LLC [Member] | Wholesale - other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 8 13      
LG And E And KU Energy LLC [Member] | Transmission [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
Louisville Gas And Electric Co [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 407 410      
Alternative Revenue Programs (3) (2)      
Other Revenue (3) (1)      
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 401 407      
Contract with Customer, Asset and Liability [Abstract]          
Accounts Receivable, Credit Loss Expense (Reversal) 1 1      
Contract with Customer, Liability 10 4   5 5
Contract with Customer, Liability, Revenue Recognized 5 5      
Louisville Gas And Electric Co [Member] | Licensed energy suppliers [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
Louisville Gas And Electric Co [Member] | Residential [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 187 189      
Louisville Gas And Electric Co [Member] | Commercial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 124 121      
Louisville Gas And Electric Co [Member] | Industrial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 45 44      
Louisville Gas And Electric Co [Member] | Other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 28 33      
Louisville Gas And Electric Co [Member] | Wholesale - municipal [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
Louisville Gas And Electric Co [Member] | Wholesale - other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 17 20      
Louisville Gas And Electric Co [Member] | Transmission [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
Kentucky Utilities Co [Member]          
Reconciliation of Revenue from Contracts with Customers [Abstract]          
Operating Revenues 432 450      
Alternative Revenue Programs 0 0      
Other Revenue (3) (3)      
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 429 447      
Contract with Customer, Asset and Liability [Abstract]          
Accounts Receivable, Credit Loss Expense (Reversal) 1 1      
Contract with Customer, Liability 4 3   $ 4 $ 4
Contract with Customer, Liability, Revenue Recognized 4 4      
Kentucky Utilities Co [Member] | Licensed energy suppliers [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 0 0      
Kentucky Utilities Co [Member] | Residential [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 183 182      
Kentucky Utilities Co [Member] | Commercial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 107 103      
Kentucky Utilities Co [Member] | Industrial [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 91 89      
Kentucky Utilities Co [Member] | Other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 38 37      
Kentucky Utilities Co [Member] | Wholesale - municipal [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 5 28      
Kentucky Utilities Co [Member] | Wholesale - other [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers 5 8      
Kentucky Utilities Co [Member] | Transmission [Member]          
Disaggregation of Revenue [Abstract]          
Revenues from Contracts with Customers $ 0 $ 0