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v3.19.3.a.u2

Related Party Transactions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
PPL Electric Utilities Corp [Member] | PPL Services [Member] |  |  |
Related Party Transactions [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | $ 59 | $ 59 | $ 182
Intercompany Borrowings (Numeric) [Abstract] |  |  |
VEBA Funds Receivable | 32 |  |
PPL Electric Utilities Corp [Member] | PPL Services [Member] | Accounts receivable from affiliates [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
VEBA Funds Receivable | 10 |  |
PPL Electric Utilities Corp [Member] | PPL Services [Member] | Other Noncurrent Assets [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
VEBA Funds Receivable | 22 |  |
PPL Electric Utilities Corp [Member] | PPL EU Services [Member] |  |  |
Related Party Transactions [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | 152 | 148 | 64
PPL Electric Utilities Corp [Member] | PPL Energy Funding [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Intercompany note with affiliate maximum borrowing capacity | 650 |  |
Notes Receivable, Related Parties, Current | 0 | 0 |
LG And E And KU Energy LLC [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Notes payable to affiliates | 150 | 113 |
Interest Expense, Related Party | 31 | 25 | 18
Long-term debt to affiliate | 650 | 650 |
LG And E And KU Energy LLC [Member] | PPL Services [Member] |  |  |
Related Party Transactions [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | 28 | 26 | 20
LG And E And KU Energy LLC [Member] | PPL Energy Funding [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Intercompany note with affiliate maximum borrowing capacity | 375 |  |
Notes payable to affiliates | $ 150 | $ 113 |
Intercompany borrowings demand note rate on outstanding borrowing | 3.20% | 3.85% |
LG And E And KU Energy LLC [Member] | Affiliated Entity [Member] | Note Payable [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Intercompany borrowings demand note rate on outstanding borrowing | 3.50% |  |
Interest Expense, Related Party | $ 14 |  |
Long-term debt to affiliate | $ 400 |  |
LG And E And KU Energy LLC [Member] | Affiliated Entity [Member] | Note Payable 1 [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Intercompany borrowings demand note rate on outstanding borrowing | 4.00% |  |
Interest Expense, Related Party | $ 10 | $ 7 |
Long-term debt to affiliate | $ 250 |  |
LG And E And KU Energy LLC [Member] | Company Affiliate1 [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Debt Instrument, Term | 10 years |  |
Interest Expense, Related Party |  | 14 | 14
LG And E And KU Energy LLC [Member] | PPL Affiliate [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Intercompany note with affiliate maximum borrowing capacity | $ 300 |  |
Long-term debt to affiliate | 0 | 0 |
Louisville Gas And Electric Co [Member] | Parent And Affiliate [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Notes payable to affiliates | 0 | 0 |
Intercompany Money Pool Agreement Maximum Borrowing Capacity | 500 |  |
Louisville Gas And Electric Co [Member] | LKS [Member] |  |  |
Related Party Transactions [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | 160 | 151 | 169
Kentucky Utilities Co [Member] | Parent And Affiliate [Member] |  |  |
Intercompany Borrowings (Numeric) [Abstract] |  |  |
Notes payable to affiliates | 0 | 0 |
Intercompany Money Pool Agreement Maximum Borrowing Capacity | 500 |  |
Kentucky Utilities Co [Member] | LKS [Member] |  |  |
Related Party Transactions [Line Items] |  |  |
Related Party Transaction, Amounts of Transaction | $ 178 | $ 169 | $ 190

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