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Financing Activities - Long-term Debt (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Feb. 28, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | $ 14,775 |  |  | $ 14,775 | $ 13,353 |
Unamortized premium and (discount), net |  | (55) |  |  | (55) | (32) |
Unamortized debt issuance costs |  | (108) |  |  | (108) | (78) |
Total Long-term Debt |  | 14,612 |  |  | 14,612 | 13,243 |
Less current portion of Long-term debt |  | 1 |  |  | 1 | 354 |
Long-term Debt |  | 14,611 |  |  | 14,611 | 12,889 |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 |  | 1 |  |  | 1 |  |
2023 |  | 551 |  |  | 551 |  |
2024 |  | 904 |  |  | 904 |  |
2025 |  | 428 |  |  | 428 |  |
2026 |  | 1,350 |  |  | 1,350 |  |
Thereafter |  | $ 11,541 |  |  | 11,541 |  |
Loss on Extinguishment of Debt |  |  |  |  | $ 0 | 0 | $ (395)
Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 3.95% |  |  | 3.95% |  |
Principal outstanding |  | $ 3,066 |  |  | $ 3,066 | 3,066 |
Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 4.35% |  |  | 4.35% |  |
Principal outstanding |  | $ 10,229 |  |  | $ 10,229 | 8,957 |
Junior Subordinated Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 8.27% |  |  | 8.27% |  |
Principal outstanding |  | $ 480 |  |  | $ 480 | 480 |
Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | 0 |  |  | 0 | 850 |
First Mortgage Bonds [Member] | Tax Exempt Revenue Bonds [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a term rate mode |  | $ 894 |  |  | $ 894 |  |
Exchangeable Senior Unsecured Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 2.88% |  |  | 2.88% |  |
Principal outstanding |  | $ 1,000 |  |  | $ 1,000 | 0 |
Exchangeable Senior Unsecured Notes | Exchangeable Senior Notes Due 2028 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  |  | $ 1,000 |  |  |
Stated interest rate |  |  |  | 2.875% |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Exchangeable Senior Notes Initial Exchange Rate, Dollars per Share |  |  |  | $ 34.08 |  |  |
Exchangeable Senior Notes Initial Exchange Rate, Shares per $1000 Principal Amount |  |  |  | 29.3432 |  |  |
Proceeds from Convertible Debt |  |  |  | $ 980 |  |  |
PPL Capital Funding [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 1,450 |  |  | 1,450 |  |
PPL Electric [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 650 |  |  | 650 |  |
PPL Electric [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 0 |  |  | 0 |  |
PPL Electric [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | $ 250 |  |  |  |
PPL Electric [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 12,400 |  |  | 12,400 | 11,800 |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds, Floating Rate Series due 2023 [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | 250 |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds, Floating Rate Series due 2024 | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | 650 |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds due 2034 | Subsequent Event [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount | $ 650 |  |  |  |  |  |
Stated interest rate | 4.85% |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond | $ 644 |  |  |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2053 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 750 |  |  |  |
Stated interest rate |  |  | 5.25% |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 600 |  |  |  |
Stated interest rate |  |  | 5.00% |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 and 2053 |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 1,320 |  |  |  |
LGE [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 500 |  |  | 500 |  |
LGE [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 0 |  |  | 0 |  |
LGE [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | 300 |  |  |  |
LGE [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 5,900 |  |  | $ 5,900 | 5,800 |
LGE [Member] | First Mortgage Bonds [Member] | Tax Exempt Revenue Bonds [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  | 1 year |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  | 66 |  |  | $ 66 |  |
LGE [Member] | First Mortgage Bonds [Member] | Environmental Facilities Revenue Bonds Due 2054 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  | $ 65 |  |  | $ 65 |  |
Stated interest rate |  | 4.70% |  |  | 4.70% |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  | $ 40 |  |  |  |  |
Restricted Cash |  | 25 |  |  | $ 25 |  |
LGE [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |
Stated interest rate |  |  | 5.45% |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 396 |  |  |  |
KU [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 400 |  |  | 400 |  |
KU [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 0 |  |  | 0 |  |
KU [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | 300 |  |  |  |
KU [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 7,300 |  |  | $ 7,300 | 7,100 |
KU [Member] | First Mortgage Bonds [Member] | Tax Exempt Revenue Bonds [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  | 1 year |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  | 33 |  |  | $ 33 |  |
KU [Member] | First Mortgage Bonds [Member] | Environmental Facilities Revenue Bonds Due 2054 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  | $ 60 |  |  | $ 60 |  |
Stated interest rate |  | 4.70% |  |  | 4.70% |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  | $ 37 |  |  |  |  |
Restricted Cash |  | 23 |  |  | $ 23 |  |
KU [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |
Stated interest rate |  |  | 5.45% |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 396 |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | 4,649 |  |  | 4,649 | 4,539 |
Unamortized discount |  | (42) |  |  | (42) | (22) |
Unamortized debt issuance costs |  | (40) |  |  | (40) | (31) |
Total Long-term Debt |  | 4,567 |  |  | 4,567 | 4,486 |
Less current portion of Long-term debt |  | 0 |  |  | 0 | 340 |
Long-term Debt |  | 4,567 |  |  | 4,567 | 4,146 |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 |  | 0 |  |  | 0 |  |
2023 |  | 0 |  |  | 0 |  |
2024 |  | 0 |  |  | 0 |  |
2025 |  | 108 |  |  | 108 |  |
2026 |  | 0 |  |  | 0 |  |
Thereafter |  | 4,541 |  |  | 4,541 |  |
Capacity |  | 650 |  |  | 650 |  |
PPL Electric Utilities Corp [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | $ 0 |  |  | $ 0 |  |
PPL Electric Utilities Corp [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | 250 |  |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 4.61% |  |  | 4.61% |  |
Principal outstanding |  | $ 4,649 |  |  | $ 4,649 | 4,289 |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 12,400 |  |  | 12,400 | 11,800 |
PPL Electric Utilities Corp [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | 0 |  |  | 0 | 250 |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds, Floating Rate Series due 2023 [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | 250 |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds, Floating Rate Series due 2024 | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | 650 |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds due 2034 | Subsequent Event [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount | $ 650 |  |  |  |  |  |
Stated interest rate | 4.85% |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond | $ 644 |  |  |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2053 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 750 |  |  |  |
Stated interest rate |  |  | 5.25% |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 600 |  |  |  |
Stated interest rate |  |  | 5.00% |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 and 2053 |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 1,320 |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | 2,489 |  |  | 2,489 | 2,324 |
Unamortized discount |  | (4) |  |  | (4) | (4) |
Unamortized debt issuance costs |  | (16) |  |  | (16) | (13) |
Total Long-term Debt |  | 2,469 |  |  | 2,469 | 2,307 |
Less current portion of Long-term debt |  | 0 |  |  | 0 | 0 |
Long-term Debt |  | 2,469 |  |  | 2,469 | 2,307 |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 |  | 0 |  |  | 0 |  |
2023 |  | 300 |  |  | 300 |  |
2024 |  | 90 |  |  | 90 |  |
2025 |  | 260 |  |  | 260 |  |
2026 |  | 0 |  |  | 0 |  |
Thereafter |  | 1,839 |  |  | 1,839 |  |
Capacity |  | 500 |  |  | 500 |  |
Louisville Gas And Electric Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 0 |  |  | 0 |  |
Louisville Gas And Electric Co [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | 300 |  |  |  |
Louisville Gas And Electric Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | $ 0 |  |  | $ 0 | 300 |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 4.02% |  |  | 4.02% |  |
Principal outstanding |  | $ 2,489 |  |  | $ 2,489 | 2,024 |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 5,900 |  |  | $ 5,900 | 5,800 |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] | Tax Exempt Revenue Bonds [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  | 1 year |  |
Aggregate amount of tax-exempt revenue bonds in a term rate mode |  | 538 |  |  | $ 538 |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  | 66 |  |  | 66 |  |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] | Environmental Facilities Revenue Bonds Due 2054 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  | $ 65 |  |  | $ 65 |  |
Stated interest rate |  | 4.70% |  |  | 4.70% |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  | $ 40 |  |  |  |  |
Restricted Cash |  | 25 |  |  | $ 25 |  |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |
Stated interest rate |  |  | 5.45% |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 396 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | 3,089 |  |  | 3,089 | 2,942 |
Debt Instrument, Unamortized Premium |  | 5 |  |  | 5 | 5 |
Unamortized discount |  | (9) |  |  | (9) | (9) |
Unamortized debt issuance costs |  | (21) |  |  | (21) | (18) |
Total Long-term Debt |  | 3,064 |  |  | 3,064 | 2,920 |
Less current portion of Long-term debt |  | 0 |  |  | 0 | 13 |
Long-term Debt |  | 3,064 |  |  | 3,064 | 2,907 |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 |  | 0 |  |  | 0 |  |
2023 |  | 250 |  |  | 250 |  |
2024 |  | 164 |  |  | 164 |  |
2025 |  | 60 |  |  | 60 |  |
2026 |  | 0 |  |  | 0 |  |
Thereafter |  | 2,615 |  |  | 2,615 |  |
Capacity |  | 400 |  |  | 400 |  |
Kentucky Utilities Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  | 0 |  |  | 0 |  |
Kentucky Utilities Co [Member] | Repayment | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity |  |  | 300 |  |  |  |
Kentucky Utilities Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding |  | $ 0 |  |  | $ 0 | 300 |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate |  | 4.22% |  |  | 4.22% |  |
Principal outstanding |  | $ 3,089 |  |  | $ 3,089 | 2,642 |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  | 7,300 |  |  | $ 7,300 | $ 7,100 |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] | Tax Exempt Revenue Bonds [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  | 1 year |  |
Aggregate amount of tax-exempt revenue bonds in a term rate mode |  | 356 |  |  | $ 356 |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  | 33 |  |  | 33 |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] | Environmental Facilities Revenue Bonds Due 2054 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  | $ 60 |  |  | $ 60 |  |
Stated interest rate |  | 4.70% |  |  | 4.70% |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  | $ 37 |  |  |  |  |
Restricted Cash |  | $ 23 |  |  | $ 23 |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2033 |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |
Stated interest rate |  |  | 5.45% |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Proceeds from Issuance of First Mortgage Bond |  |  | $ 396 |  |  |  |

X
- Definition The aggregate carrying value of property subject to lien. + References No definition available. + Details
Name: | ppl_CarryingValueOfPropertySubjectToLien
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of tax-exempt revenue bonds with a term rate mode at the end of the period. + References No definition available. + Details
Name: | ppl_DebtInstrumentAmountAtTermRateMode
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
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