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Financing Activities - Long-term Debt (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2024 | Mar. 31, 2024 | Jan. 31, 2024 | Dec. 31, 2024 | Aug. 01, 2024 | Mar. 01, 2024 | Jan. 01, 2024 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal outstanding |  |  |  | $ 16,674 |  |  |  | $ 14,775
Unamortized premium and (discount), net |  |  |  | (57) |  |  |  | (55)
Unamortized debt issuance costs |  |  |  | (114) |  |  |  | (108)
Total Long-term Debt |  |  |  | 16,503 |  |  |  | 14,612
Less current portion of Long-term debt |  |  |  | 551 |  |  |  | 1
Long-term Debt |  |  |  | 15,952 |  |  |  | 14,611
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
2022 |  |  |  | 551 |  |  |  |
2023 |  |  |  | 904 |  |  |  |
2024 |  |  |  | 428 |  |  |  |
2025 |  |  |  | 1,350 |  |  |  |
2026 |  |  |  | 116 |  |  |  |
Thereafter |  |  |  | $ 13,325 |  |  |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 4.34% |  |  |  |
Principal outstanding |  |  |  | $ 4,316 |  |  |  | 3,066
Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 4.38% |  |  |  |
Principal outstanding |  |  |  | $ 10,878 |  |  |  | 10,229
Junior Subordinated Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 7.25% |  |  |  |
Principal outstanding |  |  |  | $ 480 |  |  |  | 480
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 |  |  |  |
Exchangeable Senior Unsecured Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 2.88% |  |  |  |
Principal outstanding |  |  |  | $ 1,000 |  |  |  | 1,000
PPL Capital Funding [Member] |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Capacity |  |  |  | 1,450 |  |  |  |
PPL Capital Funding [Member] | Senior Notes [Member] | Senior Notes due 2034 |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 750 |  |  |
Stated interest rate |  |  |  |  | 5.25% |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Proceeds from Issuance of Senior Long-Term Debt | $ 741 |  |  |  |  |  |  |
PPL Electric [Member] |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Capacity |  |  |  | 650 |  |  |  |
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 |  |  |  | 13,300 |  |  |  | 12,400
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds due 2034 |  |  |  |  |  |  |  |
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 |  |  |  |  |
LGE [Member] |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Capacity |  |  |  | 500 |  |  |  |
LGE [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  | $ 6,000 |  |  |  | 5,900
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 |  |  |  |
KU [Member] |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Capacity |  |  |  | 400 |  |  |  |
KU [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  | $ 7,500 |  |  |  | 7,300
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 |  |  |  |
Rhode Island Energy | Senior Notes [Member] | Senior Notes due 2034 |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 500 |  |
Stated interest rate |  |  |  |  |  | 5.35% |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
Proceeds from Issuance of Senior Long-Term Debt |  | $ 496 |  |  |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal outstanding |  |  |  | 5,299 |  |  |  | 4,649
Unamortized discount |  |  |  | (42) |  |  |  | (42)
Unamortized debt issuance costs |  |  |  | (43) |  |  |  | (40)
Total Long-term Debt |  |  |  | 5,214 |  |  |  | 4,567
Less current portion of Long-term debt |  |  |  | 0 |  |  |  | 0
Long-term Debt |  |  |  | 5,214 |  |  |  | 4,567
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
2022 |  |  |  | 0 |  |  |  |
2023 |  |  |  | 0 |  |  |  |
2024 |  |  |  | 108 |  |  |  |
2025 |  |  |  | 0 |  |  |  |
2026 |  |  |  | 116 |  |  |  |
Thereafter |  |  |  | 5,075 |  |  |  |
Capacity |  |  |  | $ 650 |  |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 4.64% |  |  |  |
Principal outstanding |  |  |  | $ 5,299 |  |  |  | 4,649
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 |  |  |  | 13,300 |  |  |  | 12,400
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds due 2034 |  |  |  |  |  |  |  |
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 |  |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal outstanding |  |  |  | 2,489 |  |  |  | 2,489
Unamortized discount |  |  |  | (4) |  |  |  | (4)
Unamortized debt issuance costs |  |  |  | (14) |  |  |  | (16)
Total Long-term Debt |  |  |  | 2,471 |  |  |  | 2,469
Less current portion of Long-term debt |  |  |  | 300 |  |  |  | 0
Long-term Debt |  |  |  | 2,171 |  |  |  | 2,469
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
2022 |  |  |  | 300 |  |  |  |
2023 |  |  |  | 90 |  |  |  |
2024 |  |  |  | 260 |  |  |  |
2025 |  |  |  | 0 |  |  |  |
2026 |  |  |  | 0 |  |  |  |
Thereafter |  |  |  | 1,839 |  |  |  |
Capacity |  |  |  | $ 500 |  |  |  |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 4.01% |  |  |  |
Principal outstanding |  |  |  | $ 2,489 |  |  |  | 2,489
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 |  |  |  | $ 6,000 |  |  |  | 5,900
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 |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  | 66 |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal outstanding |  |  |  | 3,089 |  |  |  | 3,089
Debt Instrument, Unamortized Premium |  |  |  | 4 |  |  |  | 5
Unamortized discount |  |  |  | (8) |  |  |  | (9)
Unamortized debt issuance costs |  |  |  | (19) |  |  |  | (21)
Total Long-term Debt |  |  |  | 3,066 |  |  |  | 3,064
Less current portion of Long-term debt |  |  |  | 250 |  |  |  | 0
Long-term Debt |  |  |  | 2,816 |  |  |  | 3,064
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |
2022 |  |  |  | 250 |  |  |  |
2023 |  |  |  | 164 |  |  |  |
2024 |  |  |  | 60 |  |  |  |
2025 |  |  |  | 0 |  |  |  |
2026 |  |  |  | 0 |  |  |  |
Thereafter |  |  |  | 2,615 |  |  |  |
Capacity |  |  |  | $ 400 |  |  |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  | 4.22% |  |  |  |
Principal outstanding |  |  |  | $ 3,089 |  |  |  | 3,089
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 |  |  |  | $ 7,500 |  |  |  | $ 7,300
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 |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  | $ 33 |  |  |  |

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