XML 150 R75.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Financing Activities - Long-term Debt (Details) £ in Millions, $ in Millions | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2019 GBP (£) | Apr. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 GBP (£) | Sep. 30, 2019 GBP (£) | Sep. 17, 2019 | Jun. 30, 2019 GBP (£) | Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 22,002 |  |  |  |  | $ 20,694
Unamortized premium and (discount), net |  |  |  |  |  | 5 |  |  |  |  | 9
Unamortized debt issuance costs |  |  |  |  |  | (126) |  |  |  |  | (120)
Total Long-term Debt |  |  |  |  |  | 21,893 |  |  |  |  | 20,599
Less current portion of Long-term debt |  |  |  |  |  | 1,172 |  |  |  |  | 530
Long-term Debt |  |  |  |  |  | 20,721 |  |  |  |  | 20,069
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 1,169 |  |  |  |  |
2020 |  |  |  |  |  | 1,574 |  |  |  |  |
2021 |  |  |  |  |  | 1,274 |  |  |  |  |
2022 |  |  |  |  |  | 2,254 |  |  |  |  |
2023 |  |  |  |  |  | 932 |  |  |  |  |
Thereafter |  |  |  |  |  | 14,799 |  |  |  |  |
WPD South West [Member] | Index-linked Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount that may be redeemed in total by series |  |  |  |  |  | 423 | £ 327 |  |  |  |
WPD South Wales [Member] | Index-linked Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | £ |  |  |  |  |  |  |  |  |  | £ 50 |
Stated interest rate |  |  |  |  | 2.189% |  |  |  |  | 2.189% |
Proceeds from debt, including premium net of debt issuance costs |  |  |  |  | $ 63 |  |  |  |  |  |
WPD West Midlands [Member] | Index-linked Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | £ |  |  |  |  |  |  |  | £ 250 |  |  |
Stated interest rate | 1.75% |  |  |  |  |  |  | 1.75% |  |  |
Proceeds from Debt, Net of Issuance Costs | £ |  | £ 245 |  |  |  |  |  |  |  |  |
Proceeds from debt, including premium net of debt issuance costs | $ 301 |  |  |  |  |  |  |  |  |  |
PPL Electric [Member] | Senior Secured Bonds 5.15% Series Due 2020 [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 100 |  |  |  |  |
Stated interest rate |  |  |  |  |  | 5.15% | 5.15% |  |  |  |
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 |  |  |  |  |  | $ 10,100 |  |  |  |  | 9,400
PPL Electric [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Pollution Control Revenue Refunding Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount that may be redeemed at a future date |  |  |  |  |  | 224 |  |  |  |  |
Principal amount that may be redeemed in whole or in part |  |  |  |  |  | $ 90 |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  |  | 1 year |  |  |  |  |
PPL Electric [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2049 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 400 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 3.00% |  |  |  |  |  |  | 3.00% |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt | $ 390 |  |  |  |  |  |  |  |  |  |
LGE [Member] | Jefferson County Pollution Control Revenue Bonds, 2001 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 128 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 1.85% |  |  |  |  |  |  |  |
LGE [Member] | Environmental Facilities Revenue Refunding Bonds, 2007 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 31 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
LGE [Member] | Environmental Facilities Revenue Bonds, 2007 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 35 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
LGE [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  | 1.75% |  |
LGE [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Interest Rate Conversion [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 40 |  |  |  |  |  |
LGE [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  |  |  | $ 5,300 |  |  |  |  | 5,100
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 |  |  |  |  |
LGE [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2049 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.25% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 396 |  |  |  |  |  |  |  |
LKE [Member] | 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 |  |  |  |  |  | $ 700 |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  |  |  | 181 |  |  |  |  |
KU [Member] | Environmental Facilities Revenue Bonds, 2004 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 50 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.75% |  |  |  |  |  |  | 1.75% |  |  |
KU [Member] | Pollution Control Revenue Bonds, 2016 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 96 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.55% |  |  |  |  |  |  | 1.55% |  |  |
KU [Member] | Environmental Facilities Revenue Bonds, 2006 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 54 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
KU [Member] | Environmental Facilities Revenue Bonds, 2008 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 78 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
KU [Member] | Solid Waste Disposal Facility Revenue Bonds, 2000 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 13 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.30% |  |  |  |  |  |  | 1.30% |  |  |
KU [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  |  |  | $ 6,600 |  |  |  |  | 6,300
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 |  |  |  |  |
KU [Member] | First Mortgage Bonds [Member] | First Mortgage Bond Due 2045 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 300 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.375% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 303 |  |  |  |  |  |  |  |
WPD South West, WPD East Midlands and WPD South Wales [Member] | Index-linked Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in principal due to inflation |  |  |  |  |  | $ 26 | £ 20 |  |  |  |
U.S. [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 13,960 |  |  |  |  | 13,160
U.S. [Member] | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.88% | 3.88% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 4,325 |  |  |  |  | 4,325
U.S. [Member] | Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.95% | 3.95% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 8,705 |  |  |  |  | 7,705
U.S. [Member] | Junior Subordinated Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 5.24% | 5.24% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 930 |  |  |  |  | 930
U.S. [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 0 |  |  |  |  | 200
U.K. [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | 8,042 |  |  |  |  | 7,534
Fair market value adjustments |  |  |  |  |  | 12 |  |  |  |  | 16
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount that may be put back to the issuer |  |  |  |  |  | $ 7,400 | £ 5,700 |  |  |  |
U.K. [Member] | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 4.97% | 4.97% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 6,874 |  |  |  |  | 6,471
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount that may be redeemed in total but not in part |  |  |  |  |  | $ 291 | £ 225 |  |  |  |
U.K. [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 2.18% | 2.18% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 64 |  |  |  |  | 0
U.K. [Member] | Index-linked Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 1.45% | 1.45% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 1,104 |  |  |  |  | 1,063
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | 4,039 |  |  |  |  | 3,739
Unamortized discount |  |  |  |  |  | (24) |  |  |  |  | (18)
Unamortized debt issuance costs |  |  |  |  |  | (30) |  |  |  |  | (27)
Total Long-term Debt |  |  |  |  |  | 3,985 |  |  |  |  | 3,694
Less current portion of Long-term debt |  |  |  |  |  | 0 |  |  |  |  | 0
Long-term Debt |  |  |  |  |  | 3,985 |  |  |  |  | 3,694
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |  |
2020 |  |  |  |  |  | 400 |  |  |  |  |
2021 |  |  |  |  |  | 474 |  |  |  |  |
2022 |  |  |  |  |  | 90 |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |  |
Thereafter |  |  |  |  |  | 3,075 |  |  |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Bonds 5.15% Series Due 2020 [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 100 |  |  |  |  |
Stated interest rate |  |  |  |  |  | 5.15% | 5.15% |  |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 4.08% | 4.08% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 4,039 |  |  |  |  | 3,739
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 |  |  |  |  |  | 10,100 |  |  |  |  | 9,400
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Pollution Control Revenue Refunding Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount that may be redeemed at a future date |  |  |  |  |  | 224 |  |  |  |  |
Principal amount that may be redeemed in whole or in part |  |  |  |  |  | $ 90 |  |  |  |  |
Minimum length of time to convert interest rate mode |  |  |  |  |  | 1 year |  |  |  |  |
PPL Electric Utilities Corp [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | $ 400 |  |  |  |  |  |  |
Stated interest rate |  |  |  | 3.00% |  |  |  |  |  |  |
Proceeds from Debt, Net of Issuance Costs |  |  |  | $ 390 |  |  |  |  |  |  |
LG And E And KU Energy LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 6,041 |  |  |  |  | 5,541
Debt Instrument, Unamortized Premium |  |  |  |  |  | 5 |  |  |  |  | 0
Unamortized discount |  |  |  |  |  | (12) |  |  |  |  | (13)
Unamortized debt issuance costs |  |  |  |  |  | (32) |  |  |  |  | (26)
Total Long-term Debt |  |  |  |  |  | 6,002 |  |  |  |  | 5,502
Less current portion of Long-term debt |  |  |  |  |  | 975 |  |  |  |  | 530
Long-term Debt |  |  |  |  |  | 5,027 |  |  |  |  | 4,972
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 975 |  |  |  |  |
2020 |  |  |  |  |  | 674 |  |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |  |
2022 |  |  |  |  |  | 13 |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |  |
Thereafter |  |  |  |  |  | $ 4,379 |  |  |  |  |
LG And E And KU Energy LLC [Member] | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.97% | 3.97% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 725 |  |  |  |  | 725
LG And E And KU Energy LLC [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 0 |  |  |  |  | 200
LG And E And KU Energy LLC [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.84% | 3.84% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 4,666 |  |  |  |  | 3,966
LG And E And KU Energy LLC [Member] | 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 |  |  |  |  |  | 700 |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  |  |  | $ 181 |  |  |  |  |
LG And E And KU Energy LLC [Member] | PPL Affiliate [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.69% | 3.69% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 650 |  |  |  |  | 650
LG And E And KU Energy LLC [Member] | LGE [Member] | Jefferson County Pollution Control Revenue Bonds, 2001 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 128 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 1.85% |  |  |  |  |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Environmental Facilities Revenue Refunding Bonds, 2007 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 31 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
LG And E And KU Energy LLC [Member] | LGE [Member] | Environmental Facilities Revenue Bonds, 2007 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 35 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
LG And E And KU Energy LLC [Member] | LGE [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  | 1.75% |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Interest Rate Conversion [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 40 |  |  |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  |  |  | $ 5,300 |  |  |  |  | 5,100
LG And E And KU Energy LLC [Member] | 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 |  |  |  |  |
LG And E And KU Energy LLC [Member] | LGE [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2049 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.25% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 396 |  |  |  |  |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Environmental Facilities Revenue Bonds, 2004 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 50 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.75% |  |  |  |  |  |  | 1.75% |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Pollution Control Revenue Bonds, 2016 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 96 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.55% |  |  |  |  |  |  | 1.55% |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Environmental Facilities Revenue Bonds, 2006 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 54 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Environmental Facilities Revenue Bonds, 2008 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 78 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | Solid Waste Disposal Facility Revenue Bonds, 2000 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 13 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.30% |  |  |  |  |  |  | 1.30% |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien |  |  |  |  |  | $ 6,600 |  |  |  |  | 6,300
LG And E And KU Energy LLC [Member] | 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 |  |  |  |  |
LG And E And KU Energy LLC [Member] | KU [Member] | First Mortgage Bonds [Member] | First Mortgage Bond Due 2045 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 300 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.375% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 303 |  |  |  |  |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 2,024 |  |  |  |  | 1,824
Unamortized discount |  |  |  |  |  | (4) |  |  |  |  | (4)
Unamortized debt issuance costs |  |  |  |  |  | (15) |  |  |  |  | (11)
Total Long-term Debt |  |  |  |  |  | 2,005 |  |  |  |  | 1,809
Less current portion of Long-term debt |  |  |  |  |  | 0 |  |  |  |  | 434
Long-term Debt |  |  |  |  |  | 2,005 |  |  |  |  | 1,375
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 0 |  |  |  |  |
2020 |  |  |  |  |  | 292 |  |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |  |
2022 |  |  |  |  |  | 0 |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |  |
Thereafter |  |  |  |  |  | $ 1,732 |  |  |  |  |
Louisville Gas And Electric Co [Member] | Jefferson County Pollution Control Revenue Bonds, 2001 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 128 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 1.85% |  |  |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Environmental Facilities Revenue Refunding Bonds, 2007 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 31 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
Louisville Gas And Electric Co [Member] | Environmental Facilities Revenue Bonds, 2007 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 35 |  |  |  |  |  |
Stated interest rate |  |  |  |  | 1.65% |  |  |  |  | 1.65% |
Louisville Gas And Electric Co [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  | 1.75% |  |
Louisville Gas And Electric Co [Member] | Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] | Interest Rate Conversion [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  | $ 40 |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | $ 0 |  |  |  |  | 200
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.73% | 3.73% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 2,024 |  |  |  |  | 1,624
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 |  |  |  |  |  | $ 5,300 |  |  |  |  | 5,100
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 |  |  |  |  |  | $ 392 |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  |  |  | 148 |  |  |  |  |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] | First Mortgage Bonds Due 2049 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 400 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.25% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 396 |  |  |  |  |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Principal outstanding |  |  |  |  |  | 2,642 |  |  |  |  | 2,342
Debt Instrument, Unamortized Premium |  |  |  |  |  | 5 |  |  |  |  | 0
Unamortized discount |  |  |  |  |  | (8) |  |  |  |  | (8)
Unamortized debt issuance costs |  |  |  |  |  | (16) |  |  |  |  | (13)
Total Long-term Debt |  |  |  |  |  | 2,623 |  |  |  |  | 2,321
Less current portion of Long-term debt |  |  |  |  |  | 500 |  |  |  |  | 96
Long-term Debt |  |  |  |  |  | 2,123 |  |  |  |  | 2,225
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 500 |  |  |  |  |
2020 |  |  |  |  |  | 132 |  |  |  |  |
2021 |  |  |  |  |  | 0 |  |  |  |  |
2022 |  |  |  |  |  | 13 |  |  |  |  |
2023 |  |  |  |  |  | 0 |  |  |  |  |
Thereafter |  |  |  |  |  | $ 1,997 |  |  |  |  |
Kentucky Utilities Co [Member] | Environmental Facilities Revenue Bonds, 2004 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 50 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.75% |  |  |  |  |  |  | 1.75% |  |  |
Kentucky Utilities Co [Member] | Pollution Control Revenue Bonds, 2016 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 96 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.55% |  |  |  |  |  |  | 1.55% |  |  |
Kentucky Utilities Co [Member] | Environmental Facilities Revenue Bonds, 2006 Series B [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 54 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
Kentucky Utilities Co [Member] | Environmental Facilities Revenue Bonds, 2008 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 78 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.20% |  |  |  |  |  |  | 1.20% |  |  |
Kentucky Utilities Co [Member] | Solid Waste Disposal Facility Revenue Bonds, 2000 Series A [Member] | Remarketed [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount | $ 13 |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.30% |  |  |  |  |  |  | 1.30% |  |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-Average Rate |  |  |  |  |  | 3.93% | 3.93% |  |  |  |
Principal outstanding |  |  |  |  |  | $ 2,642 |  |  |  |  | 2,342
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 |  |  |  |  |  | $ 6,600 |  |  |  |  | $ 6,300
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 |  |  |  |  |  | $ 308 |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode |  |  |  |  |  | $ 33 |  |  |  |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] | First Mortgage Bond Due 2045 [Member] |  |  |  |  |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 300 |  |  |  |  |  |  |  |
Stated interest rate |  |  | 4.375% |  |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Secured Debt |  |  | $ 303 |  |  |  |  |  |  |  |

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

X
- Definition The amount of increase (decrease) to the principal amount of the original debt instrument resulting from inflation during the period. + References No definition available. + Details
Name: | ppl_DebtInstrumentIncreaseDecreaseDueToInflation
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The principal amount that may be redeemed, in total by series, at a later date, at the greater of the adjusted principal value and a make-whole value determined by reference to the gross real yield on a nominated U.K. government bond. + References No definition available. + Details
Name: | ppl_DebtInstrumentPrincipalAmountRedeemedInTotalBySeries
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The principal amount that may be redeemed, in whole or in part, at par at a later date and are subject to mandatory redemption upon determination that the interest rate on the bonds would be included in the holders' gross income for federal tax purposes. + References No definition available. + Details
Name: | ppl_DebtInstrumentPrincipalAmountRedeemedWholeOrPartPriorToMaturity
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Adjustments made to record long-term debt at fair value at the time of an entity's acquisition. + References No definition available. + Details
Name: | ppl_FairValueAdjustmentsFromPurchaseAccounting
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum length of time to convert interest rate mode on the bonds. + References No definition available. + Details
Name: | ppl_MinimumLengthOfTimeToConvertInterestRateMode
Namespace Prefix: | ppl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate principal amount that maybe put by the holders to the issuers for redemption if a change in credit ratings or if withdrawn due to a restructuring event. + References No definition available. + Details
Name: | ppl_PrincipalAmountThatMayBePutBackToIssuer
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The principal amount that may be redeemed, in total but not in part, at a later date, at the greater of the principal value or a value determined by reference to the gross redemption yield on a nominated U.K. Government bond. + References No definition available. + Details
Name: | ppl_PrincipalAmountThatMayBeRedeemedInTotal
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow from additional borrowings including premium and net of cash paid to third parties in connection with debt origination. + References No definition available. + Details
Name: | ppl_Proceedsfromdebtincludingpremiumnetofdebtissuancecosts
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Value of notes that may be redeemed at par. + References No definition available. + Details
Name: | ppl_RedemptionAmount
Namespace Prefix: | ppl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28567-108399 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 + Details
Name: | us-gaap_DebtInstrumentUnamortizedPremium
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DebtInstrumentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LongTermDebtByMaturityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
Name: | us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfSecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ppl_ByCompanyAxis=ppl_WpdSouthWestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ppl_IndexLinkedSeniorUnsecuredNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_WPDSouthWalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_WpdWestMidlandsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_PplElectricUtilitiesCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_SeniorSecuredBonds5.15SeriesDue2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_LongTermDebtActivityAxis=ppl_BondRedemptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ppl_SeniorSecuredNotesFirstMortgageBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_MortgageIndenture2001Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_PollutionControlRevenueRefundingBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_FirstMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_FirstMortgageBondsDue2049Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_LouisvilleGasAndElectricCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_JeffersonCountyPollutionControlRevenueBonds2001SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_LongTermDebtActivityAxis=ppl_RemarketedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_EnvironmentalFacilitiesRevenueRefundingBonds2007SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_EnvironmentalFacilitiesRevenueBonds2007SeriesBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_LouisvilleJeffersonCountyMetroGovernmentofKentuckyPollutionControlRevenueBonds2005SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_LongTermDebtActivityAxis=ppl_InterestRateConversionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_MortgageIndenture2010Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_TaxExemptRevenueFacilitiesNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_LouisvilleGasAndElectricAndKentuckyUtilitiesEnergyLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_KentuckyUtilitiesCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_EnvironmentalFacilitiesRevenueBonds2004SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_PollutionControlRevenueBonds2016SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_EnvironmentalFacilitiesRevenueBonds2006SeriesBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_EnvironmentalFacilitiesRevenueBonds2008SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_SolidWasteDisposalFacilityRevenueBonds2000SeriesAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ppl_FirstMortgageBondDue2045Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ppl_ByCompanyAxis=ppl_WPDSouthWestWPDEastMidlandsandWPDSouthWalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_JuniorSubordinatedDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ppl_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_PplElectricUtilitiesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_LGAndEAndKUEnergyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ppl_CompanyAffiliateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_LouisvilleGasAndElectricCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=ppl_KentuckyUtilitiesCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |