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Financing Activities - Long-term Debt (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2022 | Sep. 16, 2022 | Aug. 31, 2022 | Jul. 29, 2022
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | $ 13,353 | $ 11,251 |  |  |  |  |
Unamortized premium and (discount), net | (32) | (34) |  |  |  |  |
Unamortized debt issuance costs | (78) | (77) |  |  |  |  |
Total Long-term Debt | 13,243 | 11,140 |  |  |  |  |
Less current portion of Long-term debt | 354 | 474 |  |  |  |  |
Long-term Debt | 12,889 | 10,666 |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 | 354 |  |  |  |  |  |
2023 | 1,501 |  |  |  |  |  |
2024 | 551 |  |  |  |  |  |
2025 | 904 |  |  |  |  |  |
2026 | 303 |  |  |  |  |  |
Thereafter | 9,740 |  |  |  |  |  |
Loss on Extinguishment of Debt | $ 0 | (395) | $ 0 |  |  |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 3.95% |  |  |  |  |  |
Principal outstanding | $ 3,066 | 1,566 |  |  |  |  |
Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 4.06% |  |  |  |  |  |
Principal outstanding | $ 8,957 | 9,205 |  |  |  |  |
Junior Subordinated Notes [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 7.39% |  |  |  |  |  |
Principal outstanding | $ 480 | 480 |  |  |  |  |
Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 5.21% |  |  |  |  |  |
Principal outstanding | $ 850 | 0 |  |  |  |  |
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 | 782 |  |  |  |  |  |
PPL Capital Funding [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 1,450 |  |  |  |  |  |
PPL Electric [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 900 |  |  |  |  |  |
PPL Electric [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 250 |  |  |  | $ 250 |  |
Interest rate on outstanding borrowing |  |  |  |  | 3.77% |  |
PPL Electric [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series B | Remarketed [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 108 |
Stated interest rate |  |  |  |  |  | 2.63% |
PPL Electric [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series A | Remarketed [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  |  | $ 116 |  |  |
Stated interest rate |  |  |  | 3.00% |  |  |
PPL Electric [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Currently Able To Be Called |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | 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 | 11,800 | 11,300 |  |  |  |  |
LGE [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 800 |  |  |  |  |  |
LGE [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 300 |  |  |  |  |  | $ 300
Interest rate on outstanding borrowing |  |  |  |  |  |  | 3.23%
LGE [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien | $ 5,800 | 5,700 |  |  |  |  |
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 | 700 |  |  |  |  |  |
KU [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | 300 |  |  |  |  |  | $ 300
Interest rate on outstanding borrowing |  |  |  |  |  |  | 3.23%
KU [Member] | First Mortgage Bonds [Member] | 2010 Mortgage Indenture [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Aggregate carrying value of property subject to lien | $ 7,100 | 6,900 |  |  |  |  |
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 |  |  |  |  |  |
PPL Electric Utilities Corp [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | 4,539 | 4,539 |  |  |  |  |
Unamortized discount | (22) | (22) |  |  |  |  |
Unamortized debt issuance costs | (31) | (33) |  |  |  |  |
Total Long-term Debt | 4,486 | 4,484 |  |  |  |  |
Less current portion of Long-term debt | 340 | 474 |  |  |  |  |
Long-term Debt | 4,146 | 4,010 |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 | 340 |  |  |  |  |  |
2023 | 900 |  |  |  |  |  |
2024 | 0 |  |  |  |  |  |
2025 | 0 |  |  |  |  |  |
2026 | 108 |  |  |  |  |  |
Thereafter | 3,191 |  |  |  |  |  |
Capacity | 900 |  |  |  |  |  |
PPL Electric Utilities Corp [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | $ 250 |  |  |  | $ 250 |  |
Interest rate on outstanding borrowing |  |  |  |  | 3.77% |  |
PPL Electric Utilities Corp [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series B | Remarketed [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  |  |  |  | $ 108 |
Stated interest rate |  |  |  |  |  | 2.63% |
PPL Electric Utilities Corp [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series A | Remarketed [Member] |  |  |  |  |  |  |
Long-term Debt (Numeric) [Abstract] |  |  |  |  |  |  |
Principal amount |  |  |  | $ 116 |  |  |
Stated interest rate |  |  |  | 3.00% |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 4.26% |  |  |  |  |  |
Principal outstanding | $ 4,289 | 4,539 |  |  |  |  |
PPL Electric Utilities Corp [Member] | Senior Secured Notes - First Mortgage Bonds [Member] | Currently Able To Be Called |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | 250 |  |  |  |  |  |
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 | $ 11,800 | 11,300 |  |  |  |  |
PPL Electric Utilities Corp [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 5.17% |  |  |  |  |  |
Principal outstanding | $ 250 | 0 |  |  |  |  |
Louisville Gas And Electric Co [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | 2,324 | 2,024 |  |  |  |  |
Unamortized discount | (4) | (4) |  |  |  |  |
Unamortized debt issuance costs | (13) | (14) |  |  |  |  |
Total Long-term Debt | 2,307 | 2,006 |  |  |  |  |
Less current portion of Long-term debt | 0 | 0 |  |  |  |  |
Long-term Debt | 2,307 | 2,006 |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 | 0 |  |  |  |  |  |
2023 | 300 |  |  |  |  |  |
2024 | 300 |  |  |  |  |  |
2025 | 90 |  |  |  |  |  |
2026 | 195 |  |  |  |  |  |
Thereafter | 1,439 |  |  |  |  |  |
Capacity | 800 |  |  |  |  |  |
Louisville Gas And Electric Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | $ 300 |  |  |  |  |  | $ 300
Interest rate on outstanding borrowing |  |  |  |  |  |  | 3.23%
Louisville Gas And Electric Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 5.22% |  |  |  |  |  |
Principal outstanding | $ 300 | 0 |  |  |  |  |
Louisville Gas And Electric Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 3.70% |  |  |  |  |  |
Principal outstanding | $ 2,024 | 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 | $ 5,800 | 5,700 |  |  |  |  |
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 | $ 473 |  |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode | 66 |  |  |  |  |  |
Kentucky Utilities Co [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal outstanding | 2,942 | 2,642 |  |  |  |  |
Debt Instrument, Unamortized Premium | 5 | 5 |  |  |  |  |
Unamortized discount | (9) | (9) |  |  |  |  |
Unamortized debt issuance costs | (18) | (20) |  |  |  |  |
Total Long-term Debt | 2,920 | 2,618 |  |  |  |  |
Less current portion of Long-term debt | 13 | 0 |  |  |  |  |
Long-term Debt | 2,907 | 2,618 |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
2022 | 13 |  |  |  |  |  |
2023 | 300 |  |  |  |  |  |
2024 | 250 |  |  |  |  |  |
2025 | 164 |  |  |  |  |  |
2026 | 0 |  |  |  |  |  |
Thereafter | 2,215 |  |  |  |  |  |
Capacity | 700 |  |  |  |  |  |
Kentucky Utilities Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Aggregate maturities of long-term debt (Details) [Abstract] |  |  |  |  |  |  |
Capacity | $ 300 |  |  |  |  |  | $ 300
Interest rate on outstanding borrowing |  |  |  |  |  |  | 3.23%
Kentucky Utilities Co [Member] | Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 5.22% |  |  |  |  |  |
Principal outstanding | $ 300 | 0 |  |  |  |  |
Kentucky Utilities Co [Member] | First Mortgage Bonds [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Weighted-Average Rate | 4.00% |  |  |  |  |  |
Principal outstanding | $ 2,642 | 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 | $ 7,100 | $ 6,900 |  |  |  |  |
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 | $ 309 |  |  |  |  |  |
Aggregate amount of tax-exempt revenue bonds in a variable rate mode | $ 33 |  |  |  |  |  |

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- 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 https://asc.fasb.org/extlink&oid=123466204&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 https://asc.fasb.org/extlink&oid=126734703&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 https://asc.fasb.org/extlink&oid=120391452&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 https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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