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Financing Activities - Short-term Debt (Details) - Commercial Paper [Member] - USD ($) $ in Millions | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Short-term Debt [Line Items] |  |  |
Capacity | $ 2,925 |  |
Commercial Paper Issuances | 0 |  | $ 867
Unused Capacity | $ 2,925 |  |
PPL Capital Funding [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  | 0.25%
Capacity | $ 1,500 |  |
Commercial Paper Issuances | 0 |  | $ 402
Unused Capacity | $ 1,500 |  |
PPL Electric [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  |
Capacity | $ 650 |  |
Commercial Paper Issuances | 0 |  | $ 0
Unused Capacity | $ 650 |  |
LGE [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  | 0.28%
Capacity | $ 425 | $ 425 | $ 350
Commercial Paper Issuances | 0 |  | $ 262
Unused Capacity | $ 425 |  |
KU [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  | 0.28%
Capacity | $ 350 |  |
Commercial Paper Issuances | 0 |  | $ 203
Unused Capacity | $ 350 |  |
PPL Electric Utilities Corp [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  |
Capacity | $ 650 |  |
Commercial Paper Issuances | 0 |  | $ 0
Unused Capacity | $ 650 |  |
PPL Electric Utilities Corp [Member] | PPL Electric [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  |
Louisville Gas And Electric Co [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  | 0.28%
Capacity | $ 425 | $ 425 | $ 350
Commercial Paper Issuances | 0 |  | $ 262
Unused Capacity | $ 425 |  |
Kentucky Utilities Co [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Weighted - Average Interest Rate |  |  | 0.28%
Capacity | $ 350 |  |
Commercial Paper Issuances | 0 |  | $ 203
Unused Capacity | $ 350 |  |

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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. + References Reference 1: 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(13)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 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=120400017&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(19)(a)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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