XML 94 R67.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair Value Measurements - Financial Instruments Not Recorded at Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | $ 11,139 | $ 14,689
Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 13,091 | 17,774
PPL Electric Utilities Corp [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 4,483 | 4,236
PPL Electric Utilities Corp [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 5,296 | 5,338
Louisville Gas And Electric Co [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 2,006 | 2,007
Louisville Gas And Electric Co [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 2,387 | 2,499
Kentucky Utilities Co [Member] | Carrying Amount [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | 2,618 | 2,618
Kentucky Utilities Co [Member] | Fair Value [Member] |  |
Fair Value of Financial Instruments Not Recorded at Fair Value - Other |  |
Debt Instrument, Fair Value Disclosure | $ 3,157 | $ 3,334

X
- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69C -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 55 -Paragraph 69B -URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1D -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611 + Details
Name: | us-gaap_DebtInstrumentFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
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_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: |