XML 89 R61.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies - Environmental Matters and Other (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) employees | Dec. 31, 2017 USD ($)
Other - Labor Union Agreements (Numeric) [Abstract] |  |
Collective Bargaining Agreement Term | 5 years |
PPL Electric [Member] | PPL Electric Additional Sites [Member] |  |
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract] |  |
Environmental site accrual | $ | $ 11 | $ 10
PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member] |  |
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract] |  |
Environmental site accrual | $ | $ 11 | $ 10
LG And E And KU Energy LLC [Member] | KU [Member] |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |
Collective Bargaining Agreement Term | 3 years |
Number Of Union Employees | employees | 68 |
Kentucky Utilities Co [Member] |  |
Other - Labor Union Agreements (Numeric) [Abstract] |  |
Collective Bargaining Agreement Term | 3 years |
Number Of Union Employees | employees | 68 |

X
- Definition Term, in years, of bargaining agreement. + References No definition available. + Details
Name: | ppl_CollectiveBargainingAgreementTerm
Namespace Prefix: | ppl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Concentration Risk Number Of Union Employees + References No definition available. + Details
Name: | ppl_ConcentrationRiskNumberOfUnionEmployees
Namespace Prefix: | ppl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Other - Labor Unions [Abstract] + References No definition available. + Details
Name: | ppl_OtherLaborUnionsAbstract
Namespace Prefix: | ppl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 + Details
Name: | us-gaap_AccrualForEnvironmentalLossContingencies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | us-gaap_EnvironmentalRemediationSiteAxis=ppl_PplElectricAdditionalSitesMember
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: | ppl_ByCompanyAxis=ppl_KentuckyUtilitiesCompanyMember
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: |