XML 72 R50.htm IDEA: XBRL DOCUMENT
v3.20.2

Utility Rate Regulation - Regulatory Liabilities (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | $ 90 | $ 115
Noncurrent regulatory liabilities | 2,543 | 2,572
Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 23 | 23
Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 6 | 5
Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 14 | 9
Fuel adjustment clause [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 8 | 8
TCJA customer refund [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 21 | 61
Storm Damage Expense Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 7 | 5
Act 129 Compliance Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 8 | 0
Accumulated Cost Of Removal Of Utility Plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 648 | 640
Power Purchase Agreement OVEC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 45 | 51
Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 1,705 | 1,756
Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 59 | 51
Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 66 | 68
Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 3 | 4
Noncurrent regulatory liabilities | 20 | 6
PPL Electric Utilities Corp [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 73 | 96
Noncurrent regulatory liabilities | 582 | 599
PPL Electric Utilities Corp [Member] | Generation Supply Charge [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 23 | 23
PPL Electric Utilities Corp [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Universal Service Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 14 | 9
PPL Electric Utilities Corp [Member] | Fuel adjustment clause [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | TCJA customer refund [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 21 | 59
PPL Electric Utilities Corp [Member] | Storm Damage Expense Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 7 | 5
PPL Electric Utilities Corp [Member] | Act 129 Compliance Rider [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 8 | 0
PPL Electric Utilities Corp [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Power Purchase Agreement OVEC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 565 | 588
PPL Electric Utilities Corp [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 17 | 11
PPL Electric Utilities Corp [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
PPL Electric Utilities Corp [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Noncurrent regulatory liabilities | 0 | 0
LG And E And KU Energy LLC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 17 | 19
Noncurrent regulatory liabilities | 1,961 | 1,973
LG And E And KU Energy LLC [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 6 | 5
LG And E And KU Energy LLC [Member] | Demand Side Management [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 2 | 3
LG And E And KU Energy LLC [Member] | Fuel adjustment clause [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 8 | 8
LG And E And KU Energy LLC [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 648 | 640
LG And E And KU Energy LLC [Member] | Power Purchase Agreement OVEC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 45 | 51
LG And E And KU Energy LLC [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 1,140 | 1,168
LG And E And KU Energy LLC [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 42 | 40
LG And E And KU Energy LLC [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 66 | 68
LG And E And KU Energy LLC [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 1 | 3
Noncurrent regulatory liabilities | 20 | 6
Louisville Gas And Electric Co [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 5 | 2
Noncurrent regulatory liabilities | 885 | 883
Louisville Gas And Electric Co [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 2 | 1
Louisville Gas And Electric Co [Member] | Demand Side Management [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 1 | 1
Louisville Gas And Electric Co [Member] | Fuel adjustment clause [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 2 | 0
Louisville Gas And Electric Co [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 271 | 266
Louisville Gas And Electric Co [Member] | Power Purchase Agreement OVEC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 31 | 35
Louisville Gas And Electric Co [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 532 | 544
Louisville Gas And Electric Co [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 0 | 0
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 33 | 34
Louisville Gas And Electric Co [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 0 | 0
Noncurrent regulatory liabilities | 18 | 4
Kentucky Utilities Co [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 12 | 17
Noncurrent regulatory liabilities | 1,076 | 1,090
Kentucky Utilities Co [Member] | Environmental Cost Recovery [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 4 | 4
Kentucky Utilities Co [Member] | Demand Side Management [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 1 | 2
Kentucky Utilities Co [Member] | Fuel adjustment clause [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 6 | 8
Kentucky Utilities Co [Member] | Accumulated Cost Of Removal Of Utility Plant [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 377 | 374
Kentucky Utilities Co [Member] | Power Purchase Agreement OVEC [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 14 | 16
Kentucky Utilities Co [Member] | Net deferred taxes [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 608 | 624
Kentucky Utilities Co [Member] | Defined Benefit Plans [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 42 | 40
Kentucky Utilities Co [Member] | Terminated interest rate swaps [Member] |  |
Regulatory Liabilities [Line Items] |  |
Noncurrent regulatory liabilities | 33 | 34
Kentucky Utilities Co [Member] | Other Regulatory Liabilities [Member] |  |
Regulatory Liabilities [Line Items] |  |
Current regulatory liabilities | 1 | 3
Noncurrent regulatory liabilities | $ 2 | $ 2

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_RegulatoryLiabilitiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_RegulatoryLiabilityNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_GenerationSupplyChargeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_EnvironmentalCostRecoveryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_UniversalServiceRiderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_DeferredFuelCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_TCJAsurcreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_StormDamageExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_Act129ComplianceRiderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_RemovalCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_PowerPurchaseAgreementOhioValleyElectricCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_NetDeferredTaxAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=us-gaap_PensionAndOtherPostretirementPlansCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_TerminatedInterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryLiabilityAxis=ppl_OtherRegulatoryLiabilitiesMember
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_RegulatoryLiabilityAxis=ppl_DemandSideManagementMember
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: |