The number of criteria pollutants used to protect public health and welfare under the Clean Air Act.

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- Definition

Environmental Matters Foreign Operations Fuel Sources No Longer Subject To Requirements

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The number of poles to be replaced in the United Kingdom if creosote-treated poles are banned.

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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Best estimate of the reasonably possible loss exposure in excess of the amount accrued for environmental loss contingencies at an individual site.

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-Name Accounting Standards Codification
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Best estimate of the loss exposure for reasonably possible environmental contingencies at an individual site for which no accrual has been recorded.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Commitments and Contingencies - Environmental Matters (Details) wood_poles in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) Integer wood_poles pollutant fuel_sources	Dec. 31, 2015 USD ($)
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| pollutant	6
Number of fuel sources no longer subject to reporting and emission allowance requirements \| fuel_sources	18
Environmental Matters - European Union Creosote Ban (Numeric) [Abstract]
Number of poles to be replaced \| wood_poles	1.4
PPL Electric Additional Sites [Member]
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract]
Environmental site accrual	$ 10	$ 10
Potential costs for remediation and other liabilities in excess of accrual	30
LGE [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	311
KU [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	661
PPL Electric Utilities Corp [Member] \| PPL Electric Additional Sites [Member]
Environmental Matters - Superfund and Other Remediation (Numeric) [Abstract]
Environmental site accrual	10	$ 10
Potential costs for remediation and other liabilities in excess of accrual	$ 30
LG And E And KU Energy LLC [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| Integer	6
LG And E And KU Energy LLC [Member] \| LGE [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	$ 311
LG And E And KU Energy LLC [Member] \| KU [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	$ 661
Louisville Gas And Electric Co [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| Integer	6
Louisville Gas And Electric Co [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	$ 311
Kentucky Utilities Co [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| Integer	6
Kentucky Utilities Co [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Environmental Matters - Water/Waste - Coal Combustion Residuals (Numeric) [Abstract]
Potential costs for compliance	$ 661