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

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- References

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- Definition

Amount of voluntary contribution made to public park.

+ References

No definition available.

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- Definition

Amount for the purchase carbon allowances under the United Kingdom Carbon Reduction Commitment.

+ References

No definition available.

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- Definition

The number of fuel sources that were previously subject to the reporting and emission allowance requirements that are now removed under the United Kingdom Carbon Reduction Commitment.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

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- References

No definition available.

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- References

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- References

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- 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=25496072&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

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- Definition

Best estimate of the reasonably possible loss exposure in excess of the amount accrued for environmental loss contingencies at an individual site.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 50
-Paragraph 10
-Subparagraph (c),(d)(2)
-URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859

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Commitments and Contingencies (Environmental Matter and Other) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 GBP (£) Integer	Mar. 31, 2016 USD ($) Integer	Dec. 31, 2015 USD ($)
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| Integer	6	6
Environmental Matters - WPD - European Union Creosote Ban (Numeric) [Abstract]
Number of poles to be replaced \| Integer	1,400,000	1,400,000
Environmental Matters - WPD - Carbon Reduction Commitment (Numeric) [Abstract]
Annual cost of purchasing allowances \| £	£ 400,000
Number of fuel sources no longer subject to reporting and emission allowance requirements	18 fuel sources	18 fuel sources
PPL Electric Additional Sites [Member]
Enviromental Matters (Numeric) [Abstract]
Environmental site accrual		$ 10	$ 10
Potential costs for remediation and other liabilities in excess of accrual		30
Substation [Member] \| Linear Alkyl Benzene [Member]
Environmental Matters - WPD - Discharge at Substation (Numeric) [Abstract]
Voluntary contribution made to public park \| £	£ 25,000
LGE [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Enviromental Matters (Numeric) [Abstract]
Potential costs for compliance		311
KU [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Enviromental Matters (Numeric) [Abstract]
Potential costs for compliance		661
PPL Electric Utilities Corp [Member] \| PPL Electric Additional Sites [Member]
Enviromental Matters (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	6
LG And E And KU Energy LLC [Member] \| LGE [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Enviromental Matters (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]
Enviromental Matters (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	6
Louisville Gas And Electric Co [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Enviromental Matters (Numeric) [Abstract]
Potential costs for compliance		$ 311
Kentucky Utilities Co [Member]
Environmental Matters - Domestic - Air (Numeric) [Abstract]
Number of criteria pollutants \| Integer	6	6
Kentucky Utilities Co [Member] \| LGE And KU Sites [Member] \| Coal Combustion Residuals [Member]
Enviromental Matters (Numeric) [Abstract]
Potential costs for compliance		$ 661