The number of miles surrounding the plant that a class of plaintiffs could include in a class action suit.

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency at the Can Run plant.

+ References

No definition available.

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- Definition

The number of Clean Air Act violation claims that remains unresolved after a July 2014 court ruling.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

The number of coal-fired generating units retired at the Cane Run plant.

+ References

No definition available.

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- References

No definition available.

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- Definition

Amount of civil penalties that can be assessed by the FERC under the Federal Power Act per day, per violation, for certain violations.

+ References

No definition available.

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- Definition

Period when purchase commitment is set to mature.

+ References

No definition available.

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- References

No definition available.

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

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- Definition

Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- 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.

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- Definition

The amount purchased during the period under an unrecorded unconditional purchase obligation (for example, under the take-or-pay or throughput contract).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308

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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2015 Integer	Jun. 30, 2015 Integer	Dec. 31, 2015 USD ($) Integer mi	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Number of residents that filed class action suit \| Integer			6
Number of miles within plant that would include a class of residents \| mi			4
Number of remaining unresolved Clean Air Act violation claims after July 2014 court ruling \| Integer			1
Regulatory Issues - Electric - Reliability Standards (Numeric) [Abstract]
Maximum per day penalties for reliability violations			$ 1
Power Purchase [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2016			26
2017			27
2018			27
2019			28
2020			29
Thereafter			628
Total future obligation			765
Purchases			$ 22	$ 25	$ 26
Coal [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2022
Coal Transporation And Fleeting Services [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Natural Gas Storage [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Natural Gas Transportation [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2026
LGE [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Generating units retired at the Cane Run plant \| Integer	1	2
PPL Electric Utilities Corp [Member]
Regulatory Issues - Electric - Reliability Standards (Numeric) [Abstract]
Maximum per day penalties for reliability violations			$ 1
LG And E And KU Energy LLC [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Number of residents that filed class action suit \| Integer			6
Number of miles within plant that would include a class of residents \| mi			4
Number of remaining unresolved Clean Air Act violation claims after July 2014 court ruling \| Integer			1
Regulatory Issues - Electric - Reliability Standards (Numeric) [Abstract]
Maximum per day penalties for reliability violations			$ 1
LG And E And KU Energy LLC [Member] \| Power Purchase [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2016			26
2017			27
2018			27
2019			28
2020			29
Thereafter			628
Total future obligation			765
Purchases			$ 22	25	26
LG And E And KU Energy LLC [Member] \| Coal [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2022
LG And E And KU Energy LLC [Member] \| Coal Transporation And Fleeting Services [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
LG And E And KU Energy LLC [Member] \| Natural Gas Storage [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
LG And E And KU Energy LLC [Member] \| Natural Gas Transportation [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2026
LG And E And KU Energy LLC [Member] \| LGE [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Generating units retired at the Cane Run plant \| Integer	1	2
Louisville Gas And Electric Co [Member]
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]
Number of residents that filed class action suit \| Integer			6
Number of miles within plant that would include a class of residents \| mi			4
Number of remaining unresolved Clean Air Act violation claims after July 2014 court ruling \| Integer			1
Generating units retired at the Cane Run plant \| Integer	1	2
Regulatory Issues - Electric - Reliability Standards (Numeric) [Abstract]
Maximum per day penalties for reliability violations			$ 1
Louisville Gas And Electric Co [Member] \| Power Purchase [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2016			18
2017			19
2018			19
2019			19
2020			20
Thereafter			435
Total future obligation			530
Purchases			$ 15	17	18
Louisville Gas And Electric Co [Member] \| Coal [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2022
Louisville Gas And Electric Co [Member] \| Coal Transporation And Fleeting Services [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Louisville Gas And Electric Co [Member] \| Natural Gas Storage [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Louisville Gas And Electric Co [Member] \| Natural Gas Transportation [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2026
Kentucky Utilities Co [Member]
Regulatory Issues - Electric - Reliability Standards (Numeric) [Abstract]
Maximum per day penalties for reliability violations			$ 1
Kentucky Utilities Co [Member] \| Power Purchase [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2016			8
2017			8
2018			8
2019			9
2020			9
Thereafter			193
Total future obligation			235
Purchases			$ 7	$ 8	$ 8
Kentucky Utilities Co [Member] \| Coal [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2022
Kentucky Utilities Co [Member] \| Coal Transporation And Fleeting Services [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Kentucky Utilities Co [Member] \| Natural Gas Storage [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2024
Kentucky Utilities Co [Member] \| Natural Gas Transportation [Member]
Energy Purchase Commitments (Numeric) [Abstract]
Maximum maturity date			2026