Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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+ References

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- Definition

The cash outflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation.

+ References

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Total exposure hedged through a combination of average rate forwards and average rate options foreign currency contracts for anticipated earnings hedges classified as economic activity.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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Disclosure of an assertion that the amount of interest rate cash flow hedge ineffectiveness is immaterial.

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Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

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Derivative Instruments and Hedging Activities (Risk Disclosures) (Details) £ in Millions, $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2015 GBP (£)	Sep. 30, 2015 USD ($)
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Settlement of interest rate swaps	$ 88	$ 0
First Mortgage Bond [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Principal amount					$ 1,050
Cash Flow Hedges [Member] \| Interest Rate Swap Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					792
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Insignificant or no hedge ineffectiveness associated with interest rate cash flow hedges	For the three months ended September 30, 2015, PPL had an insignificant amount of hedge ineffectiveness associated with interest rate derivatives and no hedge ineffectiveness for the three months ended September 30, 2014. For the nine months ended September 30, 2015 and 2014, PPL had an insignificant amount of hedge ineffectiveness associated with interest rate derivatives.
No or insignificant unrealized after-tax gains (losses) on interest rate cash flow hedge contracts expected to be reclassified into earnings during next 12 months	At September 30, 2015, the accumulated net unrecognized after-tax gains (losses) on qualifying derivatives that are expected to be reclassified into earnings during the next 12 months were insignificant.
Cash Flow Hedges [Member] \| Cross Currency Interest Rate Swaps [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					1,300
Economic Hedges [Member] \| Interest Rate Swap Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					179
Economic Hedges [Member] \| Foreign Currency Contracts [Member]
Foreign Currency Risk - Economic Activity (Numeric) [Abstract]
Total exposure hedged related to foreign currency contracts for anticipated earnings hedges classified as economic activity				£ 1,700	2,700
Net Investment Hedges [Member] \| Foreign Currency Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount				134	221
Net Investment Hedges [Member] \| Combined Foreign Currency Contracts And Intercompany Loans [Member]
Foreign Currency Risk - Net Investment Hedges (Numeric) [Abstract]
Net after tax gains (losses) on net investment hedges recognized in the foreign currency translation adjustment component of AOCI	$ 18		$ 14
WPD [Member] \| Cash Flow Hedges [Member] \| Interest Rate Swap Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount				£ 320	492
LG And E And KU Energy LLC [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Settlement of interest rate swaps	88	0
LG And E And KU Energy LLC [Member] \| First Mortgage Bond [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Principal amount					1,050
LG And E And KU Energy LLC [Member] \| Economic Hedges [Member] \| Interest Rate Swap Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					179
Louisville Gas And Electric Co [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Settlement of interest rate swaps	44	0
Louisville Gas And Electric Co [Member] \| First Mortgage Bond [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Principal amount					550
Louisville Gas And Electric Co [Member] \| Economic Hedges [Member] \| Interest Rate Swap Contracts [Member]
Interest Rate Risk And Foreign Currency Risk [Line Items]
Notional amount					179
Kentucky Utilities Co [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Settlement of interest rate swaps	$ 44	$ 0
Kentucky Utilities Co [Member] \| First Mortgage Bond [Member]
Interest Rate Risk - Cash Flow Hedges (Numeric) [Abstract]
Principal amount					$ 500