The capacity of the company's baseload generation fleet.

No definition available.

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- Definition

Obligation to return cash collateral received from counterparties under terms of master netting arrangements.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of cash collateral posted under master netting arrangements.

+ References

No definition available.

+ Details

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Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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- Details

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- Definition

The capacity of the company's intermediate and peaking generation fleet.

+ References

No definition available.

+ Details

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- Details

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- Definition

Maximum length of time over which the entity is economically hedging its exposure to the variability in future cash flows for forecasted transactions.

+ References

No definition available.

+ Details

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- Definition

A disclosure of an assertion that the amount of net gains (losses) reclassified into earnings when price risk cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period is insignificant or zero.

+ References

No definition available.

+ Details

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- Definition

Assertion that the amount of price risk cash flow hedge ineffectiveness is immaterial.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Derivative Instruments and Hedging Activities (Intro) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 MW	Jun. 30, 2012	Jun. 30, 2013 MW	Jun. 30, 2012	Dec. 31, 2012
Master Netting Arrangements Numeric [Line Items]
Obligation to return cash collateral obligation under master netting arrangement	$ 31		$ 31		$ 112
Cash collateral posted under master netting arrangements	22		22		32
Commodity Price Risk Nontrading [Line Items]
Baseload generation fleet capacity (in MW)	7,298		7,298
Intermediate and peaking generation fleet capacity (in MW)	3,316		3,316
Commodity Price Risk (Non-trading) - Cash Flow Hedges (Numeric) [Abstract]
Net unrealized after-tax gains (losses) expected to be reclassified into earnings within 12 months related to commodity price risk cash flow hedge contracts	71		71
No or insignificant amounts previously recorded in AOCI reclassified to earnings related to commodity price risk cash flow hedge contracts	insignificant	insignificant	insignificant	insignificant
No or immaterial hedge ineffectiveness related to commodity price risk cash flow hedge contracts	insignificant	insignificant	insignificant	insignificant
Commodity Price Risk (Non-trading) - Economic Activity (Numeric) [Abstract]
Year of expiration of the maximum maturity date of economic activity derivative contracts			2019
PPL Energy Supply LLC [Member]
Master Netting Arrangements Numeric [Line Items]
Obligation to return cash collateral obligation under master netting arrangement	31		31		112
Commodity Price Risk Nontrading [Line Items]
Baseload generation fleet capacity (in MW)	7,298		7,298
Intermediate and peaking generation fleet capacity (in MW)	3,316		3,316
Commodity Price Risk (Non-trading) - Cash Flow Hedges (Numeric) [Abstract]
Net unrealized after-tax gains (losses) expected to be reclassified into earnings within 12 months related to commodity price risk cash flow hedge contracts	71		71
No or insignificant amounts previously recorded in AOCI reclassified to earnings related to commodity price risk cash flow hedge contracts	insignificant	insignificant	insignificant	insignificant
No or immaterial hedge ineffectiveness related to commodity price risk cash flow hedge contracts	insignificant	insignificant	insignificant	insignificant
Commodity Price Risk (Non-trading) - Economic Activity (Numeric) [Abstract]
Year of expiration of the maximum maturity date of economic activity derivative contracts			2019
LG And E And KU Energy LLC [Member]
Master Netting Arrangements Numeric [Line Items]
Cash collateral posted under master netting arrangements	22		22		32
Louisville Gas And Electric Co [Member]
Master Netting Arrangements Numeric [Line Items]
Cash collateral posted under master netting arrangements	$ 22		$ 22		$ 32