SCHEDULE I - NOTES TO CONDENSED FINANCIAL STATEMENTS (Details) (PPL Guarantee [Member], USD $)	12 Months Ended
	Dec. 31, 2011
Indemnification Guarantee [Member] | Indemnifications For Sale Of PPL Gas Utilities [Member]
Condensed Financial Statements, Captions [Line Items]
Maximum exposure	$ 300,000,000	[1],[2]
Maximum dollar amount for certain indemnification provisions	45,000,000
Minimum amount of individual claim that requires guarantor to perform	50,000
Threshold of total claims that requires guarantor to perform	4,500,000
PPL Corp [Member] | Financial Guarantee [Member] | Indemnification Of PPL Capital Funding Debt [Member]
Condensed Financial Statements, Captions [Line Items]
Maximum exposure	$ 5,200,000,000
Guarantee Expiration Date	2067

[1] Represents the estimated maximum potential amount of future payments that could be required to be made under the guarantee.

[2] PPL has provided indemnification to the purchaser of PPL Gas Utilities and Penn Fuel Propane, LLC for damages arising out of any breach of the representations, warranties and covenants under the related transaction agreement and for damages arising out of certain other matters, including certain pre-closing unknown environmental liabilities relating to former manufactured gas plant properties or off-site disposal sites, if any, outside of Pennsylvania. The indemnification provisions for most representations and warranties, including tax and environmental matters, are capped at $45 million, in the aggregate, and are triggered (i) only if the individual claim exceeds $50,000, and (ii) only if, and only to the extent that, in the aggregate, total claims exceed $4.5 million. The indemnification provisions for most representations and warranties expired on September 30, 2009 without any claims having been made. Certain representations and warranties, including those having to do with transaction authorization and title, survive indefinitely, are capped at the purchase price and are not subject to the above threshold or deductible. The indemnification provision for the tax matters representations survives for the duration of the applicable statute of limitation. The indemnification provision for the environmental matters representations expired on September 30, 2011 without any claims having been made. The indemnification for covenants survives until the applicable covenant is performed and is not subject to any cap.