Other Income (Expense) - net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income [Line Items]
Earnings on securities in nuclear decommissioning trust funds	$ 23	$ 22	$ 24
Interest income	3	5	7
Allowance for funds used during construction - equity component	10	10	7
Net hedge gains associated with the 2011 Bridge Facility			55	[1]
Gain on redemption of debt			22	[2]
Earnings (losses) from equity method investments		(8)	1
Miscellaneous - Domestic	18	11	10
Miscellaneous - United Kingdom		2	1
Other income	54	42	127
Other Expense [Line Items]
Economic foreign currency exchange contracts	38	52	(10)
Charitable contributions	25	10	9
WPD Midlands acquisition-related costs			34
Foreign currency loss on 2011 Bridge Facility			57
United Kingdom stamp duty tax			21
Miscellaneous - Domestic	12	16	9
Miscellaneous - United Kingdom	2	3	3
Other expense	77	81	123
Other Income (Expense) - net	(23)	(39)	4
Extinguishment of notes [Abstract]
Interest rate on debt related to discontinuance of fair value hedge			7.125%
PPL Energy Supply LLC [Member]
Other Income [Line Items]
Earnings on securities in nuclear decommissioning trust funds	23	22	24
Interest income		1	1
Miscellaneous - Domestic	14	5	6
Other income	37	28	31
Other Expense [Line Items]
Charitable contributions	4	3	3
Miscellaneous - Domestic	3	7	5
Other expense	7	10	8
Other Income (Expense) - net	30	18	23
PPL Electric Utilities Corp [Member]
Other Expense [Line Items]
Other Income (Expense) - net	6	9	7
LG And E And KU Energy LLC [Member]
Other Expense [Line Items]
Other Income (Expense) - net	(7)	(15)	(1)
Louisville Gas And Electric Co [Member]
Other Expense [Line Items]
Other Income (Expense) - net	(2)	(3)	(2)
Kentucky Utilities Co [Member]
Other Expense [Line Items]
Other Income (Expense) - net	$ (3)	$ (8)	$ (1)

[1] Represents a gain on foreign currency contracts that hedged the repayment of the 2011 Bridge Facility borrowing.

[2] In July 2011, as a result of PPL Electric’s redemption of 7.125% Senior Secured Bonds due 2013, PPL recorded a gain on the accelerated amortization of the fair value adjustment to the debt recorded in connection with previously settled fair value hedges.