Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2011

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation Roll Forward

The changes in the carrying amounts of AROs were:

		PPL				PPL Energy Supply
		2011		2010		2011		2010
ARO at beginning of period		$	448	$	426	$	345	$	426
	Accretion expense		33		32		26		31
	Obligations assumed in acquisition of LKE				103
	Obligations assumed in acquisition of WPD Midlands (a)		15
	Derecognition (b)						(5)
	Obligations incurred		14		4		11		4
	Changes in estimated cash flow or settlement date		5		(100)		(1)		(100)
	Obligations settled		(18)		(17)		(17)		(16)
ARO at end of period		$	497	$	448	$	359	$	345

(a)       Obligations required under U.K. law related to treated wood poles, gas-filled switchgear and fluid-filled cables. See Note 10for additional information on the acquisition.

Asset Retirement Obligation Balance Classification

The classification of AROs on the Balance Sheets was as follows.
		December 31, 2011
				PPL Energy
		PPL		Supply		LKE		LG&E		KU
Current portion (a)		$	13	$	10	$	2	$	2
Long-term portion (b)			484		349		116		55	$	61
	Total	$	497	$	359	$	118	$	57	$	61
		December 31, 2010
				PPL Energy
		PPL		Supply		LKE		LG&E		KU
Current portion (a)		$	13	$	13
Long-term portion (b)			435		332	$	103	$	49	$	54
	Total	$	448	$	345	$	103	$	49	$	54

(a)       Included in "Other current liabilities."