Available-for-Sale Securities (Tables)

12 Months Ended

Dec. 31, 2011

Available-for-Sale Securities [Abstract]

Available-for-Sale Securities

The following table shows the amortized cost, the gross unrealized gains and losses recorded in AOCI and the fair value of available-for-sale securities.

						December 31, 2011								December 31, 2010
								Gross		Gross						Gross		Gross
						Amortized		Unrealized		Unrealized				Amortized		Unrealized		Unrealized
						Cost		Gains		Losses		Fair Value		Cost		Gains		Losses	Fair Value
PPL
	Short-term investments
		- municipal debt securities (a)												$	163				$	163
	NDT funds:
			Cash and cash equivalents			$	12					$	12		10					10
			Equity securities:
				U.S. large-cap			173	$	119				292		180	$	123			303
				U.S. mid/small-cap			67		50				117		67		52			119
			Debt securities:
				U.S. Treasury			76		10				86		71		4			75
				U.S. government sponsored
					agency		9		1				10		6		1			7
				Municipality			80		4	$	1		83		69					69
				Investment-grade corporate			35		3				38		31		2			33
				Other			2						2		1					1
			Receivables/payables, net												1					1
			Total NDT funds				454		187		1		640		436		182			618
	Auction rate securities						25				1		24		25					25
	Total					$	479	$	187	$	2	$	664	$	624	$	182		$	806
PPL Energy Supply
	NDT funds:
			Cash and cash equivalents			$	12					$	12	$	10				$	10
			Equity securities:
				U.S. large-cap			173	$	119				292		180	$	123			303
				U.S. mid/small-cap			67		50				117		67		52			119
			Debt securities:
				U.S. Treasury			76		10				86		71		4			75
				U.S. government sponsored
					agency		9		1				10		6		1			7
				Municipality			80		4	$	1		83		69					69
				Investment-grade corporate			35		3				38		31		2			33
				Other			2						2		1					1
			Receivables/payables, net												1					1
			Total NDT funds				454		187		1		640		436		182			618
	Auction rate securities						20				1		19		20					20
	Total					$	474	$	187	$	2	$	659	$	456	$	182		$	638

(a)       Represents tax-exempt bonds issued by Louisville/Jefferson County, Kentucky, on behalf of LG&E that were subsequently purchased by LG&E.

Such bonds were remarketed to unaffiliated investors in January 2011.

Scheduled Maturity Dates of Debt Securities

The following table shows the scheduled maturity dates of debt securities held at December 31, 2011.

	Maturity		Maturity		Maturity		Maturity
	Less Than		1-5		5-10		in Excess
	1 Year		Years		Years		of 10 Years		Total
PPL
Amortized cost	$	14	$	69	$	62	$	82	$	227
Fair value		14		72		67		90		243
PPL Energy Supply
Amortized cost	$	14	$	69	$	62	$	77	$	222
Fair value		14		72		67		85		238

Proceeds From and Realized Gains and Losses on Sales of Available-for-sale Securities

The following table shows proceeds from and realized gains and losses on sales of available-for-sale securities.
	2011		2010		2009
PPL
Proceeds from sales of NDT securities (a)	$	156	$	114	$	201
Other proceeds from sales		163				154
Gross realized gains (b)		28		13		27
Gross realized losses (b)		16		5		20
PPL Energy Supply
Proceeds from sales of NDT securities (a)	$	156	$	114	$	201
Other proceeds from sales						154
Gross realized gains (b)		28		13		27
Gross realized losses (b)		16		5		20

(a)       These proceeds are used to pay income taxes and fees related to managing the trust. Remaining proceeds are reinvested in the trust.

(b)       Excludes the impact of other-than-temporary impairment charges recognized in the Statements of Income.