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Fair Value Measurements and Credit Concentration (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements and Credit Concentration [Line Items]

Fair Value of Assets and Liabilities Measured on Recurring Basis

The assets and liabilities measured at fair value were:

				December 31, 2012								December 31, 2011
				Total		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3
PPL
Assets
	Cash and cash equivalents			$	901	$	901					$	1,202	$	1,202
	Restricted cash and cash equivalents (a)				135		135						209		209
	Price risk management assets:
		Energy commodities			2,068		2	$	2,037	$	29		3,423		3	$	3,390	$	30
		Interest rate swaps			15				15				3				3
		Foreign currency contracts											18				18
		Cross-currency swaps			14				13		1		24				20		4
	Total price risk management assets				2,097		2		2,065		30		3,468		3		3,431		34
	NDT funds:
		Cash and cash equivalents			11		11						12		12
		Equity securities
			U.S. large-cap		412		308		104				357		267		90
			U.S. mid/small-cap		60		25		35				52		22		30
		Debt securities
			U.S. Treasury		95		95						86		86
			U.S. government sponsored agency		9				9				10				10
			Municipality		82				82				83				83
			Investment-grade corporate		40				40				38				38
			Other		3				3				2				2
		Receivables (payables), net					(2)		2						(3)		3
	Total NDT funds				712		437		275				640		384		256
	Auction rate securities (b)				19				3		16		24						24
Total assets				$	3,864	$	1,475	$	2,343	$	46	$	5,543	$	1,798	$	3,687	$	58

Liabilities
	Price risk management liabilities:
		Energy commodities		$	1,566	$	2	$	1,557	$	7	$	2,345		1	$	2,327	$	17
		Interest rate swaps			80				80				63				63
		Foreign currency contracts			44				44
		Cross-currency swaps			4				4				2				2
	Total price risk management liabilities			$	1,694	$	2	$	1,685	$	7	$	2,410		1	$	2,392	$	17

PPL Energy Supply
Assets
	Cash and cash equivalents			$	413	$	413					$	379	$	379
	Restricted cash and cash equivalents (a)				63		63						145		145
	Price risk management assets:
		Energy commodities			2,068		2	$	2,037	$	29		3,423		3	$	3,390	$	30
	Total price risk management assets				2,068		2		2,037		29		3,423		3		3,390		30
	NDT funds:
		Cash and cash equivalents			11		11						12		12
		Equity securities
			U.S. large-cap		412		308		104				357		267		90
			U.S. mid/small-cap		60		25		35				52		22		30
		Debt securities
			U.S. Treasury		95		95						86		86
			U.S. government sponsored agency		9				9				10				10
			Municipality		82				82				83				83
			Investment-grade corporate		40				40				38				38
			Other		3				3				2				2
		Receivables (payables), net					(2)		2						(3)		3
	Total NDT funds				712		437		275				640		384		256
	Auction rate securities (b)				16				3		13		19						19
Total assets				$	3,272	$	915	$	2,315	$	42	$	4,606	$	911	$	3,646	$	49

Liabilities
	Price risk management liabilities:
		Energy commodities		$	1,566	$	2	$	1,557	$	7	$	2,345	$	1	$	2,327	$	17
	Total price risk management liabilities			$	1,566	$	2	$	1,557	$	7	$	2,345	$	1	$	2,327	$	17

PPL Electric
Assets
	Cash and cash equivalents			$	140	$	140					$	320	$	320
	Restricted cash and cash equivalents (c)				13		13						13		13
Total assets				$	153	$	153					$	333	$	333

LKE
Assets
	Cash and cash equivalents		$	43	$	43			$	59	$	59
	Restricted cash and cash equivalents (d)			32		32				29		29
	Price risk management assets:
		Interest rate swaps		14			$	14
	Total price risk management assets			14				14
Total assets			$	89	$	75	$	14	$	88	$	88

Liabilities
	Price risk management liabilities:
		Interest rate swaps (e)	$	58			$	58	$	60			$	60
	Total price risk management liabilities		$	58			$	58	$	60			$	60

LG&E
Assets
	Cash and cash equivalents		$	22	$	22			$	25	$	25
	Restricted cash and cash equivalents (d)			32		32				29		29
	Price risk management assets:
		Interest rate swaps		7			$	7
	Total price risk management assets			7				7
Total assets			$	61	$	54	$	7	$	54	$	54

Liabilities
	Price risk management liabilities:
		Interest rate swaps (e)	$	58			$	58	$	60			$	60
	Total price risk management liabilities		$	58			$	58	$	60			$	60

KU
Assets
	Cash and cash equivalents		$	21	$	21			$	31	$	31
	Price risk management assets:
		Interest rate swaps		7			$	7
	Total price risk management assets			7				7
Total assets			$	28	$	21	$	7	$	31	$	31

(a) Current portion is included in "Restricted cash and cash equivalents" and long-term portion is included in "Other noncurrent assets" on the Balance Sheets.

(b) Included in "Other investments" on the Balance Sheets.

(c) Current portion is included in "Other current assets" and the long-term portion is included in "Other noncurrent assets" on the Balance Sheets.

(d) Included in "Other noncurrent assets" on the Balance Sheets.

(e) Current portion is included in "Other current liabilities" on the Balance Sheets. The long-term portion is included in "Price risk management liabilities" on the Balance Sheets.

Reconciliation of Net Assets and Liabilities Classified as Level 3

A reconciliation of net assets and liabilities classified as Level 3 for the years ended is as follows:

			PPL
			Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
			Energy		Auction		Cross-
			Commodities,		Rate		Currency
			net		Securities		Swaps		Total
December 31, 2012
Balance at beginning of period			$	13	$	24	$	4	$	41
	Total realized/unrealized gains (losses)
		Included in earnings		2				(1)		1
		Included in OCI (a)		1				1		2
	Sales					(5)				(5)
	Settlements			(13)						(13)
	Transfers into Level 3			8						8
	Transfers out of Level 3			11		(3)		(3)		5
Balance at end of period			$	22	$	16	$	1	$	39

December 31, 2011
Balance at beginning of period			$	(3)	$	25			$	22
	Total realized/unrealized gains (losses)
		Included in earnings		(65)						(65)
		Included in OCI (a)		(1)		(1)	$	(10)		(12)
	Purchases			1						1
	Sales			(3)						(3)
	Settlements			20						20
	Transfers into Level 3			(10)				14		4
	Transfers out of Level 3			74						74
Balance at end of period			$	13	$	24	$	4	$	41

(a) "Energy Commodities" and "Cross-Currency Swaps" are included in "Qualifying derivatives" and "Auction Rate Securities" are included in "Available-for-sale securities" on the Statements of Comprehensive Income.

Significant Unobservable Inputs Used in Fair Value Measurement of Assets and Liabilities Classified as Level 3

The significant unobservable inputs used in the fair value measurement of assets and liabilities classified as Level 3 at December 31, 2012 are as follows:

Quantitative Information about Level 3 Fair Value Measurements

Fair Value, net

Range

Asset

Valuation

Unobservable

(Weighted

(Liability)

Technique

Input(s)

Average) (a)

PPL

Energy commodities

Retail natural gas sales contracts (b)

Discounted cash flow

Observable wholesale prices used as proxy for retail delivery points

21% - 100% (75%)

Power sales contracts (c)

(4)

Discounted cash flow

Proprietary model used to calculate forward basis prices

24% (24%)

FTR purchase contracts (d)

Discounted cash flow

Historical settled prices used to model forward prices

100% (100%)

Auction rate securities (e)

Discounted cash flow

Modeled from SIFMA Index

54% - 74% (64%)

Cross-currency swaps (f)

Discounted cash flow

Credit valuation adjustment

22% (22%)

PPL Energy Supply

Energy commodities

Retail natural gas sales contracts (b)

Discounted cash flow

Observable wholesale prices used as proxy for retail delivery points

21% - 100% (75%)

Power sales contracts (c)

(4)

Discounted cash flow

Proprietary model used to calculate forward basis prices

24% (24%)

FTR purchase contracts (d)

Discounted cash flow

Historical settled prices used to model forward prices

100% (100%)

Auction rate securities (e)

Discounted cash flow

Modeled from SIFMA Index

57% - 74% (65%)

(a) For energy commodities and auction rate securities, the range and weighted average represent the percentage of fair value derived from the unobservable inputs. For cross-currency swaps, the range and weighted average represent the percentage decrease in fair value due to the unobservable inputs used in the model to calculate the credit valuation adjustment.

(b) Retail natural gas sales contracts extend into 2017. $11 million of the fair value is scheduled to deliver within the next 12 months. As the forward price of natural gas increases/(decreases), the fair value of the contracts (decreases)/increases.

(c) Power sales contracts extend into 2014. $(4) million of the fair value is scheduled to deliver within the next 12 months. As the forward price of basis increases/(decreases), the fair value of the contracts (decreases)/increases.

(d) FTR purchase contracts extend into 2015. $2 million of the fair value is scheduled to deliver within the next 12 months. As the forward implied spread increases/(decreases), the fair value of the contracts increases/(decreases).

(e) Auction rate securities have a weighted average contractual maturity of 23 years. The model used to calculate fair value incorporates an assumption that the auctions will continue to fail. As the modeled forward rates of the SIFMA Index increase/(decrease), the fair value of the securities increases/(decreases).

(f) Cross-currency swaps extend into 2017. The credit valuation adjustment incorporates projected probabilities of default and estimated recovery rates. As the credit valuation adjustment increases/(decreases), the fair value of the swaps (decreases)/increases.

The significant unobservable inputs used in the nonrecurring fair value measurement of assets and liabilities classified as Level 3 at December 31, 2012 are as follows:

Quantitative Information about Level 3 Fair Value Measurements

Fair Value, net

Range

Asset

Valuation

Unobservable

(Weighted

(Liability)

Technique

Input(s)

Average)

PPL, LKE, and KU

Equity investment in EEI

Discounted cash flow

Long-term forward price curves and capital expenditure projections

100% (100%)

Fair Value of Assets and Liabilities Classified as Level 3 Measured on Recurring Basis Included in Earnings

Net gains and losses on assets and liabilities classified as Level 3 and included in earnings for the years ended December 31 were reported in the Statements of Income as follows:

																			Cross-Currency
		Energy Commodities, net																	Swaps

		Unregulated Retail					Wholesale Energy				Net Energy				Energy				Interest
		Electric and Gas					Marketing				Trading Margins				Purchases				Expense
		2012			2011		2012		2011		2012		2011		2012		2011		2012		2011
PPL
Total gains (losses) included in earnings			$	26	$	32	$	(7)			$	(12)	$	(1)	$	(5)	$	(96)	$	(1)
Change in unrealized gains (losses) relating to
	positions still held at the reporting date			29		23		(4)	$	5		1		1		1		(2)

PPL Energy Supply
Total gains (losses) included in earnings				26		32		(7)				(12)		(1)		(5)		(96)
Change in unrealized gains (losses) relating to
	positions still held at the reporting date			29		23		(4)		5		1		1		1		(2)

Fair Value of Assets and Liabilities Measured on Nonrecurring Basis

The following nonrecurring fair value measurements occurred during the reporting periods, resulting in asset impairments.

			Carrying		Fair Value Measurements Using
			Amount (a)		Level 2		Level 3		Loss (b)
PPL, LKE and KU
	Equity investment in EEI:
		December 31, 2012	$	25					$	25
PPL and PPL Energy Supply
	Sulfur dioxide emission allowances (c):
		December 31, 2010		2			$	1		1
		September 30, 2010		6				2		4
		June 30, 2010		11				3		8
		March 31, 2010		13				10		3
	RECs (c):
		September 30, 2011		1						1
		June 30, 2011		2	$	1				1
		March 31, 2011		3						3
	Certain non-core generation facilities:
		September 30, 2010		473		381				96

(a) Represents carrying value before fair value measurement.

(b) The loss on the EEI investment was recorded in the Kentucky Regulated segment and included in "Other-Than-Temporary Impairments" on the Statement of Income. Losses on sulfur dioxide emission allowances and RECs were recorded in the Supply segment and included in "Other operation and maintenance" on the Statements of Income. Losses on certain non-core generation facilities were recorded in the Supply segment and included in "Income (Loss) from Discontinued Operations (net of income taxes)" on the Statement of Income.

(c) Current and long-term sulfur dioxide emission allowances and RECs are included in "Other current assets" and "Other intangibles" in their respective areas on the Balance Sheets.

Fair Value of Financial Instruments Not Recorded at Fair Value - Other

The carrying amounts of contract adjustment payments related to the Purchase Contract component of the Equity Units and long-term debt on the Balance Sheets and their estimated fair values are set forth below.

		December 31, 2012				December 31, 2011
		Carrying				Carrying
		Amount		Fair Value		Amount		Fair Value
PPL
	Contract adjustment payments (a)	$	105	$	106	$	198	$	198
	Long-term debt		19,476		21,671		17,993		19,392
PPL Energy Supply
	Long-term debt		3,272		3,556		3,024		3,397
PPL Electric
	Long-term debt		1,967		2,333		1,718		2,012

LKE
	Long-term debt	4,075	4,423	4,073	4,306
LG&E
	Long-term debt	1,112	1,178	1,112	1,164
KU
	Long-term debt	1,842	2,056	1,842	2,000

(a) Included in "Other current liabilities" and "Other deferred credits and noncurrent liabilities" on the Balance Sheets.

PPL Energy Supply LLC [Member]

Fair Value Measurements and Credit Concentration [Line Items]

Reconciliation of Net Assets and Liabilities Classified as Level 3

A reconciliation of net assets and liabilities classified as Level 3 for the years ended is as follows:

			PPL Energy Supply
			Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
			Energy		Auction
			Commodities,		Rate
			net		Securities		Total
December 31, 2012
Balance at beginning of period			$	13	$	19	$	32
	Total realized/unrealized gains (losses)
		Included in earnings		2				2
		Included in OCI (a)		1				1
	Sales					(3)		(3)
	Settlements			(13)				(13)
	Transfers into Level 3			8				8
	Transfers out of Level 3			11		(3)		8
Balance at end of period			$	22	$	13	$	35

December 31, 2011
Balance at beginning of period			$	(3)	$	20	$	17
	Total realized/unrealized gains (losses)
		Included in earnings		(65)				(65)
		Included in OCI (a)		(1)		(1)		(2)
	Purchases			1				1
	Sales			(3)				(3)
	Settlements			20				20
	Transfers into Level 3			(10)				(10)
	Transfers out of Level 3			74				74
Balance at end of period			$	13	$	19	$	32

(a) "Energy Commodities" are included in "Qualifying derivatives" and "Auction Rate Securities" are included in "Available-for-sale securities" on the Statements of Comprehensive Income.

Significant Unobservable Inputs Used in Fair Value Measurement of Assets and Liabilities Classified as Level 3

The significant unobservable inputs used in the fair value measurement of assets and liabilities classified as Level 3 at December 31, 2012 are as follows:

Quantitative Information about Level 3 Fair Value Measurements

Fair Value, net

Range

Asset

Valuation

Unobservable

(Weighted

(Liability)

Technique

Input(s)

Average) (a)

PPL

Energy commodities

Retail natural gas sales contracts (b)

Discounted cash flow

Observable wholesale prices used as proxy for retail delivery points

21% - 100% (75%)

Power sales contracts (c)

(4)

Discounted cash flow

Proprietary model used to calculate forward basis prices

24% (24%)

FTR purchase contracts (d)

Discounted cash flow

Historical settled prices used to model forward prices

100% (100%)

Auction rate securities (e)

Discounted cash flow

Modeled from SIFMA Index

54% - 74% (64%)

Cross-currency swaps (f)

Discounted cash flow

Credit valuation adjustment

22% (22%)

PPL Energy Supply

Energy commodities

Retail natural gas sales contracts (b)

Discounted cash flow

Observable wholesale prices used as proxy for retail delivery points

21% - 100% (75%)

Power sales contracts (c)

(4)

Discounted cash flow

Proprietary model used to calculate forward basis prices

24% (24%)

FTR purchase contracts (d)

Discounted cash flow

Historical settled prices used to model forward prices

100% (100%)

Auction rate securities (e)

Discounted cash flow

Modeled from SIFMA Index

57% - 74% (65%)

Fair Value of Assets and Liabilities Classified as Level 3 Measured on Recurring Basis Included in Earnings

Net gains and losses on assets and liabilities classified as Level 3 and included in earnings for the years ended December 31 were reported in the Statements of Income as follows:

																			Cross-Currency
		Energy Commodities, net																	Swaps

		Unregulated Retail					Wholesale Energy				Net Energy				Energy				Interest
		Electric and Gas					Marketing				Trading Margins				Purchases				Expense
		2012			2011		2012		2011		2012		2011		2012		2011		2012		2011
PPL
Total gains (losses) included in earnings			$	26	$	32	$	(7)			$	(12)	$	(1)	$	(5)	$	(96)	$	(1)
Change in unrealized gains (losses) relating to
	positions still held at the reporting date			29		23		(4)	$	5		1		1		1		(2)

PPL Energy Supply
Total gains (losses) included in earnings				26		32		(7)				(12)		(1)		(5)		(96)
Change in unrealized gains (losses) relating to
	positions still held at the reporting date			29		23		(4)		5		1		1		1		(2)

Fair Value of Assets and Liabilities Measured on Nonrecurring Basis

The following nonrecurring fair value measurements occurred during the reporting periods, resulting in asset impairments.

			Carrying		Fair Value Measurements Using
			Amount (a)		Level 2		Level 3		Loss (b)
PPL, LKE and KU
	Equity investment in EEI:
		December 31, 2012	$	25					$	25
PPL and PPL Energy Supply
	Sulfur dioxide emission allowances (c):
		December 31, 2010		2			$	1		1
		September 30, 2010		6				2		4
		June 30, 2010		11				3		8
		March 31, 2010		13				10		3
	RECs (c):
		September 30, 2011		1						1
		June 30, 2011		2	$	1				1
		March 31, 2011		3						3
	Certain non-core generation facilities:
		September 30, 2010		473		381				96

(a) Represents carrying value before fair value measurement.

(c) Current and long-term sulfur dioxide emission allowances and RECs are included in "Other current assets" and "Other intangibles" in their respective areas on the Balance Sheets.

LG And E And KU Energy LLC [Member]

Fair Value Measurements and Credit Concentration [Line Items]

Significant Unobservable Inputs Used in Fair Value Measurement of Assets and Liabilities Classified as Level 3

The significant unobservable inputs used in the nonrecurring fair value measurement of assets and liabilities classified as Level 3 at December 31, 2012 are as follows:

Quantitative Information about Level 3 Fair Value Measurements

Fair Value, net

Range

Asset

Valuation

Unobservable

(Weighted

(Liability)

Technique

Input(s)

Average)

PPL, LKE, and KU

Equity investment in EEI

Discounted cash flow

Long-term forward price curves and capital expenditure projections

100% (100%)

Fair Value of Assets and Liabilities Measured on Nonrecurring Basis

The following nonrecurring fair value measurements occurred during the reporting periods, resulting in asset impairments.

			Carrying		Fair Value Measurements Using
			Amount (a)		Level 2		Level 3		Loss (b)
PPL, LKE and KU
	Equity investment in EEI:
		December 31, 2012	$	25					$	25
PPL and PPL Energy Supply
	Sulfur dioxide emission allowances (c):
		December 31, 2010		2			$	1		1
		September 30, 2010		6				2		4
		June 30, 2010		11				3		8
		March 31, 2010		13				10		3
	RECs (c):
		September 30, 2011		1						1
		June 30, 2011		2	$	1				1
		March 31, 2011		3						3
	Certain non-core generation facilities:
		September 30, 2010		473		381				96

Kentucky Utilities Co [Member]

Fair Value Measurements and Credit Concentration [Line Items]

Significant Unobservable Inputs Used in Fair Value Measurement of Assets and Liabilities Classified as Level 3

The significant unobservable inputs used in the nonrecurring fair value measurement of assets and liabilities classified as Level 3 at December 31, 2012 are as follows:

Quantitative Information about Level 3 Fair Value Measurements

Fair Value, net

Range

Asset

Valuation

Unobservable

(Weighted

(Liability)

Technique

Input(s)

Average)

PPL, LKE, and KU

Equity investment in EEI

Discounted cash flow

Long-term forward price curves and capital expenditure projections

100% (100%)

Fair Value of Assets and Liabilities Measured on Nonrecurring Basis

The following nonrecurring fair value measurements occurred during the reporting periods, resulting in asset impairments.

			Carrying		Fair Value Measurements Using
			Amount (a)		Level 2		Level 3		Loss (b)
PPL, LKE and KU
	Equity investment in EEI:
		December 31, 2012	$	25					$	25
PPL and PPL Energy Supply
	Sulfur dioxide emission allowances (c):
		December 31, 2010		2			$	1		1
		September 30, 2010		6				2		4
		June 30, 2010		11				3		8
		March 31, 2010		13				10		3
	RECs (c):
		September 30, 2011		1						1
		June 30, 2011		2	$	1				1
		March 31, 2011		3						3
	Certain non-core generation facilities:
		September 30, 2010		473		381				96

- Definition

Tabular disclosure of the amount of gains or losses for the period included in earnings or resulted in a change to net assets, have arisen from the use of significant unobservable inputs (level 3) to measure the fair value of assets, liabilities, and financial instruments classified in shareholders' equity.

+ References+ Details

- Definition

Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3).

+ References+ Details

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 14

-Subparagraph a

-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.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph c(2), d, e, f

-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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 15

-Subparagraph b-d

-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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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+ Details