Utility Rate Regulation (Tables)

3 Months Ended

Mar. 31, 2013

Utility Rate Regulation [Line Items]

Regulatory Assets

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012
Current Regulatory Assets:
	Transmission formula rate	$	5			$	5
	Gas supply clause		12	$	11
	Fuel adjustment clause		14		6
	Other		6		2
Total current regulatory assets		$	37	$	19	$	5
Noncurrent Regulatory Assets:
	Defined benefit plans	$	714	$	730	$	356	$	362
	Taxes recoverable through future rates		295		293		295		293
	Storm costs		163		168		58		59
	Unamortized loss on debt		94		96		63		65
	Interest rate swaps		62		67
	Accumulated cost of removal of utility plant		85		71		85		71
	AROs		30		26
	Other		21		32		3		3
Total noncurrent regulatory assets		$	1,464	$	1,483	$	860	$	853

		LKE				LG&E				KU
		March 31,		December 31,		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012		2013		2012
Current Regulatory Assets:
	Gas supply clause	$	12	$	11	$	12	$	11
	Fuel adjustment clause		14		6		7		6	$	7
	Other		6		2		2		2		4
Total current regulatory assets		$	32	$	19	$	21	$	19	$	11
Noncurrent Regulatory Assets:
	Defined benefit plans	$	358	$	368	$	225	$	232	$	133	$	136
	Storm costs		105		109		57		59		48		50
	Unamortized loss on debt		31		31		20		20		11		11
	Interest rate swaps		62		67		62		67
	AROs		30		26		17		15		13		11
	Other		18		29		7		7		11		22
Total noncurrent regulatory assets		$	604	$	630	$	388	$	400	$	216	$	230

Regulatory Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	27	$	28	$	27
	ECR				4
	Gas supply clause		1		4
	Transmission service charge		12		6		12		6
	Universal service rider		15		17		15		17
	Other		5		3		2		2
Total current regulatory liabilities		$	61	$	61	$	57	$	52
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	687	$	679
	Coal contracts (a)		130		141
	Power purchase agreement - OVEC (a)		107		108
	Net deferred tax assets		33		34
	Act 129 compliance rider		13		8	$	13	$	8
	Defined benefit plans		17		17
	Interest rate swaps		24		14
	Other		5		9
Total noncurrent regulatory liabilities		$	1,016	$	1,010	$	13	$	8

Current Regulatory Liabilities:
		ECR			$	4							$	4
		DSM	$	1							$	1
		Gas supply clause		1		4	$	1	$	4
		Gas line tracker		2				2
		Other				1								1
Total current regulatory liabilities			$	4	$	9	$	3	$	4	$	1	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	687	$	679	$	299	$	297	$	388	$	382
	Coal contracts (a)			130		141		57		61		73		80
	Power purchase agreement - OVEC (a)			107		108		74		75		33		33
	Net deferred tax assets			33		34		27		28		6		6
	Defined benefit plans			17		17						17		17
	Interest rate swaps			24		14		12		7		12		7
	Other			5		9		2		3		3		6
Total noncurrent regulatory liabilities			$	1,003	$	1,002	$	471	$	471	$	532	$	531

(a)       Recorded as offsets to certain intangible assets that were recorded at fair value upon the acquisition of LKE.

PPL Electric Utilities Corp [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012
Current Regulatory Assets:
	Transmission formula rate	$	5			$	5
	Gas supply clause		12	$	11
	Fuel adjustment clause		14		6
	Other		6		2
Total current regulatory assets		$	37	$	19	$	5
Noncurrent Regulatory Assets:
	Defined benefit plans	$	714	$	730	$	356	$	362
	Taxes recoverable through future rates		295		293		295		293
	Storm costs		163		168		58		59
	Unamortized loss on debt		94		96		63		65
	Interest rate swaps		62		67
	Accumulated cost of removal of utility plant		85		71		85		71
	AROs		30		26
	Other		21		32		3		3
Total noncurrent regulatory assets		$	1,464	$	1,483	$	860	$	853

		LKE				LG&E				KU
		March 31,		December 31,		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012		2013		2012
Current Regulatory Assets:
	Gas supply clause	$	12	$	11	$	12	$	11
	Fuel adjustment clause		14		6		7		6	$	7
	Other		6		2		2		2		4
Total current regulatory assets		$	32	$	19	$	21	$	19	$	11
Noncurrent Regulatory Assets:
	Defined benefit plans	$	358	$	368	$	225	$	232	$	133	$	136
	Storm costs		105		109		57		59		48		50
	Unamortized loss on debt		31		31		20		20		11		11
	Interest rate swaps		62		67		62		67
	AROs		30		26		17		15		13		11
	Other		18		29		7		7		11		22
Total noncurrent regulatory assets		$	604	$	630	$	388	$	400	$	216	$	230

Regulatory Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	27	$	28	$	27
	ECR				4
	Gas supply clause		1		4
	Transmission service charge		12		6		12		6
	Universal service rider		15		17		15		17
	Other		5		3		2		2
Total current regulatory liabilities		$	61	$	61	$	57	$	52
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	687	$	679
	Coal contracts (a)		130		141
	Power purchase agreement - OVEC (a)		107		108
	Net deferred tax assets		33		34
	Act 129 compliance rider		13		8	$	13	$	8
	Defined benefit plans		17		17
	Interest rate swaps		24		14
	Other		5		9
Total noncurrent regulatory liabilities		$	1,016	$	1,010	$	13	$	8

Current Regulatory Liabilities:
		ECR			$	4							$	4
		DSM	$	1							$	1
		Gas supply clause		1		4	$	1	$	4
		Gas line tracker		2				2
		Other				1								1
Total current regulatory liabilities			$	4	$	9	$	3	$	4	$	1	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	687	$	679	$	299	$	297	$	388	$	382
	Coal contracts (a)			130		141		57		61		73		80
	Power purchase agreement - OVEC (a)			107		108		74		75		33		33
	Net deferred tax assets			33		34		27		28		6		6
	Defined benefit plans			17		17						17		17
	Interest rate swaps			24		14		12		7		12		7
	Other			5		9		2		3		3		6
Total noncurrent regulatory liabilities			$	1,003	$	1,002	$	471	$	471	$	532	$	531

LG And E And KU Energy LLC [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012
Current Regulatory Assets:
	Transmission formula rate	$	5			$	5
	Gas supply clause		12	$	11
	Fuel adjustment clause		14		6
	Other		6		2
Total current regulatory assets		$	37	$	19	$	5
Noncurrent Regulatory Assets:
	Defined benefit plans	$	714	$	730	$	356	$	362
	Taxes recoverable through future rates		295		293		295		293
	Storm costs		163		168		58		59
	Unamortized loss on debt		94		96		63		65
	Interest rate swaps		62		67
	Accumulated cost of removal of utility plant		85		71		85		71
	AROs		30		26
	Other		21		32		3		3
Total noncurrent regulatory assets		$	1,464	$	1,483	$	860	$	853

		LKE				LG&E				KU
		March 31,		December 31,		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012		2013		2012
Current Regulatory Assets:
	Gas supply clause	$	12	$	11	$	12	$	11
	Fuel adjustment clause		14		6		7		6	$	7
	Other		6		2		2		2		4
Total current regulatory assets		$	32	$	19	$	21	$	19	$	11
Noncurrent Regulatory Assets:
	Defined benefit plans	$	358	$	368	$	225	$	232	$	133	$	136
	Storm costs		105		109		57		59		48		50
	Unamortized loss on debt		31		31		20		20		11		11
	Interest rate swaps		62		67		62		67
	AROs		30		26		17		15		13		11
	Other		18		29		7		7		11		22
Total noncurrent regulatory assets		$	604	$	630	$	388	$	400	$	216	$	230

Regulatory Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	27	$	28	$	27
	ECR				4
	Gas supply clause		1		4
	Transmission service charge		12		6		12		6
	Universal service rider		15		17		15		17
	Other		5		3		2		2
Total current regulatory liabilities		$	61	$	61	$	57	$	52
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	687	$	679
	Coal contracts (a)		130		141
	Power purchase agreement - OVEC (a)		107		108
	Net deferred tax assets		33		34
	Act 129 compliance rider		13		8	$	13	$	8
	Defined benefit plans		17		17
	Interest rate swaps		24		14
	Other		5		9
Total noncurrent regulatory liabilities		$	1,016	$	1,010	$	13	$	8

Current Regulatory Liabilities:
		ECR			$	4							$	4
		DSM	$	1							$	1
		Gas supply clause		1		4	$	1	$	4
		Gas line tracker		2				2
		Other				1								1
Total current regulatory liabilities			$	4	$	9	$	3	$	4	$	1	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	687	$	679	$	299	$	297	$	388	$	382
	Coal contracts (a)			130		141		57		61		73		80
	Power purchase agreement - OVEC (a)			107		108		74		75		33		33
	Net deferred tax assets			33		34		27		28		6		6
	Defined benefit plans			17		17						17		17
	Interest rate swaps			24		14		12		7		12		7
	Other			5		9		2		3		3		6
Total noncurrent regulatory liabilities			$	1,003	$	1,002	$	471	$	471	$	532	$	531

(a)       Recorded as offsets to certain intangible assets that were recorded at fair value upon the acquisition of LKE.

Louisville Gas And Electric Co [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012
Current Regulatory Assets:
	Transmission formula rate	$	5			$	5
	Gas supply clause		12	$	11
	Fuel adjustment clause		14		6
	Other		6		2
Total current regulatory assets		$	37	$	19	$	5
Noncurrent Regulatory Assets:
	Defined benefit plans	$	714	$	730	$	356	$	362
	Taxes recoverable through future rates		295		293		295		293
	Storm costs		163		168		58		59
	Unamortized loss on debt		94		96		63		65
	Interest rate swaps		62		67
	Accumulated cost of removal of utility plant		85		71		85		71
	AROs		30		26
	Other		21		32		3		3
Total noncurrent regulatory assets		$	1,464	$	1,483	$	860	$	853

		LKE				LG&E				KU
		March 31,		December 31,		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012		2013		2012
Current Regulatory Assets:
	Gas supply clause	$	12	$	11	$	12	$	11
	Fuel adjustment clause		14		6		7		6	$	7
	Other		6		2		2		2		4
Total current regulatory assets		$	32	$	19	$	21	$	19	$	11
Noncurrent Regulatory Assets:
	Defined benefit plans	$	358	$	368	$	225	$	232	$	133	$	136
	Storm costs		105		109		57		59		48		50
	Unamortized loss on debt		31		31		20		20		11		11
	Interest rate swaps		62		67		62		67
	AROs		30		26		17		15		13		11
	Other		18		29		7		7		11		22
Total noncurrent regulatory assets		$	604	$	630	$	388	$	400	$	216	$	230

Regulatory Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	27	$	28	$	27
	ECR				4
	Gas supply clause		1		4
	Transmission service charge		12		6		12		6
	Universal service rider		15		17		15		17
	Other		5		3		2		2
Total current regulatory liabilities		$	61	$	61	$	57	$	52
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	687	$	679
	Coal contracts (a)		130		141
	Power purchase agreement - OVEC (a)		107		108
	Net deferred tax assets		33		34
	Act 129 compliance rider		13		8	$	13	$	8
	Defined benefit plans		17		17
	Interest rate swaps		24		14
	Other		5		9
Total noncurrent regulatory liabilities		$	1,016	$	1,010	$	13	$	8

Current Regulatory Liabilities:
		ECR			$	4							$	4
		DSM	$	1							$	1
		Gas supply clause		1		4	$	1	$	4
		Gas line tracker		2				2
		Other				1								1
Total current regulatory liabilities			$	4	$	9	$	3	$	4	$	1	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	687	$	679	$	299	$	297	$	388	$	382
	Coal contracts (a)			130		141		57		61		73		80
	Power purchase agreement - OVEC (a)			107		108		74		75		33		33
	Net deferred tax assets			33		34		27		28		6		6
	Defined benefit plans			17		17						17		17
	Interest rate swaps			24		14		12		7		12		7
	Other			5		9		2		3		3		6
Total noncurrent regulatory liabilities			$	1,003	$	1,002	$	471	$	471	$	532	$	531

(a)       Recorded as offsets to certain intangible assets that were recorded at fair value upon the acquisition of LKE.

Kentucky Utilities Co [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012
Current Regulatory Assets:
	Transmission formula rate	$	5			$	5
	Gas supply clause		12	$	11
	Fuel adjustment clause		14		6
	Other		6		2
Total current regulatory assets		$	37	$	19	$	5
Noncurrent Regulatory Assets:
	Defined benefit plans	$	714	$	730	$	356	$	362
	Taxes recoverable through future rates		295		293		295		293
	Storm costs		163		168		58		59
	Unamortized loss on debt		94		96		63		65
	Interest rate swaps		62		67
	Accumulated cost of removal of utility plant		85		71		85		71
	AROs		30		26
	Other		21		32		3		3
Total noncurrent regulatory assets		$	1,464	$	1,483	$	860	$	853

		LKE				LG&E				KU
		March 31,		December 31,		March 31,		December 31,		March 31,		December 31,
		2013		2012		2013		2012		2013		2012
Current Regulatory Assets:
	Gas supply clause	$	12	$	11	$	12	$	11
	Fuel adjustment clause		14		6		7		6	$	7
	Other		6		2		2		2		4
Total current regulatory assets		$	32	$	19	$	21	$	19	$	11
Noncurrent Regulatory Assets:
	Defined benefit plans	$	358	$	368	$	225	$	232	$	133	$	136
	Storm costs		105		109		57		59		48		50
	Unamortized loss on debt		31		31		20		20		11		11
	Interest rate swaps		62		67		62		67
	AROs		30		26		17		15		13		11
	Other		18		29		7		7		11		22
Total noncurrent regulatory assets		$	604	$	630	$	388	$	400	$	216	$	230

Regulatory Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	27	$	28	$	27
	ECR				4
	Gas supply clause		1		4
	Transmission service charge		12		6		12		6
	Universal service rider		15		17		15		17
	Other		5		3		2		2
Total current regulatory liabilities		$	61	$	61	$	57	$	52
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	687	$	679
	Coal contracts (a)		130		141
	Power purchase agreement - OVEC (a)		107		108
	Net deferred tax assets		33		34
	Act 129 compliance rider		13		8	$	13	$	8
	Defined benefit plans		17		17
	Interest rate swaps		24		14
	Other		5		9
Total noncurrent regulatory liabilities		$	1,016	$	1,010	$	13	$	8

Current Regulatory Liabilities:
		ECR			$	4							$	4
		DSM	$	1							$	1
		Gas supply clause		1		4	$	1	$	4
		Gas line tracker		2				2
		Other				1								1
Total current regulatory liabilities			$	4	$	9	$	3	$	4	$	1	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	687	$	679	$	299	$	297	$	388	$	382
	Coal contracts (a)			130		141		57		61		73		80
	Power purchase agreement - OVEC (a)			107		108		74		75		33		33
	Net deferred tax assets			33		34		27		28		6		6
	Defined benefit plans			17		17						17		17
	Interest rate swaps			24		14		12		7		12		7
	Other			5		9		2		3		3		6
Total noncurrent regulatory liabilities			$	1,003	$	1,002	$	471	$	471	$	532	$	531

(a)       Recorded as offsets to certain intangible assets that were recorded at fair value upon the acquisition of LKE.