Utility Rate Regulation (Tables)

12 Months Ended

Dec. 31, 2012

Utility Rate Regulation [Line Items]

Regulatory Assets

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

		PPL				PPL Electric
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6
	Fuel adjustment clause		6		3
	Other		2
Total current regulatory assets		$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	730	$	615	$	362	$	276
	Taxes recoverable through future rates		293		289		293		289
	Storm costs		168		154		59		31
	Unamortized loss on debt		96		110		65		77
	Interest rate swaps		67		69
	Accumulated cost of removal of utility plant		71		53		71		53
	Coal contracts (a)		4		11
	AROs		26		18
	Other		28		30		3		3
Total noncurrent regulatory assets		$	1,483	$	1,349	$	853	$	729

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

Regulatory Liabilities

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

Current Regulatory Liabilities:
	Generation supply charge	$	27	$	42	$	27	$	42
	ECR		4		7
	Gas supply clause		4		6
	Transmission service charge		6		2		6		2
	Transmission formula rate				5				5
	Universal Service Rider		17		1		17		1
	Other		3		10		2		3
Total current regulatory liabilities		$	61	$	73	$	52	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	679	$	651
	Coal contracts (a)		141		180
	Power purchase agreement - OVEC (a)		108		116
	Net deferred tax assets		34		39
	Act 129 compliance rider		8		7	$	8	$	7
	Defined benefit plans		17		9
	Interest rate swaps		14
	Other		9		8
Total noncurrent regulatory liabilities		$	1,010	$	1,010	$	8	$	7

(a)       These regulatory assets and liabilities were recorded as offsets to certain intangible assets and liabilities 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 tables provide information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6
	Fuel adjustment clause		6		3
	Other		2
Total current regulatory assets		$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	730	$	615	$	362	$	276
	Taxes recoverable through future rates		293		289		293		289
	Storm costs		168		154		59		31
	Unamortized loss on debt		96		110		65		77
	Interest rate swaps		67		69
	Accumulated cost of removal of utility plant		71		53		71		53
	Coal contracts (a)		4		11
	AROs		26		18
	Other		28		30		3		3
Total noncurrent regulatory assets		$	1,483	$	1,349	$	853	$	729

Regulatory Liabilities

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

Current Regulatory Liabilities:
	Generation supply charge	$	27	$	42	$	27	$	42
	ECR		4		7
	Gas supply clause		4		6
	Transmission service charge		6		2		6		2
	Transmission formula rate				5				5
	Universal Service Rider		17		1		17		1
	Other		3		10		2		3
Total current regulatory liabilities		$	61	$	73	$	52	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	679	$	651
	Coal contracts (a)		141		180
	Power purchase agreement - OVEC (a)		108		116
	Net deferred tax assets		34		39
	Act 129 compliance rider		8		7	$	8	$	7
	Defined benefit plans		17		9
	Interest rate swaps		14
	Other		9		8
Total noncurrent regulatory liabilities		$	1,010	$	1,010	$	8	$	7

LG And E And KU Energy LLC [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

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

		PPL				PPL Electric
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6
	Fuel adjustment clause		6		3
	Other		2
Total current regulatory assets		$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	730	$	615	$	362	$	276
	Taxes recoverable through future rates		293		289		293		289
	Storm costs		168		154		59		31
	Unamortized loss on debt		96		110		65		77
	Interest rate swaps		67		69
	Accumulated cost of removal of utility plant		71		53		71		53
	Coal contracts (a)		4		11
	AROs		26		18
	Other		28		30		3		3
Total noncurrent regulatory assets		$	1,483	$	1,349	$	853	$	729

		LKE				LG&E				KU
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6	$	11	$	6
	Fuel adjustment clause		6		3		6		3
	Other		2				2
Total current regulatory assets		$	19	$	9	$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	368	$	339	$	232	$	225	$	136	$	114
	Storm costs		109		123		59		66		50		57
	Unamortized loss on debt		31		33		20		21		11		12
	Interest rate swaps		67		69		67		69
	Coal contracts (a)		4		11		2		5		2		6
	AROs		26		18		15		11		11		7
	Other		25		27		5		6		20		21
Total noncurrent regulatory assets		$	630	$	620	$	400	$	403	$	230	$	217

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

Regulatory Liabilities

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

Current Regulatory Liabilities:
	Generation supply charge	$	27	$	42	$	27	$	42
	ECR		4		7
	Gas supply clause		4		6
	Transmission service charge		6		2		6		2
	Transmission formula rate				5				5
	Universal Service Rider		17		1		17		1
	Other		3		10		2		3
Total current regulatory liabilities		$	61	$	73	$	52	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	679	$	651
	Coal contracts (a)		141		180
	Power purchase agreement - OVEC (a)		108		116
	Net deferred tax assets		34		39
	Act 129 compliance rider		8		7	$	8	$	7
	Defined benefit plans		17		9
	Interest rate swaps		14
	Other		9		8
Total noncurrent regulatory liabilities		$	1,010	$	1,010	$	8	$	7

Current Regulatory Liabilities:
		ECR	$	4	$	7					$	4	$	7
		Gas supply clause		4		6	$	4	$	6
		Other		1		7				4		1		3
Total current regulatory liabilities			$	9	$	20	$	4	$	10	$	5	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	679	$	651	$	297	$	286	$	382	$	365
	Coal contracts (a)			141		180		61		78		80		102
	Power purchase agreement - OVEC (a)			108		116		75		80		33		36
	Net deferred tax assets			34		39		28		31		6		8
	Defined benefit plans			17		9						17		9
	Interest rate swaps			14				7				7
	Other			9		8		3		3		6		5
Total noncurrent regulatory liabilities			$	1,002	$	1,003	$	471	$	478	$	531	$	525

(a)       These regulatory assets and liabilities were recorded as offsets to certain intangible assets and liabilities 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 tables provide information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6
	Fuel adjustment clause		6		3
	Other		2
Total current regulatory assets		$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	730	$	615	$	362	$	276
	Taxes recoverable through future rates		293		289		293		289
	Storm costs		168		154		59		31
	Unamortized loss on debt		96		110		65		77
	Interest rate swaps		67		69
	Accumulated cost of removal of utility plant		71		53		71		53
	Coal contracts (a)		4		11
	AROs		26		18
	Other		28		30		3		3
Total noncurrent regulatory assets		$	1,483	$	1,349	$	853	$	729

		LKE				LG&E				KU
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6	$	11	$	6
	Fuel adjustment clause		6		3		6		3
	Other		2				2
Total current regulatory assets		$	19	$	9	$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	368	$	339	$	232	$	225	$	136	$	114
	Storm costs		109		123		59		66		50		57
	Unamortized loss on debt		31		33		20		21		11		12
	Interest rate swaps		67		69		67		69
	Coal contracts (a)		4		11		2		5		2		6
	AROs		26		18		15		11		11		7
	Other		25		27		5		6		20		21
Total noncurrent regulatory assets		$	630	$	620	$	400	$	403	$	230	$	217

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

Regulatory Liabilities

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

Current Regulatory Liabilities:
	Generation supply charge	$	27	$	42	$	27	$	42
	ECR		4		7
	Gas supply clause		4		6
	Transmission service charge		6		2		6		2
	Transmission formula rate				5				5
	Universal Service Rider		17		1		17		1
	Other		3		10		2		3
Total current regulatory liabilities		$	61	$	73	$	52	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	679	$	651
	Coal contracts (a)		141		180
	Power purchase agreement - OVEC (a)		108		116
	Net deferred tax assets		34		39
	Act 129 compliance rider		8		7	$	8	$	7
	Defined benefit plans		17		9
	Interest rate swaps		14
	Other		9		8
Total noncurrent regulatory liabilities		$	1,010	$	1,010	$	8	$	7

Current Regulatory Liabilities:
		ECR	$	4	$	7					$	4	$	7
		Gas supply clause		4		6	$	4	$	6
		Other		1		7				4		1		3
Total current regulatory liabilities			$	9	$	20	$	4	$	10	$	5	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	679	$	651	$	297	$	286	$	382	$	365
	Coal contracts (a)			141		180		61		78		80		102
	Power purchase agreement - OVEC (a)			108		116		75		80		33		36
	Net deferred tax assets			34		39		28		31		6		8
	Defined benefit plans			17		9						17		9
	Interest rate swaps			14				7				7
	Other			9		8		3		3		6		5
Total noncurrent regulatory liabilities			$	1,002	$	1,003	$	471	$	478	$	531	$	525

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

Kentucky Utilities Co [Member]

Utility Rate Regulation [Line Items]

Regulatory Assets

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

		PPL				PPL Electric
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6
	Fuel adjustment clause		6		3
	Other		2
Total current regulatory assets		$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	730	$	615	$	362	$	276
	Taxes recoverable through future rates		293		289		293		289
	Storm costs		168		154		59		31
	Unamortized loss on debt		96		110		65		77
	Interest rate swaps		67		69
	Accumulated cost of removal of utility plant		71		53		71		53
	Coal contracts (a)		4		11
	AROs		26		18
	Other		28		30		3		3
Total noncurrent regulatory assets		$	1,483	$	1,349	$	853	$	729

		LKE				LG&E				KU
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	11	$	6	$	11	$	6
	Fuel adjustment clause		6		3		6		3
	Other		2				2
Total current regulatory assets		$	19	$	9	$	19	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	368	$	339	$	232	$	225	$	136	$	114
	Storm costs		109		123		59		66		50		57
	Unamortized loss on debt		31		33		20		21		11		12
	Interest rate swaps		67		69		67		69
	Coal contracts (a)		4		11		2		5		2		6
	AROs		26		18		15		11		11		7
	Other		25		27		5		6		20		21
Total noncurrent regulatory assets		$	630	$	620	$	400	$	403	$	230	$	217

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

Regulatory Liabilities

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

Current Regulatory Liabilities:
	Generation supply charge	$	27	$	42	$	27	$	42
	ECR		4		7
	Gas supply clause		4		6
	Transmission service charge		6		2		6		2
	Transmission formula rate				5				5
	Universal Service Rider		17		1		17		1
	Other		3		10		2		3
Total current regulatory liabilities		$	61	$	73	$	52	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	679	$	651
	Coal contracts (a)		141		180
	Power purchase agreement - OVEC (a)		108		116
	Net deferred tax assets		34		39
	Act 129 compliance rider		8		7	$	8	$	7
	Defined benefit plans		17		9
	Interest rate swaps		14
	Other		9		8
Total noncurrent regulatory liabilities		$	1,010	$	1,010	$	8	$	7

Current Regulatory Liabilities:
		ECR	$	4	$	7					$	4	$	7
		Gas supply clause		4		6	$	4	$	6
		Other		1		7				4		1		3
Total current regulatory liabilities			$	9	$	20	$	4	$	10	$	5	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	679	$	651	$	297	$	286	$	382	$	365
	Coal contracts (a)			141		180		61		78		80		102
	Power purchase agreement - OVEC (a)			108		116		75		80		33		36
	Net deferred tax assets			34		39		28		31		6		8
	Defined benefit plans			17		9						17		9
	Interest rate swaps			14				7				7
	Other			9		8		3		3		6		5
Total noncurrent regulatory liabilities			$	1,002	$	1,003	$	471	$	478	$	531	$	525

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