Utility Rate Regulation (Tables)

6 Months Ended

Jun. 30, 2012

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
		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6
	Fuel adjustment clause		10		3
Total current regulatory assets		$	17	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	595	$	615	$	270	$	276
	Taxes recoverable through future rates		297		289		297		289
	Storm costs		148		154		32		31
	Unamortized loss on debt		103		110		71		77
	Interest rate swaps		71		69
	Accumulated cost of removal of utility plant		62		53		62		53
	Coal contracts (a)		7		11
	AROs		23		18
	Other		29		30		2		3
Total noncurrent regulatory assets		$	1,335	$	1,349	$	734	$	729

		LKE				LG&E				KU
		June 30,		December 31,		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6	$	7	$	6
	Fuel adjustment clause		10		3		6		3	$	4
Total current regulatory assets		$	17	$	9	$	13	$	9	$	4
Noncurrent Regulatory Assets:
	Defined benefit plans	$	325	$	339	$	215	$	225	$	110	$	114
	Storm costs		116		123		63		66		53		57
	Unamortized loss on debt		32		33		21		21		11		12
	Interest rate swaps		71		69		71		69
	Coal contracts (a)		7		11		3		5		4		6
	AROs		23		18		12		11		11		7
	Other		27		27		6		6		21		21
Total noncurrent regulatory assets		$	601	$	620	$	391	$	403	$	210	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	21	$	42	$	21	$	42
	ECR		9		7
	Gas supply clause		5		6
	Transmission service charge		4		2		4		2
	Transmission formula rate		7				7
	Universal service rider		7				7
	Other		5		16		3		9
Total current regulatory liabilities		$	58	$	73	$	42	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	666	$	651
	Coal contracts (a)		161		180
	Power purchase agreement - OVEC (a)		112		116
	Net deferred tax assets		37		39
	Act 129 compliance rider		9		7	$	9	$	7
	Defined benefit plans		10		9
	Other		8		8
Total noncurrent regulatory liabilities		$	1,003	$	1,010	$	9	$	7

Current Regulatory Liabilities:
		ECR	$	9	$	7					$	9	$	7
		Gas supply clause		5		6	$	5	$	6
		Other		2		7		2		4				3
Total current regulatory liabilities			$	16	$	20	$	7	$	10	$	9	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	666	$	651	$	291	$	286	$	375	$	365
	Coal contracts (a)			161		180		70		78		91		102
	Power purchase agreement - OVEC (a)			112		116		78		80		34		36
	Net deferred tax assets			37		39		30		31		7		8
	Defined benefit plans			10		9						10		9
	Other			8		8		3		3		5		5
Total noncurrent regulatory liabilities			$	994	$	1,003	$	472	$	478	$	522	$	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.

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
		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6
	Fuel adjustment clause		10		3
Total current regulatory assets		$	17	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	595	$	615	$	270	$	276
	Taxes recoverable through future rates		297		289		297		289
	Storm costs		148		154		32		31
	Unamortized loss on debt		103		110		71		77
	Interest rate swaps		71		69
	Accumulated cost of removal of utility plant		62		53		62		53
	Coal contracts (a)		7		11
	AROs		23		18
	Other		29		30		2		3
Total noncurrent regulatory assets		$	1,335	$	1,349	$	734	$	729

		LKE				LG&E				KU
		June 30,		December 31,		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6	$	7	$	6
	Fuel adjustment clause		10		3		6		3	$	4
Total current regulatory assets		$	17	$	9	$	13	$	9	$	4
Noncurrent Regulatory Assets:
	Defined benefit plans	$	325	$	339	$	215	$	225	$	110	$	114
	Storm costs		116		123		63		66		53		57
	Unamortized loss on debt		32		33		21		21		11		12
	Interest rate swaps		71		69		71		69
	Coal contracts (a)		7		11		3		5		4		6
	AROs		23		18		12		11		11		7
	Other		27		27		6		6		21		21
Total noncurrent regulatory assets		$	601	$	620	$	391	$	403	$	210	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	21	$	42	$	21	$	42
	ECR		9		7
	Gas supply clause		5		6
	Transmission service charge		4		2		4		2
	Transmission formula rate		7				7
	Universal service rider		7				7
	Other		5		16		3		9
Total current regulatory liabilities		$	58	$	73	$	42	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	666	$	651
	Coal contracts (a)		161		180
	Power purchase agreement - OVEC (a)		112		116
	Net deferred tax assets		37		39
	Act 129 compliance rider		9		7	$	9	$	7
	Defined benefit plans		10		9
	Other		8		8
Total noncurrent regulatory liabilities		$	1,003	$	1,010	$	9	$	7

Current Regulatory Liabilities:
		ECR	$	9	$	7					$	9	$	7
		Gas supply clause		5		6	$	5	$	6
		Other		2		7		2		4				3
Total current regulatory liabilities			$	16	$	20	$	7	$	10	$	9	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	666	$	651	$	291	$	286	$	375	$	365
	Coal contracts (a)			161		180		70		78		91		102
	Power purchase agreement - OVEC (a)			112		116		78		80		34		36
	Net deferred tax assets			37		39		30		31		7		8
	Defined benefit plans			10		9						10		9
	Other			8		8		3		3		5		5
Total noncurrent regulatory liabilities			$	994	$	1,003	$	472	$	478	$	522	$	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.

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
		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6
	Fuel adjustment clause		10		3
Total current regulatory assets		$	17	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	595	$	615	$	270	$	276
	Taxes recoverable through future rates		297		289		297		289
	Storm costs		148		154		32		31
	Unamortized loss on debt		103		110		71		77
	Interest rate swaps		71		69
	Accumulated cost of removal of utility plant		62		53		62		53
	Coal contracts (a)		7		11
	AROs		23		18
	Other		29		30		2		3
Total noncurrent regulatory assets		$	1,335	$	1,349	$	734	$	729

		LKE				LG&E				KU
		June 30,		December 31,		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6	$	7	$	6
	Fuel adjustment clause		10		3		6		3	$	4
Total current regulatory assets		$	17	$	9	$	13	$	9	$	4
Noncurrent Regulatory Assets:
	Defined benefit plans	$	325	$	339	$	215	$	225	$	110	$	114
	Storm costs		116		123		63		66		53		57
	Unamortized loss on debt		32		33		21		21		11		12
	Interest rate swaps		71		69		71		69
	Coal contracts (a)		7		11		3		5		4		6
	AROs		23		18		12		11		11		7
	Other		27		27		6		6		21		21
Total noncurrent regulatory assets		$	601	$	620	$	391	$	403	$	210	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	21	$	42	$	21	$	42
	ECR		9		7
	Gas supply clause		5		6
	Transmission service charge		4		2		4		2
	Transmission formula rate		7				7
	Universal service rider		7				7
	Other		5		16		3		9
Total current regulatory liabilities		$	58	$	73	$	42	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	666	$	651
	Coal contracts (a)		161		180
	Power purchase agreement - OVEC (a)		112		116
	Net deferred tax assets		37		39
	Act 129 compliance rider		9		7	$	9	$	7
	Defined benefit plans		10		9
	Other		8		8
Total noncurrent regulatory liabilities		$	1,003	$	1,010	$	9	$	7

Current Regulatory Liabilities:
		ECR	$	9	$	7					$	9	$	7
		Gas supply clause		5		6	$	5	$	6
		Other		2		7		2		4				3
Total current regulatory liabilities			$	16	$	20	$	7	$	10	$	9	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	666	$	651	$	291	$	286	$	375	$	365
	Coal contracts (a)			161		180		70		78		91		102
	Power purchase agreement - OVEC (a)			112		116		78		80		34		36
	Net deferred tax assets			37		39		30		31		7		8
	Defined benefit plans			10		9						10		9
	Other			8		8		3		3		5		5
Total noncurrent regulatory liabilities			$	994	$	1,003	$	472	$	478	$	522	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6
	Fuel adjustment clause		10		3
Total current regulatory assets		$	17	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	595	$	615	$	270	$	276
	Taxes recoverable through future rates		297		289		297		289
	Storm costs		148		154		32		31
	Unamortized loss on debt		103		110		71		77
	Interest rate swaps		71		69
	Accumulated cost of removal of utility plant		62		53		62		53
	Coal contracts (a)		7		11
	AROs		23		18
	Other		29		30		2		3
Total noncurrent regulatory assets		$	1,335	$	1,349	$	734	$	729

		LKE				LG&E				KU
		June 30,		December 31,		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6	$	7	$	6
	Fuel adjustment clause		10		3		6		3	$	4
Total current regulatory assets		$	17	$	9	$	13	$	9	$	4
Noncurrent Regulatory Assets:
	Defined benefit plans	$	325	$	339	$	215	$	225	$	110	$	114
	Storm costs		116		123		63		66		53		57
	Unamortized loss on debt		32		33		21		21		11		12
	Interest rate swaps		71		69		71		69
	Coal contracts (a)		7		11		3		5		4		6
	AROs		23		18		12		11		11		7
	Other		27		27		6		6		21		21
Total noncurrent regulatory assets		$	601	$	620	$	391	$	403	$	210	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	21	$	42	$	21	$	42
	ECR		9		7
	Gas supply clause		5		6
	Transmission service charge		4		2		4		2
	Transmission formula rate		7				7
	Universal service rider		7				7
	Other		5		16		3		9
Total current regulatory liabilities		$	58	$	73	$	42	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	666	$	651
	Coal contracts (a)		161		180
	Power purchase agreement - OVEC (a)		112		116
	Net deferred tax assets		37		39
	Act 129 compliance rider		9		7	$	9	$	7
	Defined benefit plans		10		9
	Other		8		8
Total noncurrent regulatory liabilities		$	1,003	$	1,010	$	9	$	7

Current Regulatory Liabilities:
		ECR	$	9	$	7					$	9	$	7
		Gas supply clause		5		6	$	5	$	6
		Other		2		7		2		4				3
Total current regulatory liabilities			$	16	$	20	$	7	$	10	$	9	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	666	$	651	$	291	$	286	$	375	$	365
	Coal contracts (a)			161		180		70		78		91		102
	Power purchase agreement - OVEC (a)			112		116		78		80		34		36
	Net deferred tax assets			37		39		30		31		7		8
	Defined benefit plans			10		9						10		9
	Other			8		8		3		3		5		5
Total noncurrent regulatory liabilities			$	994	$	1,003	$	472	$	478	$	522	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

		PPL				PPL Electric
		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6
	Fuel adjustment clause		10		3
Total current regulatory assets		$	17	$	9
Noncurrent Regulatory Assets:
	Defined benefit plans	$	595	$	615	$	270	$	276
	Taxes recoverable through future rates		297		289		297		289
	Storm costs		148		154		32		31
	Unamortized loss on debt		103		110		71		77
	Interest rate swaps		71		69
	Accumulated cost of removal of utility plant		62		53		62		53
	Coal contracts (a)		7		11
	AROs		23		18
	Other		29		30		2		3
Total noncurrent regulatory assets		$	1,335	$	1,349	$	734	$	729

		LKE				LG&E				KU
		June 30,		December 31,		June 30,		December 31,		June 30,		December 31,
		2012		2011		2012		2011		2012		2011
Current Regulatory Assets:
	Gas supply clause	$	7	$	6	$	7	$	6
	Fuel adjustment clause		10		3		6		3	$	4
Total current regulatory assets		$	17	$	9	$	13	$	9	$	4
Noncurrent Regulatory Assets:
	Defined benefit plans	$	325	$	339	$	215	$	225	$	110	$	114
	Storm costs		116		123		63		66		53		57
	Unamortized loss on debt		32		33		21		21		11		12
	Interest rate swaps		71		69		71		69
	Coal contracts (a)		7		11		3		5		4		6
	AROs		23		18		12		11		11		7
	Other		27		27		6		6		21		21
Total noncurrent regulatory assets		$	601	$	620	$	391	$	403	$	210	$	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 table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations.

Current Regulatory Liabilities:
	Generation supply charge	$	21	$	42	$	21	$	42
	ECR		9		7
	Gas supply clause		5		6
	Transmission service charge		4		2		4		2
	Transmission formula rate		7				7
	Universal service rider		7				7
	Other		5		16		3		9
Total current regulatory liabilities		$	58	$	73	$	42	$	53
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	666	$	651
	Coal contracts (a)		161		180
	Power purchase agreement - OVEC (a)		112		116
	Net deferred tax assets		37		39
	Act 129 compliance rider		9		7	$	9	$	7
	Defined benefit plans		10		9
	Other		8		8
Total noncurrent regulatory liabilities		$	1,003	$	1,010	$	9	$	7

Current Regulatory Liabilities:
		ECR	$	9	$	7					$	9	$	7
		Gas supply clause		5		6	$	5	$	6
		Other		2		7		2		4				3
Total current regulatory liabilities			$	16	$	20	$	7	$	10	$	9	$	10
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	666	$	651	$	291	$	286	$	375	$	365
	Coal contracts (a)			161		180		70		78		91		102
	Power purchase agreement - OVEC (a)			112		116		78		80		34		36
	Net deferred tax assets			37		39		30		31		7		8
	Defined benefit plans			10		9						10		9
	Other			8		8		3		3		5		5
Total noncurrent regulatory liabilities			$	994	$	1,003	$	472	$	478	$	522	$	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.