Utility Rate Regulation (Tables)

12 Months Ended

Dec. 31, 2014

Regulated Operations [Line Items]

Regulatory Assets and Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations at December 31.

		PPL				PPL Electric
		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7
	Gas supply clause		15		10
	Fuel adjustment clause		4		2
	Demand side management				8
	Transmission service charge		6			$	6
	Other		7		6		6	$	6
Total current regulatory assets		$	37	$	33	$	12	$	6
Noncurrent Regulatory Assets:
	Defined benefit plans	$	720	$	509	$	372	$	257
	Taxes recoverable through future rates		316		306		316		306
	Storm costs		124		147		46		53
	Unamortized loss on debt		77		85		49		57
	Interest rate swaps		122		44
	Accumulated cost of removal of utility plant		114		98		114		98
	AROs		79		44
	Other		10		13				1
Total noncurrent regulatory assets		$	1,562	$	1,246	$	897	$	772

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	23	$	28	$	23
	Gas supply clause		6		3
	Transmission service charge				8				8
	Transmission formula rate		42		20		42		20
	Fuel adjustment clause				4
	Universal service rider				10				10
	Storm damage expense		3		14		3		14
	Gas line tracker		3		6
	Other		9		2		3		1
Total current regulatory liabilities		$	91	$	90	$	76	$	76
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	693	$	688
	Coal contracts (a)		59		98
	Power purchase agreement - OVEC (a)		92		100
	Net deferred tax assets		26		30
	Act 129 compliance rider		18		15	$	18	$	15
	Defined benefit plans		16		26
	Interest rate swaps		84		86
	Other		4		5
Total noncurrent regulatory liabilities		$	992	$	1,048	$	18	$	15

		LKE				LG&E				KU
		2014		2013		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7	$	4	$	2	$	1	$	5
	Gas supply clause		15		10		15		10
	Fuel adjustment clause		4		2		2		2		2
	Demand side management				8				3				5
	Other		1								1
Total current regulatory assets		$	25	$	27	$	21	$	17	$	4	$	10
Noncurrent Regulatory Assets:
	Defined benefit plans	$	348	$	252	$	215	$	164	$	133	$	88
	Storm costs		78		94		43		51		35		43
	Unamortized loss on debt		28		28		18		18		10		10
	Interest rate swaps		122		44		89		44		33
	AROs		79		44		28		21		51		23
	Other		10		12		4		5		6		7
Total noncurrent regulatory assets		$	665	$	474	$	397	$	303	$	268	$	171

Current Regulatory Liabilities:
		Demand side management	$	2			$	1			$	1
		Gas supply clause		6	$	3		6	$	3
		Fuel adjustment clause				4							$	4
		Gas line tracker		3		6		3		6
		Other		4		1						4		1
Total current regulatory liabilities			$	15	$	14	$	10	$	9	$	5	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	693	$	688	$	302	$	299	$	391	$	389
	Coal contracts (a)			59		98		25		43		34		55
	Power purchase agreement - OVEC (a)			92		100		63		69		29		31
	Net deferred tax assets			26		30		24		26		2		4
	Defined benefit plans			16		26						16		26
	Interest rate swaps			84		86		42		43		42		43
	Other			4		5		2		2		2		3
Total noncurrent regulatory liabilities			$	974	$	1,033	$	458	$	482	$	516	$	551

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

PPL Electric Utilities Corp [Member]

Regulated Operations [Line Items]

Regulatory Assets and Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations at December 31.

		PPL				PPL Electric
		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7
	Gas supply clause		15		10
	Fuel adjustment clause		4		2
	Demand side management				8
	Transmission service charge		6			$	6
	Other		7		6		6	$	6
Total current regulatory assets		$	37	$	33	$	12	$	6
Noncurrent Regulatory Assets:
	Defined benefit plans	$	720	$	509	$	372	$	257
	Taxes recoverable through future rates		316		306		316		306
	Storm costs		124		147		46		53
	Unamortized loss on debt		77		85		49		57
	Interest rate swaps		122		44
	Accumulated cost of removal of utility plant		114		98		114		98
	AROs		79		44
	Other		10		13				1
Total noncurrent regulatory assets		$	1,562	$	1,246	$	897	$	772

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	23	$	28	$	23
	Gas supply clause		6		3
	Transmission service charge				8				8
	Transmission formula rate		42		20		42		20
	Fuel adjustment clause				4
	Universal service rider				10				10
	Storm damage expense		3		14		3		14
	Gas line tracker		3		6
	Other		9		2		3		1
Total current regulatory liabilities		$	91	$	90	$	76	$	76
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	693	$	688
	Coal contracts (a)		59		98
	Power purchase agreement - OVEC (a)		92		100
	Net deferred tax assets		26		30
	Act 129 compliance rider		18		15	$	18	$	15
	Defined benefit plans		16		26
	Interest rate swaps		84		86
	Other		4		5
Total noncurrent regulatory liabilities		$	992	$	1,048	$	18	$	15

		LKE				LG&E				KU
		2014		2013		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7	$	4	$	2	$	1	$	5
	Gas supply clause		15		10		15		10
	Fuel adjustment clause		4		2		2		2		2
	Demand side management				8				3				5
	Other		1								1
Total current regulatory assets		$	25	$	27	$	21	$	17	$	4	$	10
Noncurrent Regulatory Assets:
	Defined benefit plans	$	348	$	252	$	215	$	164	$	133	$	88
	Storm costs		78		94		43		51		35		43
	Unamortized loss on debt		28		28		18		18		10		10
	Interest rate swaps		122		44		89		44		33
	AROs		79		44		28		21		51		23
	Other		10		12		4		5		6		7
Total noncurrent regulatory assets		$	665	$	474	$	397	$	303	$	268	$	171

Current Regulatory Liabilities:
		Demand side management	$	2			$	1			$	1
		Gas supply clause		6	$	3		6	$	3
		Fuel adjustment clause				4							$	4
		Gas line tracker		3		6		3		6
		Other		4		1						4		1
Total current regulatory liabilities			$	15	$	14	$	10	$	9	$	5	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	693	$	688	$	302	$	299	$	391	$	389
	Coal contracts (a)			59		98		25		43		34		55
	Power purchase agreement - OVEC (a)			92		100		63		69		29		31
	Net deferred tax assets			26		30		24		26		2		4
	Defined benefit plans			16		26						16		26
	Interest rate swaps			84		86		42		43		42		43
	Other			4		5		2		2		2		3
Total noncurrent regulatory liabilities			$	974	$	1,033	$	458	$	482	$	516	$	551

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

LG And E And KU Energy LLC [Member]

Regulated Operations [Line Items]

Regulatory Assets and Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations at December 31.

		PPL				PPL Electric
		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7
	Gas supply clause		15		10
	Fuel adjustment clause		4		2
	Demand side management				8
	Transmission service charge		6			$	6
	Other		7		6		6	$	6
Total current regulatory assets		$	37	$	33	$	12	$	6
Noncurrent Regulatory Assets:
	Defined benefit plans	$	720	$	509	$	372	$	257
	Taxes recoverable through future rates		316		306		316		306
	Storm costs		124		147		46		53
	Unamortized loss on debt		77		85		49		57
	Interest rate swaps		122		44
	Accumulated cost of removal of utility plant		114		98		114		98
	AROs		79		44
	Other		10		13				1
Total noncurrent regulatory assets		$	1,562	$	1,246	$	897	$	772

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	23	$	28	$	23
	Gas supply clause		6		3
	Transmission service charge				8				8
	Transmission formula rate		42		20		42		20
	Fuel adjustment clause				4
	Universal service rider				10				10
	Storm damage expense		3		14		3		14
	Gas line tracker		3		6
	Other		9		2		3		1
Total current regulatory liabilities		$	91	$	90	$	76	$	76
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	693	$	688
	Coal contracts (a)		59		98
	Power purchase agreement - OVEC (a)		92		100
	Net deferred tax assets		26		30
	Act 129 compliance rider		18		15	$	18	$	15
	Defined benefit plans		16		26
	Interest rate swaps		84		86
	Other		4		5
Total noncurrent regulatory liabilities		$	992	$	1,048	$	18	$	15

		LKE				LG&E				KU
		2014		2013		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7	$	4	$	2	$	1	$	5
	Gas supply clause		15		10		15		10
	Fuel adjustment clause		4		2		2		2		2
	Demand side management				8				3				5
	Other		1								1
Total current regulatory assets		$	25	$	27	$	21	$	17	$	4	$	10
Noncurrent Regulatory Assets:
	Defined benefit plans	$	348	$	252	$	215	$	164	$	133	$	88
	Storm costs		78		94		43		51		35		43
	Unamortized loss on debt		28		28		18		18		10		10
	Interest rate swaps		122		44		89		44		33
	AROs		79		44		28		21		51		23
	Other		10		12		4		5		6		7
Total noncurrent regulatory assets		$	665	$	474	$	397	$	303	$	268	$	171

Current Regulatory Liabilities:
		Demand side management	$	2			$	1			$	1
		Gas supply clause		6	$	3		6	$	3
		Fuel adjustment clause				4							$	4
		Gas line tracker		3		6		3		6
		Other		4		1						4		1
Total current regulatory liabilities			$	15	$	14	$	10	$	9	$	5	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	693	$	688	$	302	$	299	$	391	$	389
	Coal contracts (a)			59		98		25		43		34		55
	Power purchase agreement - OVEC (a)			92		100		63		69		29		31
	Net deferred tax assets			26		30		24		26		2		4
	Defined benefit plans			16		26						16		26
	Interest rate swaps			84		86		42		43		42		43
	Other			4		5		2		2		2		3
Total noncurrent regulatory liabilities			$	974	$	1,033	$	458	$	482	$	516	$	551

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

Louisville Gas And Electric Co [Member]

Regulated Operations [Line Items]

Regulatory Assets and Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations at December 31.

		PPL				PPL Electric
		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7
	Gas supply clause		15		10
	Fuel adjustment clause		4		2
	Demand side management				8
	Transmission service charge		6			$	6
	Other		7		6		6	$	6
Total current regulatory assets		$	37	$	33	$	12	$	6
Noncurrent Regulatory Assets:
	Defined benefit plans	$	720	$	509	$	372	$	257
	Taxes recoverable through future rates		316		306		316		306
	Storm costs		124		147		46		53
	Unamortized loss on debt		77		85		49		57
	Interest rate swaps		122		44
	Accumulated cost of removal of utility plant		114		98		114		98
	AROs		79		44
	Other		10		13				1
Total noncurrent regulatory assets		$	1,562	$	1,246	$	897	$	772

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	23	$	28	$	23
	Gas supply clause		6		3
	Transmission service charge				8				8
	Transmission formula rate		42		20		42		20
	Fuel adjustment clause				4
	Universal service rider				10				10
	Storm damage expense		3		14		3		14
	Gas line tracker		3		6
	Other		9		2		3		1
Total current regulatory liabilities		$	91	$	90	$	76	$	76
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	693	$	688
	Coal contracts (a)		59		98
	Power purchase agreement - OVEC (a)		92		100
	Net deferred tax assets		26		30
	Act 129 compliance rider		18		15	$	18	$	15
	Defined benefit plans		16		26
	Interest rate swaps		84		86
	Other		4		5
Total noncurrent regulatory liabilities		$	992	$	1,048	$	18	$	15

		LKE				LG&E				KU
		2014		2013		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7	$	4	$	2	$	1	$	5
	Gas supply clause		15		10		15		10
	Fuel adjustment clause		4		2		2		2		2
	Demand side management				8				3				5
	Other		1								1
Total current regulatory assets		$	25	$	27	$	21	$	17	$	4	$	10
Noncurrent Regulatory Assets:
	Defined benefit plans	$	348	$	252	$	215	$	164	$	133	$	88
	Storm costs		78		94		43		51		35		43
	Unamortized loss on debt		28		28		18		18		10		10
	Interest rate swaps		122		44		89		44		33
	AROs		79		44		28		21		51		23
	Other		10		12		4		5		6		7
Total noncurrent regulatory assets		$	665	$	474	$	397	$	303	$	268	$	171

Current Regulatory Liabilities:
		Demand side management	$	2			$	1			$	1
		Gas supply clause		6	$	3		6	$	3
		Fuel adjustment clause				4							$	4
		Gas line tracker		3		6		3		6
		Other		4		1						4		1
Total current regulatory liabilities			$	15	$	14	$	10	$	9	$	5	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	693	$	688	$	302	$	299	$	391	$	389
	Coal contracts (a)			59		98		25		43		34		55
	Power purchase agreement - OVEC (a)			92		100		63		69		29		31
	Net deferred tax assets			26		30		24		26		2		4
	Defined benefit plans			16		26						16		26
	Interest rate swaps			84		86		42		43		42		43
	Other			4		5		2		2		2		3
Total noncurrent regulatory liabilities			$	974	$	1,033	$	458	$	482	$	516	$	551

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

Kentucky Utilities Co [Member]

Regulated Operations [Line Items]

Regulatory Assets and Liabilities

The following table provides information about the regulatory assets and liabilities of cost-based rate-regulated utility operations at December 31.

		PPL				PPL Electric
		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7
	Gas supply clause		15		10
	Fuel adjustment clause		4		2
	Demand side management				8
	Transmission service charge		6			$	6
	Other		7		6		6	$	6
Total current regulatory assets		$	37	$	33	$	12	$	6
Noncurrent Regulatory Assets:
	Defined benefit plans	$	720	$	509	$	372	$	257
	Taxes recoverable through future rates		316		306		316		306
	Storm costs		124		147		46		53
	Unamortized loss on debt		77		85		49		57
	Interest rate swaps		122		44
	Accumulated cost of removal of utility plant		114		98		114		98
	AROs		79		44
	Other		10		13				1
Total noncurrent regulatory assets		$	1,562	$	1,246	$	897	$	772

Current Regulatory Liabilities:
	Generation supply charge	$	28	$	23	$	28	$	23
	Gas supply clause		6		3
	Transmission service charge				8				8
	Transmission formula rate		42		20		42		20
	Fuel adjustment clause				4
	Universal service rider				10				10
	Storm damage expense		3		14		3		14
	Gas line tracker		3		6
	Other		9		2		3		1
Total current regulatory liabilities		$	91	$	90	$	76	$	76
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal of utility plant	$	693	$	688
	Coal contracts (a)		59		98
	Power purchase agreement - OVEC (a)		92		100
	Net deferred tax assets		26		30
	Act 129 compliance rider		18		15	$	18	$	15
	Defined benefit plans		16		26
	Interest rate swaps		84		86
	Other		4		5
Total noncurrent regulatory liabilities		$	992	$	1,048	$	18	$	15

		LKE				LG&E				KU
		2014		2013		2014		2013		2014		2013
Current Regulatory Assets:
	Environmental cost recovery	$	5	$	7	$	4	$	2	$	1	$	5
	Gas supply clause		15		10		15		10
	Fuel adjustment clause		4		2		2		2		2
	Demand side management				8				3				5
	Other		1								1
Total current regulatory assets		$	25	$	27	$	21	$	17	$	4	$	10
Noncurrent Regulatory Assets:
	Defined benefit plans	$	348	$	252	$	215	$	164	$	133	$	88
	Storm costs		78		94		43		51		35		43
	Unamortized loss on debt		28		28		18		18		10		10
	Interest rate swaps		122		44		89		44		33
	AROs		79		44		28		21		51		23
	Other		10		12		4		5		6		7
Total noncurrent regulatory assets		$	665	$	474	$	397	$	303	$	268	$	171

Current Regulatory Liabilities:
		Demand side management	$	2			$	1			$	1
		Gas supply clause		6	$	3		6	$	3
		Fuel adjustment clause				4							$	4
		Gas line tracker		3		6		3		6
		Other		4		1						4		1
Total current regulatory liabilities			$	15	$	14	$	10	$	9	$	5	$	5
Noncurrent Regulatory Liabilities:
	Accumulated cost of removal
		of utility plant	$	693	$	688	$	302	$	299	$	391	$	389
	Coal contracts (a)			59		98		25		43		34		55
	Power purchase agreement - OVEC (a)			92		100		63		69		29		31
	Net deferred tax assets			26		30		24		26		2		4
	Defined benefit plans			16		26						16		26
	Interest rate swaps			84		86		42		43		42		43
	Other			4		5		2		2		2		3
Total noncurrent regulatory liabilities			$	974	$	1,033	$	458	$	482	$	516	$	551

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