Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]

Stock-Based Compensation, Plan Award Limits

The following table details the award limits under each of the Plans.

		Annual Grant Limit		Annual Grant Limit
		Total As % of		For Individual Participants -
	Total Plan	Outstanding	Annual Grant	Performance Based Awards
	Award	PPL Common Stock	Limit	For awards	For awards
	Limit	On First Day of	Options	denominated in	denominated in
Plan	(Shares)	Each Calendar Year	(Shares)	shares (Shares)	cash (in dollars)
ICP (a)	15,769,431	2%	3,000,000
SIP	10,000,000		2,000,000	750,000	$	15,000,000
ICPKE	14,199,796	2%	3,000,000

(a)Applicable to outstanding awards granted from January 27, 2006 to January 26, 2012. During 2012, the total plan award limit was reached and the ICP was replaced by the SIP.

Restricted Stock and Restricted Stock Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of restricted stock and restricted stock units granted was:

	2015		2014		2013
PPL	$	34.50	$	31.50	$	30.30
PPL Electric		34.41		31.81		30.55
LKE		34.89		30.98		30.00

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2015 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,485,520	$	30.07
	Granted	1,028,009		34.50
	Anti-dilution adjustments (a)	247,098		N/A
	Vested	(3,055,205)		29.34
	Forfeited	(25,947)		30.70
Nonvested, end of period (b)		1,679,475		29.65
PPL Electric
Nonvested, beginning of period		286,811	$	30.04
	Transfer between registrants	(22,730)		29.56
	Granted	75,213		34.41
	Anti-dilution adjustments (a)	18,661		N/A
	Vested	(127,507)		29.12
	Forfeited	(9,363)		30.51
Nonvested, end of period		221,085		29.48
LKE
Nonvested, beginning of period		341,468	$	29.76
	Transfer between registrants	4,300		31.74
	Granted	98,360		34.89
	Anti-dilution adjustments (a)	24,587		N/A
	Vested	(149,752)		28.55
Nonvested, end of period		318,963		29.65

(a)Includes adjustment to all restricted stock units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 1,226,193 restricted stock units for which restrictions lapsed for former PPL Energy Supply employees as a result of the spinoff, but for which distribution will not occur until the end of the original restriction period of the awards.

Restricted Stock and Restricted Stock Units, Total Fair Value Vested at Year End

The total fair value of restricted stock and restricted stock units vesting for the years ended December 31 was:

	2015		2014		2013
PPL	$	28	$	11	$	12
PPL Electric		4		2		3
LKE		4				1

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2015	2014	2013
Expected stock volatility	15.90%	15.80%	15.50%
Expected life	3 years	3 years	3 years

Performance Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of performance units granted was:

	2015		2014		2013
PPL	$	36.76	$	34.55	$	34.15
PPL Electric		37.93		34.43		33.97
LKE		37.10		34.12		33.84

Performance Units, Activity Rollforward

Performance unit activity for 2015 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			1,171,716	$	33.77
	Granted		481,197		36.76
	Anti-dilution adjustment (a)		90,251		N/A
	Vested		(509,139)		32.12
	Forfeited		(240,485)		33.35
Nonvested, end of period (b)			993,540		33.09
PPL Electric
Nonvested, beginning of period			59,615	$	33.77
	Transfer between registrants		(3,676)		35.80
	Granted		21,798		37.93
	Anti-dilution adjustment (a)		4,627		N/A
	Vested		(8,497)		31.38
	Forfeited		(6,196)		31.38
Nonvested, end of period			67,671		33.05
LKE
Nonvested, beginning of period			173,946	$	33.32
	Granted		66,439		37.10
	Anti-dilution adjustment (a)		13,207		N/A
	Vested		(30,921)		31.35
	Forfeited		(29,507)		31.36
Nonvested, end of period			193,164		32.96

(a)Includes adjustment to all performance units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 322,429 performance units for which the service vesting requirement was waived for former PPL Energy Supply employees as a result of the spinoff, but for which the ultimate number of shares to be distributed will depend on the actual attainment of the performance goals at the end of the specified performance periods.

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013
Risk-free interest rate		1.15%
Expected option life		6.48 years
Expected stock volatility		18.50%
Dividend yield		5.00%

Stock Options, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of options granted was:

	2013
PPL	$	2.18
PPL Electric		2.19
LKE		2.18

Stock Options, Activity Rollforward

Stock option activity for 2015 was:

						Weighted-
				Weighted		Average
				Average		Remaining		Aggregate
		Number		Exercise		Contractual		Total Intrinsic
		of Options		Price Per Share		Term (years)		Value
PPL
Outstanding at beginning of period			9,042,962	$	30.93
	Anti-dilution adjustment (a)		907,737		28.06
	Exercised		(3,559,874)		27.35
	Forfeited		(5,676)		26.67
Outstanding at end of period			6,385,149		28.54		5.2	$	42
Options exercisable at end of period			5,683,535		28.78		5.0		36
PPL Electric
Outstanding at beginning of period			507,920	$	30.04
	Transfer between registrants		(15,339)		29.60
	Anti-dilution adjustment (a)		44,859		28.06
	Exercised		(224,007)		27.20
Outstanding at end of period			313,433		27.79		5.2	$	2
Options exercisable at end of period			263,443		28.02		4.8		2
LKE
Outstanding at beginning of period			623,317	$	28.64
	Anti-dilution adjustment (a)		43,236		28.06
	Exercised		(240,897)		28.04
Outstanding at end of period			425,656		26.08		6.7	$	3
Options exercisable at end of period			277,101		25.80		6.5		2

(a)Adjustments to prior year grants under the anti-dilution provisions of PPL’s stock-based compensation Plans as a result of the spinoff of PPL Energy Supply.

Compensation Costs for Restricted Stock, Restricted Stock Units, Performance Units and Stock Options

Compensation expense for restricted stock, restricted stock units, performance units and stock options accounted for as equity awards, which for PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2015		2014		2013
PPL	$	33	$	30	$	25
PPL Electric		14		12		10
LKE		8		8		8

The income tax benefit related to above compensation expense was as follows:

	2015		2014		2013
PPL	$	14	$	12	$	11
PPL Electric		6		5		4
LKE		3		3		3

Unrecognized Compensation Cost, Nonvested Restricted Stock, Restricted Stock Units, Performance Units and Stock Option Awards

At December 31, 2015, unrecognized compensation expense related to nonvestedrestricted stock, restricted stock units, performance units and stock option awards was:

			Weighted-
	Unrecognized		Average
	Compensation		Period for
	Expense		Recognition
PPL	$	8		1.6 years
PPL Electric		2		1.6 years
LKE		1		1.4 years

PPL Electric Utilities Corp [Member]

Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]

Stock-Based Compensation, Plan Award Limits

The following table details the award limits under each of the Plans.

		Annual Grant Limit		Annual Grant Limit
		Total As % of		For Individual Participants -
	Total Plan	Outstanding	Annual Grant	Performance Based Awards
	Award	PPL Common Stock	Limit	For awards	For awards
	Limit	On First Day of	Options	denominated in	denominated in
Plan	(Shares)	Each Calendar Year	(Shares)	shares (Shares)	cash (in dollars)
ICP (a)	15,769,431	2%	3,000,000
SIP	10,000,000		2,000,000	750,000	$	15,000,000
ICPKE	14,199,796	2%	3,000,000

(a)Applicable to outstanding awards granted from January 27, 2006 to January 26, 2012. During 2012, the total plan award limit was reached and the ICP was replaced by the SIP.

Restricted Stock and Restricted Stock Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of restricted stock and restricted stock units granted was:

	2015		2014		2013
PPL	$	34.50	$	31.50	$	30.30
PPL Electric		34.41		31.81		30.55
LKE		34.89		30.98		30.00

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2015 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,485,520	$	30.07
	Granted	1,028,009		34.50
	Anti-dilution adjustments (a)	247,098		N/A
	Vested	(3,055,205)		29.34
	Forfeited	(25,947)		30.70
Nonvested, end of period (b)		1,679,475		29.65
PPL Electric
Nonvested, beginning of period		286,811	$	30.04
	Transfer between registrants	(22,730)		29.56
	Granted	75,213		34.41
	Anti-dilution adjustments (a)	18,661		N/A
	Vested	(127,507)		29.12
	Forfeited	(9,363)		30.51
Nonvested, end of period		221,085		29.48
LKE
Nonvested, beginning of period		341,468	$	29.76
	Transfer between registrants	4,300		31.74
	Granted	98,360		34.89
	Anti-dilution adjustments (a)	24,587		N/A
	Vested	(149,752)		28.55
Nonvested, end of period		318,963		29.65

(a)Includes adjustment to all restricted stock units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 1,226,193 restricted stock units for which restrictions lapsed for former PPL Energy Supply employees as a result of the spinoff, but for which distribution will not occur until the end of the original restriction period of the awards.

Restricted Stock and Restricted Stock Units, Total Fair Value Vested at Year End

The total fair value of restricted stock and restricted stock units vesting for the years ended December 31 was:

	2015		2014		2013
PPL	$	28	$	11	$	12
PPL Electric		4		2		3
LKE		4				1

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2015	2014	2013
Expected stock volatility	15.90%	15.80%	15.50%
Expected life	3 years	3 years	3 years

Performance Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of performance units granted was:

	2015		2014		2013
PPL	$	36.76	$	34.55	$	34.15
PPL Electric		37.93		34.43		33.97
LKE		37.10		34.12		33.84

Performance Units, Activity Rollforward

Performance unit activity for 2015 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			1,171,716	$	33.77
	Granted		481,197		36.76
	Anti-dilution adjustment (a)		90,251		N/A
	Vested		(509,139)		32.12
	Forfeited		(240,485)		33.35
Nonvested, end of period (b)			993,540		33.09
PPL Electric
Nonvested, beginning of period			59,615	$	33.77
	Transfer between registrants		(3,676)		35.80
	Granted		21,798		37.93
	Anti-dilution adjustment (a)		4,627		N/A
	Vested		(8,497)		31.38
	Forfeited		(6,196)		31.38
Nonvested, end of period			67,671		33.05
LKE
Nonvested, beginning of period			173,946	$	33.32
	Granted		66,439		37.10
	Anti-dilution adjustment (a)		13,207		N/A
	Vested		(30,921)		31.35
	Forfeited		(29,507)		31.36
Nonvested, end of period			193,164		32.96

(a)Includes adjustment to all performance units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 322,429 performance units for which the service vesting requirement was waived for former PPL Energy Supply employees as a result of the spinoff, but for which the ultimate number of shares to be distributed will depend on the actual attainment of the performance goals at the end of the specified performance periods.

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013
Risk-free interest rate		1.15%
Expected option life		6.48 years
Expected stock volatility		18.50%
Dividend yield		5.00%

Stock Options, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of options granted was:

	2013
PPL	$	2.18
PPL Electric		2.19
LKE		2.18

Stock Options, Activity Rollforward

Stock option activity for 2015 was:

						Weighted-
				Weighted		Average
				Average		Remaining		Aggregate
		Number		Exercise		Contractual		Total Intrinsic
		of Options		Price Per Share		Term (years)		Value
PPL
Outstanding at beginning of period			9,042,962	$	30.93
	Anti-dilution adjustment (a)		907,737		28.06
	Exercised		(3,559,874)		27.35
	Forfeited		(5,676)		26.67
Outstanding at end of period			6,385,149		28.54		5.2	$	42
Options exercisable at end of period			5,683,535		28.78		5.0		36
PPL Electric
Outstanding at beginning of period			507,920	$	30.04
	Transfer between registrants		(15,339)		29.60
	Anti-dilution adjustment (a)		44,859		28.06
	Exercised		(224,007)		27.20
Outstanding at end of period			313,433		27.79		5.2	$	2
Options exercisable at end of period			263,443		28.02		4.8		2
LKE
Outstanding at beginning of period			623,317	$	28.64
	Anti-dilution adjustment (a)		43,236		28.06
	Exercised		(240,897)		28.04
Outstanding at end of period			425,656		26.08		6.7	$	3
Options exercisable at end of period			277,101		25.80		6.5		2

(a)Adjustments to prior year grants under the anti-dilution provisions of PPL’s stock-based compensation Plans as a result of the spinoff of PPL Energy Supply.

Compensation Costs for Restricted Stock, Restricted Stock Units, Performance Units and Stock Options

Compensation expense for restricted stock, restricted stock units, performance units and stock options accounted for as equity awards, which for PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2015		2014		2013
PPL	$	33	$	30	$	25
PPL Electric		14		12		10
LKE		8		8		8

The income tax benefit related to above compensation expense was as follows:

	2015		2014		2013
PPL	$	14	$	12	$	11
PPL Electric		6		5		4
LKE		3		3		3

Unrecognized Compensation Cost, Nonvested Restricted Stock, Restricted Stock Units, Performance Units and Stock Option Awards

At December 31, 2015, unrecognized compensation expense related to nonvestedrestricted stock, restricted stock units, performance units and stock option awards was:

			Weighted-
	Unrecognized		Average
	Compensation		Period for
	Expense		Recognition
PPL	$	8		1.6 years
PPL Electric		2		1.6 years
LKE		1		1.4 years

LG And E And KU Energy LLC [Member]

Disclosure Of Compensation Related Costs Sharebased Payments [Line Items]

Stock-Based Compensation, Plan Award Limits

The following table details the award limits under each of the Plans.

		Annual Grant Limit		Annual Grant Limit
		Total As % of		For Individual Participants -
	Total Plan	Outstanding	Annual Grant	Performance Based Awards
	Award	PPL Common Stock	Limit	For awards	For awards
	Limit	On First Day of	Options	denominated in	denominated in
Plan	(Shares)	Each Calendar Year	(Shares)	shares (Shares)	cash (in dollars)
ICP (a)	15,769,431	2%	3,000,000
SIP	10,000,000		2,000,000	750,000	$	15,000,000
ICPKE	14,199,796	2%	3,000,000

(a)Applicable to outstanding awards granted from January 27, 2006 to January 26, 2012. During 2012, the total plan award limit was reached and the ICP was replaced by the SIP.

Restricted Stock and Restricted Stock Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of restricted stock and restricted stock units granted was:

	2015		2014		2013
PPL	$	34.50	$	31.50	$	30.30
PPL Electric		34.41		31.81		30.55
LKE		34.89		30.98		30.00

Restricted Stock and Restricted Stock Units, Activity Rollforward

Restricted stock and restricted stock unit activity for 2015 was:

			Weighted-
			Average
		Restricted	Grant Date Fair
		Shares/Units	Value Per Share
PPL
Nonvested, beginning of period		3,485,520	$	30.07
	Granted	1,028,009		34.50
	Anti-dilution adjustments (a)	247,098		N/A
	Vested	(3,055,205)		29.34
	Forfeited	(25,947)		30.70
Nonvested, end of period (b)		1,679,475		29.65
PPL Electric
Nonvested, beginning of period		286,811	$	30.04
	Transfer between registrants	(22,730)		29.56
	Granted	75,213		34.41
	Anti-dilution adjustments (a)	18,661		N/A
	Vested	(127,507)		29.12
	Forfeited	(9,363)		30.51
Nonvested, end of period		221,085		29.48
LKE
Nonvested, beginning of period		341,468	$	29.76
	Transfer between registrants	4,300		31.74
	Granted	98,360		34.89
	Anti-dilution adjustments (a)	24,587		N/A
	Vested	(149,752)		28.55
Nonvested, end of period		318,963		29.65

(a)Includes adjustment to all restricted stock units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 1,226,193 restricted stock units for which restrictions lapsed for former PPL Energy Supply employees as a result of the spinoff, but for which distribution will not occur until the end of the original restriction period of the awards.

Restricted Stock and Restricted Stock Units, Total Fair Value Vested at Year End

The total fair value of restricted stock and restricted stock units vesting for the years ended December 31 was:

	2015		2014		2013
PPL	$	28	$	11	$	12
PPL Electric		4		2		3
LKE		4				1

Performance Units, Valuation Assumptions

The weighted-average assumptions used in the model were:

	2015	2014	2013
Expected stock volatility	15.90%	15.80%	15.50%
Expected life	3 years	3 years	3 years

Performance Units, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of performance units granted was:

	2015		2014		2013
PPL	$	36.76	$	34.55	$	34.15
PPL Electric		37.93		34.43		33.97
LKE		37.10		34.12		33.84

Performance Units, Activity Rollforward

Performance unit activity for 2015 was:

				Weighted-
				Average Grant
		Performance		Date Fair Value
		Units		Per Share
PPL
Nonvested, beginning of period			1,171,716	$	33.77
	Granted		481,197		36.76
	Anti-dilution adjustment (a)		90,251		N/A
	Vested		(509,139)		32.12
	Forfeited		(240,485)		33.35
Nonvested, end of period (b)			993,540		33.09
PPL Electric
Nonvested, beginning of period			59,615	$	33.77
	Transfer between registrants		(3,676)		35.80
	Granted		21,798		37.93
	Anti-dilution adjustment (a)		4,627		N/A
	Vested		(8,497)		31.38
	Forfeited		(6,196)		31.38
Nonvested, end of period			67,671		33.05
LKE
Nonvested, beginning of period			173,946	$	33.32
	Granted		66,439		37.10
	Anti-dilution adjustment (a)		13,207		N/A
	Vested		(30,921)		31.35
	Forfeited		(29,507)		31.36
Nonvested, end of period			193,164		32.96

(a)Includes adjustment to all performance units granted prior to the spinoff of PPL Energy Supply as provided for under the anti-dilution provisions of PPL’s stock-based compensation Plans.

(b)Excludes 322,429 performance units for which the service vesting requirement was waived for former PPL Energy Supply employees as a result of the spinoff, but for which the ultimate number of shares to be distributed will depend on the actual attainment of the performance goals at the end of the specified performance periods.

Stock Options, Valuation Assumptions

The assumptions used in the model were:

	2013
Risk-free interest rate		1.15%
Expected option life		6.48 years
Expected stock volatility		18.50%
Dividend yield		5.00%

Stock Options, Weighted Average Grant Date Fair Value

The weighted-average grant date fair value of options granted was:

	2013
PPL	$	2.18
PPL Electric		2.19
LKE		2.18

Stock Options, Activity Rollforward

Stock option activity for 2015 was:

						Weighted-
				Weighted		Average
				Average		Remaining		Aggregate
		Number		Exercise		Contractual		Total Intrinsic
		of Options		Price Per Share		Term (years)		Value
PPL
Outstanding at beginning of period			9,042,962	$	30.93
	Anti-dilution adjustment (a)		907,737		28.06
	Exercised		(3,559,874)		27.35
	Forfeited		(5,676)		26.67
Outstanding at end of period			6,385,149		28.54		5.2	$	42
Options exercisable at end of period			5,683,535		28.78		5.0		36
PPL Electric
Outstanding at beginning of period			507,920	$	30.04
	Transfer between registrants		(15,339)		29.60
	Anti-dilution adjustment (a)		44,859		28.06
	Exercised		(224,007)		27.20
Outstanding at end of period			313,433		27.79		5.2	$	2
Options exercisable at end of period			263,443		28.02		4.8		2
LKE
Outstanding at beginning of period			623,317	$	28.64
	Anti-dilution adjustment (a)		43,236		28.06
	Exercised		(240,897)		28.04
Outstanding at end of period			425,656		26.08		6.7	$	3
Options exercisable at end of period			277,101		25.80		6.5		2

(a)Adjustments to prior year grants under the anti-dilution provisions of PPL’s stock-based compensation Plans as a result of the spinoff of PPL Energy Supply.

Compensation Costs for Restricted Stock, Restricted Stock Units, Performance Units and Stock Options

Compensation expense for restricted stock, restricted stock units, performance units and stock options accounted for as equity awards, which for PPL Electric and LKE includes an allocation of PPL Services' expense, was:

	2015		2014		2013
PPL	$	33	$	30	$	25
PPL Electric		14		12		10
LKE		8		8		8

The income tax benefit related to above compensation expense was as follows:

	2015		2014		2013
PPL	$	14	$	12	$	11
PPL Electric		6		5		4
LKE		3		3		3

Unrecognized Compensation Cost, Nonvested Restricted Stock, Restricted Stock Units, Performance Units and Stock Option Awards

At December 31, 2015, unrecognized compensation expense related to nonvestedrestricted stock, restricted stock units, performance units and stock option awards was:

			Weighted-
	Unrecognized		Average
	Compensation		Period for
	Expense		Recognition
PPL	$	8		1.6 years
PPL Electric		2		1.6 years
LKE		1		1.4 years